Functionalized graphite nanoplatelets/epoxy resin nanocomposites with high thermal conductivity. (January 2016)

• Record Type: Journal Article
• Authors: Gu, Junwei; Yang, Xutong; Lv, Zhaoyuan; Li, Nan; Liang, Chaobo; Zhang, Qiuyu
• Is Part Of: International journal of heat and mass transfer. Volume 92(2016:Jan.)
• Page Start: 15
• Page End: 22
• Publication Date: 2016-01
• Subjects: Thermally conductive nanocomposites -- Graphite nanoplatelets (GNPs) -- Bisphenol-A epoxy resin (E-51) -- Surface functionalization; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Electronic journals; 621.4022
• DOI: 10.1016/j.ijheatmasstransfer.2015.08.081
• Languages: English
• ISSNs: 0017-9310

Abstract

Highlights: KH-560 molecules have been successfully grafted on the GNPs' surface. Thermal conductivity of f GNPs/E-51 nanocomposite with 30 wt% f GNPs is 1.698 W/mK. Thermal stabilities of the nanocomposites are increased with the addition of f GNPs. Abstract: Graphite nanoplatelets (GNPs) are performed to fabricate GNPs/bisphenol-A epoxy resin (GNPs/E-51) nanocomposites with high thermal conductivity via casting method. And the "two-step" method of methanesulfonic acid/γ-glycidoxypropyltrimethoxysilane (MSA/KH-560) is introduced to functionalize the surface of GNPs ( f GNPs). The KH-560 molecules have been successfully grafted onto the surface of GNPs. The thermal conductivities of the f GNPs/E-51 nanocomposites are increased with the increasing addition of f GNPs, and the corresponding thermally conductive coefficient of the f GNPs/E-51 nanocomposites is improved to 1.698 W/mK with 30 wt% f GNPs, 8 times higher than that of original E-51 matrix. The flexural strength and impact strength of the f GNPs/E-51 nanocomposites are optimal with 0.5 wt% f GNPs. The thermal stabilities of the f GNPs/E-51 nanocomposites are also increased with the increasing addition of f GNPs. For a given GNPs loading, the surface functionalization of GNPs by MSA/KH-560 exhibits a positive effect on the thermal conductivities and mechanical properties of the nanocomposites.