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首页> 外文期刊>Journal of Applied Polymer Science >Enhanced biodegradation and processability of biodegradable package from poly(lactic acid)/poly(butylene succinate)/rice-husk green composites
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Enhanced biodegradation and processability of biodegradable package from poly(lactic acid)/poly(butylene succinate)/rice-husk green composites

机译：来自聚（乳酸）/聚（丁二酸酯）/稻壳绿色复合材料的可生物降解包装的生物降解和可加工性

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摘要

This work aims to study the possibility to process PLA/PBS/RH green composites into hexagonal plant-pots employing a large-scale industrial operation using injection molding. Green composites based on poly(lactic acid) (PLA), poly(butylene succinate) (PBS), and rice husk (RH) with various RH contents (10-30%wt.) were produced successfully using a twin-screw extruder. The compatibility of RH-matrix was improved by chemical surface modifications using a coupling agent. RH was analyzed as an effective filler for PLA to develop green composites with low cost, high biodegradability, improved processability, and comparable mechanical properties as unfilled PLA. With increasing RH content, tensile modulus of the composites increased gradually. The addition of PBS, at PLA/PBS ratio of 60/40, improved the elongation at break and impact strength of PLARH30 by 55% and 7.1%, respectively. The suitable processing temperatures for PLA decreased from 220-230 degrees C to 170-180 degrees C when 30%wt. RH was composited into PLA matrix and were further reduced when PBS was applied. After biodegradation via either enzymatic degradation or hydrolysis, surface erosion with a large number of voids, mass loss, and the substantial decrease in tensile strength of all the composites were observed. In addition, the biodegradation of the composites has been improved by the addition of either RH or PBS.
机译：本工作旨在研究利用注射成型大规模工业操作将PLA/PBS/RH绿色复合材料加工成六边形植物花盆的可能性。利用双螺杆挤出机成功地制备了以聚乳酸（PLA）、聚丁二酸丁二醇酯（PBS）和稻壳（RH）为基料、不同RH含量（10-30%重量）的绿色复合材料。通过使用偶联剂进行化学表面改性，改善了RH基体的相容性。RH被分析为PLA的有效填料，以开发成本低、生物降解性高、可加工性好、机械性能与未填充PLA相当的绿色复合材料。随着RH含量的增加，复合材料的拉伸模量逐渐增大。在PLA/PBS比为60/40时，PBS的加入使PLARH30的断裂伸长率和冲击强度分别提高了55%和7.1%。当30%wt.RH被复合到PLA基质中时，PLA的合适加工温度从220-230℃降低到170-180℃，并且当施加PBS时进一步降低。在通过酶降解或水解进行生物降解后，观察到所有复合材料的表面侵蚀和大量孔隙、质量损失，以及拉伸强度的大幅降低。此外，RH或PBS的加入改善了复合材料的生物降解性能。

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