发明名称 |
PROCESS FOR PRODUCING POLYMERIC FILMS FOR USE AS FUEL CELLS |
摘要 |
A method for producing polymeric, e.g., polybenzimidazole (PBI) films, is provided by forming a porous membrane by coagulating a polymeric dope solution in a liquid coagulation bath containing a non-solvent alone or a mixture of a non-solvent and solvent; submerging the resulting membrane into a non-solvent bath to remove any residual solvent; placing the membrane into an acid solution, whereby the pores become filled with the acid solution; and drying the membrane to remove residual non-solvent which collapses the porous structure entrapping the acid and forming a dense film. An alternative method involves coagulating said polymer solution directly into an acid/solvent/non-solvent mixture to produce a porous membrane which imbibes the acid solution, followed by drying. |
申请公布号 |
EP0954544(B1) |
申请公布日期 |
2002.03.27 |
申请号 |
EP19970911615 |
申请日期 |
1997.09.29 |
申请人 |
CELANESE VENTURES GMBH |
发明人 |
SANSONE, MICHAEL, J.;ONORATO, FRANK, J.;FRENCH, STUART, M.;MARIKAR, FARUQ |
分类号 |
C08J5/18;C08J5/22;C08J7/02;C08L79/00;H01M2/16;H01M8/02;H01M8/10 |
主分类号 |
C08J5/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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