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Hyperfiltration membranes prepared by radiochemical grafting of styrene onto poly(tetrafluoroethylene). Influence of the size and shape of emulsion particles used to obtain the PTFE film

✍ Scribed by S. Munari; F. Vigo; M. Nicchia; P. Canepa


Publisher
John Wiley and Sons
Year
1976
Tongue
English
Weight
443 KB
Volume
20
Category
Article
ISSN
0021-8995

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✦ Synopsis


Abstract

The hyperfiltration performances of membranes obtained from PTFE films sintered with different granulometric distribution emulsions were studied. It has been possible to show that: (1) large spherical particles lead to high flux, poor rejection membranes, and vice versa for small spherical particles; (2) the particle shape affects the membrane properties. “Stick” shaped particles lead to better rejection properties than the spherical and “fibrillar” ones. An attempt was also made to utilize a PTFE/PMMA porous support to make asymmetric membranes.


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