Premium
Temperature effect on the permeation through poly(2‐hydroxyethyl methacrylate) membrane
Author(s) -
Yoon Sung Chul,
Jhon Mu Shik
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.1982.070271213
Subject(s) - permeation , membrane , distilled water , methacrylate , aqueous solution , urea , polymer chemistry , reverse osmosis , dilution , chemical engineering , methyl methacrylate , chemistry , permeability (electromagnetism) , materials science , chromatography , organic chemistry , polymer , copolymer , thermodynamics , biochemistry , physics , engineering
The temperature dependence of permeability through highly syndiotactic poly(2‐hydroxyethyl methacrylate) [P(HEMA)] membrane is reported for highly polar organic solutes such as ureas, methyl substituted ureas and amides, and for NaCl and Na 2 SO 4 . The membranes used were equilibrated in distilled water at each temperature before measurements. From the linear correlationship between the excess heat capacities, ϕ C p o (excess) in aqueous solution at infinite dilution and the permeability parameter PM 1/3 , it is found that the water structure perturbing capability of the polar organic solutes is a controlling factor in the permeation mechanism at relatively low temperature, where P(HEMA) membrane has higher water content and more structured water. In addition, it is found that the poor separation for urea of cellulose acetate membrane in the reverse osmosis practice is due to the higher water structure‐breaking capability of urea.