Proton conducting membranes based on blends of PBI with aromatic polyethers containing pyridine units

被引:83
作者
Daletou, MK
Gourdoupi, N
Kallitsis, JK [1 ]
机构
[1] Univ Patras, Dept Chem, Patras 26500, Greece
[2] FORTH, Inst Chem Engn & High Temp Chem Proc, Patras, Greece
关键词
polymer electrolyte membranes; polymer blends; oxidative stability; PBI; polysulfone copolymers;
D O I
10.1016/j.memsci.2004.11.023
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
New aromatic copolymers bearing polar pyridine units in the main chain have been synthesized. Depending on the content of the pyridine monomer, soluble, high molecular weight polymers were obtained. The studied copolymers showed high thermal and oxidative stability and high T-g values but moderate ability to be doped with phosphoric acid. Blends with polybenzimidazole were prepared in order to further improve the acid uptake and subsequently reach the desired conductivity values. Depending on the copolymer and blend composition, phase separated or miscible pairs were obtained as was found based on the single glass transition criterion. The thermal and oxidative stability of these blends were also tested. Even the membranes with high PBI content retained their flexibility and good mechanical properties after the treatment with H2O2, indicating the high oxidative stability of the system. Doping with phosphoric acid at various conditions resulted in ionically conducting membranes, with conductivity in the range of 10(-2) S/cm, a prerequisite for use of these materials in fuel cells operating above 100 degrees C. (c) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:115 / 122
页数:8
相关论文
共 28 条
[1]  
Aricò AS, 1998, ELECTROCHEM SOLID ST, V1, P66, DOI 10.1149/1.1390638
[2]   FTIR spectroscopic investigation of inorganic fillers for composite DMFC membranes [J].
Arico', AS ;
Baglio, V ;
Di Blasi, A ;
Antonucci, V .
ELECTROCHEMISTRY COMMUNICATIONS, 2003, 5 (10) :862-866
[3]   Proton conduction in acid doped polybenzimidazole [J].
Bouchet, R ;
Siebert, E .
SOLID STATE IONICS, 1999, 118 (3-4) :287-299
[4]   Miscibility behavior of polybenzimidazole/sulfonated polysulfone blends for use in fuel cell applications [J].
Deimede, V ;
Voyiatzis, GA ;
Kallitsis, JK ;
Qingfeng, L ;
Bjerrum, NJ .
MACROMOLECULES, 2000, 33 (20) :7609-7617
[5]   Novel proton-conducting polyelectrolyte composed of an aromatic polyether containing main-chain pyridine units for fuel cell applications [J].
Gourdoupi, N ;
Andreopoulou, AK ;
Deimede, V ;
Kallitsis, JK .
CHEMISTRY OF MATERIALS, 2003, 15 (26) :5044-5050
[6]   Fuel cell materials and components [J].
Haile, SM .
ACTA MATERIALIA, 2003, 51 (19) :5981-6000
[7]  
Haile SM., 2003, MATER TODAY, V6, P24, DOI [DOI 10.1016/S1369-7021(03)00331-6, 10.1016/S1369-7021(03)00331-6]
[8]   New polymer electrolytes based on blends of sulfonated polysulfones with polybenzimidazole [J].
Hasiotis, C ;
Deimede, V ;
Kontoyannis, C .
ELECTROCHIMICA ACTA, 2001, 46 (15) :2401-2406
[9]   Development and characterization of acid-doped polybenzimidazole/sulfonated polysulfone blend polymer electrolytes for fuel cells [J].
Hasiotis, C ;
Qingfend, L ;
Deimede, V ;
Kallitsis, JK ;
Kontoyannis, CG ;
Bjerrum, NJ .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2001, 148 (05) :A513-A519
[10]   EPR investigation of HO. radical initiated degradation reactions of sulfonated aromatics as model compounds for fuel cell proton conducting membranes [J].
Hübner, G ;
Roduner, E .
JOURNAL OF MATERIALS CHEMISTRY, 1999, 9 (02) :409-418