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将单端氨基化聚乙二醇(PEG-NH2)接枝的石墨烯填充到聚偏氟乙烯(PVDF)基体中,通过溶液法制备了PEG@graphene/PVDF纳米复合材料,并借助扫描电子显微镜(SEM)、红外光谱(FTIR)、X射线衍射(XRD)、热重分析(TGA)以及阻抗分析仪等手段对复合材料的结构形貌及介电性能进行了分析表证。研究表明:改性的石墨烯具有较好的溶剂稳定性,能均匀分散在PVDF基体中,与基体界面结合良好;具有核壳结构的PEG@graphene有效提高了PVDF复合材料的介电常数,降低了介电损耗。PEG@graphene/PVDF质量分数3%复合材料的介电常数高达137,介电损耗为0.29(50 Hz)。
The grafted graphene with single-terminal aminated polyethylene glycol (PEG-NH2) was filled into polyvinylidene fluoride (PVDF) matrix. The PEG @ graphene / PVDF nanocomposites were prepared by solution method and characterized by scanning electron microscopy (SEM), FTIR, XRD, TGA and impedance analyzer were used to analyze the structure and dielectric properties of the composites. The results show that the modified graphene has good solvent stability, can be uniformly dispersed in the PVDF matrix and has a good bond with the matrix interface. The PEG @ graphene with the core-shell structure effectively improves the dielectric constant of the PVDF composite and reduces the dielectric constant Dielectric loss. PEG @ graphene / PVDF mass fraction 3% The composite has a dielectric constant of up to 137 and a dielectric loss of 0.29 (50 Hz).