Paulo Gonçalo, Bartolomé Luis, Bondarchuk Oleksandr, Meloni Simone, Grosu Yaroslav, Giacomello Alberto
Dipartimento di Ingegneria Meccanica e Aerospaziale, Sapienza Università di Roma, 00184 Rome, Italy.
Centre for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), 01510 Álava, Spain.
J Phys Chem C Nanomater Interfaces. 2024 Jul 11;128(29):12036-12045. doi: 10.1021/acs.jpcc.4c02900. eCollection 2024 Jul 25.
Forced wetting (intrusion) and spontaneous dewetting (extrusion) of hydrophobic/lyophobic nanoporous materials by water/nonwetting liquid are of great importance for a broad span of technological and natural systems such as shock-absorbers, molecular springs, separation, chromatography, ion channels, nanofluidics, and many more. In most of these cases, the process of intrusion-extrusion is not complete due to the stochastic nature of external stimuli under realistic operational conditions. However, understanding of these partial processes is limited, as most of the works are focused on an idealized complete intrusion-extrusion cycle. In this work, we show an experimental system operating under partial intrusion/extrusion conditions and present a simple model that captures its main features. We rationalize these operational conditions in terms of the pore entrance and cavity size distributions of the material, which control the range of intrusion/extrusion pressures.
水/非润湿性液体对疏水性/疏液性纳米多孔材料的强制润湿（侵入）和自发去湿（挤出）对于广泛的技术和自然系统非常重要，例如减震器、分子弹簧、分离、色谱、离子通道、纳米流体等等。在大多数这些情况下，由于实际操作条件下外部刺激的随机性，侵入-挤出过程并不完整。然而，对这些部分过程的理解有限，因为大多数工作都集中在理想化的完整侵入-挤出循环上。在这项工作中，我们展示了一个在部分侵入/挤出条件下运行的实验系统，并提出了一个捕捉其主要特征的简单模型。我们根据材料的孔入口和腔尺寸分布来合理化这些操作条件，这些分布控制着侵入/挤出压力的范围。
