Miniemulsions: droplet size and stability versus final particle size

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-03-17 DOI:10.1007/s43153-024-00445-z

Letícia Alves Costa da Laqua, José Luiz Francisco Alves, Guilherme Davi Mumbach, Karina Luzia Andrade, Ricardo Antonio Francisco Machado, Claudia Sayer, E. David Sudol, Mohamed S. El-Aasser

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Abstract

In this work, the effect of the sonification time on the stability of styrene and styrene/butyl acrylate (50/50) miniemulsions was investigated by centrifugation. Octadecyl methacrylate (ODMA) miniemulsion was used as a comparative system owing to its degradation by monomer diffusion being minimum. The droplet and particle size distributions were also evaluated by capillary hydrodynamic fractionation (CHDF) and dynamic light scattering (DLS) for the various sonification times. For the styrene/butyl acrylate miniemulsions, the most stable were those formed with the shortest sonification times tested, 1 and 2 min. For the styrene miniemulsions, longer sonification times were required than for the styrene/butyl acrylate miniemulsions and the most stable sample was formed by the use of 4 min of sonification. It was observed that larger droplets (300 to 1000 nm) were formed at shorter sonification times, although the numbers of these were reduced significantly after polymerization owing to monomer diffusion from these larger “reservoir” droplets to the smaller droplets and particles.

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微型乳液：液滴大小和稳定性与最终颗粒大小的关系

在这项工作中，通过离心分离法研究了超声时间对苯乙烯和苯乙烯/丙烯酸丁酯（50/50）微乳液稳定性的影响。由于甲基丙烯酸十八酯（ODMA）的单体扩散降解最小，因此将其作为对比体系。此外，还通过毛细管流体力学分馏（CHDF）和动态光散射（DLS）对不同超声时间下的液滴和粒度分布进行了评估。就苯乙烯/丙烯酸丁酯微乳液而言，最稳定的微乳液是在测试的最短超声时间（1 分钟和 2 分钟）下形成的。与苯乙烯/丙烯酸丁酯迷你乳液相比，苯乙烯迷你乳液所需的超声时间更长，使用 4 分钟的超声时间形成的样品最稳定。据观察，在较短的超声时间内可形成较大的液滴（300 至 1000 nm），但由于单体从这些较大的 "储库 "液滴扩散到较小的液滴和颗粒，这些液滴的数量在聚合后显著减少。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.