用溶液插层法制备了PLA/MgAlCu-LDH共混溶液,通过涂膜法制备了不同MgAlCu-LDH含量的PLA/MgAlCu-LDH复合膜,采用扫描电镜(SEM)、红外光谱(FTIR)、X射线衍射(XRD)、力学性能测试仪器对制备的复合膜的形貌、结构及性能进行测试表征.结果表明:部分PLA分子链插入到MgAlCu-LDH片层间隙中,使得MgAlCu-LDH层间距变大,MgAlCu-LDH作为插层剂对整个共混聚合物的韧性和强度有明显的影响;PLA/MgAl-Cu-LDH复合材料的杨氏模量随MgAlCu-LDH含量的增加而增加,加入少量MgAlCu-LDH时PLA/MgAlCu-LDH复合材料的抗拉强度、屈服强度和断裂伸长率均增加,在室温下拉伸时,PLA/MgAlCu-LDH 3％(质量分数)复合材料的抗拉强度、屈服强度和断裂伸长率分别比PLA提高14.5％、11.5％和23.7％.
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