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题名: Sintering process investigation during polytetrafluoroethylene hollow fibre membrane fabrication by extrusion method
作者: Jia, Jingxuan1, 2;  Kang, Guodong1;  Zou, Tong1, 2;  Li, Meng1;  Zhou, Meiqing1;  Cao, Yiming1
关键词: PTFE ;  extrusion fabrication ;  hollow fibre membrane ;  sintering ;  membrane properties
刊名: HIGH PERFORMANCE POLYMERS
发表日期: 2017-11-01
DOI: 10.1177/0954008316669409
卷: 29, 期:9, 页:1069-1082
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Polymer Science
研究领域[WOS]: Polymer Science
英文摘要: In this study, the effect of sintering conditions including manner, temperature and duration on properties of polytetrafluoroethylene (PTFE) hollow fibre membrane fabricated by extrusion method was intensively investigated. Different from un-sintered and relaxed sintered, the fixed sintered PTFE hollow fibre membrane was observed to generate a uniform fibril-node' porous structure and a main crystal transformation to folded chain crystal with smaller size. Consequently, it was found that for fixed setting sintering, both temperature increase from 340 degrees C to 400 degrees C and duration prolongation obviously improved pore size, ethanol permeation performance and mechanical strength. Additionally, the test results revealed that the membrane sintered below virgin melting point (350 degrees C) had a noticeable higher porosity but poorer ethanol permeation performance that could be primarily attributed to increased ratio of closed pore. The sintering condition exhibited evident influence on PTFE hollow fibre membrane thermal stability, though it showed no alteration to the thermal decomposition of PTFE. The obtained PTFE hollow fibre membrane was tested to evaluate their vacuum membrane distillation (VMD) performances. It was found that PTFE membrane from lower sintering temperature delivered a better salt rejection; on the other hand, the permeate flux was improved by increased vacuum pressure during VMD operation.
关键词[WOS]: PTFE POROUS MEMBRANE ;  MOLECULAR-WEIGHT ;  CRYSTALLINE-STRUCTURE ;  POLY(TETRAFLUOROETHYLENE) ;  MELT ;  POWDER ;  PASTE ;  DISTILLATION ;  TEMPERATURE ;  MECHANISM
语种: 英语
WOS记录号: WOS:000414466300008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/149754
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China

Recommended Citation:
Jia, Jingxuan,Kang, Guodong,Zou, Tong,et al. Sintering process investigation during polytetrafluoroethylene hollow fibre membrane fabrication by extrusion method[J]. HIGH PERFORMANCE POLYMERS,2017,29(9):1069-1082.
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