期刊
ACS APPLIED NANO MATERIALS
卷 4, 期 12, 页码 13643-13654出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.1c03073
关键词
metal rubber; superhydrophobic; carbon nanotube; emulsion separation; mechanical stability
资金
- National Natural Science Foundation of China [52175162, 51735013, 51805086, 51975123]
- Natural Science Foundation of Fujian Province [2019J01210]
- Health Education Joint Project of Fujian Province [2019-WJ-01]
In this study, a superhydrophobic material with a three-dimensional network frame protection was successfully constructed using metal rubber (MR) as the substrate and filling multiwalled carbon nanotubes (MWCNTs) into the pores of MR through poly(dimethylsiloxane) (PDMS) anchoring. The separation mechanism of superhydrophobic MR for emulsions was investigated, and the separation efficiency was predicted by analyzing the depth retention effect. The results demonstrated excellent purification capability and mechanical stability of the prepared superhydrophobic MR for water-in-lubricating oil emulsions.
Poor mechanical stability of the superhydrophobic surface is the fundamental reason that limits its wide application. In the present study, metal rubber (MR) with a three-dimensional elastic porous characteristic was applied as the substrate. Multiwalled carbon nanotubes (MWCNTs) were filled into the pores of MR through suction and filtration of the MWCNTs suspension. Using an in situ bonding method, MWCNTs were anchored in the MR pores by poly(dimethylsiloxane) (PDMS). Consequently, a type of superhydrophobic material with a three-dimensional network frame protection was constructed. The emulsion separation mechanism of superhydrophobic MR was investigated using the plane random segmentation theory and theoretical model of deep filtration. By analysis of the depth retention effect in the separation process, the separation efficiency of the emulsion was predicted. In addition, the results show that the prepared superhydrophobic MR had an excellent purification capability for a water-in-lubricating oil emulsion and outstanding mechanical and chemical stability.
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