[article]
| Titre : |
Improved dyeing ability and UV stability of aramids by finishing with polyvinylamine |
| Type de document : |
texte imprimé |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 125-127 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Absorbeurs de rayonnement ultraviolet
Benzotriazole
Fibre aramide
Fibres textiles -- Propriétés mécaniques
Photostabilité
Polyvinylamine
Résistance au rayonnement ultraviolet
Teinture -- Fibres textiles synthétiques
TriazineUne triazine est l'un des trois isomères du composé organique constitué d'un hétérocycle aromatique de six atomes, dont trois de carbone et trois d'azote. Chacune a donc pour formule C3H3N3.
La structure de la triazine est hétérocycle aromatique, analogue au cycle à six atome du benzène, mais avec trois atomes de carbone remplacés par des atomes d'azote. Les trois isomères correspondent donc aux emplacements respectifs des atomes de carbone et d'azote sur le cycle. On compte ainsi la 1,2,3-triazine, la 1,2,4-triazine, et la 1,3,5-triazine. Les autres hétérocycles aromatiques courant contenant de l'azote sont les azines (en particulier la pyridine) qui contiennent un atome d'azote, les diazines qui contiennent deux et les tétrazines qui en contiennent quatre.
Les triazines sont des bases faibles, plus faibles que la pyridine.
|
| Index. décimale : |
677.4 Textiles artificiels |
| Résumé : |
Aramids are important high-performance fibers, but their usefulness is limited by the comparatively fast UV degradation of the fiber polymers. In addition, aramids are difficult to dye, which increases the cost and complexity of the dyeing procedures and limits the available colors and shades. In the study presented here, it was shown that the finishing of aramids with polyvinylamine improves their dyeability with acidic and reactive dyes. In addition, the polyamine coating was also useful for improving the wash-fastness of UV absorbers coated onto the textiles. Aramids that were finished with UV absorbers showed improved mechanical properties after irradiation with a UV broadband lamp for several hours compared to unmodified samples. Accordingly, this approach represents an interesting starting point for further optimization studies towards aramid textiles with improved UV stability. |
| Note de contenu : |
- Fig. 1 : Photo-induced degradation of aramid fibers and adsorption curves and chemical structures of common UV absorbers
- Fig. 2 : Finishing of aramids with polyvinylamine (2 wt% solution of Lupamin 9095, dipping time : 5 min, fixation time : 2 min, 180°C) and results of different dyeing experiments
- Fig. 3 : Tensile strength of an aramid yarn marde from Kevlar after 6h and 18h irradiation, without (t) and with a triazine-based UV absorber
- Fig. 4 : Tensile strength of an aramid yarn made from Twaron after 6h irradiation, without (reference) and with a benzotriazole (BT) coating |
| En ligne : |
https://drive.google.com/file/d/158JWX22qebooLrO4ddVFr4Oir6CwdcU0/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30988 |
in CHEMICAL FIBERS INTERNATIONAL > Vol. 68, N° 3 (09/2018) . - p. 125-127
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Improved dyeing ability and UV stability of aramids by finishing with polyvinylamine in CHEMICAL FIBERS INTERNATIONAL, Vol. 68, N° 3 (09/2018)
