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@article{1636923,
author = {Barbalini, M. and Bertolla, L. and Toušek, Jaromír and Malucelli, G.},
article_location = {Švýcarsko},
article_number = {10},
doi = {http://dx.doi.org/10.3390/polym11101664},
keywords = {sol-gel processes; flame retardancy; cotton; phytic acid; solid state NMR spectroscopy; thermal stability; durability},
language = {eng},
issn = {2073-4360},
journal = {POLYMERS},
title = {Hybrid Silica-Phytic Acid Coatings: Effect on the Thermal Stability and Flame Retardancy of Cotton},
url = {https://www.mdpi.com/2073-4360/11/10/1664/htm},
volume = {11},
year = {2019}
}
TY - JOUR
ID - 1636923
AU - Barbalini, M. - Bertolla, L. - Toušek, Jaromír - Malucelli, G.
PY - 2019
TI - Hybrid Silica-Phytic Acid Coatings: Effect on the Thermal Stability and Flame Retardancy of Cotton
JF - POLYMERS
VL - 11
IS - 10
SP - 1-22
EP - 1-22
PB - MDPI
SN - 20734360
KW - sol-gel processes
KW - flame retardancy
KW - cotton
KW - phytic acid
KW - solid state NMR spectroscopy
KW - thermal stability
KW - durability
UR - https://www.mdpi.com/2073-4360/11/10/1664/htm
L2 - https://www.mdpi.com/2073-4360/11/10/1664/htm
N2 - 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 flame-retardant properties, consequently to the partial removal of the deposited hybrid coatings.
ER -
BARBALINI, M., L. BERTOLLA, Jaromír TOUŠEK and G. MALUCELLI. Hybrid Silica-Phytic Acid Coatings: Effect on the Thermal Stability and Flame Retardancy of Cotton. \textit{POLYMERS}. Švýcarsko: MDPI, 2019, vol.~11, No~10, p.~1-22. ISSN~2073-4360. Available from: https://dx.doi.org/10.3390/polym11101664.
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