表面改性纤维素微纤丝对聚乳酸力学性能改善的影响
Influence of surface modified cellulose microfibrils on the improved mechanical properties of poly (lactic acid).
作者信息
Johari Atul P, Kurmvanshi S K, Mohanty S, Nayak S K
机构信息
Laboratory for Advanced Research in Polymeric Materials (LARPM), CIPET, B-25, C.N.I. Complex, Patia, Bhubaneswar 751 024, India.
Laboratory for Advanced Research in Polymeric Materials (LARPM), CIPET, B-25, C.N.I. Complex, Patia, Bhubaneswar 751 024, India.
出版信息
Int J Biol Macromol. 2016 Mar;84:329-39. doi: 10.1016/j.ijbiomac.2015.12.038. Epub 2015 Dec 17.
Cellulose microfibrils (CMF) were extracted from sisal fiber and characterized. Biocomposites of PLA reinforced with CMF were fabricated employing melt blending technique followed by injection moulding. The biocomposites were subjected to various characterization studies to investigate the effect of CMF within the PLA matrix. Differential scanning calorimetry (DSC) measurements confirmed that the addition of CMF accelerates the crystallization process of PLA matrix. Addition of 5 wt.% of CMF with and without compatibilizers and plasticizers such as maleic anhydride, polyethylene glycol and acetyltributyl citrate in PLA improved the crystallization of PLA up to 100 °C. MA grafting gave moderate effects on both the stiffness and ductility, exhibiting optimum properties.
从剑麻纤维中提取并表征了纤维素微纤丝（CMF）。采用熔融共混技术随后进行注塑成型制备了用CMF增强的聚乳酸（PLA）生物复合材料。对这些生物复合材料进行了各种表征研究，以研究CMF在PLA基体中的作用。差示扫描量热法（DSC）测量证实，添加CMF可加速PLA基体的结晶过程。在PLA中添加5 wt.%的CMF，无论有无相容剂和增塑剂（如马来酸酐、聚乙二醇和乙酰柠檬酸三丁酯），均可将PLA在高达100°C时的结晶度提高。马来酸酐接枝对刚度和延展性均有适度影响，表现出最佳性能。
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