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]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 5 (09/2022) . - p. 1535-550 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 ultraviolet Index. 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 weeks DOI : 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 : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38288 [article]

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Acrylic polymer influence on the structure and morphology of AgNPs obtained by chemical method for antimicrobial applications / Alexandra Pica in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 1 (01/2016) . - p. 53-61 Titre : Acrylic polymer influence on the structure and morphology of AgNPs obtained by chemical method for antimicrobial applications Type de document : texte imprimé Auteurs : Alexandra Pica, Auteur ; Cornelia Guran, Auteur ; Denisa Ficai, Auteur ; Anton Ficai, Auteur ; Florica Dumitru, Auteur Année de publication : 2016 Article en page(s) : p. 53-61 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens Argent Colloides -- Stabilité Nanoparticules Polyacryliques Réduction (chimie) Index. décimale : 667.9 Revêtements et enduits Résumé : In this article, we present the synthesis of small silver nanoparticles (AgNPs) with an average size of 1–20(50) nm. Three formulations of AgNPs-based materials have been obtained and characterized by varying the weight ratio of the silver nitrate/acrylic polymer. AgNPs were prepared by simple chemical reduction method. The reduction of AgNO3 was done by sodium borohydride in the presence of acrylic polymer, which acts also as a capping agent of AgNPs, avoiding the use of additional protective agents. The elemental analysis of AgNPs was quantified by X-ray fluorescence. The morphology and size of AgNPs were characterized by SEM and TEM–HRTEM, while the colloidal stability of AgNPs was demonstrated by zeta potential measurements. The influence of acrylic polymer on the stability of AgNPs, the particle sizes, and their antimicrobial efficacy was investigated. The results confirm that the introduction of acrylic polymer during the synthesis, acting as a stabilizing agent, increases the colloidal stability and antimicrobial performances of these formulations. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Materials - Equipment - Synthesis of silver nanoparticles - Antimicrobial activity using a time-kill procedure - RESULTS AND DISCUSSION : The colloidal stability of silver nanoparticles in aqueous solution - Morphological assessments - Antibacterial activity DOI : 10.1007/s11998-015-9721-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9721-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25371 [article]

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Activation de molécules, de particules et de surfaces par cavitation acoustique / Sergueï Nikitenko in L'ACTUALITE CHIMIQUE, N° 410 (09/2016)

[article]  inL'ACTUALITE CHIMIQUE > N° 410 (09/2016) . - p. 23-26 Titre : Activation de molécules, de particules et de surfaces par cavitation acoustique Type de document : texte imprimé Auteurs : Sergueï Nikitenko, Auteur ; Tony Chave, Auteur ; Rachel Pflieger, Auteur ; Matthieu Virot, Auteur Année de publication : 2016 Article en page(s) : p. 23-26 Note générale : Bibliogr. Langues : Français (fre) Catégories : Catalyse Colloides Nanoparticules Sonochimie Sonoluminescence La sonoluminescence est le phénomène par lequel des photons sont émis par des bulles de gaz dont on fait varier le diamètre grâce à des ultrasons. Index. décimale : 534.5 Vibrations connexes. Ultrason, infrason Résumé : La cavitation acoustique observée dans les liquides soumis à des ultrasons de puissance conduit à des conditions extrêmes au sein des bulles, au moment de leur implosion, qui sont à l’origine de la réactivité chimique inhabituelle ainsi que d’une émission de lumière, connue sous le nom de sonoluminescence. En présence de gaz nobles, un plasma hors équilibre est formé à l’intérieur des bulles de cavitation. Les espèces chimiquement actives qui se forment dans les bulles sont capables de diffuser dans la phase liquide et de réagir avec les précurseurs en solution pour former de nouveaux produits. De nombreuses études révèlent les avantages des ultrasons pour activer les solides divisés et les surfaces étendues. Dans les systèmes hétérogènes, les effets mécaniques des ultrasons sont en général au moins aussi importants que les effets chimiques. Note de contenu : - Sonomuminescence - Sonocatalyse - Cavitation à l'interface solide-liquide Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27041 [article]

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Adding value to sheep leather via coating with green synthesised zinc oxide nanoparticles approaches for advanced leather products / M. A. Habib in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 106, N° 6 (11-12/2022)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 106, N° 6 (11-12/2022) . - p. 264-270 Titre : Adding value to sheep leather via coating with green synthesised zinc oxide nanoparticles approaches for advanced leather products Type de document : texte imprimé Auteurs : M. A. Habib, Auteur ; Neha Mulchandani, Auteur Année de publication : 2022 Article en page(s) : p. 264-270 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Allongement à la rupture Caractérisation Cuirs et peaux -- Analyse Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux de moutons Nanoparticules Oxyde de zinc Traction (mécanique) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Natural leather is the oldest fibre which has been used by man since early times. In recent times, interest has increased in introducing smart properties to natural leather, giving it practical and economic importance. Recently, finishing, the purpose of which is to produce different leather types to meet consumer requirements has become focused on giving the leather properties that make it an advanced material with smart applications. The aim of this work is to produce superior quality leather that would upgrade its value in performance via nano metal oxide treatment. This aim has been followed by synthesising zinc oxide nanoparticles via green chemistry which is then loaded into sheep leather. The structural and morphological properties of the synthesised zinc oxide nanoparticles have been investigated by SEM and XRD. The SEM, EDX, infrared spectroscopy (FTIR) study, and tensile properties determination were undertaken, to see if any significant structural or chemical differences could be detected between ʻuntreatedʼ and ʻtreatedʼ leather. From the various analyses, it was ascertained that the nanoparticles were successfully deposited on the leather surface. The study thus provides an eco-friendly method for zinc oxide nanoparticle synthesis which can then be utilised for finishing sheep leather for creating functional properties. Note de contenu : - MATERIALS AND METHODS : Materials - Methods - Incorporation of zinc oxide nanoparticles onto the leather surface - Leather characterisation - RESULTS : X-ray diffraction spectroscopy (XRD) analysis of zinc oxide nanoparticles - Scanning electron microscopy (SEM) analysis and EDX analysis - Fourier transform infrafred spectroscopy (FTIR) analysis - Tensile strength and elongation at break measurements - Table 1 : The functional groups in leather En ligne : https://drive.google.com/file/d/1MtOaZZGQq5HajPmRh9kzeIO8XijBc0qR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38519 [article]

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Advance of design and application in self-healing anticorrosive coating: a review / Shasha He in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 3 (05/2023) . - p. 819-841 Titre : Advance of design and application in self-healing anticorrosive coating: a review Type de document : texte imprimé Auteurs : Shasha He, Auteur ; Yijian Gao, Auteur ; Xinghou Gong, Auteur ; Chonggang Wu, Auteur ; Hongyu Cen, Auteur Année de publication : 2023 Article en page(s) : p. 819-841 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Encapsulation Nanoparticules Polymères Revêtement autoréparant Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : As a significant method to inhibit metal corrosion by blocking the diffusion of corrosive mediums to the metal surface, the anticorrosion coating with a self-healing function can actively repair a damaged structure and improve the anticorrosion performance to better meet actual needs. In this study, “external aid” and “intrinsic triggering” self-healing coatings have been introduced in detail, including the preparation method, healing mechanism and practical applications. The healing of “external aid” is based on the addition components such as microcapsules containing healing agents and functional nanoparticles, whose ability of self-healing shows the independence with the coating resin. But the finitely additive amount may limit the sustainable use of “external aid” components, and the abundant fillers also change the basic physical properties of the coating. On the contrary, the “intrinsic triggering” resins can form the cover layer in the defects owing to the physical or chemical reactions between the polymer chains, along with the unlimited cycles theoretically. By contrast, the small defects or gaps can be repaired gradually through chain reactions, but the large areas of damage may need the quick release of healing additives in “external aid” coating. In this review, the advances of two kinds of self-healing coatings were analyzed to discuss the advantages and disadvantages of various healing technologies, and the challenges of development and prospects were also forecasted to provide useful ideas. Note de contenu : - EXTERNAL SELF-HEALING COATING :Microcapsule-based self-healing coating - Hollow network self-healing coating - Nanomaterials filled system - INTRINSIC SELF-HEALING MATERIAL : Self-healing based on reversible covalent bonds - Self-healing based on reversible noncovalent bonds DOI : https://doi.org/10.1007/s11998-022-00735-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00735-6.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39431 [article]

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Advanced materials from microbial fermentation / Niki Baccile in L'ACTUALITE CHIMIQUE, N° 427-428 (03-04/2018)  

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Advanced nano-ceramic smart coatings / Steven Teo in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 200, N° 4554 (11/2010)  

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Advances in the science and technology of paints, inks and related coatings : 2006 / I. Holme in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B4 (12/2006)  

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Ag 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)  

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Ag 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)  

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Agglomerate-free compounding / Theresa Fischer in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 8 (08/2019)  

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Les agrégats, précurseurs des nanoparticules / Jacqueline Belloni in L'ACTUALITE CHIMIQUE, N° 348-349 (01-02/2011)  

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Alliages de thermoplastiques immiscibles polyéthylène/polyamide chargés de nanoparticules d'argile : relations structure-morphologie-rhéologie / Julien Ville in RHEOLOGIE, Vol. 16 (12/2009)  

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An approach to mimic nature by self-healing - a boon to achieve material durability / Trisha Kaushik in PAINTINDIA, Vol. LXXII, N° 9 (09/2022)  

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Analyse Raman in situ de la déformation d'un hydrogel nanocomposite / Maria Trouilh in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 24, N° 1 (01-02-03/2014)

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Analyse de trace, spéciation, électrophorèse capillaire, microsystèmes séparatifs, capteurs bioélectrochimiques nanostructurés / Bernard Coq in L'ACTUALITE CHIMIQUE, N° 338-339 (02-03/2010)

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Analysis of transparent conductive silver nanowire films from dip coating flow / Kwangguk Ahn in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 5 (09/2015)  

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Anti-melanoma, tyrosinase inhibitory and anti-microbial activities of gold nanoparticles synthesized from aqueous leaf extracts of Teraxacum officinale / C. O. Tettey in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 34, N° 2 (04/2012)  

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Antibacterial and antifungal properties of clear coating film containing silver-cytokinin complex as a filler / Fumihiko Ohashi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 6 (11/2020)  

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Anticorrosive behavior study by localized electrochemical techniques of sol–gel coatings loaded with smart nanocontainers / C. Zea in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 4 (07/2017)  

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