作者：孙小菊

作者单位：郑州升达经贸管理学院建筑工程学院，河南 郑州 451191

关键词：氨基化;氧化石墨烯;水泥;抗折强度;抗压强度

摘要：

该文制备氨基化氧化石墨烯，研究不同掺量下氧化石墨烯和氨基化氧化石墨烯对水泥强度的影响。采用X射线衍射仪（XRD）、傅里叶变换红外光谱仪（FTIR）、扫描电子显微镜（SEM）和透射电镜（TEM）对材料结构进行表征。结果表明，与对照水泥相比，掺杂0.15 %氧化石墨烯的水泥28 d抗折和抗压强度分别为7.65 MPa和64 MPa，提高10.87%和21.44%；而掺杂0.15 %氨基化氧化石墨烯的水泥28 d抗折和抗压强度分别为7.98 MPa和72.81 MPa，提高15.65%和38.16%；微观分析表明，氨基化氧化石墨烯促进水泥内部形成紧密交联的粗柱晶体，提高水泥的力学性能。

Research and preparation of NH₂-GO cement-based composite
SUN Xiaoju
School of Architectural Engineering, ZhengZhou Shengda Econnomics and Mangement College, Zhengzhou 451191, China
Abstract: In this study, NH₂-functional graphene oxide (NH₂-GO) was prepared, effects of GO and NH₂-GO on the cement at different dosage were investigated. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM) were used to characterize the material structure. The results showed that the 28 d flexural strength and compressive strength of the cement doped with 0.15% GO were 7.65 MPa and 64 MPa, increased by 10.87% and 21.44%, respectively. The 28 d flexural strength and compressive strength of cement doped with 0.15% NH₂-GO were 7.98 MPa and 72.81 MPa, increased by 15.65% and 38.16%, respectively. The morphological analysis showed that NH₂-GO promoted the formation of cross-linked hydrates in the cement matrix, which improved the mechanical properties of the cement.
Keywords: NH₂-functional;graphene oxide;cement;flexural strength;compressive strength
2020, 46(11):158-162  收稿日期: 2020-03-26;收到修改稿日期: 2020-05-03
基金项目: 河南省科技攻关项目（172102310253）
作者简介: 孙小菊(1984-),女,河南驻马店市人,讲师,硕士,主要从事桥梁、隧道的施工及建筑材料优化的研究
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