A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Synthesis of nanoSiO2@PCE core-shell nanoparticles and its effect on cement hydration at early age
Highlights A series of NS@PCE with different core-shell ratios were synthesized. NS@PCE possessed higher stability in saturated calcium hydroxide solution compared to pristine nanoSiO2. The influences of NS and NS@PCE on the heat evolution of cement paste were investigated.
Abstract NanoSiO2 has been widely used to improve properties of cement-based composites, but effective dispersion of nanoparticles in cementitious materials remains to be a challenge for their practical applications. This paper introduces a surface modification technique that can enhance dispersion of nanoparticles in aqueous system, especially in the pore solution of cement paste. First, a series of nanoSiO2-polycarboxylate superplasticizer core-shell nanoparticles (nanoSiO2@PCE) were synthesized from silanized polycarboxylate superplasticizer and colloidal nanoSiO2 by the “grafting to” method, the prepared nanoSiO2@PCE were characterized by DLS, FTIR, and TGA. Then the investigation on the interaction between nanoSiO2@PCE and cement shows that nanoSiO2@PCE exhibits higher stability in saturated calcium hydroxide solution than pristine nanoSiO2, and the heat development during cement hydration can be regulated by shell structure of nanoSiO2@PCE. The research provides a new route for nanoSiO2 to optimizing cement-based composites.
Synthesis of nanoSiO2@PCE core-shell nanoparticles and its effect on cement hydration at early age
Highlights A series of NS@PCE with different core-shell ratios were synthesized. NS@PCE possessed higher stability in saturated calcium hydroxide solution compared to pristine nanoSiO2. The influences of NS and NS@PCE on the heat evolution of cement paste were investigated.
Abstract NanoSiO2 has been widely used to improve properties of cement-based composites, but effective dispersion of nanoparticles in cementitious materials remains to be a challenge for their practical applications. This paper introduces a surface modification technique that can enhance dispersion of nanoparticles in aqueous system, especially in the pore solution of cement paste. First, a series of nanoSiO2-polycarboxylate superplasticizer core-shell nanoparticles (nanoSiO2@PCE) were synthesized from silanized polycarboxylate superplasticizer and colloidal nanoSiO2 by the “grafting to” method, the prepared nanoSiO2@PCE were characterized by DLS, FTIR, and TGA. Then the investigation on the interaction between nanoSiO2@PCE and cement shows that nanoSiO2@PCE exhibits higher stability in saturated calcium hydroxide solution than pristine nanoSiO2, and the heat development during cement hydration can be regulated by shell structure of nanoSiO2@PCE. The research provides a new route for nanoSiO2 to optimizing cement-based composites.
Synthesis of nanoSiO2@PCE core-shell nanoparticles and its effect on cement hydration at early age
Gu, Yue (author) / Ran, Qianping (author) / Shu, Xin (author) / Yu, Cheng (author) / Chang, Honglei (author) / Liu, Jiaping (author)
Construction and Building Materials ; 114 ; 673-680
2016-03-18
8 pages
Article (Journal)
Electronic Resource
English
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Synthesis of nanoSiO2@PCE core-shell nanoparticles and its effect on cement hydration at early age
| British Library Online Contents | 2016
Synthesis of nanoSiO2@PCE core-shell nanoparticles and its effect on cement hydration at early age
| British Library Online Contents | 2016