Thermally stable and superhydrophobic foam prepared by high‐internal phase emulsion for oil/water separation with good recycling capacity

Abstract

Superhydrophobic polymeric foams, with good thermal stability and highrecycling capacity to remove oil from oily wastewater, are highly desirable for current oily wastewater purification. Herein, poly (styrene-acrylic acid 2,2,3,4,4,4-hexafluoro-butyl ester-divinylbenzene) foam with porosity as high as 99.27% has been prepared through high-internal phase emulsions. Therein, poly (cyclotriphosphazene-co-4,4 0 -sulfonyldiphenol) microspheres, and Span80 act as co-emulsifier to stabilize the emulsion system. The as-prepared foams exhibited super hydrophobicity with a water contact angle of 150.3 and thermal stability. Additionally, the oil adsorption capacity of the porous material could reach up to 25.6-53.4 times its mass with accessible and high-recycling capacity. These aforementioned outstanding properties make our superhydrophobic foam hold potential applications in oil/water separation.

Bringing Sustainability to Macroporous Polystyrene: Cellulose Nanocrystals as Cosurfactant and Surface Modifier in Deep Eutectic Solvent-Based Emulsion Templating

“…Due to their high porosities and high specific surface areas, porous polymers can absorb/adsorb solute molecules dispersed in water. Functionalized materials possessing ionic functional groups such as carboxylic acid, sulfonic acid, and amine groups are able to absorb/adsorb ionic dyes or metal ions from wastewater. , The functionalization of CNCs with OAc/ChCl allowed the presence of carboxylic acid groups in the porous surface of the synthesized polyHIPEs as it was demonstrated by FTIR. Therefore, we explored the prospective application of p20S-ZCNC and p20S-0.1P as dye adsorbents due to the suitable chemical functionalities at the monoliths surface.…”

Fabrication of three‐dimensional porous superhydrophobic composites for immiscible and emulsified oil/water mixture separation

“…Nanospheres were prepared using a precipitation method, [33] in which 0.8 g HCCP and 1.74 g BPS were ultrasonically dispersed in a single-necked flask containing 200 ml of acetonitrile. After adding 8 ml of triethylamine, the reaction was sonicated at 50 C for 4 h. Then, the product was centrifuged and washed several times with acetone and deionized water.…”

3D‐Printed Robust Dual Superlyophobic Ti‐Based Porous Structure for Switchable Oil/Water Emulsion Separations

“…[ 31 ] Furthermore, fabric and fiber substrates are easily degraded at high temperatures, [ 32 ] and sponge and foam substrates cannot withstand high pressure. [ 33 ] Moreover, the mesh pore size of these commercial porous materials cannot be easily tuned, and they are usually manufactured according to market standards, [ 34 ] which limits the separation properties of these materials (e.g., liquid flux and separation purity). Therefore, there is an urgent need for a solvent‐free preparation method that controls the structure and pore size of porous materials to develop switchable superwetting porous materials with high wear resistance and corrosion resistance.…”