National Engineering Laboratory of Intelligent Food Technology and Equipment, Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Key Laboratory for Agro-Products Nutritional Evaluation of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing, Fuli Institute of Food Science, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
Int J Biol Macromol. 2019 Oct 1;138:340-348. doi: 10.1016/j.ijbiomac.2019.07.039. Epub 2019 Jul 8.
Glow discharge plasma (GDP) was used to modify chitosan films to obtain desirable properties. The chitosan films were treated with GDP of 0-800 W for 1 min, respectively. The molecular structure of chitosan films changed under GDP treatment. Chitosan films showed an enhancement of crystallinity with the increasing power of GDP, and the GDP treatment provided them with higher thermal stability, manifested as the exothermic peaks shifted from 291.5 °C (0 W) to 294.1 °C (800 W). Scanning electron microscope (SEM) indicated that the surface of chitosan films got rougher with 0-600 W GDP treatment, accompanied by the increase of tensile strength (TS), and the TS did not increase with the 800 W GDP treatment. However, the water vapor permanent (WVP) became higher with GDP treatment. GDP treatment also exhibited influence on chromatic aberration of chitosan films. GDP is proved to be a promising green, pollution-free, rapid technology to modify chitosan films.
辉光放电等离子体（GDP）被用于修饰壳聚糖薄膜以获得理想的性能。壳聚糖薄膜分别用 0-800 W 的 GDP 处理 1 分钟。壳聚糖薄膜的分子结构在 GDP 处理下发生了变化。壳聚糖薄膜的结晶度随着 GDP 功率的增加而提高，GDP 处理为其提供了更高的热稳定性，表现为放热峰从 291.5°C（0 W）移至 294.1°C（800 W）。扫描电子显微镜（SEM）表明，壳聚糖薄膜的表面在 0-600 W GDP 处理下变得更粗糙，同时拉伸强度（TS）增加，而 800 W GDP 处理后 TS 没有增加。然而，水蒸气渗透率（WVP）随着 GDP 处理而升高。GDP 处理也对壳聚糖薄膜的色差有影响。GDP 被证明是一种有前途的绿色、无污染、快速的壳聚糖薄膜改性技术。
