The purpose of this work was to improve the properties of the starch/poly(vinyl alcohol) (PVA) films with nano silicon dioxide (nano SiO2). Starch/PVA/nano‐SiO2 biodegradable blend films were prepared by a solution casting method. The characteristics of the films were assessed by Fourier Transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X‐ray photoelectron spectroscopy (XPS). The results obtained in this study indicated that the nano‐SiO2 particles were dispersed evenly within the starch/PVA coating and an intermolecular hydrogen bond and a strong chemical bond COSi were formed in the nano‐SiO2 and starch/PVA. That the blending of starch, PVA and nano‐SiO2 particles led to uniform starch/PVA/nano‐SiO2 blend films with better mechanical properties. In addition, the nano‐SiO2 particles can improve the water resistance and light transmission of the blend films.
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Tang et al. (2009) studied this question.