Polypyrrole-modified multi-functional coatings for improved electro-conductive, hydrophilic and flame-retardant properties of polyamide 66 textiles / Chanchal Kumar Kundu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 4 (07/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 4 (07/2023) . - p. 1223-1234 Titre : Polypyrrole-modified multi-functional coatings for improved electro-conductive, hydrophilic and flame-retardant properties of polyamide 66 textiles Type de document : texte imprimé Auteurs : Chanchal Kumar Kundu, Auteur ; Zhiwei Li, Auteur ; M. Azizur R. Khan, Auteur ; Oisik Das, Auteur Année de publication : 2023 Article en page(s) : p. 1223-1234 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Conduction électrique Essais de comportement au feu Essais dynamiques Formulation (Génie chimique) Hydrophilie Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Matériaux -- Propriétés fonctionnelles Morphologie (matériaux) Polyamide 66 Polypyrroles Surfaces -- Analyse Textiles et tissus à usages techniques -- Propriétés mécaniques Thermogravimétrie Traction (mécanique) Index. décimale : 667.9 Revêtements et enduits Résumé : Multi-functional textiles have received much attention in the technical textile field for their novel functionalities available in a single substrate. Polyamide 66 (PA66), being an engineering polymer with excellent physio-mechanical properties, exhibits immense possibilities to be developed as a multifunctional textile substrate. In this work, multi-functional polyamide 66 (PA66) textiles equipped with enhanced electro-conductive, hydrophilic and flame-retardant properties were developed via in situ polymerization of pyrrole monomer onto the PA66 fabric surfaces. Meanwhile, various formulations comprised of phytic acid (PA), chitosan (CS), graphene oxide (GO) and Na-metaborate (B) along with the pyrrole also experimented with a goal to study the contribution of each compound onto the desired properties and finally, to come up with a suitable formulation. Among these formulations, only pyrrole containing formulation (i.e., PA66-PPy) demonstrated a significant improvement in all three desired functionalities, namely a noteworthy escalation in electrical conductivity (i.e., about a 43 times increase compared to the pure PA66), a semi-hydrophilic surface (i.e., water contact angle value was lowered from 124.3– 49.9°) and a substantial reduction in the peak heat release rate by 45%. Meanwhile, the formulation comprising both the pyrrole and phytic acid made the polyamide surface a super-hydrophilic one, whereas other formulations exhibited potential efficacy in attaining better flame retardancy, especially in terms of limiting oxygen index (LOI) values, vertical flame test data and char yield%. Note de contenu : - EXPERIMENTAL : - Materials - Fabric preparation - Characterization techniques - RESULTS AND DISCUSSION : - Surface morphology - Electrical conductivity - Hydrophilicity - Thermal analysis - Fire properties - Mechanical properties - Table 1 : Formulations and dry weight pickup of PA66 fabric samples - Table 2 : Electrical conductivity data of PA66 fabric samples - Table 3 : Thermogravimetric analysis data of PA66 fabric samples - Table 4 : LOI and vertical flame test data of PA66 fabric samples - Table 5 : Cone calorimetry data of PA66 fabric samples - Table 6 : Tensile properties of PA66 fabric samples DOI : https://doi.org/10.1007/s11998-023-00738-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00738-3.pdf?pdf=button Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39712 [article]

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