In this study, hybrid nanocomposite films were prepared by a sol-gel method. Al₂O₃ particles of 100 nm diameter were mixed with small SiO₂ nanoparticles of 10 nm in a coating solution. After coating onto a plastic sheet, the water vapor transmittance rate (WVTR) was reduced from 12.2 to 0.15 g m⁻² day⁻¹. However, due to the particle aggregation in the Al₂O₃/SiO₂ system, pore size of the barrier coating remained constant despite the Al₂O₃/SiO₂ ratio. To avoid particle aggregation and to reduce the WVTR, vanadium oxide was added in the coating solution to suppress the aggregation of nanofillers via dehydroxylation. From BET analysis, the addition of vanadium oxide resulted in a smaller pore size to further inhibit water vapor penetration. The WVTR was lowered to 0.095 g m⁻² day⁻¹ at a relative humidity of 100%, corresponding to an improvement of 99.2% compared to that of the pristine PET.

在这项研究中，杂化纳米复合膜是通过溶胶-凝胶法制备的。将直径为100 nm的Al ₂ O ₃颗粒与10 nm的小的SiO ₂纳米颗粒在涂料溶液中混合。在涂覆到塑料片上之后，水蒸气透过率（WVTR）从12.2降低至0.15gm ^-2天^-1。然而，由于在Al ₂ O ₃ / SiO ₂系统中的颗粒聚集，所以尽管Al ₂ O ₃ / SiO ₂，阻挡涂层的孔径仍保持恒定。比率。为了避免颗粒聚集并降低WVTR，在涂层溶液中添加了氧化钒以抑制纳米填料通过脱羟基的聚集。根据BET分析，钒氧化物的加入导致较小的孔径，从而进一步抑制了水蒸气的渗透。在100％的相对湿度下，WVTR降至0.095 gm ^-2 day ^-1，与原始PET相比，提高了99.2％。