阿拉伯树胶处理下氧化石墨烯在水泥复合材料中的分散性研究

宋乔; 吴磊; 张宏江

doi:10.13204/j.gyjzG22112903

阿拉伯树胶处理下氧化石墨烯在水泥复合材料中的分散性研究

doi: 10.13204/j.gyjzG22112903

1. 河南建筑职业技术学院土木工程系, 郑州 450064;
2. 中交第二航务工程局有限公司, 武汉 430040;
3. 武汉理工大学硅酸盐建筑材料国家重点实验室, 武汉 430070

基金项目:

国家自然科学基金项目(52008321)。

详细信息

作者简介:
宋乔,女,1980年出生,硕士,副教授。电子信箱:dvd1255@163.com

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出版历程
- 收稿日期: 2022-11-29

Investigation on Dispersion of Graphene Oxide in Cement Composite Using Gum Arabic

1. Department of Civil Engineering, Henan Technical College of Construction, Zhengzhou 450064, China;
2. CCCC Second Harbor Engineering Co., Ltd., Wuhan 430040, China;
3. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China

摘要

摘要: 氧化石墨烯(GO)已被证明可显著改善水泥复合材料的力学性能,而GO的分散性是影响复合材料性能增强的关键因素。以阿拉伯树胶(GA)为分散剂,采用光学显微镜、紫外分光光度计(UV-vis)和透射电镜(TEM)分析了GO在不同溶液中的分散稳定性,并制备了水泥复合材料。结果表明:高碱度和Ca²⁺是导致GO在水泥浆料中团聚的主要因素;添加阿拉伯树胶可确保GO在水泥模拟孔隙溶液中稳定分散;在阿拉伯树胶做分散剂的情况下,掺杂0.03%GO可使水泥复合材料的28 d抗折和抗压强度分别提高24.85%和42.11%;微观形貌显示阿拉伯树胶处理下的GO可促进水泥内部棒状晶体的形成,增强了结构密实性;以上均表明该分散方式可用于制备GO增强水泥复合材料。
- 氧化石墨烯 /
- 阿拉伯树胶 /
- 水泥 /
- 分散性 /
- 模拟孔隙溶液
Abstract: Graphene oxide (GO) has been shown to significantly improve the mechanical properties of cement composites, and the dispersity of GO is a key factor affecting the performance enhancement of composites. In this paper, gum arabic (GA) was used as dispersant, the dispersion stability of GO in different solutions was analyzed by optical microscope, ultraviolet spectrophotometer (UV-vis) and transmission electron microscope (TEM), and cement composites were prepared. The results showed that high alkalinity and calcium ions were key factors inducing the agglomeration of GO in cement. The addition of GA could ensure the stable dispersion of GO in the cement simulated pore solution. The 28 d flexural and compressive strengths of 0.03%GO cement composites doped with GA increase by 24.85% and 42.11%, respectively. The morphological analysis showed that GO treated with GA promoted the formation of rod-like crystals inside the cement and enhanced the structural compactness. Therefore, this dispersion route could be successfully used for the preparation of GO reinforced cement composites.
- graphene oxide /
- gum arabic /
- cement /
- dispersion /
- simulated pore solution

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参考文献(14)

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