SULFONATED POLYIMIDES CONTAINING PYRIDINE GROUPS AS PROTON EXCHANGE MEMBRANE MATERIALS

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...

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Published inChinese journal of polymer science Vol. 29; no. 5; pp. 532 - 539
Main Authors Lei, Rui, Kang, Chuan-qing, Huang, Yun-jie, Qiu, Xue-peng, Ji, Xiang-ling, Xing, Wei, Gao, Lian-xun
Format Journal Article
LanguageEnglish
Published Heidelberg Chinese Chemical Society and Institute of Chemistry, CAS 01.09.2011
Subjects
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Industrial Chemistry/Chemical Engineering
Polymer Sciences
二氨基二苯醚
吡啶
氨基苯基
直接缩聚
磺化聚酰亚胺
膜材料
质子交换
质子传导率
Acid-base interaction
Proton conductivity
Pyridine
Sulfonated polyimide
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Summary: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.
Bibliography: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.
Sulfonated polyimide; Pyridine; Acid-base interaction; Proton conductivity. ： Sulfonated polyimide; Pyridine; Acid-base interaction; Proton conductivity.
11-2015/O6
ISSN:0256-7679
1439-6203
DOI:10.1007/s10118-011-1063-5