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首页> 外文期刊>Comptes Rendus Chimie >Kaolin-poly(methacrylic) acid interaction: Polymer conformation and rheological behavior
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Kaolin-poly(methacrylic) acid interaction: Polymer conformation and rheological behavior

机译：高岭土与聚（甲基丙烯酸）的相互作用：聚合物构象和流变行为

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摘要

The interaction between an ammonium salt of polymethacrylic acid (PMA) and kaolin and its effect on the suspension rheology behavior have been investigated. Adsorption measurements showed significant affinity between PMA and kaolin particles. This adsorption takes place only on the edges of the surface of the particles. The shape of the adsorption isotherm suggests the formation of a monolayer according to the Langmuir model. The amount of PMA adsorbed on kaolin at the equilibrium depends on the pH and the ionic strength of suspensions. According to the adsorption results and the shape of kaolinite particle, the dispersant takes probably a plate conformation on the edges of the surface of the kaolin particle at natural pH (7.7-8) and low ionic strength but a loop conformation at acidic pH (5.5-6) and low ionic strength, and also at natural pH and high ionic strength (0.1 M). Good agreements were observed between adsorption results and Theological properties. The PMA has an efficacious dispersing power for kaolin suspension at natural pH (7.7-8) and low ionic strength.
机译：研究了聚甲基丙烯酸铵盐（PMA）与高岭土之间的相互作用及其对悬浮液流变行为的影响。吸附测量显示，PMA和高岭土颗粒之间具有显着的亲和力。这种吸附仅发生在颗粒表面的边缘上。吸附等温线的形状表明，根据Langmuir模型，单层形成。平衡状态下吸附在高岭土上的PMA的量取决于pH值和悬浮液的离子强度。根据吸附结果和高岭石颗粒的形状，在自然pH（7.7-8）和低离子强度下，分散剂可能在高岭土颗粒的表面边缘呈板状构型，而在酸性pH（5.5）下呈环状构型-6）和低离子强度，以及在自然pH和高离子强度（0.1 M）下。在吸附结果和流变学性质之间观察到良好的一致性。 PMA在自然pH（7.7-8）和低离子强度下对高岭土悬浮液具有有效的分散能力。

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