Kudaibergenova Rabiga M, Roman Fernanda F, Silva Adriano S, Sugurbekova Gulnar K
Department of Chemistry and Chemical Technology, Faculty of Technology, M. Kh. Dulaty Taraz University, 60 Tole Bi Street, Taraz 080000, Kazakhstan.
CIMO, LA SusTEC, Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal.
Nanomaterials (Basel). 2024 Dec 3;14(23):1942. doi: 10.3390/nano14231942.
In this work, the simple fabrication of a new superhydrophobic magnetic sponge based on CNTs, NiFeO nanoparticles, and PDMS was investigated. CNTs were synthesized by chemical vapor deposition (CVD) on a nickel ferrite catalyst supported on aluminum oxide (NiFeO/AlO). The synthesis of nickel ferrite (NiFe) was accomplished using the sol-gel method, yielding magnetic nanoparticles (43 Amkg, coercivity of 93 Oe, 21-29 nm). A new superhydrophobic magnetic PU/CNT/NiFeO/PDMS sponge was fabricated using a polyurethane (PU) sponge, CNTs, NiFeO nanoparticles, and polydimethylsiloxane (PDMS) through the immersion coating method. The new PU/CNT/NiFeO/PDMS sponge exhibits excellent superhydrophobic/oleophilic/mechanical properties and water repellency (water absorption rate of 0.4%) while having good absorption of oil, olive oil, and organic liquids of different densities (absorption capacity of 21.38 to 44.83 g/g), excellent separation efficiency (up to 99.81%), the ability to be reused for removing oil and organic solvents for more than 10 cycles, and easy control and separation from water using a magnet. The new PU/CNT/NiFeO/PDMS sponge is a promising candidate as a reusable sorbent for collecting oil and organic pollutants and can also be used as a hydrophobic filter due to its excellent mechanical properties.
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