Thermoforming studies of corn starch-derived biopolymer film filled with nanoclays
Thermoforming studies of corn starch-derived biopolymer film filled with nanoclays
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DOI：
10.1177/8756087915590846
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发表时间：
2016-04-01
影响因子：
3.1
通讯作者：
Kanny, Krishnan
中科院分区：
文献类型：
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作者：
Mohan, T. P.;Kanny, Krishnan
本研究重点研究由玉米淀粉衍生并填充蒙脱石纳米粘土填料的生物聚合物薄膜的热成型性。通过溶液流延和热成型制备纳米粘土浓度为 0 至 5wt% 的生物聚合物薄膜。结果表明，纳米粘土的添加提高了热成型样品的成型性（尺寸稳定性和堵塞性能），并且还取决于纳米复合材料结构和粘土浓度。由于剥离结构和聚合物基质中纳米粘土颗粒更好的分散，在 2-3wt% 纳米粘土浓度下观察到产品稳定性得到改善，性能得到优化。热重分析和动态力学分析显示最大值为27?分解温度提高，储能模量提高 12%，4? 5wt% 纳米粘土填充的生物聚合物薄膜的 T-g 增加。拉伸结果显示，3wt% 纳米粘土填充的生物聚合物系列的强度增加了 13%，模量增加了两倍，伸长率减少了 29%。
This study focuses on the thermoformability of biopolymer films derived from corn starch and filled with montmorillonite-based nanoclay fillers. Biopolymer films with nanoclay concentrations from 0 to 5wt% were prepared by solution casting and followed by thermoforming. The result shows that nanoclay addition improves the formability (dimensional stability and plugging property) of thermoformed specimen and also depends on the nanocomposite structure and clay concentration. Improved product stability with optimized properties was observed at 2-3wt% nanoclay concentration due to exfoliated structure and better nanoclay particle dispersion in the polymeric matrix. Thermogravimetric analysis and dynamic mechanical analysis show maximum of 27? increased decomposition temperature, 12% increased storage modulus and 4? increased T-g at 5wt% nanoclay-filled biopolymer film. Tensile result shows 13% increased strength, two-fold increased modulus and 29% reduced elongation for 3wt% nanoclay-filled biopolymer series.