Effect of Alcohol Solvents for Glycidyl Methacrylate in Radiation-Induced Graft Polymerization on Performance of Cation-Exchange Porous Membranes.
Effect of Alcohol Solvents for Glycidyl Methacrylate in Radiation-Induced Graft Polymerization on Performance of Cation-Exchange Porous Membranes.
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辐射诱导接枝聚合中甲基丙烯酸缩水甘油酯的醇溶剂对阳离子交换多孔膜性能的影响。
DOI：
10.5360/membrane.27.196
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
T. Sugo
中科院分区：
文献类型：
--
作者：
Daisuke Okamura;Kyoichi Saito;K. Sugita;M. Tamada;T. Sugo
采用辐射接枝聚合法，在聚乙烯中空纤维膜上接枝甲基丙烯酸缩水甘油酯（GMA）。四种酒精，即，甲醇、乙醇、1-丙醇和1-丁醇用作GMA的溶剂。GMA的接枝率随醇的碳数增加而降低。接枝度为90或120%的GMA接枝膜的环氧基以10至12%的摩尔转化率转化为磺酸基。将鸡卵溶菌酶（HEL）溶于pH9.0的碳酸盐缓冲溶液中，通过不同醇类溶剂制备的含磺酸基的中空纤维膜，使HEL透过膜孔。当进料浓度为0. 5g-HEL/L时，HEL在膜上的平衡结合量随醇的碳数增加而增加。例如，用甲醇和1-丁醇制备的膜的结合容量分别为0.18和0.38 g-HEL/g-膜。相反，蛋白质溶液的通量随着醇的碳数的增加而降低。这表明在用较高碳数的醇作为GMA的溶剂制备的膜的孔表面上形成较长的聚合物刷。
An epoxy-group-containing monomer, glycidyl methacrylate (GMA), was grafted onto a porous hollow-fiber membrane made of polyethylene, by radiation-induced graft polymerization. Four kinds of alcohol, i.e., methanol, ethanol, 1-propanol, and 1-butanol, were employed as the solvents for GMA. Grafting rate of GMA was decreased with increasing carbon number of alcohols. The epoxy group of the GMA-grafted membrane with a degree of grafting of 90 or 120% was converted to a sulfonic acid group at a molar conversion of 10 to 12%. Hen-egg lysozyme (HEL) dissolved in carbonate buffer solution (pH 9.0) was forced to permeate through the pores of the sulfonic-acid-group-containing porous hollow-fiber membranes prepared with various alcohol solvents. The binding capacity of HEL onto the membrane in equilibrium with the feed concentration of 0.5 g-HEL/L increased with the increase in the carbon number of alcohols. For example, the binding capacities of the membranes prepared with methanol and 1-butanol were 0.18 and 0.38 g-HEL/g-membrane, respectively. In contrast, the flux of the protein solution was decreased with increasing carbon number of alcohols. This demonstrates that longer polymer brushes are formed on the pore surface of the membrane prepared with a higher carbon number of alcohol employed as the solvent for GMA.