对MOC粘合剂的粘合性能和微观结构的调查 SiO2作为岩石类复合材料
Jie Jing1,2,3, Hongbo Li1,3, Xin Zheng1,2,3
1Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China.
Materials (Basel, Switzerland)
|August 29, 2024
概括
氧化水泥 (MOC) 显示出作为碳封存的岩石类材料的潜力. 最佳条件包括5%的湿度用于早期强度和60%的持续水合,粘合剂含量为15-25%.
科学领域:
- 材料科学 材料科学 材料科学
- 地质化学 地质化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 自然岩石的异质性挑战了碳捕集研究和实验性可重复性.
- 识别合适的岩石类材料对于可靠的碳封存研究至关重要.
研究的目的:
- 为了研究湿度,粘合剂含量,固化期和冷压对氧化水泥 (MOC) 键强度的影响.
- 在SiO2-MgO-MgCl2系统中分析MOC水合反应,并将微观结构与粘合特征相关联.
主要方法:
- 采用了正交测试来系统地评估影响MOC键强度的各种因素.
- 使用X射线衍射 (XRD) 和扫描电子显微镜 (SEM) 来分析MOC的水分和微观结构.
- 该研究使用了MgO到MgCl2-6H2O到H2O (7:1:18) 的特定摩尔比率.
主要成果:
- 5%的相对湿度显著提高了7天的MOC债券强度.
- 在60%的相对湿度下固化促进了强度贡献阶段的水合.
- 最佳的粘合剂含量 (15-25%) 导致了优越的强度和刚性.
- 冷压提供了最初的结合效益,但导致了长期解决损失问题.
结论:
- 氧化 - 氧化 - 化系统表现出极好的早期强度和弹性.
- 这种基于MOC的系统是一个有希望的候选人,作为碳封存应用的岩石类材料.
- 控制湿度和粘合剂含量等环境因素是优化MOC性能的关键.
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