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.
[1] TAKASHI KUROSE,TATSUHIRO TAKAHASHI,KIYOHITO KOYAMA.A new process to make a porous PTFE structure from aqueous PTFE dispersion with the help of hydrogel [J].J Porous Mater,2004, 11(3):173-181.[2] 姚文清,朱永法,曹立礼,等.聚四氟乙烯薄膜等离子体表面改性的研究[J].材料工程,1997,(12):26-32.[3] 罗衍慧,邓新华,孙元,等.功能化聚四氟乙烯微孔膜研究进展[J].中国塑料,2009,23(5):20-23.[4] BOSSE C F, KOWLIGI R R. Uniformly expanded PTFE film . US Patent: 5321109,1994-07-14.[5] HUANG Q L, XIAO C F, HU X Y, et al.A novel method to prepare hydrophobic poly(tetrafluoroethylene) membrane and its properties [J].J Mater Sci,2010,45(24): 6569-6573.[6] 宋明斌,张立祥,黄文浩,等.聚丙烯腈填充聚四氟乙烯复合材料的结构表征及性能[J].高分子材料科学与工程,2007,23(1):92-98.[7] 贺福.碳纤维及其应用技术[M].北京:化学工业出版社,2004. 65-76.[8] CHEN Y C, TSAI C C, LEE Y D. Preparation and properties of silyated PTFE/SiO2 organic-inorganic hybrids via sol gel process [J].J Polym Sci, 2004, 42(7):1789-1807.[9] BROWN E N, DATTELBAUM D M. The role of crystalline phase on fracture and microstructure evolution of polytetrafluoroethylene(PTFE) [J]. Polymer,2005, 46:3056-3068.[10] WEGENER M, WIRGES W,TIERSCH B. Porous polytetrafluoroethylene (PTFE) electret films: porosity and time dependent charging behavior of the free surface [J].J Porous Mater,2007,14(1):111-118.
2013, Vol. 0 
