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01.06.2015 | Original Paper

Functionalization of cellulose fibres with DOPO-polysilsesquioxane flame retardant nanocoating

verfasst von: Jelena Vasiljević, Ivan Jerman, Gregor Jakša, Jenny Alongi, Giulio Malucelli, Milena Zorko, Brigita Tomšič, Barbara Simončič

Erschienen in: Cellulose | Ausgabe 3/2015

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Abstract

The preparation of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide-functionalised polysilsesquioxane (Si-DOPO)-coating was described and its flame retardant efficiency for cotton fabric was thoroughly investigated. The 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide–vinyltrimethoxysilane (DOPO–VTS) was synthesized and applied to cotton fabrics at different concentrations using a sol–gel process. The structure of the synthesized DOPO–VTS was characterized using Fourier-transform infrared spectroscopy and nuclear magnetic resonance spectroscopy. The characteristics of the Si-DOPO coatings formed on the cotton fibres were investigated using X-ray photoelectron spectroscopy, time-of-flight-secondary ion mass spectrometry and scanning electron microscopy. The flame retardant properties of the Si-DOPO-coated cotton samples were evaluated by thermogravimetric analyses, vertical flame spread tests and cone calorimetry analyses. The Si-DOPO coating increased the thermo-oxidative stability of the cotton fibres by increasing the stability of the protective char and inhibited cellulose fibres degradation. The Si-DOPO coating did not decrease the time of flaming combustion but did completely stop the vigorous combustion of the fibres. The results also suggest that the flame retardation by the Si-DOPO coating is due to the quenching of active radicals from the decomposing cellulose and the cellulose phosphorylation by the DOPO component as well as the silicon oxide formation by the silsesquioxane component on the fibre surface. These findings indicate that the flame retardant efficiency of the Si-DOPO coating can be ascribed to the combined activity of phosphorus acting in both gas and condensed phases and silicon acting in the condensed phase.

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Nächster Artikel Thermal–mechanical behaviour of chitosan–cellulose derivative thermoreversible hydrogel films

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Titel: Functionalization of cellulose fibres with DOPO-polysilsesquioxane flame retardant nanocoating
verfasst von: Jelena Vasiljević
Ivan Jerman
Gregor Jakša
Jenny Alongi
Giulio Malucelli
Milena Zorko
Brigita Tomšič
Barbara Simončič
Publikationsdatum: 01.06.2015
Verlag: Springer Netherlands
Erschienen in: Cellulose / Ausgabe 3/2015
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI: https://doi.org/10.1007/s10570-015-0599-x

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