Comparative study on compressive strength of coated particles prepared in a Wurster fluidized bed using different coating materials

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-03-14 DOI:10.1016/j.powtec.2025.120928

Jinnan Guo, Daoyin Liu, Zhiheng Fan, Jiliang Ma, Cai Liang, Xiaoping Chen

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引用次数: 0

Abstract

Wurster fluidized beds are widely used for coating particles, whose mechanical stability and functional reliability strongly depend on the particle compressive strength. In this study, the compressive strength of coated particles using different coating materials (suspension, colloidal dispersion, and solution) under various drying conditions (fluidizing gas temperature and liquid spray rate) and atomization pressures is evaluated. Generally, the compressive strength decreases in following order: particles coated with suspension, colloidal dispersion, and solution. For suspension, the compressive strength shows minimal sensitivity to drying rate or atomization pressure. For colloidal dispersion, the variation of compressive strength with the drying rates and atomization pressures is not monotonic. For solution, lower drying rates or atomization pressures result in slightly loose coating shells, leading to decreased compressive strength. Finally, influencing mechanisms on compressive strength are summarized, which can be helpful to improve coated particle quality in Wurster fluidized beds.

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.