Anchote (Coccinia abyssinica) starch films were prepared by a solution casting method with glycerol, 1-ethyl-3-methylimidazolium acetate, sorbitol or triethylene glycol as plasticizers. The effect of these plasticizers and their concentration on film microstructure, thermal, and mechanical properties was investigated. Scanning electron microscopy revealed that regardless of plasticizer type, films possessing higher plasticizer content had more homogeneous morphologies than those with lower plasticizer content. The FTIR spectra of films plasticized with 1-ethyl-3-methylimidazolium acetate had higher intensity peaks at 3150, 1400 and 1000 cm-1 when compared to other film peaks. These data show that 1-ethyl-3-methylimidazolium acetate plasticized films have decreased molecular order which results in less hydrogen bonding. For this reason, films developed from 1-ethyl-3-methylimidazolium acetate were more flexible than the others. The effect of plasticizers on the thermal properties of the anchote starch films was investigated using thermogravimetric analysis (TGA). Films made from 30% (w/w) plasticizer concentration exhibited higher thermal stability for all types of plasticizer. Mechanical testing showed that sorbitol films had the highest tensile strength, approximately 2 times that of the triethylene glycol plasticized film and 3 times that of the film made from 1-ethyl-3-methylimidazolium acetate.

中文翻译：

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增塑剂对由埃塞俄比亚本土块茎作物 Anchote（Coccinia abyssinica）淀粉开发的热塑性淀粉薄膜的影响。

以甘油、乙酸1-乙基-3-甲基咪唑鎓、山梨醇或三甘醇为增塑剂，采用溶液流延法制备Anchote（Coccinia abyssinica）淀粉膜。研究了这些增塑剂及其浓度对薄膜微观结构、热性能和机械性能的影响。扫描电子显微镜显示，无论增塑剂类型如何，具有较高增塑剂含量的薄膜比具有较低增塑剂含量的薄膜具有更均匀的形态。与其他薄膜峰相比，用 1-乙基-3-甲基咪唑乙酸盐增塑的薄膜的 FTIR 光谱在 3150、1400 和 1000 cm-1 处具有更高强度的峰。这些数据表明，1-乙基-3-甲基咪唑鎓醋酸盐增塑薄膜的分子有序度降低，从而导致氢键减少。因此，由 1-乙基-3-甲基咪唑乙酸盐开发的薄膜比其他薄膜更柔韧。使用热重分析（TGA）研究增塑剂对锚定淀粉膜热性能的影响。由 30% (w/w) 增塑剂浓度制成的薄膜对所有类型的增塑剂均表现出较高的热稳定性。力学测试表明，山梨醇薄膜具有最高的拉伸强度，大约是三乙二醇增塑薄膜的2倍，是由1-乙基-3-甲基咪唑乙酸酯制成的薄膜的3倍。