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Studies on polyurea‐amide membranes
Author(s) -
Joshi S. V.,
Rao A. V.
Publication year - 1991
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.1991.070420634
Subject(s) - polyurea , membrane , interfacial polymerization , casting , polymer chemistry , chemical engineering , materials science , polymer , amide , sulfuric acid , polyamide , diamine , salt (chemistry) , chemistry , permeability (electromagnetism) , chloride , organic chemistry , polyurethane , composite material , monomer , biochemistry , engineering
Different polyurea‐amides were synthesized by interfacial polymerization of acid chloride, diamine, and diisocyanate. The polymers and the membranes were characterized for their RO/UF applications. Highly porous membranes could be prepared from the sulfuric acid‐based casting formulation and the membrane casting conditions were established. The resulting membranes are not asymmetric as they give high permeability to water and salt solutions. They are found to be resistant to many organic solvents, thus making them useful in concentration/separation applications. Whole milk, egg albumin and Na‐alginate were found to be rejected 100% by these membranes, while solutes of about 20,000 M w are found to be rejected to the extent of 70‐80%.