Investigation of the Effect of Particle Surface Charge and Dispersion Stability on Latex Behavior in Cement Using Non-Ionic and Traditional Latexes.
Investigation of the Effect of Particle Surface Charge and Dispersion Stability on Latex Behavior in Cement Using Non-Ionic and Traditional Latexes.
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使用非离子和传统乳胶研究颗粒表面电荷和分散稳定性对水泥中乳胶行为的影响
DOI：
10.3390/ma15176145
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发表时间：
2022-09-05
期刊：
影响因子：
--
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中科院分区：
文献类型：
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以可聚合聚乙二醇醚为原料，合成了一种新型的全非离子型聚苯乙烯-聚氨酯（PS-PU）复合乳液。与传统的苯丙乳液（St-BA）相比，PS-PU具有更小的粒径和更好的上级分散稳定性，在饱和Ca（OH）2溶液中72 h仍保持稳定。在新拌砂浆中，PS-PU对砂浆的和易性和引气量影响较小，消泡剂用量较少。PS-PU的延迟效果也比传统的St-BA温和得多。至于强度，PS-PU表现出较小的不利影响的早期和后期的压缩强度，但它的影响不明显的弯曲强度的St-BA在高剂量（4%和6%）。PS-PU和St-BA在胶凝材料中的不同行为可以从它们不同的吸附行为和表面电荷性质来推断，表征结果表明。PS-PU的非离子性质使其不太容易失稳和吸附，这在水泥体系中表现为上述行为。这种差异可以进一步归因于它们的聚合物结构和性能的差异。
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)2 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.
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影响因子：
3.4
作者：
Raki L;Beaudoin J;Alizadeh R;Makar J;Sato T
通讯作者：
Sato T
DOI：
10.3390/ma9020084
发表时间：
2016-01-29
期刊：
Materials (Basel, Switzerland)
影响因子：
--
作者：
Kim HH;Kim CS;Jeon JH;Park CG
通讯作者：
Park CG
影响因子：
11.4
作者：
Nehdi, M;Sumner, J
通讯作者：
Sumner, J
碳纳米管和苯丙乳液添加剂对水泥净浆微观结构和力学性能的影响
影响因子：
3.4
作者：
Fan, Jie;Li, Gengying;Zhang, Zhijun
通讯作者：
Zhang, Zhijun
影响因子：
10.5
作者：
Ohama, Y
通讯作者：
Ohama, Y