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Preparation and properties of starch-based film using N-(1-hydroxy-2-methylpropan-2-yl)formamide as a new plasticizer

Jianmei Chen, Hongguang Dai, Xianliang Sheng, Naren Liu, Lirong Wang, Jiayu Zhang

N-(1-hydroxy-2-methylpropan-2-yl)formamide (HMF) was used as a new plasticizer for corn starch to prepare starch-based film (SF). By scanning electronmicroscopy (SEM), starch granules were completely disrupted and proved to transfer to homogeneousmaterial. The crystallinity of corn starch and HMF-plasticized starch-based film (HSF) was characterized by X-ray diffraction (XRD). The glass transition temperatures (Tg) of glycerolplasticized starch-based film(GSF) andHSFwere investigated by differential scanning calorimetry (DSC). At relative humidity (RH) 75%, the water resistance of HSF was superior to that of GSF, under the same conditions, water vapor absorption of glycerol was higher than that of HMF. The water vapor permeability of HSF was lower than that of GSF, i.e. the water vapor barrier property ofHSF was better than that of GSF. The elongation at break of HSF was higher than that of GSF, but the tensile strength of HSF was inferior toGSF at 75%RH.