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pH sensitivity and ion sensitivity of hydrogels based on complex‐forming chitosan/silk fibroin interpenetrating polymer network
Author(s) -
Chen Xin,
Li Wenjun,
Zhong Wei,
Lu Yuhua,
Yu Tongyin
Publication year - 1997
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/(sici)1097-4628(19970912)65:11<2257::aid-app23>3.0.co;2-z
Subject(s) - fibroin , glutaraldehyde , swelling , aqueous solution , chitosan , interpenetrating polymer network , silk , self healing hydrogels , polymer chemistry , polymer , materials science , chemical engineering , fourier transform infrared spectroscopy , chemistry , composite material , chromatography , organic chemistry , engineering
A novel natural polymer blend, namely, a semi‐interpenetrating polymer network (semi‐IPN) composed of crosslinked chitosan with glutaraldehyde and silk fibroin was prepared. The FTIR spectra of the semi‐IPN manifested that the chitosan and silk fibroin had a strong hydrogen‐bond interaction and formed an interpolymer complex. The semi‐IPN showed good pH sensitivity and ion sensitivity. According to the different swelling ratios of the semi‐IPN in the buffer solution with different pH values or the AlCl 3 aqueous solution with different concentrations, the semi‐IPN could swell and shrink while being put alternately into different pH buffer solutions or AlCl 3 aqueous with different concentrations. The semi‐IPN could also act as an “artificial muscle” because its swelling‐shrinking behavior exhibited a fine reversibility. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65: 2257–2262, 1997