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Gas Marbles : Much Stronger than Liquid Marbles

Abstract : Enwrapping liquid droplets with hydrophobic particles allows the manufacture of so-called " liquid marbles " [Aussillous and Quéré Nature (London) 411, 924 (2001); Mahadevan 411, 895 (2001)]. The recent intensive research devoted to liquid marbles is justified by their very unusual physical and chemical properties and by their potential for various applications, from microreactors to water storage, including water pollution sensors [Bormashenko Curr. Opin. Colloid Interface Sci. 16, 266 (2011)]. Here we demonstrate that this concept can be successfully applied for encapsulating and protecting small gas pockets within an air environment. Similarly to their liquid counterparts, those new soft-matter objects, that we call " gas marbles, " can sustain external forces. We show that gas marbles are surprisingly tenfold stronger than liquid marbles and, more importantly, they can sustain both positive and negative pressure differences. This magnified strength is shown to originate from the strong cohesive nature of the shell. Those interesting properties could be exploited for imprisoning valuable or polluted gases or for designing new aerated materials.
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Yousra Timounay, Olivier Pitois, Florence Rouyer. Gas Marbles : Much Stronger than Liquid Marbles. Physical Review Letters, American Physical Society, 2017, 118 (22), 5 p. ⟨10.1103/PhysRevLett.118.228001⟩. ⟨hal-01634940⟩

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