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Hierarchical rough surfaces formed by LBL self-assembly for oil-water separation
Alternative TitleJ. Mater. Chem. A
Li, Xiaoyu1; Hu, Dan1,2; Huang, Kun1; Yang, Chuanfang1
2014-08-14
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
Volume2Issue:30Pages:11830-11838
AbstractControlled assembly of nanoscale building units to form special micro-/nanostructures is of interest for achieving desired properties in many practical applications. The raspberry- or strawberry-like hierarchical structure with multi-level dimensions is one example of special surface wettability design. In this work, a series of coatings with hierarchical nanostructure and dual roughness are constructed on sintered stainless steel mesh and stainless steel fiber felt via layer-by-layer self-assembly of SiO2 nanoparticles having different sizes. The surface is then chemically treated to obtain the wetting properties needed for intended separation of oil from water. The surface morphology of the coatings is observed using scanning electron microscopy and atomic force microscopy. The surface wetting properties are investigated by measuring the coatings' water and oil contact angle in air and under water. The results show that the stainless steel mesh with such coatings has superhydrophobicity, and thus can efficiently separate regular oil water mixtures. Furthermore, the stainless steel fiber felt treated with similar coatings can also separate oil-in-water emulsions through the non-sieving coalescence mechanism, achieving an oil water separation efficiency as high as 99.4%.; Controlled assembly of nanoscale building units to form special micro-/nanostructures is of interest for achieving desired properties in many practical applications. The raspberry- or strawberry-like hierarchical structure with multi-level dimensions is one example of special surface wettability design. In this work, a series of coatings with hierarchical nanostructure and dual roughness are constructed on sintered stainless steel mesh and stainless steel fiber felt via layer-by-layer self-assembly of SiO2 nanoparticles having different sizes. The surface is then chemically treated to obtain the wetting properties needed for intended separation of oil from water. The surface morphology of the coatings is observed using scanning electron microscopy and atomic force microscopy. The surface wetting properties are investigated by measuring the coatings' water and oil contact angle in air and under water. The results show that the stainless steel mesh with such coatings has superhydrophobicity, and thus can efficiently separate regular oil water mixtures. Furthermore, the stainless steel fiber felt treated with similar coatings can also separate oil-in-water emulsions through the non-sieving coalescence mechanism, achieving an oil water separation efficiency as high as 99.4%.
KeywordMesoporous Silica Nanoparticles Superhydrophobic Surfaces Pvdf Membranes Coatings Fabrication Mesh Emulsions Efficiency Sorbent
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1039/c4ta01569j
URL查看原文
Indexed BySCI
Language英语
WOS KeywordMESOPOROUS SILICA NANOPARTICLES ; SUPERHYDROPHOBIC SURFACES ; PVDF MEMBRANES ; COATINGS ; FABRICATION ; MESH ; EMULSIONS ; EFFICIENCY ; SORBENT
WOS Research AreaChemistry ; Energy & Fuels ; Materials Science
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS IDWOS:000339535100038
Citation statistics
Cited Times:49[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/10930
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Being 100049, Peoples R China
Recommended Citation
GB/T 7714
Li, Xiaoyu,Hu, Dan,Huang, Kun,et al. Hierarchical rough surfaces formed by LBL self-assembly for oil-water separation[J]. JOURNAL OF MATERIALS CHEMISTRY A,2014,2(30):11830-11838.
APA Li, Xiaoyu,Hu, Dan,Huang, Kun,&Yang, Chuanfang.(2014).Hierarchical rough surfaces formed by LBL self-assembly for oil-water separation.JOURNAL OF MATERIALS CHEMISTRY A,2(30),11830-11838.
MLA Li, Xiaoyu,et al."Hierarchical rough surfaces formed by LBL self-assembly for oil-water separation".JOURNAL OF MATERIALS CHEMISTRY A 2.30(2014):11830-11838.
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