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- W2000864034 abstract "Physically crosslinked chitosan hydrogels were synthesized by grafting d,l-lactic acid (LA) and/or glycolic acid (GA) with different feed ratios. The physical crosslinking was formed due to the hydrophobic side chains aggregation and intermolecular interactions through hydrogen bonds between side and main chains. The crystallinity of original chitosan decreased by grafting LA and GA. The structural change of the hydrogels in different pH buffers was characterized by FT-IR method and the results were interpreted. Differential scanning calorimetry (DSC) was used to probe the states of water in the chitosan hydrogels. Three types of water were found in the samples, i.e. freezing water (namely free water), non-freezing water (namely bound water), and freezing bound water, while there are variations in the amount of bound water for different hydrogels. The effect of hydrophobic side chains on water state and swelling behavior were discussed." @default.
- W2000864034 created "2016-06-24" @default.
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- W2000864034 date "2000-06-01" @default.
- W2000864034 modified "2023-10-14" @default.
- W2000864034 title "Novel pH-sensitive chitosan hydrogels: swelling behavior and states of water" @default.
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- W2000864034 doi "https://doi.org/10.1016/s0032-3861(99)00685-0" @default.
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