Cu2O-clay composites with sub-micrometer-sized Cu2O particles for marine antifouling paints / Pengchong Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 1 (01/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 1 (01/2019) . - p. 25-30 Titre : Cu2O-clay composites with sub-micrometer-sized Cu2O particles for marine antifouling paints Type de document : texte imprimé Auteurs : Pengchong Li, Auteur ; Yuhua Long, Auteur ; Chao Cai, Auteur ; Tang Zhu, Auteur ; Haixia Dong, Auteur ; Caizhen Zhu, Auteur ; Ning Zhao, Auteur ; Jian Xu, Auteur Année de publication : 2019 Article en page(s) : p. 25-30 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argile Marines (peinture) Oxydes de cuivre Revêtements antisalissures:Peinture antisalissures Taille des particules Index. décimale : 667.9 Revêtements et enduits Résumé : Microsized Cu2O particles are widely used in tin-free marine antifouling (AF) paints. Because of the enlarged specific surface area, utilization of Cu2O particles with smaller sizes is a potential way to improve the AF efficiency and lower the Cu2O content. In this paper, the clay, commonly applied as filler in the paint, was previously used to control the concentration of free Cu2+ during the synthesis of Cu2O. With the help of clay, the size of obtained Cu2O particles decreased from 750 to 460 nm. It has been shown that the smaller-sized Cu2O can work against the marine biofouling with a lower content (15 wt%) compared to the commercial microsized Cu2O (40 wt%) in the 260 days of marine AF field tests. DOI : 10.1007/s11998-018-0087-y En ligne : https://link.springer.com/article/10.1007/s11998-018-0087-y Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31961 [article]

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In vitro bactericidal effect of ultrasonically sol–gel-coated novel CuO/TiO2/PEG/cotton nanocomposite for wound care / Arman Khani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 3 (05/2017)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 3 (05/2017) . - p. 651-663 Titre : In vitro bactericidal effect of ultrasonically sol–gel-coated novel CuO/TiO2/PEG/cotton nanocomposite for wound care Type de document : texte imprimé Auteurs : Arman Khani, Auteur ; Nasrin Talebian, Auteur Année de publication : 2017 Article en page(s) : p. 651-663 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens Citrique, Acide L'acide citrique est un acide alpha hydroxylé de formule C6H8O7. Il joue un rôle central dans le métabolisme de tous les organismes vivants et tient son nom de son origine; le citron. L'acide citrique est biodégradable et n'est pas toxique pour l'homme ni pour l'environnement. Cependant, comme tout acide, il est irritant et peut provoquer des brûlures s'il entre en contact prolongé avec des muqueuses. À pH physiologique, il est présent sous forme de sa base conjuguée, le citrate, qui est un chélateur de l'ion calcium dans le sang. Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Dioxyde de titane Matériaux hybrides Nanoparticules Oxydes de cuivre Polyéthylène glycol Sol-gel, Procédé Sonochimie Surfaces fonctionnelles Textiles et tissus à usages médicaux Textiles et tissus à usages techniques Traîtements de surface Ultrasons Index. décimale : 667.9 Revêtements et enduits Résumé : Protection against bacterial contamination remains a demand for healthcare textiles such as wound dressings to reduce or eliminate hospital-acquired infections related to antibiotic-resistant bacteria. We report herein a simple and straightforward in situ approach to deposit copper oxide and titanium oxide nanoparticles onto cotton fabric using a sonochemical-mediated sol–gel method. Modification of the cotton surface was achieved by incorporation of citric acid (CA) and polyethylene glycol (PEG) to improve the attachment of the nanoparticles and reduce the attachment of bacteria to the cotton surface, respectively. The resultant cotton fabric was used against Escherichia coli as a Gram-negative bacterium and Staphylococcus aureus as a Gram-positive bacterium in dark condition as an in vitro model for treatment of bacterial wound infection. The effects of different treatment parameters including duration and frequency of ultrasonic irradiation, surface modification with PEG and/or CA, and cotton chemical composition with different metal oxide molar ratios on the antibacterial activity of the treated cotton fabric were studied. All treated cotton fabrics showed antibacterial activity, with higher efficiency for those coated with CuO or CuO/TiO2 (1:1 molar ratio) among the single metal oxide and composite-modified cotton fibers, respectively. Our results show that such functionalized cotton fibers could actively fight the spread of bacterial infections by preventing bacterial adhesion, enabling more efficient bonding, and ultrasonically promoting generation of nanoparticles and their strong adhesion to the fabric surface. Note de contenu : - EXPERIMENTAL : Materials - Sol preparation and application onto cotton fabric - Characterization - Microbiological tests - Agar diffusion test - Dynamic shake tests - Washing durability test - RESULTS AND DISCUSSION : Structural and morphological characterization - Antibacterial activity DOI : 10.1007/s11998-016-9870-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9870-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28573 [article]

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Nanotechnology in the construction industry (Part - 2) / Harish Agrawal in PAINTINDIA, Vol. LXX, N° 10 (10/2020)  

[article]  inPAINTINDIA > Vol. LXX, N° 10 (10/2020) . - p. 111-116 Titre : Nanotechnology in the construction industry (Part - 2) Type de document : texte imprimé Auteurs : Harish Agrawal, Auteur Année de publication : 2020 Article en page(s) : p. 111-116 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Construction -- Matériaux Dioxyde de silicium Dioxyde de titane Lubrifiants Matériaux cimentaires -- Revêtements protecteurs Nanoparticules Nanotechnologie Nanotubes Oxyde de fer Oxydes de cuivre Revêtements:Peinture Index. décimale : 620.13 Matériaux de construction : pierre, ciment, béton, liants de Résumé : Nanotechnology is a very active research area all over the world. The two initial areas of research deals with the understanding of the hydration of cement particles and the use of nano-size silica particles. Definitions are important because they allow that a topic can be discussed without misunderstandings. When talking about Nano and sol gel technology this seems to be especially important, because nanotechnology is not a scientific field on its own, but rather a conglomerate of almost all scientific disciplines, ranging from chemistry and physics over materials science to e.g. medicines, coatings, construction chemicals. Note de contenu : - Nano-coatings for concrete : Specific parameters - Mechanism - heat reflective mechanism - Nanotechnology other applications : Nanocomposites - Applications of nanocomposites - Nanoclays - Tougher and harder cutting tools - Nanopaints - Nanolubricants - Which nanomaterials are used in construction (Carbon nanotubes - Silicon dioxide, titanium dioxide, iron oxide, copper and silver nanoparticles) - Quantum dots - Fig. 1 : Clay structure of clay minerals Type 1:1 and Type 2:1 - En ligne : https://drive.google.com/file/d/1vKTy6FZCA57bwBnfRuTKYbooJEPWyvOq/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34672 [article]

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SMS improves anti-fouling performance in cuprous oxide-based coatings / Michael Guenther in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 208, N° 4645 (10/2018)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 208, N° 4645 (10/2018) . - p. 39-41 Titre : SMS improves anti-fouling performance in cuprous oxide-based coatings Type de document : texte imprimé Auteurs : Michael Guenther, Auteur ; Sascha Herrwerth, Auteur ; Katrin Roland ; Maria Nargiello Année de publication : 2018 Article en page(s) : p. 39-41 Langues : Anglais (eng) Catégories : Durée de vie (Ingénierie) Dureté (matériaux) Formulation (Génie chimique) Marines (peinture) Oxydes de cuivre Revêtements antisalissures:Peinture antisalissures Silice fumée Sulfate de baryum Index. décimale : 667.9 Revêtements et enduits Résumé : Structure modified, nanostructured synthetic fumed silica technology was introduced more than a decade ego for improving scratch resistance and mechanical strength across coatings and adhesives/sealant industry fields. New developments now create a novel design, which offers environmentally sustainable improvement to anti-fouling performance in marine environments. This paper addresses how the use of select, tailor¬made structure modified fumed silice technology (SMS) formulated synergistically with copper oxide (Cu20) improves the antifouling behaviour and life-cycle performance of antifouling coatings. Supporting mechanical stability results will show how technology helps reinforce film properties. A brief review of the model to explain the positive effects of structure modified fumed silice in Cu20 based antifouling coatings will be presented. Specific performance enhancements of increased film stability and a reduced leaching of copper ions will be addressed. Note de contenu : - Fumed silica particle design capability and flexibility - Experimental test protocol : Formulation - Application - Fig. 1 : Copper oxide dispersion with and without SMS. Cu20 dispersion without SMS and Cu20 dispersion with 10% SMS - Fig. 2 : Key elements of structure modification - Fig. 3 : Performance of Btank and References 1 and 2 - Fig. 4 : Performance of Btank, References 1 and 2 combined with SMS and Cu20 - Fig. 5 : Performance of Blank, References 1 and 2 combined with SMS and barium sulphate - Fig. 6 : Demonstration of use of SMS allows significant reduction of copper oxide - Fig. 7 : Biomass accumulation after test period - Fig. 8 : Model of sustainable 'visibility' of copper oxide with SMS - Fig. 9 : Martens Hardness increases with use of SMS En ligne : https://drive.google.com/file/d/1JyQukvOL21ygGK514Z3iGRnN2auYRtN5/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31255 [article]

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Structural and antibacterial properties of PP/CuO composite filaments having different cross sectional shapes / Sukran Kara in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 4 (08/2016)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXXI, N° 4 (08/2016) . - p. 398-409 Titre : Structural and antibacterial properties of PP/CuO composite filaments having different cross sectional shapes Type de document : texte imprimé Auteurs : Sukran Kara, Auteur ; M. E. Ureyen, Auteur ; U. H. Erdogan, Auteur Année de publication : 2016 Article en page(s) : p. 398-409 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antibactériens Fibres textiles synthétiques Matériaux -- Propriétés fonctionnelles Oxydes de cuivre Polypropylène Index. décimale : 668.4 Plastiques, vinyles Résumé : Textile scientists make researches for producing new types of fibers as well as modifying the existing fibers to provide new raw materials for technical textile applications. The easiest way of modifying fiber physical properties is to change the cross sectional shape of a synthetic fiber. Also, composite fibers loaded with different kinds of additives attracted the attention of researchers in the last decades for functionalizing fibers. Some other methods like coating, exhausting, padding or other novel methods can be used for the same purpose. But in these methods, the functional effect is generally not durable enough against several times of washing and abrasion. Also, these methods usually require higher consumption of water and heat when compared to composite fiber production. As a result, in this work the effect of cross sectional modification and composite fiber production were combined in the same fiber. One of the most important functional properties which can be provided by composite fiber production is antibacterial activity. Only a few research papers were published on antibacterial additive doped polypropylene fibers. In this work cupric oxide (CuO) doped antibacterial composite polypropylene (PP) fibers having different cross sectional shapes (circular, trilobal and triangular) were produced and the effect of cross sectional shape and CuO on the antibacterial activity, structural and mechanical properties of the fibers were investigated for the first time. Cross sectional and longitudinal images of composite fibers were evaluated by using optical microscope and scanning electron microscope (SEM). As the released content of active agent is an important parameter for the activity, durability, environmental and health effect of the product, the copper release from the fibers into the water media was investigated by inductively coupled plasma optical emission spectrometry (ICP-OES). Thermal analysis results showed that PP/CuO composite filaments having three different cross sectional shapes can be produced without any significant changes on thermal behavior of fibers. With the increasing content of cupric oxide, tenacities of fibers slightly decreased. Cupric oxide particles also led to some crystallinity changes. All of the composite fibers showed good antibacterial activity against Gram-negative bacterium Escherichia coli. Note de contenu : - Fiber cross section and surface properties - Structural behaviors - Tensile properties - ICP-OES test results - Copper release test results - Antibacterial activity test results DOI : 10.3139/217.3159 En ligne : https://drive.google.com/file/d/13g3oOpBsqbWMnXfc1AR0CuDrtfitOEoe/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26802 [article]

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Synthèse des xanthates de cellulose et utilisation comme agents pour la séparation de fines particules de minerais oxydés de cuivre / Hossein Nematollahi / 1978

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Validating eco-friendly claims / Araceli Q. Adrias in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 200, N° 4550 (07/2010)

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