Formation of Biodegradable Polyesters Membranes via Thermally Induced Phase Separation

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Douglas R. Lloyd¹  Takashi Tsuchiya³  Hitomi Ohara²  Masayuki Taniguchi³  Takaaki Tanaka³  Hidema Takahashi³ 

[1] Department of Chemical Engineering, The University of Texas at Austin;Bio-Plastic Project Department, Toyota Motor Co.;Department of Materials Science and Technology, Niigata University

关键词: Biodegradable Polyesters;    Microporous Membrane;    Thermally Induced Phase Separation;    Poly(L-Lactic Acid);    Poly(ε-Caprolactone);   

DOI  :  10.1252/jcej.39.144

来源: Maruzen Company Ltd

【 摘 要 】

References(35)Cited-By(17)Microfiltration membranes that can be composted after service were developed from biodegradable polyesters, poly(L-lactic acid) (PLLA) and poly(ε-caprolactone) (PCL). The membranes were formed via the thermally induced phase separation method. A 10 wt% PLLA solution in a mixed diluent of 1,4-dioxane and water (87:13 by weight) was prepared in a flat mold and quenched from 52°C (4°C above cloud point temperature) to 0°C. After diluent extraction, the membrane separated yeast cells (6 μm) from their suspensions. A PCL membrane formed by the same method did not reject yeast cells. PCL membranes formed by quenching a 16 wt% PCL solution to 0°C and quenching a 10 wt% PCL solution to –196°C did separate yeast cells from their suspensions. The permeation flux was much higher in the filtration of 1 kg·m–3 yeast cell suspension with the PLLA and PCL membranes formed by quenching a 10 wt% PLLA or PCL solution to –196°C than in the filtration with the PLLA membrane formed by quenching a 10 wt% PLLA solution to 0°C. The higher flux would be due to the lower resistance of the membranes formed by liquid nitrogen quenching (–196°C) and the mode of depth filtration. Porous biodegradable microfiltration membranes prepared from these polymers have the potential to serve as disposable filters in food and biochemical industries.

【 授权许可】

Unknown