Superhydrophobic Melamine Sponge Coated with Striped Polydimethylsiloxane by Thiol–Ene Click Reaction for Efficient Oil/Water Separation
| Autor: | Quan Yiteng, Peng Jinwen, Deng Junjie, Deng Weixing, Yongyang Gong, Hai Wang, Yuanli Liu, Chuanbai Yu |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Fabrication
Materials science biology Polydimethylsiloxane General Chemical Engineering 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure biology.organism_classification 01 natural sciences Article 0104 chemical sciences Contact angle lcsh:Chemistry chemistry.chemical_compound Sponge Silicone chemistry Chemical engineering lcsh:QD1-999 Click chemistry 0210 nano-technology Melamine |
| Zdroj: | ACS Omega, Vol 3, Iss 5, Pp 5222-5228 (2018) ACS Omega |
| ISSN: | 2470-1343 |
| Popis: | Superhydrophobic and oleophilic sponges have been demonstrated as promising candidates for oil/water separation. However, there are still challenges in large-scale fabrication of superhydrophobic sponges with low cost and feasible method for industrial applications. Herein, we report a superhydrophobic and oleophilic melamine sponge functionalized by a uniform polydimethylsiloxane (PDMS) film that can be easily coated onto the sponge skeleton through UV-assisted thiol-ene click reactions. The PDMS films are characterized by a hierarchically striped microstructure with an average distance less than 2 μm. Because of the striped microstructure and the hydrophobic property of silicone, a high contact angle of 156.2° was achieved. Importantly, the interconnected open-cell structure of the melamine sponge was preserved by adapting the thickness of the PDMS film. The PDMS-coated melamine sponge exhibited a desirable absorption capacity of 103-179 times its own weight with oils and organic solvents. The excellent mechanical properties of melamine and the flexibility of PDMS enable the PDMS-coated melamine sponges to be squeezed repeatedly without collapsing. This study offers a robust and effective approach in large-scale preparation of a superhydrophobic sponge for large-scale oil spill containment and environmental remediation by the inexpensive commercial polymethylvinylsilicone and facile dip-coating/UV-curing method. |
| Databáze: | OpenAIRE |
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