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Exploring the use of bio-derived, isosorbide-based polyols in the synthesis of high-performance polyurethanes / Jiae Kim in SURFACE COATINGS INTERNATIONAL, Vol. 105.4 (07-08/2022)
[article]
Titre : Exploring the use of bio-derived, isosorbide-based polyols in the synthesis of high-performance polyurethanes Type de document : texte imprimé Auteurs : Jiae Kim, Auteur Année de publication : 2022 Article en page(s) : p. 312-313 Langues : Anglais (eng) Catégories : Biomatériaux
Essais de résilience
IsosorbideL’isosorbide est un composé hétérocyclique obtenu à partir de la double réaction de déshydratation du sorbitol, lui-même issu de la réaction d’hydrogénation du glucose.
L’isosorbide est un diol issu des agro-ressources, non toxique, biodégradable et stable thermiquement.
L’isosorbide est un monomère qui peut être inséré dans des chaînes macromoléculaires de type polymères (polycarbonates, polyuréthanes, polyesters…). Il est également utilisé pour la synthèse de dérivés tels que les diesters, diéthers, dinitrates…
L’isosorbide est considéré comme synthon donnant accès à une nouvelle plateforme chimique d’intérêt puisqu’il est issu du végétal et permet d’obtenir de nombreux dérivés aux propriétés égales voire supérieures à leurs homologues de la pétrochimie.
Polyols
Polyuréthanes
Résistance chimique
Ressources renouvelables
Revêtements -- Propriétés mécaniques
Revêtements bi-composant
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Polyurethanes (PUs) are an extremely flexible and widely used class of industrial polymers. Typically made by reacting polyols with diisocyanates, PU chemistry has inherent versatility through the wide range of both types of monomers available for use, but as with most polymers, these are mostly derived from fossil fuel-based building blocks. Those working at the forefront of PU chemistry are now transitioning to a palette of bio-derived alternatives to enable society's continuing use of these valuable materials and simultaneously access new performance profiles. Note de contenu : - Creating new polyols for PU synthesis
- Case study : Improving the abrasion resistance, impact resistance and adhesion of two-component PU coatings
- Fig. 1 : Manufacture of isosorbide from renewable, plant-based feedstocks
- Fig. 2 : Renewable plant-based sources of succinic acid and isosorbide have an important role to play in the 'greening' of polyurethane chemistry
- Fig. 3 : Chemical resistance test results for 2K PU coatings formulated with Avio 2426 confirm enhanced performance relative to a commercial polyester diol alternative against caustic and SkydrolEn ligne : https://drive.google.com/file/d/1OKUsUYax1Pk5aEsoi4jNLyA27WGf0Cmu/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37923
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Code-barres Cote Support Localisation Section Disponibilité 23511 - Périodique Bibliothèque principale Documentaires Disponible Exploring the use of bio-derived, isosorbide-based polyols in the synthesis of high-performance polyurethanes / Jiae Kim in SURFACE COATINGS INTERNATIONAL, Vol. 105.5 (09-10/2022)
[article]
Titre : Exploring the use of bio-derived, isosorbide-based polyols in the synthesis of high-performance polyurethanes Type de document : texte imprimé Auteurs : Jiae Kim, Auteur Année de publication : 2022 Article en page(s) : p. 396-397 Langues : Anglais (eng) Catégories : Biopolymères
IsosorbideL’isosorbide est un composé hétérocyclique obtenu à partir de la double réaction de déshydratation du sorbitol, lui-même issu de la réaction d’hydrogénation du glucose.
L’isosorbide est un diol issu des agro-ressources, non toxique, biodégradable et stable thermiquement.
L’isosorbide est un monomère qui peut être inséré dans des chaînes macromoléculaires de type polymères (polycarbonates, polyuréthanes, polyesters…). Il est également utilisé pour la synthèse de dérivés tels que les diesters, diéthers, dinitrates…
L’isosorbide est considéré comme synthon donnant accès à une nouvelle plateforme chimique d’intérêt puisqu’il est issu du végétal et permet d’obtenir de nombreux dérivés aux propriétés égales voire supérieures à leurs homologues de la pétrochimie.
Polymères -- Synthèse
Polymères hautes performances
Polyols
Polyuréthanes
Résistance chimique
Revêtements -- Propriétés mécaniques
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Polyurethanes (PUs) are an extremely flexible and widely used class of industrial polymers. Typically made by reacting polyols with diisocyanates, PU chemistry has inherent versatility through the wide range of both types of monomers available for use, but as with most polymers, these are mostly derived from fossil fuel-based building blocks.Those working at the forefront of PU chemistry are now transitioning to a palette of bio-derived alternatives to enable society's continuing use of these valuable materials and simultaneously access new performance profiles. Note de contenu : - Creating new polyols for PU synthesis
- Case study : Improving the hardness of PU dispersions
- Table 2 : Mechanical test results for PUD coatings (300pm), formulated with novel bio-derived polyols (AvioTM 2426 and AvioTM 2962), compared to coatings formulated with commercially available polyester and polycarbonate diols of comparable molecular weight
- Table 3 : Chemical resistance test results for PUDs formulated with novel bio-derived polyols (AvioTM 2426 and AvioTM 2962)En ligne : https://drive.google.com/file/d/1olSL0egSMj3Hd0nKcCBSbwrCcQjA4RSJ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38299
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Code-barres Cote Support Localisation Section Disponibilité 23675 - Périodique Bibliothèque principale Documentaires Disponible Fabrication method of large-scale and mechanically durable superhydrophobic silicon rubber/aerogel coating on fibrous substrates / Nowrouz Mohammad Nouri in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 2 (03/2017)
[article]
Titre : Fabrication method of large-scale and mechanically durable superhydrophobic silicon rubber/aerogel coating on fibrous substrates Type de document : texte imprimé Auteurs : Nowrouz Mohammad Nouri, Auteur ; Mohammad Saadat-Bakhsh, Auteur Année de publication : 2017 Article en page(s) : p. 477–488 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aérogels
Angle de contact
Angle de glissement
Elastomères silicones vulcanisables à chaud
Essais de résilience
Hydrophobie
Matériaux fibreux
Pulvérisation électrostatique
Revêtements -- Propriétés mécaniques
Surfaces (technologie)
ToluèneLe toluène, également appelé méthylbenzène ou phénylméthane est un hydrocarbure aromatique sous la forme d'un liquide transparent, très répandu et utilisé comme produit de départ industriel ou comme solvant. Il dissout un grand nombre d'huiles, graisses, résines (naturelles ou de synthèse). Il a une odeur caractéristique (type dissolvant pour peinture) rappelant celle, douceâtre, du benzène apparenté.Index. décimale : 667.9 Revêtements et enduits Résumé : We report on a simple and large-scale method for the fabrication of mechanically durable superhydrophobic coatings via electrostatic powder spray of aerogel micro particles on the fibrous substrates. The coatings are obtained by dip-coating fibrous substrates in silicon rubber/toluene solution, followed by the electrostatic spray of aerogel micro particles on the samples. The method is applicable to a large number of fibrous substrates with different pore sizes. Depending on the silicon rubber solution concentration, it is possible to obtain surfaces with hierarchical morphology. The wetting behavior dependent on the concentration of silicon rubber/toluene solution can provide coatings with static water contact angles (160°–168°) and sliding angles (3°–21°). Fibrous surfaces obtained were characterized by scanning electron microscopy and static water contact angle measurement. Also, mechanical durability of the surfaces was examined using high pressure airflow, sandpaper abrasion test, and water static pressure. Note de contenu : - EXPERIMENTAL SECTION : Dip-coating of substrates - Electrostatic powder spray of aerogel particles
- RESULTS AND DISCUSSION : Surface morphology - Static water contact angle (CA) and sliding angle (SA) measurements - Mechanical stabilityDOI : 10.1007/s11998-016-9868-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9868-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28162
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Code-barres Cote Support Localisation Section Disponibilité 18781 - Périodique Bibliothèque principale Documentaires Disponible Fabrication of a nonionic self-emulsifiable waterborne epoxy curing agent with high cure properties / Xiaofeng Huang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)
[article]
Titre : Fabrication of a nonionic self-emulsifiable waterborne epoxy curing agent with high cure properties Type de document : texte imprimé Auteurs : Xiaofeng Huang, Auteur ; Lei Wang, Auteur ; Yingbiao Lai, Auteur ; Laizhou Li, Auteur ; Xiang Jiang, Auteur Année de publication : 2021 Article en page(s) : p. 549-558 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Caractérisation
Composés organiques -- Synthèse
Mesure
Revêtements -- Propriétés mécaniques
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Waterborne epoxy curing agent plays a key part in the waterborne epoxy resin coatings, directly affecting the physical and chemical properties of the coating film. Here, we present triethylene tetramine (TETA), polypropylene glycol diglycidyl ether (PPGDGE), epoxy resin E20 and phenyl glycidyl ether (PGE) as reactants to fabricate a novel nonionic self-emulsifiable waterborne epoxy curing agent for oily epoxy resin through three steps of chain extension reaction, addition reaction, and capping reaction. The curing agent achieved excellent emulsifying and curing properties under the condition that TETA reacted with PPGDGE at 65°C for 4 h with the molar ratio of 2.2:1, 40% primary amine was added with E20 at 65°C for 3 h and 125% residual primary amine was capped with PGE at 65°C for 3 h. The as-prepared waterborne epoxy curing agent was characterized by Fourier transform-infrared spectroscopy and surface tension. The cured film of emulsified oily epoxy resin (E51) prepared by the as-prepared curing agent indirectly was characterized by scanning electron microscopy, thermogravimetric analysis and differential scanning calorimetry tests. The 2K waterborne epoxy coating film prepared by the as-prepared nonionic self-emulsifiable curing agent and E51 displayed better thermal property, surface appearance, flexibility, impact resistance, adhesion, and chemical corrosion resistance. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of self-emulsifiable epoxy curing agent - Emulsifying of oily epoxy resin - Measurement and characterization
- RESULTS AND DISCUSSION : Fabrication of self-emulsifiable waterborne epoxy curing agent - Properties of 2K waterborne epoxy coating film
- Scheme 1 : The three steps of chemical reaction for synthesis of the self-emulsifiable epoxy curing agent
- Table 1 : Influence of the molar ratio of TETA to PPGDGE on emulsifying and curing properties
- Table 2 : Influence of the molar ratio of E20 to the adduct on emulsifying and curing properties
- Table 3 : Influence of the molar ratio of PGE to the residual –NH2 group on emulsifying and curing properties
- Table 4 : Performance parameter of waterborne epoxy curing agent
- Table 5 : Comparison of mechanical properties and corrosion resistance between different epoxy resin filmsDOI : https://doi.org/10.1007/s11998-020-00423-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00423-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35614
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Code-barres Cote Support Localisation Section Disponibilité 22701 - Périodique Bibliothèque principale Documentaires Disponible Facile fabrication of durable superhydrophobic SiO2/polyacrylate composite coatings with low nanoparticle filling / Yanfen Huang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)
[article]
Titre : Facile fabrication of durable superhydrophobic SiO2/polyacrylate composite coatings with low nanoparticle filling Type de document : texte imprimé Auteurs : Yanfen Huang, Auteur ; Bin Chen, Auteur ; Zaosheng Lv, Auteur ; Fen Guo, Auteur Année de publication : 2020 Article en page(s) : p. 1289-1295 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Caractérisation
Copolymères -- Synthèse
Copolymères acrylates fluorés
Dioxyde de silicium
Fluoropolymères
Hydrophobie
Matériaux hybrides
Nanoparticules
Polyacrylates
Revêtement auto-nettoyant
Revêtements -- Propriétés mécaniques
Revêtements organiques
Stabilité thermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : This study aimed to prepare superhydrophobic coatings that could be used for practical applications. Nanocomposites of polyacrylate containing silica nanoparticles were prepared by dispersing silica sol in a polyacrylate solution. Superhydrophobicity was attainable for nanocomposite coatings with a filler percentage of only 15 wt%. Reducing the loading of silica nanoparticles not only minimized the costs but also simplified the preparation. The superhydrophobic coatings with water contact angle as high as 155.4° and contact angle hysteresis of 5.6° exhibited good self-cleaning property. The superhydrophobic nanocomposite coatings also displayed good mechanical properties and excellent thermal stabilities that favor indoor and outdoor applications. The superhydrophobic nanocomposite coatings can be used on various substrate surfaces, including glass plates, polymethyl methacrylate plates, polycarbonate plates, and aluminum sheets. Given their large-scale and low-cost fabrication, superhydrophobic coatings show great promise in practical applications in a broad range of fields. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of fluorinated acrylate copolymers - Preparation of coatings - Characterization
- RESULTS AND DISCUSSION : Hydrophobicity of the coatings - Surface morphological features of as-prepared coatings - Thermal stability properties of as-prepared coatings - Mechanical properties of as-prepared coatingsDOI : https://doi.org/10.1007/s11998-020-00347-y En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00347-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34574
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Code-barres Cote Support Localisation Section Disponibilité 22303 - Périodique Bibliothèque principale Documentaires Disponible Facile fabrication of the durable micro/nano-superhydrophilic/superoleophobic surface through one-step spraying for efficient oil–water separation / Mengfan Luo in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 3 (05-06/2020)
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