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Observation of temporal change of the hydrodynamic layer thickness of adsorbed polyelectrolytes on spherical particles by single-particle-tracking method
Colloids and Surfaces A: Physicochemical and Engineering Aspects Số , năm 2022 (Tập 654, trang -)
ISSN: 9277757
ISSN: 9277757
DOI:
Tài liệu thuộc danh mục:
Article
English
Từ khóa: Adsorption; Flocculation; Hydrodynamics; Ostwald ripening; Polyelectrolytes; nanoparticle; nanosphere; polyelectrolyte; polymer; thinner; Adsorbed polymers; Hydrodynamic layer thickness; Layer thickness; Particle tracking; Particle-tracking method; Polyelectrolyte adsorption; Polymer systems; Single particle tracking; Spherical particle; Temporal change; adsorption; Article; colloid; flocculation; hydrodynamics; imaging; surface property; temporal analysis; thickness; Brownian movement
Tóm tắt tiếng anh
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. © 2022 Elsevier B.V.
