Open-air spray plasma deposited UV-absorbing nanocomposite coatings

We demonstrate the deposition of mechanically robust UV-absorbing nanocomposite coatings with a newly developed dual-source deposition method involving ultrasonic spraying and open-air plasma deposition. Nanoparticles and the coating matrix are independently deposited which eliminates difficulties a...

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Bibliographic Details
Published in:Nanoscale 2018-01, Vol.1 (3), p.14525-14533
Main Authors: Ding, Yichuan, Dong, Siming, Hilt, Florian, Dauskardt, Reinhold H
Format: Article
Language:English
Subjects:
Absorption
Accelerated tests
Air plasma
Cerium oxides
Coatings
Mechanical properties
Morphology
Nanocomposites
Nanoparticles
Optical properties
Plasma deposition
Silicon dioxide
Spraying
Substrates
Ultrasonic testing
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Summary:We demonstrate the deposition of mechanically robust UV-absorbing nanocomposite coatings with a newly developed dual-source deposition method involving ultrasonic spraying and open-air plasma deposition. Nanoparticles and the coating matrix are independently deposited which eliminates difficulties associated with preparing composites with high mass fraction of well-dispersed nanoparticles in the matrix. Nanocomposite coatings containing different concentrations of silica, ceria, and both titania and ceria nanoparticles were successfully deposited with good nanoparticle dispersity, high transparency over the visible range, effective absorption in the UV wavelength, and enhanced mechanical properties. Moreover, films were successfully deposited on several substrates including polycarbonate to demonstrate the low processing temperature of this dual-source deposition method. Coatings with different nanoparticle concentrations and film thicknesses were systematically studied in terms of their surface morphology, optical properties and mechanical properties. Accelerated photostability testing of the UV-absorbing nanocomposites demonstrates significantly enhanced performance compared to existing coatings with either a polymeric matrix or organic UV-absorbers. Mechanically robust UV-absorbing nanocomposite coatings with good nanoparticle uniformity and dispersity were deposited using a versatile dual-source deposition method.
ISSN:2040-3364
2040-3372
DOI:10.1039/c8nr04095h