Biocomposites of poly(vinyl alcohol) (PVA) incorporated with eggshell powder (ESP) were prepared by solution blending and casting into films. The effects of ESP content (0–50 wt% of dry PVA basis) on structure and properties of the resultant PVA/ESP composite films were systematically evaluated. Fourier transform infrared spectroscopy and scanning electron microscopy suggested a strong adhesion and the well-dispersion of ESP particles in the PVA matrix due to the hydrogen-bonding interactions. The incorporation of opaque, hydrophobic and stable ESP in the composite films could consequently decreased their transparency and hydrophilicity while improving their thermal stability. Optimal ESP content in the composite films was found to be 30 wt% in terms of their mechanical and water vapor barrier properties, showing a tensile strength of 38.78 MPa, elongation at break of 165.9%, and water vapor permeability of 1.229 × 10^–12 g cm/cm² s Pa, respectively. However, overloading of ESP in the composite films might produce some aggregations and thus have negative effects on their performance. These results indicated that ESP was an excellent biological filler for PVA to prepare composite films with improved properties, which might hold the potential as biodegradable materials for packaging applications.

通过溶液共混并流延成膜来制备掺有蛋壳粉（ESP）的聚乙烯醇（PVA）生物复合材料。系统评价了ESP含量（干PVA的0-50 wt％）对所得PVA / ESP复合膜结构和性能的影响。傅立叶变换红外光谱和扫描电子显微镜表明，由于氢键相互作用，ESP颗粒在PVA基质中具有很强的附着力和良好的分散性。复合膜中不透明，疏水和稳定的ESP的结合可能会降低其透明度和亲水性，同时提高其热稳定性。根据机械和水蒸气阻隔性能，复合膜中的最佳ESP含量为30 wt％，抗张强度为38.78 MPa，^{分别为–12}  g cm / cm ²  s Pa。但是，复合膜中ESP的过载可能会产生一些聚集，从而对其性能产生负面影响。这些结果表明，ESP是PVA制备具有改善性能的复合膜的极佳生物填充剂，可能具有用作包装应用的可生物降解材料的潜力。