| Summary: | 碩士 === 國立雲林科技大學 === 化學工程與材料工程系碩士班 === 100 === In this study, a series of Sulfonated polyimide/ Sulfonic poly (vinyl alcohol) (SPI/SPVA) polymer blend and semi-interpenetrating networks of sulfonated polyimide/ Sulfonic poly (vinyl alcohol) polymer (SIPN20) proton exchange membranes were successfully synthesized. SPI was blended with SPVA to obtain SPI/SPVA blend membranes. The networks structure of SPVA was created by crosslinking reaction of immersing SPI/SPVA20 membrane in 1vol% glutaraldehyde solution. By controlling crosslinking time, different crosslinking degree of SIPN20 membranes can be obtained.
The structure-property relationship of proton exchange membranes is discussed according to the chemical structure of the various content and crosslinking degree of SPVA in the SPI/SPVA polymer blend and SIPN20 proton exchange membranes from the viewpoints of thermal stability, water uptake, dimension stability, proton conductivity, oxidation stability and proton exchange membrane fuel cell (PEMFC) performance. The results showed that incorporation of the SPVA in membrane increases its hydrophilic functiona to enhance the moisture content of the membrane, increase the proportion of unfreezable water and improve water retention capacity, while the semi-interpenetrating network structure to enhance the proton exchange membrane oxidation stability and hydrolytic stability. The proton conductivity of the SIPN20-12.08 (182mS/cm) is higher than that of Nafion212 (100mS/cm). The SIPN20-12.08 has excellently. Therefore, sulfonated polyimide / sulfonic polyvinyl alcohol semi-interpenetrating network structure is a quite suitable matertal as the proton exchange membrane used in PEMFC.
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