作者：Haixin Zhang, Jianwen Chen, Xihua Cui, Yuexin Hu, Liangcai Lei, Yutian Zhu, Wei Jiang
关键字：导电聚合物复合材料, 双逾渗结构, 热退火, 电学性能, 碳纳米管
论文来源：期刊
具体来源：Composites Science and Technology, 2018, 167, 522-528
发表时间：2018年

摘要：研究发现，含有导电多壁碳纳米管（MWCNTs）的共连续聚苯乙烯（PS）/聚甲基丙烯酸甲酯（PMMA）共混物，其电学性能可通过热退火处理显著提高。利用在线流变仪和光学显微镜以及离线透射电子显微镜，直观观察了PS/PMMA/MWCNTs复合材料形貌和微结构的演化。结果表明，热退火可诱导小相合并为更完善的共连续相结构，从而显著提高复合材料的电学性能；此外，热退火下MWCNTs的重新聚集也有助于提高电学性能。值得注意的是，热退火过程中部分MWCNTs可富集在共连续PS/PMMA共混物的界面，构筑导电网络，进一步增强复合材料的电学性能。

Abstract：In the current study, it is found that the electrical properties of a co-continuous polystyrene (PS)/poly(methyl methacrylate) (PMMA) blend containing conductive multi-wall carbon nanotubes (MWCNTs) can be remarkably improved via the thermal annealing treatment. Utilizing the on-line (rheometer and optical microscope) and off-line (transmission electron microscopy) instruments, the evolution of the morphology and microstructure of PS/PMMA/MWCNTs composites are visualized. It is observed that thermal annealing can induce the coalescence of small phases into a more perfect co-continuous phase structure, which can significantly improve the electrical properties of the composites. Moreover, the re-aggregation of MWCNTs under thermal annealing also helps to improve the electrical properties of the composites. Furthermore, parts of MWCNTs can be enriched at the interface of a co-continuous PS/PMMA blend to build up the conductive network during the thermal annealing, which further enhances the electrical properties of the composites.

论文链接：https://doi.org/10.1016/j.compscitech.2018.08.048