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Stable Liquid Jets Bouncing off Soft Gels
Physical Review Letters ( IF 8.6 ) Pub Date : 2018-01-12 00:00:00 , DOI: 10.1103/physrevlett.120.028006
Dan Daniel , Xi Yao , Joanna Aizenberg

A liquid jet can stably bounce off a sufficiently soft gel by following the contour of the dimple created upon impact. This new phenomenon is insensitive to the wetting properties of the gels and was observed for different liquids over a wide range of surface tensions, γ=2472  mN/m. In contrast, other jet rebound phenomena are typically sensitive to γ: only a high γ jet rebounds off a hard solid (e.g. superhydrophobic surface) and only a low γ jet bounces off a liquid bath. This is because an air layer must be stabilized between the two interfaces. For a soft gel, no air layer is necessary and the jet rebound remains stable even when there is direct liquid-gel contact.

中文翻译:

稳定的液体喷射弹起软凝胶

液体射流可以遵循撞击时产生的凹痕轮廓,稳定地反弹出足够柔软的凝胶。这种新现象对凝胶的润湿特性不敏感,并且在各种表面张力范围内的不同液体中都可以观察到这种现象,γ=24-72  牛顿/。相反,其他喷射回弹现象通常对γ:只有高 γ 射流从坚硬的固体(例如超疏水表面)上反弹,只有一点点反弹 γ喷射从液体浴中弹起。这是因为必须在两个界面之间稳定空气层。对于软凝胶,即使有直接的液体-凝胶接触,也不需要空气层,并且射流回弹仍保持稳定。
更新日期:2018-01-12
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