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Preparation and surface characterisation of novel epoxy-based organic-inorganic nano-composite coatings / M. Å pÃrková in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 88, B4 (12/2005)
[article]
Titre : Preparation and surface characterisation of novel epoxy-based organic-inorganic nano-composite coatings Type de document : texte imprimé Auteurs : M. Å pÃrková, Auteur ; J. Kotek, Auteur ; M. Å louf, Auteur ; J. Baldrian, Auteur ; J. Brus, Auteur Année de publication : 2005 Article en page(s) : p. 237-242 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Angle de contact
Caractérisation
Colloides
Epoxydes
Microscopie à rayons X
Montmorillonite
Résonance magnétique nucléaire
Revêtements
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.
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : Hybrid organic-inorganic coatings were prepared by a combination of the polyaddition reactions used for the synthesis of the organic polymeric matrix and by the sol-gel process for the in situ formation of inorganic structures. Two admixtures, differing in size and shape (montmorillonite and colloidal silica), were added to the reaction system. Surface, mechanical and other properties of the resultant products are discussed with respect to the composition and the technique of preparation. Note de contenu : - EXPERIMENTAL : Materials and technique of preparation - Methods of characterisation
- RESULTS AND DISCUSSION : Surface characterisation - NMR spectroscopy - Wide-angle x-ray scattering (WAXS) - Transmission electron microscopy (TEM)
- Table 1 : Conditions for coating preparation
- Table 2 : Tensile characteristics and WAXS periodicity of free-standing filmsDOI : 10.1007/BF02699578 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699578.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5401
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 88, B4 (12/2005) . - p. 237-242[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003404 - Périodique Bibliothèque principale Documentaires Disponible Preparation of modified montmorillonite/graphene oxide composites to enhance the anticorrosive performance of epoxy coatings / Quanxian Hua in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)
[article]
Titre : Preparation of modified montmorillonite/graphene oxide composites to enhance the anticorrosive performance of epoxy coatings Type de document : texte imprimé Auteurs : Quanxian Hua, Auteur ; Ben Jing, Auteur ; Mengyuan He, Auteur ; Panfei Sun, Auteur ; Qiang Zhao, Auteur ; Shilong Su, Auteur ; Guanjie Hu, Auteur ; Songjie Li, Auteur Année de publication : 2023 Article en page(s) : p. 1110-1119 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Caractérisation
Composés organiques -- Synthèse
Electrochimie
Epoxydes
Hydrophobie
Montmorillonite
Oxyde de graphène
Réaction de couplage
Revêtements organiques
SilanesIndex. décimale : 667.9 Revêtements et enduits Résumé : Modified montmorillonite/graphene oxide composites (AM@GO) were prepared by a hydrothermal method with silane coupling agent-modified montmorillonite (APTES@MMT) and combined with GO. The structures of the composites were characterized by FTIR, XRD, Raman spectroscopy, BET analysis, and SEM. The results showed that the composites had increased interlayer spacing and formed a loosely laminated stacked structure. The specific surface area (31.6863 m2/g) and pore volume (0.0104 cm3/g) of the composites increased. The hydrophobic and anticorrosive properties of the composite coatings were investigated and compared to the epoxy coating. The composite coatings (AM@GO/EP) had larger contact angles and smoother surfaces than the epoxy coating (EP). After 30 days of immersion, the value of |Z|0.01 Hz was approximately 1011 Ω cm2, which had changed slightly since initial immersion. Mechanistic analysis shows that the improved corrosion resistance of the composite coatings was due to the high specific surface area of the 2D material, the oxygen-containing groups of GO, the amino groups of APTES@MMT and the synergy between the MMT and the GO nanosheets. Note de contenu : - Materials
- Synthesis of APTES@MMT(AM)
- Synthesis of GO
- Synthesis of AM@GO
- Epoxy composite coating preparation
- Electrochemical measurements
- Structural characterization
- Table 1 : Impedance values of different types of coatings under different immersion daysDOI : https://doi.org/10.1007/s11998-022-00731-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00731-w.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39451
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 3 (05/2023) . - p. 1110-1119[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24069 - Périodique Bibliothèque principale Documentaires Disponible Preparation of nanocomposites containing montmorillonite and SiO2 particle for leather tanning agent / Yan Bao in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 12 (12/2012)
[article]
Titre : Preparation of nanocomposites containing montmorillonite and SiO2 particle for leather tanning agent Type de document : texte imprimé Auteurs : Yan Bao, Auteur Année de publication : 2012 Article en page(s) : p. 429-434 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chlorure d'ammonium
Chrome trivalent -- Absorption
Copolymérisation
Diffractométrie de rayons X
Dioxyde de silicium
Fourier, Spectroscopie infrarouge à transformée de
Matériaux hybrides
Méthacrylique, AcideL'histoire de l'acide méthacrylique commence en 1865, année où il est synthétisé pour la première fois à partir du méthacrylate d'éthyle.
L'acide méthacrylique est très réactif avec les groupes carboxyles, vinyles et esters.
Montmorillonite
Nanoparticules
Polyacide méthacrylique
Polymérisation
Surfactants
TannageIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Nanocomposites containing montmorillonite (layered silicate clay) and SiO2 particle were prepared via in-situ polymerization. The effect of synthesis conditions, such as surfactant and SiO2 content, on the application properties of nanocomposite were investigated in details. Nanocomposite, which used hexadecyl trimethyl ammonium chloride as the surfactant, had the best application properties. The incorporation of SiO2 was favored for improvement of wet-heat resistance temperature of the leather, in contrast to the nanocomposite without SiO2. Nanocomposite facilitate the absorption of chrome. Fourier transform infrared spectroscopy (FT-IR) spectrum demonstrated that methacrylic acid was polymerized in the montmorillonite inter-lamellar and nano-SiO2 was completely copolymerized with methacrylic acid monomers. X-ray diffraction (XRD) results suggested that montmorillonite layers were exfoliated during the polymerization process. Note de contenu : - EXPERIMENTAL : Materials - Preparation, characterization and application of PMAA/MMT/SiO2 nanocomposites
- RESULTS AND DISCUSSION : The mechanism of PMAA/MMT/SiO2 nanocomposite - Effect of surfactants - Effect of SiO2 contents - The application properties of PMAA/MMT/SiO2 nanocomposite - The structure of nanocompositeEn ligne : https://drive.google.com/file/d/1ldRPzC5tEuoFerjhqpR1tHYKVNlerhJv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16751
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVII, N° 12 (12/2012) . - p. 429-434[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14407 - Périodique Bibliothèque principale Documentaires Disponible Preparation of novel organo-montmorillonite and its influence on the acid resistance of hybrid cathodic electrodeposition polyurethane coating / Zijian Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 2 (03/2019)
[article]
Titre : Preparation of novel organo-montmorillonite and its influence on the acid resistance of hybrid cathodic electrodeposition polyurethane coating Type de document : texte imprimé Auteurs : Zijian Li, Auteur ; Cuiping Li, Auteur ; Dongxin Li, Auteur ; Yuxiang Jiang, Auteur ; Zaifeng Li, Auteur Année de publication : 2019 Article en page(s) : p. 597-605 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Electrophorèse
Matériaux hybrides
Montmorillonite
Polymères à terminaison hydroxyle
Polyuréthanes
Pulvérisation cathodique
Résistance chimique
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 : Based on the super-composite effect of clay minerals consisting of silicate layers on the polymer, nano-hybrid organic–inorganic composites have attracted great interest. In this paper, a novel organoclay with reactive hydroxyl group was prepared by incorporation into a hydroxyl-terminated cationic polyurethane oligomer (HTCPU) via interlamination. Sodium montmorillonite was organically modified with HTCPU oligomers in the water medium. The modified organo-montmorillonite was characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction, and thermogravimetric analysis. After sequential poly-addition reactions, the hydroxyl-terminated polyurethane hybrid resins with nano-silica layers were prepared and then the resin mixed with blocked hexamethylene diisocyanate trimer (crosslinking agent) in advance and then was emulsified with deionized water to produce the nano-hybrid electrophoresis coating. A series of PU films were prepared by the electrophoresis process. The optimized baking temperature was determined by in situ FTIR, and the effect of the organo-montmorillonite content on the acid resistance of film was studied. When the mass fraction of organo-montmorillonite was about 0.35%, the PU film showed the best acid resistance. It was found that the desirable appearance and properties could be obtained by a prebake of a temperature of 80°C to remove water in the wet film to avoid the pinholes in the paint film for 20 min, followed by a baking temperature of 135°C for 60 min. Note de contenu : - EXPERIMENTAL : Materials - Preparation of water-dispersed hydroxyl-terminated cationic polyurethand oligomers - Preparation of novel OMMT with reactive hydroxyl group - Preparatioin of nano-clay hybrid electrophoresis resins - Preparation of electrodeposited PU films
- CHARACTERIZATION FTIR spectroscopy - X-ray diffraction - Thermogravimetric analysis - In situ FTIR analysis - Transmission electron microscopy - Acid resistance
- RESULTS AND DISCUSSION : Characterization of novel OMMTDOI : 10.1007/s11998-018-0141-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0141-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32428
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 2 (03/2019) . - p. 597-605[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20894 - Périodique Bibliothèque principale Documentaires Disponible A rescue of colors from dye-wastewater / Saloana Santina Gomes Santos in L'ACTUALITE CHIMIQUE, N° 444-445 (10-11/2019)
[article]
Titre : A rescue of colors from dye-wastewater : a rescue of colors from dye-wastewater Type de document : texte imprimé Auteurs : Saloana Santina Gomes Santos, Auteur ; Francisco Rodrigues, Auteur ; Maria Gardênnia Fonseca, Auteur Année de publication : 2019 Article en page(s) : p. 22-28 Note générale : Bibliogr. Langues : Français (fre) Catégories : Argile
Colorants -- Adsorption
Eaux usées -- Décontamination
Eaux usées -- Epuration
Eaux usées -- Recyclage
Eaux usées -- Teneur en colorants
Montmorillonite
Photostabilité
PigmentsIndex. décimale : 667.2 Colorants et pigments Résumé : Contaminants such as dyes unproperly discharged in the environment are a big problem to overcome. Some technologies have been developed and applied for dye-wastewater treatment before its disposal in the waterbodies. Among them, adsorption is highlighted and a plenty of adsorbents are proposed in the literature.
This paper presents some clay minerals-based adsorbents applied for the rescue of colors from dye-wastewater, and the development of new pigments for artworks as an alternative to reuse the dyed adsorbents.Note de contenu : - Dyestuffs and the color paradox
- How to remove color from dye-wastewater ?
- The adsorption approaches
- How to characterize the adsorbents ?
- Custom-made clay-based solids for dye removal
- What about the adsorbents after dye removal ? How to discharge them ?
- Dyed adsorbent as new pigments
- Towards new stable and environmentally friendly pigments
- Fig. 1 : Treatment methods for the removal of dyes from wastewater effluent
- Fig. 2 :Adsorption process with adsorbent regeneration step for dyed-water decoloring
- Fig. 3 : Main analytical techniques for characterization of adsorbents
- Fig. 4 : Effect of the time in the dye removal for KSF-montmorillonite C12NH3+ hybrid
- Fig. 5 : KSF-montmorillonite/chitosan beads as adsorbent for Remazol blue dye
- Fig. 6 : Color variation of the hybrids as a function of the exchanged cation
- Fig. 7 : Solid pigments based on alizerin and carminic acid adsorbed onto Al-pillared clay and Ti-pillared clay and oil paint formulations based on these pigments before and after light irradiation
- Fig. 8 : Color of the pigments before and after 400 h under light exposure. Representation ageing of pigments followed by color change observations
- Table 1 : Some classification dyes based on chemical structure
- Table 2 : Examples of clay and clay-based solids as adsorbents for Remazol blue dyePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33040
in L'ACTUALITE CHIMIQUE > N° 444-445 (10-11/2019) . - p. 22-28[article]Réservation
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