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Chemically interlinked and ionically conductive sulfonated graphene framework enabling fully integrated silicon anodes for highperformance Li-ion batteries 认领 引用
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作者 Yuanyuan Yu Yuanqi Kang +2 位作者 Jiadeng Zhu Junhua Zhang Mengjin Jiang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第4期951-961,I0022,共11页
Silicon(Si)anodes offer an ultrahigh theoretical capacity but face two major barriers to commercialization:severe structural degradation caused by significant volume changes and sluggish ion transport kinetics due to ... Silicon(Si)anodes offer an ultrahigh theoretical capacity but face two major barriers to commercialization:severe structural degradation caused by significant volume changes and sluggish ion transport kinetics due to the discontinuous ionic conductance of conventional binders.To address these challenges,we develop a fully integrated Si anode using sulfonated graphene(SG)as a dual-functional ion-conductive and mechanical reinforcing framework within a conventional carboxymethyl cellulose/styrene-butadiene rubber(CMC/SBR)binder.Thermally activated reactions during electrode fabrication establish covalent sulfonate ester bonds between SG and CMC,elastic carboxylate crosslinks between SBR and CMC,and chemical anchoring between the binders and Si particles,which are all further reinforced by hydrogen bonding.This multi-bonding network not only dissipates mechanical stress and maintains electronic connectivity via embedded C65 carbon but also significantly enhances Li+transport through high intrinsic ionic conductivity of SG,facilitating the formation of a stable solid electrolyte interphase(SEI).The resulting Si@CMC/SBR/SG anode delivers a high initial capacity of 3513.2 mAh g-1and retains 77%capacity after 500 cycles at 2 A g-1.It achieves 762 mAh g-1at 4 A g-1and practical areal capacities exceeding 4 mAh cm-2.Full-cell tests with NCM811 cathodes confirm 86.2%capacity retention after 100 cycles.This work demonstrates a pragmatic and scalable integration paradigm for durable,high-energy-density Si anodes. 展开更多
关键词 Silicon anodes Sulfonated graphene Integrated electrodes Ionic transport Lithium-ion batteries
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Influence of Sulfonated Chitosan on Conductivity of Sulfonated Polyether Ether Ketone(SPEEK)at Room Temperature 认领 引用
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作者 Aina Aqilah Mohd Rizal Oskar Hasdinor Hassan +4 位作者 Nor Kartini Jaafar Masnawi Mustaffa Mohd Tajudin Mohd Ali Ajis Lepit Nazli Ahmad Aini 《Energy Engineering》 EI 2026年第1期475-492,共18页
Proton exchange membrane(PEM)is an integral component in fuel cells which enables proton transport for efficient energy conversion.Sulfonated Polyether Ether Ketone(SPEEK)has emerged as a cost-effective option with no... Proton exchange membrane(PEM)is an integral component in fuel cells which enables proton transport for efficient energy conversion.Sulfonated Polyether Ether Ketone(SPEEK)has emerged as a cost-effective option with non-fluorinated aromatic backbones for Proton Exchange Membrane Fuel Cell(PEMFC)applications,even though it exhibits lower proton conductivity compared to Nafion.This work aims to study the influence of Sulfonated Chitosan(SCS)concentrations on proton conductivity of SPEEK-based PEM at room temperature.SPEEK was synthesized using a sulfonation process with concentrated sulfuric acid at room temperature.SCS was synthesized via reflux of CS and 1.2 M H2SO4 with a ratio of 1:35(w/v)at 90℃ for 30 min.The composite membranes of SPEEK-SCS were formed with four different SCS concentrations,using the solution castingmethod,andDimethyl Sulfoxide(DMSO)was used as a solvent.The composite membranes synthesized include pure SPEEK(S0),SPEEK with 1%SCS(S1),SPEEK with 2%SCS(S2),and SPEEK with 3%SCS(S3).Fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),water uptake,degree of swelling,Ionic exchange capacity(IEC)with Electrochemical impedance spectroscopy(EIS)were used to characterize the composite membranes in terms of composition,crystallinity,water absorption,dimensional changes,number of exchangeable ions in membranes,and proton conductivity,respectively.Notably,S3 had the highest water uptake and the lowest degree of swelling.S2 had the highest proton conductivity among the SPEEK-SCS composite membranes at room temperature with 3.44×10−2 Scm-1. 展开更多
关键词 SPEEK sulfonated chitosan PEM conductivity
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Visible-light induced cascade sulfonation/cyclization reaction in water towards sulfonated dihydroisoquinolino[1,2-b]quinazolinones 认领 引用
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作者 Jun Huang Jiangping Qin +3 位作者 Caijin Ban Jingmei Yuan Jing Yang Guoping Yang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第2期415-418,共4页
A visible-light induced cascade sulfonation/cyclization reaction of 3-allyl-2-arylquinazolinones employing water as an environmentally friendly solvent was revealed.This transition metal-free protocol,using 9-mesityl-... A visible-light induced cascade sulfonation/cyclization reaction of 3-allyl-2-arylquinazolinones employing water as an environmentally friendly solvent was revealed.This transition metal-free protocol,using 9-mesityl-10-methylacridinium perchlorate as the photocatalyst,represents a masterly tactic for the synthesis of sulfonated dihydroisoquinolino[1,2-b]quinazolinones featuring mild conditions,facile operation,and broad substrate scope. 展开更多
关键词 Environmentally friendly solvent Sulfonation Radical cascade cyclization Visible-light Quinazolinone
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Engineered sulfonated chitosan membranes via controlled sulfonation:Boosting catalytic efficiencyin esterification 认领 引用
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作者 Jinzhi Gao Jiangyan Xue +1 位作者 Hao Yu Xianghong Lu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2026年第2期71-85,共15页
Film catalysts are considered a promising alternative to homogeneous and conventional solid catalysts,as they address critical challenges related to recyclability and active site accessibility.In this study,chitosan(C... Film catalysts are considered a promising alternative to homogeneous and conventional solid catalysts,as they address critical challenges related to recyclability and active site accessibility.In this study,chitosan(CS),known for its excellent film-formingability and chemical modifiability,was functionalized to produce sulfonated chitosan(SCS)catalytic filmsfor oleic acid esterification.Firstly,SCS powders were synthesized through the sulfonation of CS using 1,3-propanesulfonic acid lactone(PS)as the sulfonating agent.Structural characterization techniques(FT-IR,1H NMR,XRD and elemental analysis)confirmedthe successful sulfonation,while thermogravimetric analysis(TGA)revealed thermal stability up to 200℃.The strong acid content of SCS-6,prepared at a PS/CS molar ratio of 6,was quantifiedas 1.09 mmol·g-1through titration.This sample exhibited superior catalytic performance compared to the commercial ion-exchange resin LS-51,achieving an activation energy of 30.71 kJ·mol-1.Furthermore,the catalytic filmwas prepared from SCS-6 powder and used to catalyze the esterificationof oleic acid in both a batch stirring kettle and a continuous filmreactor.A high esterificationconversion of 96.11%was achieved in the batch stirring kettle at 65℃,using a methanol-to-oleic acid molar ratio of 10:1 and a catalyst dosage of 5%(mass).In the continuous filmreactor,an esterificationconversion of 65.31%was achieved by adjusting the flowrate to 30 ml·min-1,with a filmarea of 1962.5 mm2 and a reaction solution volume of 143.23 ml.These results underscore the potential of SCS filmcatalysts for continuous industrial production. 展开更多
关键词 Chitosan Sulfonation Esterification Catalytic film Film reactor
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Acidic-thermal coupled degradation of tylosin by using magnetic sulfonated resins under microwave irradiation 认领 引用
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作者 Caitiao Fang Wei Zhang +3 位作者 Chunmei Wang Shiling Li Xiaomin Dou Jun Liu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2025年第9期127-138,共12页
Acidic-and alkalic-hydrolyses are selective in breaking functional bonds and falling off pharmacological moieties of antibiotics in production wastewater in comparison with advanced oxidation processes.Elevating tempe... Acidic-and alkalic-hydrolyses are selective in breaking functional bonds and falling off pharmacological moieties of antibiotics in production wastewater in comparison with advanced oxidation processes.Elevating temperature can accelerate hydrolytic kinetics and improve efficiency.In this work,magnetic sulfonated polypropylene resin(Fe3O4@PS-S)composites were reported for acidic-thermal hydrolysis of tylosin by employing the acidic feature of sulfonic group,the dielectric effect of resin,and the magnetic-loss effect of magnetite under microwave irradiation.As observed,a rapid and complete mitigation 100 mg/L of tylosin was achieved within 15 min by the catalysts.Acidic cleavage of tylosin was fulfilled by sulfonic groups in the composites,and microwave thermal accelerated the hydrolysis reactions due to the dielectric and magnetic-loss effects.Differentiating the dielectric and magnetic-loss effects through electromagnetic analyses indicated that the latter contributed more in converting microwave energy to heat.The interactions under multiple operational conditions were quantitatively fitted using the Behnajady model and visually demonstrated,which indicated that a synergic effect of microwave thermal-and acidichydrolyses contributed to the efficient mitigation of tylosin.The transformation products were identified and the pathways were supposed.Cleaving deoxyaminosugars groups and destructing lactone structures led to reduced antibacterial potential and toxicity reduction.The acute toxicity of tylosin and transformation products to fish,daphnia,and green algae were all classified as non-toxic.This work suggested that this synergistic acid-thermal hydrolytic method is attractive and promising in pretreating tylosin production wastewater in field. 展开更多
关键词 Acidic-thermal coupled hydrolysis Tylosin degradation Microwave irradiation Synergetic effects Sulfonated resins
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Sulfonated Poly(α-methyl styrene-b-isobutylene-b-α-methyl styrene) Copolymers for Advanced Proton Exchange Membranes 认领 引用
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作者 Ying-Ying Zhang Zhi-Chao Zhang +3 位作者 Hao-Ran Zhao Xin Yang You-Guang Jin Yi-Xian Wu 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2025年第9期1537-1548,I0008,共12页
The sulfonated poly(α-methyl styrene-b-isobutylene-b-α-methyl styrene)copolymers(S-ASIBS)with the average molar percentage of sulfonic acid(-SO3H)groups(SP)ranging from 3.6 mol%to 14.3 mol%could be synthesized by... The sulfonated poly(α-methyl styrene-b-isobutylene-b-α-methyl styrene)copolymers(S-ASIBS)with the average molar percentage of sulfonic acid(-SO3H)groups(SP)ranging from 3.6 mol%to 14.3 mol%could be synthesized by sulfonation of ASIBS with acetyl sulfate.The hydrophilic ionic channels were generated for proton exchange membranes(PEMs)by ion aggregation of-SO3H groups and microphase separation between hydrophobic polyisobutylene and hydrophilic sulfonated poly(α-methyl styrene)segments in S-ASIBS.The proton transport ability was improved while oxidative stability was decreased by increasing SP in S-ASIBS.The appropriate SP of about 12.7 mol%in S-ASIBS provides the available PEMs with high proton transport ability,low methanol permeability and good oxidative stability.The absence of active tertiary hydrogen atoms along S-ASIBS copolymer chains avoids their attack by peroxy radicals.The residual rates of weight(RW)and proton conductivity(Rσ)of S-ASIBS-12.7 membrane after oxidation treatment for 916 h were 84.3%and 88.1%respectively,near to those of commercial Nafion 117(RW=87.9%,Rσ=90.3%).The membrane electrode assembly(MEA)could be prepared by using various S-ASIBS as PEMs for direct methanol fuel cell.The single cell with S-ASIBS-12.7 MEA behaves high performance of open circuit voltage(OCV)of 548 mV and peak power density(Pmax)of 36.1 mW·cm-2,which is similar to those of Nafion 117(OCV=506 mV,Pmax=35.6 mW·cm-2).To the best of our knowledge,this is the first example of advanced S-ASIBS membrane with high proton conductivity,excellent fuel barrier property and remarkable oxidative stability for promising PEMs. 展开更多
关键词 Poly(a-methyl styrene) Polyisobutylene Sulfonation Proton conductivity Oxidative stability
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Sulfonated covalent organic framework modified separator enables long-span and high-capacity zinc-iodine batteries 认领 引用 被引量：1
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作者 Tiao Huang Shenglin Wang +6 位作者 Ming Wang Hui Hu Jianyi Wang Xiaofang Su Songtao Xiao Jingyi Wu Yanan Gao 《Green Energy & Environment》 SCIE EI CAS CSCD 2025年第12期2475-2486,共12页
Compared with the most advanced lithium-ion batteries,aqueous zinc-iodine batteries(Zn–I2batteries)have higher theoretical capacity and energy density,thus attracting much attention in energy storage.However,due t... Compared with the most advanced lithium-ion batteries,aqueous zinc-iodine batteries(Zn–I2batteries)have higher theoretical capacity and energy density,thus attracting much attention in energy storage.However,due to several technical issues,the commercialization of Zn–I2batteries is still at a bottleneck,and among them,the“shuttle effect”of polyiodide anions is considered to be a main challenge.In order to minimize the shuttle of polyiodide species within the cathode compartment,we herein synthesize a zinc-ion conductive covalent organic framework(COF),namely DMSBA-Tp-COF,that is used to assemble a composite separator together with commercial glass fiber(GF)substrate and graphene(Gr)by a simple vacuum filtration coating technology.The negatively charged–SO3-ions present in COF coatings enable homogeneous Zn2+flux and simultaneously suppress polyiodides shuttling in the Zn–I2batteries.As a result,the composite Gr@DMSBA-Tp-COF@GF separator endows the corresponding Zn–I2symmetrical cell with excellent long-term cyclic stability with a lifespan over 800 h and high-specific capacity of 3.2 mAh cm-2(at a current density of 20 mA cm-2,voltage range of 0.7–1.7 V).This study provides a prospective strategy to rationally design functional COFs separators and accelerate their applications in high energy storage systems. 展开更多
关键词 Zinc-iodide batteries Covalent organic frameworks Sulfonic acid groups Modified separator Shuttle effect
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Proton-exchange Sulfonated Poly(ether ether ketone)/Sulfonated Phenolphthalein Poly(ether sulfone) Blend Membranes in DMFCs 认领 引用 被引量：4
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作者 高启君 王宇新 +2 位作者 许莉 王志涛 卫国强 《Chinese Journal of Chemical Engineering》 SCIE EI CAS 2009年第6期934-941,共8页
A sulfonated poly（ether ether ketone） （SPEEK） membrane with fairly high degree of sulfonation （DS） swells excessively and even dissolves at high temperature. To solve these problems, sulfonated phenolphthalein p... A sulfonated poly（ether ether ketone） （SPEEK） membrane with fairly high degree of sulfonation （DS） swells excessively and even dissolves at high temperature. To solve these problems, sulfonated phenolphthalein poly（ether sulfone） （SPES-C, DS= 53.7%） is blended with the SPEEK matrix （DS= 55.1%, 61.7%） to prepare SPEEKJSPES-C blend membrane. The decrease in swelling degree and methanol permeability of the membrane is dose-dependent. Pure SPEEK （DS = 61.7%） membrane dissolves completely in water at 70℃, whereas the swelling degree of the SPEEK （DS = 61.7%）/SPES-C （40%, by mass） membrane is 29.7% at 80℃. From room temperature to 80℃, the methanol permeability of all SPEEK （DS = 55.1%）/SPES-C blend membranes is about one order of magnitude lower than that of Nafion 115. At higher temperature, the addition of SPES-C polymer increases the dimensional stability and greater proton conductivity can be achieved. The SPEEK （DS = 55.1%）/SPES-C （40%, by mass） membrane can withstand temperatures up to 150℃. The proton conductivity of SPEEK （DS = 55.1%）/SPES-C （30%, by mass） membrane approaches 0.16 S·cm^-1, matching that of Nafion 115 at 140℃ and 100% RH, while pure SPEEK （DS = 55.1%） membrane dissolves at 90℃. The SPEEK/SPES-C blend membranes are promising for use in direct methanol fuel cells because of their good dimensional stability, high proton conductivity, and low methanol permeability. 展开更多
关键词 sulfonated poly（ether ether ketone） sulfonated phenolphthalein poly（ether sulfone） blend membrane direct methanol fuel cell
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Sulfonated fluorinated multi-block copolymer hybrid containing sulfonated(poly ether ether ketone) and graphene oxide: A ternary hybrid membrane architecture for electrolyte applications in proton exchange membrane fuel cells 认领 引用
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作者 Ae Rhan Kim Mohanraj Vinothkannan Dong Jin Yoo 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2018年第4期1247-1260,共14页
A ternary hybrid membrane architecture consisting of sulfonated fluorinated multi-block copolymer （SFMC）, sulfonated （poly ether ether ketone） （SPEEK） and I or 5 wt% graphene oxide （GO） was fabricated through ... A ternary hybrid membrane architecture consisting of sulfonated fluorinated multi-block copolymer （SFMC）, sulfonated （poly ether ether ketone） （SPEEK） and I or 5 wt% graphene oxide （GO） was fabricated through a facile solution casting approach. The simple, but effective monomer sulfonation was performed for SFMC to create compact and rigid hydrophobic backbone structures, while conventional random sulfonation was carried-out for SPEEK. Hydrophilic-hydrophobic-hydrophilic structure of SFMC enhances the compatibility with SPEEK and GO and allows for an unprecedented approach to alter me- chanical strength and proton conductivity of ternary hybrid membrane, as verified from universal test machine （UTM） curves and alternating current （AC） impedance plots. The impact of GO integration on the morphology and roughness of hybrid membrane was scrutinized using field emission scanning electron microscope （FE-SEM） and atomic force microscope （AFM）. Ternary hybrid showed uniform intercalation of GO nanosheets throughout the entire surface of membrane with an increased surface roughness of 8.91 nm. The constructed ternary hybrid membrane revealed excellent water absorption, ion exchange capacity and gas barrier properties, while retaining reasonable dimensional stability. The well-optimized ternary hybrid membrane containing 5 wt% GO revealed a maximum proton conductivity of 111.9 mS/cm, which is higher by a factor of two-fold with respect to that of bare SFMC membrane. The maximum PEMFC power density of 528.07mW/cm2 was yielded by ternary hybrid membrane at a load current density of 1321.1 mA/cm2 when operating the cell at 70 ℃ under 100% relative humidity （RH）. In comparison, a maximum power density of only 182.06 mW/cm2 was exhibited by the bare SFMC membrane at a load current density of 455.56 mA/cm2 under same operating conditions. 展开更多
关键词 Sulfonated fluorinated multi-block copolymer Sulfonated（poly ether ether ketone） Graphene oxide Hydrogen bonding Proton conductivity
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SULFONATED POLYIMIDES CONTAINING PYRIDINE GROUPS AS PROTON EXCHANGE MEMBRANE MATERIALS 认领 引用 被引量：3
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作者 Rui Lei Chuan-qing Kang +4 位作者 Yun-jie Huang Xue-peng Qiu Xiang-ling Ji Wei Xing Lian-xun Gao 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2011年第5期532-539,共8页
A series of sulfonated polyimides(SPIs)containing pyridine groups were prepared by direct polycondensation from 1,4,5,8-naphthalenetetracarboxylic dianhydride(NTDA),4,4'-diaminodiphenyl ether-2,2'-disulfonic a... A series of sulfonated polyimides(SPIs)containing pyridine groups were prepared by direct polycondensation from 1,4,5,8-naphthalenetetracarboxylic dianhydride(NTDA),4,4'-diaminodiphenyl ether-2,2'-disulfonic acid(ODADS)and 4-(4-methoxy)phenyl-2,6-bis(4-aminophenyl)pyridine(DAM).The resulting copolymers displayed good solubility in common organic solvents.Flexible,transparent,tough membranes were obtained via solution casting.All the films showed high thermal stability with desulfonation temperature over 300℃.They exhibited prominent mechanical properties with Young's modulus around 2.0 GPa.High proton conductivity(0.23 S/cm at 100%RH)was also observed.More importantly,the new materials exhibited low water uptake(30 wt%-75 wt%at 80℃)and improved water stability,which were attributed to the acid-base interaction between sulfonic acid and pyridine functional groups. 展开更多
关键词 Sulfonated polyimide Pyridine Acid-base interaction Proton conductivity.:Sulfonated polyimide Pyridine Acid-base interaction Proton conductivity.
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Improvement of HydrophUicity and Blood Compatibility on Polyethersulfone Membrane by Blending Sulfonated Polyethersulfone 认领 引用 被引量：17
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作者 王海涛 杨刘 +2 位作者 赵学辉 于湉 杜启云 《Chinese Journal of Chemical Engineering》 SCIE EI CAS 2009年第2期324-329,共6页
Polyethersulfone(PES) is widely used as biomaterials due to its thermal stability,mechanical strength,and chemical inertness.Nevertheless,their blood compatibility is still not adequate for hemodialysis and blood puri... Polyethersulfone(PES) is widely used as biomaterials due to its thermal stability,mechanical strength,and chemical inertness.Nevertheless,their blood compatibility is still not adequate for hemodialysis and blood purification.In this study,the sulfonated polyethersulfone(SPES) was synthesized through an electrophilic substitution reaction,and PES/SPES blending membranes were prepared.The characterization of the SPES was studied by FTIR.The water adsorption and water contact angle experiments show that the hydrophilicity of PES/SPES blend membrane was improved as for the sulfonate group existing in the SPES.Moreover,PES/SPES blend membrane could effectively reduce bovine serum albumin adsorption and prolong the blood coagulation time compared with the PES membrane,thereby improving blood compatibility. 展开更多
关键词 sulfonated polyethersulfone polyethersulfone hydrophilicity blood compatibility blending
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Sulfonated carbon catalyzed oxidation of aldehydes to carboxylic acids by hydrogen peroxide 认领 引用 被引量：7
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作者 Lipeng Zhou Beibei Dong +4 位作者 Si Tang Hong Ma Chen Chen Xiaomei Yang Jie Xu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2013年第4期659-664,共6页
Sulfonated carbon as a strong and stable solid acid catalyst exhibited excellent catalytic performance in various acid-catalyzed reactions.Here,sulfonated carbon,as catalyst for oxidation reaction,was prepared via the... Sulfonated carbon as a strong and stable solid acid catalyst exhibited excellent catalytic performance in various acid-catalyzed reactions.Here,sulfonated carbon,as catalyst for oxidation reaction,was prepared via the carbonization of starch followed by sulfonation with concentrated sulfuric acid.N2 physisorption,X-ray diffraction,Fourier transform infrared spectroscopy,X-ray fluorescence and acid-base titration were used to characterize the obtained materials.The catalytic activity of sulfonated carbon was studied in the oxidation of aldehydes to carboxylic acids using 30 wt%H2O2 as oxidant.This oxidation protocol works well for various aldehydes including aromatic and aliphatic aldehydes.The sulfonated carbon can be recycled for three times without obvious loss of activity. 展开更多
关键词 aldehyde carboxylic acid oxidation hydrogen peroxide sulfonated carbon
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Proton-Exchange Sulfonated Poly (ether ether ketone) (SPEEK)/SiOx-S Composite Membranes in Direct Methanol Fuel Cells 认领 引用 被引量：6
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作者 高启君 王宇新 +2 位作者 许莉 卫国强 王志涛 《Chinese Journal of Chemical Engineering》 SCIE EI CAS 2009年第2期207-213,共7页
A sulfonated poly（ether ether ketone） （SPEEK） membrane with a fairly high degree of sulfonation （DS） can swell excessively and even dissolve at high temperature. To solve these problems, insolvable functionalize... A sulfonated poly（ether ether ketone） （SPEEK） membrane with a fairly high degree of sulfonation （DS） can swell excessively and even dissolve at high temperature. To solve these problems, insolvable functionalized silica powder with sulfonic acid groups （SiOx-S） was added into the SPEEK matrix （DS = 55.1%） to prepare SPEEK/ SiOx-S composite membranes. The decrease in both the swelling degree and the methanol permeability of the membranes was a dose-dependent result of addition of the SiOx-S powder. Pure SPEEK membrane swelled 52.6% at 80℃, whereas the SPEEK/SiOx-S （15%, by mass） membrane swelled only 27.3% at the same temperature. From room temperature to 80℃, all SPEEK/SPEEK/SiOx-S composite membranes had methanol permeability of about one order of magnitude lower than that ofNafion115. Compared with pure SPEEK membranes, the addition of the SiOx-S powder not only leads to higher proton conductivity, but also increases the dimensional stability at higher temperatures, and greater proton conductivity can be achieved at higher temperature. The SPEEK/SiO4-S （20%, by mass） membrane could withstand temperature up to 145℃, at which in 100% relative humidity （RH） its proton conductivity exceeded slightly that of Nafion 1 15 membrane and reached 0.17 S·cm^-1, while pure SPEEK membrane dissolved at 90℃. The SPEEK/SiOx-S composite membranes are promising for use in direct methanol fuel cells because of their good dimensional stability, high proton conductivity, and low methanol permeability. 展开更多
关键词 sulfonated poly（ether ether ketone） functionalized silica composite membrane direct methanol fuel cell
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Rheological and physicomechanical properties of rod milling sand-based cemented paste backfill modified by sulfonated naphthalene formaldehyde condensate 认领 引用 被引量：4
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作者 Qinli Zhang Hao Wu +3 位作者 Yan Feng Daolin Wang Huaibin Su Xiaoshuang Li 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2023年第2期225-235,共11页
Rod milling sand(RMS)—a coarse sand aggregate—was recycled for cemented paste backfill(CPB)for the underground mined area at the Jinchuan nickel deposit,named rod milling sand-based cemented paste backfill(RCPB).The... Rod milling sand(RMS)—a coarse sand aggregate—was recycled for cemented paste backfill(CPB)for the underground mined area at the Jinchuan nickel deposit,named rod milling sand-based cemented paste backfill(RCPB).The adverse effects of coarse particles on the transportation of CPB slurry through pipelines to underground stopes resulting in weakening of the stability of the backfill system are well known.Therefore,sulfonated naphthalene formaldehyde(SNF)condensate was used for the performance improvement of RCPB.The synergistic effect of solid content(SC),lime-to-sand ratio,and SNF dosage on the rheological and physicomechanical properties,including slump,yield stress,bleeding rate,uniaxial compressive strength(UCS),as well as mechanism analysis of RCPB,have been explored.The results indicate that the effect of SNF on RCPB performance is related to the SNF dosage,lime-to-sand ratio,and SC.The slump of fresh RCPB with 0.1wt%-0.5wt%SNF increased by 2.6%-26.2%,whereas the yield stress reduced by 4.1%-50.3%,indicating better workability and improved cohesiveness of the mix.The bleeding rate of fresh RCPB decreased first and then rose with the increase of SNF dosage,and the peak decrease was 67.67%.UCS of RCPB first increased and then decreased with the increase of SNF dosage.At the optimal SNF addition ratio of 0.3wt%,the UCS of RCPB curing for 7,14 and,28 d ages increased by 31.5%,28.4%,and 29.5%,respectively.The beneficial effects of SNF in enhancing the early UCS of RCPB have been corroborated.However,the later UCS increases at a slower rate.The research findings may guide the design and preparation of RCPB with adequate performance for practical applications. 展开更多
关键词 rod milling sand sulfonated naphthalene formaldehyde condensate cemented paste backfill rheological properties physicomechanical properties
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Semi-interpenetrating polymer networks toward sulfonated poly(ether ether ketone) membranes for high concentration direct methanol fuel cell 认领 引用 被引量：3
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作者 Xupo Liu Yunfeng Zhang +6 位作者 Shaofeng Deng Cuicui Li Jiaming Dong Jiaying Wang Zehui Yang Deli Wang Hansong Cheng 《Chinese Chemical Letters》 SCIE CAS CSCD 2019年第2期299-304,共6页
Low methanol permeability of proton exchange membranes (PEMs) is greatly important for direct methanol fuel cells (DMFCs). Here, sulfonated poly (ether ether ketone) (SPEEK) based semiinterpenetrating polymer networks... Low methanol permeability of proton exchange membranes (PEMs) is greatly important for direct methanol fuel cells (DMFCs). Here, sulfonated poly (ether ether ketone) (SPEEK) based semiinterpenetrating polymer networks (semi-IPNs) are successfully prepared by interpenetrating SPEEK into the in-situ synthesized crosslinking networks. The polymeric networks are formed by the covalent bonds between bromobenzyl groups of bro mo methylated poly (phenylene oxide) and amine groups of diamine linkers as well as the ionic bonds between amine species and sulfonated groups. Two linkers without and with sulfonated groups are applied to fabricate the semi-IPNs. The core properties of the membranes, like phase separation, water uptake, proton conductivity and methanol permeability, are systematically studied and compared. The DMFCs assembled by using the semi-IPN membranes display better performance than Nafion 117 in high concentration methanol solutions. The present work provides a facile way to prepare PEMs with enhanced DMFC performance. 展开更多
关键词 Direct methanol fuel cell Proton exchange membrane Semi-interpenetrating polymer networks Sulfonated poly(ether ether ketone) Bromomethylated poly(phenylene oxide)
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STUDY ON LIGHTLY SULFONATED SYNDIOTACTIC POLYSTYRENE IONOMERS 认领 引用 被引量：3
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作者 Jin Wang Fang-ming Zhu +2 位作者 Jin-cheng Lui Hua-ming Li Shang-an Lin 《Chinese Journal of Polymer Science》 SCIE EI CAS 2001年第3期269-276,共8页
Sulfonated syndiotactic polystyrene ionomers(SsPS)with 1.8 mol%degree of sulfonation have been studied.WAXD shows that the crystallinity of SsPS ionomers was decreased with increasing diameter size of the counter ions... Sulfonated syndiotactic polystyrene ionomers(SsPS)with 1.8 mol%degree of sulfonation have been studied.WAXD shows that the crystallinity of SsPS ionomers was decreased with increasing diameter size of the counter ions and sPS>SsPS-H>SsPS-K>SsPS-Zn.Moreover,SsPS ionomers only have alpha crystal form,while original sPS has two crystal forms:alpha and beta crystal form.TGA shows that the thermal stability of SsPS ionomers is higher than that of the original sPS and SsPS-Zn>SsPS-K>SsPS-H.DSC shows that all the glass transition temperatures(T-g)of SsPS ionomers are higher than that of the neat sPS and SsPS-Zn>SsPS-Na>SsPS-K>SsPS-H.However,the melting temperature(T-m)and crystallization peak temperature(T-p)of SsPS ionomers are lower and SsPS-H>SsPS-Zn>SsPS-K>SsPS-Na,while the crystallinity(X-c)of SsPS-Zn is the lowest.Nonisothermal crystallization kinetics shows that the Avrami index of sPS and SsPS-H are both about 4,suggesting the nucleation growth of SsPS-H with lower degree of sulfonation still keeps its three-dimension form.FTIR spectra of SsPS ionomers show a splitting absorption band for asymmetric stretching vibration of sulfonation group.The CH in-plane bending vibration of benzene ring shifted to higher wavenumber and the symmetric stretching vibration of sulfonation group changed slightly with different counter ion neutralized SsPS ionomers. 展开更多
关键词 sulfonated syndiotactic polystyrene ionomer sulfonation thermal behavior
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Quinone-mediated decolorization of sulfonated azo dyes by cells and cell extracts from Sphingomonas xenophaga 认领 引用 被引量：4
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作者 JIAO Ling LU Hong +1 位作者 ZHOU Jiti WANG Jing 《Journal of Environmental Sciences》 SCIE EI CAS 2009年第4期503-508,共6页
The effects of various quinone compounds on the decolorization rates of sulfonated azo dyes by Sphingomonas xenophaga QYY were investigated.The results showed that anthraquinone-2-sulfonate(AQS)was the most effective ... The effects of various quinone compounds on the decolorization rates of sulfonated azo dyes by Sphingomonas xenophaga QYY were investigated.The results showed that anthraquinone-2-sulfonate(AQS)was the most effective redox mediator and AQS reduction was the rate-limited step of AQS-mediated decolorization of sulfonated azo dyes.Based on AQS biological toxicity tests,it was assumed that AQS might enter the cells and kill them.In the cytoplasmic extracts from strain QYY,AQS more effectively increased decolorization rates of sulfonated azo dyes than other quinone compounds.In addition,we found a NADH/FMN-dependent AQS reductase using nondenaturing polyacrylamide gel electrophoresis(Native-PAGE). 展开更多
关键词 redox mediator sulfonated azo dyes Sphingomonas xenophaga reductase
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Kinetic and thermodynamic studies of the esterification of acidified oil catalyzed by sulfonated cation exchange resin 认领 引用 被引量：10
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作者 Lingling Ma Ying Han +2 位作者 Kaian Sun Jie Lu Jincheng Ding 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2015年第4期456-462,共7页
This study describes the kinetics and thermodynamics of the esterification of acidified oil with methanol catalyzed by sulfonated cation exchange resins（SCER）. The effects of the mass ratio of methanol to acidified ... This study describes the kinetics and thermodynamics of the esterification of acidified oil with methanol catalyzed by sulfonated cation exchange resins（SCER）. The effects of the mass ratio of methanol to acidified oil,reaction temperature,and catalyst loading were studied to optimize the conditions for maximum conversion of free fatty acids（FFAs）. The results showed that the optimal conversion rate of FFAs was 91.87% at the mass ratio of methanol to acidified oil of 2.5：1.0,reaction temperature of 65.0 °C,catalyst loading of 5.0 g and reaction time of 8.0 h. The external and internal mass transfer resistances were negligible based on the experimental results and a pseudo-homogeneous kinetic model was proposed for the esterification. The activation energy and thermodynamic parameters including G,S and H were determined. The conversion rates of FFAs obtained from the established model were in good agreement with the experimental data. 展开更多
关键词 Acidified oil Biodiesel Esterification Pseudo-homogeneous model Sulfonated cation exchange resin
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SYNTHESIS AND PROPERTIES OF SULFONATED POLY(ETHER KETONE)S CONTAINING 3,5-DIMETHYL PHTHALAZINONE MOIETIES AS PROTON EXCHANGE MEMBRANE MATERIALS 认领 引用 被引量：3
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作者 Shou-hai Zhang Juan Zhou Xi-gao Jian 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2012年第4期511-519,共9页
Sulfonated poly(ether ketone)s containing 3,5-dimethyl phthalazinone moieties(SPPEK-DMs)with different degrees of sulfonation(DS)were synthesized via direct polycondensation from 4-(3,5-dimethyl-4-hydroxyphenyl)-2,3-p... Sulfonated poly(ether ketone)s containing 3,5-dimethyl phthalazinone moieties(SPPEK-DMs)with different degrees of sulfonation(DS)were synthesized via direct polycondensation from 4-(3,5-dimethyl-4-hydroxyphenyl)-2,3-phthalazinone,4,4'-difluorobenzophenone and 3,3'-disulfonate-4,4'-difluorobenzophenone.The chemical structure of SPPEK-DMs was characterized by FTIR and 1H-NMR.Thermal stability of SPPEK-DMs was characterized by the thermogravimetric analysis.The membranes prepared from SPPEK-DMs exhibited ion exchange capacities(IEC)ranging from 0.93 mmol.g-1 to 1.86 mmol.g-1.Water uptake,swelling,oxidative stability and methanol permeability of SPPEK-DMs membranes were investigated.SPPEK-DMs membranes exhibited high oxidative stability.The methanol permeability values of SPPEK-DMs membranes were in the range 5.15×10^-8-6.61×10^-7 cm^2.s-1,which was much lower than those of Nafion117.The proton conductivity of SPPEK-DM40 membranes was 1.1×10^-2 S.cm^-1 at 70℃. 展开更多
关键词 Phthalazinone Sulfonated poly(aryl ether ketone) Proton exchange membrane.
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Harvesting Microalgae Biomass Using Sulfonated Polyethersulfone(SPES)/PES Porous Membranes in Forward Osmosis Processes 认领 引用 被引量：1
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作者 ZHOU Qi YANG Yang +4 位作者 WANG Xiaojuan WANG Qun WANG Shuxin GAO Xueli GAO Congjie 《Journal of Ocean University of China》 SCIE CAS CSCD 2020年第6期1345-1352,共8页
This study was performed to investigate the availability of forward osmosis(FO)for microalgae harvesting using sulfonated polyethersulfone(SPES)/PES porous membranes.In FO process,porous membranes(<25.0 L m^−2 h^−1... This study was performed to investigate the availability of forward osmosis(FO)for microalgae harvesting using sulfonated polyethersulfone(SPES)/PES porous membranes.In FO process,porous membranes(<25.0 L m^−2 h^−1)exhibited more superior water flux than TFC FO membranes(<2.6 L m^−2 h^−1).Furthermore,the incorporation of SPES has been demonstrated to enhance membrane performance.The effects of SPES content on pore structure and separation performance were investigated.Compared with pure PES porous membranes,porous membranes with 40%SPES yielded an improved hydrophilicity and greater porosity.It exhibited two times higher water fluxes than the pure PES porous membrane.For microalgae harvesting,AL-FS mode(active layer facing the feed solution)was more favourable than AL-DS mode(active layer facing the draw solution)because less deposited microalgae on the active layer mitigate the membrane biofouling.FO operation combined with SPES/PES porous membranes is conducive to preserving microalgae cell integrity under the mild condition.In addition,FO membrane can be cleaned by a simple water rinse.Potential implications were highlighted as a sustainable method for microalgae harvesting because of no pressure input and less chemical cleaning demand. 展开更多
关键词 forward osmosis porous membrane sulfonated polyethersulfone microalgae harvesting cell integrity
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