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Hydrogels consisting of sodium alginate and N ‐isopropylacrylamide covalently crosslinked with N , N ′‐methylenebisacrylamide were prepared. The mixed‐interpenetrated networks obtained were characterized using elemental analysis, Fourier transform infrared and Raman spectroscopy, swelling measurements and environmental scanning electron microscopy. The thermo‐ and pH‐responsive properties of these hydrogels were evidenced by their swelling behaviour, which depended also on the amount of crosslinking agent and hydrogel composition.
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Dumitriu et al. (2010) studied this question.
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