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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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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An investigation on usage of sodium borohydride and zinc oxide as oxygen scavengers in polyethylene terephthalate films / Ilhan Özen in INTERNATIONAL POLYMER PROCESSING, Vol. XXVII, N° 4 (08/2012)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXVII, N° 4 (08/2012) . - p. 493-497 Titre : An investigation on usage of sodium borohydride and zinc oxide as oxygen scavengers in polyethylene terephthalate films Type de document : texte imprimé Auteurs : Ilhan Özen, Auteur Année de publication : 2012 Article en page(s) : p. 493-497 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Borohydrure de sodium Le tétrahydruroborate de sodium, aussi appelé borohydrure de sodium, est un composé chimique constitué d'atomes de bore, de sodium et d'hydrogène. Sa formule brute est NaBH4. C'est un agent réducteur utilisé notamment dans l'industrie pharmaceutique en tant que source d'hydrures H-. C'est un solide blanc, souvent rencontré sous forme de poudre. Le borohydrure de sodium absorbe l'humidité de l'air (il est hygroscopique). Il réagit avec l'eau et dégage lentement du dihydrogène, un gaz inflammable/explosif. Selon la classification européenne des produits chimiques, il est enregistré avec la phrase de risque R14 "réagit violemment au contact de l'eau". Le produit se décompose à plus de 400 °C sans fondre. Sa décomposition est violente et exothermique avec l'eau. Capteurs (technologie) Films plastiques Matériaux -- Propriétés barrières Matières plastiques -- Extrusion:Polymères -- Extrusion Oxyde de zinc Oxygène Polyéthylène téréphtalate Index. décimale : 668.9 Polymères Résumé : The aim of this work is the production and characterisation of a plastic film having active oxygen barrier properties. The films have been obtained by adding an oxygen scavenger (either sodium borohydride (NaBH4) or zinc oxide (ZnO)) into a polyethylene terephthalate (PET) matrix during the extrusion process. In order to investigate the activity of the scavengers used, the produced films have been subjected to permeability measurements. It was revealed that NaBH4 – though a strong reductive agent – didn’t cause any degradation in matrix polymer but served as an ineffective oxygen scavenger as in the case of ZnO. DOI : 10.3139/217.2613 En ligne : https://drive.google.com/file/d/1MENbIXiAdGFiyS-MPffEdVC0bzu3w09T/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15773 [article]

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Anticorrosion and barrier properties appraisal of poly(dimethylsiloxane)–ZnO nanocoating transition from superhydrophobic to hydrophobic state / Innocent O. Arukalam in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 4 (07/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 4 (07/2019) . - p. 1077-1088 Titre : Anticorrosion and barrier properties appraisal of poly(dimethylsiloxane)–ZnO nanocoating transition from superhydrophobic to hydrophobic state Type de document : texte imprimé Auteurs : Innocent O. Arukalam, Auteur ; Ying Li, Auteur Année de publication : 2019 Article en page(s) : p. 1077-1088 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Hydrophobie Matériaux -- Propriétés barrières Mouillabilité Oxyde de zinc Revêtements protecteurs Test d'immersion Index. décimale : 667.9 Revêtements et enduits Résumé : The anticorrosion and barrier properties of poly(dimethylsiloxane) (PDMS)–ZnO nanocoating transition from superhydrophobic to hydrophobic state have been evaluated. The main objective was to appraise the durability performance of anticorrosion and barrier properties of the pristine superhydrophobic coating and its hydrophobic state after long-term exposure to marine water. Thus, water wettability, surface features, and corrosion resistance, as well as barrier performance of the 1H, 1H, 2H, 2H-perfluorodecyltrichlorosilane-modified PDMS–ZnO coating were evaluated after 15 cycles (1 h to 60 days) of immersion in 3.5 wt.% NaCl solution. The evaluations were made by use of surface analytical, physicochemical, and electrochemical techniques. The results show that the coating transformed from superhydrophobic state (after 1 h) to hydrophobic state (after 60 days). The transition was due to effect of corrosiveness of the salty water and disappearance of the surface air layer with consequent reduction in the surface roughness and increase in the porosity of the coating. Correspondingly, the value of the impedance modulus decreased from 4.257 × 109 Ω cm2 (after 1 h) to 7.175 × 108 Ω cm2 (after 60 days). The trend of coating film (Rcf) and charge transfer (Rct) resistances with immersion time was found to be somewhat stable after 40-day immersion time. The observed high values of impedance modulus (|Z|f=0.01 Hz), Rcf and Rct after 60 days of immersion clearly demonstrate that the anticorrosion property and barrier performance of the transformed hydrophobic PDMS–ZnO coating were good. Note de contenu : - Wettability results of the coating - Results of surface microstructure and roughness of the coating - Chemical composition of the superhydrophobic PDMS-ZnO nanocoating - Electrochemical impedance spectroscopy (EIS) results - Effect of wetting and immersion time on the anticorrosion behavior of the coating DOI : 10.1007/s11998-018-00182-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-00182-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32863 [article]

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Antimicrobial surface coating as a pathway to curb resistance : preparation, mode of action and future perspective / Vincent Ngunjiri Mwangi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 3 (05/2024) . - p. 799-810 Titre : Antimicrobial surface coating as a pathway to curb resistance : preparation, mode of action and future perspective Type de document : texte imprimé Auteurs : Vincent Ngunjiri Mwangi, Auteur ; Edwin Shigwenya Madivoli, Auteur ; Mourine Kangogo, Auteur ; Sammy Indire Wanakai, Auteur ; Walyambillah Waudo, Auteur ; Dennis Mwanza Nzilu, Auteur Année de publication : 2024 Article en page(s) : p. 799-810 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alumine Antimicrobiens Argent Chaux Inhibition microbienne Nanoparticules Oxyde de cérium Oxyde de cuivre Oxyde de magnésium L'oxyde de magnésium, communément appelé magnésie, a pour formule MgO et se présente sous la forme de poudre blanche très fortement basique absorbant l'eau et le dioxyde de carbone présents dans l'atmosphère. STRUCTURE : L'oxyde de magnésium est un cristal ionique. L'oxyde de magnésium a une structure comparable à celle du chlorure de sodium7. Cela se traduit par Un réseau d'anion oxygène formant une structure de type cubique à faces centrées Un réseau de cation magnésium occupant l'ensemble des sites octaèdriques. L'oxyde de magnésium est un matériau modèle des cristaux ioniques car la faible électronégativité du magnésium, et la forte électronégativité de l’oxygène font que la structure de l’oxyde de magnésium peut s’expliquer quasi uniquement grâce à des interactions entre des particules ponctuelles chargées 10. La surface de l'oxyde de magnésium la plus stable dans le vide est obtenue en réalisant une coupe selon le plan cristallographique (100). Les particules d'oxyde de magnésium produites par combustion du magnésium métallique présentent d'ailleurs une forme cubique révélatrice de la présence de ces plans. Néanmoins, en présence d'eau, la surface de l'oxyde de magnésium est couverte d'ions hydroxyles qui stabilisent les plans (111) PRODUCTION : La majeure partie de l'oxyde de magnésium est actuellement obtenue soit à partir de carbonate de magnésium MgCO3 qui constitue certains minéraux tels que la magnésite, soit à partir de chlorure de magnésium que l'on extrait de l'eau de mer ou de saumures souterraines. Oxyde de titane Oxyde de zinc Oxydes métalliques Résistances aux antibiotiques Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : Antimicrobial resistance has proven to be an existential threat that endangers the health of human beings. The ease of accessing conventional antibiotics, and their unlimited and unregulated use and often misuse is seen to be a contributing factor to the rise in the resistance of microbes toward medications. The overuse of these medications in the agricultural sector also adds to the rising burden of antibiotic resistance. In line with efforts to counter the threat of antimicrobial resistance and the menace of hospital acquired infections developing antimicrobial surface coatings that can eliminate microbes that get deposited on those coatings is essential. This review aims to bring an understanding of antimicrobial resistance mechanisms, the preparation and mode of action and the future perspective of the antimicrobial surface coatings. Note de contenu : - ANTIBIOTIC RESISTANCE MECHANISMS - NANOPARTICLES AS ANTIMICROBIAL SURFACE COATINGS : Silver nanoparticles - Titanium oxide nanoparticles - Zinc oxide nanoparticles - Copper oxide nanoparticles - Magnesium oxide nanoparticles - Calcium oxide nanoparticles - Cerium oxide nanoparticles - Aluminum oxide nanoparticles - Bimetallic oxide nanoparticles - Table 1 Antimicrobial metal nanoparticles, microorganisms they inhibit and zones of inhibition DOI : https://doi.org/10.1007/s11998-023-00879-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00879-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41060 [article]

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Application of nanometre materials in modifying acrylate latex / Yilu Gong in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 209, N° 4651 (05/2019)  

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Artists' paints innovation focuses on environmental health, while maintaining quality / Sarah Gibbons in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 208, N° 4647 (12/2018)  

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Assessment of UV-permeability in nano-ZnO filled coatings via high throughput experimentation / Michael S. Lowry in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 2 (06/2008)  

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A balanced approach for formulating sunscreen products using zinc oxide / Edward Bartholomey in SOFW JOURNAL, Vol. 142, N° 3 (03/2016)  

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Biosynthesis of ZnO nanoparticles and effect of silver doping in gas sensing characteristics of volatile organic compounds / Anil Kumar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)  

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Characterization of the dispersion of tetrapod-like nano-ZnO whiskers in acrylic resin and properties of the nano-composite coating system / Hua Lei in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 1 (01/2010)  

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Characterization of water-repellent and corrosion-resistant superhydrophobic surfaces on galvanized steel in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 6 (11/2020)  

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Characterizing titanium dioxide and zinc oxide nanoparticles in sunscreen spray / P. J. Lu in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 37, N° 6 (12/2015)  

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Chemico-physical and functional properties of inorganic sunscreens in cosmetic products / Alessandra Semenzato in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 16, N° 6 (12/1994)  

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Coating of modified ZnO nanoparticles on cotton fabrics for enhanced functional characteristics / Muhammad Usman Munir in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)  

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Combinatorial coating based on light-sensitive photocatalysts - biostatic, self-cleaning and UV protective textiles / Omid Etemad-Parishanzadeh in TECHNICAL TEXTILES, Vol. 65, N° 4 (10/2022)  

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Commonly used UV filter toxicity on biological functions : review of last decade studies / Elodie Gilbert in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 35, N° 3 (06/2013)  

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Control of microorganisms on tanned leather : from fungicide to antimicrobial function leather / Haibin Gu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 2 (02/2016)  

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Corrosion protective pigments : their efficiency in organic and waterborne primers / Thadeus Schauer in EUROPEAN COATINGS JOURNAL (ECJ), N° 3/97 (03/1997)

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Cost-effective pigmentation in alkyd primers for steel : barrier anti-corrosion mechanism / William C. Johnson in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 66, N° 831 (04/1994)

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