Ultralight, robustly compressible and super-hydrophobic biomass-decorated carbonaceous melamine sponge for oil/water separation with high oil retention
| Autor: | Liyong Niu, Jinlai Shen, Wei-De Zhang, Peitao Zheng, Chaoyang Wang, Zhiwen Lei, Yu Yang |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
biology General Physics and Astronomy Biomass 02 engineering and technology Surfaces and Interfaces General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Combustion biology.organism_classification 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films chemistry.chemical_compound Sponge chemistry Volume (thermodynamics) Chemical engineering Cellulose 0210 nano-technology Melamine Porosity Pyrolysis |
| Zdroj: | Applied Surface Science. 489:922-929 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2019.06.025 |
| Popis: | To address the high-cost hydrophobic modification of three dimensional commercial sponges, here natural cellulose nanocrystcals (CNCs) were employed to prepare ultralight, robustly compressible and super-hydrophobic biomass-decorated carbonaceous melamine (BCM) sponges by a facile immersing-adsorption-pyrolysis method. Due to the introduction of CNCs, originally pyrolyzed melamine sponges with super-hydrophilicity were changed into the ultralight BCM sponge (7.3 mg cm−3) with super-hydrophobicity and excellent mechanical property. Being applied to the oil/water separation, BCM sponges showed good oil selectivity, high oil absorption capacities up to 201 g/g or 94% of its own volume, and even high oil retention. Simultaneously, the excellent compressibility and good flame retardancy of BCM sponges ensured that the absorbed oil can be recovered by combustion and squeezing methods. Based on super-hydrophobicity, good flexibility and high porosity of BCM sponges, the spilled oils could be also consecutively collected from water surface to collecting vessels by our designed oil collection apparatus. |
| Databáze: | OpenAIRE |
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