Wetting a superomniphobic porous system. Issue 42 (18th October 2019)

• Record Type: Journal Article
• Authors: Cimadoro, J.; Ribba, L.; Goyanes, S.; Cerda, E.
• Is Part Of: Soft matter. Volume 15:Issue 42(2019)
• Page Start: 8621
• Page End: 8626
• Publication Date: 2019-10-18
• Subjects: Soft condensed matter -- Periodicals; 530.413
• DOI: 10.1039/c9sm01091b
• Languages: English
• ISSNs: 1744-683X

Abstract

Abstract : We study experimentally and theoretically the critical pressure needed to move a liquid through a network of pores and show that, for small aperture size, wetting and leaking are typical first-order transitions, with a singular behavior at the omniphobic/omniphilic limit. Abstract : While important research has been focused on developing surfaces that do not wet, some textures with high-wetting resistance are familiar in other applications in which the opposite is needed. A multivalued surface, common in most fabrics or meshes, allows the invading gas–liquid interface to support relatively high imposed pressures and plays a key role in producing topographic elements that avoid wetting. Here we study experimentally and theoretically the critical pressure needed to move a liquid through a network of pores and show that, for small aperture size, wetting and leaking are typical first-order transitions, with a singular behavior at the omniphobic/omniphilic limit ( θ c = π/2).