Fabrics with Tunable Oleophobicity

Abstract

Acknowledgement.

Hygro-responsive membranes for effective oil–water separation

“…Recent work 15,18,19,[27][28][29][30] has explained how 're-entrant surface texture' , in conjunction with surface chemistry and roughness, can be used to design superoleophobic surfaces. We have previously discussed the spacing ratio, D*, which is a dimensionless measure of surface porosity 19 .…”

“…As a result, any membrane with A*≤1 for a given liquid cannot prevent liquid permeation, whereas values of A*1 imply a high resistance to liquid permeation. For surfaces possessing a cylindrical texture, the robustness factor is given by 19,28 A P…”

Recent developments in polymeric superoleophobic surfaces

“…It introduces the requirement for overhang structures, mushroom-like structures, inverse-trapezoidal microstructures, negative slopes, and fibers. 29,[43][44][45][46][47][48][49][50][51][52][53][54] The concept of re-entrant surface curvature was put forward by Tuteja et al 29 In their studies, they synthesized a class of polyhedral oligomeric silsesquioxane (POSS) molecules [the insert of Fig. 2(C)] and fabricated fiber mats with them [ Fig.…”

A superoleophobic textile repellent towards impacting drops of alkanes

“…At least as important is the robustness of the heterogenous non-wetting state with respect to penetration of the liquid into the substrate [10,17]. Fading into the homogenous wetted state would imply complete loss of the repellent properties [30].…”

“…Third, the surface energy of the substrate should be as low as possible [7,8,11]. Due to these quite intricate prerequisites up to now only a few surfaces have been reported on which low surface tension liquids such as hexadecane (γ = 27 mNm -1 ) [12][13][14][15][16], dodecane (γ = 24.9 mNm -1 ) [16,17], decane (γ = 23.4 mNm -1 ) [16], ethanol (γ = 22 mNm -1 ) [9], silicone oil (γ = 22 mNm -1 ) [14] or octane (γ = 21.1 mNm -1 ) [8] show superoleophobicity, meaning apparent contact angles above 150° and low sliding angles.…”