Abstract
AbstractTo 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.
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