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Proceedings Paper

UV protection of ultra-thin ZnO film on viscose
Author(s): M. C. Popescu; F. Nastase; I. Mihalache; M. A. Banu; V. Tucureanu; C. Ungureanu; B. C. Tincu; R. M. Tomescu
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Paper Abstract

In this paper we aim to develop a summer garment with improved ultraviolet (UV) protection. Due to its lightweight and breathability, cellulose-based viscose rayon was selected to be covered with inorganic ZnO film. Atomic layer deposition (ALD) is a modern technique that delivers uniform coatings with controlled thickness. Viscose fragments were evenly covered with ZnO at 120°C in high vacuum, and their properties were tested against UV exposure and wettability. Morphological examination conducted by scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) elemental analysis demonstrated the uniform deposition of ZnO onto the porous semi-synthetic material. The bond structure of cellulose-ZnO composite was assessed by Fourier-transform infrared spectroscopy (FTIR). High wettability of viscose was restrained by the ZnO superficial layer, as revealed by contact angle measurements. Optical absorbance and transmittance evaluated by diffuse reflectance spectroscopy (DRS) displayed the increase of the absorption peak below the 400 nm wavelength in dry and wet conditions, after the ZnO functionalization.

Paper Details

Date Published: 31 December 2018
PDF: 8 pages
Proc. SPIE 10977, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies IX, 1097709 (31 December 2018); doi: 10.1117/12.2324261
Show Author Affiliations
M. C. Popescu, IMT Bucharest (Romania)
F. Nastase, IMT Bucharest (Romania)
I. Mihalache, IMT Bucharest (Romania)
M. A. Banu, IMT Bucharest (Romania)
Univ. of Bucharest (Romania)
V. Tucureanu, IMT Bucharest (Romania)
Transylvania Univ. of Brasov (Romania)
C. Ungureanu, Univ. Politehnica of Bucharest (Romania)
B. C. Tincu, IMT Bucharest (Romania)
Univ. Politehnica of Bucharest (Romania)
R. M. Tomescu, IMT Bucharest (Romania)

Published in SPIE Proceedings Vol. 10977:
Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies IX
Marian Vladescu; Razvan D. Tamas; Ionica Cristea, Editor(s)

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