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- Publisher Website: 10.1016/j.colsurfa.2023.132428
- Scopus: eid_2-s2.0-85171629261
- WOS: WOS:001081847900001
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Article: Osmosis-induced hydrodynamic centering of W/O/W double emulsion droplets for quasi-concentric microcapsule/microsphere fabrication
Title | Osmosis-induced hydrodynamic centering of W/O/W double emulsion droplets for quasi-concentric microcapsule/microsphere fabrication |
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Authors | |
Keywords | Hydrodynamic regulation Microfluidics Microspheres Osmosis W/O/W double emulsion droplet |
Issue Date | 20-Nov-2023 |
Publisher | Elsevier |
Citation | Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2023, v. 677 How to Cite? |
Abstract | Water-in-oil-in-water (W/O/W) double emulsion droplets are a typical colloidal system applied in various practical fields. However, certain high-specification applications necessitate exact geometric homogeneity in terms of both shell diameter and thickness. Despite achieving uniformity in shell diameter, on-chip microfluidic emulsification always leads to an eccentric phenomenon due to innate density differences of the droplet solution. At the same time, the current regulation methods have multiple limitations, including their applicability, regulatory scope, and objective restrictions. Herein, we propose an off-chip osmosis-induced hydrodynamic method to accurately regulate the eccentricity of W/O/W double emulsion droplets. The rational selection of hypertonic osmosis can energize the droplets and induce inward transmembrane water flux. This flow helps to reposition the droplet core to align concentrically with the shell, regardless of the initial dimension and eccentricity of the droplets. As the osmotic induction reduces due to the dilution of the inner solute molar concentration, the optimal droplet configuration can be achieved when osmosis-induced hydrodynamic regulation sufficiently counteracts the adverse effects of droplet solution density difference. The microcapsules can thus be produced by instant UV polymerization of the regulated double emulsion droplets, and the silica microspheres with fine geometric homogeneity can be prepared through further heat treatment, which is expected to meet the stringent morphological requirements in practical applications. |
Persistent Identifier | http://hdl.handle.net/10722/339647 |
ISSN | 2023 Impact Factor: 4.9 2023 SCImago Journal Rankings: 0.860 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Wu, H | - |
dc.contributor.author | Jiang, T | - |
dc.contributor.author | Wu, W | - |
dc.contributor.author | Zhang, S | - |
dc.contributor.author | Li, M | - |
dc.contributor.author | Zhou, J | - |
dc.contributor.author | Zhu, M | - |
dc.contributor.author | Chen, J | - |
dc.contributor.author | Li, Z | - |
dc.contributor.author | Lu, Y | - |
dc.contributor.author | Jiang, H | - |
dc.date.accessioned | 2024-03-11T10:38:14Z | - |
dc.date.available | 2024-03-11T10:38:14Z | - |
dc.date.issued | 2023-11-20 | - |
dc.identifier.citation | Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2023, v. 677 | - |
dc.identifier.issn | 0927-7757 | - |
dc.identifier.uri | http://hdl.handle.net/10722/339647 | - |
dc.description.abstract | <p>Water-in-oil-in-water (W/O/W) double emulsion droplets are a typical colloidal system applied in various practical fields. However, certain high-specification applications necessitate exact geometric homogeneity in terms of both shell diameter and thickness. Despite achieving uniformity in shell diameter, on-chip microfluidic emulsification always leads to an eccentric phenomenon due to innate density differences of the droplet solution. At the same time, the current regulation methods have multiple limitations, including their applicability, regulatory scope, and objective restrictions. Herein, we propose an off-chip osmosis-induced hydrodynamic method to accurately regulate the eccentricity of W/O/W double emulsion droplets. The rational selection of hypertonic osmosis can energize the droplets and induce inward transmembrane water flux. This flow helps to reposition the droplet core to align concentrically with the shell, regardless of the initial dimension and eccentricity of the droplets. As the osmotic induction reduces due to the dilution of the inner solute molar concentration, the optimal droplet configuration can be achieved when osmosis-induced hydrodynamic regulation sufficiently counteracts the adverse effects of droplet solution density difference. The microcapsules can thus be produced by instant UV polymerization of the regulated double emulsion droplets, and the silica microspheres with fine geometric homogeneity can be prepared through further heat treatment, which is expected to meet the stringent morphological requirements in practical applications.</p> | - |
dc.language | eng | - |
dc.publisher | Elsevier | - |
dc.relation.ispartof | Colloids and Surfaces A: Physicochemical and Engineering Aspects | - |
dc.subject | Hydrodynamic regulation | - |
dc.subject | Microfluidics | - |
dc.subject | Microspheres | - |
dc.subject | Osmosis | - |
dc.subject | W/O/W double emulsion droplet | - |
dc.title | Osmosis-induced hydrodynamic centering of W/O/W double emulsion droplets for quasi-concentric microcapsule/microsphere fabrication | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.colsurfa.2023.132428 | - |
dc.identifier.scopus | eid_2-s2.0-85171629261 | - |
dc.identifier.volume | 677 | - |
dc.identifier.eissn | 1873-4359 | - |
dc.identifier.isi | WOS:001081847900001 | - |
dc.identifier.issnl | 0927-7757 | - |