Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 429, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2022.128348
Keywords
Superhydrophobic sponge; Oil-water separation; Poly(phenol-amine) nano aggregation; Oil contaminated water
Categories
Funding
- Ministry of Science and Technology of China for the National Key Research and Development Program of China [2016YFC0400702-6]
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This study presents a low-cost and facile one-step poly(phenol-amine) modification method on melamine sponges. The modified sponges exhibit excellent mechanical properties and demonstrate super-hydrophobicity, high oil-absorption capacity, and outstanding oil-water separation performance.
Although polydopamine (PDA)-related modification is widely studied in the fabrication of superhydrophobic sponges, the high cost of dopamine limits its widespread application. To imitate PDA modification, a low-cost and facile one-step poly(phenol-amine) modification was performed on melamine sponges in this study. Low-cost catechol and diethylenetriamine (DETA) were used as the monomers, and n-dodecanethiol was used as an additive in the one-step modification. The results confirmed that the poly(phenol-amine) aggregations were successfully anchored on the sponge skeleton surface and that the aggregations were formed via the Schiff base reaction and the Michael addition reaction. Furthermore, the as-prepared sponges still showed excellent mechanical properties after modification. Additionally, the optimally modified sponge (MS-0.5) exhibited super-hydrophobic properties with a contact angle value above 150 degrees under various environments, high oil-absorption capacity for various oils and organic solvents, high continuous oil-water separation performance with efficiency greater than 98.8% in 30 cycles, outstanding demulsification performance with 99.52% toward oil-in-water emulsion, and excellent recoverability and long-term stability. Thus, this work provides a feasible facile one-step modification method that can be used in place of PDA-related modification.
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