Microgels at interfaces, from mickering emulsions to flat interfaces and back
Microgels at interfaces, from mickering emulsions to flat interfaces and back
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DOI：
10.1016/j.cis.2020.102350
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发表时间：
2021-01-05
影响因子：
15.6
通讯作者：
Maldonado-Valderrama, Julia
中科院分区：
文献类型：
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作者：
Angel Fernandez-Rodriguez, Miguel;Martin-Molina, Alberto;Maldonado-Valderrama, Julia
在这篇评论中，我们涵盖了界面处基于p（NIPAM）的微凝胶的主题，并根据最新的研究重新审视经典研究。特别是，我们专注于它们作为乳化剂在所谓的米克林乳液，即皮克林乳液稳定的软颗粒。考虑到这些软颗粒在界面的实验表征和模拟的复杂性，审查结构在渐进的复杂性水平，直到我们达到非常有趣的和有前途的响应刺激的mickering乳液。我们从最低层次的复杂性，目前的理解单一的微凝胶局限在一个平面界面的行为。然后，我们讨论了他们的集体行为拥挤时，他们在界面上的响应，和他们的宏观性能作为微凝胶膜。一旦我们有必要的表征工具，我们继续讨论响应性米克林乳液的复杂和复杂的图片。这条路是艰难的，目前有争议和矛盾的研究，但它也有希望的结果。我们的状态开放的问题值得解决的软物质社区，我们的结论是，这是值得的麻烦后，继续微凝胶界面活性的主理论，因为它将铺平道路，广泛采用响应米克林乳液作为值得皮克林乳液的继任者。(C)2020爱思唯尔B.V.保留所有权利。
In this review, we cover the topic of p(NIPAM) based microgels at interfaces, revisiting classical studies in light of the newest ones. In particular, we focus on their use as emulsifiers in the so-called mickering emulsions, i.e. Pickering emulsion stabilized by soft particles. Given the complexity of the experimental characterization and simulation of these soft particles at interfaces, the review is structured in progressive complexity levels, until we reach the highly interesting and promising responsiveness to stimuli of mickering emulsions. We start from the lowest level of complexity, the current understanding of the behavior of single microgels confined at a flat interface. Then, we discuss their collective behavior upon crowding, their responsiveness at interfaces, and their macroscopic properties as microgel films. Once we have the necessary characterization tools, we proceed to discuss the complex and convoluted picture of responsive mickering emulsions. The way is rough, with current controversial and contradicting studies, but it holds promising results as well. We state open questions worth of being tackled by the Soft Matter community, and we conclude that it is worth the trouble of continuing after the master theory of microgel interfacial activity, as it will pave the way to widely adopt responsive mickering emulsions as the worthy Pickering emulsion successors. (C) 2020 Elsevier B.V. All rights reserved.