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Effect of Ageing on the Structure and Properties of Model Liquid-Infused Surfaces
Langmuir ( IF 3.7 ) Pub Date : 2020-03-24 , DOI: 10.1021/acs.langmuir.0c00059 Sarah J Goodband 1 , Steven Armstrong 2 , Halim Kusumaatmaja 1 , Kislon Voı Tchovsky 1
Langmuir ( IF 3.7 ) Pub Date : 2020-03-24 , DOI: 10.1021/acs.langmuir.0c00059 Sarah J Goodband 1 , Steven Armstrong 2 , Halim Kusumaatmaja 1 , Kislon Voı Tchovsky 1
Affiliation
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Liquid-infused surfaces (LISs) exhibit unique properties that make them ideal candidates for a wide range of applications, from antifouling and anti-icing coatings to self-healing surfaces and controlled wetting. However, when exposed to realistic environmental conditions, LISs 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 a model LIS composed of glass surfaces functionalized with hydrophobic nanoparticles and infused with silicone oil. The LISs 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’s wetting properties. We also track the changes to the LIS’s nanoscale structure. We find that the LISs rapidly lose their slippery properties because of 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 LISs.
中文翻译：
老化对模型注液表面结构和性能的影响
液体注入表面 (LIS) 具有独特的性能，使其成为从防污和防冰涂层到自修复表面和受控润湿等广泛应用的理想选择。然而，当暴露于现实环境条件时，LIS 往往会老化并逐渐失去其所需的特性，可能会影响其应用。相关的老化机制仍然知之甚少，反映现实生活应用的结果也很少。在这里，我们跟踪了 LIS 模型的老化情况，该模型由用疏水纳米颗粒功能化并注入硅油的玻璃表面组成。LIS 完全浸没在水溶液中，并在设定的时间间隔内暴露于声压波。通过定期测量 LIS 的润湿特性来监测老化情况。我们还跟踪了 LIS 纳米级结构的变化。我们发现，由于油损失、纳米多孔功能层的平滑以及直接暴露于溶液时基材降解的综合作用，LIS 迅速失去其光滑特性。油损失与水微滴进入油层并将油从表面移开是一致的。这些机制是通用的，可能在大多数 LIS 的老化过程中发挥作用。
更新日期：2020-03-26
中文翻译：
老化对模型注液表面结构和性能的影响
液体注入表面 (LIS) 具有独特的性能，使其成为从防污和防冰涂层到自修复表面和受控润湿等广泛应用的理想选择。然而，当暴露于现实环境条件时，LIS 往往会老化并逐渐失去其所需的特性，可能会影响其应用。相关的老化机制仍然知之甚少，反映现实生活应用的结果也很少。在这里，我们跟踪了 LIS 模型的老化情况，该模型由用疏水纳米颗粒功能化并注入硅油的玻璃表面组成。LIS 完全浸没在水溶液中，并在设定的时间间隔内暴露于声压波。通过定期测量 LIS 的润湿特性来监测老化情况。我们还跟踪了 LIS 纳米级结构的变化。我们发现，由于油损失、纳米多孔功能层的平滑以及直接暴露于溶液时基材降解的综合作用，LIS 迅速失去其光滑特性。油损失与水微滴进入油层并将油从表面移开是一致的。这些机制是通用的，可能在大多数 LIS 的老化过程中发挥作用。
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