Abstract PVDF-TrFE/SWCNT nanocomposites with outstanding electromechanical properties were produced using P3HT-PMMA block copolymers as a compatibilizer between PVDF-TrFE and SWCNT. P3HT-PMMA block copolymer coated SWCNT (PTMCNT) was first prepared to utilize π-π stacking interactions between SWCNT and the P3HT block segment. The obtained PTMCNTs are highly compatible with the PVDF-TrFE matrix due to strong hydrogen bonding interaction between the polymer matrix and the PMMA block segment on the surface of SWCNT, leading to a very low percolation behavior at 0.05 wt% of SWCNT in PVDF-TrFE. The obtained electroactive PVDF-TrFE/SWCNT nanocomposites showed ca. 50 times increased electromechanical thickness strain, ca. 3200 times increased elastic energy density, and ca. 460 times increased electrical-to-mechanical energy conversion rate in comparison to those of pristine PVDF-TrFE at the relatively low electric field (50 Vppμm-1). These outstanding properties result from the ultra-low percolation of SWCNT along with uniform local field distribution in PVDF-TrFE, which kept not only intrinsic properties of PVDF-TrFE such as all-trans formed crystalline phase and softness but also enhanced electrical properties including dielectric constant.

中文翻译：

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使用高效聚合物增容剂高度增强 PVDF-TrFE/SWCNT 纳米复合材料的机电性能

摘要 使用 P3HT-PMMA 嵌段共聚物作为 PVDF-TrFE 和 SWCNT 之间的增容剂，制备了具有优异机电性能的 PVDF-TrFE/SWCNT 纳米复合材料。P3HT-PMMA 嵌段共聚物涂覆的 SWCNT（PTMCNT）首先被制备，以利用 SWCNT 和 P3HT 嵌段链段之间的 π-π 堆积相互作用。由于聚合物基体与 SWCNT 表面上的 PMMA 嵌段链段之间的强氢键相互作用，获得的 PTMCNTs 与 PVDF-TrFE 基体高度相容，导致 PVDF-TrFE 中 SWCNT 在 0.05 wt% 时的渗透行为非常低. 获得的电活性 PVDF-TrFE/SWCNT 纳米复合材料显示出约。机电厚度应变增加 50 倍，约 弹性能量密度增加 3200 倍，约 在相对较低的电场 (50 Vppμm-1) 下，与原始 PVDF-TrFE 相比，电机械能转换率提高了 460 倍。这些优异的性能源于 SWCNT 的超低渗透以及 PVDF-TrFE 中均匀的局部场分布，不仅保持了 PVDF-TrFE 的固有特性，如全相变晶相和柔软度，而且还增强了电性能，包括介电性不变。