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Synthesis and characterization of κ‐carrageenan/poly( N,N ‐diethylacrylamide) semi‐interpenetrating polymer network hydrogels with rapid response to temperature
Author(s) -
Chen Jun,
Liu Mingzhu,
Jin Shuping,
Liu Hongliang
Publication year - 2008
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1184
Subject(s) - self healing hydrogels , materials science , fourier transform infrared spectroscopy , swelling , interpenetrating polymer network , lower critical solution temperature , chemical engineering , polymer , polymer chemistry , polymerization , radical polymerization , scanning electron microscope , composite material , copolymer , engineering
In this study, a novel classical thermo‐ and salt‐sensitive semi‐interpenetrating polymer network (semi‐IPN) hydrogel composed of poly( N,N ‐diethylacrylamide) (PDEAm) and κ‐carrageenan (KC) was synthesized by free radical polymerization. The structure of the hydrogels was studied by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). FTIR and SEM revealed that the semi‐IPN hydrogels possessed the structure of H‐bonds and larger number of pores in the network. Compared to the PDEAm hydrogel, the prepared semi‐IPN hydrogels exhibited a much faster response rate to temperature changes and had larger equilibrium swelling ratios at temperatures below the lower critical solution temperature (LCST). The salt‐sensitive behavior of the semi‐IPN hydrogels was dependent on the content of KC. In addition, during the reswelling process, semi‐IPN hydrogels showed a non‐sigmoidal swelling pattern. Copyright © 2008 John Wiley & Sons, Ltd.