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Thermal analyses of dye Disperse Red 1 grafted onto silica nanoparticles / Chao-Ching Chang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 4 (07/2015)
[article]
Titre : Thermal analyses of dye Disperse Red 1 grafted onto silica nanoparticles Type de document : texte imprimé Auteurs : Chao-Ching Chang, Auteur ; Feng-Hsi Huang, Auteur ; Zi-Min Lin, Auteur ; Liao-Ping Cheng, Auteur Année de publication : 2015 Article en page(s) : p. 731-738 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse thermique
Colorants
Matériaux -- Détérioration
Nanoparticules
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
Stabilité thermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Dye-grafted silica nanoparticles (GSiO2) were synthesized via a dual-step process involving, first, attachment of the organic dye Disperse Red 1 (DR1) to the coupling agent, 3-isocyanatopropyltriethoxysilane, by means of urethane bonds, and then grafting of the silylated-DR1 onto silica nanoparticles (~6 nm) prepared by hydrolysis and condensation of tetraethoxysilane in a sol–gel process. Dye-adsorbed silica nanoparticles (DSiO2) were also prepared for comparison, for which DR1 was bound only physically to silica instead of covalent bonds. The thermal behaviors of the formed GSiO2 and DSiO2 were examined by means of differential scanning calorimetry and thermal gravimetric analysis. The results showed that both the particle size and silica content have significant effects on the thermal behaviors of the dye-adsorbed and dye-grafted silica. Moreover, crystalline DR1 lost significantly its crystallinity after being adsorbed on silica, and became virtually amorphous after being grafted onto silica. The formed particles were UV-cured with a multifunctional acrylic monomer to yield color coatings on glass substrates. UV–visible spectra indicated that brightness and color saturation of the coating comprising GSiO2 could be maintained better than that comprising DSiO2 after heat treatment at 280°C. Note de contenu : - EXPERIMENTAL : Materials - Modification of the dye - Preparation of dye-grafted siilica nanoparticles - Preparation of colored coatings - Characterization
- RESULTS AND DISCUSSION : Chemical analyses - Thermal analyses of the dye-adsorbed and dye-grafted silica - Thermal stability of the coatingsDOI : 10.1007/s11998-015-9670-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9670-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24407
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 4 (07/2015) . - p. 731-738[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17366 - Périodique Bibliothèque principale Documentaires Disponible Thermal and photocuring of an acrylate-based coating resin reinforced with nanosilica particles / Mousa Ghaemy in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 5 (09/2012)
[article]
Titre : Thermal and photocuring of an acrylate-based coating resin reinforced with nanosilica particles Type de document : texte imprimé Auteurs : Mousa Ghaemy, Auteur ; Sara Bekhradnia, Auteur Année de publication : 2012 Article en page(s) : p. 569-578 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Matériaux hybrides
Nanoparticules
Photoréticulation
Polyacryliques
Revêtements:Peinture
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.Index. décimale : 667.9 Revêtements et enduits Résumé : A macromonomer, 1,3-bis[(2-hydroxy-3-acrylate)propyloxy]2-hydroxypropane (BHAPP) was prepared by the reaction of acrylic acid with diglycerol diglycidyl ether (DGE) in the presence of triethyl amine as a catalyst. The progress of the reaction was followed by measuring the decrease in intensity of the epoxide absorption peak at 915 cm?1, and structure of BHAPP was characterized by FTIR and 1H NMR spectroscopy. The effect of nanosilica (NS) particles as catalyst on thermal and photocuring of BHAPP was studied. The photopolymerization was carried out with the visible light using camphorquinone and N,N-dimethylaminoethylmethacrylate (DMAEM) as the photoinitiating system. The kinetic parameters of thermal curing were obtained using nonisothermal differential scanning calorimeter (DSC), and the data indicated that NS particles catalyzed the cure reaction by shifting the exothermic peak toward lower temperatures, decreasing the activation energy (E a), and increasing the rate constant value. The absorption properties of the cured nanocomposites were also studied in different exposure conditions. Note de contenu : - EXPERIMENTAL : Materials - Apparatus - Synthesis - Photo- and thermal curing - Water absorption
- RESULTS AND DISCUSSION : Characterization of macromer - Photocuring - Thermal curing - Water absorptionDOI : 10.1007/s11998-012-9401-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9401-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16028
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 5 (09/2012) . - p. 569-578[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14190 - Périodique Bibliothèque principale Documentaires Disponible Thermoset coatings engineered by nature / Simen Prang Folkner in EUROPEAN COATINGS JOURNAL (ECJ), (09/2023)
[article]
Titre : Thermoset coatings engineered by nature : Two component spraying enabled by green, cost-effective nanocellulose Type de document : texte imprimé Auteurs : Simen Prang Folkner, Auteur Année de publication : 2023 Article en page(s) : p. 32-36 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biomatériaux
CelluloseLa cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules.
Epoxydes
Formulation (Génie chimique)
Mélanges-maîtres (chimie)
Nanoparticules
Revêtements organiques
Rhéologie
ThermodurcissablesIndex. décimale : 667.9 Revêtements et enduits Résumé : Nanocelluloses are emerging plant-based materials, with increasing scientific attention and industrial production capacity steadily ramping up. Their application is usually limited to water-based systems, but a new process that produces epoxy resin-based nanocellulose masterbatch has been verified for application in thermoset coating. This article describes epoxy resin-based nanocellulose masterbatch and showcases the effectiveness when compared with a commercial reference. Note de contenu : - Highly effective bio-based material at low doses
- Cellulose nanofibrils in water phase to epoxy resin-phase
- Rheology of water-based CNFS
- High sag index for novel additive
- Time-saving two-component spray applications
- Wide-ranging thermoset opportunities
- Table 1 : Coating formulations used during testingEn ligne : https://drive.google.com/file/d/1mPnD_icLczyoL_UDYAPfFVHcvHA35kJv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39811
in EUROPEAN COATINGS JOURNAL (ECJ) > (09/2023) . - p. 32-36[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24190 - Périodique Bibliothèque principale Documentaires Disponible Tiny particles that make a major impact / Stephan Sprenger in ADHESION - ADHESIVES + SEALANTS, N° 4/2008 (04/2008)
[article]
Titre : Tiny particles that make a major impact Type de document : texte imprimé Auteurs : Stephan Sprenger, Auteur ; Anthony Kinloch, Auteur ; Ambrose C. Taylor, Auteur Année de publication : 2008 Article en page(s) : p. 11-15 Note générale : Bibliogr. Langues : Multilingue (mul) Catégories : Adhésifs -- Séchage sous rayonnement ultraviolet
Adhésifs structuraux
Dioxyde de silicium
Epoxydes
NanoparticulesIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : SiO2 nanoparticles in structural adhesives - Surface-modified SiO2 nanoparticles manufactured on an industrial scale are already in use in epoxy resin-based structural adhesives and UV-cured electronic adhesives. Products of this kind have been successfully used, for example, in the Airbus A380 and in the automotive industry. This article describes the properties and mechanisms of action of the nanoparticles and also covers the current status of research and development into future adhesive applications. Note de contenu : - Improved properties
- Nanoparticles in epoxy resins
- Adhesives containing nanoparticles
- Compensating for interactions
- Current researchEn ligne : https://drive.google.com/file/d/1Ey_xML8Fu6qXYi51AxsOnQ1sbvdzTPXR/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25469
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Code-barres Cote Support Localisation Section Disponibilité 13505 - Périodique Bibliothèque principale Documentaires Disponible Tone in tone dyeing : attempt to use dye encapsulated silica nanospheres in leather dyeing / Sathya Ramalingam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 12 (12/2018)
[article]
Titre : Tone in tone dyeing : attempt to use dye encapsulated silica nanospheres in leather dyeing Type de document : texte imprimé Auteurs : Sathya Ramalingam, Auteur ; Jonnalagadda Raghava Rao, Auteur Année de publication : 2018 Article en page(s) : p. 400-408 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Colloides
Colorants
Colorimétrie
Cuirs et peaux -- Teinture
Encapsulation
Evaluation
Granulométrie
Microscopie électronique en transmission
Nanoparticules
Potentiel zeta
Résistance à l'abrasion
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
Solidité de la couleur
Spectres d'absorptionIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A commercial leather dye was encapsulated into silica by simple microemulsion technique and applied as dyeing agent in leather dyeing process. Comparative studies on the performance of free dye (non-encapsulated) towards encapsulated dye are evaluated. The resultant formation of nanospheres contain dye inside the silica matrix was investigated by UV-Visible, TEM (Transmission Electron Microscopy) and DLS (Dynamic Light Scattering) measurement. The confinement effect was identified by the formation of spherical particles of the silica through encapsulation. On whole the spectroscopic studies showed that the formed silica nanospheres are stable enough to utilize as dyeing agent in leather dyeing process. The performance of encapsulated nanospheres was evaluated by utilizing as dyeing agent for upper and garment leather processing. The dye entrapped inside the silica spheres had better affinity towards the leather as demonstrated by their uniform penetration throughout its cross section and its surface coloring. The dyeing properties of the encapsulated dye were appraised by color and fastness measurement. The results showed that the dyeing characteristics of the experimental leathers were greatly improved by using encapsulated dyes versus their control leathers. Hence the idea of supporting commercial dye on/inside polymeric silica substrate enriched the leather dyeing characteristics and provide the clue for any dye for any substrate.r Note de contenu : - MATERIALS AND METHODS : Synthesis of nanocolloids contain dye encapsulated silica nanospheres - Characterization of encapsulated dye containing silica nanospheres - Evaluation of encapsulated dyes in leather dyeing - Photograph of the leather surface and cross section - Measurement of reflectance of coloured leather - Fastness property of coloured leather - Analysis of permeability of leather - Softness measurement of coloured leather
- RESULTS AND DISCUSSIONS : Absorption spectra of dye - TEM - Particle size and zeta potential - Evaluation of encapsulated dye in leather dyeing process of upper and garment leathe rprocessing - Leather photograph - Color coordinates measurement of dyed leathers - Fastness against rub during wet and dry stage - Fullness and softness measurementEn ligne : https://drive.google.com/file/d/1iKvIdTTkBrYNwRlFhED6c4PR0CPC4V3M/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31400
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIII, N° 12 (12/2018) . - p. 400-408[article]Réservation
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