Sol-gel treatments to flame retard pa11/flax composites

Samyn, Fabienne; Vandewalle, Maxence; Bellayer, Séverine; Duquesne, Sophie

Type de document :

Article dans une revue scientifique: Article original

DOI :

10.3390/fib7100086

URL permanente :

http://hdl.handle.net/20.500.12210/60684

Titre :

Sol-gel treatments to flame retard pa11/flax composites

Auteur(s) :

Samyn, Fabienne [Auteur]

Unité Matériaux et Transformations (UMET) - UMR 8207
Vandewalle, Maxence [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Bellayer, Séverine [Auteur]

Unité Matériaux et Transformations (UMET) - UMR 8207
Duquesne, Sophie [Auteur]

Laboratoire de structures et propriétés de l'état solide [LSPES]

Titre de la revue :

Fibers

Nom court de la revue :

Fibers

Numéro :

Pagination :

Éditeur :

MDPI

Date de publication :

2019-10-07

ISSN :

079-6439

Mot(s)-clé(s) :

sol-gel
composites
flax fibers
flame retardancy

Discipline(s) HAL :

Chimie/Catalyse

Résumé en anglais : [en]

This work investigates the efficiency of sol–gel treatments to flame retard flax fabric/PA11 composites. Different sol–gel treatments applied to the flax fabrics were prepared using TEOS in combination with phosphorus ...
Lire la suite >This work investigates the efficiency of sol–gel treatments to flame retard flax fabric/PA11 composites. Different sol–gel treatments applied to the flax fabrics were prepared using TEOS in combination with phosphorus and/or nitrogen containing co-precursors (DEPTES, APTES) or additives (OP1230, OP1311). When the nitrogen and the phosphorus co-precursors were used, two coating methods were studied: a ‘one-pot’ route and a successive layer deposition method. For the “one-pot” method, the three precursors (TEOS, DEPTES, and APTES) were mixed together in the same solutions whereas for the different layers deposition method, the three different treatments were deposited on the fibers successively, first the TEOS, then a mix of TEOS/DEPTES, and finally a mix of TEOS/APTES. After deposition, the sol–gel coatings were characterized using scanning electron microscope, electron probe microanalyzer, and 29Si and 31P solid-state NMR. When only TEOS or a mix of TEOS and DEPTES is used, homogeneous coatings are obtained presenting well-condensed Si units (mainly Q units). When APTES is added, the coatings are less homogenous and agglomerates are present. A lower condensation rate of the Si network is also noticed by solid-state NMR. When additives are used in combination with TEOS, the TEOS forms a homogenous and continuous film at the surface of the fibers, but the flame retardants are not well distributed and form aggregates. The flame retardant (FR) efficiency of the different treatments on flax fabrics was evaluated using horizontal flame spread test. The following ranking of the different systems is obtained: TEOS + Additives > TEOS > TEOS + DEPTES ~ TEOS + DEPTES + APTES > multilayers. All the sol–gel coatings improve the flame retardant properties of the flax fabric, except the multilayer treatment. Based on these results, the three most efficient sol–gels were selected to prepare sol–gel-modified flax/PA11 composites. The composite modified with only TEOS showed the best FR properties. Surprisingly, the composite modified with the phosphorus-based flame retardant (AlPi) did not exhibit improved FR properties. This effect was attributed to the fact that the amount of the FR additive deposited on the fabrics was too lowLire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

CNRS
Centrale Lille
ENSCL
INRA
Univ. Artois
Université de Lille

Collections :

Équipe(s) de recherche :

Ingénierie des Systèmes Polymères

Date de dépôt :

2022-03-02T07:14:08Z
2023-02-01T09:20:01Z

Fichiers

fibers-07-00086-v2.pdf
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Ce document est diffusé sous licence Attribution 3.0 United States

Numéro de version	Lien	Date de modification
2	20.500.12210/60684*	2023-02-01T09:15:59Z
1	20.500.12210/60684.1	2022-03-02T07:14:08Z

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Sol-gel treatments to flame retard pa11/flax ...

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