New era of superhydrophobic coatings / Suresh Narute in PAINTINDIA, Vol. LXV, N° 6 (06/2015)  

[article]  inPAINTINDIA > Vol. LXV, N° 6 (06/2015) . - p. 65-69 Titre : New era of superhydrophobic coatings Type de document : texte imprimé Auteurs : Suresh Narute, Auteur ; Anuj Agrawal, Auteur Année de publication : 2015 Article en page(s) : p. 65-69 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Angle de contact Anticorrosion Composés organiques Energie de surface Fluor Hydrophobie Nanoparticules Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : Nowadays smart polymers, smart materials, smart coatings are getting a lot of attention in the research field. Amongst them smart coatings are the fastest developing and the most interesting technology. Smart coatings are called as "SMART'? because they respond to environmental changes in a predictable and noticeable manner. The technology discussed in this paper is "Superhydrophobic coating". This effect, was originally observed in the nature (e.g. on lotus leaves), and is important fora wide range of scientific and technological applications, like developing coatings that possess self-cleaning properties, prevention of surface fouling and anti-corrosion. Superhydrophobic surfaces are those whose water contact angle is greaterthan 150° and have low surface energy. Water droplets do not slide, but roll down the superhydrophobic surface, carrying dust along with it and thereby cleaning the surface. The corrosion protection mechanism is related, first, to the reduction of the electrolyte—metal contact area, and second, to the reduction of the corrosion current. Such coatings are also used to reduce leakage currents on the surface of silicon insulators .This paperfocuses on superhydrophobic coatings based on silicone resins, fluoro-organiccompounds and nanomaterials. Note de contenu : - MEASURING CONTACT ANGLE : Young's equation - Wenzel's equation - Cassie-Baxter's equation - FABRICATION OF SUPERHYDROPHOBIC COATINGS - APPLICATIONS : Anti-adhesion & self cleaning - Anti-icing - Anti-corrosion - Maritime industries - Power transmission lines - Textiles - CHALLENGES FACED BY SUPERHYDROPHOBIC COATINGS En ligne : https://drive.google.com/file/d/1xMcmjmbhegi4oUfjYUGHz4_2EGt9ViMA/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24463 [article]

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Sulphur limonene polysulphide, in extracting toxic metals from water and soil / Anuj Agrawal in PAINTINDIA, Vol. LXVI, N° 7 (07/2016)  

[article]  inPAINTINDIA > Vol. LXVI, N° 7 (07/2016) . - p. 54-56 Titre : Sulphur limonene polysulphide, in extracting toxic metals from water and soil Type de document : texte imprimé Auteurs : Anuj Agrawal, Auteur ; Dhawal Unune, Auteur Année de publication : 2016 Article en page(s) : p. 54-56 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Limonène mercure Métaux lourds Pollution -- Lutte contre Polymères Sols -- Décontamination Soufre Soufre-limonène polysulfure Index. décimale : 667.9 Revêtements et enduits Résumé : The toxic effects of mercury and other heavy metals present in the environment are well known and thus many efforts are being put forward to reduce their levels. One such technology that has come up involves using a material, Sulphur Limonene Polysulphide (SLP) which has the capacity to reduce the metal content upto 55%. It is a polymer that is prepared using sulphur and limonene which are the by products of oil refinery and citric juice industries respectively. This makes the technology comparatively of a lower cost, and also easy to commercialize based on the abundance of the raw materials required. The polymer synthesized can be used as a coating or a solid device that adsorbs the heavy metals from its surroundings, which further penetrates inside the surface of polysulphide, likely due to its malleable nature and high density of mercury. Another distinct feature of this polymer is that it changes colour from red to yellow as it adsorbs mercury, which gives a qualitative idea of when the device is saturated and needs to be replaced. Also a study was done which showed that SLP does not release any harmful materials into the environment, thus making it an efficient and commercial technology to extract the toxic metals in the environment. En ligne : https://drive.google.com/file/d/12F_5w9oJeJhXOBojoByFEl_yj7eroxKq/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26856 [article]

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