Počet záznamů: 1
Hybrid silica-phytic acid coatings: Effect on the thermal stability and flame retardancy of cotton
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SYSNO ASEP 0510622 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Hybrid silica-phytic acid coatings: Effect on the thermal stability and flame retardancy of cotton Tvůrce(i) Barbalini, M. (IT)
Bertolla, Luca (UFM-A) ORCID
Toušek, J. (CZ)
Malucelli, G. (IT)Celkový počet autorů 4 Číslo článku 1664 Zdroj.dok. Polymers. - : MDPI
Roč. 11, č. 10 (2019)Poč.str. 22 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova Cotton ; Durability ; Flame retardancy ; Phytic acid ; Sol-gel processes ; Solid state NMR spectroscopy ; Thermal stability Vědní obor RIV JI - Kompozitní materiály Obor OECD Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics Způsob publikování Open access Institucionální podpora UFM-A - RVO:68081723 UT WOS 000495382700133 EID SCOPUS 85073391484 DOI 10.3390/polym11101664 Anotace New hybrid sol-gel coatings based on tetraethoxysilane (TEOS) and phytic acid (PA) were designed and applied to cotton, the flame-retardant properties of the treated fabrics were thoroughly investigated by means of flame-spread and forced-combustion tests. The first goal was to identify the TEOS:PA weight ratio that allowed the achievement of the best flame-retardant properties, with the lowest final dry add-on on the fabrics. Therefore, different TEOS:PA sols were prepared and applied to cotton, and the resulting coated fabrics were thoroughly investigated. In particular, solid-state NMR spectroscopy was exploited for assessing the condensation degree during the sol-gel process, even for evaluating the occurrence of possible reactions between phytic acid and the cellulosic substrate or the alkoxy precursor. It was found that a total dry add-on of 16 wt. % together with 70:30 TEOS:PA weight ratio provided cotton with self-extinction, as clearly indicated by flame-spread tests. This formulation was further investigated in forced-combustion tests: a significant reduction of heat release rate (HRR), of the peak of HRR, and of total heat release (THR) was found, together with a remarkable increase of the residues after the test. Unfortunately, the treated fabrics were not resistant to washing cycles, as they significantly lost their flameretardant properties, consequently to the partial removal of the deposited hybrid coatings. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2020 Elektronická adresa https://www.mdpi.com/2073-4360/11/10/1664/htm
Počet záznamů: 1