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Superoleophobic surfaces and methods of making them

A technology of products and nanoparticles, applied in the direction of pollution prevention methods, chemical instruments and methods, and techniques for producing decorative surface effects, etc., to achieve the effects of reducing costs, reducing environmental impact, and simplifying production methods

Inactive Publication Date: 2017-09-12
UNIV OF WESTERN ONTARIO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the number of substrate surfaces on which these surface morphologies can be generated has been limited

Method used

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  • Superoleophobic surfaces and methods of making them
  • Superoleophobic surfaces and methods of making them
  • Superoleophobic surfaces and methods of making them

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0053] Materials and methods

[0054] Negative photoresist SU-8 (epoxy resin, cyclopentanone (as an organic solvent), triarylsulfonium salt (as a cationic photoinitiator)), negative photoresist KMPR (modified epoxy resin, cyclopentanone Pentanone, triarylsulfonium, propylene carbonate (propylene carbonate, propylene carbonate) and SU-8 developer (1-methoxy-2 propyl acetate) were purchased from MicroChem Corporation, Newton, MA, USA. 1H,1H,2H,2H-Perfluorooctyl-trichlorosilane (97%) was a product from Sigma-Aldrich. Use H 2 o 2 (30%) and H 2 SO 4 The (fuming) solution was prepared as a piranha solution (Piranha solution) at a ratio of 3:7 vol / vol. All chemicals are received ready to use. The pattern on the photomask was designed using L-Edit software and subsequently printed on chrome glass with a high-resolution image setup system (Nanofab, Alberta University). Spin coater (Solitec 5110Spinner) and lithography machine (mask aligner, mask aligner) (Karl30Suss MA6) were ...

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Abstract

Disclosed herein is a substrate having a surface modified to impart multi-scale roughness, thereby providing superhydrophobic and / or superoleophobic properties. The surface includes a pattern of microscale pillars covered by a plurality of nanoparticles having a concave-convex shape. The area fraction of the surface is also selected to provide the desired superoleophobic properties. Also disclosed herein is a method for producing a modified surface comprising photolithography, optionally followed by vapor deposition. The substrate can be formed into useful articles or applied to preformed articles.

Description

technical field [0001] Disclosed herein are substrates having a surface morphology that is modified to impart desired oleophobic or superoleophobic properties to the surface. Surface morphology may include microscale pillars covered (topped with) nanoparticles (which may be approximately spherical). Also disclosed is photolithography for modifying the surface of a substrate to produce a desired surface morphology, which may be combined with vapor deposition. Background technique [0002] Attempts have been made to modify the surface of substrates to impart desired properties. For example, superoleophobicity has been observed to emerge on structures with multiscale roughness and reentrant / overhanging features. However, there is a need for superoleophobic surfaces with larger contact angles for organic liquids. There is a need for simplified methods for producing superoleophobic surfaces, especially methods with a reduced number of steps. There is a need for simplified met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B81C1/00B81B7/04B82Y30/00C08J7/12
CPCB82Y30/00B81C1/00206B81B2203/0361Y10T428/24372Y10T428/24405B81C1/00031G03F7/2024C03C2217/76B08B17/065G03F7/0037G03F7/004
Inventor 杨军李庭杰马克西姆·帕利王晓龙纳塔莉·苏汉
Owner UNIV OF WESTERN ONTARIO