Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/73866
Type: Artigo
Title: The elasticity of soap bubbles containing wormlike micelles
Author: Sabadini, Edvaldo
Ungarato, Rafael F. S.
Miranda, Paulo B.
Abstract: Slow-motion imaging of the rupture of soap bubbles generally shows the edges of liquid films retracting at a constant speed (known as the Taylor-Culick velocity). Here we investigate soap bubbles formed from simple solutions of a cationic surfactant (cetyltrimethylammonium bromide - CTAB) and sodium salicylate. The interaction of salicylate ions with CTAB leads to the formation of wormlike micelles (WLM), which yield a viscoelastic behavior to the liquid film of the bubble. We demonstrate that these elastic bubbles collapse at a velocity up to 30 times higher than the Taylor-Culick limit, which has never been surpassed. This is because during the bubble inflation, the entangled WLM chains stretch, storing elastic energy. This extra energy is then released during the rupture of the bubble, yielding an additional driving force for film retraction (besides surface tension). This new mechanism for the bursting of elastic bubbles may have important implications to the breakup of viscoelastic sprays in industrial applications.
Slow-motion imaging of the rupture of soap bubbles generally shows the edges of liquid films retracting at a constant speed (known as the Taylor–Culick velocity). Here we investigate soap bubbles formed from simple solutions of a cationic surfactant (cety
Subject: Micelas gigantes
Bolhas
Surfactantes
Country: Estados Unidos
Editor: American Chemical Society
Citation: Langmuir. Amer Chemical Soc, v. 30, n. 3, n. 727, n. 732, 2014.
Rights: fechado
Identifier DOI: 10.1021/la404513h
Address: https://pubs.acs.org/doi/full/10.1021/la404513h
Date Issue: 2014
Appears in Collections:IQ - Artigos e Outros Documentos

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