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Preparation and characterization of pH‐sensitive hydrogel fibers based on hydrolyzed‐polyacrylonitrile/soy protein
Author(s) -
Yu Liwei,
Yan Dongyan,
Sun Gang,
Gu Lixia
Publication year - 2008
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.27689
Subject(s) - polyacrylonitrile , elongation , soy protein , hydrolysis , materials science , chemical engineering , polymer chemistry , morphology (biology) , polymer , composite material , chemistry , ultimate tensile strength , organic chemistry , biochemistry , genetics , biology , engineering
Novel smart hydrogel fibers were prepared from a blend of hydrolyzed‐polyacrylonitrile (H‐PAN) and soy protein (SP). The dynamic and static elongation/contraction behaviors were studied. It was discovered that H‐PAN/SP hydrogel fibers consisted of a multiporous structure. With an increase in the content of SP, the hydrogel fibers exhibited excellent reversible pH‐sensitive behavior. When the weight ratio of H‐PAN to SP was 4 : 6, the hydrogel fibers showed the best response times at 1.35 s (elongation) and 0.63 s (contraction). Discontinuous volume phase transitions and hysteresis loops of the hydrogel fibers induced by changes in pH value were found. These results were found to be explicable in terms of the surface morphology and polyampholytic properties of H‐PAN/SP hydrogel fibers. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008