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Continuous Synthesis of Nanoscale Emulsions by Vapor Condensation (EVC)

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journal contribution
posted on 2024-06-09, 19:11 authored by Sushant AnandSushant Anand, Vincent Galavan, Mahesh Uttamrao Mulik
Emulsions are widely used in many industrial applications, and the development of efficient techniques for synthesizing them is a subject of ongoing research. Vapor condensation is a promising method for energy-efficient, high-throughput production of monodisperse nanoscale emulsions. However, previous studies using this technique are limited to producing small volumes of water-in-oil dispersions. In this work, a new method for the continuous synthesis of nanoscale emulsions (water-in-oil and oil-in-water) is presented by condensing vapor on free-flowing surfactant solutions. The viability of oil vaporization and condensation is demonstrated under mild heating/cooling using diverse esters, terpenes, aromatic hydrocarbons, and alkanes. By systematically investigating water vapor and oil vapor condensation dynamics on bulk liquid-surfactant solutions, a rich diversity of outcomes, including floating films, nanoscale drops, and hexagonally packed microdrops is uncovered. It is demonstrated that surfactant concentration impacts oil spreading, self-emulsification, and such behavior can aid in the emulsification of condensed oil drops. This work represents a critical step toward advancing the vapor condensation method's applications for emulsions and colloidal systems, with broad implications for various fields and the development of new emulsion-based products and industrial processes.

Funding

CAREER - Condensation-Driven Phase-Transitioning Surfaces | Funder: National Science Foundation | Grant ID: CBET-1847627

History

Citation

Anand, S., Galavan, V.Mulik, M. U. (2024). Continuous Synthesis of Nanoscale Emulsions by Vapor Condensation (EVC). Advanced Science, 11(15), 2307443-. https://doi.org/10.1002/advs.202307443

Publisher

Wiley

Language

  • en

issn

2198-3844

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