| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a solid acid having high ion exchange capacity, catalytic performances and proton conductivity and exhibiting excellent heat resistance, and a solid acid, and to provide a proton-conductive film, a solid acid catalyst, an ion exchange membrane, a membrane electrode assembly (MEA) and a fuel cell using the solid acid. <P>SOLUTION: The solid acid is manufactured in one-step reaction by subjecting an organic compound to a heat treatment in the presence of a polycondensing agent under reduced pressure, where sulfonation and carbonization are simultaneously attained by optimizing the reaction temperature and the pressure condition. Thus, two steps of sulfonation and carbonization required in conventional processes are integrated into one step thereby permitting remarkable reduction in the production cost and production of the solid acid having a high acid value and a high sulfur content. The thus-obtained solid acid is superior in catalytic performances, ion exchange performances and proton conductivity to those obtained by conventional two-step methods. <P>COPYRIGHT: (C)2007,JPO&INPIT |
