A Superhydrophobic and Oleophobic Silicone Sponge with Hierarchical Structures

Abstract

The fabrication of amphiphobic materials requires a precise and complicated design, especially for 3D porous materials, and amphiphobic sponges have rarely been investigated. This paper describes the synthesis of a superhydrophobic and oleophobic silicone sponge (SS‐F) by simply building hierarchical structures, that is, introducing a secondary structure on the pore walls of a hydrophobic and oleophilic silicone sponge. This simple and efficient synthesis method is based on the thiol–ene click reaction. The uniform structure, composition, and hierarchical structures of SS‐F are confirmed. The results of the analyses show that the secondary microstructure improves liquid repellency, while the rough and porous surface design ensures durability. Thus, SS‐F exhibits good stability, and the amphiphobicity of the surface could withstand scalpel cutting, cyclic compression, extreme temperatures of 250 and −196 °C for 5 h, and long‐term storage in an ambient environment. Both its outer and inner surfaces show superhydrophobicity and oleophobicity, which restrict the ability of the adsorption of liquids, enabling its use in oil and water. The introduction of hierarchical structures paves a way for preparing other 3D porous materials.

Superhydrophobic and superoleophilic polyurethane: Effect of different sponge densities, magnesium stearate loadings, harsh environmental conditions

“…Up to now, superhydrophobic porous absorbent materials attracted remarkable attentions because of their precise properties to fill this gap. A number of the superhydrophobic absorbents have been designed, such as polymer foams, 19,20 organic silicone sponges, 21,22 carbon-based aerogels, 23,24 activated carbon, 25,26 wood, [27][28][29] and clay. 30 Their low selectivity, low absorption, and recyclability could be pointed to the related research areas.…”

The Use of the Thiol-Ene Addition Click Reaction in the Chemistry of Organosilicon Compounds: An Alternative or a Supplement to the Classical Hydrosilylation?

“…The functional POSS that are used most widely include pentacyclo-[9.5.1.1 3,9 .1 5,15 .1 7,13 ]-octasiloxane, 1,3,5,7,9,11,13,15-octaethenyl ( 1 ) [ 53 , 54 , 55 ] and pentacyclo-[9.5.1.13,9.15,15.17,13]-octasiloxane-1,3,5,7,9,11,13,15-octapropanethiol ( 2 ) [ 56 , 57 , 58 , 59 ] (see Figure 15 ).…”

Sulfur‐Containing Silsesquioxane Derivatives Obtained by the Thiol‐ene Reaction: Synthesis and Thermal Degradation

“…[24] Other examples of modified SSQ-8SH include 9-vinyl carbazole-substituted SSQ, [25] dendrimers with diethyl allylmalonate, [26] phosphorylcholine-substituted silsesquioxanes, [27] or hydrophobic and oleophobic silicone sponge with polymethylvinylsiloxane. [28] This paper presents new derivatives of octa(3-thiopropyl)silsesquioxane (SSQ-8SH) obtained as a result of hydrothiolation of selected commercially available olefins with SSQ-8SH. The compounds are obtained via the radical thiol-ene reaction.…”

“…The obtained compound has both mercaptopropyl and fluorocarbon groups and may have potential applications as a nanoadditive to photocurable coatings (strong hydrophobic and oleophobic properties) [24] . Other examples of modified SSQ‐8SH include 9‐vinyl carbazole‐substituted SSQ, [25] dendrimers with diethyl allylmalonate, [26] phosphorylcholine‐substituted silsesquioxanes, [27] or hydrophobic and oleophobic silicone sponge with polymethylvinylsiloxane [28] . This paper presents new derivatives of octa(3‐thiopropyl)silsesquioxane (SSQ‐8SH) obtained as a result of hydrothiolation of selected commercially available olefins with SSQ‐8SH.…”