Hybrid silica-phytic acid coatings: Effect on the thermal stability and flame retardancy of cotton

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F19%3A00510622" target="_blank" >RIV/68081723:_____/19:00510622 - isvavai.cz</a>

Alternative codes found

RIV/00216224:14740/19:00113290

Result on the web

<a href="https://www.mdpi.com/2073-4360/11/10/1664/htm" target="_blank" >https://www.mdpi.com/2073-4360/11/10/1664/htm</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/polym11101664" target="_blank" >10.3390/polym11101664</a>

Result language

angličtina

Original language name

Hybrid silica-phytic acid coatings: Effect on the thermal stability and flame retardancy of cotton

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Polymers

ISSN

2073-4360

e-ISSN

—

Volume of the periodical

11

Issue of the periodical within the volume

10

Country of publishing house

CH - SWITZERLAND

Number of pages

22

Pages from-to

1664

UT code for WoS article

000495382700133

EID of the result in the Scopus database

2-s2.0-85073391484