Coating of modified ZnO nanoparticles on cotton fabrics for enhanced functional characteristics / Muhammad Usman Munir in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 2 (03/2022) . - p. 467-475 Titre : Coating of modified ZnO nanoparticles on cotton fabrics for enhanced functional characteristics Type de document : texte imprimé Auteurs : Muhammad Usman Munir, Auteur ; Munir Ashraf, Auteur ; Hafiz Affan Abid, Auteur ; Amjed Javid, Auteur ; Shagufta Riaz, Auteur ; Haleema Khanzada, Auteur ; Abdur Rehman, Auteur ; Kashif Iqbal, Auteur Année de publication : 2022 Article en page(s) : p. 467-475 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Nanoparticules Oxyde de zinc Potentiel zeta Protection contre le rayonnement ultraviolet Réaction de couplage Surfaces fonctionnelles Textiles et tissus Index. décimale : 667.9 Revêtements et enduits Résumé : The incorporation of nanoparticles (NPs) into textile fabrics can transform ordinary products to endow the new functional characteristics owing to their interesting surface characteristics. The surface functionalization of NPs can play a key role in controlling the colloidal stability followed by interactions between substrate and NPs leading to enhanced functional characteristics. Here, the synthesis of ZnO NPs was carried out through hydrothermal method. The surface of NPs was modified using silanol and tertiary amine-based coupling agents. The functionalized NPs were characterized using zeta potential, size distribution, XRD, EDX, and FTIR. The size of prepared NPs was observed as 34 nm. The disperse stability of functionalized NPs was studied by varying the concentration of coupling agent and assessed through the ultraviolet protection factor (UPF) and antibacterial activity of the fabrics treated with functionalized NPs. The functionalized NPs exhibited stable dispersion with higher zeta potential and have a smaller size. A significant improvement in the UPF value and antibacterial activity of treated cotton fabrics was observed. Note de contenu : - EXPERIMENTAL : Preparation of ZnO NPs - Preparation of coupling agent - Modification of ZnO NPs - Application of ZnO NPs on fabric - RESULTS AND DISCUSSION : Size optimization and zeta potential of ZnO NPs - Effect of pH on zeta potential and size of modified ZnO NPs - Crystal structure of Synthesized NPs - Vibrational analysis of ZnO NPs - UV resistance of treated fabrics - Antimicrobial activity of treated fabrics - Table 1 : Description of process conditions to optimize the size of NPs - Table 2 : Description of factors to study colloidal stability of NPs DOI : https://doi.org/10.1007/s11998-021-00533-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00533-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37278 [article]

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Flexible piezoelectric coatings on textiles for energy harvesting and autonomous sensing applications : a review / Anum Rashid in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 1 (01/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 1 (01/2023) . - p. 141-172 Titre : Flexible piezoelectric coatings on textiles for energy harvesting and autonomous sensing applications : a review Type de document : texte imprimé Auteurs : Anum Rashid, Auteur ; Usman Zubair, Auteur ; Munir Ashraf, Auteur ; Amjed Javid, Auteur ; Hafiz Affan Abid, Auteur ; Saba Akram, Auteur Année de publication : 2023 Article en page(s) : p. 141-172 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alliages polymères Capteurs (technologie) Charges (matériaux) Condensateurs électriques Energie -- Récupération Energie -- Stockage Fibres métalliques Générateurs électriques Matériaux céramiques Matériaux intelligents Matériaux piézoélectriques Matériel médical Nanotechnologie Polyfluorure de vinylidène Revêtements organiques Textiles et tissus à usages techniques Index. décimale : 667.9 Revêtements et enduits Résumé : The digitization of a society has tremendously influenced the social, economic, and organizational activities of human beings. Internet of things (IoT) will be the next norm to ensure well-being, protection, and comfort of the human beings. Owing to the crisis in energy and consumption of fuel, the research in energy harvesters and autonomous sensors has been focused to develop self-powered wearable devices. The stand-alone energy devices are not suitable to fulfill the requirement of supplying power to the various wearable devices because of higher weight, large volume, frequent recharging, and replacement. The integration of wearable devices into textile materials has recently fostered the emergence of textile-based piezoelectric energy harvesters and sensors. A critical review has been presented on the current status of the textile-based piezosensors and energy harvesters, covering fundamental aspects like probable piezocoatings, fabrication strategies, material choices, working principles, theory behind piezoelectric energy harvesting devices and possible potential applications. Note de contenu : - INTRODUCTION : Historical perspective - Piezoelectric constants - TEXTILE MATERAIAL AS PIEZOELECTRIC SUBSTRATE : Comfort properties of piezotextiles - Latest trends in piezoelectric fabrics - THE CURRENT STATE OF THE ARTS OF TEXTILE-BASED PIEZOSENSORS AND ENERGY HARVESTER - PROCESS LOSSES AND LIMITATIONS DURING HARVESTING - STRATEGIES TO IMPROVE PIEZOELECTRIC PERFORMANCE - CONCEPTS AND METHODOLOGIES : PIEZOELECTRIC ENERGY HARVESTING AND SENSING - PIEZOELECTRIC COATINGS FOR TEXTILE SUBSTRATE - PIEZOELECTRIC POLYMERS : Polyvinylidene fluoride - Piezoelectric ceramics - Ferroelectret materials - Coatings based on piezoelectric polymer composites - Polymer blends - Hybrid fillers - EFFECTIVE TEXTILE COATING METHODS - METALLIC FIBERS INTERGRATION : Dip coating - Printing - Chemical solution/vapor polymerization - Physical vapor deposition - ENABLING SENSING FUNCTIONALITY IN FABRICS - SIGNIFICANCE OF TEXTILE-BASED SENSORS : PVDF-based piezoelectric sensors - Piezoelectric sensors for biomedical field - ENERGY HARVEST/STORAGE USING TEXTILE-BASED PIEZOELECTRIC TRANSDUCTION : Piezoelectric nanogenerators (PENGs) - Energy harvest using printed piezoelectric film on the textile surface - Harvested energy storage using textile supercapacitors - FUTURE TRENDS DOI : https://doi.org/10.1007/s11998-022-00690-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00690-2.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38833 [article]

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