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FTIR spectra (a) of chitosan film (Q), corn starch film (M), corn starch–chitosan blended film (MQ) and corn starch film coated with chitosan (EM) and crosslinked chitosan (ERM); b cassava starch film (C) and cassava starch–chitosan blended film (CQ) and cassava starch film coated with chitosan (EC) and crosslinked chitosan (ERC)
