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Building novel functionalities in coatings using supramolecular polymers / Nilesh S. Phalke in PAINTINDIA, Vol. LXIII, N° 9 (09/2013)
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Titre : Building novel functionalities in coatings using supramolecular polymers Type de document : texte imprimé Auteurs : Nilesh S. Phalke, Auteur ; Rajesh M. Shah, Auteur Année de publication : 2013 Article en page(s) : p. 53-62 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Polymères supramoléculaires Les polymères supramoléculaires sont des longues chaînes linéaires formées par assemblage réversible de composés de faible masse molaire. La réversibilité de l'association confère à ces matériaux des propriétés proches, mais complémentaires de celles des polymères classiques. En effet, dans les conditions d'utilisation, un polymère supra-moléculaire est en équilibre avec son monomère. Par conséquent, en modifiant légèrement les conditions expérimentales (solvant, concentration, température, cisaillement...), il est possible d'allonger ou de raccourcir les chaînes supramoléculaires et donc de changer les propriétés (rhéologiques, mécaniques...) du système. Cette particularité constitue un avantage pour de nombreuses applications potentielles, ainsi qu'une difficulté de caractérisation.Tags : 'Polymères supramoléculaires' 'Liaisons hydrogène' 'Revêtement auto-réparant' Hydrogels 'Composés de coordination' 'Métal-Ligand' 'Host-Guest' 'Plug n play' Index. décimale : 668.9 Polymères Résumé : Supramolecular polymers are polymeric arrays of monomer units, held together by reversible and highly directional secondary interactions — that is, noncovalent bonds, such as hydrogen bonds. The resulting materials therefore maintain their polymeric properties in solution. The directions and strengths of the interactions are precisely tuned so that the array of molecules behaves as a polymer. The high reversibility of the non-covalent bonds ensures that supramolecular polymers are always formed under conditions of thermodynamic equilibrium, and hence the lengths of the chains are directly related to the strength of the non-covalent bond, the concentration of the monomer and the temperature.
Conventional polymers have excellent properties as materials, but when they melt they become highly viscous due to the result of entanglement of their macromolecules. High temperatures and pressures are typically required to provide a melt of sufficiently low viscosity for processing, and this limits their applications. But supramolecular polymers combine good material properties with low viscosity melts that are easy to handle. Some supramolecular polymers also have remarkable characteristics unique to their class, such as the ability to self-heal the fractures in their structure as they permit a rapid response to a change in environment, resulting in easily controllable strength and selectivity of noncovalent interactions. This enables the tuning of material properties in terms of strength, reversibility and directionality which can be utilized to build novel functionalities in coatings.
In this review, an attempt is made to illustrate the classification, mechanisms and applications of the versatile chemistry of supramolecular polymers. It also focuses on important concepts such as molecular self-assembly, folding, molecular recognition, host-guest chemistry and mechanically-interlocked molecular architectures exhibited by supramolecular chemistry. Practical applications of supramolecular polymer chemistry in coatings technology such as self-healing materials, thermally responsive materials and polymer blends are also discussed.Note de contenu : - CLASSIFICATION
- SUPRAMOLECULAR POLYMERIZATION MECHANISMS : A. Isodesmic or Multi Stage oOpen Association (MSOA) - B. Ring-chain - C. Cooperative growth or nucleation-elongation - Hydrogen-bonded polymers - Metal-ligand coordination polymers - π-π stacking
- SUPRAMOLECULAR POLYMERIZATION APPROACHES
- APPLICATIONS OF SUPRAMOLECULAR POLYMERS : Self-healing applications in coatings - Oxygen barrier coatings based on supramolecular assembly of melamine - Supramolecular polymeric hydrogels - Phases separation of supramolecular and dynamic block copolymers - Polymer-coated optical sensor offers improved explosives detection - Ink-jet inks - Catalysis and artificial enzymes based on supramolecular scaffolds - Green chemistry
- FUTURE PERSPECTIVESPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19675
in PAINTINDIA > Vol. LXIII, N° 9 (09/2013) . - p. 53-62[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15622 - Périodique Bibliothèque principale Documentaires Disponible Development and characterization of alkyd emulsion and its potential usage in coatings industry for a "greener" world / Rajesh M. Shah in PAINTINDIA, Vol. LIX, N° 9 (09/2009)
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Titre : Development and characterization of alkyd emulsion and its potential usage in coatings industry for a "greener" world Type de document : texte imprimé Auteurs : Rajesh M. Shah, Auteur ; Nilesh M. Padave, Auteur Année de publication : 2009 Article en page(s) : p. 69-82 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Polyalkydes
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Green technology : Depletion of natural petroleum resources, toxicological effects on human health, restrictive environment legislation and last but not the least spiraling escalation in prices of crude oil cumulatively have increased interest in development of waterborne coatings.
For a greener world, low VOC products are imperative and in this context powder coating, high solid resins and waterborne coatings are some of the alternatives, among which waterborne coating is one of the popular alternate available today.Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6837
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Code-barres Cote Support Localisation Section Disponibilité 011733 - Périodique Bibliothèque principale Documentaires Disponible Emerging bio-based materials for surface coatings / Ashis A. Pradhan in PAINTINDIA, Vol. LXV, N° 12 (12/2015)
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Titre : Emerging bio-based materials for surface coatings Type de document : texte imprimé Auteurs : Ashis A. Pradhan, Auteur ; Rajesh M. Shah, Auteur Année de publication : 2015 Article en page(s) : p. 69-84 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biomatériaux
Biomolécules
Biopolymères
Chimie écologique
Ressources renouvelables
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : A bio-based material is a material intentionally made from substances derived from living (or once-living) organisms whereas biopolymers are macromolecules derived from plants, trees, bacteria, algae, or other sources. They are long chains of molecules linked together through a chemical bond and are usually able to perform the functions of traditional petroleum-based products. Biopolymers exist in nature as cellulose (in cotton, wood, wheat, etc.), proteins, starches, and polyesters. The potential for using these materials to make synthetic polymers was identified in the early 1900s, but they have only recently emerged as a viable material for large-scale commercial use.
While biopolymers can be made from an almost unlimited range of bio-based materials, most of the currently marketed biopolymers are made from vegetable oils and natural polymers such as cellulose & starch. Bio-based materials have the potential to produce fewer greenhouse gases, require less energy, and produce fewer toxic pollutants over their life cycle than products made from fossil fuels. They may also be recyclable or compostable depending on the biomaterial and how they have been produced.
As the cost of petroleum resources increases, making products with biobased materials is increasingly attractive. lncreased demand for agricultural and forest-based feedstocks also offers new resource-based economic development opportunities for farmers and struggling rural communities and manufacturing sectors. Moreover, societal benefits from a shift to biobased materials couId be enormous from long term sustainability point of view.Note de contenu : - CLASSIFICATION OF BIO-BASED RAW MATERIALS USED IN PAINT AND COATINGS : Vegetable oil & fatty acid based raw materials - Bio-based natural polymers - Bio-based monomers or building blocks - Bio-based solvents and additives - Para-xylène - Isopropanol - n-Butanol
- CHALLENGES : Cost - Quality & performance - Impact on the food chain
- FIGURES AND MOLECULAR STRUCTURE : Ricinolic acid and lesequerolic acid - Calendic acid and eleostearic acid - Castor acrylated monomer - Amylopectin molecule - Cellulose - Chitosan - Pullulan - Alginate - Fermentation of glucose to bio-succinic acid - Process of manufacturing of biobased styrene - Process of manufacturing of bio based methacrylic acid and methyl methacrylate - Sucrose polyester - Process of manufacturing of biobased lactic acid - Lactide to polyactic acid PLAEn ligne : https://drive.google.com/file/d/1ATQrrSdsZ2vf_knd4izqvRjdnXezXxN-/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25315
in PAINTINDIA > Vol. LXV, N° 12 (12/2015) . - p. 69-84[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17757 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Leveraging the strength of FEVE coatings Type de document : texte imprimé Auteurs : Pavan Patil, Auteur ; Rajesh M. Shah, Auteur Année de publication : 2018 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs
Anticorrosion
Copolymère fluoroéthylène-vinyléther
Fluoropolymères
Polyfluorure de vinylidène
Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : Fluoroethylene vinyl ether, commonly known as FEVE resins; are a class of fluorinated resins that can be formulated into a variety of coating systems where superior long-term durability is required. FEVE resin chemistry resists degradation by UV light providing coatings with unsurpassed exterior weatherability. FEVE resins are unique amongst fluorinated resins as they are supplied in alI the forms viz. solvent, water and powder which are typically utilized in coating industries. This flexibility allows them to be used not only in industrial applications but also in Architectural applications. For industrial applications, the powder and water-based products exhibit high performance without the high VOC's typically found in higher performance coatings. In architectural applications, FEVE based coatings showcase vibrant color palettes without degradation & fading and offer green building solutions including cool roof coatings. Note de contenu : - FLUOROPOLYMER WITH WONDERS OF FLUORINE : Properties of fluorine atom - Classification of fluoropolymers - Structure of FEVE
- FUNDAMENTAL CHEMISTRY OF FLUORO-POLYMER : Solvent borne
- TYPES OF FEVE COATINGS : Water-borne
- APLICATIONS : Fluoropolymer coatings for architectural applications - FEVE coatings as bridge topcoats - On-line coatings - Application in powder coating - FEVE-based anti-graffiti coatings
- UPCOMING TRENDS : FEVE high-solids resins as environmentally friendly coatings
- LIFE CYCLE COST ADVANTAGES OF FEVE BASED COATINGS
- FIGURES : 1. FEVE structure - 2. Polymer structure of FEVE copolymer - 3. Graphical presentation of FEVE polymer against PVDF polymers - 4. Process for preparing FEVE dispersion - 5. Fluoropolymer coatings for architectural applications - 6. FEVE coatings as bridge topcoats - 7. The skydance bridge in Oklahoma city - 8. FEVE powder coatings application on aluminium substrate - 9. Silanol functional FEVE resins - 10. Life cycle cost advantage of FEVE based coatingEn ligne : https://drive.google.com/file/d/1anJNnKXSOEDaRX-IY2e3daIZhzdU0J2m/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30323
in PAINTINDIA > Vol. LXVIII, N° 1 (01/2018)[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19766 - Périodique Bibliothèque principale Documentaires Disponible The depth and expanse of graphene to cause breathrough properties in coatings / Rajesh M. Shah in PAINTINDIA, Vol. LXX, N° 10 (10/2020)
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Titre : The depth and expanse of graphene to cause breathrough properties in coatings Type de document : texte imprimé Auteurs : Rajesh M. Shah, Auteur Année de publication : 2020 Article en page(s) : p. 55-78 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs
Anticorrosion
Composites
GraphèneLe graphène est un cristal bidimensionnel (monoplan) de carbone dont l'empilement constitue le graphite. Il a été isolé en 2004 par Andre Geim, du département de physique de l'université de Manchester, qui a reçu pour cette découverte le prix Nobel de physique en 2010 avec Konstantin Novoselov. Il peut être produit de deux manières : par extraction mécanique du graphite (graphène exfolié) dont la technique a été mise au point en 2004, ou par chauffage d'un cristal de carbure de silicium, qui permet la libération des atomes de silicium (graphène epitaxié). Record en conduction thermique jusqu'à 5300 W.m-1.K-1. C'est aussi un matériaux conducteur.
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Matériaux -- Propriétés fonctionnelles
Revêtements antisalissures
Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : Graphene has attracted significant attention because of its unique combination of extraordinary electronic, optical and mechanical properties. It was first isolated in 2004 using simple mechanical exfoliation of graphite. Graphene sheets are two-dimensional, one-atom-thick layers of sp2-bonded carbon atoms connected in a hexagonal, honey-comb-like pattern. Graphene has found applications in almost all the areas such as advanced batteries and transistors, solar cells, displays, sensors, and composites. In coatings, graphene by itself as a coating material or as an additive for improving the performance of various coating technologies is an emerging area. Graphene based coating have applications in corrosion resistant coatings, flame retardant coatings, wear/scratch resistant coatings, anti-fouling coatings, pollutant adsorption coatings, anti-septic coatings etc. ej. Besides, graphene-based corrosion protection coatings, the super- hydrophobicity of graphene has also been exploited. Also, there are many possible applications for conductive graphene coatings. Note de contenu : - GRAPHENE - CHEMICAL STRUCTURE
- TYPES OF GRAPHENE : Graphene oxide - Reduced graphene oxide (rGO) - Graphene nanoplatelets (GNPs) - Graphene oxide quantum dots - Graphene nanoribbons - Chemical modifications of graphene (graphene masterbatches)
- PROPERTIES OF GRAPHENE : Electronic properties - Mechanical properties - Thermal properties - Flexibility/elasticity - Optical properties
- APPLICATIONS OF GRAPHENE IN COATING INDUSTRY : Graphene based protective coatings / Corrosion-inhibiting coating - Graphene-based fire retardant coating - Graphene based anti-fouling coatings
- MISCELLANEOUS APPLICATIONS : Graphene sensors - Lithium reduced graphene oxide batteries - Structural composites - Graphene based composite materials - Functional inks
- Fig. 1 : Graphene hybrid 2d structure
- Fig. 2 : Graphene - Hexagonal pattern
- Fig. 3 : Graphene - Fullerone, nanotube and graphite
- Fig. 3 : Graphene molecular structure anatomic structure - 3D illustration
- Fig. 4 : Structure of pG, GO & rGO
- Fig. 5 : Graphene - Properties
- Fig. 6 : Graphene-based hygiene coatingEn ligne : https://drive.google.com/file/d/1mQU0UjbQ4kYTlhNxUJLUAS7hWx-ttb9J/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34668
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Code-barres Cote Support Localisation Section Disponibilité 22360 - Périodique Bibliothèque principale Documentaires Disponible