Effect of Diluent on the Morphology and Performance of IPP Hollow Fiber Microporous Membrane via Thermally Induced Phase Separation

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Effect of Diluent on the Morphology and Performance of IPP Hollow Fiber Microporous Membrane via Thermally Induced Phase
Separation

YANGZhensheng^a,b;LIPingli^a; CHANGHeying^a; WANGShichang^a

^aSchool of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
^b School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China

Received:1900-01-01 Revised:1900-01-01 Online:2006-06-28 Published:2006-06-28
Contact: YANG Zhensheng

热致相分离法iPP中空纤维微空膜结构与性能——稀释剂的作用

杨振生^a,b;李凭力^a; 常贺英^a; 王世昌^a

^a School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
^b School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China

通讯作者: 杨振生

Abstract

Abstract: Isotactic polypropylene (iPP) hollow fiber microporous membranes were prepared using thermally induced phase separation (TIPS) method. Di-n-butyl phthalate (DBP), dioctyl phthalate (DOP), and the mixed solvent were used as diluents. The effect of α (DOP mass fraction in diluent) on the morphology and performance of the hollow fiber was investigated. With increasing α, the morphology of the resulting hollow fiber changes from typical cellular structure to mixed structure, and then to typical particulate structure. As a result, the permeability of the hollow fiber increases sharply, and the mechanical properties of the hollow fiber decrease obviously. It is suggested that the morphology and performances of iPP hollow fiber microporous membrane can be controlled via adjusting the compatibility between iPP and diluent.

Key words: thermally induced phase separation, hollow fiber, isotactic polypropylene, membrane, morphology

摘要： Isotactic polypropylene (iPP) hollow fiber microporous membranes were prepared using thermally induced phase separation (TIPS) method. Di-n-butyl phthalate (DBP), dioctyl phthalate (DOP), and the mixed solvent were used as diluents. The effect of α (DOP mass fraction in diluent) on the morphology and performance of the hollow fiber was investigated. With increasing α, the morphology of the resulting hollow fiber changes from typical cellular structure to mixed structure, and then to typical particulate structure. As a result, the permeability of the hollow fiber increases sharply, and the mechanical properties of the hollow fiber decrease obviously. It is suggested that the morphology and performances of iPP hollow fiber microporous membrane can be controlled via adjusting the compatibility between iPP and diluent.

关键词: thermally induced phase separation;hollow fiber;isotactic polypropylene;membrane;morphology

YANGZhensheng,LIPingli, CHANGHeying, WANGShichang. Effect of Diluent on the Morphology and Performance of IPP Hollow Fiber Microporous Membrane via Thermally Induced Phase
Separation
[J]. .

杨振生,李凭力, 常贺英, 王世昌. 热致相分离法iPP中空纤维微空膜结构与性能——稀释剂的作用[J]. CIESC Journal.

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