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Microwave absorbing coating based on epoxy/ionic liquid system : A review / Uday D. Patil in PAINTINDIA, Vol. LXXIII, N° 9 (09/2023)
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Titre : Microwave absorbing coating based on epoxy/ionic liquid system : A review Type de document : texte imprimé Auteurs : Uday D. Patil, Auteur Année de publication : 2023 Article en page(s) : p. 64-74 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Diélectriques
Epoxydes
Liquides ioniques
Micro-ondes -- Absorption
Réticulants
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : This is the review on Microwave absorbing coating based on Epoxy/lonic Liquids (ILs) which is used alone and in combination with Hardeners MTHPA and MCDEA. lonic Liquid is used as a curative for Epoxy resin in this review paper but it has many more advantageous benefits over conventional curing systems e.g. used in Solvent recovery, as a Lubricant, as a Plasticizer, and as a Catalyst. Microwave radiation is a more crucial topic for today's life and getting rid of it is a challenge. So here cornes a solution lonic Liquid-based Microwave radiation absorbing coating. lonic Liquid (IL) is changing the future of the epoxy system and is also based on green chemistry which can be helpful to reduce environmental stress. Neat bmim.BF4 was able to cure epoxy resin, giving rise to networks with outstanding thermal stability compared with the systems cured with an anhydride or aromatic amine. The epoxy networks were cured with bmim.BF4 atone or in combination with an anhydride or aromatic amine were transparent and presented considerable microwave absorbing properties in the X- band frequency range (8-12 GHz), being the best performance observed for the systems cured with bmim.BF4/anhydride curing system, with reflection loss value around —16 dB at 11.3 Ghz.
In another part, the microwave-absorbing properties of 1-ethyl-3-methylimidazolium and 1- buty/-3 methylimidazolium ([E and BMlm] +- based) room-temperature ionic liquids (ILs) with different anions were systematically investigated by Fulong Yang et al. measuring dielectric properties in the 1-14 GHz microwave-frequency range. The results showed that the real part of permittivity' values decreased from 13 to 4 and the values of loss tangent decreased from 5.91 to 0.24, meaning that ILs displayed high dielectric-loss characteristics at microwave-frequency ranges. Furthermore, it was found that the conductivity loss was dominant for dielectric loss in the low-frequency band, and the polarization loss played a major role in high-frequency bands. For the same anion ILs with different cations, the permittivity became higher as the length of the alkyl chain decreased. The absorption properties of [E and BMlm] +- based ILs could be obtained based on their dielectric properties and found the ILs absorption bands were mainly concentrated in the C band and X band. It was noted that the maximum reflection loss (RL) of [BMIrn][NTf2] with a thickness of 4 mm reached — 27.6 dB at 8.73 GHz, and the bandwidth of an RL less than 10 dB could be up to 4.3 GHz. The absorption peak frequency of the ILs gradually shifted to lower frequencies with increasing temperature and coating thickness, which might be caused by the change in impedance matching.Note de contenu : - Types of ionic liquids
- Application of ionic liquid : Ionic liquids as catalytic agents - Ionic liquids as ionic conducting agents
- Ionic liquids as lubricants
- Ionic liquid with microwave absorbing coating
- Materials
- Used
- Dielectric properties
- Microwave-absorption properties
- Table 1 : General overview of ionic liquid influence on epoxy resins
- Table 2 : Change in maximum reflection losses values of RLM (dB) and peak frequency (FP of [BMIm] +- based ILs with different temperatures
- Table 3 : Details of maximum reflection losses values of RLM (dB) and peak frequency (FP) of [BMlm] +- based ILsEn ligne : https://drive.google.com/file/d/1CaE6b9g0EOPyRpiHoe_XSWnbBBjCgu3K/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40398
in PAINTINDIA > Vol. LXXIII, N° 9 (09/2023) . - p. 64-74[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24287 - Périodique Bibliothèque principale Documentaires Disponible Mineral solutions for powder coatings / Lieven Verstuyft in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 211, N° 4669 (06/2021)
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Titre : Mineral solutions for powder coatings Type de document : texte imprimé Auteurs : Lieven Verstuyft, Auteur Année de publication : 2021 Article en page(s) : p. 34-35 Langues : Anglais (eng) Catégories : Charges (matériaux)
Formulation (Génie chimique)
Revêtement poudre -- Additifs
Revêtements (produits chimiques)
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés optiques
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The autho discusses and evaluates a variety of mineral extenders for powder coatings.
Many minerals can contribute to the performance of powder coatings, but which ones result in the best outcome ? The most commonly used minerais for powder coatings are calcium carbonate (natural and precipitated CaCO3) and barium sulphate (naturel barite and synthetic grades known as Blanc Fixe). Imerys produces and supplies a whole range of inorganic minerais which differ in terms of morphology, size, oil absorption, brightness, hardness and density. A selection of these minerais has been made for the evaluation in powder coatings to verify their suitability in these coatings and potential enhancement of the performances.
Note de contenu : - Mineral selection
- Formulation and sample preparation
- Optical properties
- Mechanical properties
- Table 1 : Properties of fillers
- Table 2 : Formulations
- Table 3 : Optical properties
- Table 4 : Mechanical properties
- Table 5 : Pulverised powder propertiesEn ligne : https://drive.google.com/file/d/17cRb-feKfRM3Inqd7qAzSukWm9ByDS1x/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36767
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 211, N° 4669 (06/2021) . - p. 34-35[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23122 - Périodique Bibliothèque principale Documentaires Disponible Modeling the penetration of polymer into paper during extrusion coating / Mubarak Khlewee in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 1 (01/2022)
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Titre : Modeling the penetration of polymer into paper during extrusion coating Type de document : texte imprimé Auteurs : Mubarak Khlewee, Auteur ; Mohammed Al-Gharrawi, Auteur ; Doug Bousfield, Auteur Année de publication : 2022 Article en page(s) : p. 25-34 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Enduction
Extrusion (mécanique)
Fibres cellulosiques
Modèles mathématiques
Nanofibres
Papier -- Revêtements
Papier et carton couché
Pénétration (physique)
Polyéthylène
Revêtements organiques
ThermocinétiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : During the extrusion coating of paper or paperboard, a molten film of polymer is pressed against a paper surface to generate waterproof packaging materials. Hot-melt glues are also applied to various porous materials and paperboard to generate packaging. In both cases, the penetration of the polymer into the pore space influences the product performance and the ability of the product to be recycled at the end of life. While there is much experimental work discussing various parameters in these operations, little theoretical work has been reported. Here, a simple model based on Darcy’s law is proposed to predict the penetration of polyethylene (PE) into paper and paper that has been coated with cellulose nanofibers (CNF). Another model, based on the flow of a polymer into a pore that includes dynamic heat transfer is developed, where the viscosity is a function of temperature. Experiments were conducted where a PE film is pressed against samples and the amount of fiber recovery is characterized. The model predictions are compared to experimental results. Good agreement for different paper types, pressing times, and temperatures is obtained after a calibration factor is used. DOI : https://doi.org/10.1007/s11998-021-00487-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00487-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37142
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 1 (01/2022) . - p. 25-34[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23313 - Périodique Bibliothèque principale Documentaires Disponible Modelling the spreading of screen ink on non-porous substrates / J. M. Bradley in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 88, B4 (12/2005)
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Titre : Modelling the spreading of screen ink on non-porous substrates Type de document : texte imprimé Auteurs : J. M. Bradley, Auteur ; A. Manning, Auteur Année de publication : 2005 Article en page(s) : p. 231-236 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Encre
Energie de surface
Modélisation des dépôts liquides
Revêtements organiques
SérigraphieIndex. décimale : 667.9 Revêtements et enduits Résumé : The reduction of dot gain in half-tone printing is desirable in order to accurately reproduce designs in printed format. An important contribution to dot gain is the spreading of ink on the substrate after image formation but prior to immobilisation by curing or drying. The spreading of a typical screen ink was modelled to determine the thermodynamic processes controlling the rate of drop spreading and the timescales over which they are significant. Suggestions are offered as to the characteristics desirable in polymer substrates in order to minimise dot spreading. Note de contenu : - EXPERIMENTAL : Samples - Surface tension and surface energy measurements - Contact-angle measurement - Bulk viscosity - Modelling and error estimation
- RESULTS AND DISCUSSION : Variation in surface tension - Correlations in the dynamic spreading parameters - Implications for the control of dot gain
- Table 1 : Bulk viscosity of Uvispeed k at the temperature of contact angle relaxation measurements
- Table 2 : Surface energy and compopnents of the polymer substrates as supplied
- Table 3 : Fitted parameters for the dynamic spreading of Uvispeed kDOI : 10.1007/BF02699577 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699577.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5400
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 88, B4 (12/2005) . - p. 231-236[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003404 - Périodique Bibliothèque principale Documentaires Disponible Modification of graphene and graphene oxide and their applications in anticorrosive coatings / Jing Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)
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Titre : Modification of graphene and graphene oxide and their applications in anticorrosive coatings Type de document : texte imprimé Auteurs : Jing Li, Auteur ; Hongpeng Zheng, Auteur ; Li Liu, Auteur ; Fandi Meng, Auteur ; Yu Cui, Auteur ; Fuhui Wang, Auteur Année de publication : 2021 Article en page(s) : p. 311-331 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Epoxydes
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.
Matériaux -- Propriétés barrières
Polymères
Revêtements organiques
ZincIndex. décimale : 667.9 Revêtements et enduits Résumé : In this article, the applications and modification methods of graphene-based materials [graphene and graphene oxide (GO)] in an organic anticorrosive coating were reviewed. First, this paper introduces the application of graphene-based materials with barrier property and electrical conductivity in anticorrosive coating and then explains the protection mechanisms, respectively. In addition, this paper puts forward some problems of graphene in the anticorrosive coatings, such as how to solve the dispersion of graphene, how to improve the compatibility between graphene and the polymer matrix, and how to enhance the adhesion between the coating and metal interface. Second, this paper summarizes the reported modification methods of graphene and GO in terms of covalent and noncovalent modification. For covalent modification, the modification methods of different functional groups of GO are summarized, such as modification of epoxy group (–C(O)C–), hydroxyl group (–OH), and carboxyl group (–COOH). As for the noncovalent modification, the modification methods of graphene and GO are summarized from the three aspects of π−π interaction, hydrogen bond interaction, and electrostatic interaction, respectively. Finally, the applications of graphene-based materials in anticorrosive coatings are summarized and prospected. Note de contenu : - Graphene-based anticorrosive coatings : Application of graphene-based anticorrosive coatings - Protection mechanism of graphene-based anticorrosive coating - Problems of graphene-based fillers in anticorrosive coatings
- Modification of graphene-based materials : Covalent modification - Noncovalent modification - Comparison of modification methods
- Table 1 : Summary of covalent modification of GO
- Table 2 : Summary of noncovalent modification of graphene and GODOI : https://doi.org/10.1007/s11998-020-00435-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00435-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35597
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 2 (03/2021) . - p. 311-331[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22701 - Périodique Bibliothèque principale Documentaires Disponible Modification of styrene-acrylic emulsion by organic UV absorber in synergy with fluorine and silicon monomers for weatherable coatings / Wei Dong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)
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PermalinkMoisture curable polyurethane technology fo wood coatings / Mrunal Vaidya in PAINTINDIA, Vol. LXXI, N° 7 (07/2021)
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PermalinkMoisture-cured polyurethanes - High performance surface-tolerant economical solution for heavy duty protective coatings / Prashant Gangwar in PAINTINDIA, Vol. LXI, N° 10 (10/2011)
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PermalinkMonte carlo approach to estimating coating service lifetime during weathering / Stuart G. Croll in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 88, B3 (09/2005)
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PermalinkMorphological changes in exterior surface coatings after exposure to cyclic water submersion and ultraviolet exposure / Armin B. Burghart in COATINGS TECH, Vol. 17, N° 6 (06/2020)
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PermalinkMorphology control in water-based biorenewable binders for decorative paints / Tijs Nabuurs in SURFACE COATINGS INTERNATIONAL, Vol. 104.3 (05-06/2021)
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PermalinkMorphology-dependent optical and wetting behavior of GLAD PTFE thin films / Rajnarayan De in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)
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PermalinkMould release potential of polydimethylsiloxane coatings using photoinitiated polymerisation / David P. Dworak in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B2 (06/2006)
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PermalinkMultifunctional photoinitiators (MFPIs) : A new concept / R. Burrows in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B2 (06/2004)
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