Formation of poly(L-lactic acid) microfiltration membranes via thermally induced phase separation

被引：84

作者：

Tanaka, T ^{[1
]}

Lloyd, DR

机构：

[1] Niigata Univ, Dept Mat Sci & Technol, Niigata 9502181, Japan

[2] Univ Texas, Dept Chem Engn, Austin, TX 78712 USA

来源：

JOURNAL OF MEMBRANE SCIENCE | 2004年 / 238卷 / 1-2期

基金：

日本学术振兴会;

关键词：

poly(L-lactic acid); microfiltration membrane; phase separation; biodegradable plastics; permeability;

D O I：

10.1016/j.memsci.2004.03.020

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Microfiltration membranes of poly(L-lactic acid) (PLLA) were prepared from PLLA-1,4-dioxane-water solutions via the thermally induced phase separation process. Ternary phase diagrams for this system, determined at 10, 48, and 80 C, indicate that essentially polymer-free droplets form in a matrix phase of PLLA-1,4-dioxane-water solution. Rapid solidification of the PLLA after the initial liquid-liquid phase separation was necessary to obtain membranes with open pores at the membrane surface and low permeation resistance. Using filtration of cell suspensions, the effective pore size of the best membrane formed in this study was found to be between 0.6 and 4.4 mum. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：65 / 73

页数：9

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