Recent development in new materials and coatings for superlubricity / V. L. Kakde in PAINTINDIA, Vol. LXXII, N° 3 (03/2022)  

[article]  inPAINTINDIA > Vol. LXXII, N° 3 (03/2022) . - p. 55-58 Titre : Recent development in new materials and coatings for superlubricity Type de document : texte imprimé Auteurs : V. L. Kakde, Auteur Année de publication : 2022 Article en page(s) : p. 55-58 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bisulfure de Molybdène Frottements (mécanique) Lubrification Nanoparticules Revêtement carbone diamant Tribologie (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : Superlubricity is the state in which two contacting surfaces exhibit no resistance to sliding. In coating world this type of coating play vital role that energy can be conserved by further reducing/removing friction in moving mechanical systems. The work describes an ultra-low friction phenomenon due to application of MoS2 nanoparticle coatings results in ultra-low friction coefficients in ambient atmosphere. Superlubricity reviews the latest methods and materials in this area of research that are aimed at removing friction in nano-to-micro scale machines and large scale engineering components. The additional application of solid lubricant films by powder spraying and MoS2 precipitation technologies results in low friction coefficients and a good tribological behavior under dry sliding conditions. Another unique tribological system that produces superlubricity under boundary lubrication conditions with extremely little wear. This system is a thin coating of hydrogen-free amorphous Diamond-Like-Carbon (denoted as ta-C) at 353 K in a ta¬Cita-C friction pair lubricated with pure glycerol. Note de contenu : - Survey on extremely low friction under boundary lubrication - Controlling frictional forces - Coating and lubricant in combination - Superlubricity of MoS2 and DLC - Material properties vary within a carbon triangle - DLC coating preparation - Friction of DLC/DLC in presence of glycerol and GMO En ligne : https://drive.google.com/file/d/1RUHX3KfrTELxRns6_Ml4ymdd_3ScOx4W/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37514 [article]

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Recent developments in biobased epoxy resin from natural resources and reacton kinetics : a review / V. L. Kakde in PAINTINDIA, Vol. LXIX, N° 2 (02/2019)  

[article]  inPAINTINDIA > Vol. LXIX, N° 2 (02/2019) . - p. 79-82 Titre : Recent developments in biobased epoxy resin from natural resources and reacton kinetics : a review Type de document : texte imprimé Auteurs : V. L. Kakde, Auteur Année de publication : 2019 Article en page(s) : p. 79-82 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique Biomatériaux Epoxydes Huile de karanja et constituants Huiles et graisses végétales Polymères -- Synthèse Réactions chimiques organiques Réticulation (polymérisation) Stabilité thermique Index. décimale : 667.9 Revêtements et enduits Résumé : Natural oils contains high percentage of unsaturated fatty acid and can be converted into epoxy fatty acid by epoxidation process. The Natural oil was first epoxidized using hydrogen peroxide (H202) and acetic acid. Epoxidized natural oils has emerged as an interesting concept as they obtained from sustainable, renewable natural resoui ce and are environmental friendly. For the curing purpose the epoxidized oils are also treated with a biobased acid such as citric acid (CA) and tartaric acid (TA) forming Bioepoxy CA and Bioepoxy TA. A thermogravimetric analysis revealed that thermal stability of bioepo) CA and bioepoxy TA resins were comparable with the petroleum based epoxy resins trimethylolpropane triglycidyl ethi based (P1-epoxy) and bisphenol-A diglycidyl ether based (P2-epoxy). The aim of the review is to study the kinetics of th, reaction involving d uring Epoxidation and Curing process. Note de contenu : - Vegetable oils : structure, composition, properties - Composition and properties - Reaction mechanism - Kinetics of epoxidation - Curing reaction kinetic mechanism : Gel permission chromatography (GPC) - Thermo-gravimetric analysis of bioepoxy resin - Fig. 1 : Epoxidatin side reactions - Fig. 2 : Synthesis scheme of bioepoxy resin from karanja oil En ligne : https://drive.google.com/file/d/1GrP_ibB6-XCcdh3ckMcID_PRXRz0ieML/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31956 [article]

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