Robotic painting : mimicking human applicators / Karan Bansal 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. 1369-1361 Titre : Robotic painting : mimicking human applicators Type de document : texte imprimé Auteurs : Karan Bansal, Auteur ; Yayun Du, Auteur ; Eric Palan, Auteur ; Mohiuddin Quadir, Auteur ; Mohammad Khalid Jawed, Auteur Année de publication : 2023 Article en page(s) : p. 1369-1361 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couleur Dureté (matériaux) Epaisseur -- Mesure Formulation (Génie chimique) Peinture au rouleau Résistance au chocs Robotique collaborative Index. décimale : 667.9 Revêtements et enduits Résumé : Robotically assisted painting is widely used for spray and dip applications. However, use of robots for coating substrates using a roller applicator has not been systematically investigated. We showed for the first time, a generic robot arm-supported approach to painting engineering substrates using a roller with a constant force at an accurate joint step, while retaining compliance and thus safety. We optimized the robot design such that it is able to coat the substrate using a roller with a performance equivalent to that of a human applicator. To achieve this, we optimized the force, frequency of adjustment, and position control parameters of robotic design. A framework for autonomous coating is available at https://github.com/duyayun/Vision-and-force-control-automonous-painting-with-rollers; users are only required to provide the boundary coordinates of surfaces to be coated. We found that robotically- and human-painted panels showed similar trends in dry film thickness, coating hardness, flexibility, impact resistance, and microscopic properties. Color profile analysis of the coated panels showed non-significant difference in color scheme and is acceptable for architectural paints. Overall, this work shows the potential of robot-assisted coating strategy using roller applicator. This could be a viable option for hazardous area coating, high-altitude architectural paints, germs sanitization, and accelerated household applications. Note de contenu : - THEORETICAL BACKGROUND : - Automatic path planning - Passive force control using position feedback on the end-effector Materials - Coatings preparation and testing of coating properties - Color scheme - Organoleptic evaluation of coated panels was evaluated - RESULTS AND DISCUSSIONS : - Dry film thickness - Pendulum hardness - Impact resistance - Conical mandrel bent test - Color difference due to difference in painting method - Table 1 : Summary of methods and formulations - Table 2 : Color coordinates of the hand and robo-painted coatings DOI : https://doi.org/10.1007/s11998-022-00750-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00750-7.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39722 [article]

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Synthesis of phytic acid-layered zinc oxide hybrid nanoparticles and their flame-retardant applications in polyurethane coatings / Karan Bansal in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 1 (01/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 1 (01/2024) . - p. 369-382 Titre : Synthesis of phytic acid-layered zinc oxide hybrid nanoparticles and their flame-retardant applications in polyurethane coatings Type de document : texte imprimé Auteurs : Karan Bansal, Auteur ; Siavash Mansouri, Auteur ; Dilpreet Bajwa, Auteur ; Shanti Swarup, Auteur ; Mohiuddin Quadir, Auteur Année de publication : 2024 Article en page(s) : p. 369-382 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Enrobage (technologie) Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Nanoparticules -- Synthèse Oxyde de zinc Phytique, Acide Polyuréthanes Revêtements -- Additifs Revêtements -- Propriétés thermiques Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Phytic acid (PA)-coated zinc oxide (ZnO) nanoparticles were developed to produce high-efficiency flame-retarding (FR) additives for coating formulations. These hybrid (organic/inorganic) additives were fabricated using a layer-by-layer (LBL) approach to harness the FR properties of PA and ZnO on a single-platform nanoscale scaffold. These nanoparticles can be uniformly dispersed in a polyurethane (PU) coating for applications on metal substrates. The incorporation of the PA/ZnO layer-by-layer nanoparticles at 20 wt% of the polymeric resin did not adversely affect the physico-mechanical properties of the coatings. Flame-retardant properties of PU samples containing nanomaterials, showed a 50% reduction in flame spread rate than that observed from the samples prepared with only ZnO nanoparticles. Cone calorimeter studies performed on the metal panels coated with 20 wt% PA/ZnO nanoparticles-infused PU resins showed a 25% reduction in peak heat release rate and a 50% reduction in total heat release (THR) compared to control coatings prepared without nanoparticles. Scanning electron microscopy images revealed the presence of bubble-like morphologies in the burnt samples containing the nanoparticles, indicating char formation and obstruction of escaping gases produced during the burning of the coating materials. This study clearly reveals that the coatings prepared with PA/ZnO hybrid nanoparticles can protect metal substrates against fire-related damage. Note de contenu : - MATERIALS : Methods - Characterization of nanoparticles - Characterization of PU coatings on metal substrates - RESULTS AND DISCUSSION : Synthesis of PA-layered ZnO nanoparticles as functional FR nanomaterials - Nano-chemical and thermal characterization of nanoparticles - Incorporation of PA-layered ZnO nanoparticles in PU coatings and analysis of coating properties - Characterization of thermal properties of PU coatings containing PA/ZnO nanoparticles using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) - Evaluation of FR properties using cone calorimeter studies - Horizontal burning test of UL-94 samples prepared from nanoparticle-infused PU resins - Table 1 : Particle size (hydrodynamic diameter) of the nanoparticles along with PDI and zeta potential - Table 2 : Coating properties of polyurethane (PU) formulations containing ZnO nanoparticles and ZnO/PA-BL nanoparticles at different loading concentrations - Table 3 : Glass transition temperature (Tg), degradation temperature at 5% weight loss (Td5), and weight remaining of the film after exposure to 500°C of the polyurethane coatings - Table 4 : Time to ignition (TTI), peak heat release rate (pHRR), total heat release (THR), total smoke release (TSR), and flame retardancy index (FRI) of control coating and coatings containing ZnO and ZnO/PA-BL nanoparticles at 20 wt% loading concentration DOI : https://doi.org/10.1007/s11998-023-00828-w En ligne : https://drive.google.com/file/d/13XsUainuKttYmpAr5TC8PkMi_hhQEXdE/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40459 [article]

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