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Preparation and characterization of pH-sensitive hydrogel fibers based on hydrolyzed-polyacrylonitrile/soy protein

✍ Scribed by Liwei Yu; Dongyan Yan; Gang Sun; Lixia Gu

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
357 KB
Volume
108
Category
Article
ISSN
0021-8995

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✦ Synopsis

Abstract

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

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