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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
Author(s) -
Munari S.,
Vigo F.,
Nicchia M.,
Canepa P.
Publication year - 1976
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.1976.070200120
Subject(s) - tetrafluoroethylene , membrane , materials science , styrene , chemical engineering , grafting , emulsion , particle (ecology) , polymer chemistry , composite material , porosity , particle size , copolymer , polymer , chemistry , biochemistry , oceanography , engineering , geology
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.