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
• DOI: 10.1002/app.1976.070200120

✦ 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.