热压制备改性石墨烯-水泥基复合材料:改善微观结构、导热性能和力学性能

doi:10.11896/j.issn.1005-023X.2018.10.025

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Abstract Using silane coupling-agent-modified graphene, a series of graphene-reinforced cement-based composites (differing in coupling agent content and ball milling duration)were prepared by a hot-pressing process and the resultant composites’ perfor-mances were examined. X-ray diffraction(XRD), scanning electron microscopy(SEM), Fourier transform infrared spectroscopy(FTIR)and N₂ absorption BET surface area analyser were employed to study microstructure of the composite. The results showed that the combination of a 1% dosage of coupling agent and a 1% dosage graphene can achieve a thermal conductivity and a compressive strength of 3.132 3 W/(m·K)and 54.9 MPa (42.07% and 28.87% higher than the composite without coupling agent modification), respectively; the ball milling can improve the dispersibility of graphene in composite, and when the milling time, graphene dosage and coupling agent dosage are 0.5 h,1.5%,1% respectively, a reinforced cement-based composite with a thermal conductivity of 3.687 2 W/(m·K)and a compressive strength of 57.4 MPa can be obtained. The microstructure and pore structure analysis showed that the composite prepared by hot-pressing process has lower porosity and more dense structure than the blank sample.

Key words： hot pressing process cement graphene porosity

Published: 06 July 2018

CLC number:

TB332

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	Articles by authors
	WU Qisheng
	CHEN Baorui
	ZHU Huajun
	MIN Zhian

Cite this article:

WU Qisheng,CHEN Baorui,ZHU Huajun, et al. Preparing Modified-graphene-reinforced Cement-based Composite Material by Hot-pressing Process for Microstructure, Thermal Conductivity and Mechanical Properties Amelioration[J]. Materials Reports, 2018, 32(10): 1701-1706.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.10.025 OR http://www.mater-rep.com/EN/Y2018/V32/I10/1701

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