Fire-resistant coatings, obtained by layer-by-layer assembly, in the system of silicic acid gel – diammonium hydrogen phosphate – urea

0577558 - ÚTAM 2024 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
Skorodumova, O. - Sharshanov, A. - Chebotaryova, O. - Kurepin, V. - Sotiriadis, Konstantinos
Fire-resistant coatings, obtained by layer-by-layer assembly, in the system of silicic acid gel – diammonium hydrogen phosphate – urea.
Key Engineering Materials. Vol. 954. Baech: Trans Tech Publications, 2023 - (Andronov, V.; Otrosh, Y.; El Moussaouy, A.), s. 157-165. ISBN 978-3-0364-0399-1. ISSN 1013-9826. E-ISSN 1662-9795.
[International scientific applied conference Problems of emergency situations. PES 2023. Charkov (UA), 19.05.2023-19.05.2023]
Institucionální podpora: RVO:68378297
Klíčová slova: SiO2 sols * fire-resistant coatings * cotton-containing textile materials * sol-gel method * layer-by-layer assembly * liquid glass * fire resistance
Obor OECD: Materials engineering
https://doi.org/10.4028/p-S5rvlA

The paper discusses the influence of flame retardant compositions obtained in the system of silicic acid sol (SiO2 sol) – flame retardants on the fire retardant properties of thin dense cotton fabrics and low density voluminous tapestry fabrics. The need to develop the optimal composition of a fire-retardant composition for a specific fabric, or to unify it for two main groups of fabric: thin and bulky low-density ones, is substantiated. Experimental coatings were obtained by applying SiO2 sol, which was obtained by the reaction between liquid glass and acetic acid, followed by application of flame retardant solutions (diammonium hydrogen phosphate (DAHP) and urea) by spraying or by the bath method. As a result of the optimization, using the central composite uniform rotatable plan of the second order, it was established that the main effect of the flame retardant is exerted by diammonium hydrogen phosphate (DAHP). The content or concentration of urea depends on the concentration of DAHP used: if diluted DAHP solutions (9–10 %) are used, trace amounts of urea (0–0.5 %) must be added. In the case of using a concentrated DAHP solution (18–20 %), the concentration of the urea solution should also be increased to 8–10 %.
Trvalý link: https://hdl.handle.net/11104/0346675