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Durable omniphobicity of oil-impregnated anodic aluminum oxide nanostructured surfaces
- Source :
- Journal of Colloid and Interface Science. 553:734-745
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Recently, various types of porous surfaces have been demonstrated for lubricant (e.g., oil) impregnated omniphobic surfaces. However, the retention of the lubricating liquid within the porous layer and the omniphobic durability still remain challenges. Here, the omniphobic durability of the oil-impregnated surfaces of various types of anodic aluminum oxide (AAO) nanostructures is investigated. The oil impregnation into nanoporous AAO with high porosity enhances droplet mobility by eliminating the pinning site of a contact line on the solid surface, whereas that with low porosity allows the pinning site to result in less mobility. In the cases of nanopillared AAO layers, although the oil-impregnation enhances the repellency to liquids, oil is prone to be depleted by external force such as fluid flow due to the nature of the interconnected oil through the passages between pillars, which limits the omniphobic durability. Among the various types of nanostructured AAO surfaces, the AAO with isolated pore geometry with high porosity exhibits the most durable omniphobicity for a wide range of liquids including organic liquids with low surface tensions. Moreover, the nanoporous AAO surface shows great anti-bacterial adhesion property, reducing the adhesion of bacteria (Escherichia coli K-12) up to 99.2% compared to a bare aluminum surface.
- Subjects :
- Nanostructure
Materials science
Anodic Aluminum Oxide
Nanoporous
chemistry.chemical_element
02 engineering and technology
Adhesion
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Durability
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Biomaterials
Colloid and Surface Chemistry
chemistry
Chemical engineering
Aluminium
Lubricant
0210 nano-technology
Porosity
Subjects
Details
- ISSN :
- 00219797
- Volume :
- 553
- Database :
- OpenAIRE
- Journal :
- Journal of Colloid and Interface Science
- Accession number :
- edsair.doi.dedup.....fd695f4c98cf8010fc8470d82e1e6fe7