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Title: Superhydrophobic anti-ultraviolet films by doctor blade coating

This article reports a scalable technology for fabricating polymer films with excellent water-repelling and anti-ultraviolet properties. A roll-to-roll compatible doctor blade coating technology is utilized to prepare silica colloidal crystal-polymer composites. The silica microspheres can then be selectively removed to create flexible self-standing macroporous polymer films with crystalline arrays of pores. The void sizes are controlled by tuning the duration of a reactive ion etching process prior to the removal of the templating silica microspheres. After surface modification, superhydrophobic surface can be achieved. This study further demonstrates that the as-prepared transparent porous films with 200 nm of pores exhibit diffraction of ultraviolet lights originated from the Bragg's diffractive of light from the three-dimensional highly ordered air cavities.
Authors:
;  [1] ;  [2]
  1. Department of Chemical Engineering, National Chung Hsing University, 250 Kuo Kung Road, Taichung 40227, Taiwan (China)
  2. Department of Environmental Engineering, National Chung Hsing University, 250 Kuo Kung Road, Taichung 40227, Taiwan (China)
Publication Date:
OSTI Identifier:
22392005
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 20; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COATINGS; CRYSTALS; DIFFRACTION; ETCHING; FILMS; MICROSPHERES; POLYMERS; POROUS MATERIALS; SILICA; SURFACES; ULTRAVIOLET SPECTRA