Preparation and Properties of PTFE/PAN Blend Hollow Fiber Membrane
LI Liang1,2, XIAO Chang-fa1,2, HUANG Qing-lin1,2, HU Xiao-yu1,2
1. School of Materials Science and Engineering,Tianjin Polytechnic University, Tianjin 300387,China;
2. State Key Laboratory of Hollow Fiber Membrane Materials and Processes,Tianjin Polytechnic University,Tianjin 300387,China
Abstract：Poly(tetrafluoroethylene)(PTFE)/poly(acrylonitrile)(PAN) blend hollow fiber membranes were prepared from the blends of PTFE emulsion and PAN through dry-wet spinning method. The chemical constitutions of hollow fiber membranes before and after sintering were investigated with FT-IR. Meanwhile, TGA was utilized to analyse the thermal stability of hollow fiber membranes. The structure and morphology of hollow fiber membranes at different sintering temperatures were characterized by field emission scanning electronic microscopy (FESEM).Results show that cyclization reaction occurs during the pre-oxidation and sintering process in PAN. Moreover, the trapezoidal structure improves the thermal resistance of hollow fiber membranes; the size of node-fibril structure increases obviously as the raising of sintering temperature, which leads to the enhancement of membrane mechanical strength.
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