Investigation of the Effect of Particle Surface Charge and Dispersion Stability on Latex Behavior in Cement Using Non-Ionic and Traditional Latexes
In this work, a novel total non-ionic polystyrene-polyurethane (PS-PU) composite latex was synthesized with polymerizable polyethylene glycol ether. Contrary to traditional styrene-butyl acrylate latex (St-BA), PS-PU has a smaller size and superior dispersion stability, and it is stable in saturated...
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| Format: | Article |
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MDPI AG
2022-09-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/17/6145 |
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| author | Dongliang Zhou Han Yan Yong Yang Xin Shu Lei Chen Changcheng Li Qianping Ran |
| author_facet | Dongliang Zhou Han Yan Yong Yang Xin Shu Lei Chen Changcheng Li Qianping Ran |
| author_sort | Dongliang Zhou |
| collection | DOAJ |
| description | In this work, a novel total non-ionic polystyrene-polyurethane (PS-PU) composite latex was synthesized with polymerizable polyethylene glycol ether. Contrary to traditional styrene-butyl acrylate latex (St-BA), PS-PU has a smaller size and superior dispersion stability, and it is stable in saturated Ca(OH)<sub>2</sub> even after 72 h. In fresh-mixed mortars, PS-PU showed a little adverse effect on workability and insignificant air entrainment, with little defoamer consumption. The retardation effect of PS-PU is also much milder than traditional St-BA. As for strength, PS-PU showed a less adverse effect on early and late age compressive strength, but its effect on flexural strength is not as pronounced as St-BA at high dosages (4% and 6%). The different behavior in cementitious materials between PS-PU and St-BA can be reasoned from their different adsorption behavior and surface charge properties, as the results from characterizations suggest. The non-ionic nature of PS-PU made it less prone to destabilization and adsorption, which turned out as the aforementioned behavior in cementitious systems. The difference can further be ascribed to the difference in their polymeric structure and properties. |
| first_indexed | 2024-03-10T01:35:00Z |
| format | Article |
| id | doaj.art-e62f6cbf8375417caea85786de1a8d0e |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T01:35:00Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-e62f6cbf8375417caea85786de1a8d0e2023-11-23T13:36:21ZengMDPI AGMaterials1996-19442022-09-011517614510.3390/ma15176145Investigation of the Effect of Particle Surface Charge and Dispersion Stability on Latex Behavior in Cement Using Non-Ionic and Traditional LatexesDongliang Zhou0Han Yan1Yong Yang2Xin Shu3Lei Chen4Changcheng Li5Qianping Ran6School of Material Science and Engineering, Southeast University, Nanjing 211189, ChinaState Key Laboratory of High Performance Civil Engineering Materials, Nanjing 211103, ChinaState Key Laboratory of High Performance Civil Engineering Materials, Nanjing 211103, ChinaState Key Laboratory of High Performance Civil Engineering Materials, Nanjing 211103, ChinaState Key Laboratory of High Performance Civil Engineering Materials, Nanjing 211103, ChinaState Key Laboratory of High Performance Civil Engineering Materials, Nanjing 211103, ChinaSchool of Material Science and Engineering, Southeast University, Nanjing 211189, ChinaIn this work, a novel total non-ionic polystyrene-polyurethane (PS-PU) composite latex was synthesized with polymerizable polyethylene glycol ether. Contrary to traditional styrene-butyl acrylate latex (St-BA), PS-PU has a smaller size and superior dispersion stability, and it is stable in saturated Ca(OH)<sub>2</sub> even after 72 h. In fresh-mixed mortars, PS-PU showed a little adverse effect on workability and insignificant air entrainment, with little defoamer consumption. The retardation effect of PS-PU is also much milder than traditional St-BA. As for strength, PS-PU showed a less adverse effect on early and late age compressive strength, but its effect on flexural strength is not as pronounced as St-BA at high dosages (4% and 6%). The different behavior in cementitious materials between PS-PU and St-BA can be reasoned from their different adsorption behavior and surface charge properties, as the results from characterizations suggest. The non-ionic nature of PS-PU made it less prone to destabilization and adsorption, which turned out as the aforementioned behavior in cementitious systems. The difference can further be ascribed to the difference in their polymeric structure and properties.https://www.mdpi.com/1996-1944/15/17/6145nano latexcementdispersion stabilitystrengthadsorption |
| spellingShingle | Dongliang Zhou Han Yan Yong Yang Xin Shu Lei Chen Changcheng Li Qianping Ran Investigation of the Effect of Particle Surface Charge and Dispersion Stability on Latex Behavior in Cement Using Non-Ionic and Traditional Latexes Materials nano latex cement dispersion stability strength adsorption |
| title | Investigation of the Effect of Particle Surface Charge and Dispersion Stability on Latex Behavior in Cement Using Non-Ionic and Traditional Latexes |
| title_full | Investigation of the Effect of Particle Surface Charge and Dispersion Stability on Latex Behavior in Cement Using Non-Ionic and Traditional Latexes |
| title_fullStr | Investigation of the Effect of Particle Surface Charge and Dispersion Stability on Latex Behavior in Cement Using Non-Ionic and Traditional Latexes |
| title_full_unstemmed | Investigation of the Effect of Particle Surface Charge and Dispersion Stability on Latex Behavior in Cement Using Non-Ionic and Traditional Latexes |
| title_short | Investigation of the Effect of Particle Surface Charge and Dispersion Stability on Latex Behavior in Cement Using Non-Ionic and Traditional Latexes |
| title_sort | investigation of the effect of particle surface charge and dispersion stability on latex behavior in cement using non ionic and traditional latexes |
| topic | nano latex cement dispersion stability strength adsorption |
| url | https://www.mdpi.com/1996-1944/15/17/6145 |
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