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Preparation and properties of polytetrafluoroethylene/CaCO 3 hybrid hollow fiber membranes
Author(s) -
Huang Qinglin,
Xiao Changfa,
Hu Xiaoyu
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.33986
Subject(s) - polytetrafluoroethylene , materials science , membrane , fiber , vinyl alcohol , composite material , sintering , hollow fiber membrane , chemical engineering , boric acid , scanning electron microscope , polymer chemistry , polymer , chemistry , organic chemistry , engineering , biochemistry
A novel method of preparing polytetrafluoroethylene (PTFE) hollow fiber membrane was presented by utilizing poly (vinyl alcohol) (PVA) can form a gel of two dimensional complex compounds with Boric acid (H 3 BO 3 ). Effects of H 3 BO 3 on PTFE nascent hollow fiber were investigated, and the results showed that the introduction of H 3 BO 3 effectively reduced the addition of PVA. The configuration named “fibril” formed between PVA and H 3 BO 3 could be observed in nascent hollow fiber by SEM (Scanning electronic microscopy). Furthermore, Calcium carbonate (CaCO 3 ) particles (60 nm∼ 90 nm) were introduced into PTFE matrix. The interfacial microvoids (IFMs) which were different from the PTFE sintering or node‐fibril network structure were obtained. The assumption of the IFMs formation was proposed in this study. Effects of CaCO 3 amount and draw ratios on structure and properties of hybrid hollow fiber membranes were analyzed, and the SEM results showed that the IFMs quantity and diameter improved with draw ratio increasing. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011