Microwave-accelerated synthesis of silica nanoparticle-coated graphite nanoplatelets and properties of their epoxy composites

被引：14

作者：

Choi, Seongcheol ^{[1
]}

Yang, Jungeun ^{[1
]}

Kim, Yeongseon ^{[1
]}

Nam, Jeonghoon ^{[1
]}

Kim, Kyunghee ^{[1
]}

Shim, Sang Eun ^{[1
]}

机构：

[1] Inha Univ, Dept Chem & Chem Engn, Inchon 402751, South Korea

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 2014年 / 103卷

关键词：

Nano composites; Microwave processing; Mechanical properties; Electrical properties; Thermal properties; THERMAL-CONDUCTIVITY; CARBON NANOTUBE; GRAPHENE; FUNCTIONALIZATION; NANOCOMPOSITES; NANOSHEETS;

D O I：

10.1016/j.compscitech.2014.08.003

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

Silica nanoparticle-coated graphite nanoplatelets (GNPs) as a thermally conductive and electrically insulating filler for epoxy composites were prepared by a base-catalyzed sol-gel reaction with polyvinylpyrrolidone-modified GNPs under microwave irradiation for 5 min. The surface resistivity of the silica nanoparticle-coated GNPs increased to 1.62 x 10(4) Omega/sq from 1.16 x 10(1) Omega/sq for the raw GNPs because the silica nanoparticles provide an electrically insulating property. Moreover, the silica nanoparticle-coated GNPs/epoxy composite at a 2 wt% filler loading ratio retained an electrical insulating value of 9.68 x 10(12) Omega/sq. The silica nanoparticle-coated GNPs/epoxy composites significantly enhanced the thermal conductivity and the critical stress intensity factor of the composite at 2 wt% filler loading by 77.6% and 34.1%, respectively. On the other hand, the mechanical properties of raw GNPs/epoxy composite were decreased by the addition of GNPs. The increased properties of silica-coated GNPs/epoxy composites were explained in terms of the formation of strong interactions with filler and epoxy matrix. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：8 / 15

页数：8

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