CLC number: TU523
On-line Access: 2021-02-05
Received: 2020-02-15
Revision Accepted: 2020-05-28
Crosschecked: 2020-12-24
Cited: 0
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Dong-ming Yan, Sheng-qian Ruan, Shi-kun Chen, Yi Liu, Ye Tian, Hai-long Wang, Tian-nan Ye. Effects and mechanisms of surfactants on physical properties and microstructures of metakaolin-based geopolymer[J]. Journal of Zhejiang University Science A, 2021, 22(2): 130-146.
@article{title="Effects and mechanisms of surfactants on physical properties and microstructures of metakaolin-based geopolymer",
author="Dong-ming Yan, Sheng-qian Ruan, Shi-kun Chen, Yi Liu, Ye Tian, Hai-long Wang, Tian-nan Ye",
journal="Journal of Zhejiang University Science A",
volume="22",
number="2",
pages="130-146",
year="2021",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2000059"
}
%0 Journal Article
%T Effects and mechanisms of surfactants on physical properties and microstructures of metakaolin-based geopolymer
%A Dong-ming Yan
%A Sheng-qian Ruan
%A Shi-kun Chen
%A Yi Liu
%A Ye Tian
%A Hai-long Wang
%A Tian-nan Ye
%J Journal of Zhejiang University SCIENCE A
%V 22
%N 2
%P 130-146
%@ 1673-565X
%D 2021
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2000059
TY - JOUR
T1 - Effects and mechanisms of surfactants on physical properties and microstructures of metakaolin-based geopolymer
A1 - Dong-ming Yan
A1 - Sheng-qian Ruan
A1 - Shi-kun Chen
A1 - Yi Liu
A1 - Ye Tian
A1 - Hai-long Wang
A1 - Tian-nan Ye
J0 - Journal of Zhejiang University Science A
VL - 22
IS - 2
SP - 130
EP - 146
%@ 1673-565X
Y1 - 2021
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2000059
Abstract: In this study, the effects of five different ionic and nonionic surfactants on the physical properties and microstructures of a metakaolin-based geopolymer (MKG) were investigated. It is the first comprehensive comparative study of the effects of sodium lauryl sulfonate (SLS), alkyl polyglycoside (APG), benzalkonium chloride (BAC), sucrose fatty acid esters (SE), and stearic acid (STA) on MKG. Viscosity, densities, apparent water absorption, and compressive strength were measured, and pore structures, micro-defects, and gels observed through scanning electron microscopy (SEM) and mercury intrusion porosimetry (MIP). In the MKG slurry, a high affinity of surfactants to liquid-air interfaces increased viscosity and promoted the generation of bubbles. Based on both the ionic types and molecular configurations of the surfactants, stronger adsorption of a surfactant on the surface of the metakaolin resulted in better dispersion of metakaolin particles and a denser microstructure of the MKG. The surfactants with weaker adsorption (SLS and APG) caused higher porosity, a larger pore size, and more micro-defects, while those with stronger adsorption (BAC, SE, and STA) led to relatively lower porosity and denser microstructures. Density, water absorption, and compressive strength were closely related to the total intrusion porosity of the MKG. The mechanisms underlying surfactant adsorption to the surface of metakaolin are proposed.
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