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Issue 28, 2012
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Stick-slip control of the Carbopol microgels on polymethyl methacrylate transparent smooth walls

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Abstract

Microgel suspensions such as Carbopol are commonly used as viscoplastic fluid models in fluid mechanics experiments. Polymethyl methacrylate (PMMA) walls are also frequently used in these experiments since they enable flow visualizations via their transparency properties. When sheared with smooth surfaces, the microgels slip on the surfaces and an apparent motion of the fluid occurs below the bulk yield stress τy. This motion stops at a sliding yield stress τs. The occurrence of this apparent slip below τy can significantly modify the flow features. This article presents a PMMA treatment to inhibit the slip of the Carbopol microgels. The method is simple to perform, independent of the treatment conditions and stable over time.

Graphical abstract: Stick-slip control of the Carbopol microgels on polymethyl methacrylate transparent smooth walls

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Publication details

The article was received on 26 Jan 2012, accepted on 11 Jun 2012 and first published on 19 Jun 2012


Article type: Communication
DOI: 10.1039/C2SM26244D
Citation: Soft Matter, 2012,8, 7365-7367
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    Stick-slip control of the Carbopol microgels on polymethyl methacrylate transparent smooth walls

    M. Christel, R. Yahya, M. Albert and B. A. Antoine, Soft Matter, 2012, 8, 7365
    DOI: 10.1039/C2SM26244D

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