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Preparation of poly(lactic acid)membrane via complexphase separations based on water-solubility diluent

Authors： YANG Shangang, YE Hui, ZHANG Yuzhong*,ZHAO Lizhi, SHAN Timei, LI Hong

Units： School of Material Science and Engineering, Tianjin Polytechnic University Tianjin 300387；State Key laboratory of Hollow Fiber membrane Materails and Membrane Process, Tianjin Polytechnic University, Tianjin300387,China

KeyWords： Poly(lactic acid) membrane ;complex phase separation; biodegradable; water-solubility diluent;

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2014,34(6):28-34

Abstract：

In this paper, based on water-solubility diluent (DMSO), biodegradable poly (lactic acid) membrane was prepared via complex phase separation. The effect of coagulation bath temperature, casting solution temperature as important factors on structure and performance of membrane were investigated. The results showed that when coagulation bath temperature was near to cloud point temperature, the effect of NIPs was dominating. The prepared membranes possess the structure of fingerlike pores and macrovoids with low flux and high the retentions of BSA. When coagulation bath temperature was lower than cloud point temperature, complex phase separation occurred in the phase separation process. The prepared membranes possess the structure of fingerlike pores and interconnected bicontinuous structure with high water flux and lower the retentions of BSA. The retentions of BSA was above 66% .When casting solution temperature was near to cloud point temperature, complex phase separation occurred in the phase separation process. The prepared membranes possess porous skin layer, good connectivity between membrane pores and support layer. With the increase of casting solution temperature, the membrane pore size decreased and the water flux decreased sharply from 610 L/（h•m2）to 27.6 L/（h•m2）. The retentions of BSA increased from 61%to 84%.

Funds：

国家自然科学基金项目（50973083；51373120；51173132；21204064）；天津市应用基础及前沿技术研究计划重点项目(11JCZDJC21200);

AuthorIntro：

杨山港（1987—），男，天津市宝坻人，在读硕士研究生，师从张玉忠教授，主要从事聚乳酸分离膜的制备研究；

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