ICCAS OpenIR
Facile creation of hierarchical PDMS microstructures with extreme underwater superoleophobicity for anti-oil application in microfluidic channels
Wu, Dong1; Wu, Si-zhu1; Chen, Qi-Dai1; Zhao, Shuai1; Zhang, Hao1; Jiao, Jian2; Piersol, Jeffrey A.2; Wang, Jian-Nan1; Sun, Hong-Bo1,3; Jiang, Lei4
2011
Source PublicationLAB ON A CHIP
ISSN1473-0197
Volume11Issue:22Pages:3873-3879
AbstractComposition modification and surface microstructures have been widely utilized in interface science to improve the surface performance. In this paper, we observed a significant improvement of oil contact angle (CA) from 66 +/- 2 degrees to 120 +/- 4 degrees by introducing a radical silanol group on a flat PDMS surface through oxygen plasma pretreatment. By combining surface microstructures and plasma modification, we produced three kinds of superoleophobic surfaces: 20 mm pitch micropillar arrays, 2.5 mu m pitch micropillar arrays and gecko foot-like hierarchical microstructures. Among them, the hierarchical surface with high surface roughness showed extreme underwater superoleophobicity, which featured ultrahigh CA (175 +/- 3 degrees) and ultrasmall sliding angle (<1 degrees). Quantitative measurements demonstrated that these superoleophobic surfaces exhibited distinct adhesive behaviors, by which they were interpreted as Wenzel's, Cassie's and the Lotus state, respectively. A microfluidic channel with superoleophobic microstructures was further created by novel curve-assisted imprint lithography, and the characterization based on anti-oil contamination applications was carried out and discussed. We believe that the superoleophobic surfaces will power broad applications in oil microdroplet transportation, anti-oil channels and droplet microfluidic systems.
DOI10.1039/c1lc20226j
Indexed BySCI
Language英语
WOS IDWOS:000296099900016
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:85[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/71690
Collection中国科学院化学研究所
Corresponding AuthorSun, Hong-Bo
Affiliation1.Jilin Univ, State Key Lab Integrated Optoelect, Coll Elect Sci & Engn, Changchun 130023, Peoples R China
2.Univ Missouri, Dept Elect & Comp Engn, Columbia, MO 65211 USA
3.Jilin Univ, Coll Phys, Changchun 130023, Peoples R China
4.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Wu, Dong,Wu, Si-zhu,Chen, Qi-Dai,et al. Facile creation of hierarchical PDMS microstructures with extreme underwater superoleophobicity for anti-oil application in microfluidic channels[J]. LAB ON A CHIP,2011,11(22):3873-3879.
APA Wu, Dong.,Wu, Si-zhu.,Chen, Qi-Dai.,Zhao, Shuai.,Zhang, Hao.,...&Jiang, Lei.(2011).Facile creation of hierarchical PDMS microstructures with extreme underwater superoleophobicity for anti-oil application in microfluidic channels.LAB ON A CHIP,11(22),3873-3879.
MLA Wu, Dong,et al."Facile creation of hierarchical PDMS microstructures with extreme underwater superoleophobicity for anti-oil application in microfluidic channels".LAB ON A CHIP 11.22(2011):3873-3879.
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