Weng Ling, Yan Li-Wen, Li Hong-Xia, Liu Li-Zhu
J Nanosci Nanotechnol. 2016 Feb;16(2):1638-44. doi: 10.1166/jnn.2016.10720.
Silver nanorods/polyimide (Ag-NRs/PI) nanocomposites with high conductivity (An order of magnitude higher than pure PI), frequency-independent dielectric permittivity (3.8-4.2) and low dielectric loss (<0.05) were prepared by an in-situ polymerization process. Ag-nanorods with a mean width of approximately 300 nm and an average length over 8 microm were synthesized in the presence of polyvinylpyrrolidone (PVP) and NaCl by polyol process. SEM images showed that metallic Ag-nanorods were well dispersed in PI matrix. The structure of Ag-NRs was not destroyed or changed in nanocomposite films and the order of PI molecular chains was maintained as well. The orientation of the Ag-NRs in the PI matrix improved the mechanical properties of nanocomposite films. TGA results showed that the thermal property of nanocomposite films was almost as good as pure PI.
通过原位聚合工艺制备了具有高导电性（比纯聚酰亚胺高一个数量级）、与频率无关的介电常数（3.8 - 4.2）和低介电损耗（<0.05）的银纳米棒/聚酰亚胺（Ag-NRs/PI）纳米复合材料。在聚乙烯吡咯烷酮（PVP）和氯化钠存在的情况下，通过多元醇法合成了平均宽度约为300 nm且平均长度超过8微米的银纳米棒。扫描电子显微镜（SEM）图像显示金属银纳米棒在聚酰亚胺基体中分散良好。在纳米复合薄膜中，Ag-NRs的结构未被破坏或改变，聚酰亚胺分子链的有序性也得以保持。Ag-NRs在聚酰亚胺基体中的取向改善了纳米复合薄膜的机械性能。热重分析（TGA）结果表明，纳米复合薄膜的热性能几乎与纯聚酰亚胺一样好。
