Effect of SiO2@PEGMA Composites on Mechanical Properties of Oil Well Cement

被引:3
作者
Wang, Gang [3 ,4 ]
Tan, Hua [3 ]
Lu, Chunjing [1 ]
Sun, Ao [2 ]
机构
[1] Northeast Petr Univ, Sch Petr Engn, Daqing 163318, Peoples R China
[2] Zhejiang Univ, Ctr Chem Frontier Technol, Hangzhou 310058, Peoples R China
[3] Guangdong Univ Petrochem Technol, Sch Chem, Maoming 525000, Peoples R China
[4] Guangdong Univ Petrochem Technol, Guangdong Prov Key Lab Petrochem Pollut Proc & Con, Maoming 525000, Peoples R China
关键词
COMPRESSIVE STRENGTH; SIO2; NANOPARTICLES; NANO-SIO2; PERFORMANCE; SILICA; NANOCOMPOSITES; AGGLOMERATION; HYDRATION; KINETICS; PASTE;
D O I
10.1021/acsomega.2c03202
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
SiO2@PEGMA composites were synthesized by grafting poly(ethylene glycol) methacrylate (PEGMA) on SiO2 nanoparticles via radical polymerization. The chemical structures of the SiO2@PEGMA composites were analyzed by Fourier transform infrared, H-1 NMR, and transmission electron microscopy methods. The mechanical and fresh properties, hydration products, heat of hydration, microtopography, and pore structures were studied. The shell formed by the grafted PEGMA gave the SiO2@PEGMA composite a steric hindrance effect, which enabled it to have excellent dispersion stability even in the cement pore solution. The SiO2@PEGMA composites could not only effectively facilitate hydration reaction and generate calcium silicate hydrate (C-S-H) through the seeding effect but also make the pore structure more compact by the filling effect. Compared with other control groups, SiO2@PEGMA composites could obviously enhance the compressive strength of cement samples, which was increased by 36.7% after curing for 28 days.
引用
收藏
页码:24012 / 24019
页数:8
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