Preparation of Microporous Polypropylene Membrane via Thermally Induced Phase Separation as Support of Liquid Membranes Used for Metal Ion Recovery

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Douglas R. Lloyd¹  Sheng Sheng Fu²  Masaaki Teramoto²  Hideto Matsuyama² 

[1] Department of Chemical Engineering, University of Texas at Austin;Department of Chemistry and Material Technology, Kyoto Institute of Technology

关键词: Microporous Mmembrane;    Thermally-Induced Phase Separation;    Polypropylene;    Supported Liquid Membrane;    Uphill Transport;   

DOI  :  10.1252/jcej.36.1397

来源: Maruzen Company Ltd

【 摘 要 】

References(24)Cited-By(2)Microporous polypropylene (PP) membranes were prepared by the thermally induced phase separation (TIPS) technique and used as supports of liquid membranes. Several different quenching temperatures were used in the preparation of the microporous membranes. Membranes prepared by air-cooling and quenching in a water bath of 353 K showed higher porosity at the membrane surface compared with those made by quenching in a water bath of 303 K and in ice-water. A simplified one-dimensional heat transfer equation was solved to evaluate the temperature profile within the membrane to demonstrate the effect of quenching temperature on the final pore size distribution. The calculated result suggested that the asymmetric membrane structure formed by quenching in 303 K water and ice-water was not attributable to the temperature gradient.Supported liquid membranes (SLMs) were prepared by impregnating a carrier solution in the prepared porous polypropylene membranes, and uphill transport of Ce(III) was investigated using octyl(phenyl)-N,N-diisobutyl-carbamoyl-methylphosphine oxide (CMPO) as a carrier, tributyl phosphate (TBP) as a modifier, and dodecane as a solvent. The membranes prepared by air-cooling showed higher permeability of Ce(III) than the commercial membrane.

【 授权许可】

Unknown