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Preparation and properties of plasticized poly(lactic acid) nano-composite with modified organo-montmorillonites
Author(s): LEI Hai-fen, WANG Peng, ZHANG Ying-min, YUAN Wei-bo
Pages: 457-
461
Year: 2009
Issue:
4
Journal: Materials Science and Technology
Keyword: GetLinkList(KeywordFilter('聚乳酸; 有机蒙脱土; 纳米复合材料; 熔融插层'); 'kw'; 'CJFD');
Abstract: 为改善聚乳酸(PLA)性脆、断裂形变小、韧性差、热稳定性差等问题,采用稀土镧表面改性有机蒙脱土(La-OMMT)对聚乳酸(PLA)进行熔融插层改性,并利用聚乙二醇400(PEG-400)进行增塑改性,最终制备出聚乙二醇增塑聚乳酸/蒙脱土纳米复合材料PLA/La-OMMT/PEG-400.实验结果表明,La-OMMT的加入,提高了复合材料的拉伸强度、弯曲强度和无缺口冲击强度,而PEG-400的加入,在保证复合材料具备一定强度的前提下,显著提高了复合材料的韧性和断裂伸长率.XRD,TEM和SEM结果表明,La-OMMT主要以剥离状态分散在PLA基体中,且La-OMMT和PEG-400的加入,使材料拉伸断面由脆性断裂向韧性断裂转变,由此扩大了PLA的应用范围.
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