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Water sorption, membrane potentials, and ion permeability of styrene‐grafted Bombyx mori silk fibroin membrane
Author(s) -
Demura Makoto,
Kitamura Aio,
Shibamoto Akio,
Asakura Tetsuo
Publication year - 1988
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.1988.070360307
Subject(s) - fibroin , membrane , styrene , bombyx mori , grafting , polymer chemistry , adsorption , sorption , silk , chemical engineering , materials science , bombycidae , permeation , chemistry , copolymer , organic chemistry , composite material , polymer , biochemistry , gene , engineering
Characterization of styrene‐grafted Bombyx mori silk fibroin membrance was investigated. It was revealed from the water sorption and 1 H nuclear magnetic resonance (NMR) measurements that the amounts of water adsorbed on the silk fibroin membranes decreased by the styrene grafting and the states of water adsorbed on the styrene‐grafted silk fibroin membranes were not homogeneous; the presence of two components of water adsorbed on the membranes at 60% relative humidity was observed. In addition, the fraction of the fast component decreased with increasing styrene grafting. The membrane potentials increased with increasing of the grafting. The KCl permeability of the membrane strongly depends on the degree of styrene grafting.