Nano additifs : a review / Bhupesh Marathe in PAINTINDIA, Vol. LVIII, N° 7 (07/2008)

[article]  inPAINTINDIA > Vol. LVIII, N° 7 (07/2008) . - p. 113-132 Titre : Nano additifs : a review Type de document : texte imprimé Auteurs : Bhupesh Marathe, Auteur ; Abhishek Kantak, Auteur Année de publication : 2008 Article en page(s) : p. 113-132 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alumine Argent Colloides Dioxyde de titane Dispersions et suspensions Nanoparticules Or Oxyde de cérium Revêtements -- Additifs Silice La silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux. La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...). Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale. Index. décimale : 667.9 Revêtements et enduits Résumé : Nano-scale materials are said to have unique and potentially valuable properties in comparison to the same materials that exist naturally in larger than nano-scales, which can include greater tensile strength, enhanced electrical conductivity, and the ability to contribute to new chemical synthesis pathways. Nanotechnology is the science of manipulating materials at the atomic and molecular level to develop new or enhanced materials and products. One of the most advanced markets in the field of nanotechnology is in the area of modifying surface properties using nanotechnology. By using certain nanosized oxides well dispersed into the coating formulation, the mechanical properties of these coatings can be improved significantly. Especially nanosized alumina and silica is ofinterest because high-gloss, high-transparent coatings can be achieved by using nanosized fillers instead of micron-sized materials. Due to the nature of the particles, the viscosity of those dispersions is very low since there is no tendency for bridging flocculation, as for example in materials made by flame pyrolysis. When incorporating a small amount of nano alumina in a UV-curable coating system, the resistance against mechanical scratching can be increased significantly. Nano-Additives include stable colloidal suspensions of titania, ceria and alumina. These are the most technologically advanced nanomaterials available, with particle sizes less than 10 nanometers. The advantage of these Nano-Additives includes no use of surfactants, yet our colloidal suspensions remain stable. These Nano-Additives for coatings that must exhibit extraordinary ultraviolet light resistance and they have proven to help prevent marring and scratching as well. Nano silver is used as antimicrobial additive in hygienic coating application. Comb-shaped block copolymer and reduction by tertiary amine, which helps production of stable and highly concentrated pastes of Gold nanoparticles. Electronics, optics, catalysis, colorants and surface metal coatings are the possible fields of application of these gold nano particles pastes. Note de contenu : - Need of nanotechnology in coatings - Incorporation of nanoparticles in coating - NANO ADDITIVES : Nano sized alumina and silica - Synthesis of nanoparticles - Nano additive for better scratch resistance - Testing - Scratch resistance. - SURFACE MODIFIED NANOPARTICLES - NANO ADDITIVE PROPOSED THEORY : Alumina vs. silica particles - NANO ADDITIVE OF STABLE COLLOIDAL SUSPENSIONS OF NANO TITANIA, NANO CERIA AND NANO ALUMINA - NANO SILVER : ULTIMAGE BACTERIA KILLER : Fighting fungal growth with nano silver - NANO GOLD : Synthesis of production of concentrated gold nanoparticle pastes - Production of concentrated gold nanoparticle pastes - Application as colourants Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12107 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
010766	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 1 / 1)