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PREPARATION AND CHARACTERIZATION OF AMIDATED PECTIN BASED POLYMER ELECTROLYTE MEMBRANES

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Chinese Journal of Polymer Science 2009年第5期27卷 639-646页

作者： R.K.Mishra A.Anis S.Mondal M.Dutt A.K.Banthia Department of Polymer Science Bundelkhand University Materials Science Center Indian Institute of Technology Department of Polymer Science Bundelkhand University

The work presents the synthesis and characterization of amidated pectin(AP) based polymer electrolyte membranes(PEM) crosslinked with glutaraldehyde(GA).The prepared membranes are characterized by Fourier transform infrared spectroscopy(FTIR),organic elemental analysis,X-ray diffraction studies(XRD),thermogravimetric analysis (TGA) and impedance *** properties of the membranes are evaluated by tensile *** degree of amidation(DA),molar and mass reaction yields(Y_M and K_N) are calcu...

关键词： Amidated pectin Proton conducting methanol permeability Impedance spectroscopy Fuel cell.

Proton Conducting Composite Membranes from Sulfonated Polyether Ether Ketone and SiO_2

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Journal of Wuhan University of Technology(Materials Science) 2009年第1期24卷 95-99页

作者：张高文 College of Chemistry and Environment Hubei University of Technology

Proton conducting composite membranes from sulfonated polyether ether ketone and SiO2 for direct methanol fuel cell （DMFC） application were prepared with sulfonated polyether ether ketone（SPEEK） and tetracethoxy silane（TEOS） by sol-gel method. The covalent crosslinking structure was formed between —SO3H of SPEEK via SiO2. The SEM images show that the interfacial compatibility of SPEEK and SiO2 is improved obviously and SiO2 disperses uniformly in the polymer matrix and the particle diameter of SiO2 does not exceed 40 nm. The proton conductivity of composite membranes decreases slightly compared with the SPEEK membrane while the methanol permeability and swelling of composite membrane are improved remarkablely owing to covalent cross-linking between —SO3H and SiO2 .

关键词： direct methanol fuel cell sulfonated polyether ether ketone sol-gel method proton conductivity methanol permeability

Effect of Sulfonation Degree on Performance of Proton Exchange Membranes for Direct methanol Fuel Cells

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Chemical Research in Chinese Universities 2016年第2期32卷 291-295页

作者： XIANG Zheng ZHAO Xueping GE Junjie MA Shuhua ZHANG Yuwei NA Hui Alan G. MaeDiarmid Institute College of Chemistry Jilin University Changchun 130012 P. R. China State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials School of Chemistry and Chemical Engineering University of Jinan Jinan 250022 P. R. China

A series of proton exchange membranes based on sulfonated polyarylene ether ketones（SPAEKs） was used to study the effect of sulfonation degree on proton conductivity, methanol permeation and performance of direct methanol fuel cells（DMFCs）. Dependences of physical characteristics of the membranes, i. e., proton conductivity, water uptake, swelling ratio, methanol permeability and ion exchange capacity（IEC） were systematically studied. Both methanol permeability and proton conductivity of the SPAEK membrane grow rapidly as the increase in sulfonation degree since methanol molecules and protons share the same transfer channel. However, the methanol permeability plays more important role comparing to proton conductivity. As a result, the SPAEK membrane with a medium sulfonation degree（60%） was found to yield the best performance in a DMFC due to the acquirement of balanced conductivity and methanol permeability.

关键词： Fuel cell Sulfonation degree Proton exchange membrane methanol permeability

Preparation and properties of composite membrane of bisphenol A-based sulfonated poly(arylene ether sulfone)and phosphotungstic acid for proton exchange membranes

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Journal of Harbin Institute of Technology(New Series) 2010年第5期17卷 636-640页

作者：张妮刘惠玲李君敬夏至 State Key Laboratory of Urban Water Resources and Environment School of Municipal and Environmental EngineeringHarbin Institute of Technology

A series of bi A-SPAES(Ds=0.4)/phosphotungstic acid(PWA/bi A-SPAES)composite membranes with various contents of PWA were prepared and characterized by *** electron microscopy(SEM)images indicated the PWA were well dispersed within polymer *** composite membranes were evaluated for proton exchange membranes(PEM)in direct methanol fuel cell(DMFC).These membranes showed good thermal *** was found that the water uptake of these membranes increased with the increase of the PWA content in the hybrid ***,the introduction of inorganic particles increased both the proton conductivity and the methanol *** proton conductivities of composite membranes were increased from 0.017 S/cm to 0.045 S/cm at 20 ℃ and from 0.054 S/cm to 0.093 S/cm at 100 ℃ with the increase of PWA content from 0 to 50 %.Especially,all the methanol diffusion coefficients(4.20×10-8-1.05×10-7cm2/s)of bi A-SPAES/PWA hybrid membranes are much lower than that of Nafion 117 membrane(2.1×10-6 cm2/s).Bi A-SPAES/PWA hybrid membranes were therefore proposed as candidates of material for PEM in DMFC.

关键词： bi A-SPAES PWA DMFC proton conductivity methanol permeability

Novel side-chain type poly(arylene ether sulfone)s containing pendant sulfonic aid groups as proton exchange membrane

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Novel side-chain type poly(arylene ether sulfone)s containin...

甲醇燃料电池用磺化苯并噁嗪树脂的合成与性能研究

中国化学会第30届学术年会

作者： Zhihui Fan Yajun qin Ruiqiang Wang Pei Chen Xinbing Chen Zhongwei An Key Laboratory of Applied Surface and Colloid Chemistry (MOE) School of Materials Science and Engineering Shaanxi Normal University

Novel difluoro aromatic ketone monomer,(2,6-difluorophenyl)[3-[(3,5-dimethoxyphenyl)methyl]-5-methoxyphenyl] methanone(DFDM), is prepared via three-step reactions, including nucleophilic addition reaction between 2,6-difluorobenzonitrile and 3-methoxy-5-methylphenyl magnesium bromide, bromonation reaction and palladium catalyzed Suzuki coupling reaction. Series of DFDM-based poly(arylene ether sulfone)s(PAES(x/y)) bearing multiple pendant methoxyphenyl groups are synthesized via polycondensation reaction of 4,4’-biphenol(BP), 4,4’-difluorodiphenyl sulfone(DFDPS) and DFDM in DMSO, where feed ratio of DFDPS to DFDM varies from 1/1 to 1/2. For comparision, a series of crosslinkable DFDM-based PAES(x/y/z) are prepared via copolymerization of BP, DFDPS, 2,6-difluorobenzil(DFB, crosslinkable difluoro monomer), and DFDM, where feed ratio of DFDPS/DFB/DFDM varies from 0.5/0.5/1 to 0.5/0.5/2. The desired novel side-chain type poly(arylene ether sulfone)s containing pendant sulfonic aid groups(s-SPAES(x/y) or s-SPAES(x/y/z)) are obtained by demethylation with boron tribromide and nucleophilic substitution with 1,4-butane sultone. The corresponding crosslinked membranes(cs-SPAES(x/y/z)) are successfully obtained by the cyclocondensation reaction of the benzil moieties in polymer chain with 3,3’-diaminobenzidine(DAB) to form quinoxaline groups acting as covalent and acid–base ionic crosslinking. The properties of PEMs, such as hydroxide conductivity, size change, water uptake, oxidative and chemical stabilities, are investigated in detail. The PEMs display nearly isotropic membrane swelling and acceptable high oxidative stability. It is noted that s-SPAES(x/y) membranes have high proton conductivity in the range of 162–208 m S/cm at 80 oC, taking into consideration of their relatively low IECs of 1.51–1.88 mequiv/g. The dense distribution of the pendant sulfonic aid groups is probably responsible for the good hydroxide conductivity. Meanwhil, the crosslinked membranes show the

关键词： Proton exchange membrane side-chain type poly(arylene ether sulfone) proton conductivity methanol permeability oxidative stability

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甲醇燃料电池用磺化苯并噁嗪树脂的合成与性能研究

直接甲醇燃料电池用PWA/Y2O3/SPEEK复合质子交换膜阻醇性能研究

2014年全国高分子材料科学与工程研讨会

作者：姚丙建李家作耿鹏飞魏严泽曹允灿鲁在君特种功能聚集体材料教育部重点实验室山东大学化学与化工学院

＜正＞在各种燃料电池中,与氢气相比,甲醇常温下为液态、便于携带、电化学活性高、廉价易得,因此直接使用甲醇水溶液为燃料的直接甲醇燃料电池成为目前研发的热点。但是,目前广泛使用的杜邦公司Nafion（磺化聚四氟乙烯）质子交换膜甲醇... 详细信息

＜正＞在各种燃料电池中,与氢气相比,甲醇常温下为液态、便于携带、电化学活性高、廉价易得,因此直接使用甲醇水溶液为燃料的直接甲醇燃料电池成为目前研发的热点。但是,目前广泛使用的杜邦公司Nafion（磺化聚四氟乙烯）质子交换膜甲醇透过很严重,而且成本高昂。为了解决这些问题,国内外积极开展了非氟磺化芳香族聚合物的研究,例如

关键词： sulfonated polybenzoxazine methanol permeability toughness fuel cell

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直接甲醇燃料电池用PWA/Y2O3/SPEEK复合质子交换膜阻醇性能研究