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PAINTINDIA . Vol. LXIX, N° 2Mention de date : 02/2019Paru le : 15/02/2019 |
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Ajouter le résultat dans votre panierSmart coating with microencapsulation technology / Meghana Rajaram Rode in PAINTINDIA, Vol. LXIX, N° 2 (02/2019)
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Titre : Smart coating with microencapsulation technology Type de document : texte imprimé Auteurs : Meghana Rajaram Rode, Auteur Année de publication : 2019 Article en page(s) : p. 53-67 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Amines Une amine est un composé organique dérivé de l'ammoniac dont certains hydrogènes ont été remplacés par un groupement carboné. Si l'un des carbones liés à l'atome d'azote fait partie d'un groupement carbonyle, la molécule appartient à la famille des amides. Découvertes en 1849, par Wurtz les amines furent initialement appelées alcaloïdes artificiels.
On parle d'amine primaire, secondaire ou tertiaire selon que l'on a un, deux ou trois hydrogènes substitués.
Par exemple, la triméthylamine est une amine tertiaire, de formule N(CH3)3.
Typiquement, les amines sont obtenues par alkylation d'amines de rang inférieur. En alkylant l'ammoniac, on obtient des amines primaires, qui peuvent être alkylées en amines secondaires puis amines tertiaires. L'alkylation de ces dernières permet d'obtenir des sels d'ammonium quaternaire.
D'autre méthodes existent : 1. Les amines primaires peuvent être obtenues par réduction d'un groupement azoture, 2. Les amines peuvent aussi être obtenues par la réduction d'un amide, à l'aide d'un hydrure, 3. L'amination réductrice permet l'obtention d'amines substituées à partir de composés carbonylés (aldéhydes ou cétones), 4. Les amines primaires peuvent être obtenues par la réaction de Gabriel.
Anticorrosifs
Anticorrosion
Encapsulation
Epoxydes
Formulation (Génie chimique)
Matériaux intelligents
Microémulsions
Polyisocyanates
Polymères à terminaison amine
RevêtementsIndex. décimale : 667.9 Revêtements et enduits Résumé : While there are various types of smart coating available, this paper is based on smart coating with pH-triggered release microcapsules which is one of the advanced techniques in coating system. These microcapsules can be incorporated into various coating systems for corrosion detection, protection and self-repair of mechanical coating damage. This paper will present the results from progress made to date in the controlled release properties of these microcapsules as well as in their corrosion indication and corrosion inhibition function. This paper covers the recent progress made in the encapsulation process, the characterization of these microcapsules as well as results showing the controlled release function & different techniques used for microencapsulation & its applications. Note de contenu : - INTRODUCTION : Structure of microcapsules - Core - Shell - Morphology of microcapsules
- PAINT FORMULATION WITH MICROENCAPSULATION : Compatibility study between paint formulation and the microcapsules - Solvents compatibility test - Formulation stability test - Microcapsules effect on coating adhesion - Paint formula and coating process effect on microcapsules - Microencapsulation process
- Oil - in - water microemulsion process - Water - in - oil microemulsion process
- ENHANCING COATING FUNCTIONALITIES WITH MICROCAPSULES
- COMMONLY USED COAT MATERIALS IN MICROENCAPSULATION : Coating material properties
- APPLICATIONS OF MICROENCAPSULATION TECHNOLOGY IN COATING SYSTEM : Corrosion control in coating - Self-healing coating based on microcapsules - Novel responsive surfaces based on active hybrid coatings utilizing encapsulation technologies - Encapsulated antifreeze agent for anti-ice coatings - Self-healing concrete with a microencapsulated healing agent
- CONTROLLED RELEASE OF THE MICROCAPSULES : pH controlled release properties of the microcapsules - Controlled release of microcapsule content at the onset of corrosion
- Fig. 1a : Schematic of microcapsule
- Fig. 1b : Shell categories
- Fig. 2 : Morphology of microcapsule
- Fig. 3 : PATTI adhesion test results of various commercial paint systems
- Fig. 4a : Microcapsules appear dispersed and stable inside the epoxy amine coating
- Fig. 4b : Color change observed when microcapsules in dry paint were exposed to basic pH conditions
- Fig. 5a : Steps involved in the interfacial polymerization of oil-in- water microemulsion process for making oil core microcapsules (oil is shown in yellow and water in blue)
- Fig. 5b : Steps involved in the interfacial polymerization of water-in-oil microemulsion process for water core microcapsules. Oil is shown in yellow and water in blue
- Fig. 6 : Schematic diagram showing pathways for microcapsule incorporation into coating
- Fig. 7 : The central component of the smart coating system : pH sensitive microcapsules which break down under basic pH conditions
- Fig. 8 : Smart coating with pH sensitive microcapsules for corrosion detection and protection application
- Fig. 9 : End-blocking of isocyanate groups for hindered reactivity of IPDI
- Fig. 10 : Time lapse pictures of microcapsules breaking down under basic pH
- Fig. 11 : A galvanic corrosion test cell consisting of a carbon steel disc in contact with copper tape was set up and immersed in gel with microcapsules containing a corrosion indicator. As the carbon steel corodes, the encapsulated corrosion indicator is released and its color change to purple shows the initiation and progress of corrosion
- Table 1 : Compatibility of microcapsules with commercial resins formulations
- Table 2 : Commonly used coat materials in microencapsulation
- Table 3 : Concentration of cerium released from microcapsules in pH 7 and 14 solutions over timeEn ligne : https://drive.google.com/file/d/1ytdqxFE9xYJh9bfOXGQ04xoC4lCuNUxI/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31953
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Code-barres Cote Support Localisation Section Disponibilité 20676 - Périodique Bibliothèque principale Documentaires Disponible Reuse and recycling of automotive paint sludge : a brief overview / Jitendra Madhukar pawar in PAINTINDIA, Vol. LXIX, N° 2 (02/2019)
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Titre : Reuse and recycling of automotive paint sludge : a brief overview Type de document : texte imprimé Auteurs : Jitendra Madhukar pawar, Auteur Année de publication : 2019 Article en page(s) : p. 68-73 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture
Boues résiduaires
Construction -- Matériaux
Mastics
Peinture -- Recyclage
PyrolyseLa pyrolyse est la décomposition ou thermolyse d'un composé organique par la chaleur pour obtenir d'autres produits (gaz et matière) qu'il ne contenait pas. L'opération est réalisée en l'absence d'oxygène ou en atmosphère pauvre en oxygène pour éviter l'oxydation et la combustion (L’opération ne produit donc pas de flamme). Il s'agit du premier stade de transformation thermique après la déshydratation.
Elle permet généralement d'obtenir un solide carboné, une huile et un gaz. Elle débute à un niveau de température relativement bas (à partir de 200 °C) et se poursuit jusqu'à 1 000 °C environ. Selon la température, la proportion des trois composés résultants est différente.Index. décimale : 667.6 Peintures Résumé : The application of solvent-based paints and water-based paints by spraying is extensively used in the automotive industry both to protect metallic parts and to provide a desirable aesthetic appearance for the vehicle. This operation is a significant source of solid waste (paint sludge), liquid waste (booth water) and, when solvent-based paints are used, also volatile organic compounds (VOCs). Paint sludge represents an important problem both from a managerial and from an environmental point of view owing to its huge volumes and hazardous characteristics. This paper aims to provide an overview of the processes developed over the last twenty years to treat automotive paint siudge in order to recover useful products from the waste or reuse it in the industry of sealants, paints and building materials. Note de contenu : - Pyrolytic processes for the production of useful materials : Reaction of pyrolysis process
- Deployment of the paint sludge in the sealant industry
- Use of paint sludge in producing building materials
- Conversion of paint sludge into a reusable
- Fig. 1 : Schematic diagram of the pyrolysis process
- Fig. 2 : Heat-curable sealants
- Fig. 3 : Caulking sealants
- Fig. 4 : Automotive paintable seam sealers
- Fig. 5 : Cement, concrete & mortars (building materials)
- Fig. 6 : Flow diagram of paint sludge to produced homogeneous mixture
- Fig. 7 : Pulverization machine to produced fine & filtered paint from homogeneous mixture of paintEn ligne : https://drive.google.com/file/d/16GUKbXle_bFVfTXrLX-Q3EDRY_kJndbb/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31954
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Code-barres Cote Support Localisation Section Disponibilité 20676 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Photo-catalytic & photo-voltaic paint - a review Type de document : texte imprimé Année de publication : 2019 Article en page(s) : p. 74-78 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Atmosphère -- Pollution -- Lutte contre
Conversion photovoltaïque
Dépolluants
Miniémulsions
Photocatalyse
Photopiles
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : Solar energy is one of the few renewable energy available. Among the solar photoreactions, photo-catalysis is the most widely studied and solar photovoltaic (PV) are the fastest-growing energy technology in the world today, where, an efficient and cost optimizing technologies are required for the removal of air pol lutant and generation of electricity. In th is review paper, we are focusing on abatement of various air pol lutants by photo-catalytic paint technique. We are also discussing an Photovoltaic Paint (N POPV) System for generation of electricity and both this techniques are dependent on natural resource "Sunlight". In addition, the future re-search directions were also presented in this paper. Note de contenu : - Why photo-catalysis
- Mechaninm of PCO reaction
- How it works
- Synthesis of NPs via the miniemulsion process
- Synthesis of NPs via precipitation methods
- Fig. 1 : Suggested mechanisms for photocatalytic reaction of TiO2 at the valence and conduction band
- Fig. 2: Presents the schematic of photocatalytic oxidation using TiO2 as the photo-catalyst During the photocatalytic oxidation, the most important step of photo-reaction is the formation of hole electron pairs which need energy to overcome the band gap between the valence band (VB) and conduction band (CB). hen the photon energy is equal to or exceeded the band gap energy Eg, the electron-hole pairs are created in the semiconductor, dissociating into free photoelectrons in the conduction band and photo-holes in the valence band respectively
- Fig. 3 : Schematic showing NOx removal proces
- Fig. 4 : Solar cell
- Fig. 5 : Schematic of the NP synthesis processEn ligne : https://drive.google.com/file/d/1ClqtgjTXlD1Slx50t6O3zQAFTlX749YZ/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31955
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Code-barres Cote Support Localisation Section Disponibilité 20676 - Périodique Bibliothèque principale Documentaires Disponible 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)
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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 thermiqueIndex. 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 oilEn ligne : https://drive.google.com/file/d/1GrP_ibB6-XCcdh3ckMcID_PRXRz0ieML/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31956
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Code-barres Cote Support Localisation Section Disponibilité 20676 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Paint bases Type de document : texte imprimé Auteurs : M. Veeramani, Auteur Année de publication : 2019 Article en page(s) : p. 96-98 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Revêtements -- Coloration:Peinture -- Coloration
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.6 Peintures Résumé : Base is one of the major components of paint. Base is a sol id substance in a fine state that forms the body of paint. It forms the bulk of paint. It conveys the character of the paint. Base makes the film of the paint, opaque, harder, and elastic and prevents formation of shrinkage cracks. I had discussed in the previous chapter the basic principles of Bases so that the readers can understand them before proceeding further. It is very essential to keep in mind that Bases are invariably white without any tinting done as it is being readied for post tinting as per customer requirements rather than maki ng it as a ready colour/shade which will only add to the inventory. The base number included on paint will refer to the different base paints that can be used to start the process of mixing the desired colour to obtain the final shade. It is the foundation that other colours are added to. Base numbers refer to the paint used to tint, or change the colour of, the paint. Typically, the higher the base number, the darker the colour of tinting paints. A base is a paint medium specifically manufactured for mixing colours. Typically, base 1 is for pastels, 2 for slightly darker, on to base 4 which is used for intense darker colours. Aside from different formulations for each base, base 4 al lows more room in the can for the addition of tinting colours than base 1. The reason one can fi nd so little information on the bases is simple — they are not meant to be sold "as-is", as they are used to formulate a chosen colour. Further, if you mixa colour in base 1 and use the same formula in any other base, one will not get the same colour. This principle has to be always borne in mind. Note de contenu : - Advantages of post tinting system
- Inplant tinting difficulties
- Point of sales tinting
- Composition of basesEn ligne : https://drive.google.com/file/d/1fJcpy14BCJaj_iZjzI11cA0A2HD2KzEb/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31957
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Code-barres Cote Support Localisation Section Disponibilité 20676 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Colour index generic names of pigments Type de document : texte imprimé Auteurs : Mukund Hulyalkar, Auteur Année de publication : 2019 Article en page(s) : p. 100-102 Langues : Anglais (eng) Catégories : Pigments
Produits chimiques -- NomenclatureIndex. décimale : 667.2 Colorants et pigments Résumé : The generic names are the very commonly referred pigments of different chemical types. Generic name become handy to classify pigment chemical types.
The colour index generic name of the pigment indicates the 'Hue' of the pigment and the serial order in which the pigment chemical type has been registered with colour index authorities.
Assignment of generic name and number to the pigment depends upon its 'Hue' and the order in which the pigment chemical type has been registered with colour index.
En ligne : https://drive.google.com/file/d/1kisOQshzeDslKtvK8CUtUbg0k28g52hZ/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31958
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Code-barres Cote Support Localisation Section Disponibilité 20676 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Synthetic enamels - VI Type de document : texte imprimé Auteurs : Mukund Hulyalkar, Auteur Année de publication : 2019 Article en page(s) : p. 104 Langues : Anglais (eng) Catégories : Formulation (Génie chimique)
Revêtement émail:Peinture-émailIndex. décimale : 667.9 Revêtements et enduits Note de contenu : - Rules of enamel manufacturing
- 1. Product quality
- 2. Pigmentation (%) and ratio
- 3. Combination of pigments
- 4. Choice of pigments
- 5. Addition of extenders
- 6. Selection of wetting and dispersing additive
- 7. % of wetting and dispersing additive
- 8. Choice of anti-settling additive
- 9. Selection of grinding machinery
- 10. Selection of resinEn ligne : https://drive.google.com/file/d/1DeylKaF9c0JHcTrW2zNNu4Mp-CBNvdrS/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31959
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