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# Thickness characterization toolbox for transparent protective coatings on polymer substrates

Matthias Van Zele (UGent) , Jonathan Watté (UGent) , Jan Hasselmeyer (UGent) , Hannes Rijckaert (UGent) , Steven Verstuyft (UGent) , Davy Deduytsche (UGent) , Isabel Van Driessche (UGent) , et al.
(2018) 11(7).
Author
Organization
Abstract
The thickness characterization of transparent protective coatings on functional, transparent materials is often problematic. In this paper, a toolbox to determine the thicknesses of a transparent coating on functional window films is presented. The toolbox consists of a combination of secondary ion mass spectrometry and profilometry and can be transferred to other transparent polymeric materials. A coating was deposited on designed model samples, which were characterized with cross-sectional views in transmission and in scanning/transmission electron microscopy and ellipsometry. The toolbox was then used to assess the thicknesses of the protective coatings on the pilot-scale window films. This coating was synthesized using straightforward sol-gel alkoxide chemistry. The kinetics of the condensation are studied in order to obtain a precursor that allows fast drying and complete condensation after simple heat treatment. The shelf life of this precursor solution was investigated in order to verify its accordance to industrial requirements. Deposition was performed successfully at low temperatures below 100 °C, which makes deposition on polymeric foils possible. By using roll-to-roll coating, the findings of this paper are easily transferrable to industrial scale. The coating was tested for scratch resistance and adhesion. Values for the emissivity (ε) of the films were recorded to justify the use of the films obtained as infrared reflective window films. In this work, it is shown that the toolbox measures similar thicknesses to those measured by electron microscopy and can be used to set a required thickness for protective coatings.
Keywords
coating materials, inorganic materials, surfaces and interfaces, sol-gel processes, low-emissivity, SIMS, LOW-EMISSIVITY COATINGS, THIN-FILMS, BUFFER LAYERS, SI-29 NMR, DURABILITY, RESISTANCE, CONDENSATION, SPECTROSCOPY, DEGRADATION, DEPOSITION

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## Citation

Chicago
Van Zele, Matthias, Jonathan Watté, Jan Hasselmeyer, Hannes Rijckaert, Yannick Vercammen, Steven Verstuyft, Davy Deduytsche, et al. 2018. “Thickness Characterization Toolbox for Transparent Protective Coatings on Polymer Substrates.” Ed. Dirk Poelman. Materials 11 (7).
APA
Van Zele, M., Watté, J., Hasselmeyer, J., Rijckaert, H., Vercammen, Y., Verstuyft, S., Deduytsche, D., et al. (2018). Thickness characterization toolbox for transparent protective coatings on polymer substrates. (D. Poelman, Ed.)MATERIALS, 11(7).
Vancouver
1.
Van Zele M, Watté J, Hasselmeyer J, Rijckaert H, Vercammen Y, Verstuyft S, et al. Thickness characterization toolbox for transparent protective coatings on polymer substrates. Poelman D, editor. MATERIALS. 2018;11(7).
MLA
Van Zele, Matthias, Jonathan Watté, Jan Hasselmeyer, et al. “Thickness Characterization Toolbox for Transparent Protective Coatings on Polymer Substrates.” Ed. Dirk Poelman. MATERIALS 11.7 (2018): n. pag. Print.
@article{8567244,
abstract     = {The thickness characterization of transparent protective coatings on functional, transparent materials is often problematic. In this paper, a toolbox to determine the thicknesses of a transparent coating on functional window films is presented. The toolbox consists of a combination of secondary ion mass spectrometry and profilometry and can be transferred to other transparent polymeric materials. A coating was deposited on designed model samples, which were characterized with cross-sectional views in transmission and in scanning/transmission electron microscopy and ellipsometry. The toolbox was then used to assess the thicknesses of the protective coatings on the pilot-scale window films. This coating was synthesized using straightforward sol-gel alkoxide chemistry. The kinetics of the condensation are studied in order to obtain a precursor that allows fast drying and complete condensation after simple heat treatment. The shelf life of this precursor solution was investigated in order to verify its accordance to industrial requirements. Deposition was performed successfully at low temperatures below 100 {\textdegree}C, which makes deposition on polymeric foils possible. By using roll-to-roll coating, the findings of this paper are easily transferrable to industrial scale. The coating was tested for scratch resistance and adhesion. Values for the emissivity (\ensuremath{\epsilon}) of the films were recorded to justify the use of the films obtained as infrared reflective window films. In this work, it is shown that the toolbox measures similar thicknesses to those measured by electron microscopy and can be used to set a required thickness for protective coatings.},
articleno    = {1101},
author       = {Van Zele, Matthias and Watt{\'e}, Jonathan and Hasselmeyer, Jan and Rijckaert, Hannes and Vercammen, Yannick and Verstuyft, Steven and Deduytsche, Davy and Debecker, Damien P and Poleunis, Claude and Van Driessche, Isabel and De Buysser, Klaartje},
editor       = {Poelman, Dirk},
issn         = {1996-1944},
journal      = {MATERIALS},
language     = {eng},
number       = {7},
pages        = {13},
title        = {Thickness characterization toolbox for transparent protective coatings on polymer substrates},
url          = {http://dx.doi.org/10.3390/ma11071101},
volume       = {11},
year         = {2018},
}


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