Accueil
Catégories
> Dioxyde de silicium
Dioxyde de siliciumVoir aussi
|
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
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
in ADHESION - ADHESIVES + SEALANTS > N° 4/2008 (04/2008) . - p. 11-15[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 13505 - Périodique Bibliothèque principale Documentaires Disponible UV-cured coatings based on waterborne resins ans Si02 nanoparticles / Anna di Gianni in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 2 (06/2009)
[article]
Titre : UV-cured coatings based on waterborne resins ans Si02 nanoparticles Type de document : texte imprimé Auteurs : Anna di Gianni, Auteur ; Stefano Turri, Auteur ; Roberta Bongiovanni, Auteur ; Flavio Deflorian, Auteur ; Giulio Malucelli, Auteur ; Giancarlo Rizza, Auteur Année de publication : 2009 Article en page(s) : p. 177-185 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Corrosion
Dioxyde de silicium
Nanoparticules
Photopolymères
Polymérisation
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements en phase aqueuse:Peinture en phase aqueuse
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : The UV-curing technique in combination with the use of waterborne resins is very attractive since it gives the opportunity to get solid coatigs by means of ecofriendly processes. We found that it is possible to use such UV curable water-based formulations as matrices for the preparation of nanocomposites in which the filler is generated in situ by means of the sol-gel chemistry. We prepared silica-based nanocomposites and characterized ther comparing their performances with those of the silica-free coatings. Moreover, the article discusses the influence of the addition of a coupling agent between the organic and inorganic phase on the final properties of the nanocomposites. DOI : 10.1007/s11998-008-9137-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9137-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5603
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 2 (06/2009) . - p. 177-185[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 011361 - Périodique Bibliothèque principale Documentaires Disponible Variable structural colors and hydrophobicity of SiO2/polyethyleneimine coating on glass substrate / Yongtang Jia in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 6 (11/2015)
[article]
Titre : Variable structural colors and hydrophobicity of SiO2/polyethyleneimine coating on glass substrate Type de document : texte imprimé Auteurs : Yongtang Jia, Auteur ; Yun Zhang, Auteur ; Guangqing Zhuang, Auteur ; Qinguo Fan, Auteur ; Jianzhong Shao, Auteur ; Guojin Liu, Auteur Année de publication : 2015 Article en page(s) : p. 1031-1039 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact
Couleur
Dioxyde de silicium
Hydrophobie
Polyéthylènimines
Verre -- RevêtementsIndex. décimale : 667.9 Revêtements et enduits Résumé : Films composed of nanoparticles have been commonly used in decorative applications due to their striking colors and useful self-cleaning properties. An efficient option for the structural coloration has been developed through fabrication of the thin films on substrates from SiO2 nanoparticles and PEI. The surface morphology and microstructure of SiO2/polyethyleneimine (PEI) film on glass substrate were analyzed with an SEM, AFM, and thickness analyzer. The homogeneous coatings of limited SiO2 aggregation with air voids were formed on glass substrates. It was strongly suggested that optical properties of the films came from the single-layer thin film interference effect. The structural colors of SiO2/PEI films were captured by digital camera, integrating sphere spectrophotometer and multi-angle spectrophotometer. The results indicated that the films illuminated distinctly as the thickness increased, and presented different lightness values and hues at various viewing angles. Moreover, those films with some surface roughness exhibited high water static contact angle, which endowed the films potential hydrophilicity and self-cleaning property. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Preparation of the solutions - Preparation of the composite SiO2/PEI thin films - Characterization
- RESULS AND DISCUSSION : Variable colors through a single-layer interference effect - Structural colors of the SiO2/PEI films with various thickness - Color variation at different angles - Hydrophobic property of the SiO2/PEI coatingDOI : 10.1007/s11998-015-9708-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9708-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24952
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 6 (11/2015) . - p. 1031-1039[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 17585 - Périodique Bibliothèque principale Documentaires Disponible Vulcanization kinetics and mechanical properties of filled ethylene-vinyl acetate copolymer rubber composites / Changfa Xiao in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 4 (2023)
[article]
Titre : Vulcanization kinetics and mechanical properties of filled ethylene-vinyl acetate copolymer rubber composites Type de document : texte imprimé Auteurs : Changfa Xiao, Auteur ; Qingshan Yang, Auteur ; Kefu Shao, Auteur ; Yongjiang Li, Auteur ; Songhan Wan, Auteur ; Xianru He, Auteur Année de publication : 2023 Article en page(s) : p. 496-504 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caoutchouc -- Propriétés mécaniques
Charges (matériaux)
Cinétique chimique
Copolymère éthylène acétate de vinyle
Dioxyde de silicium
Hydroxyde d'aluminium
Hydroxyde de magnésiumL'hydroxyde de magnésium est un composé inorganique de formule Mg(OH)2. Ce sel se présente sous la forme d'une poudre pratiquement insoluble dans l'eau. Le « lait de magnésie » est une solution saturée d'hydroxyde de magnésium, d'aspect laiteux. Sa forme minérale naturelle est connue sous le nom de brucite.
L'hydroxyde de magnésium est utilisé en thérapeutique comme antiacide (pour calmer les brûlures d'estomac) et comme laxatif.
Noir de carbone
VulcanisationIndex. décimale : 668.4 Plastiques, vinyles Résumé : The vulcanization reaction of ethylene vinyl acetate copolymer (EVM) rubber is fast, resulting in poor processing safety. EVM is often filled with flame-retardant fillers as insulating or sheathing material for wires and cables. Herein, the effects of flame-retardant magnesium hydroxide (Mg(OH)2), aluminum hydroxide (Al(OH)3) and of the traditional reinforcing fillers carbon black (CB) and silicon dioxide (SiO2) on the vulcanization kinetics of EVM were investigated. The vulcanization characteristics showed that the scorch time (T10) of the unfilled EVM (KB), SiO2/EVM, Mg(OH)2/EVM, and Al(OH)3/EVM composites was about 1.75 min. T10 of the CB/EVM composite was 2.22 min. Compared with KB, the activation energy (E a ) increased by about 15 kJ/mol for CB/EVM composites and by about 5 kJ/mol for SiO2/EVM, Mg(OH)2/EVM and Al(OH)3/EVM composites. The results indicate that CB delays the vulcanization time of EVM rubber, slows down the rate of vulcanization reaction and improves the safety of vulcanization. The addition of SiO2, Mg(OH)2 and Al(OH)3 has little effect on the vulcanization reaction. The mechanical properties show that CB/EVM is more uniformly vulcanized and has the best mechanical properties with a tensile strength of 17.61 MPa and elongation at break of 404.58 %. Mg(OH)2/EVM and Al(OH)3/EVM samples have prominent vulcanization non-uniformity resulting in poor mechanical properties. Note de contenu : - EXPERIMENT : Materials - Preparation of EVM composites
Instrumentation
- RESULTS AND DISCUSSION : Vulcanization - Analysis of DSC curves - Kinetics of vulcanization reaction - Determination of vulcanization conditions - Mechanical properties
- Table 1 : The basic formula of EVM composites
- Table 2 : E a of EVM composites
- Table 3 : Reaction order (n) and frequency factor (A) of the EVM composites
- Table 4 : Curing temperature and time of EVM compositesDOI : https://doi.org/10.1515/ipp-2023-4365 En ligne : https://drive.google.com/file/d/1IsIBs5T_3PJMCX23rUGa3XcvnJWo7xNP/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40111
in INTERNATIONAL POLYMER PROCESSING > Vol. 38, N° 4 (2023) . - p. 496-504[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24319 - Périodique Bibliothèque principale Documentaires Disponible Wet coating of calcite with silica nanoparticles in CO2 environment / Qitong Liu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 1 (01/2024)
[article]
Titre : Wet coating of calcite with silica nanoparticles in CO2 environment Type de document : texte imprimé Auteurs : Qitong Liu, Auteur ; Payam Hosseini, Auteur ; Raghavendra Ragipani, Auteur ; Bu Wang, Auteur Année de publication : 2024 Article en page(s) : p. 423-434 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Calcite Grâce à leurs performances analytiques, on observe un intérêt croissant pour l’utilisation des installations en rayonnement synchrotron et de certains appareils portables employant des sources de rayons X afin d’analyser, de révéler et de conserver les matériaux des objets du patrimoine.
La diffraction des rayons X va ainsi permettre de révéler la complexité de la nature des pigments utilisés par les artistes : c’est par la structure de la matière cristalline que l’on peut comprendre certaines de leurs propriétés optiques et mécaniques ainsi que leurs modes de synthèse.
Caractérisation
Dioxyde de silicium
Enrobage (technologie)
Granulométrie
Nanoparticules
Particules (matières)
Potentiel zeta
Revêtement humideIndex. décimale : 667.9 Revêtements et enduits Résumé : Calcite particles coated with nano-silica find use in applications such as enhanced oil recovery, paper-making, and thermal energy storage. In this study, the surface coating of calcite particles by silica nanoparticles (nano-SiO2) in aqueous solutions assisted by a CO2 environment was investigated. The result indicates that the coating performance can be controlled by altering the electrostatic attraction between calcite and nano-SiO2, with the calcite surface charge being the predominant factor. An elevated CO2 partial pressure (up to 3.7 atm) is beneficial for the coating process. However, similar coating performance can be achieved under lower CO2 partial pressures by introducing calcium salt into the aqueous solution. With the addition of 15 wt% of nano-SiO2 in a 6.5 mM CaCl2 solution, a nano-SiO2 loading content of 12.6 wt% (with an average calcite particle size of 6.74 µm) was achieved under 1 atm CO2 pressure after 24 h of the coating experiment. Overall, the coating of calcite surfaces with high contents of well-dispersed nano-SiO2 can be achieved in a CO2 environment, and calcium salts can be used to reduce the required CO2 pressure. As such, it is potentially feasible to integrate wet coating into aqueous carbonation-based CO2 mineralization processes to enhance process economics by making nano-SiO2-coated calcite a valuable byproduct. Note de contenu : - MATERIALS AND METHODS : Materials - Coating experiment - Sample characterizations - Particle size analysis (PSA) - Scanning electron microscopy (SEM) - Thermogravimetric analysis (TGA) - Zeta potential (ZP) measurement - Surface area measurement - Stability test
- RESULTS AND DISCUSSION : Characterization of calcite coated with nano-SiO2 - Effect of the CO2 environment on coating performance - Role of calcium concentration in coating performance - Enhancing the experimental feasibility and loading content
- Table 1 : The zeta potential of calcite and nano-SiO2
- Table 2 : Quantity of coated nano-SiO2 before and after stability testsDOI : https://doi.org/10.1007/s11998-023-00812-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00812-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40463
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 1 (01/2024) . - p. 423-434[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24443 - Périodique Bibliothèque principale Documentaires Disponible