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Ability of metallic nano-particles to provide UV protection to wood surface : a preliminary experiment / Tengfei Yi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 5 (09/2022)
[article]
Titre : Ability of metallic nano-particles to provide UV protection to wood surface : a preliminary experiment Type de document : texte imprimé Auteurs : Tengfei Yi, Auteur ; Jeffrey J. Morrell, Auteur Année de publication : 2022 Article en page(s) : p. 1535-550 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alumine
Bois -- Revêtements protecteurs
Caractérisation
Colorimétrie
Dioxyde de silicium
Dioxyde de titane
Evaluation
Fourier, Spectroscopie infrarouge à transformée de
Mouillabilité
Nanoparticules
Oxyde de fer
Oxyde de zinc
Pins et constituants
Protection contre le rayonnement ultravioletIndex. décimale : 667.9 Revêtements et enduits Résumé : The effects of various nano-particle types and sizes on color, wettability, and surface chemistry of radiata pine (Pinus radiata) sapwood samples were investigated over 6 weeks of outdoor exposure. Specimens were treated with 0.2% wt/wt water dispersions of zinc oxide (ZnO), titanium dioxide (TiO2), aluminum oxide (Al2O3), silica dioxide (SiO2), cerium dioxide (CeO2), and iron oxide (Fe2O3), and four nano-sizes of Fe2O3. Color changes during exposure were characterized by measuring CIE L*a*b* color parameters, surface wettability changes were assessed using water droplet contact angle, and chemical changes were characterized by Fourier transform infrared spectroscopy (FTIR). Nano-particles protected wood from photo-discoloration to differing degrees with iron oxide providing the most effective and consistent protection. Smaller alpha Fe2O3 nano-particles provided better UV protection. Nano-particles did not reduce wettability of wood after UV exposure nor were they able to completely prevent lignin degradation. Zinc oxide nano-particles provided some cellulose and hemicellulose protection during UV exposure. Iron oxide nano-particles exhibited some potential for limiting degradation, but the differences were small and not significant from untreated controls. The results suggest that combinations of zinc and iron oxide might be useful for UV protection, and further trials are planned with these mixtures. Note de contenu : - MATERIALS AND METHODS : Materials - Characterization of nano-particles - Preparation of nano-particle solutions and treatment of wood surfaces - Exterior exposure - Color measurements - Wettability assessment - Fourier transform infrared spectroscopy (FTIR)
- RESULTS AND DISCUSSION : Nano-particle size analysis - Color changes - Surface wettability changes - FTIR spectroscopic analysis
- Table 1 : Reported and actual dimensions of nano-particles used in this study
- Table 2 : Average solution uptakes of water alone or with 0.2% wt/wt of selected nano-particles
- Table 3 : Climate conditions at the test site over the 6-week field exposure
- Table 4 : Assignments of infrared bands to molecular bonds in wood
- Table 5 : Ratios of selected peaks on the FTIR spectra with the peak at 1057 cm−1 for non-coated radiata pine wood samples before and after 6 weeks of outdoor exposure
- Table 6 : Comparisons between ratios of peak heights at 3343 or 2921/2899 cm−1 with those at 1057 cm−1 for radiata pine sapwood treated with selected nano-particles and exposed outdoors for 6 weeks
- Table 7 : Comparisons between peak heights of selected peaks with the peak at 1057 cm−1 for radiata pine sapwood treated with selected nano-particles and exposed outdoors for 6 weeksDOI : https://doi.org/10.1007/s11998-022-00628-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00628-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38288
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 5 (09/2022) . - p. 1535-550[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23672 - Périodique Bibliothèque principale Documentaires Disponible Acrylate boron silane polymer/carbon nitride–titanium dioxide composite coatings with enhancing photocatalytic antifouling performance under visible light / Yakun Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 4 (07/2023)
[article]
Titre : Acrylate boron silane polymer/carbon nitride–titanium dioxide composite coatings with enhancing photocatalytic antifouling performance under visible light Type de document : texte imprimé Auteurs : Yakun Li, Auteur ; Jianjun Liao, Auteur ; Haiqi Zhang, Auteur ; Xingsan Tang, Auteur ; Shiqiang Zhong, Auteur ; Qiuxia Li, Auteur Année de publication : 2023 Article en page(s) : p. 1445-1458 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Copolymère acrylate de bore silane
Dioxyde de titane
Formulation (Génie chimique)
Nitrure de carbone
Photocatalyse
Revêtement auto-nettoyant
Revêtements antisalissuresIndex. décimale : 667.9 Revêtements et enduits Résumé : Herein, a series of antifouling coatings (CTNCs) composed of acrylic boron silicon polymer (ABSP) and environmental-friendly photocatalysts C3N4-TiO2(B) heterojunctions were successfully prepared. Large-scale production and low-cost photocatalyst C3N4-TiO2(B) can be perfectly compounded with ABSP, realizing the possibility of engineering application. SEM and AFM analysis showed that the C3N4-TiO2(B) particles were firmly embedded in the coating, but serious agglomeration appeared when the content of the photocatalyst exceeds 7 wt%. The hydrophilic nanoparticles can accelerate the hydrolysis and adjust the self-polishing rates of the polymer matrix to repel bacteria and algae. When the content of C3N4-TiO2(B) was in the range of 5–7 wt%, the CTNCs displayed better resistance to Nitzschia closterium, Staphylococcus aureus and Escherichia coli than the coating containing pure C3N4, and the anti-bacterial rates towards S. aureus and E. coli can reach 99.72% and 98.96%. Note de contenu : - EXPERIMENTAL SECTION :
- Materials
- Preparation of TiO 2 (B) single-crystalline nanorods
- Preparation of C 3 N 4 -TiO 2 (B)
- Synthesis of ABSP
- Preparation of CTNCs
- Characterization
- RESULTS AND DISCUSSION :
- Structural characteristics of C 3 N 4 –TiO 2 (B) heterojunction
- Surface chemical states of C3N4-TiO2 heterojunction
- Surface morphology of CTNCs
- Surface wettability and self-polishing rates of CTNCs
- Diatom antisettling test
- Anti-bacterial test
- Environmental properties
- Antifouling mechanism of CTNCs
- Table 1 : The preparation formula of CTNCsDOI : https://doi.org/10.1007/s11998-022-00757-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00757-0.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39728
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 4 (07/2023) . - p. 1445-1458[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24153 - Périodique Bibliothèque principale Documentaires Disponible Acrylic binders for optimal paint film structure with improved exterior durability / Francine Signoret in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 203, N° 4588 (09/2013)
[article]
Titre : Acrylic binders for optimal paint film structure with improved exterior durability Type de document : texte imprimé Auteurs : Francine Signoret, Auteur ; Marie Bleuzen, Auteur ; A. Trapani, Auteur Année de publication : 2013 Article en page(s) : p. 36-39 Langues : Anglais (eng) Catégories : Dioxyde de titane
Durée de vie (Ingénierie)
Encapsulation
Liants
Polyacryliques
Revêtements en bâtiment:Peinture en bâtiment
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Reducing the repainting frequency of exterior coatings is a wish for most building owners, therefore, there is a continuous effort to develop longer lasting paints. A new family of pure acrylic binders has been designed to associate on to mineral particles present in a peint formulation, in particular Ti02 but also extenders, to space them optimally and offer a homogeneous peint film with superior exterior durability. Naturel exposure data in different climatic conditions confirm the benefits of this new binder technology, showing superior cheik resistance, gloss and colour retention and efflorescence resistance. The adsorption of these newly designed acrylic binders on to Ti02 pigment results, as well in a boost in hiding, which allows the paint formulator to reduce the pigment level and improve the sustainability profile of the paints. Note de contenu : - Superior durability of pure acrylic technology
- Durability improvement with the pigment encapsulation technology
- Exterior paints for wooden substratesEn ligne : https://drive.google.com/file/d/1Sibq1i0YLk0maBkU71UMXROdP6qcTnNb/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19318
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 203, N° 4588 (09/2013) . - p. 36-39[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15497 - Périodique Bibliothèque principale Documentaires Disponible Active and sensitive material systems based on composites / Hiroshi Asanuma in MATERIAUX & TECHNIQUES, N° Hors série (2002)
[article]
Titre : Active and sensitive material systems based on composites Type de document : texte imprimé Auteurs : Hiroshi Asanuma, Auteur Année de publication : 2003 Article en page(s) : p. 95-98 Note générale : Bibliogr. Langues : Français (fre) Catégories : Aluminium L'aluminium est un élément chimique, de symbole Al et de numéro atomique 13. C’est un métal pauvre, malléable, de couleur argent, qui est remarquable pour sa résistance à l’oxydation13 et sa faible densité. C'est le métal le plus abondant de l'écorce terrestre et le troisième élément le plus abondant après l'oxygène et le silicium ; il représente en moyenne 8 % de la masse des matériaux de la surface solide de notre planète. L'aluminium est trop réactif pour exister à l'état natif dans le milieu naturel : on le trouve au contraire sous forme combinée dans plus de 270 minéraux différents, son minerai principal étant la bauxite, où il est présent sous forme d’oxyde hydraté dont on extrait l’alumine. Il peut aussi être extrait de la néphéline, de la leucite, de la sillimanite, de l'andalousite et de la muscovite.
L'aluminium métallique est très oxydable, mais est immédiatement passivé par une fine couche d'alumine Al2O3 imperméable de quelques micromètres d'épaisseur qui protège la masse métallique de la corrosion. On parle de protection cinétique, par opposition à une protection thermodynamique, car l’aluminium reste en tout état de cause très sensible à l'oxydation. Cette résistance à la corrosion et sa remarquable légèreté en ont fait un matériau très utilisé industriellement.
L'aluminium est un produit industriel important, sous forme pure ou alliée, notamment dans l'aéronautique, les transports et la construction. Sa nature réactive en fait également un catalyseur et un additif dans l'industrie chimique ; il est ainsi utilisé pour accroître la puissance explosive du nitrate d'ammonium.
Composites -- Réparation
Composites à fibres de carbone
Dioxyde de titane
Epoxydes
Fibres optiques
Matériaux intelligents
Polymères
Résistance électrique
StratifiésIndex. décimale : 620.11 Matériaux (propriétés, résistance) Résumé : This paper describes new concepts the author has proposed and demonstrated to realize metal and polymer based sensitive and active structural material systems. The following topics are mainly examined : I) an active laminate of CFRP (works as "bone" and "blood vessel")/epoxy (as insulator)/aluminum (as "muscle)/electrode (to apply voltage on CFRP) of which unidirectional actuation is realized by electrical resistance heating of carbone fiber in the CFRP layer and its curvature change can be monitored using optical fiber multiply fractured in the CFRP layer (works as "nerves), and II) a multifunctional aluminum-matrix composite where TiO2/Ti composite fiber is embedded for sensing temperature and strain, generation of heat for actuation, self healing and self repair. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10279
in MATERIAUX & TECHNIQUES > N° Hors série (2002) . - p. 95-98[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000992 - Périodique Bibliothèque principale Documentaires Disponible Adsorption in latex paints in relation to some of the properties of the mill base and the final coating / Margareta Huldén in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 66, N° 836 (09/1994)
[article]
Titre : Adsorption in latex paints in relation to some of the properties of the mill base and the final coating Type de document : texte imprimé Auteurs : Margareta Huldén, Auteur ; E. Sjöblom, Auteur ; A. Saarnak, Auteur Année de publication : 1994 Article en page(s) : p. 99-105 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acide polyacrylique
Agents dispersants (chimie)
Brillance (optique)
Dioxyde de titane
Epaississants
Humidité -- Absorption
hydroxyéthylcellulose
Pigments inorganiques
Revêtements -- Propriétés optiques:Peinture -- Propriétés optiques
Revêtements en phase aqueuse:Peinture en phase aqueuse
Rhéologie
SurfactantsIndex. décimale : 667.9 Revêtements et enduits Résumé : The rheological properties, gloss, hiding power, and water absorption of some model latex paints were analyzed in terms of the adsorption of surfactants, dispersing agent, and thickener onto the latex and pigment particles. Special attention was paid to the order of addition of poly(acrylic acid) and ethyl(hydroxyethyl) cellulose, because this has an effect on the adsorption of the polymers onto the TiO2 pigment. The order of addition also affects the rheological properties of the mill base dispersion and the gloss of the paint. The gloss was also affected by the surfactant used to stabilize the latex. Higher gloss was obtained using a nonionic surfactant than with an anionic surfactant Note de contenu : - PAINT INGREDIENTS-ADSORBENTS AND ADSORBATES
- ADSORPTION : Adsorption on the latex particles - Adsorption on the TiO2 pigment
- CHARACTERIZATION OF PAINTS-METHODS : Paint formulations - Measurement of rheological properties - Characterization of the final coating
- RESULTS AND DISCUSSION : Rheological properties of mill base formulations - Rheological properties of the paints - Properties of the final coatingsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18705
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 66, N° 836 (09/1994) . - p. 99-105[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003470 - Périodique Bibliothèque principale Documentaires Disponible 003483 - Périodique Bibliothèque principale Documentaires Exclu du prêt Advanced adsorption for actives application / Lorna M. Kessel in SOFW JOURNAL, Vol. 133, N° 4 (04/2007)
PermalinkAdvanced light protection with titanium dioxide / Jutta zur Lage in SOFW JOURNAL, Vol. 143, N° 9 (09/2017)
PermalinkAg and Ag/TiO2 nano-dispersed systems for treatment of leathers with strong antifungal properties / Carmen Gaidau in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 3 (03/2011)
PermalinkAg NPs deposited TiO2 coating material for superhydrophobic, antimicrobial and self-cleaning surface fabrication on fabric / Hakan Görgülüer in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)
PermalinkPermalinkAn enhancement in the photocatalytic activity of TiO2 by the use of Pd : the question of layer sequence in the resulting hierarchical structure in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 1 (01/2011)
PermalinkAn irreplaceable additive / Ingo Sartorius in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 6-7 (06-07/2019)
PermalinkApplication of antimicrobial nano-materials on leather : a review / Meruyert Koizhaiganova in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 4 (07-08/2017)
PermalinkApplication of Mn-doped mesoporous TiO2 in tannery wastewater treatment / Xiu He in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 6 (11-12/2019)
PermalinkApplication of nanometre materials in modifying acrylate latex / Yilu Gong in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 209, N° 4651 (05/2019)
PermalinkApplication of nanostructured titanium dioxide pigments in paper coating: a comparison between prepared and commercially available ones / Fatma A. Morsy in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)
PermalinkApplication of titanium metal oxide nanoparticles for leather coating / Sivaraj Sudhahar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 3 (03/2013)
PermalinkApproaches to minimize titanium dioxide consumption in coatings- a review / Nandkumar Kadam in PAINTINDIA, Vol. LXIX, N° 9 (09/2019)
PermalinkAssociative polymer/particle dispersion phase diagrams III : Pigments / Edward Kostansek in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 3 (07/2006)
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