The aim of this investigation was to determine the role of negative direct current and alternating current (plasma) corona treatments in modification of bio-based dispersion barrier coatings and the response of replacing fossil-based binder with a thermoplastic bio-based binder (starch). The study emphasizes the importance of understanding and optimizing electric corona discharge in order to obtain high oxidation level without harming the substrate and causing unintentional treatment of the reverse side. The coatings were exposed to different corona treatment conditions using a novel developed sheet-fed laboratory-scale device. Corona-induced topographical, mechanical and surface chemical changes were observed from atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and contact angle and surface energy measurements. XPS results indicated further that partial starch decomposition occurred after plasma treatment. Coated surfaces became substantially smoother after both treatments suggesting that nanoparticle migration and re-orientation effects occurred. Additionally, reverse side effects and strike through were also discussed.

这项研究的目的是确定负直流电和交流电（等离子）电晕处理在改性生物基分散屏障涂料中的作用以及用热塑性生物基粘结剂（淀粉）替代化石基粘结剂的响应。该研究强调了解和优化电晕放电的重要性，以便获得高氧化水平而又不损害基材并造成意外的反面处理。使用新型开发的单张纸实验室规模的设备将涂层暴露在不同的电晕处理条件下。通过原子力显微镜（AFM），X射线光电子能谱（XPS）以及接触角和表面能测量，可以观察到电晕引起的形貌，机械和表面化学变化。XPS结果进一步表明，血浆处理后发生了部分淀粉分解。两种处理后，涂层表面均变得基本光滑，这表明发生了纳米粒子迁移和重新取向效应。此外，还讨论了副作用和透湿性。