To improve the water resistance property of zein film, polycaprolactone (PCL) was grafted on the zein film after atmospheric‐pressure cold plasma (ACP) pretreatment. The grafting yields of PCL ranging from 15.91% ± 0.67% to 28.95% ± 0.79% were remarkably enhanced than the untreated one (12.15% ± 0.57%; p < . 05), which indicated that ACP modification could effectively improve the grafting ability of the zein film. Fourier‐transform infrared spectrum and X‐ray diffraction patterns revealed that PCL layer had been successfully grafted and the lateral α‐helix packing was susceptible to plasma treatment. Findings from this study indicated that ACP pretreatment was an effective modification approach in zein‐based polymers for packaging application.

中文翻译：

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大气压冷等离子体预处理制备PCL接枝玉米醇溶蛋白膜及其表征

为了改善玉米蛋白膜的耐水性，在常压冷等离子体（ACP）预处理后将聚己内酯（PCL）接枝到玉米蛋白膜上。PCL的接枝率在15.91％±0.67％至28.95％±0.79％的范围内比未经处理的PCL显着提高（12.15％±0.57％; p  <.05），这表明ACP修饰可以有效地提高PCL的接枝能力。玉米蛋白膜。傅立叶变换的红外光谱和X射线衍射图表明PCL层已成功接枝，且侧面α螺旋堆积易于进行等离子体处理。这项研究的结果表明，ACP预处理是玉米醇溶蛋白基聚合物在包装应用中的有效改性方法。