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Design of the Metal Precursors Molecular Structures in Impregnating Solutions for Preparation of Efficient Ni Mo/Al_2O_3 Hydrodesulfurization Catalysts 认领 引用 被引量：13
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作者 Li Huifeng Li Mingfeng +2 位作者 Chu Yang Liu Feng Nie Hong 《China Petroleum Processing & Petrochemical Technology》 CAS 2015年第4期37-45,共9页
The molecular structures of metal precursors in the impregnating solution were designed so as to prepare efficient Ni Mo/Al_2O_3 hydrodesulfurization(HDS) catalysts. At first, five typical impregnating solutions were ... The molecular structures of metal precursors in the impregnating solution were designed so as to prepare efficient Ni Mo/Al_2O_3 hydrodesulfurization(HDS) catalysts. At first, five typical impregnating solutions were designed; the existing metal precursors, such as [Mo4(citrate)2O11]4--like, [P2Mo18O62]6--like and [P2Mo5O23]6--like species in the solutions were confirmed by laser Raman spectroscopy(LRS). The UV-Vis spectra results indicated that the solutions containing both phosphoric acid and citric acid could change the existing form of nickel species. Five corresponding Ni Mo/Al_2O_3 catalysts were prepared by the incipient wetness impregnation method. The LRS analysis results of dried catalysts showed that the above metal precursors could be partly retained on alumina support after impregnation and drying, although the interface reaction between different metal precursors and alumina support unavoidably took place. Then the catalysts were sulfided and characterized by N2 physisorption, TEM and XPS analyses. The results showed that different metal precursors in impregnating solution could mainly result in the difference in both the morphology of(Ni)Mo S2 slabs and the promoting effect of Ni species. The catalyst prepared mainly with [P2Mo5O23]6--like species used as precursors exhibited worse dispersion of(Ni)Mo S2 slabs and lower ratio of Ni–Mo–S active phases than the one with [Mo4(citrate)2O11]4--like species. Promisingly, the catalyst prepared with co-existing [Mo4(citrate)2O11]4--like, [P2Mo18O62]6--like and [P2Mo5O23]6--like species showed better hydrodesulfurization activity for 4,6-DMDBT thanks to its more well-dispersed Ni–Mo–S active phases. 展开更多
关键词 molecular structures of metal precursors impregnating solution citric acid phosphorous hydrodesulfurization
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Coagulating Processes of Impregnating Spun-Laced Non-Woven Substrates with PU Dispersion 认领 引用
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作者 吴婵娟 朱泉 《Journal of China Textile University(English Edition)》 2000年第3期16-19,共4页
PU dispersion was chosen as an impregnating agent to produce leather-like sheet on spun-laced nonwoven.Three typical coagulating processes were studied.It was found that the best coagulating process for the chosen PUd... PU dispersion was chosen as an impregnating agent to produce leather-like sheet on spun-laced nonwoven.Three typical coagulating processes were studied.It was found that the best coagulating process for the chosen PUdispersion to get the leather-like sheet was coagulation in a sodium chloride solution.The detailed study of coagu-lating processes in sodium chloride solution was carriedout and optimal condition was obtained.Some experi-mental results were elucidated.Keywords:PU dispersion,coagulating, impregnating,ar-tificial leather,spun-laced nonwoven. 展开更多
关键词 PU dispersion coagulating impregnating artificial leather spun-laced nonwoven.
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Preparation of Porous Ceramics with Activated Carbon Impregnated Mullite Precursor and Their Properties 认领 引用
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作者 XI Jianfei ZHANG Ling +2 位作者 NIU Shunan LUO Shitong DUAN Mingjun 《China's Refractories》 CAS 2026年第1期29-37,共9页
The recycling of waste activated carbon is of great significance in environmental protection.Porous mullite ceramics were prepared by impregnating the mullite precursor with activated carbon,adding a pore-forming agen... The recycling of waste activated carbon is of great significance in environmental protection.Porous mullite ceramics were prepared by impregnating the mullite precursor with activated carbon,adding a pore-forming agent,and adopting aluminum sulfate octahydrate,ammonia and silica micropowder as raw materials,waste activated carbon after heat treatment as the pore-forming agent,and sodium polyacrylate(PAAS)as the dispersant.The effects of the activated carbon additions(1.5%,3.0%,5.2%,and 7.8%,by mass)and PAAS additions(1%,2%,and 3%,extra adding,by mass)on the physical properties,phase composition and microstructure of the porous ceramics were studied.The results show that:(1)as a pore-forming agent,activated carbon promotes the formation of pores inside the samples,while the apparent porosity of the samples increases significantly with the increasing activated carbon addition;when the activated carbon addition is 7.8%,the apparent porosity of the sample is 65.7%,the cold compressive strength is 4.62 MPa,the peak pore size is around 3.5μm,and the pore size distribution is uniform;(2)appropriate PAAS helps to improve the dispersion of activated carbon in the samples and the comprehensive performance of the porous mullite ceramics;when the PAAS addition is 2%,the apparent porosity of the sample is 71.8%,the cold compressive strength is 5.53 MPa,the peak pore size is around 3μm,and the pore size distribution is optimized;however,excessive PAAS increases the liquid phase in the system,resulting in over sintering of mullite and a decrease in the porosity. 展开更多
关键词 waste activated carbon porous mullite ceramics impregnating precursor dispersant
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Ceramizable Perforated Silicone Foam for Thermal Insulation and Refractory Building Materials 认领 引用
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作者 Xiang-Yuan Tian Xin Zhang +3 位作者 Dian-Bo Zhang Ya Liu Xiao-Pei Wang Zhen-Xiu Zhang 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第6期1868-1882,I0017,共15页
Liquid silicone rubber foam(LSRF)offers superior processability,high mechanical flexibility,and low thermal conductivity,which are of great significance for achieving long-term thermal insulation and fire resistance b... Liquid silicone rubber foam(LSRF)offers superior processability,high mechanical flexibility,and low thermal conductivity,which are of great significance for achieving long-term thermal insulation and fire resistance but remain challenging to achieve.We first prepared LSRF with excellent open-cell performance,achieving a water absorption rate of 242.5%,and then explored the advantages of flame-retardant solution impregnation in the open-cell structure.Meanwhile,the synergistic flame-retardant effect of kaolin(KL),glass powder(GP),and silica aerogel(AG)was investigated.When the composite formulation was LSRF/30KL10GP20AG,the material exhibited outstanding flame-retardant properties:the limiting oxygen index(LOI)reached 33.2%,an increase of 9%compared with unfilled LSRF,the vertical burning rating was V-0,and the water contact angle of the surface after combustion was 160.35°,meeting the superhydrophobic standard.At the same time,the sample LSRF/30KL10GP20AG showed a 49.6%reduction in peak heat release rate and an 83.8%reduction in total peak smoke production compared to LSRF.Under butane-flame impingement at 1300℃,the flame-retardant LSRF maintained an intact structure for 120 s,with the backside temperature rising only to 219℃,demonstrating excellent thermal insulation performance.In a high-temperature environment at 800℃,the foam well retained its original cell structure and maintained volume stability,forming a dense,hard ceramicized carbon layer with a compressive strength of 2.69 MPa.The fillers were uniformly impregnated and distributed on the foam surface and cell walls,endowing the material with durable flame retardancy,low smoke generation,and minimal toxic gas release,effectively inhibiting the spread of flames during fires and enabling LSRF foam to be widely applied in the field of building flame retardancy. 展开更多
关键词 Liquid silicone rubber foam Vacuum impregnation Flame-retardant Thermal insulation Ceramization
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Assessment of surface treatment systems for protecting concrete structure 认领 引用
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作者 Jinping Lu Sam Leng Choon Kim 《Biogeotechnics》 2026年第2期85-89,共5页
The BS EN 1504–2:2004 groups surface treatments into three types:impregnations,hydrophobic impregnations,and surface applied corrosion inhibitors.Impregnations reduce surface porosity by filling concrete pores,while ... The BS EN 1504–2:2004 groups surface treatments into three types:impregnations,hydrophobic impregnations,and surface applied corrosion inhibitors.Impregnations reduce surface porosity by filling concrete pores,while hydrophobic impregnations create a water-repellent surface without filling pores.Surface applied corrosion inhibitors form a protective film on the rebar surface.Impregnation strengthens the surface by blocking pores with reaction products that reduce ingress of aggressive agents.Hydrophobic impregnation produces a hydrophobic and water-repellent surface that inhibits water penetration while allowing concrete to breathe.Corrosion inhibitors migrate to the steel surface and form a mono-molecular film,preventing further corrosion.In this study accelerated corrosion test was used for determination of the effectiveness of each category in offering corrosion protection by subjecting concrete specimens coated with these surface treatments to accelerated corrosion conditions that is intended to induce corrosion in the embedded rebars.This paper presents test results for the performance of these three surface treatments on grade G30 and G40 concretes.Results show that hydrophobic agents are more effective than traditional impregnates in reducing water absorption and chloride penetration. 展开更多
关键词 Surface treatment Impregnation Hydrophobic surface coating Surface applied corrosion inhibitors Concrete protection
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Simultaneous catalytic removal of NO and chlorobenzene over Mn-Ce-Sm-Sn-O_x/P84 composite catalytic filter 认领 引用 被引量：3
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作者 Mutao Xu Liguo Chen +6 位作者 Xinpei Cheng Qijie Jin Ranran Zhou Jian Yang Chengzhang Zhu Sheng Wang Haitao Xu 《Journal of Rare Earths》 SCIE EI CAS CSCD 2025年第3期526-533,I0004,共8页
The integration of surface filtration and catalytic decomposition functions in catalytic bags enables the synergistic removal of multiple pollutants(such as dust,nitrogen oxide,acid gases,and dioxins)in a single react... The integration of surface filtration and catalytic decomposition functions in catalytic bags enables the synergistic removal of multiple pollutants(such as dust,nitrogen oxide,acid gases,and dioxins)in a single reactor,thus effectively reducing the cost and operational difficulties associated with flue gas treatment.In this study,Mn-Ce-Sm-Sn(MCSS)catalysts were prepared and loaded onto hightemperature resistant polyimide(P84)filter through ultrasonic impregnation to create composite catalytic filter.The results demonstrate that the NO conversion rates of the composite catalytic filter consistently achieve above 95%within the temperature range of 160-260℃,with a chlorobenzene T90value of 230℃.The ultrasonic impregnation method effectively loaded the catalyst onto the filter,ensuring high dispersion both on the surface and inside the filter.This increased exposure of catalyst active sites enhances the catalytic activity of the composite catalytic filter.Additionally,increasing the catalyst loading leads to a gradual decrease in permeability,an increase in pressure drops and the long residence time of the flue gas,thereby improving catalytic activity.Compared to ordinary impregnation methods,ultrasonic impregnation improves the bonding strength between the catalyst and filter,as well as the permeability of the composite catalytic filter under the same loading conditions.Overall,this study presents a novel approach to prepare composite catalytic filter for the simultaneous removal of NO and chlorobenzene at low temperatures. 展开更多
关键词 Compound catalytic filter Simultaneous catalysis Polyimide fibers Ultrasonic impregnation Rare earths
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Preparation of porous MgO/ZrO2-supported amine-based adsorbents and their application in CO2capture 认领 引用 被引量：1
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作者 SHI Guoliang ZHANG Xinying +1 位作者 LI Xiaolan HOU Chunyue 《燃料化学学报（中英文）》 EI CAS CSCD 北大核心 2025年第6期935-942,共8页
Currently,the solid adsorbents with porous structure have been widely applied in CO2capture.However,the unmodified MgO-ZrO2adsorbents appeared to be low adsorption capacity of CO2.The solid adsorbent material... Currently,the solid adsorbents with porous structure have been widely applied in CO2capture.However,the unmodified MgO-ZrO2adsorbents appeared to be low adsorption capacity of CO2.The solid adsorbent materials were successfully synthesized by loading TEPA onto the pore MgO/ZrO2carriers in the paper.The pore structure and surface characteristic of the samples were analyzed by using XRD,BET,FT-IR and SEM.The adsorbent materials exhibited microcrystalline state,and the crystallinity of all samples gradually decreased as the increase of TEPA content.The pore structure analysis indicated that the modification of MgO-ZrO2adsorbents with TEPA led to the decrease of the specific surface areas,but the narrow micro-mesopore size distributions ranging from 1.8-12 nm in the adsorbents still were maintained.FT-IR spectrum results further verified the successful loading of TEPA.The adsorption capacity of the adsorbents for CO2were tested by using an adsorption apparatus equipped with gas chromatography.The results indicated that when the TEPA loading reached 50%,the sample exhibited the maximum adsorption value for CO2,reaching 4.07 mmol/g under the operation condition of 75℃and atmospheric pressure.This result could be assigned to not only the base active sites but also the coexistence of both micropore and mesopore in the adsorbent.After three cycles tests for CO2capture,the adsorption value of the sample for CO2can also reached 95%of its original adsorption capacity,which verified the excellent cyclic operation stability. 展开更多
关键词 CO2capture amine-based adsorbent impregnation micro-mesopore adsorption
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Oxidation Resistance of Form-stable Hightemperature Phase Change Thermal Energy Storage Materials Doped by Impregnated Graphite 认领 引用
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作者 LI Baorang DAI Jianhuan +2 位作者 ZHANG Wei LIU Xiangchen YANG Liu 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2025年第1期1-12,共12页
We adopted the solution impregnation route with aluminum dihydrogen phosphate solution as liquid medium for effective surface modification on graphite substrate.The mass ratio of graphite to Al(H2PO4)3 change... We adopted the solution impregnation route with aluminum dihydrogen phosphate solution as liquid medium for effective surface modification on graphite substrate.The mass ratio of graphite to Al(H2PO4)3 changed from 0.5:1 to 4:1,and the impregnation time changed from 1 to 7 h.The typical composite phase change thermal storage materials doped with the as-treated graphite were fabricated using form-stable technique.To investigate the oxidation and anti-oxidation behavior of the impregnated graphite at high temperatures,the samples were put into a muffle furnace for a cyclic heat test.Based on SEM,EDS,DSC techniques,analyses on the impregnated technique suggested an optimized processing conditions of a 3 h impregnation time with the ratio of graphite:Al(H2PO4)3 as 1:3 for graphite impregnation treatment.Further investigations on high-temperature phase change heat storage materials doped by the treated graphite suggested excellent oxidation resistance and thermal cycling performance. 展开更多
关键词 phase change materials graphite impregnation method oxidation,sintering thermal analysis
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Impact of Extreme Environmental Temperature on the Electric-Thermal Field Distribution of ERIP Bushing for 750 kV High Voltage Reactors 认领 引用
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作者 Minjie Li Wanhao Shi +3 位作者 Dingqian Yang Manman Yuan Jiabao Du Xuandong Liu 《Energy Engineering》 EI 2025年第10期4297-4312,共16页
In Xinjiang,China,Oil-immersed paper bushings used in reactors are highly susceptible to discharge breakdown faults due to drastic fluctuations in environmental and oil temperatures.To mitigate this problem,oil-free a... In Xinjiang,China,Oil-immersed paper bushings used in reactors are highly susceptible to discharge breakdown faults due to drastic fluctuations in environmental and oil temperatures.To mitigate this problem,oil-free and explosion-proof epoxy resin-impregnated paper(ERIP)bushings are recommended as replacements.This study develops a multi-physics(electric-thermal-fluid)coupling model for 750 kV high voltage reactors ERIP bushings.The model aims to comprehensively assess their thermal and electrical performance under extreme ambient temperatures ranging from−40℃ to 90℃ and oil temperatures varying from−10℃ to 90℃.The results demonstrate that the bushing temperature rises consistently with increases in ambient temperature.Additionally,the location of the hottest point on the conductive rod exhibits an upward shift as the ambient temperature climbs.Significantly,when a temperature difference exists between the oil and the external environment,this upward movement remains relatively constrained.Even when the external temperature increases from−40℃ to 80℃,the hottest point shifts upward only 2457 mm.Conversely,in the absence of a temperature difference between the oil and external environment,a modest 10℃ increase in ambient temperature(from 80℃ to 90℃)triggers a substantial 11,356 mm upward displacement of the hottest point.Moreover,this study reveals that the electric field distribution within the bushings remains largely unaffected by environmental temperature changes. 展开更多
关键词 Epoxy resin impregnated paper bushing temperature distribution extreme ambient temperature
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Significantly enhanced low-temperature activity and SO2/H2O tolerance of Mn-Ce-Ox/TiO2catalysts prepared by a facile citric acid assisted impregnation method 认领 引用 被引量：2
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作者 Huiyuan Li Weihui Ren +2 位作者 Hongyan Xue Jun Yu Dongsen Mao 《Journal of Rare Earths》 SCIE EI CAS CSCD 2025年第6期1195-1204,I0004,共10页
Two different Mn-Ce-Ox/TiO2 catalysts were prepared by ordinary impregnation(denoted as MCT) and citric acid assisted impregnation(denoted as MCT-CA) methods,respectively.Excellent NOxremoval is achieved over MC... Two different Mn-Ce-Ox/TiO2 catalysts were prepared by ordinary impregnation(denoted as MCT) and citric acid assisted impregnation(denoted as MCT-CA) methods,respectively.Excellent NOxremoval is achieved over MCT-CA for selective catalytic reduction with NH3(NH3-SCR),and 100% NOxconversion is obtained at 125℃ under weight hour space velocity(WHSV) of 80000 mL/(gcat·h).Particularly,100% NOxis converted on MCT-CA in the presence of 10 vol% H2O at 175℃.As H2O and SO2coexist in the reaction system for 9 h,NOx conversion can still be maintained>90%,much higher than that(22%) of MCT.A series of characterization results indicates that MCT-CA exhibits a larger BET specific surface area,pore volume,and pore size,which enhances the dispersion of Mn and Ce oxides and promotes the rapid adsorption of reactants and desorption of products.Additionally,MCT-CA possesses more Mn4+,Ce3+,chemisorbed oxygen species,and stronger reducibility,facilitating the co nversion of NO to NO2.Specially,the amount of active NH3 species and active nitrate species on MCT-CA is much more than that over MCT,The combined effect of the aforementioned factors devotes to the excellent low-temperature SCR performance and tolerance to H2O/SO2over MCT-CA. 展开更多
关键词 NH3-SCR Low-temperaturede-NOx Mn-Ce-Ox/TiO2 Citric acid Impregnation Rare earths
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Removal of elemental mercury from coal combustion flue gas by sodium halides impregnated red mud 认领 引用 被引量：1
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作者 MUHAMMAD Sarfraz LI Yang +3 位作者 YANG He JIN Lijun LI Dekang HU Haoquan 《燃料化学学报（中英文）》 EI CAS CSCD 北大核心 2025年第1期53-69,共17页
Mercury removal from coal combustion flue gas remains a significant challenge for environmental protection due to the lack of cost-effective sorbents.In this study,a series of red mud(RM)-based sorbents impregnated wi... Mercury removal from coal combustion flue gas remains a significant challenge for environmental protection due to the lack of cost-effective sorbents.In this study,a series of red mud(RM)-based sorbents impregnated with sodium halides(NaBr and NaI)are presented to capture elemental mercury(Hg0)from flue gas.The modified RM underwent comprehensive characterization,including analysis of its textural qualities,crystal structure,chemical composition,and thermal properties.The results indicate that the halide impregnation substantially impacts the surface area and pore size of the RM.Hg0 removal performance was evaluated on a fixed-bed reactor in simulated flue gas(consisting of N2,O2,CO2,NO and SO2,etc.)on a modified RM.At an optimal adsorption temperature of 160℃,NaI-modified sorbent(RMI5)offers a removal efficiency of 98%in a mixture of gas,including O2,NO and HCl.Furthermore,pseudo-second-order model fitting results demonstrate the chemisorption mechanism for the adsorption of Hg0 in kinetic investigations. 展开更多
关键词 mercury removal red mud sodium halides impregnation flue gas
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A proton-conducting solid oxide fuel cell for co-production of ethylene and power via ethane conversion 认领 引用 被引量：1
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作者 Jun Luo Yanya Liu +5 位作者 Jianghuaxiong Zhu Chengxiong Wang Yunkun Zhao Dong Yan Jian Li Lichao Jia 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第7期631-635,共5页
Ethylene(C2H4)is a core raw material for the petrochemical industry.It is of economic and environmental significance to use C2H6as the fuel and proton-conducting solid oxide fuel cells(P-SOFC)as the reacto... Ethylene(C2H4)is a core raw material for the petrochemical industry.It is of economic and environmental significance to use C2H6as the fuel and proton-conducting solid oxide fuel cells(P-SOFC)as the reactor to co-generate electricity and C2H4.However,the large-sized Ni particles in the conventional Nicermet anode directly crack C2H6;and oxide materials with a mild capability of breaking C-C bonds are generally limited to electrolyte-supported structures with high ohmic impedance.This research for the first time constructs an anode-supported cell using BZCY as the porous scaffold and impregnated double perovskite(PrBa)0.95(Fe0.8Ni0.2)1.8Mo0.2O6-δ(PBFNM0.2)as the anode electrocatalysis.FeNi3 nanoparticles exsolve from PBFNM0.2 in H2 and uniformly distribute on the surface of perovskite substrate,acting as an active component for C2H6dehydrogenation and electrochemical performance enhancement.The cell with 30 wt%PBFNM0.2 impregnated anode showing a high power density of 508 and 386mW/cm2 with H2 and C2H6fuels,respectively;high C2H6conversion of 50.9%,C2H4selectivity of 92.1%,and C2H4yield of 46.9%are achieved at 750℃and 700mA/cm2,which outperforms all previously electrolyte-supported cells for co-generated electricity and ethylene.Moreover,the cell demonstrated excellent recoverability throughout three dehydrogenation-regeneration cycles.This work provides a practical way with broad application potential to create a novel anode-supported cell efficiently realizing the co-generation of electricity and C2H4from C2H6. 展开更多
关键词 Proton-conducting solid oxide fuel cells Impregnated anodes Ethane conversion Ethylene Power
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Preparation of Co-MnOx/GAC catalyst by high-gravity technology and its mechanism for synergistic catalytic ozone degradation of phenol 认领 引用
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作者 Cibin Wang Kangrui Nie +5 位作者 Zhiwei Zhao Yan Xue Tong Zhao Fuming Miao Youzhi Liu Weizhou Jiao 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2025年第5期208-218,共11页
The impregnation method for preparing catalysts often faces challenges such as prolonged preparation times and poor dispersion of active components due to the limited mobility of the impregnation liquid.The rotating p... The impregnation method for preparing catalysts often faces challenges such as prolonged preparation times and poor dispersion of active components due to the limited mobility of the impregnation liquid.The rotating packed bed(RPB)can break the precursor solution into fine droplets,enabling dynamic impregnation of active components onto the surface of activated carbon.This approach facilitates the uniform distribution of active components on the carrier and enhances the stability and performance of the catalyst.In this study,activated carbon catalysts were prepared using high-gravity technology.It was found that the preparation time for Co-MnOx/GAC using the RPB method was reduced by 98%,the catalytic activity increased by 6.62%,and the loadings of active components increased by 13%and 17%,the catalytic activity remained stable after five cycles,with a significantly lower rate of metal dissolution.A suite of complementary analytical techniques demonstrates that Co-MnOx/GAC(RPB)has higher homogeneity and dispersion.X-ray photoelectron spectroscopy(XPS)results indicate that Co(II)and Mn(IV)/Mn(III)are the primary active sites during the catalytic decomposition of ozone,elucidating the mechanism of synergistic catalytic ozonation by dual-active components.Finally,electron paramagnetic resonance(EPR)confirmed that hydroxyl radicals($OH)were the predominant reactive species in the reaction. 展开更多
关键词 High-gravity technology Dynamic impregnation Co-MnOx/GAC Uniform distribution Stability Synergy catalytic
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The Potential of Wacapou (Vouacapoua americana) Extracts to Develop New Biobased Protective Solutions for Low-Durability Wood Species 认领 引用
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作者 Emma Kieny Kévin Candelier +8 位作者 Louis Milhe Yannick Estevez Cyrielle Sophie Romain Lehnebach Jérémie Damay Daniela Florez Emeline Houël Marie-France Thévenon Julie Bossu 《Journal of Renewable Materials》 EI CAS 2025年第1期79-100,共22页
The valorization of Amazonian wood residues into active chemical compounds could be an eco-friendly,cost-effective and valuable way to develop wood preservative formulations to enhance the decay and termite resistance... The valorization of Amazonian wood residues into active chemical compounds could be an eco-friendly,cost-effective and valuable way to develop wood preservative formulations to enhance the decay and termite resistance of low-durable wood species.Wacapou(Vouacapoua americana.,Fabaceae)is a well-known Guianese wood spe-cies commonly used in local wood construction due to its outstanding natural durability,which results from the presence of a large panel of extractives compounds.In addition,its industrial processing generates large amounts of residues.Wacapou residues were extracted by maceration using four different solvents(water/ethanol,ethyl acetate,hexane and dichloromethane/methanol),separately and successively.The yield of each extractive fraction was determined,and their chemical compositions were analyzed by Liquid Chromatography-Mass Spectrometry(LC-MS).Ethyl acetate led to the highest extraction yield,and the active compounds were identified in the obtained extractive fraction.In this sense,the fungicidal and termite-repellent properties of these extractives were then tested using a screening laboratory(with temperate and tropical microorganisms),according to the solution concentration(1%,2.5%,5%,8%and 10%).Finally,Virola michelii Heckel wood samples(low durable species)were impregnated with the 8%concentration solution.The impregnated wood samples were then exposed to a soil bed test.The results highlighted that the nature of the solvent used during wood maceration affects the con-tent of the obtained extractive fractions.Ultra-Performance Liquid Chromatography–High-Resolution Mass Spectrometry(UHPLC-HRMS)analyses showed the influence of extraction parameters on the nature of the extracted molecules.Wacapou extracts(from ethyl acetate maceration)showed good anti-fungal and anti-termite activities.Additionally,the concentration in extractives had an impact on the anti-termite activity level for Reti-culitermesflavipes and Cryptotermes sp.Formulations based on Wacapou extractives showed a good potential for valorization in eco-friendly preservatives,aiming to confer better durability to local low-durability wood species. 展开更多
关键词 Anti-fungal and anti-termite activities conferred durability extractives French Guiana impregnation guianese species wood by-products
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Evaluating the Potential of Birch Bark Suberinic Acids for Solid Wood Impregnation 认领 引用
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作者 Daniela Godina Guntis Sosins +3 位作者 Aigars Paze Janis Rizikovs Raimonds Makars Andreas Treu 《Journal of Renewable Materials》 EI CAS 2025年第1期147-161,共15页
Instead of the traditional linear model of taking,making,and disposing,the circular bio-economy promotes a regenerative approach.Although there is potential to create valuable products like betulin,lupeol,and suberini... Instead of the traditional linear model of taking,making,and disposing,the circular bio-economy promotes a regenerative approach.Although there is potential to create valuable products like betulin,lupeol,and suberinic acids(SA)from outer birch bark,many industries,such as plywood and pulp,often choose to incinerate substan-tial amounts of leftover birch bark to meet their energy needs.This highlights the importance of obtaining valu-able products from wood.The objective of this study was to examine various fractions of SA and assess their potential for wood impregnation.The fractions included SA potassium salts in ethanol(SAK-EtOH)and water(SAK-H2O),SA suspension in water(SAS-H2O)and dried SA,which was subsequently diluted in ethanol(DSA-EtOH).There is significant potential for utilizing SA in wood treatment formulations as a sustainable alternative to harmful petroleum-derived chemicals.This approach not only addresses environmental concerns but also enhances the functionality of wood in construction applications,such as improving impregnation for moisture and fungal protection.Among the solutions tested,the ethanol solution of SA,specifically DSA-EtOH,showed the highest weight percent gain(WPG)and the greatest leaching resistance.GPC analysis showed that SA salts in ethanol(SAK-EtOH)and water(SAK-H2O)predominantly consist of low molecular fractions and each process(acidification and drying)reduces the low molecular content in the sample.This suggests that SA polymerizes after drying,making it necessary to dissolve it in ethanol to meet the requirements for impregnation.Further opti-mization,including adjustments in the concentration of the SA ethanol solution and the curing temperature,is essential to identify the optimal conditions for more in-depth impregnation studies. 展开更多
关键词 Birch bark suberinic acids solid wood impregnation
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Self-oxygenated wearable light-emitting bandage for photobiomodulation against diabetic wounds 认领 引用
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作者 Shenyan Zhang Lingbao Kong +1 位作者 Penghao Ji Minfeng Huo 《Advanced Photonics Nexus》 CSCD 2025年第4期42-53,共12页
Chronic diabetic wounds,a common and severe complication of diabetes,are characterized by their inability to heal due to impaired blood and oxygen supply.In addition to glycemic control,various clinical treatments suc... Chronic diabetic wounds,a common and severe complication of diabetes,are characterized by their inability to heal due to impaired blood and oxygen supply.In addition to glycemic control,various clinical treatments such as wound dressings,hyperbaric oxygen therapy,and phototherapy have been employed to manage these wounds.Low-level light therapy has emerged as an effective,noninvasive,and painless therapeutic approach for wound management.However,the bulkiness of traditional light sources and the need for frequent clinic visits have limited its widespread adoption.We have developed a wearable,flexible light-emitting bandage with cyanobacterial impregnation(LEB@Cyan).The bioactive bandage is designed to provide sustained oxygen generation and robust photobiomodulation,promoting keratinocyte migration,fibroblast proliferation,and angiogenesis.This addresses the hypoxic conditions and enhances bioenergetic supply to accelerate the healing process of diabetic wounds.In detail,the wound area of diabetic rats treated with LEB@Cyan showed significant reductions of 74.76%and 96.32%compared with that of LEB-treated diabetic rats and untreated diabetic rats,respectively.Such self-oxygenated wearable light-emitting fabric holds great promise for future clinical and commercial applications,potentially revolutionizing the management of chronic diabetic wounds. 展开更多
关键词 light-emitting fabric diabetic wounds photobiomodulation cyanobacterial impregnation low-level light therapy
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Facial Fabrication of Biomimetic Water Pinning Microstructures on Polyethylene Surfaces with Robust Superhydrophobic Wetting State 认领 引用 被引量：1
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作者 Yuzhu Li Hang Gao +1 位作者 Yunhai Ma Donghui Chen 《Journal of Bionic Engineering》 SCIE EI CSCD 2020年第4期644-651,共8页
Applying hot-embossing technology,a simple and cost-effective method for the fabrication of microstructured High Density Polyethylene(HDPE)surfaces with a robust superhydrophobic wetting state is proposed.Micro-meshes... Applying hot-embossing technology,a simple and cost-effective method for the fabrication of microstructured High Density Polyethylene(HDPE)surfaces with a robust superhydrophobic wetting state is proposed.Micro-meshes and micro-grooves in the flexible template are filled by the PE melt in the hot embossing process.Subsequently,a two-stage microstructure on the PE film surface is formed.This PE film exhibits a contact angle of 151.8°±2°and roll-offangle of>90~when a 5μL water droplet is dropped on its surface.Water pinning ability on the surface is figured out and roll-off angles are as a quadratic function of specified water droplet volume.Specifically,a 356μN water pinng force appears on the HDPE film due to the solid-vapor composite interface on its surface.Meanwhile,self-cleaning and immersion tests reveal that the HDPE surface with micro-pillars exhibit robust Cassie impregnating wetting state against external pressure.The proposed method for facial fabrication ofmicrostructured surfaces is an appropriate candidate for the development of droplet manipulation and functional biomimetic polymer surfaces. 展开更多
关键词 water pinning hot-embossing Cassie impregnating self-cleaning microstructure
Effects of loading transition metal(Mn,Cr,Fe,Cu) oxides on oxygen storage/release properties of CeO2-ZrO2 solid solution 认领 引用 被引量：14
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作者 Zhizhe Zhai Dali Cui +5 位作者 Yongqi Zhang Yongke Hou Meisheng Cui He Zhang Jianhui Song Hao Wang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2020年第3期274-280,共7页
Cerium zirconium-based(CZ) oxygen storage materials(OSMs) play a crucial role in three-way catalysts(TWCs),while CZ needs to be modified to satisfy more rigorous emission standard.In this study,transition metal(TMs=Mn... Cerium zirconium-based(CZ) oxygen storage materials(OSMs) play a crucial role in three-way catalysts(TWCs),while CZ needs to be modified to satisfy more rigorous emission standard.In this study,transition metal(TMs=Mn,Cr,Fe,Cu) oxides modified CZ were prepared by incipient wetness impregnation method to improve the oxygen storage capacity of CZ-based materials.To clearly illustrate the influence of TM oxides,N2 adsorption-desorption,X-ray diffraction(XRD),oxygen storage capacity(OSC),temperature programmed reduction by H2(H2-TPR) and X-ray photoelectron spectroscopy(XPS) were used to characterize the physical and chemical properties of samples.It is found that,all modified CZ have higher OSC,lower reduction temperatures than those of pristine CZ.Interaction between TMOs and CZ take precedence over specific surface to influence OSC.Notably,FeOx/CZ has the highest OSC,which is about 1.9 times that of CZ and it could be attributed to synergistic effect between FeOx and CZ;CuOx/CZ has the lowest reduction temperature which is 168℃lower than that of CZ,and it can be explained by hydrogen spillover effect. 展开更多
关键词 Transition metals Ceria-Zirconia Incipient wetness impregnation OSC
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Modification of Activated Carbon Fiber by Loading Metals and Their Performance on SO2 Removal 认领 引用 被引量：34
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作者 王建英 赵风云 +2 位作者 胡永琪 赵瑞红 刘润静 《Chinese Journal of Chemical Engineering》 SCIE EI CAS 2006年第4期478-485,共8页
Metal-loaded activated carbon fibers （ACFs） were prepared by impregnation and characterized by N2 adsorption at 77K, XRD, XPS and SEM. Their properties on SO2 removal were examined in a tubular fixed bed reactor wit... Metal-loaded activated carbon fibers （ACFs） were prepared by impregnation and characterized by N2 adsorption at 77K, XRD, XPS and SEM. Their properties on SO2 removal were examined in a tubular fixed bed reactor with a model flue gas. Cobalt-loaded ACF showed the best activity among the prepared metal-loaded ACFs and a constant removal ratio of SO2 above 87% during continuous exposure to the flow of SO2/O2/H2O/N2 at 45℃ for more than 216h. The characteristic of the prepared loaded-ACFs showed that the exceptional activity of Co-ACF was attributed to the high amount of active sites due to modification by loading cobalt. 展开更多
关键词 activated carbon fiber impregnation adsorption properties
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Dry Friction and Wear Characteristics of Impregnated Graphite in a Corrosive Environment 认领 引用 被引量：18
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作者 JIA Qian YUAN Xiaoyang +2 位作者 ZHANG Guoyuan DONG Guangneng ZHAO Weigang 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2014年第5期965-971,共7页
Tribological properties of impregnated graphite are greatly influenced by preparation technology and working conditions and it’s highly susceptible to corrosion environmental impacts,but the experimental research abo... Tribological properties of impregnated graphite are greatly influenced by preparation technology and working conditions and it’s highly susceptible to corrosion environmental impacts,but the experimental research about it are few.In this paper,three kinds of impregnated graphite samples are prepared with different degree of graphitization,the tribological properties of these samples in the dry friction environment and in a corrosive environment are analyzed and contrasted.The tribo-test results show that the friction coefficient of samples is reduced and the amount of wear of samples increase when the graphitization degree of samples increases in dry friction condition.While in a corrosive environment（samples are soaked N2O4）,the friction coefficient and amount of wear are changed little if the graphitization degree of samples are low.If the degree of graphitization increase,the friction coefficient and amount of wear of samples increase too,the amount of wear is 2 to 3 times as the samples tested in the non-corrosive environment under pv value of 30MPa？m/s.The impregnated graphite,which friction coefficient is stable and graphitization degree is in mid level,such#2,is more appropriate to have a work in the corrosion conditions.In this paper,preparation and tribological properties especially in corrosive environment of the impregnated graphite is studied,the research conclusion can provide an experimental and theoretical basis for the selection and process improvement of graphite materials,and also provide some important design parameters for contact seal works in a corrosive environment. 展开更多
关键词 corrosive environment impregnated graphite graphitization dry friction coefficient of friction amount of wear
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