Preparation of hydrophobic stearic acid-modified Fe3O4/graphite oxide/melamine sponge for oil-water separation. (1st December 2022)

• Record Type: Journal Article
• Authors: Lin, Bo; Chen, Wan-Yi; Lam, Kwok-Ho; Shi, Na; Shi, Bo; Yang, Ying; Yang, Yu-Ma; He, Fu-An; Jiang, Li-Wang
• Is Part Of: Surface topography. Volume 10:Number 4(2022)
• Publication Date: 2022-12-01
• Subjects: stearic acid-modified Fe3O4 -- graphite oxide -- aminopropyltriethoxysilane -- hydrophobic melamine sponge -- oil-water separation; Surfaces (Physics) -- Periodicals; Surfaces (Physics) -- Measurement -- Periodicals; 530.417
• DOI: 10.1088/2051-672X/aca10e
• Languages: English
• ISSNs: 2051-672X

Abstract

Abstract: A fluorine-free strategy was developed for the hydrophobic modification of the melamine (MA) sponge, in which both the stearic acid-modified Fe3 O4 nanoparticles (SA-Fe3 O4 ) and the graphite oxide were immobilized on the MA sponge with the use of 3-aminopropyltriethoxysilane by a drop-coating method to prepare the SA-Fe3 O4 /GO/MA sponge for oil-water separation. The structure of the SA-Fe3 O4 /GO/MA sponge was investigated by FITR, WAXD, SEM, two-dimensional EDS mapping, TGA, and VSM. The contact angles of the SA-Fe3 O4 /GO/MA sponge prepared with different amounts of SA-Fe3 O4 and GO were in the range of 140.2° − 145.0°, which confirmed the successful hydrophobic surface modification for the MA sponge. The demonstrations exhibited that the SA-Fe3 O4 /GO/MA sponge could separate the oil from the oil-water mixture by both direct absorption and gravity-driven filtration. Additionally, the SA-Fe3 O4 /GO/MA sponge possessed not only high absorption capacities for peanut oil, n-hexane, soybean oil, and diesel oil, but also good abilities of being able to recollect magnetically and reuse. The proposed preparation strategy and overall performance of SA-Fe3 O4 /GO/MA sponge were promising for the oil-water separation in the future.