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Effect of dominant fractures on triaxial behavior of 3D-printed rock analogs with internal fracture networks 认领 引用 被引量：2
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作者 Lishuai Jiang Pimao Li +3 位作者 Xin He Yang Zhao Quansen Wu Ye Zhao 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第2期1390-1412,共23页
Internal structural defects in engineering rock masses vary in size,exhibit complex shapes,and are unevenly distributed.Dominant fractures within a rock mass often play a critical to its mechanical behavior,directly a... Internal structural defects in engineering rock masses vary in size,exhibit complex shapes,and are unevenly distributed.Dominant fractures within a rock mass often play a critical to its mechanical behavior,directly affecting the macromechanical properties and failure modes.These fractures affect the instability and failure of the surrounding rock,significantlyimpacting the overall stability of engineering structures.Herein,sand-powder three-dimensional(3D)printing technology was used to prepare rock-like specimens with internal fracture networks.Triaxial compression testing,post-failure fracture mapping,and fractal dimension analysis of the fracture surfaces were conducted to investigate the effects of dominant fracture angles on the strength and deformation of rocks with internal fracture networks under triaxial stress.The results indicate that the dominant fracture angle has a pronounced effect on the mechanical behavior of rock.With increasing angle,both compressive strength and elastic modulus exhibit an initial decline followed by an increase.Moreover,higher confiningpressure significantlyimproves the compressive strength of fractured rock.This enhancement weakens as the confiningpressure further increases.Moreover,with increasing confiningpressure,the differences between the maximum and minimum values of elastic moduli and lateral strain ratios in fractured rock gradually decrease.Thus,the impact of the dominant fracture angle on rock mass deformation decreases with increasing confiningpressure.This research elucidates the effects of dominant fracture angles on the mechanical and failure properties of complex fractured rock masses and the influenceof the confiningpressure on these relationships.It provides valuable theoretical insights and practical guidance for stability analyses in engineering rock masses. 展开更多
关键词 Sand powder three-dimensional(3D) printing Internal fracture networks Triaxial compression Rock mechanics Fractal dimension
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3D-Printed Porous High-Entropy Alloy Boosts Peroxymonosulfate Activation for Long-Term Organic Pollutant Degradation 认领 引用
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作者 Sheng Guo Mengmeng Yang +7 位作者 Xizi Gao Yao Huang Yushan Huang Liming You Changjun Han Chao Cai Fengxi Chen Rong Chen 《Rare Metals》 SCIE EI CAS CSCD 2026年第3期355-367,共13页
High-entropy alloys(HEAs)have attracted considerable interest from researchers owing to their tunable chemical compositions,exceptional structural stability,and promising catalytic properties.However,their large-scale... High-entropy alloys(HEAs)have attracted considerable interest from researchers owing to their tunable chemical compositions,exceptional structural stability,and promising catalytic properties.However,their large-scale application is often hindered by complex manufacturing techniques and poor durability.Herein,we report a simple and cost-effective threedimensional(3D)printing strategy to fabricate a 3D-FeMnCrCo HEA catalyst with precisely controlled composition,structure,and porosity.The as-prepared 3D-FeMnCrCo catalyst exhibits high printing accuracy,excellent compression resistance,and remarkable efficiency in degrading organic contaminants using peroxymonosulfate(PMS)activation.Notably,the catalyst maintains outstanding catalytic stability over 100 consecutive cycles,which outperforms most of its powdered counterparts.Theoretical calculations and controlled experiments reveal that a synergistic combination of Fe/Mn electron donation,Comediated charge buffering,and Cr-driven orbital hybridization lowers the electron transfer energy barrier,thereby enhancing PMS activation.Mechanistic studies further show that singlet oxygen is the predominant reactive species in the 3DFeMnCrCo/PMS system.The biotoxicity of degraded pollutants and the catalyst's performance in treating actual wastewater are also systematically evaluated.This work provides critical insights into the practical application of HEAs in water treatment and guides the design of efficient,stable,and easily recoverable catalysts for environmental remediation. 展开更多
关键词 3D printing advanced oxidation process high-entropy alloy peroxymonosulfate water treatment
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Anti-inflammatory and Bone Regenerative Efficacy of Diflunisal-Loaded 3D-Printed Scaffolds in Treating Osteomyelitis 认领 引用
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作者 Jiehui Yang Li Chen +10 位作者 Mao Yang Ke Zeng Chenxin Wang Rui Zhang Mingyue Lin Huanshuo Zhang Denglang Hu Min Huang Yubao Li Yijing Stehle Qin Zou 《Journal of Bionic Engineering》 SCIE EI CSCD 2026年第2期977-991,共15页
Osteomyelitis caused by Staphylococcus aureus(S.aureus)is a severe inflammatory bone disease that is difficult to eradicate and can be life-threatening.Traditional treatments relying on high-dose systemic antibiotics ... Osteomyelitis caused by Staphylococcus aureus(S.aureus)is a severe inflammatory bone disease that is difficult to eradicate and can be life-threatening.Traditional treatments relying on high-dose systemic antibiotics often fail due to biofilm resistance and emerging drug-resistant strains.This study proposes a diflunisal-loaded 3D-printed scaffold as a novel therapeutic strategy.A composite biomaterial ink composed of gelatin(Gel),polycaprolactone(PCL),and nanohydroxyapatite(n-HA)was synthesized and used to fabricate customized porous scaffolds via 3D printing.Diflunisal was loaded onto the scaffolds using a Gel swelling method.In vitro experiments showed sustained diflunisal release under different pH conditions(pH=6.0 and 7.4)mimicking infection and protection of bone marrow stromal cells(BMSCs)from S.aureus toxins.In vivo studies revealed significant alleviation of infection and promotion of bone regeneration at the defect site.This diflunisal-loaded Gel/PCL-HA scaffold integrates anti-virulence therapy with bone regeneration,offering a promising solution for osteomyelitis treatment. 展开更多
关键词 Osteomyelitis Staphylococcus aureus Diflunisal-loaded scaffold 3D printing Bone regeneration Anti-virulence therapy
Comparative analysis of the safety and efficacy of 3D-bioprinted constructs embedded with human mesenchymal stem cells for bone regeneration 认领 引用
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作者 Jung Ho Jeon Jae-Seok Kim +9 位作者 Hun-Jin Jeong Eun Chae Kim Hyeon Jun Yoon Hye Won Kim Eunju Hong Man Soo Kim Jung Yeon Lim Minho Lee Seung-Jae Lee Sung Won Kim 《Bio-Design and Manufacturing》 SCIE EI CAS CSCD 2026年第3期514-538,I0005-I0009,共25页
Advanced therapy medicinal products are biological products that require rigorous long-term monitoring of safety and efficacy due to their sustained effects.The development of tissue-engineered products demands carefu... Advanced therapy medicinal products are biological products that require rigorous long-term monitoring of safety and efficacy due to their sustained effects.The development of tissue-engineered products demands careful consideration of tissue-specific properties,surgical requirements,biomaterial compatibility,host tissue integration,and potential immune responses.In this study,we developed and evaluated the safety and efficacy of 3D-bioprinted constructs containing cells for bone regeneration in preclinical models.Three types of human mesenchymal stem cells(bone marrow-derived,adipose-derived,and nasal turbinate-derived)were combined with varying concentrations of collagen and polycaprolactone.Safety assessments included comprehensive tumorigenicity evaluations involving cell viability assays,protein quantification,and whole-genome sequencing under multiple conditions to confirm genetic stability and mitigate tumorigenic risks.Short-term toxicity was evaluated by subcutaneous implantation in nude mice,with blood and serum analyses confirming the absence of acute toxicity or histological abnormalities in major organs.Efficacy studies in rabbits exhibited safety through post-transplantation analyses,with 6-month tissue analyses showing significantly elevated expression of osteopontin and runt-related transcription factor 2(RUNX2)proteins in constructs containing human nasal turbinate-derived mesenchymal stem cells,indicating successful tissue integration and bone-specific marker expression.Long-term follow-up confirmed construct integrity and sustained bone formation.These findings highlight the importance of comprehensive safety and efficacy evaluations across cell types and construct compositions in the development of 3D-bioprinted constructs for bone regeneration.This study establishes a systematic framework for material selection and validation in preclinical stages,providing a foundation for future clinical applications in regenerative medicine and tissue engineering. 展开更多
关键词 Mesenchymal stem cells 3D printing Bioprinting Acute toxicity test Transplantation
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3D-printed silicone rubber for gas-driven soft robots 认领 引用
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作者 ZENG Xin-xi DOU Zi-hao +10 位作者 GUO Yun-long GAO Yi-xuan LUO Jiang PAN De-sheng XI Xiao-qing SUN Chao-yang QIAN Ling-yun LI Pei-pei ZHU Peng-fei LI Bo ZHOU Ji 《Journal of Central South University》 SCIE EI CAS CSCD 2026年第5期2231-2242,共12页
Silicone rubber,widely recognized for its exceptional properties,has encountered significant limitations in traditional manufacturing processes when applied to complex structures such as flexible actuators and soft ro... Silicone rubber,widely recognized for its exceptional properties,has encountered significant limitations in traditional manufacturing processes when applied to complex structures such as flexible actuators and soft robots.While additive manufacturing,particularly 3D direct writing printing,has emerged as a transformative technology for creating intricate structures with diverse materials,its application in silicone rubber for soft robotics remains underdeveloped and warrants further exploration.Therefore,to address these challenges,this study proposes 3D-printed silicone rubber for gas-driven soft robots.The extrusion process of silicone rubber was simulated using a flow field model,and its shear-thinning characteristics were verified through rheological testing to ensure that it was suitable for direct ink writing.Furthermore,the influence mechanism of wall thickness,number,length,and input air pressure on the bending deformation of the tentacle was analyzed using finite element simulations.Subsequently,a soft tentacle with a gradient structure was successfully prepared,and a pneumatic control system was built to enable clamping and extraction functions.By using direct ink writing,this study provided a new technical solution for soft robots from material property control to integrated manufacturing of functional structures.These findings are expected to enhance the development of silicone rubber for gas-driven soft robots. 展开更多
关键词 3D printing direct writing soft robots additive manufacturing
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3D printed high-temperature ceramic conformal array antenna:Design,analysis,manufacturing,and testing 认领 引用
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作者 Peng Li Ruibo Li +5 位作者 Zijiao Fan Jiujiu Han Guangda Ding Qunbiao Wang Wanye Xu Paolo Rocca 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第1期340-353,共14页
In this study,the design,analysis,manufacturing,and testing of a 3D-printed conformal microstrip array antenna for high-temperature environments is presented.3D printing technology is used to fabricate a curved cerami... In this study,the design,analysis,manufacturing,and testing of a 3D-printed conformal microstrip array antenna for high-temperature environments is presented.3D printing technology is used to fabricate a curved ceramic substrate,and laser sintering and microdroplet spraying processes are used to add the conductive metal on the curved substrate.The problems of gain loss,bandwidth reduction,and frequency shift caused by high temperatures are addressed by using a proper antenna design,with parasitic patches,slots,and metal resonant cavities.The antenna prototype is characterized by the curved substrates and the conductive metals for the power dividers,the patch,and the ground plane;its performance is examined up to a temperature of 600℃in a muffle furnace and compared with the results from the numerical analysis.The results show that the antenna can effectively function at 600℃and even higher temperatures. 展开更多
关键词 Ceramic antenna Conformal array High-temperature environment 3D printing High gain and wide band
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Design and scale-up of 3D printed bat houses with biomass-derived polymer composites 认领 引用
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作者 Xianhui Zhao Erin Webb +10 位作者 Natalie Boggess Kitty McCracken Evin Carter Oluwafemi Oyedeji Alex Roschli Tyler Smith Soydan Ozcan Jeremy Malmstead Michael Dickerson Amy Elliott Halil Tekinalp 《Additive Manufacturing Frontiers》 CAS CSCD 2026年第1期335-345,共11页
Biomass(e.g.,pine sawdust,especially high-ash content pine sawdust)is commonly disposed of as waste.Combining biomass with polymers to make composite feedstocks for 3D printing has been explored as a method to reduce ... Biomass(e.g.,pine sawdust,especially high-ash content pine sawdust)is commonly disposed of as waste.Combining biomass with polymers to make composite feedstocks for 3D printing has been explored as a method to reduce or repurpose the biomass waste.Although not all biocomposite properties are known,the wood-based polylactic acid(PLA)composite has promising qualities for applications in ecological settings.In this work,pine wood-PLA composite feedstock was used to 3D print supplemental roost structures for endangered tree-roosting bats,which often face a paucity of suitable naturally occurring roosts.This material combination was selected because it is estimated to degrade faster than the synthetic material systems that are used widely in supplemental bat roosting structures to aid in the conservation of tree roosting bats.The layered,rough surface created by the 3D printing process serves as a surface that bats can grip while roosting.Computer-aided design(CAD)models were generated based on natural roost structures,and a full-size bat house was successfully additively manufactured using a pellet-fed large-scale 3D printing system.The 3D printed hexagon exhibited a tensile strength of 22-23 MPa and a Young’s modulus of 3202-3218 MPa in the x-direction.It has been demonstrated that the 3D printed bat house can be installed on a tree in a stable fashion.This successful demonstration of a bat roost manufactured using a bioderived composite should promote its use in other fish and wildlife structures and broader industrial applications such as construction and automobiles. 展开更多
关键词 Biomass Bio-composite Artificial habitat Bat house 3D printing Additive manufacturing
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Macro-meso modifiedshear model of 3D-printed rock structural plane reinforced by basalt fiberlow-carbon geopolymer mortar 认领 引用
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作者 Shuqian Duan Xiqing Jiang +5 位作者 Shili Qiu Quan Jiang Hao Wang Jiecheng Xiong Jingwei Zhang Jinshuai Zhao 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第6期4761-4781,共21页
The presence of a structural plane poses a serious threat to the safety of the surrounding rock in tunnels during construction.This study innovatively applied the optimized basalt fiber-reinforced geopolymer mortar(FR... The presence of a structural plane poses a serious threat to the safety of the surrounding rock in tunnels during construction.This study innovatively applied the optimized basalt fiber-reinforced geopolymer mortar(FR-GPM)to reinforce the 3D-printed rock structural plane,and proposed a modified shear strength model for grouted structural planes.The macro-shear response,mesoscopic characteristics,and failure mechanisms of the grouted structural plane were investigated using direct shear tests,acoustic emission(AE)techniques,and scanning electron microscopy.The results show that the compressive strength,shear strength,and tensile strength of the sample at 7 d and 28 d are 1.5 and 1.28 times,1.31 and 1.28 times,and 1.48 and 1.37 times higher than those without fiber at a water-binder ratio of 0.5,an alkaline activator modulus of 1.2 with content of 8%,and a fiber content of 0.4%with a length of 4.5 mm.Moreover,the normal stress has the most pronounced effect on the shear response of the reinforced structural plane;the peak and residual shear stresses at 4 MPa are 1.55–2.25 times and 1.88–2.2 times higher than at 2 MPa.Furthermore,more cementitious material particles are stacked up at the interfacial transition zone of the 3D-printed complex structural plane,forming better-bonded structures.Additionally,the modified shear strength model can effectively estimate the peak shear strength of the grouted structural plane with a maximum error of only 4.08%.These research outcomes are expected to provide theoretical and technical support for the environmentally friendly and economic reinforcement of geological disasters caused by the structural plane. 展开更多
关键词 Rock structural plane Geopolymer mortar Basalt fiber Macro-meso shear response Shear strength model Acoustic emission 3D printing technology Low-carbon
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Hierarchically Architected 3D-Printed Hydrogel Evaporators Enable Synergistic Salt Management and Photocatalytic Purification 认领 引用
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作者 Xin Yang Xinqi Guo +9 位作者 Yankuan Tian Rong Zhou Yifei Gong Chengming Zhang Feng Ji Liu Liu Faxue Li Ruiyun Zhang Jianyong Yu Tingting Gao 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第10期722-737,共16页
Interfacial solar-driven water evaporation offers a sustainable route to clean water production,but faces critical challenges of salt accumulation and organic contamination in complex industrial wastewater treatment.T... Interfacial solar-driven water evaporation offers a sustainable route to clean water production,but faces critical challenges of salt accumulation and organic contamination in complex industrial wastewater treatment.To address these challenges,we engineered a multifunctional 3D-printed hydrogel evaporator with vertically aligned grid architectures and hierarchical porosity.This unique structure promotes rapid water replenishment and Marangoni-driven salt back-diffusion through millimeter-scale channels,effectively preventing salt crystallization.By integrating carbon black and the metal-organic framework PCN-224 into the printing ink,we constructed a dual-functional photothermal-photocatalytic system.This synergistic combination not only enhances light absorption and photothermal conversion but also significantly reduces the water evaporation enthalpy.Coupled with heat-accelerated reaction kinetics,the system achieves efficient broad-spectrum photocatalytic degradation of organic pollutants.The resultant composite evaporator attains a high water evaporation rate of 2.04 kg m-2h-1under one-sun illumination,maintaining stable performance across a wide salinity range.Simultaneously,it degraded 96.5%of rhodamine B within 60 min under 1.5 kW m-2irradiation. 展开更多
关键词 Hydrogel evaporators 3D printing Salt resistance Metal-organic framework Solar desalination
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Highly Efficient EMI Shielding via 3D-printed CNT/SiC-SiO2Architectures 认领 引用
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作者 WANG Mengmeng TIAN Li +3 位作者 ZHANG Junmin LI Qinggang YANG Jinshan DONG Shaoming 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2026年第6期831-838,共8页
The development of lightweight,mechanically robust,and high-performance electromagnetic interference(EMI)shielding materials is critical for next-generation electronic and communication systems.In this study,we report... The development of lightweight,mechanically robust,and high-performance electromagnetic interference(EMI)shielding materials is critical for next-generation electronic and communication systems.In this study,we report the design and fabrication of a 3D-printed carbon nanotube/polydimethylsiloxane(CNT/PDMS)composite with tunable composition and hierarchical architecture.The resulting composite exhibits exceptional mechanical resilience,supporting loads up to 250 times its own weight and recovering fully after experiencing 40%strain.During pyrolysis in an inert atmosphere,the PDMS matrix decomposes and transforms into a SiC-SiO2ceramic phase that encapsulates the CNT network,thereby forming a hierarchically porous,multi-phase architecture.Notably,the CNT/SiC-SiO2composite demonstrates outstanding EMI shielding effectiveness(SE)of 62.0 dB in the X-band(8-12 GHz),primarily attributed to absorption(SEA=59.91 dB).This elevated absorption capability arises from synergistic effects including improved impedance matching,conduction loss,interfacial/dipole polarization,and multiple internal reflections within the hierarchically porous,multi-interface architecture.The“absorptionreflection-reabsorption”mechanism enables near-complete attenuation of incident electromagnetic waves.This work presents a scalable,3D-printing-enabled strategy for fabricating multifunctional carbon-ceramic composites with superior EMI shielding performance,which can meet the requirement of aerospace,wearable electronics,and military applications. 展开更多
关键词 electromagnetic interference(EMI) 3D printing porous CNT/SiC-SiO2ceramic EMI shielding absorption mechanism
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Innovative prospects in 3D printed bio-scaffolds for osteochondral tissue engineering:A systematic review 认领 引用
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作者 Madhan Jeyaraman Naveen Jeyaraman +2 位作者 Arulkumar Nallakumarasamy Shrideavi Murugan Sathish Muthu 《World Journal of Methodology》 2026年第1期290-304,共15页
BACKGROUND Advancements in 3D printing technologies have significantly transformed osteochondral tissue engineering,enabling the creation of scaffolds that closely mimic the structural and biological complexities of n... BACKGROUND Advancements in 3D printing technologies have significantly transformed osteochondral tissue engineering,enabling the creation of scaffolds that closely mimic the structural and biological complexities of native tissue.These scaffolds provide a 3D environment conducive to cellular adhesion,proliferation,and differentiation while maintaining critical mechanical and biodegradable properties.AIM To explore the feasibility of 3D printed scaffolds in osteochondral applications,highlights innovative materials and techniques,and addresses the existing knowledge gaps and challenges in clinical translation.METHODS This scoping review adhered to PRISMA extension for scoping reviews guidelines to systematically map innovations in 3D printed bio-scaffolds for osteochondral tissue engineering.Due to heterogeneous data,it favored a scoping over systematic or meta-analytic approaches.The review aimed to identify innovations in scaffold materials,fabrication techniques,and translational strategies.Key questions addressed bioprinting methods,scaffold designs,and translational challenges.Studies included were in English,peer-reviewed,and focused on 3D printed scaffolds for osteochondral repair.Exclusions were nonosteochondral,non-3D fabrication studies,grey literature,editorials,and non-English papers.Literature was sourced from six databases using comprehensive keywords and Boolean operators.Backward citation tracking added relevant studies;no date limits were applied.Screening followed a four-phase selection process with dual independent reviewers.Data were charted thematically without bias assessment,focusing on methods,outcomes,and future gaps.RESULTS The fabrication of biomimetic scaffolds,incorporating bioactive elements such as growth factors,has shown promise in replicating the extracellular matrix and enhancing tissue regeneration.Cutting-edge techniques,including inkjet,extrusion-based,and laser-assisted bioprinting,allow precise spatial control and multi-material integration essential for osteochondral scaffolds.Innovations such as graded scaffolds and bio-inks enriched with nanoparticles have further improved scaffold functionality,mechanical stability,and biological activity.Despite these advancements,limitations persist,including material challenges in achieving the desired balance of bioactivity,biodegradability,and mechanical properties.Fabrication methods face issues of scalability,reproducibility,and resolution,while the long-term biological interactions between scaffolds and host tissues,particularly degradation products,remain underexplored.Regulatory and economic barriers also impede clinical translation,underscoring the need for collaborative research efforts.Future directions emphasize the potential of emerging technologies,such as 4D printing,smart biomaterials,and soundwave patterning,to address current challenges and unlock new opportunities.CONCLUSION The convergence of biomaterial science,additive manufacturing,and regenerative medicine holds immense promise for advancing personalized treatments and revolutionizing osteochondral tissue engineering. 展开更多
关键词 3D printing Tissue engineers Osteochondral tissue engineering Extracellular matrix Cartilage
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3D printed composite scaffold accelerates bone regeneration by modulating immunity and promoting angiogenesis 认领 引用 被引量：1
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作者 Yiye Fan Jiaxin Yao +5 位作者 Wan Liu Lebin Wang Jing Yang Xiaoyan Zheng Junfeng Hui Daidi Fan 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2026年第1期1-18,共18页
Treating critical-size bone defects remains a significant clinical challenge,due to the complexity of achieving adequate immunomodulation,angiogenesis,osteogenic differentiation and matrix mineralization.Successful bo... Treating critical-size bone defects remains a significant clinical challenge,due to the complexity of achieving adequate immunomodulation,angiogenesis,osteogenic differentiation and matrix mineralization.Successful bone repair requires an orchestrated response in these areas to promote tissue integration and regeneration effectively.In this study,we designed and fabricated a customized,bioactive porous GDM/CeHA@CA scaffold through 3D printing and subsequent UV crosslinking techniques.The scaffold integrating Mn2+-chelated deferoxamine(DFO)-grafted gelatin methacryloyl(GDM)with citric acid-modified cerium-doped hydroxyapatite nanowires(CeHA@CA).The controlled Mn2+release from the scaffold strongly modulated macrophages polarization toward the anti-inflammatory M2 phenotype by down-regulating the MAPK signaling pathway and up-regulating the MnSOD signaling pathway.Macrophages maintain the stability of the bone microenvironment and prevent excessive inflammatory responses through immunomodulatory responses,and immunomodulated M2 macrophages promote angiogenesis and osteoblast differentiation by secreting growth factors VEGF and TGF-β.Scaffold degradation also led to the sustained release of covalently bound DFO,along with increased endogenous VEGF levels,promoted robust vascular remodeling.Additionally,the release of Ce3+/4+,as well as Ca2+and PO43−from CeHA@CA nanowires,in combination with elevated endogenous TGF-β,further boosted os-teogenesis.Therefore,GDM/CeHA@CA scaffolds are able to promote angiogenesis and osteogenic differentiation not only through direct degradation,but also indirectly through immunomodulation.Through these synergistic mechanisms of immunomodulation,angiogenesis,osteogenic differentiation and matrix mineralization,the GDM/CeHA@CA scaffold successfully accelerated the repair of the critical-size tibial bone defect in rabbits within 12 weeks.In conclusion,the 3D printed GDM/CeHA@CA composite scaffold provided a highly effective therapeutic strategy for rapid bone defects repair,making it a viable candidate for clinical applications in bone regeneration. 展开更多
关键词 3D printing Bone immunomodulation Angiogenesis Osteogenic differentiation Cerium hydroxyapatite nanowires
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3D-printed Ti/graphene composite current collectors for high-voltage aqueous zinc-ion batteries 认领 引用
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作者 Yang Zhiqiang Yang Hao +8 位作者 Wang Rui Wan Yi Zhang Yan Liu Chenhao Zhang Zian Li Yuqi Wu Mingbo Hu Han Chen De 《新型炭材料（中英文）》 SCIE EI CSCD 北大核心 2026年第3期641-651,I0048-I0062,共11页
Aqueous zinc-ion batteries(AZIBs)have significant promise as large-scale energy storage devices due to their high safety,low cost,and environmental friendliness.However,their application has been constrained by limite... Aqueous zinc-ion batteries(AZIBs)have significant promise as large-scale energy storage devices due to their high safety,low cost,and environmental friendliness.However,their application has been constrained by limited operational voltage windows.A high-voltage-resistant Ti-graphene-Ti cathode current collector(TGT)was designed and fabricated by three-dimensional(3D)printing.The surface of the TGT has a TixOy protective layer,which effectively suppresses electrolyte decomposition under high voltage conditions so that the voltage window of the battery is extended to 1.0-2.2 V without the obvious formation of by-products.Simultaneously,the graphene layer in the TGT structure significantly improves the adsorption and insertion/extraction kinetics of cations,resulting in a high specific capacity of 307.5 mAh g−1and a prolonged cycling life of the battery.The resultant AZIBs have a stable charge/discharge performance over 400 cycles at a high voltage.Furthermore,the influence of the geometric arrangements of Ti and graphene in the 3D printing process on the energy storage mechanism was investigated and provided novel insight for the development of high-voltage-resistant composite cathode current collectors for AZIBs. 展开更多
关键词 3D printing Aqueous zinc-ion batteries Composite current collectors High-voltage cathodes Wide voltage window
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3D Printed High‐Strength Hydrogel for Dual Release of Cu2+and Ag+Ions to Enhance Bone Repair and Antibacterial Properties 认领 引用
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作者 Zhizhong Sun Yifei Wang +6 位作者 Yi Zheng Minying Li Longbao Feng Ziwei Jiang Hengrui Liu Rui Guo Weipeng Sun 《Rare Metals》 SCIE EI CAS CSCD 2026年第6期469-486,共18页
Bone restoration is often hindered by the spatiotemporal dysregulation of immune and regenerative signals.Conventional bio‐inert implants,providing only passive support,fail to modulate this microenvironment,leading ... Bone restoration is often hindered by the spatiotemporal dysregulation of immune and regenerative signals.Conventional bio‐inert implants,providing only passive support,fail to modulate this microenvironment,leading to infections and poor healing.To achieve proactive regulation of the osteo‐immune niche alongside robust antimicrobial defense,we developed a novel 3D‐printed,high‐strength hydrogel composed of methacrylated silk fibroin(SFMA),copper‐epigallocatechin gallate(Cu‐EGCG),and silver nanoparticles(AgNPs),characterized by dual‐ion release kinetics.A sophisticated staged‐release strategy was engineered wherein the rapid initial burst of Cu2+establishes an immediate antimicrobial barrier and initiates early immunomodulation,whereas the sustained,long‐term release of Ag+ensures continuous pathogen suppression.This“fast‐and‐slow”synergistic release profile effectively bridges the gap between acute‐phase infection control and the requirement for a stable environment during chronic tissue maturation.In vitro studies confirmed that the hydrogel possesses superior mechanical integrity,biocompatibility,and potent antibacterial activity,significantly promoting the proliferation and osteogenic differentiation of bone marrow mesenchymal stem cells(BMSCs).In vivo results demonstrated robust new bone formation,with near‐complete anatomical restoration of critical‐size bone defects achieved within 4 weeks in the experimental group.Transcriptomic analysis further elucidated the underlying mechanism,revealing that the SFMA/Cu‐EGCG/AgNPs hydrogel significantly reshaped gene expression profiles associated with immunity and osteogenesis.By activating immune‐regulatory pathways-specifically IL‐17 and TGF‐β-the hydrogel successfully orchestrated a pro‐regenerative immune microenvironment.Simultaneously,the significant enrichment of Wnt signaling and ossification‐related pathways confirmed its dual‐functional role in accelerating bone regeneration at the molecular level.In summary,this hydrogel facilitates a synergistic“infection control‐immunomodulation‐osteogenesis”tripartite repair strategy,offering a highly promising biomimetic approach for the clinical management of complex bone defects. 展开更多
关键词 3D printed hydrogel AgNPs anti‐bacterial anti‐inflammatory bone regeneration Cu‐EGCG
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Multi-Site Chelation Enabled by 3D-Printed TiO2 Hydrogel Monoliths for Dynamic Ge(IV)Recovery in Fixed Beds 认领 引用
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作者 Wenhuan Guo Xurui Zhang +4 位作者 Guixia Fan Hongxiang Xu Yijun Cao Peng Li Daoguang Teng 《Rare Metals》 SCIE EI CAS CSCD 2026年第7期573-587,共15页
Germanium is a critical dispersed metal,yet sustainable recovery from dilute solutions is limited by sorbents that are difficult to regenerate and operate in continuous mode.Here,we fabricate a regenerable 3D-printed ... Germanium is a critical dispersed metal,yet sustainable recovery from dilute solutions is limited by sorbents that are difficult to regenerate and operate in continuous mode.Here,we fabricate a regenerable 3D-printed hydrogel monolith(3D-ATO-GS)by integrating hydroxyl-rich amorphous TiO2 nanoparticles into an alginate/gelatin scaffold using direct ink writing followed by Ca2+crosslinking under low-temperature aqueous conditions.The monolith features millimeter-scale straight-through channels coupled with a swollen nanoscale network,enabling shortened diffusion pathways and a stable fixed-bed operation.In batch tests at pH 3,3D-ATO-GS achieves a maximum Ge(IV)capture of 206.18 mg g−1 and retains>75%adsorption efficiency after ten adsorption-desorption cycles using 0.1 mol L−1 NaOH.In continuous-flow fixed-bed experiments,the monolith delivers a breakthrough capacity of 56.1 mg g−1 at 1.0 mL min−1,and maintains considerable capacity over three column regeneration cycles(56.1→45.6→43.3 mg g−1).Spectroscopic analyses combined with density functional theory and molecular dynamics simulations indicate that-COOH,Ti-OH,-OH,and-NH2 groups cooperatively chelate Ge(OH)4 via multi-site coordination.These results demonstrate a monolithic regenerable platform that connects molecular binding design with fixed-bed process requirements for Ge recovery. 展开更多
关键词 3D printing fixed-bed adsorption germanium recovery multi-site chelation TiO2hydrogel monolith
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Corrosion resistance and microstructure of 3D printed magnesium alloy regulated by heat treatment OA 认领 引用
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作者 Tinghui Guo Kai Zhu +4 位作者 Qi Zeng Xingpeng Liao Yao Yang Tao Ying Xiaoqin Zeng 《Corrosion Communications》 EI CSCD 2026年第2期156-165,共10页
Corrosion behavior of 3D printed Mg-3Nd-1Gd-0.2 Zn alloy in three states,namely 3D print,3D print-T4,and 3D print-T6,was investigated.The 3D printed alloys were characterized using SEM,XRD,and other techniques to demo... Corrosion behavior of 3D printed Mg-3Nd-1Gd-0.2 Zn alloy in three states,namely 3D print,3D print-T4,and 3D print-T6,was investigated.The 3D printed alloys were characterized using SEM,XRD,and other techniques to demonstrate an improved corrosion resistance achieved through heat treatment.Complete dissolution of Mg41Nd5 phase in 3D printed magnesium(Mg)alloy resulted in a more uniform corrosion morphology.It improves corrosion resistance of the alloy.Moreover,reduction in surface potential of Mg3(Nd,Gd)phase after heat treatment contributes to deceleration of galvanic corrosion,while the absence of Mg41Nd5 after heat treatment slows down localized corrosion.Compared to the 3D print state,T4 and T6 treated alloys exhibit the formation of protective oxide films during corrosion.Meanwhile,after heat treatment,T4 and T6 alloys have thick and smooth corrosion product films,which may enhance corrosion resistance.In general,corrosion resistance of Mg-3Nd-1Gd-0.2 Zn alloy is improved after heat treatment. 展开更多
关键词 3D printing Mg Alloy Corrosion performance Microstructure
Thick,asymmetric electrodes enable high-energy-density 3D-printed flexible quasi-solid-state micro-supercapacitors 认领 引用
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作者 Pinjing Yao Qinghuang Huang +6 位作者 Wangyang Li Bingyuan Ke Zhibo Yang Jixi Chen Huagui Zhang Dun-Bao Ruan Xinghui Wang 《Metals Advances》 SCIE EI CAS CSCD 2026年第6期60-69,共10页
Achieving thick electrodes concurrent with efficient ion and electron transport remains a critical bottleneck in enhancing the areal energy density of micro-supercapacitors(MSCs).Herein,a quasi-solid-state MSC with bi... Achieving thick electrodes concurrent with efficient ion and electron transport remains a critical bottleneck in enhancing the areal energy density of micro-supercapacitors(MSCs).Herein,a quasi-solid-state MSC with bicontinuous thick electrodes is constructed,in which an asymmetric geometry composed of nickel hexacyanoferrate(NiHCF)and activated carbon(AC)is employed.This electrode architecture provides both continuous electron pathways and interconnected porosity,supporting high mass loading simultaneously with fast transport dynamics.The resulting NiHCF//AC MSCs show a wide potential window of 1.6 V,a superior areal capacitance up to 1826 mF cm-2at 1 mA cm-2,a notable energy density of 649μWh cm-2,and excellent cycling stability(90.2%retention of the initial capacitance after 2000 cycles).Moreover,the MSCs demonstrate excellent mechanical toughness and can be integrated into series-parallel configurations for tunable output.This work mitigates the trade-off between mass loading and charge transport,offering a feasible route toward highenergy-density,flexible,and scalable micro-energy storage systems. 展开更多
关键词 Prussian blue analogue 3D printing Asymmetric supercapacitors High energy density Miniature energy storage Thick electrodes
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A Hybrid Experimental-Numerical Framework for Identifying Viscoelastic Parameters of 3D-Printed Polyurethane Samples:Cyclic Tests,Creep/Relaxation and Inverse Finite Element Analysis 认领 引用
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作者 Nikita Golovkin Olesya Nikulenkova +4 位作者 Vsevolod Pobezhimov Alexander Nesmelov Sergei Chvalun Fedor Sorokin Arthur Krupnin 《Computers, Materials & Continua》 SCIE EI 2026年第3期519-536,共18页
This study presents and verifies a hybrid methodology for reliable determination of parameters in structural rheological models(Zener,Burgers,and Maxwell)describing the viscoelastic behavior of polyurethane specimens ... This study presents and verifies a hybrid methodology for reliable determination of parameters in structural rheological models(Zener,Burgers,and Maxwell)describing the viscoelastic behavior of polyurethane specimens manufactured using extrusion-based 3D printing.Through comprehensive testing,including cyclic compression at strain rates ranging from 0.12 to 120 mm/min(0%-15%strain)and creepelaxation experiments(10%-30%strain),the lumped parameters were independently determined using both analytical and numerical solutions of the models’differential equations,followed by cross-verification in additional experiments.Numerical solutions for creep and relaxation problems were obtained using finite element analysis,with the three-parameter Mooney-Rivlin model and Prony series employed to simulate elastic and viscous stress components,respectively.Energy dissipation per cycle was quantified during cyclic compression tests.The results demonstrate that all three models adequately describe material behavior within the 0%-15%strain range across various strain rates.Comparative analysis revealed the Burgers model’s superior performance in characterizing creep and stress relaxation at low strain levels.While Zener and Burgers model parameters from uniaxial compression showed limited applicability for energy dissipation calculations,the generalized Maxwell model effectively captured viscoelastic properties across different strain rates.Notably,parameters derived from creep tests provided a more universal assessment of dissipative properties due to optimization based on characteristic curve regions.Both parameter sets described polyurethane’s elastic-hysteretic behavior with approximately 20%error,proving significantly more accurate than the linear strain-time dependence hypothesis.Finite element analysis(FEA)complemented numerical modeling by demonstrating that while the generalized Maxwell model effectively describes initial rapid stress-strain changes,FEA provides superior characterization of steady-state processes.This computational approach yields more physically representative results compared to simplified analytical solutions,despite certain limitations in transient analysis. 展开更多
关键词 Viscoelasticity cyclic compression hysteresis creep stress relaxation finite element method optimization 3D printing structural rheological models Prony series
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In situ preparation of nano cone-like structures on 3D printed titanium alloy implants via one-step femtosecond laser manufacturing for better osseointegration,anti-corrosion,and anti-fatigue 认领 引用 被引量：5
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作者 Yazhou Hu Hongshui Wang +5 位作者 Donghui Wang Xiaomei Xia Ning Liu Tai Yang Baoe Li Chunyong Liang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第3期88-99,共12页
The poor surface conditions and osseointegration capacity of 3D printed Ti6Al4V implants(3DPT)significantly influence their performance as orthopedic and dental implants.In this work,we creatively introduce a one-step... The poor surface conditions and osseointegration capacity of 3D printed Ti6Al4V implants(3DPT)significantly influence their performance as orthopedic and dental implants.In this work,we creatively introduce a one-step femtosecond laser treatment to improve the surface conditions and osteointegration.The surface characterization,mechanical properties,corrosion resistance,and biological responses were investigated.These results found that femtosecond laser eliminated defects like embedded powders and superficial cracks while forming the nano cones-like structures surface on 3DPT,leading to enhanced osseointegration,anti-corrosion,and anti-fatigue performance.Molecular dynamics simulations revealed the ablation removal mechanism and the formation of nano cone-like structures.These findings were further supported by the in vivo studies,showing that the FS-treated implants had superior bone-implant contact and osseointegration.Hence,the one-step femtosecond laser method is regarded as a promising surface modification method for improving the functional performance of Ti-based orthopedic implants. 展开更多
关键词 3D printed Femtosecond laser Surface modification Microanostructure Osseointegration
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3D printed organohydrogel-based strain sensors with enhanced sensitivity and stability via structural design 认领 引用 被引量：2
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作者 Binbin Guo Chengyu Lin +8 位作者 Haitao Ye Yu Xue Jiewen Mo Jiawei Chen Yangfeng Cui Chenglong Fu Jiaming Bai Qi Ge Hui Ying Yang 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2025年第5期464-479,共16页
Organohydrogel-based strain sensors are gaining attention for real-time health services and human-machine interactions due to their flexibility,stretchability,and skin-like compliance.However,these sensors often have ... Organohydrogel-based strain sensors are gaining attention for real-time health services and human-machine interactions due to their flexibility,stretchability,and skin-like compliance.However,these sensors often have limited sensitivity and poor stability due to their bulk structure and strain concentration during stretching.In this study,we designed and fabricated diamond-,grid-,and peanut-shaped organohydrogel based on positive,near-zero,and negative Poisson’s ratios using digital light processing(DLP)-based 3D printing technology.Through structural design and optimization,the grid-shaped organohydrogel exhibited record sensitivity with gauge factors of 4.5(0–200%strain,ionic mode)and 13.5/1.5×106(0-2%/2%-100%strain,electronic mode),alongside full resistance recovery for enhanced stability.The 3D-printed grid structure enabled direct wearability and breathability,overcoming traditional sensor limitations.Integrated with a robotic hand system,this sensor demonstrated clinical potential through precise monitoring of paralyzed patients’grasping movements(with a minimum monitoring angle of 5°).This structural design paradigm advanced flexible electronics by synergizing high sensitivity,stability,wearability,and breathability for healthcare,and human-machine interfaces. 展开更多
关键词 3D printing organohydrogel sensitivity stability structural design
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