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使用非接触式界面流变学探究成分熟化的界面力学。

Using Contactless Interfacial Rheology to Probe Interfacial Mechanics for Compositional Ripening.

作者信息

Tadi Raj, Richards James A, Laidlaw Fraser H J, Green Beth, Curwen Thomas, Schofield Andrew B, Thijssen Job H J, Clegg Paul S

机构信息

SUPA School of Physics and Astronomy, University of Edinburgh, Peter Guthrie Tait Road, Edinburgh EH9 3FD, U.K.

Reading Science Centre, Mondele̅z International, Whiteknights Campus, Pepper Lane, Reading RG6 6LA, U.K.

出版信息

Langmuir. 2025 May 13;41(18):11339-11348. doi: 10.1021/acs.langmuir.4c04622. Epub 2025 Apr 30.

DOI:10.1021/acs.langmuir.4c04622
PMID:40306901
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12080336/
Abstract

In this study, we investigate the impact of modifying colloid-colloid interactions on the rheological properties of a layer of poly(methyl methacrylate) PMMA colloids at a dodecane-water interface. Toluene is introduced into the oil phase in order to modify attractive interactions between colloids. We first make qualitative observations of water-in-oil emulsions undergoing compositional ripening, demonstrating how the addition of toluene modifies the evolution. Without toluene, water droplets finally "explode"; with the addition of toluene, they instead form connected colloidal structures. We secondly employ a novel contactless interfacial setup to probe the rheological properties of a PMMA colloid-laden water-dodecane interface, examining the effects of toluene addition. We find that the interface becomes significantly weaker and more flexible following addition of toluene, contrary to what one might expect for increasing interparticle attractions for high surface coverage interfaces.

摘要

在本研究中，我们探究了改变胶体-胶体相互作用对聚甲基丙烯酸甲酯（PMMA）胶体层在十二烷-水界面处流变学性质的影响。将甲苯引入油相以改变胶体之间的吸引相互作用。我们首先对经历组成熟化的油包水乳液进行定性观察，展示了甲苯的添加如何改变其演变过程。没有甲苯时，水滴最终会“破裂”；添加甲苯后，它们反而形成了相连的胶体结构。其次，我们采用一种新型的非接触式界面装置来探测负载PMMA胶体的水-十二烷界面的流变学性质，研究添加甲苯的影响。我们发现，添加甲苯后，界面变得明显更脆弱且更具柔韧性，这与人们对高表面覆盖率界面增加颗粒间吸引力的预期相反。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/5be272db4ca2/la4c04622_0010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/d61c54908342/la4c04622_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/4583f611d70c/la4c04622_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/eb67cedcd77e/la4c04622_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/ef7069fc6a8f/la4c04622_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/2ed5ef4065ec/la4c04622_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/6a81ef712f4d/la4c04622_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/40b9124f0b38/la4c04622_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/82aa08d212da/la4c04622_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/d40fe10a5804/la4c04622_0009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/5be272db4ca2/la4c04622_0010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/d61c54908342/la4c04622_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/4583f611d70c/la4c04622_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/eb67cedcd77e/la4c04622_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/ef7069fc6a8f/la4c04622_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/2ed5ef4065ec/la4c04622_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/6a81ef712f4d/la4c04622_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/40b9124f0b38/la4c04622_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/82aa08d212da/la4c04622_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/d40fe10a5804/la4c04622_0009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/380a/12080336/5be272db4ca2/la4c04622_0010.jpg

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Ductile-to-brittle transition and yielding in soft amorphous materials: perspectives and open questions.软非晶材料中的韧性到脆性转变及屈服：观点与开放性问题。
Soft Matter. 2024 Sep 11;20(35):6868-6888. doi: 10.1039/d3sm01740k.
3
Long term water trapping in Pickering emulsions undergoing compositional ripening.在经历组成熟化的Pickering乳液中长期截留水分。
Soft Matter. 2023 Dec 13;19(48):9428-9434. doi: 10.1039/d3sm00856h.
4
A broad perspective to particle-laden fluid interfaces systems: from chemically homogeneous particles to active colloids.从化学均匀颗粒到活性胶体：颗粒负载流体界面系统的广阔视角。
Adv Colloid Interface Sci. 2022 Apr;302:102620. doi: 10.1016/j.cis.2022.102620. Epub 2022 Mar 3.
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Surface pressure of liquid interfaces laden with micron-sized particles.负载微米级颗粒的液体界面的表面压力。
Soft Matter. 2020 Oct 21;16(40):9347-9356. doi: 10.1039/d0sm01229g.
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J Colloid Interface Sci. 2019 Feb 15;536:30-41. doi: 10.1016/j.jcis.2018.10.028. Epub 2018 Oct 12.
7
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