辐照三嵌段聚苯乙烯-丁二烯-4-乙烯基吡啶共聚物离子交换膜性能的研究——Ⅱ.共聚物膜的基本性能及分离实验

 本文研究了以辐照聚苯乙烯-丁二烯-4-乙烯基吡啶嵌段共聚物为膜基体所制成的嵌镶离子交换膜的基本性能.研究表明所制备的嵌镶膜在两端浓度分别为0.1及0.001 mol/L KCl 中的水渗析系数及电解质渗析系数分别是2.40×10^-5mol/cm²·min及2.10×10^-8mol/cm²·s.用所制备的嵌镶离子交换膜测试了牛血清白蛋白(M=67,000)与KCl混合溶液,蔗糖(M=343)与KCl混合溶液的膜分离效果.实验表明对上述两种非电解质均不能通过膜、而电解质KCl则可以.上述两种混合溶液中KCl渗透系数分别为J_KCl(牛血清白蛋白)=1.08×10^-8mol/cm²·s及J_(KCl)(蔗糖)=1.10×10^-8mol/cm²·s.

PROPERTIES OF ION-EXCHANGE MEMBRANE FROM IRRAD- IATED POLY (STYRENE-BUTADIENE-4-VINYLPYRIDINE) TRIBLOCK COPOLYMER II. PREPARATION

In present paper, the properties of charge-mosaic membrane prepared from irradiated poly(styrene-butadiene-4-vinylpyridine) triblock copolymer were investigated. The results showed that the fluxes of water and electrolyte through the membrane are 2.40×10^-5 mol/cm^-3 min, and 2.10×10^-3 mol/cm^-2 sec respectively when the concentrations of KCl are 0.1 mol/1 and 10-3 mol/1 on the two sides of membrane. Experimental results of separation showed that charge-mosaic membrane has better dialysis properties for permeation to salt but not to high mole-cular weight or low molecular weight non-electrolytes.For mixed solution of KCl and protein,KCl and sucrose,the fluxes of KCl are 1.07×10^-8 mol/cm²sec and 1.10×10^-8 mol/cm²sec respectively.