Advancements in coatings industry to improve interior air quality / Gagandeep Khanuja in PAINTINDIA, Vol. LXVI, N° 5 (05/2016)  

[article]  inPAINTINDIA > Vol. LXVI, N° 5 (05/2016) . - p. 51-60 Titre : Advancements in coatings industry to improve interior air quality Type de document : texte imprimé Auteurs : Gagandeep Khanuja, Auteur ; Avishi Agarwal, Auteur Année de publication : 2016 Article en page(s) : p. 51-60 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Air intérieur Antimicrobiens Atmosphère -- Pollution -- Lutte contre Composés organiques volatils Encapsulation Formaldéhyde -- Elimination Peinture ionique Photocatalyse Réduction des composés organiques volatils Revêtements -- Additifs:Peinture -- Additifs Revêtements -- Industrie -- Aspect de l'environnement:Peinture -- Industrie -- Aspect de l'environnement Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : In this paper, a review of the present status of the research and technological Advancements in the field of Coating industry to improve interior air quality is attempted. Indoor air quality, including that of dwellings, has become a question of environmental health in the same way as has happened with control of outdoor air quality and exposure at work. The adverse effects due to poor air quality in closed spaces affect a considerable number of people, since it has been shown that urban dwellers spend between 58 and 78% of their time in an indoor environment which is contaminated and so there is an urgent need to improvise upon the indoor air and thus enhance its quality. ln the following review, various advancements in coating industry to improve interior air quality are discussed in detail. The paper describes about the major contaminants of the indoor air pollution and how they affect the environment adversely. What are VOCs and how their emissions can be minimised to improve the interior air quality is also discussed. In addition to reduction of the emissions of VOCs special attention is paid to the technological advancennents such as formaldehyde abatement technology, encapsulation technology, ionic paint additive technology, anti-bacterial coatings, smoke and odor elimination coatings, air flow waterbome coatings, photocatalyst coating that remove and nninimize the already present indoorair contaminants and improve the interior air quality. Note de contenu : - Interior air quality - Causes of IAS problem - Major contaminants - Characteristic chemical pollutants - Effects of poor IAQ - Sick building syndrome (SBS) - Building related illness (BRI) - Multiple chemical sensitivity (MCS) - Advancements in coating industry to reduce the VOC emission from the coating industsry - The methods for reduction of VOC in the coating industry - Advancements in coating industry to reduce the presence of formaldehyde in the air - Advancements in coating industry through encapsulation (core & shell) technology - Advancements in coating industry for smoke and odour elimination - Advancements in coating industry to reduce mvoc(microbial volatile organic compounds) - Advancements in antibacterial/antimicrobial coatings - Advancements in coating industry through photocatalyst oxidation technology - Strong oxidation - Super hydrophobicity - Photocatalyst harmful degradation En ligne : https://drive.google.com/file/d/14Mg26NSn6i8KRSzY-mznDTxK0XhAxM5H/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26843 [article]

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Superhydrophobic coatings. A review / Sankalp Srivastava in PAINTINDIA, Vol. LXVI, N° 3 (03/2016)  

[article]  inPAINTINDIA > Vol. LXVI, N° 3 (03/2016) . - p. 51-58 Titre : Superhydrophobic coatings. A review Type de document : texte imprimé Auteurs : Sankalp Srivastava, Auteur ; Gagandeep Khanuja, Auteur Année de publication : 2016 Article en page(s) : p. 51-58 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Aérogels Angle de contact Cellulose La cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules. Chimie des surfaces Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Dépôt chimique en phase vapeur Greffage (chimie) Hydrophobie lasers Nanoparticules -- Synthèse Polymères Revêtements Revêtements -- Détérioration Rhéologie 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. Surfaces (technologie) Technique des plasmas Textiles et tissus Thermogravimétrie Index. décimale : 667.9 Revêtements et enduits Résumé : Wetting of a solid surface by a liquid plays an important role in several phenomena and applications. Wetting of rough surfaces has attracted great scientific interest in recent decades. Superhydrophobic surfaces, which possess extraordinary water repelling properties due to their low surface energy and specific nanometer and micrometer scale roughness, are of particular interest due to the great variety of potential applications ranging from self-cleaning surfaces to microfluidic devices. In recent years, the potential of superhydrophobic cellulose-based materials in the function of smart devices and functional clothing has been recognized, and in the past few years cellulose-based materials have established themselves among the most frequently used substrates for superhydrophobic coatings. In the following review, different approaches to synthesize superhydrophobic coatings of silica and cellulose are discussed in detail. Procedures to manufacture superhydrophobic coatings on cotton textiles have also been discussed. In addition to the anti-wetting properties of the coatings, particular attention is paid to the cause for Hydrophobicity, methods to enhance hydrophobie nature of a surface and other incorporated characteristics such as self-cleaning property, Lotus Effect etc. Potential applications for the superhydrophobic materials range from water- and stain-repellent, self-cleaning and breathable clothing to cheap and disposable Zab-on-a-chip devices made from renewable sources with reduced material consumption. Greatest use of superhydrophobic coatings is to manufacture surgical tools, medical equipments and corrosion resistant surfaces. Note de contenu : - QUANTITATIVE DEFINITION - FACTORS RESPONSIBLE FOR WETTING OF MATERIAL SURFACE - THE LOTUS EFFECT - ATTAINING SUPERHYDROPHOBICITY - HYDROPHOBIC SILICA - STRUCTURE - SYNTHESIS OF SILICA PARTICLES - PROCESSING OF SILICA : Hydrophobic fumed silica - hydrophobic precipitated silica - Hydrophobic plasma polymer coated silica - Aerosol assisted self-assembly - PROPERTIES - APPLICATIONS : Treated aggregated fumed silica - Rheology control - Synthesis of silica aerogels - CELLULOSE BASED SUPERHYDROPHOBIC COATINGS - CHEMICAL GRAFTING - CHEMICAL VAPOUR DEPOSITION : 1. Laser assisted chemical vapour deposition - 2. Plasma assisted chemical vapour deposition - (III) DEPOSITION OF NANO PARTICLES ON CELLULOSIC SURFACE - (IV) CELLULOSE COMPOSITES - PREPARATION OF SUPERHYDROPHOBIC COATINGS ON COTTON TEXTILES - EXPERIMENTAL PROCEDURE : Materials required - Preparation of amino-functionalized SiO2 - Preparation of superhydrophobic surfaces - Characterization - Observations - Thermogravimetric analysis - AGEING AND DEGRADATION OF SUPERHYDROPHOBIC COATINGS En ligne : https://drive.google.com/file/d/11__rutPQIk5wHNpjj8pziTji37ZJdVYE/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26233 [article]

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