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A minimally invasive clinical model to test sunscreen toxicity based on oxidative stress levels using microbiopsy and confocal microscopy - a proof of concept study / Miko Yamada in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 42, N° 5 (10/2021)
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[article]
Titre : A minimally invasive clinical model to test sunscreen toxicity based on oxidative stress levels using microbiopsy and confocal microscopy - a proof of concept study Type de document : document électronique Auteurs : Miko Yamada, Auteur ; Lynlee L. Lin, Auteur ; Lydia Y. T. Hang, Auteur ; Paul J. Belt, Auteur ; H. Peter Soyer, Auteur ; Anthony P. Raphael, Auteur ; Tarl W. Prow, Auteur Année de publication : 2020 Article en page(s) : p. 462-470 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cosmétiques -- Toxicologie
Dermo-cosmétologie
Etude in vivo
Imagerie (technique)
Microscopie confocale
Nanoparticules
Oxyde de zinc
Peau -- Biopsie
Produits antisolairesIndex. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : This proof‐of‐concept study demonstrated that using minimally invasive skin microsampling could enable significantly higher throughput of cosmetic testing in volunteers than conventional biopsy. Nanoparticle sunscreen was used as a model to test toxicity based on oxidative stress using microbiopsy and confocal imaging.
- Methods : Six volunteers were recruited for this study (3 males and 3 females). Zinc oxide nanoparticle containing topical formulation was prepared at 10% w/v. Each volunteer had 3 areas of 4 cm2 each mapped on each inner forearm for a total of 6 treatment areas (intact/ tape-stripped and with/without treatment). The topical zinc-nanoparticle formulation was applied directly to volunteer skin (2mg/cm2) for 2 hrs. Microbiopsied tissue from each treatment group was stained for reactive oxygen and nitrogen species in addition to mitochondrial superoxide. The stained samples were then imaged using confocal microscopy prior to image analysis.
- Results : Skin exposed to zinc oxide nanoparticles did not show any significant increases in oxidative stress. Zinc oxide nanoparticle tape-stripped skin resulted in signal significantly lower (P < 0.001) oxidative stress levels than t-butylated hydroxytoluene treated tape-stripped skin for oxidative stress markers. Topically applied zinc oxide nanoparticles had no detectable effect on the oxidative status in volunteer skin. No adverse reactions or effects were observed after all treatments including microbiopsy.
- Conclusion : The data support the hypothesis that microbiopsy is a viable approach to study cosmeceutical- skin interactions in volunteers with capacity for molecular assays and high throughput with very low risk to the volunteer.Note de contenu : - Subjects
- Tape-stripping and trans-epidermal water loss (TEWL)
- Zinc oxide nanoparticle (ZnO-NP) preparation and administration
- Microbiopsy
- Reactive Oxygen and Nitrogen Species (CellROX) and Mitochondrial Superoxide (MitoSOX) Assessment
- Confocal laser microscopy
- Data analysis
- Table : Treatment groups as per 4 cm2 area marked out on the arm. Separation of arms A and B for the two solutions (ZnO-NP sunscreen and CCT) minimized cross-contaminationDOI : https://doi.org/10.1111/ics.12646 En ligne : https://drive.google.com/file/d/1AmsQAEOqV5ZhvAvSeVP8jkxFCki-1KE2/view?usp=shari [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35411
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 42, N° 5 (10/2021) . - p. 462-470[article]MODAFLOW NSR 100, a novel nanosilica additive for excellent scratch resistance / M. Goedegebuure in SURFACE COATINGS INTERNATIONAL, Vol. 104.3 (05-06/2021)
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[article]
Titre : MODAFLOW NSR 100, a novel nanosilica additive for excellent scratch resistance Type de document : texte imprimé Auteurs : M. Goedegebuure, Auteur ; M. P. E. Benjert, Auteur ; F. Fallani, Auteur ; E. de Wolf, Auteur Année de publication : 2021 Article en page(s) : p. 194-199 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Autobus -- Peinture
Essais de résilience
Essais dynamiques
Nanoparticules
Polyacryliques
Polyesters
Résistance à l'abrasion
Revêtements -- Additifs:Peinture -- Additifs
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 : While visual appearance represents one of the most important criteria when buying a car, an item of furniture or other life style object, surface robustness makes all the difference when it cornes to daily use, such as washing your car or polishing your home furniture.
High gloss appearance of automotive coatings, in fact, can be affected by micro-scratches, which are invisible to the naked eye, but result in a substantial loss of gloss because of a change in reflection of light (scattering), particularly visible on dark colours (basecoats) in the sunlight. Such scratches occur for instance because of (automatic) carwashes and are mainly due to dirt particles, not so much to the bristle hairs. The same dirt particles can also scratch the coating when driving and/or during harsh weather conditions, causing even more damage (wet vs. dry, or mar, scratching). Definitely, scratch resistance is a very important paint performance parameter for automotive coatings.
To improve the scratch and mar resistance properties of automotive, refinish and high-end industrial coatings, allnex has developed MODAFLOW® NSR 100, a nanosilica-based anti-scratch additive, compatible with high bake 1K and 2K paints as well as Fast Cure room temperature curing 2K isocyanate paints. MODAFLOW® NSR 100 offers best-in-class scratch and mar resistance at low dosage without affecting appearance, giving fully transparent (no haze) clearcoats, unlike other hard nanoparticle-based additives, which can often negatively affect coating appearance, causing lower gloss, increased haze and reduced levelling. MODAFLOW® NSR 100 is supplied as a 35% solution and has excellent compatibility with a broad range of acrylics and polyesters.Note de contenu : - Working principle
- MODAFLOW NSR 100 in 1K automotive OEM clearcoat
- MODAFLOW NSR 100 in 2K automotive OEM clearcoat
- MODAFLOW NSR 100 in fast cure-based 2K vehicle refinish clearcoat
- Fig. 1 : TEM micrograph showing enrichment of MODAFLOW NSR 100 at the coating-air interface
- Fig. 2 : Crockmeter
- Fig. 3 : Carwash tester
- Fig. 4 : Dry scratch resistance results (crockmeter) of 1K clearcoat reference without nanosilica vs. 1K clearcoat with MODAFLOW NSR 100
- Fig. 5 : Carwash resistance results of 1K clearcoat reference without nanosilica vs. 1K clearcoat with MODAFLOW NSR 100
- Fig. 6 : Wavescan results of 1K clearcoat reference without nanosilica vs. 1K clearcoat with MODAFLOW NSR 100 (magenta)
- Fig. 7 : Dry scratch resistance results (crockmeter) of 2K clearcoat reference without nanosilica vs. 2K clearcoat with MODAFLOW® NSR 100
- Fig. 8 : Wavescan results of 2K clearcoat reference without nanosilica vs. 2K clearcoat with MODAFLOW® NSR 100
- Fig. 9 : Dry scratch resistance (crockmeter) of formulations based on SETALUX® 1915 BA-75 (left) and SETALUX FC 1922 BA-75 (right) with and without MODAFLOW' NSR 100
- Fig. 10 : Picture of coated panels after crock test : Clearcoat based on SETALUX FC 1922 BA-75 without nanosilica and same clearcoat with MODAFLOW NSR 100
- Fig. 11 : Isocyanate conversion at room temperature, measured by Infrared Spectroscopy : Formulation based on SETALUX® FC 1922 BA-75 and on
SETALUX® 1915 BA-75 (both without nanosilica)
- Fig. 12 : Spider diagram summarising the advantages and special features of MODAFLOW° NSR 100 (properties improve from inside to outside of the hexagon)
- Table 1 : Performances of 1K clearcoats based on SETALUX® 1760 VB-64, with and without MODAFLOW NSR 100
- Table 2 : Performances of 2K clearcoats based on SETALUX 1767 VV-65, with and without MODAFLOW NSR 100
- Table 3 : Performances of 2K clearcoats based on SETALUX FC 1922 BA-75, with and withoutEn ligne : https://drive.google.com/file/d/1bRtUqErwpj4t4NUD-5pLXr9g72T7UeV1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36001
in SURFACE COATINGS INTERNATIONAL > Vol. 104.3 (05-06/2021) . - p. 194-199[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22826 - Périodique Bibliothèque principale Documentaires Disponible 22906 - Périodique Bibliothèque principale Documentaires Disponible Modern waterborne contact adhesive : 1K application with 2K property level / Peter Küker in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4632 (06/2017)
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Titre : Modern waterborne contact adhesive : 1K application with 2K property level Type de document : texte imprimé Auteurs : Peter Küker, Auteur ; Martin Melchiors, Auteur ; Winfried Jeske, Auteur ; Berta Vega Sánchez, Auteur Année de publication : 2017 Article en page(s) : p. 39-41 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésifs en phase aqueuse
Caoutchouc
Collage
Colles mono-composant:Adhésifs mono-composant
Formulation (Génie chimique)
Fusion, Points de
Nanoparticules
Pelage
Polychloroprène
Résistance thermique
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 : 668.3 Adhésifs et produits semblables Résumé : Waterborne systems, based on polychloroprene dispersions have proven to be suitable in replacing solventborne contact adhesives in many applications. In foam adhesives for furniture and mattress production, polychloroprene (CR) dispersions are gaining a share relative to traditional solventborne adhesives. One reason is that such waterborne adhesives can be formulated as one-component (1K) adhesives, combining the full wet adhesion potential offered by polychloroprene dispersions with the simple and reliable handling of 1K formulations, while fulfilling relevant requirements on VOC regulations.
An easy method to yield activated formulations through pH reduction, with improved wet tack properties for spray application on various substrates is presented. For rolling/brushing application, we show that the combination of polychloroprene, with selected nanosilica dispersions, creates a network structure providing significant improvements in the cohesive strength, as well as the heat resistance of the adhesive.Note de contenu : - Improving performance of wb contact adhesives by crosslinking with nanosilica sols
- Sprayable cr contact adhesives for foam bonding applications
- FIGURES : 1. Peel strength development of polychloroprene adhesive as a function of crystallisation - 2. Final peel strength and open time of solventborne vs waterborne polychloroprene contact adhesives on SBR rubber - 3. Softenng point of sb vs wb polychloroprene adhesives tested on SBR rubber - 4. Initial and final peel strength of sb vs wb polychloroprene adhesives ; wb formulation (Toolbox #2 #3) based on Dispercoll (C + Dispercoll S)En ligne : https://drive.google.com/file/d/1rImSNjYNlndhp2S3VAyRWpTBcKps5y8P/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28775
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 207, N° 4632 (06/2017) . - p. 39-41[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19040 - Périodique Bibliothèque principale Documentaires Disponible Modification of syndiotactic polypropylene with nano-calcium carbonate and halloysite / L. Pietrzak in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 3 (07/2018)
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Titre : Modification of syndiotactic polypropylene with nano-calcium carbonate and halloysite Type de document : texte imprimé Auteurs : L. Pietrzak, Auteur ; Ewa Piorkowska, Auteur ; A. Galeski, Auteur ; J. Bojda, Auteur ; P. Sowinski, Auteur Année de publication : 2018 Article en page(s) : p. 314-321 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Carbonate de calcium Le carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole.
C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots.
Charges (matériaux)
Composites thermoplastiques -- Propriétés mécaniques
HalloysiteL'halloysite-7Å est une espèce minérale du groupe des silicates sous-groupe des phyllosilicates de formule Al2Si2O5(OH)4 avec des traces de : Ti ; Ca ; Na ; K ; Fe ; Cr ; Mg ; Ni ; Cu. Ses principaux constituants, outre l'oxygène, sont l’aluminium (20,90 %), le silicium (21,76 %), et l’hydrogène (1,56 %).
Nanoparticules
Polymère syndiotactique
PolypropylèneIndex. décimale : 668.4 Plastiques, vinyles Résumé : Composites of syndiotactic polypropylene (sPP) with 5 to 17 vol.% of halloysite and 2.5 to 7.5 vol.% of stearic acid modified nano-calcium carbonate, having an average grain size of 80 nm, were prepared and examined. The effect of fillers on thermal properties of sPP was different; halloysite increased markedly peak crystallization temperature. The composites with the highest filler contents, 7.5 vol.% of calcium carbonate and 17 vol. % of halloysite, exhibited a solid-like behavior at 170 °C, with the storage modulus exceeding the loss modulus in the entire frequency range, that is 512 to 0.1 rad s−1. The composites with halloysite exhibited decreased Izod impact strength compared to neat sPP. On the contrary, 2.7 fold improvement of the impact strength was found for the composites with nano-calcium carbonate. Moreover, nano-calcium carbonate did not worsen the drawability of the materials during uniaxial drawing. It was found that debonding at calcium carbonate/sPP interface occurred both during the impact test and tensile drawing facilitating the plastic deformation of the polymer. DOI : 10.3139/217.3521 En ligne : https://drive.google.com/file/d/1VlpFWjhb1lX464pDwyUCbpUHWyT4yWCL/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30799
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXIII, N° 3 (07/2018) . - p. 314-321[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20044 - Périodique Bibliothèque principale Documentaires Disponible Modifying of UHMWPE fishing nets with layer-by-layer deposition method for antifouling properties / Gülsah Ekin kartal in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)
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Titre : Modifying of UHMWPE fishing nets with layer-by-layer deposition method for antifouling properties Type de document : texte imprimé Auteurs : Gülsah Ekin kartal, Auteur ; Ayse Merih Sarusik, Auteur Année de publication : 2021 Article en page(s) : p. 163-171 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Borate de zinc
Caractérisation
Cationisation
Couches minces multicouches
Filets de pêche
Formation de film
Nanoparticules
Oxyde de cuivre
Oxyde de zinc
Polyéthylène à ultra haut poids moléculaire
Polyéthylèneimine
Revêtement monocouche
Revêtements antisalissuresIndex. décimale : 667.9 Revêtements et enduits Résumé : The nanoparticles-based, multilayer, nanocomposite films ZnO, Cu2O, zinc borate, and Econea® were fabricated on cationized ultra-high molecular weight polyethylene (UHMWPE) fishing nets using a layer-by-layer molecular self-assembly technique. For the cationic surface charge, the UHMWPE fishing nets were pretreated with polyethyleneimine using the dip-coating method. Scanning electron microscopy and energy-dispersive X-ray spectroscopy were used to examine the nano-ZnO, Cu2O, zinc borate, and Econea® multilayer films deposited on the fishing nets. The fishing nets were placed in a fish farm located in the Aegean Sea for 6 months. The nano-Econea® films exhibited excellent antifouling activity against microorganisms. To evaluate the effect of the process on antifouling properties, physical tests of the nets were conducted before and after the nanoparticle treatment. The strength of the nets and fouling organisms were examined after the field study. Note de contenu : - EXPERIMENTAL : Materials - Cationization process - Nano-multilayer film formation - Characterization
- RESULTS AND DISCUSSION : Characterization - Fieldwork - Macro-organisms analysis - Solidity of nets - Strength and weight analysis
- Table 1 : Percentage of elemental contents of fishing nets deposited with 16-multilayer nanomaterial films
- Table 2 : Solidity of biofouled fishing nets
- Table 3 : Weighting results of fishing nets deposited with 16-multilayer nanomaterial films before and after the field
- Table 4 : Strength and elongation values of fishing nets deposited with 16-multilayer nanomaterial filmsDOI : https://doi.org/10.1007/s11998-020-00392-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00392-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35360
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 1 (01/2021) . - p. 163-171[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22605 - Périodique Bibliothèque principale Documentaires Disponible A Monte Carlo determination of the effectiveness of nanoparticles as spacers for optimizing [TiO.sub.2] opacity / Michael P. Diebold in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 5 (10/2011)
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PermalinkMorphology and properties of unvulcanized and dynamically vulcanized PVC/NBR blend reinforced by graphene nanoplatelets / Z. Asgarzadeh in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 4 (08/2018)
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PermalinkMorphology influence of nanoporous nickel phosphate on intumescent flame retardant polypropylene composites / S.-B. Nie in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 4 (08/2018)
PermalinkMultifunctional coating based on nano fillers and natural substances / Roberto Cafagna in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 208, N° 4647 (12/2018)
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PermalinkMultifunctional composites / Christof Hübner in KUNSTSTOFFE INTERNATIONAL, Vol. 104, N° 1 (01/2014)
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PermalinkMultinozzle electrospray method for high-throughput and uniform coating : Application of superhydrophobic coating / Md. Abu Mosa in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)
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PermalinkLes multiples facettes des nanomatériaux carbonés / Emmanuel Flahaut in L'ACTUALITE CHIMIQUE, N° 417 (04/2017)
PermalinkPermalinkPermalinkNano from nature ! / Hoffmann Mineral GmbH (Neubourg, Germany) in SURFACE COATINGS INTERNATIONAL, Vol. 96, 5 (11/2013)
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PermalinkNano from nature ! / Alexander Risch in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 196, N° 4507 (12/2006)
PermalinkNano keeps water and dirt at bay / Ivan Cabrera in EUROPEAN COATINGS JOURNAL (ECJ), N° 3/2011 (03/2011)
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PermalinkNano-pigments for megaprints / Hans-Tobias Macholdt in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 198, N° 4527 (08/2008)
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PermalinkNano-SiO2-oxazolidine combination tannage-potential for chrome-free leather / Lu Yan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 6 (11-12/2008)
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PermalinkNano-TiO2/organic fluorine polyacrylate emulsion coating for leather in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 105, N° 2 (03-04/2021)
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