Premium
Selective permeability of PVA membranes. II. Heat‐treated membranes
Author(s) -
Katz Moshe G.,
Wydeven Theodore
Publication year - 1982
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.1982.070270109
Subject(s) - membrane , vinyl alcohol , permeability (electromagnetism) , salt (chemistry) , materials science , chemical engineering , chemistry , polymer chemistry , composite material , organic chemistry , polymer , biochemistry , engineering
The water and salt transport properties of untreated and heat‐treated poly(vinyl alcohol) (PVA) membranes were investigated. Water and salt permeabilities decreased abruptly as a result of heat treatment. The effect of heat treatment on the water and salt transport in PVA is expressed mainly by changes in the activation energies of the corresponding permeability coefficients. Due to the fact that the decrease in the salt permeability with heat treatment was considerably greater than the decrease in the water permeability, a pronounced improvement in the salt rejection of PVA membranes was found as a result of heat treatment.