arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.06079cond-mat.softcond-mat.mtrl-sciphysics.app-ph
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时效对模拟充液表面结构和性能的影响

The Effect of Ageing on the Structure and Properties of Model Liquid Infused Surfaces

Sarah J. Goodband, Steven Armstrong, Halim Kusumaatmaja, Kislon Voitchovsky

摘要:

液体注入表面(LIS)具有独特的性能,使其成为广泛应用的理想候选者,从防污和防冰涂层到自修复表面和受控润湿。然而,当暴露于现实的环境条件下,LIS往往会老化并逐渐失去其理想的性能,从而可能影响其应用。相关的老化机制仍然知之甚少,反映现实生活中的应用结果很少。在这里,我们跟踪模型LIS组成的玻璃表面功能化与疏水纳米粒子和硅油注入老化。LIS完全浸没在水溶液中,并暴露于声压波设定的时间间隔。通过定期测量LIS的润湿性能来监测老化。我们还跟踪LIS纳米级结构的变化。我们发现,LIS迅速失去其滑性能,由于组合的油损失,平滑的纳米多孔功能层和基板降解时,直接暴露于溶液。油损失与进入油层的水微滴和将油从表面驱离一致。这些机制是普遍的,可能在大多数LIS的老化过程中发挥作用。

英文摘要:

Liquid infused surfaces (LIS) exhibit unique properties that make them ideal candidates for a wide range of applications, from anti-fouling and anti-icing coatings to self-healing surfaces and controlled wetting. However, when exposed to realistic environmental conditions, LIS tend to age and progressively lose their desirable properties, potentially compromising their application. The associated ageing mechanisms are still poorly understood, and results reflecting real-life applications are scarce. Here we track the ageing of model LIS composed of glass surfaces functionalized with hydrophobic nanoparticles and infused with silicone oil. The LIS are fully submerged in aqueous solutions and exposed to acoustic pressure waves for set time intervals. The ageing is monitored by periodic measurements of the LIS' wetting properties. We also track changes to the LIS' nanoscale structure. We find that the LIS rapidly lose their slippery properties due to a combination of oil loss, smoothing of the nanoporous functional layer and substrate degradation when directly exposed to the solution. The oil loss is consistent with water microdroplets entering the oil layer and displacing oil away from the surface. These mechanisms are general and could play a role in the ageing of most LIS.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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