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嵌段磺化聚芳醚砜阳离子交换膜的制备及在MFC中的发电性能研究

DOI: 10.3724/SP.J.1105.2014.13348, PP. 657-663

Keywords: 微生物燃料电池,嵌段磺化聚芳醚砜,产电性能

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Abstract:

采用嵌段共聚制备了具有不同链段长度的非磺化/磺化多嵌段型磺化聚芳醚砜阳离子交换膜(bSPAES),研究了bSPAES膜在微生物燃料电池(MFC)作为分离膜的性能.由于在亲水磺化部分引入了刚性更强的芴结构,bSPAES膜表现了更好的尺寸稳定性和水解稳定性.链段长度控制在10~30的bSPAES膜在30℃水中的尺寸变化表现为各向同性,介于10%~20%之间.bSPAES膜的质子导电率为81~140mS/cm,远超过商用的ULTREXCMI-7000.经过1000hMFC运行后,bSPAES膜电导率几乎没有发生降低.100℃24h高温水稳定性试验表明,bSPAES膜的失重率仅在1.5%~6.3%之间.MFC最大功率密度也随着bSPAES中链段长度的增加而提高,链段长度为15~30的bSPAES膜的MFC产电性能优于商用ULTREXCMI-7000膜,bSPAES(30/30)膜在MFC中的最大功率密度达到705mW/m2.

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