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Assessment of lignin as a carbon source in intumescent coatings containing polyaniline / A. F. Baldissera in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)
[article]
Titre : Assessment of lignin as a carbon source in intumescent coatings containing polyaniline Type de document : texte imprimé Auteurs : A. F. Baldissera, Auteur ; M. R. Silveira, Auteur ; A. C. Dornelles, Auteur ; C. A. Ferreira, Auteur Année de publication : 2020 Article en page(s) : p. 1297–1307 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Enrobage (technologie)
Essais d'adhésion
Essais de comportement au feu
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Intumescence (chimie)
LignineLa lignine est un des principaux composants du bois, avec la cellulose, l'hémicellulose et des matières extractibles. La lignine est présente principalement dans les plantes vasculaires et dans quelques algues. Ses principales fonctions sont d'apporter de la rigidité, une imperméabilité à l'eau et une grande résistance à la décomposition. Toutes les plantes vasculaires, ligneuses et herbacées, fabriquent de la lignine. Quantitativement, la teneur en lignine est de 3 à 5 % dans les feuilles, 5 à 20 % dans les tiges herbacées, 15 à 35 % dans les tiges ligneuses. Elle est moindre pour les plantes annuelles que pour les vivaces, elle est maximum chez les arbres. La lignine est principalement localisée entre les cellules (voir parois pectocellulosiques), mais on en trouve une quantité significative à l'intérieur même de celles-ci. Bien que la lignine soit un réseau tridimensionnel hydrophobe complexe, l'unité de base se résume essentiellement à une unité de phénylpropane. La lignine est le deuxième biopolymère renouvelable le plus abondant sur la Terre, après la cellulose, et, à elles deux, elles cumulent plus de 70 % de la biomasse totale. C'est pourquoi elle fait l'objet de recherches en vue de valorisations autres que ses utilisations actuelles en bois d'œuvre et en combustible.
Voie de biosynthèse : La lignine est une molécule dont le précurseur est la phénylalanine. Cet acide aminé va subir une cascade de réactions faisant intervenir une dizaine de familles d'enzymes différentes afin de former des monolignols. Ces enzymes sont : phénylalanine ammonia-lyase (PAL), cinnamate 4-hydroxylase (C4H), 4-coumarate:CoA ligase (4CL), hydroxycinnamoyl-CoA shikimate/quinate hydroxycinnamoyl transferase (HCT), p-coumarate 3-hydroxylase (C3H), caffeoyl-CoA o-methyltransferase (CCoAOMT), cinnamoyl-CoA reductase (CCR), ferrulate 5-hydroxylase (F5H), caffeic acid O-methyltransferase (COMT) et cinnamyl alcohol deshydrogenase (CAD). Dans un certain nombre de cas, des aldéhydes peuvent également être incorporés dans le polymère.
Polyaniline
Revêtements organiques
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : Lignin, a vegetable compound, is the second most abundant biorenewable and biodegradable polymer in nature. In this study, the addition of this compound to paints containing ammonium polyphosphate (APP) and expandable graphite as pigments was investigated to improve the fire protection performance of intumescent coatings. The combination of lignin with polyaniline (PANI) in the formulations was also evaluated, as previous studies have shown that PANI-based paints show promising results in intumescent coatings. For this purpose, the thermal protection of mild steel samples coated with these organic coatings was evaluated during a fire resistance test, with the sample exposed to a Bunsen torch. During the test, temperature data and thermography images for the steel surface were collected. The coatings were also evaluated by thermogravimetric analysis and microscale combustion calorimetry. It was found that all coatings formulated provided good fire protection to the steel substrate and the lignin could be a good option to replace nonrenewable sources in intumescent paints, since the sample coated with the paint containing 10 wt% lignin reached 230°C after 30 min of assay. In addition, when this compound was used in combination with PANI, the flame protection was even better. The best performance was observed for the paint formulated with combination of 10 wt% lignin and 10 wt% PANI-ES, whose metal substrate temperature was 170°C after 30 min of assay. Note de contenu : - EXPERIMENTAL : Synthesis of PANI-ES - Preparation of paints - Sample preparation - Fire resistance test - Characterization
- RESULTS AND DISCUSSION : Adherence test - Thermogravimetric analysis - Fire resistance test - Digital optical microscopy - SEM–EDS - Microscale combustion calorimeter (MCC)DOI : https://doi.org/10.1007/s11998-020-00348-x En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00348-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34575
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 5 (09/2020) . - p. 1297–1307[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22303 - Périodique Bibliothèque principale Documentaires Disponible Assessment of relative reactivities and kinetics of various polyamine and polyamide hardeners with epoxy resins for designing high performance epoxy coatings using differential scanning calorimetry / Girish Mirchandani in PAINTINDIA, Vol. LVII, N° 6 (06/2007)
[article]
Titre : Assessment of relative reactivities and kinetics of various polyamine and polyamide hardeners with epoxy resins for designing high performance epoxy coatings using differential scanning calorimetry Type de document : texte imprimé Auteurs : Girish Mirchandani, Auteur Année de publication : 2007 Article en page(s) : p. 69-92 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique
Calorimétrie
Epoxydes
PolyamidesUn polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine.
Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères.
Polyamines
Réticulants
Réticulation (polymérisation)
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : High performance epoxy coatings have to be designed correctly in order to give corrosion protection in hostile environmental conditions. There needs to be a scientific method to accurately determine the reactivity of complex hardeners or a mixture of different hardeners in order to compare them with existing systems and select the correct curing agent for a given epoxy resin. While it may be easy to predict the reactivity of simple hardeners (short chain polyamines) of known chemical structures, the same is not possible for proprietary hardeners of unknown structures. The selection of hardener on the basis of amine value and certain theoretical rules is a misnomer and actual working conditions such as steric hindrance and catalytic effects need to be taken into account. The aim of this paper is to investigate and quantify the relative reactivities of different hardeners and study the curing kinetics of two-component epoxy coatings. Various kinetic parameters (activation energy E, pre-exponential factor A, order of reaction n and rate constant k) have been determined. The kinetic parameters help us to understand the reaction at a molecular level. The differential scanning calorimeter (DSC) was used to determine these parameters. The study has been used to investigate the effect of the amine molecular structure on the reactivity with epoxy resin. The epoxy resin used was diglycidyl ether of bisphenol A (DGEBA) having an EEW of 187 g/equ. Four different curing agents; an aliphatic, cycloaliphatic and aromatic polyamine along with a polyamide (based on dimer fatty acid and polyamine) have been selected for the study. Using kinetic modeling, the reaction mechanism was determined and found to be dependent on molecular mobility, steric hindrance and phase heterogeneity of reactants and cured network. The reaction mechanism changes from autocatalytic for the DGEBA-polyamine system to non-catalytic for the DGEBA-polyamide system. The kinetic model helps us to predict the extent of reaction as a function of time at any temperature. The techniques presented in this paper can be used to design better corrosion resistant coating systems. Note de contenu : - Dynamic experiments
- Isothermal experiments
- Relative reactivity of the hardeners (from isothermal experiments)
- Reaction mechanism (from isothermal experiments)
- Kinetic modeling (to verify autocatalytic and non-catalytic reaction mechanism)
- Kinetic parameters : order of reaction (n et m) and rate constant k
- Activation energy (E) and frequency factor (A)
- Prediction of gel time at any temperature (through kinetic modeling)
- Calculation of optimum curing agent concentration by DSCPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11478
in PAINTINDIA > Vol. LVII, N° 6 (06/2007) . - p. 69-92[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008400 - Périodique Bibliothèque principale Documentaires Disponible Atomising paint effectively using nitrogen in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 7, N° 2 (2014)
[article]
Titre : Atomising paint effectively using nitrogen Type de document : texte imprimé Année de publication : 2014 Article en page(s) : p. 8-9 Langues : Anglais (eng) Catégories : Azote
Dépôt par pulvérisation
Revêtements:Peinture
Système de pulvérisation (technologie)Index. décimale : 667.9 Revêtements et enduits Résumé : The positive results of atomising paint with nitrogen have already been demonstrated, as the process has been used in a range of different volume production applications. Major savings can be made in particular by adjusting the process parameters to meet individual requirements. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21905
in INTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 7, N° 2 (2014) . - p. 8-9[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16451 - Périodique Bibliothèque principale Documentaires Disponible Automated coating process for heavy components in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 8, N° 1 (2015)
[article]
Titre : Automated coating process for heavy components Type de document : texte imprimé Année de publication : 2015 Article en page(s) : p. 20-21 Langues : Anglais (eng) Catégories : Ateliers de peinture industrielle
Automatisation
Revêtement -- Séchage:Peinture -- Séchage
Revêtements:Peinture
Robots industriels
Système de pulvérisation (technologie)Index. décimale : 667.9 Revêtements et enduits Résumé : Paint shop for garden umbrella bases - A manufacturer of garden umbrella bases in Grefrath in Germany needed to coat parts weighing up to 160 kilograms. When the company invested in modernising its production system, it opted for a customised, fully automatic handling and coating concept to make its heavy components easier to manage. Note de contenu : - Loading system designed for specific components
- Customised drying and handling process
- Automatic parts tracking system
- Manually loading and unloading specially shaped partsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23767
in INTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 8, N° 1 (2015) . - p. 20-21[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17113 - Périodique Bibliothèque principale Documentaires Disponible Automation in coatings production / Klaus-W. West / Hannover [Germany] : Vincentz Network GmbH & Co. (2020)
Titre : Automation in coatings production Type de document : texte imprimé Auteurs : Klaus-W. West, Auteur ; Christoph Fleischer-Trebes, Auteur ; Natalie Schwerdtfeger, Auteur ; Hans-Joachim Jacob, Auteur ; Peter van den Berg, Auteur Editeur : Hannover [Germany] : Vincentz Network GmbH & Co. Année de publication : 2020 ISBN/ISSN/EAN : 978-3-7486-0259-0 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Automatisation
Production
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : While the automation of processes in many areas ensures higher efficiency and safety, the question arises how this affects the coatings industry. This eBook shows what is already automatable and how the coatings industry can learn from other branches of industry to help make the working days more efficient and future-ready. Peter van den Berg and his team have already embraced this aspect of automation by using not only a 3D printer to make disposable applicators but also a robotic interface to automate the inspection process in the paint production and so substantially reduce its carbon footprint. Klaus West examines whether digitization and simultaneous automation in the chemical and pharmaceutical industries jeopardize jobs, how these are changing and what skills we will need to acquire today to safeguard future careers. All in all, this eBook is a compilation of different, trend-setting articles regarding e. g. the important role of planning in the development of new paint-making systems, a consistent product quality in a fully automated, continous coating production or process adjustments in dispersing pigments and fillers. Note de contenu : - 1. DIGITAL TRANSFORMATION AND WORK - EXPERIENCES FROM THE CHEMICAL INDUSTRY : 1.1. Disruptive processes or gradual adjustments ? - 1.2. The chemical industry : delayed digital change - 1.3. Digitisation of work - 1.4. Social partnership in the digital economy
- 2. MODULAR PLANTS – FLEXIBLE PRODUCTION BY INNOVATIVE PLANT DESIGN : 2.1. Introduction - 2.2. Definitions and levels of modularization in the chemical industry - 2.3. Process automation - 2.4. Module-based planning approach - 2.5. Example of implementation : Reel
- 3. TRANSFERRING BATCH TO CONTINUOUS MANUFACTURING: FIRST APPROACHES TOWARDS AN INNOVATIVE PAINT PRODUCTION : 3.1. Introduction - 3.2. Manufacturing concepts for the paint industry - 3.3. Adaptation of a batch process for transition to continuous operation - 3.4. Case study I: Writing inks - implementation of product change and cleaning strategies - 3.5. Case study II: Paints and varnishes – adaptation of the production process - 3.6. Parameter-based quality-assurance during production
- 4. KEEPING DISTANCE : 4.1. Right distance for a maximum light scattering - 4.2. New technology for correct dispersion - 4.3. Manufacturing tinting pastes (colourants) - 4.4. TiO slurry and intermediates
- 5. PRINTING THE WAY TO BETTER APPLICATION : 5.1. 3D-printing to create ideal applicatorEn ligne : https://drive.google.com/file/d/1bvyo1LArT_pS7m85qrPEGkD4w-z1GsQ_/view?usp=shari [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37796 Documents numériques
Automation in coatings productionURL Aziridine cure of acrylic colloidal unimolecular polymers (CUPs) / Jigar K. Mistry in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)
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PermalinkBasalt fibers as functional additives in coating of textiles / Carolin Ruffen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)
PermalinkPermalinkBayer en Eurocoat 94 / Bayer / Leverkusen [Allemagne] : Bayer (1994)
PermalinkBayer : polyurethanes inside-out / Nick Smith in PAINTINDIA, Vol. LXI, N° 9 (09/2011)
PermalinkBeneficial dry film biocides / Dave Alexander in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 202, N° 4568 (01/2012)
PermalinkBenefits over risks / Thomas Wunder in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 200, N° 4551 (08/2010)
PermalinkPermalinkBinder for hygienic paints / C. Butler in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 200, N° 4546 (03/2010)
PermalinkBinders for low odor/low VOC premium paints with outstanding functional properties / Satish Gaonkar in PAINTINDIA, Vol. LX, N° 2 (02/2010)
PermalinkBio mimicking of lotus effect by 3D printing / K. K. Sengupta in PAINTINDIA, Vol. LXIX, N° 1 (01/2019)
PermalinkBivariate approach to viscosity adjustment / Michael J. Eiseman in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 67, N° 840 (01/1995)
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