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Chemically stable superhydrophobic polyurethane sponge coated with ZnO/epoxy resin coating for effective oil/water separation.
- Source :
-
Colloids & Surfaces A: Physicochemical & Engineering Aspects . Feb2021, Vol. 611, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- A simple immersion method to fabricate a superhydrophobic polyurethane sponge with oil-water separation efficiency, reusability and chemical stability. • A simple immersion method to fabricate superhydrophobic polyurethane sponge. • This superhydrophobic PU sponge shows excellent oil-water separation efficiency, reusability. • The prepared superhydrophobic PU sponge was stable from pH 1–11, allowing it to be applied in a wide range of environments. In this study, a superhydrophobic polyurethane sponge was prepared by a simple immersion method. The strategy was based on coating a ZnO/epoxy resin solution onto the skeleton of a porous polyurethane sponge, followed by reacting it with a mixture of stearic acid/acetic acid/ethanol solution. The prepared superhydrophobic polyurethane sponge with a contact angle of 156 ± 3° can selectively separate mixtures of water and various oily solvents. The separation efficiencies of the superhydrophobic polyurethane sponge for a variety of oil/water mixtures were all above 98 %. Moreover, the prepared superhydrophobic polyurethane sponge had superior reusability and maintained a separation efficiency of more than 97 % after ten oil/water separation cycles, and it was chemically stable from pH 1–11. This superhydrophobic polyurethane sponge may offer a new oil/water separation strategy due to its excellent separation efficiency, reusability, and chemical stability. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09277757
- Volume :
- 611
- Database :
- Academic Search Index
- Journal :
- Colloids & Surfaces A: Physicochemical & Engineering Aspects
- Publication Type :
- Academic Journal
- Accession number :
- 147845145
- Full Text :
- https://doi.org/10.1016/j.colsurfa.2020.125850