Colloids and Surfaces A: Physicochemical and Engineering Aspects ( IF 4.9 ) Pub Date : 2022-08-28 , DOI: 10.1016/j.colsurfa.2022.130050
Lili Feng , Yasuhisa Adachi , Thi Hai Yen Doan
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The temporal behavior of adsorbed polymers is important in the analysis of colloid–polymer systems. The single-particle-tracking method provides a reliable approach to acquiring information on the adsorbed polymer layer on a spherical particle. Imaging, tracking, and analysis of the Brownian motion of a single colloidal particle with/without adsorbed polymers provided the trajectory of the Brownian motion and the layer thickness of adsorbed polymers. The temporal decrease in the thickness of an adsorbed polyelectrolyte layer was monitored within 2 h. A polyelectrolyte with a high charge density formed a thick layer on the particle surface and the layer thickness rapidly decreased. A polyelectrolyte with a low charge density formed a thinner layer, and its thickness decreased slightly. The transient adsorption behavior in a system undergoing flocculation can be used for the analysis of adsorption and flocculation in colloid–polymer systems.
中文翻译:
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单粒子跟踪法观察球形粒子上吸附聚电解质流体动力学层厚度的时间变化
吸附聚合物的时间行为在胶体-聚合物系统的分析中很重要。单粒子跟踪方法提供了一种可靠的方法来获取球形粒子上吸附聚合物层的信息。对有/没有吸附聚合物的单个胶体粒子的布朗运动进行成像、跟踪和分析,提供了布朗运动的轨迹和吸附聚合物的层厚度。在 2 小时内监测到吸附的聚电解质层的厚度随时间的减少。具有高电荷密度的聚电解质在颗粒表面形成厚层并且层厚度迅速减小。电荷密度低的聚电解质形成较薄的层,其厚度略有下降。