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首页> 外文期刊>International Journal of Electrochemical Science >Functionalization of Graphene and Dielectric Property Relationships in PVDF/graphene Nanosheets Composites
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Functionalization of Graphene and Dielectric Property Relationships in PVDF/graphene Nanosheets Composites

机译：PVDF /石墨烯纳米片复合材料中石墨烯的功能化和介电性能关系

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In this paper, a series of the functionalized graphenes, such as graphene oxide (GO), reduced graphene oxide (rGO), carboxylated graphene oxide (GOCOOH), reduce carboxylated graphene oxide (rGOCOOH), fluorinated graphene oxide (GOF), and reduce fluorinated graphene oxide (rGOF), were successfully fabricated, and were introduced into the Poly (vinylidene fluoride) (PVDF) matrix to form composites. The effects of these functional groups on dielectric properties of GO/PVDF composites were systematically investigated. The results show that the reduced functional graphene/PVDF composites (rGOCOOH/PVDF, rGOF/PVDF) exhibit more excellent dielectric properties than that of composite samples without undergoing the reduction reaction (GOCOOH/PVDF, GOF/PVDF). The reduced samples not only possess high dielectric constant, but also maintain lower dielectric loss. And, the rGOCOOH/PVDF composite has better dielectric properties (?r = 17.64, tg? = 0.031) than others, due to strong interfacial and dipolar interactions between PVDF matrix and fillers. These results could be used as a guide to tune dielectric properties of polymer/ graphene composites for their applications in embedded capacitors.
机译：本文研究了一系列功能化的石墨烯，例如氧化石墨烯（GO），还原氧化石墨烯（rGO），羧化氧化石墨烯（GOCOOH），还原羧化氧化石墨烯（rGOCOOH），氟化石墨烯（GOF）和还原氟化氧化石墨烯（rGOF）已成功制备，并被引入聚偏二氟乙烯（PVDF）基体中以形成复合材料。系统地研究了这些官能团对GO / PVDF复合材料介电性能的影响。结果表明，与未经历还原反应（GOCOOH / PVDF，GOF / PVDF）的复合材料样品相比，具有还原功能的石墨烯/ PVDF复合材料（rGOCOOH / PVDF，rGOF / PVDF）具有更优异的介电性能。减少的样品不仅具有高介电常数，而且保持较低的介电损耗。而且，由于PVDF基体和填料之间的强界面和偶极相互作用，rGOCOOH / PVDF复合材料具有更好的介电性能（Δr= 17.64，tgα= 0.031）。这些结果可以用作调整聚合物/石墨烯复合材料在嵌入式电容器中应用的介电性能的指南。

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