Journal
LANGMUIR
Volume 30, Issue 1, Pages 63-74Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la4039396
Keywords
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Funding
- NSF-CBET [0932901, 1336311]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1336311] Funding Source: National Science Foundation
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [0932901] Funding Source: National Science Foundation
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We report that a variety of ternary particle/liquid/ liquid mixtures heavily aggregate or separate completely if (1) the particles are fully or almost fully wetted by one fluid, and (2) if the wetting fluid volume fraction is comparable to the particle volume fraction. Aggregation and separation do not happen if the particles are partially wetted by both fluids, in which case Pickering emulsions appear at all compositions. Rheological and geometric criteria for aggregation are proposed and compared with a state diagram of a ternary system composed of oil, water, and hydrophilic glass particles. Analogies are drawn to wet granulation and spherical agglomeration, two particle processing operations in which wetting phenomena are important.
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