低温等离子体改性玉米醇溶蛋白基膜表面亲水性的研究

Effect of Cold Plasma on the Structure and Surface Hydrophilicity of Zein-Based Films

采用低温等离子体技术对蛋白基膜表面进行改性处理,研究低温等离子体处理对蛋白膜表面亲水性,表面形貌,化学成分和热稳定性影响。结果表明等离子体处理能够显著提高蛋白基膜表面亲水性,处理时间60 s,处理功率110 W,基板间距4.3 mm,蛋白基膜的表面接触角最小,为30.32°。由于等离子体的刻蚀作用,处理后的蛋白基膜表面形成粗糙,不规则点状结构。红外结果表明,等离子体处理可以提高蛋白膜表面含氧基团含量。总之,经过等离子体处理的玉米醇溶蛋白基膜具有更好的亲水性,为在食品包装领域的进一步应用奠定基础。

The surface of the zein-based film was modified by cold plasma technology.The effect of cold plasma on surface hydrophilicity,morphology,chemical composition and thermal stability of zein-based films was investigate.The results showed that cold plasma treatment significantly improved the surface hydrophilicity of the zein-based films,the treatment time of 60 s,the treatment power of 110 W and the substrate spacing of 4.3 mm was optimum condition for decreasing water contact angle with minimum value of 30.32°.The surface morphology of the plasma treated film became rough and irregular due to the plasma etching.The Fourier transform infrared spectroscopy result showed that cold plasma treatment increased the content of oxygen groups on the surface of zein-based films.In conclusion,the treated zein-based film with an increasing hydrophilic might be better utilized in food packaging field.