MsISIMs五嵌段镶嵌荷电膜的研制

Preparation of charge-mosaic composite membrane frompoly(4-methylstyrene-isoprene-styrene-isoprene-4-methylstyrene) pentablock copolymer

以五嵌段聚合物ＭｓＩＳＩＭｓ为原料、ＰＰ微孔膜为基膜制备复合膜，再经化学改性而制成一种新型镶嵌荷电膜．测试结果表明，该膜具有精细的微观相分离结构，由阴离子交换区域、中性区域、阳离子交换区域交替排列组成，其阴、阳离子交换区域尺寸约为０．０１μｍ，十分有利于提高离子迁移效率和分离效果；该膜的膜面电阻为９．７×１０２Ω·ｃｍ２，电压渗析系数值β＝１．４×１０－９Ｖ／Ｐａ；基膜的接触角θ＝９８°；而荷电复合膜的θ＝６９°；表明该膜具备典型的镶嵌荷电膜特点．

A new charge-mosaic composite membrane composed of cation and anion permeable domains was prepared.Poly(4-methylstyrene-isoprene-styrene-isoprene-4-methylstyrene) pentablock copolymer, the precursor of the charge-mosaic membrane,was dissolved in benzene,and then casted on a polypropylene microporous supporting membrane. After a series of chemical reactions of crosslinking,chlorization, quaternisation, and sulfonation,the new charge-mosaic composite membrane was obtained. The membrane morphology, structure, and property were studied.