The Epoxy-based Ionic Liquid/carboxylated multi-walled carbon nanotubes/polybutylene terephthalate nanocomposites (EPIL/c-MWCNTs/PBT) were prepared through melt-blending method. Due to π_cation-π interactions between EPIL and c-MWCNTs, and the reaction of a carboxyl group of PBT matrices with an epoxy group of EPIL, the c-MWCNTs displayed a homogeneous dispersion in the EPIL/c-MWCNTs/PBT, which could present better electrical properties than that of c-MWCNTs/PBT composites. SEM results presented that the compatibility between of c-MWCNTs and PBT had been improved due to the excellent dispersibility of c-MWCNTs in PBT matrix Meanwhile, the crystallization temperature of EPIL/c-MWCNTs/PBT also increased to 213.4 °C, higher than that of c-MWCNTs/PBT and pure PBT. Furthermore, the EPIL/c-MWCNTs/PBT nanocomposites showed excellent 3D conducting network and exhibited a low conductivity of percolation threshold when the loading of c-MWCNTs was only 0.7 wt%. The addition of EPIL and c-MWCNTs to PBT could effectively increase the dielectric constant and the uniformly dispersed c-MWCNT in low dielectric loss, which opened a new direction for the fabrication of EPIL/c-MWCNTs/polymer nanocomposites.

通过熔融共混法制备了环氧树脂基离子液体/羧化多壁碳纳米管/聚对苯二甲酸丁二醇酯纳米复合材料（EPIL / c-MWCNTs / PBT）。由于π_阳离子EPIL和c-MWCNT之间的-π相互作用，以及PBT基质的羧基与EPIL的环氧基的反应，c-MWCNT在EPIL / c-MWCNTs / PBT中显示出均匀的分散性，可以表现出更好的电性能性能比c-MWCNTs / PBT复合材料好。SEM结果表明，由于c-MWCNTs在PBT基质中的优异分散性，提高了c-MWCNTs与PBT的相容性。同时，EPIL / c-MWCNTs / PBT的结晶温度也提高到213.4°C，高于c-MWCNTs / PBT和纯PBT的。此外，当c-MWCNTs的负载量仅为0.7 wt％时，EPIL / c-MWCNTs / PBT纳米复合材料表现出优异的3D导电网络，并表现出较低的电导率。