硅烷改性氧化石墨烯增强水泥砂浆的力学性能和抗渗性能

doi:10.16552/j.cnki.issn1001-1625.2024.1617

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (7): 2419-2428.DOI: 10.16552/j.cnki.issn1001-1625.2024.1617

硅烷改性氧化石墨烯增强水泥砂浆的力学性能和抗渗性能

黄巍林¹, 于巾茹¹, 尚君¹, 王忠堂²

1.青岛酒店管理职业技术学院酒店工程学院,青岛 266100;
2.青岛腾远设计事务有限公司,青岛 266100

收稿日期:2024-12-26 修订日期:2025-03-22 出版日期:2025-07-15 发布日期:2025-07-24
通信作者: 于巾茹,讲师。E-mail:yujru1225@163.com
作者简介:黄巍林(1988—),女,讲师。主要从事建筑工程方面的研究。E-mail:Huangweilin202411@163.com
基金资助:
山东省自然科学基金面上项目(ZR202103020358)

Mechanical Properties and Permeability Resistance of Silane-Modified Graphene Oxide Enhanced Cement Mortar

HUANG Weilin¹, YU Jinru¹, SHANG Jun¹, WANG Zhongtang²

1. Hotel Engineering Department, Qingdao Vocational and Technical College of Hotel Management, Qingdao 266100, China;
2. Qingdao Tengyuan Design Institute Co., Ltd., Qingdao 266100, China

Received:2024-12-26 Revised:2025-03-22 Published:2025-07-15 Online:2025-07-24

摘要/Abstract

摘要： 为提高混凝土在恶劣环境的使用性能,本研究采用溶胶-凝胶法制备γ-(2,3-环氧丙氧)丙基三甲氧基硅烷(GOPS)改性氧化石墨烯(GO),获得硅烷化氧化石墨烯(fGO)。然后用fGO填充水泥砂浆,测定其力学性能。采用X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、拉曼光谱(Raman)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)对材料进行表征。结果表明,与GO相比,fGO结构呈松散的层状,硅氧烷分子通过Si—O—C键与GO接枝。与对照组相比,fGO对水泥坍落度和坍落扩展度的影响较小。当fGO掺量为0.06%(质量分数)时,水泥砂浆的28 d抗折强度和抗压强度分别提升26.36%和36.29%,毛细吸水率和氯离子扩散系数分别降低56.64%和33.16%。热重和微观分析表明,fGO改善了水化产物的形态,增强了水化产物与砂粒的黏结性,整体提高了硅酸盐网络的完整性和稳定性。

关键词: 水泥砂浆, 氧化石墨烯, 硅烷, 氯离子扩散系数, 强度

Abstract: In order to improve the performance of concrete in harsh environments, γ-(2,3-epoxypropoxy) propyltrimethoxysilane (GOPS) modified graphene oxide (GO) was prepared by sol-gel method to obtain silylated graphene oxide (fGO). Then the cement mortar was filled with fGO and its mechanical properties were measured. The materials were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that compared with GO, the fGO structure is loosely layered, and the siloxane molecules are grafted with GO through the Si—O—C bond. Compared with the control group, fGO has little effect on the slump and slump flow of cement. When the content of fGO is 0.06% (mass fraction), the 28 d flexural strength and compressive strength of cement mortar increase by 26.36% and 36.29%, respectively, and the capillary water absorption and chloride ion diffusion coefficient decrease by 56.64% and 33.16%, respectively. Thermogravimetric and microscopic analysis show that fGO improved the morphology of hydration products, enhance the adhesion between hydration products and sand particles, and improve the integrity and stability of silicate network as a whole.

Key words: cement mortar, graphene oxide, silane, chloride ion diffusion coefficient, strength

中图分类号:

TU525

黄巍林, 于巾茹, 尚君, 王忠堂. 硅烷改性氧化石墨烯增强水泥砂浆的力学性能和抗渗性能[J]. 硅酸盐通报, 2025, 44(7): 2419-2428.

HUANG Weilin, YU Jinru, SHANG Jun, WANG Zhongtang. Mechanical Properties and Permeability Resistance of Silane-Modified Graphene Oxide Enhanced Cement Mortar[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(7): 2419-2428.

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硅烷改性氧化石墨烯增强水泥砂浆的力学性能和抗渗性能

Mechanical Properties and Permeability Resistance of Silane-Modified Graphene Oxide Enhanced Cement Mortar

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