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Open AccessArticle

Interfacial Engineering of Graphene Nanosheets at MgO Particles for Thermal Conductivity Enhancement of Polymer Composites

1
Analytical and Testing Center, Sichuan University, Chengdu 610065, China
2
Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095, USA
*
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(5), 798; https://doi.org/10.3390/nano9050798
Received: 18 April 2019 / Revised: 19 May 2019 / Accepted: 21 May 2019 / Published: 24 May 2019
An important task in facilitating the development of thermally conducting graphene/polymer nanocomposites is to suppress the intrinsically strong intersheet π-π stacking of graphene, and thereby to improve the exfoliation and dispersion of graphene in the matrix. Here, a pre-programmed intercalation approach to realize the in situ growth of graphene nanosheets at the inorganic template is demonstrated. Specifically, microsized MgO granules with controlled geometrical size were synthesized using a precipitation method, allowing the simultaneous realization of high surface activity. In the presence of a carbon and nitrogen source, the MgO granules were ready to induce the formation of graphene nanosheets ([email protected]), which allowed for the creation of tenacious linkages between graphene and template. More importantly, the incorporation of [email protected] into polymer composites largely pushed up the thermal conductivity, climbing from 0.39 W/m∙K for pristine polyethylene to 8.64 W/m∙K for polyethylene/[email protected] (60/40). This was accompanied by the simultaneous promotion of mechanical properties (tensile strength of around 30 MPa until 40 wt % addition of [email protected]), in contrast to the noteworthy decline of tensile strength for MgO-filled composites with over 20 wt.% fillers. View Full-Text
Keywords: graphene; polymer composites; thermal conductivity; interfacial adhesion graphene; polymer composites; thermal conductivity; interfacial adhesion
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MDPI and ACS Style

Pan, W.; He, M.; Zhang, L.; Hou, Y.; Chen, C. Interfacial Engineering of Graphene Nanosheets at MgO Particles for Thermal Conductivity Enhancement of Polymer Composites. Nanomaterials 2019, 9, 798.

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