还原氧化石墨烯增强水泥基复合材料微观结构及力学性能

采用水热还原法制备了不同还原程度的还原氧化石墨烯(RGO),并将其添加到水泥浆体中,制得石墨烯增强水泥基复合材料。采用傅里叶变换红外光谱(FT-IR)、力学性能测试仪、扫描电子显微镜(SEM)对氧化石墨烯(GO)还原程度及水泥基复合材料的力学性能和微观结构进行测试。结果表明,在120℃水热条件下,控制不同还原时间可以得到不同还原程度的RGO;随着GO还原程度的提高,复合材料力学强度不断增加;RGO可使水泥更加密实,降低了水泥浆体的孔隙率,对水泥基复合材料起到增强增韧的作用。

Microstructure and Mechanical Properties of Reduced Graphene Oxide Reinforced Cement-based Composites

Reduced graphene oxide (RGO) with different degrees of reduction has been prepared by the hydrothermal reduction method and then was added to cement slurry to obtain grapheme-reinforced cement-based composites. Subsequently, the reduction degree of graphene oxide (GO), mechanical properties and microstructure of cement-based composites were characterized by Fourier Transform infrared spectroscopy (FT-IR), mechanical property tester and scanning electron microscopy (SEM). The results show that under the hydrothermal temperature of 120 °C, RGO with different reduction degrees can be obtained by controlling the reduction time; with the increase of GO reduction degrees, the mechanical strength of composites increases constantly; RGO can make the cement more compact, which reduces the porosity of the cement slurry and plays an important role in strengthening and toughening the cement-based composite materials.