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Large area, stretchable, wearable, screen-printed carbon heaters for use in elite sport / Andrew Claypole in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 1 (01/2023)
[article]
Titre : Large area, stretchable, wearable, screen-printed carbon heaters for use in elite sport Type de document : texte imprimé Auteurs : Andrew Claypole, Auteur ; James Claypole, Auteur ; Jonathan Leeder, Auteur ; Greg Stevens, Auteur ; Fiona Johnson, Auteur ; Neil Bezodis, Auteur ; Matt Parker, Auteur ; Tim Claypole, Auteur ; David Gethin, Auteur ; Liam Kilduff, Auteur Année de publication : 2023 Article en page(s) : p. 261-273 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Carbone
Chauffage électrique
Electronique imprimée
Encre
Essais (technologie)
Essais dynamiques
Films plastiques étirables
Nanoparticules
Sérigraphie
Traction (mécanique)
Vêtements de sportIndex. décimale : 667.9 Revêtements et enduits Résumé : Stretchable, nanocarbon heaters were screen-printed onto a stretchable film to create a passive heat maintenance device for elite sport. The heat uniformity and the temperature performance of these lightweight, large area electrothermal heaters were evaluated over a range of applied voltages using thermal imaging. The heaters provided a uniform heat over the 15 × 4 cm area with temperatures of 39°C, 54°C, and 72°C at 10, 15, and 20 V, respectively, within 150 s of being switched on. Tensile testing was used to examine the performance of the heaters under strain. At 20% nominal strain, the heaters gave a uniform heat output and a temperature of 44°C at 15 V, making it a promising candidate for wearable applications. The heaters were capable of maintaining temperatures of 40°C over 10 cyclic strains up to 10% nominal strain. The heaters were integrated into a proof-of-concept stretchable base-layer garment, with the effect of the heaters on skin temperature measured and thermal sensation evaluated during a simulated training session in an environmental chamber at an ambient temperature 0°C. The printed heaters maintained skin temperature and thermal sensation when compared with an unheated control. Note de contenu : - MATERIALS AND METHODS : Ink manufacture - Heater construction for electromechanical testing - Heater characterization - Cold chamber testing of proof of concept garment
- RESULTS : Heater performance - Development and testing of proof-of-concept heated garment for sprint canoeistDOI : https://doi.org/10.1007/s11998-022-00666-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00666-2.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38841
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 1 (01/2023) . - p. 261-273[article]Réservation
Réserver ce documentThe effect of plasma functionalization on the print performance and time stability of graphite nanoplatelet electrically conducting inks / Andrew Claypole in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)
[article]
Titre : The effect of plasma functionalization on the print performance and time stability of graphite nanoplatelet electrically conducting inks Type de document : texte imprimé Auteurs : Andrew Claypole, Auteur ; James Claypole, Auteur ; Tim Claypole, Auteur ; David Gethin, Auteur ; Liam Kilduff, Auteur Année de publication : 2021 Article en page(s) : p. 193-203 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Conduction électrique
Encre d'imprimerie
Encre électronique
Graphite
Nanoparticules
Rhéologie
Surfaces fonctionnelles
Technique des plasmasIndex. décimale : 667.4 Encres Résumé : Carbon-based pastes and inks are used extensively in a wide range of printed electronics because of their widespread availability, electrical conductivity and low cost. Overcoming the inherent tendency of the nano-carbon to agglomerate to form a stable dispersion is necessary if these inks are to be taken from the lab scale to industrial production. Plasma functionalization of graphite nanoplatelets (GNP) adds functional groups to their surface to improve their interaction with the polymer resin. This offers an attractive method to overcome these problems when creating next generation inks. Both dynamic and oscillatory rheology were used to evaluate the stability of inks made with different loadings of functionalized and unfunctionalized GNP in a thin resin, typical of a production ink. The rheology and the printability tests showed the same level of dispersion and electrical performance had been achieved with both functionalized and unfunctionalized GNPs. The unfunctionalized GNPs agglomerate to form larger, lower aspect particles, reducing interparticle interactions and particle–medium interactions. Over a 12-week period, the viscosity, shear thinning behavior and viscoelastic properties of the unfunctionalized GNP inks fell, with decreases in viscosity at 1.17 s−1 of 24, 30, 39% for the ϕ = 0.071, 0.098, 0.127 GNP suspensions, respectively. However, the rheological properties of the functionalized GNP suspensions remained stable as the GNPs interacted better with the polymer in the resin to create a steric barrier which prevented the GNPs from approaching close enough for van der Waals forces to be effective. Note de contenu : - Materials and ink synthesis
- Methods
- Table 1 : Composition of GNP inks, where GNP (graphite nanoplatelets, TPU (thermoplastic polyurethane resin), DAA (diacetone alcohol)
- Table 2 : Three roll millling procedureDOI : https://doi.org/10.1007/s11998-020-00414-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00414-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35363
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 1 (01/2021) . - p. 193-203[article]Réservation
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