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Open AccessArticle

Insulating Thermal and Water-Resistant Hybrid Coating for Fabrics

ISTEC-CNR, Institute of Science and Technology for Ceramics–National Research Council of Italy, Via Granarolo 64, I-48018 Faenza (RA), Italy
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Coatings 2020, 10(1), 72; https://doi.org/10.3390/coatings10010072
Received: 22 November 2019 / Revised: 8 January 2020 / Accepted: 10 January 2020 / Published: 14 January 2020
(This article belongs to the Special Issue Advanced Hybrid Coatings and Thin Films for Surface Functionalization)
Organic–inorganic hybrid (ceramer) coatings were synthesized and deposited on the polyester nonwoven fabrics through the sol–gel process. This promoted the formation of an insulating barrier that was able to enhance the thermal stability and the hydrophobicity of fabrics. The hybrid phase is made of an organic network arising from different alkoxysilane precursors (trimethoxymethylalkoxysilane (TMEOS), 3-aminopropyl-trimethoxyalkoxysilane (APTMS), and tetraethylorthosilicate (TEOS)) and inorganic phase made of titanium dioxide TiO2 nanoparticles (NPs) and, in some cases, coated by P-based compound. The characterization of hybrid phase at liquid (size distribution and zeta potential of dispersed nanoparticles), dried state (crystalline phase, thermogravimetric (TGA), and Fourier transform infrared spectroscopic (FTIR) analyses), and on deposited coatings (contact angle, burn-out tests) aimed to find a correlation between the physicochemical properties of ceramer and functional performances of coated fabrics (thermal stability and hydrophobicity). The results showed that all ceramer formulations were able to improve the char formation after burn-out, in particular the highest thermal stability was obtained in the presence of TMEOS precursor and TiO2 NPs coated by P-based compound, which also provided the highest hydrophobicity. In conclusion, we presented an environmentally friendly and easily scalable process for the preparation of ceramer formulations capable of being formed into transparent, thermal-resistant, and hydrophobic fabric coatings, whose functions are extremely challenging for the textile market. View Full-Text
Keywords: organic–inorganic hybrid; sol–gel process; ceramer; thermal stability; fabrics organic–inorganic hybrid; sol–gel process; ceramer; thermal stability; fabrics
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Ortelli, S.; Costa, A.L. Insulating Thermal and Water-Resistant Hybrid Coating for Fabrics. Coatings 2020, 10, 72.

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