Department of Food Science and Engineering, Faculty of Agriculture, University of Zanjan, 45371-38791 Zanjan, Iran.
Department of Food Science and Engineering, Faculty of Agriculture, University of Zanjan, 45371-38791 Zanjan, Iran.
Int J Biol Macromol. 2018 Sep;116:1082-1088. doi: 10.1016/j.ijbiomac.2018.05.138. Epub 2018 May 21.
This paper reports on an experiment in which starch/kefiran/TiO (SKT)-based bio-nanocomposite films were developed and modified by photo-chemical reaction. In so doing, film-forming solutions were exposed to ultraviolet A (UV-A) for different times (1, 6, and 12 h). The obtained results indicated that increasing UV-A exposure time brought about an increase (≈14.9%) in the tensile strength of bio-nanocomposites. However, elongation at break and Young's modulus of irradiated film specimen decreased (≈32%, ≈12%, respectively) by increasing UV-A exposure time, and the moisture-sensitive parameters of specimen decreased using UV-A irradiation. According to the results, the functional properties of irradiated bio-nanocomposite are depended on the ratio of cross-linkages between polymer chains and the potentially produced mono and disaccharide by UV-A.
本文报道了一种通过光化学反应对以淀粉/结冷胶/二氧化钛（SKT）为基础的生物纳米复合材料进行开发和改性的实验。为此，将成膜溶液暴露于紫外 A（UV-A）下不同时间（1、6 和 12 小时）。所得结果表明，增加 UV-A 暴露时间会使生物纳米复合材料的拉伸强度增加（≈14.9%）。然而，通过增加 UV-A 暴露时间，断裂伸长率和杨氏模量的辐照膜试样分别降低（≈32%，≈12%），并且使用 UV-A 照射降低了试样的吸湿敏感参数。根据结果，辐照生物纳米复合材料的功能特性取决于聚合物链之间的交联比以及 UV-A 潜在产生的单糖和二糖。
