采用熔融插层法在聚乙二醇的增塑作用下制备了醋酸纤维素/蒙脱土(CA/MMT)生物纳米复合材料.利用X射线衍射和透射电镜表征了CA/MMT纳米复合材料的插层结构.X射线衍射结果表明,复合后蒙脱土的层间距增大;透射电镜照片显示,蒙脱土在CA基体中达到纳米级分散,且分散均匀.CA/MMT纳米复合材料的力学性能得到较大提高,加入5 phr有机蒙脱土时,复合材料的拉伸强度从纯增塑CA的38.8 MPa增到48.2 MPa.动态力学测试表明复合材料的储能模量增大,玻璃化转变温度提高.
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