摘要
在聚合物基体中掺入少量的层状硅酸盐所制备的聚合物/粘土纳米复合材料,其阻隔性能明显地优于纯聚合物及其传统的复合材料.实验及分析结果表明,聚合物/粘土纳米复合材料的微观结构和阻隔性能主要受控于粘土剥离后的径厚比.一简单的重整化群模型被用来评估粘土几何因素(诸如径厚比、取向、剥离程度等)对聚合物/粘土纳米复合材料阻隔性能的影响,所得到的逾渗阈值及最佳粘土含量与实验结果吻合.
The barrier properties of polymer - clay nanocomposites with a small amount of inorganic layered - silicate fillers are remarkably superior to those of neat polymers or their conventional counterparts. The results show that the aspect ratio of exfoliated silicate platelets plays a critical role in controlling the microstructure of polymer - clay nanocomposites and their barrier properties. A simple renormalization group model is proposed to assess the influence of geometric factors （such as aspect ratio, orientation, and extent of exfoliation） of clay fillers on the barrier properties of polymer - clay nanocomposites. The estimated percolation thresholds of clay content for minimum permeability are in good agreement with experimental data.
出处
《物理》
CAS
北大核心
2006年第7期550-552,共3页
Physics
基金
澳大利亚研究局(ARC)资助项目
关键词
聚合物/粘土
纳米复合材料
剥离
阻隔
逾渗
重整化群
polymer/clay, nanocomposite, exfoliation, barrier, percolation, renormalization group
