Coloration with nanoparticles : Scope for developing simultaneous colouring and functional properties onto textile surfaces—a short review / Chanchal Kumar Kundu in COLORATION TECHNOLOGY, Vol. 138, N° 5 (10/2022)  

[article]  inCOLORATION TECHNOLOGY > Vol. 138, N° 5 (10/2022) . - p. 443-455 Titre : Coloration with nanoparticles : Scope for developing simultaneous colouring and functional properties onto textile surfaces—a short review Type de document : texte imprimé Auteurs : Chanchal Kumar Kundu, Auteur ; Tanvir Hossen, Auteur ; Saha Rajib, Auteur Année de publication : 2022 Article en page(s) : p. 443-455 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Argent Composés inorganiques Composés organiques Matériaux -- Propriétés fonctionnelles Nanoparticules Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Increasing environmental pressures over the last few years have led to attention for non-biocide treatments in the wood protection field. The ε-caprolactone modification of wood by substitution or blocking of hydroxyl groups with hydrophobic poly(ε-caprolactone) (PCL) is one of the novel modification methods developed in recent years. In this study, ring-opening polymerization of ε-caprolactone in wood cell walls was evaluated by the 3rd and 6th re-use of recovered monomer and by oven-curing method. Spruce samples were modified by re-used ε-caprolactone and exposed to the natural weathering agents for 12 months. After weathering, the color change, surface roughness measurements, and macroscopic and ultra-microscopic observations revealed that the modified wood had better surface properties than reference wood. FT-IR analysis proved that PCL was on the weathered surface up to the 6th months, but very little amount was detected on the surfaces with a longer weathering period. The results clearly showed that the efficiency of PCL modification with re-use of the monomer solution was sufficient during the initial weathering periods, but efficiency was reduced after a prolonged exposure period. Note de contenu : - MATERIALS AND METHODS - RESULTS AND DISCUSSION : Results of tensile and tear strength - Results of colour measurements - Results of dimensional stability - Results of skew movement - Results of colourfastness to rubbing and areal density - Table 1 : Quality parameters of the yarns used in denim fabrics - Table 2 : Specifications of the denim fabric - Table 3 : Processes - Table 4 : Tests performed and standards - Table 5 : Descriptions of industrial denim washing techniques - Table 6 : Strength values of the fabrics - Table 7 : Measured CIELab values of samples - Table 8 : Colour differences between the samples of standard and reduced process methods - Table 9 : Colour fastness to rubbing and areal density of the samples - Table 10 : Water, electricity, and natural gas consumption of processes - Table 11 : Energy and environmental impacts of the process Référence de l'article : https://doi.org/10.1111/cote.12621 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12621 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38120 [article]

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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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