Abstract This study explores the preparation of corn starch (CS) films incorporated with glycerol, thymol, and combination of glycerol and thymol via solution casting technique. The resulting films were characterized in terms of structural changes, physical, optical, mechanical, and thermal properties. Results show that the presence of both glycerol and thymol in CS film increased the film thickness while reduced the moisture content, solubility, and transparency of the film. Fourier transform infrared spectroscopy revealed that intermolecular hydrogen bonding existed between CS, glycerol, and thymol. The presence of glycerol had more remarkable impact on tensile strength of CS films than that of thymol alone, while the combination of thymol and glycerol led to synergistic effects. Thermal degradation profiles of the films revealed the maximum degradation temperature of CS film with glycerol and thymol shifted to a higher temperature compared to other films indicating better thermal stability. In conclusion, the inclusion of glycerol and thymol led to improvement in overall performance of corn starch films.

中文翻译：

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甘油和百里酚对玉米淀粉薄膜物理、机械和热性能的影响

摘要 本研究探索了通过溶液浇铸技术制备掺有甘油、百里酚以及甘油和百里酚组合的玉米淀粉 (CS) 薄膜。所得薄膜的特征在于结构变化、物理、光学、机械和热性能。结果表明，CS薄膜中甘油和百里酚的存在增加了薄膜厚度，同时降低了薄膜的水分含量、溶解度和透明度。傅里叶变换红外光谱表明，CS、甘油和百里酚之间存在分子间氢键。与单独使用百里酚相比，甘油的存在对 CS 薄膜拉伸强度的影响更显着，而百里酚和甘油的组合产生协同效应。薄膜的热降解曲线表明，与其他薄膜相比，具有甘油和百里酚的 CS 薄膜的最大降解温度转移到更高的温度，表明具有更好的热稳定性。总之，包含甘油和百里酚导致玉米淀粉薄膜的整体性能的改善。