膜
砜
高分子化学
Nafion公司
乙醚
材料科学
甲醇
酮
选择性
芳基
傅里叶变换红外光谱
化学
有机化学
化学工程
催化作用
物理化学
电化学
工程类
生物化学
烷基
电极
作者
Chengyun Yuan,Yinghan Wang
标识
DOI:10.1177/0954008320960216
摘要
A novel sulfonated polyvinyl alcohol containing alkynyl groups (SPVA-C≡C) and a new sulfonated poly (aryl ether ketone sulfone) (SPAEKS) are synthesized. Semi-crosslinked membrane (semi-crosslink-SPAEKS-x) was prepared by click reaction of mercapto-alkynes between 1, 5-pentanedithiol and SPVA-C≡C. The chemical structures of SPAEKS, SPVA-C≡C and semi-crosslink-SPAEKS-x are confirmed by 1 H-NMR and FTIR spectra. The semi-crosslink-SPAEKS-x membranes show good mechanical properties, excellent dimensional stability and oxidative stability. The proton conductivity of SPAEKS and semi-crosslink-SPAEKS-x membranes is in the range of 25.6–52.5 mS/cm. The methanol permeability of semi-crosslink-SPAEKS-x membranes is in the range of 1.4–1.7 × 10 −7 cm −2 s −1 , which is much lower than that of Nafion 117 membrane (18.3 × 10 −7 cm −2 s −1 ). Especially, the proton selectivity of semi-crosslink-SPAEKS-15 membrane (24.3 × 10 4 S s cm −3 ) is above seven times higher than that of Nafion 117 membrane (3.4 × 10 4 S s cm −3 ).
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