摘要
纳米二氧化硅在水泥基复合材料中具有极大的潜力,但纳米颗粒在水泥基材料中的团聚问题限制了其发展。通过采用硅烷偶联剂对纳米二氧化硅进行改性,进而在其表面接枝异丁烯醇聚氧乙烯醚(TPEG),合成一系列改性纳米二氧化硅。试验结果表明,经TPEG改性后的纳米二氧化硅在碱性环境中有着更高、更稳定的分散性。相比于纳米二氧化硅,改性纳米二氧化硅可以更好地调控水泥水化进程并提高砂浆的物理力学性能。
Nano-silica has great potential in cement-based composites,but the agglomeration of nano particles in cement-based materials limits its development.A series of modified nano-silica were synthesized by grafting isobutylene alcohol polyoxyethylene ether(TPEG)on to the surface of nano silica modified by silane coupling agent.The results show that the nano-silica modified by TPEG has better dispersibility and stability in an alkaline environment.In addition,compared with nano-silica,modified silica can make the cement hydration process controllable and improve the physical and mechanical properties of the mortar.
作者
李长城
杨勇
冉千平
舒鑫
陈磊
LI Changcheng;YANG Yong;RAN Qianping;SHU Xin;CHEN Lei(State Key Laboratory of High Performance Civil Engineering Materials,Jiangsu Sobute New Materials Co.Ltd.,Nanjing 211103,China;School of Material Science and Engineering,Southeast University,Nanjing 211189,China)
出处
《新型建筑材料》
2022年第9期81-85,共5页
New Building Materials
基金
国家自然科学基金杰出青年基金项目(51825203)。
关键词
改性纳米二氧化硅
水化
分散性
力学性能
modified nano-silica
hydration
dispersion
mechanical properties
