EFFECT OF ORGANIC-SOLVENTS AS GELATING AGENTS ON PERFORMANCE OF CHITOSAN MEMBRANES FOR ULTRAFILTRATION

被引：3

作者：

BEPPU, M ^{[1
]}

BABA, T ^{[1
]}

KAMIZAWA, C ^{[1
]}

机构：

[1] NATL CHEM LAB IND,TSUKUBA,IBARAKI 305,JAPAN

来源：

KOBUNSHI RONBUNSHU | 1993年 / 50卷 / 01期

关键词：

CHITOSAN; MEMBRANE; ULTRAFILTRATION; GELATING AGENT; GELATION; HEAT OF MIXING; FLUIDITY; WATER FLUX; REJECTION; MEMBRANE STRUCTURE;

D O I：

10.1295/koron.50.35

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Chitosan membranes for ultrafiltration were prepared by the phase inversion method with an aqueous solution of acetic acid as the solvent. In order to improve the membrane performance, various organic solvents were employed as the gelating agents. Their effects on the membrane formability and performance were investigated from the viewpoint of their behaviors in gelating processes. The gelating agents showing good membrane formability could be grouped into two groups depending on the heat change obtained by mixing chitosan solution and gelating agent. The agents showing endothermic change in the case of mixing formed tight membranes and the agents showing exothermic change formed loose membranes. Further, the agents having the higher fluidity formed the looser membranes among the exothermic gelating agents. These results suggest that the affinity for water of the gelating agent as well as the relative exchange rates between water in chitosan-rich phase and the gelating agent play important roles as determinants for the membrane performance.

引用

页码：35 / 40

页数：6

共 3 条

[1] RATIONALE FOR PREPARATION OF LOEB-SOURIRAJAN-TYPE CELLULOSE ACETATE MEMBRANES [J].