Journal
JOURNAL OF WATER PROCESS ENGINEERING
Volume 46, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jwpe.2022.102590
Keywords
V-PDMS/PS sponge; Dual-emulsion template; Oil sorption; Superhydrophobicity; Recyclability
Funding
- Natural Science Foundation of China [50972060, 21776002]
- Environmental Protection Scientific Research Project of Jiangsu Province [2016056]
- Natural Science Foundation of Anhui Province Education Department [KJ2020A0274]
- Qing Lan Project - Priority Academic Program Development of Jiangsu Higher Education Institutions
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In this study, a superhydrophobic vinyl-terminated polydimethylsiloxane embedded polystyrene sponge with a hierarchical structure was constructed for efficient oil-water separation. The sponge material exhibited outstanding oil collection performance, excellent recyclability, superhydrophobicity, and superoleophilicity.
Superhydrophobic vinyl terminated polydimethylsiloxane embedded polystyrene sponge (V-PDMS/PS) with hierarchical structure for efficient oil-water separation was constructed by the dual-emulsion-template route, based on polymerization of the water-in-oil (W/O) type high internal phase emulsions (HIPEs). A series of vinyl terminated polydimethylsiloxane (V-PDMS) was adopted as the organic phase as well as the hydrophobic modification reagent. Finally, the sponge material was composed of polystyrene (PS) skeleton embedded with V-PDMS chain, which exhibited an enhanced thermal stability compared with the pure polystyrene sponge. The obtained sponge exhibited an outstanding oil collection performance of 55.6 g/g-119.5 g/g towards represen-tative oil pollutant. The polystyrene sponge features excellent recyclability, with about 90% recovery rate just by simple compression. Besides, it showed superhydrophobicity with water contact angles (WCAs) exceeding 150 degrees, deriving from the hierarchically porous structure and the low-surface-energy of the V-PDMS. It also exhibited superoleophilicity with oil contact angle approaching 0 degrees.
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