Figure 2.
NMR spectra of (A) CMC (1H NMR), (B) CHI (1H NMR), and (C) PVA ((a) 1H NMR and (b) 13C NMR). (D) FTIR spectra of the three polymer components of hydrogels (a) CMC, (b) CHI, and (c) PVA.
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