Characterization of colloidal particles formed in plastic coating solution at room temperature / Yasuhiro Matoba in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 5 (09/2020) . - p. 1343–1349 Titre : Characterization of colloidal particles formed in plastic coating solution at room temperature Type de document : texte imprimé Auteurs : Yasuhiro Matoba, Auteur ; Ryo Akao, Auteur ; Masaki Nakazawa, Auteur ; Hideyo Ando, Auteur ; Shigeru Tasaka, Auteur Année de publication : 2020 Article en page(s) : p. 1343–1349 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Colloides Lumière -- Diffusion Méthyltriméthoxysilane Revêtement en plastique Spectrométrie infrarouge Index. décimale : 667.9 Revêtements et enduits Résumé : The structure of solution of methyltrimethoxysilane (MTMS), which is used for hard coating for plastic materials through its sol–gel reactions, was investigated by light scattering, atomic force microscopy, infrared spectroscopy, and X-ray diffraction. Although hard films can be formed only after heating the MTMS solution and no significant increase in viscosity can be found at room temperature, colloidal particles were detected in the solution by light scattering immediately after adding the catalyst. Particles with a size comparable to that determined by light scattering were observed by atomic force microscopy. The change induced by the growth of the particles was measured for 4 weeks. The infrared spectroscopy and X-ray diffraction for the solutions changed gradually, which supports the formation and growth of the colloidal particles. These results indicate a very slow reaction of MTMS and structural change in the solution even at room temperature, which can affect successful coating of plastic materials using MTMS. DOI : https://doi.org/10.1007/s11998-020-00355-y En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00355-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34577 [article]

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Characterizing the wet performance of latex adhesives / Philip Rolfe in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 17, N° 2 (02/2010)  

[article]  inADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 17, N° 2 (02/2010) . - p. 35-37 Titre : Characterizing the wet performance of latex adhesives Type de document : texte imprimé Auteurs : Philip Rolfe, Auteur Année de publication : 2010 Article en page(s) : p. 35-37 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cisaillement (mécanique) Colles:Adhésifs Latex Lumière -- Diffusion Potentiel zeta Rhéologie Taille des particules Viscosité Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Effectively formulating a latex adhesive requires knowledge of the material’s rheological response during normal use. In storage, the adhesive is subject only to gravitational force, a very low-stress condition. During application, however, high shear rates are applied. To meet performance targets, formulators tailor the adhesive’s viscosity profile (how viscosity changes with shear) by varying particle size, size distribution or solids loading. An optimal profile delivers a stable product with excellent transfer properties. This article considers three complementary analytical techniques that provide the information needed for optimal performance : dynamic light scattering, zeta potential and rotational rheometry. Note de contenu : - Defining optimal performance - Factors that influence adhesive behavior : High shear viscosity - Solids loading - Zeta potential - Particle size distribution - Case study : characterizing the performance of three adhesives -FIGURES : 1. The potential of a particle at increasing distance from the surface - 2. Viscosity vs. shear rate profiles of samples - 3. Close-up of high shear viscometry data 5000-200 000 s-1 - 4. Particle size results measured by dynamic light scattering - TABLES En ligne : http://www.adhesivesmag.com/articles/88830-characterizing-the-wet-performance-of [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25886 [article]

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Chromatographie d’exclusion stérique multi-détection / Luc Picton in L'ACTUALITE CHIMIQUE, N° 422-423 (10-11/2017)

[article]  inL'ACTUALITE CHIMIQUE > N° 422-423 (10-11/2017) . - p. 59-64 Titre : Chromatographie d’exclusion stérique multi-détection : détermination des grandeurs macromoléculaires Type de document : texte imprimé Auteurs : Luc Picton, Auteur ; Didier Le Cerf, Auteur Année de publication : 2017 Article en page(s) : p. 59-64 Note générale : Bibliogr. Langues : Français (fre) Catégories : Chromatographie sur gel Lumière -- Diffusion Polymères Viscosimétrie Index. décimale : 668.9 Polymères Résumé : Cet article présente le principe et les applications de la chromatographie d’exclusion stérique pour la caractérisation de polymères en solution et décrit l’intérêt d’utiliser des détecteurs spécifiques en sortie d’élution, à savoir la diffusion de la lumière statique multi-angle, la diffusion quasi élastique de la lumière et la viscosimétrie. Ces détecteurs permettent de s’affranchir d’un étalonnage et d’obtenir des informations sur la taille et la conformation des chaines polymères en solution via les rayons de giration et hydrodynamique. Note de contenu : - POLYMERES EN SOLUTION - CHROMATOGRAPHIE D'EXCLUSION STERIQUE - MULTI-DETECTION : Couplage SEC/MALS - Couplage SEC/MALS/QELS - Couplage SEC/MALS/viscosimétrie - FIGURES : - 1. Différents types de conformation de macromolécules en solution - 2. Principe de l’exclusion stérique - 3. Représentation schématique de la cellule de mesure de diffusion de la lumière multi-angle en ligne - 4. Couplage SEC/MALS de la gomme arabique en solution aqueuse à 5 g/L en milieu NaCl 0,1 mol/L (figure 4a, en rouge : signal LS à 90° ; en bleu : signal RDI) - 5. Couplage SEC/MALS : distribution des masses molaires (a) et des rayons de giration (b) de la gomme arabique en solution aqueuse à 5 g/L en milieu NaCl 0,1 mol/L (trait plein : signal LS à 90° ; trait pointillé : signal RDI) - 6. Couplage SEC/MALS/QELS : distribution des Rh de la gomme arabique en solution aqueuse NaCl 0,1 mol/L à 5 g/L (trait plein : signal LS ; trait pointillé : signal RDI) - 7. Couplage SEC/MALS/viscosimétrie, distribution des [η] (a) et des Rh (b) du CMP en solution aqueuse NaCl 0,1 mol/L - 8. Couplage SEC/MALS/viscosimétrie, relation de Mark-Houwink du CMP en solution aqueuse NaCl 0,1 mol/L Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29217 [article]

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Deep skin homogeneity and light diffusion : An accelerated Monte Carlo model for in vivo skin characterization and consumer perception / Germain Puccetti in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 46, N° 3 (06/2024)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 46, N° 3 (06/2024) . - p. 368-379 Titre : Deep skin homogeneity and light diffusion : An accelerated Monte Carlo model for in vivo skin characterization and consumer perception Type de document : texte imprimé Auteurs : Germain Puccetti, Auteur Année de publication : 2024 Article en page(s) : p. 368-379 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Consommateurs -- Attitudes Cosmétiques Dermo-cosmétologie Justification de l'allégation Lumière -- Diffusion Modèles numériques Monte-Carlo, Méthode de Peau Peau -- Perception visuelle Peau -- Soins et hygiène Vieillissement cutané Index. décimale : 668.5 Parfums et cosmétiques Résumé : The appearance of healthy and youthful skin is related to many factors of the skin optical properties as perceived by our visual sense. The optics of light travelling through human tissues has been extensively investigated in the field of biomedical applications, including the experimental characterization and modelling of skin optics and the propagation of light such as lasers through the layers. This work presents an innovative approach to probe deep skin by means of spectrally and spatially resolved light diffusion in the different layers of skin. Dual hyperspectral measurements of the panellist's skin are performed in vivo on subjects to obtain reflectance and light diffusion spectra. Both are simultaneously fitted by a GPU-accelerated Monte Carlo model to obtain skin optical parameters as a function of depth. The results show a clear correlation between deep skin light diffusion at wavelengths above 590 nm and the subject age, which indicates a progressive degradation of skin homogeneity with age. The effect of this orange–red light diffusion background is to alter the colour tone of the skin. A skincare product is used to show that the warmer skin colour tone is clearly perceivable to consumers when evaluating facial images with and without the product. The product effect also correlates well with hyperspectral measurements. Lastly, this innovative approach demonstrates a first step in real-time skin characterization for consumers and opens the door to customized cosmetic solutions for individual needs. Note de contenu : - METHODOLOGY : Volunteers - Instrumental - Monte Carlo modelling - Light dispersion analysis - RESULTS : Light diffusion versus age - Product application DOI : https://doi.org/10.1111/ics.12936 En ligne : https://drive.google.com/file/d/1Zdhv83PIbxRoh_kG49HN0shEqOIoIZtR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41339 [article]

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Dependent light scattering in white paint films : clarification and application of the theoretical concepts / J.-C. Auger in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 3 (05/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 3 (05/2012) . - p. 287-295 Titre : Dependent light scattering in white paint films : clarification and application of the theoretical concepts Type de document : texte imprimé Auteurs : J.-C. Auger, Auteur ; Brian Stout, Auteur Année de publication : 2012 Article en page(s) : p. 287-295 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dioxyde de titane Lumière -- Diffusion Pigments inorganiques Revêtements Index. décimale : 667.9 Revêtements et enduits Résumé : Among the numerous publications analyzing the causes and consequences of titanium dioxide crowding on the optical properties of white paint films, one notes some inconsistencies. First, a significant number of studies are inclined to describe “dependent” and “multiple” scattering of light as distinct phenomena. Second, the transition from independent to dependent light-scattering is often associated with an ill-defined “threshold” concentration. The aim of this study is to clarify the intricate connections between these two scattering regimes and in particular to show that for white paint films loaded with rutile titanium dioxide pigments, “dependent” light scattering is merely a particular manifestation of multiple scattering processes. We also clarify that the transition from independent to dependent scattering is a continuous process that cannot be formally related to a specific threshold in the pigment volume concentration. Finally, we propose a simple method based on the dependent scattering amplitude to assist paint formulators facing the task of improving the hiding power of a white paint either by increasing the quantity of pigments or by improving their spatial state of dispersion. Note de contenu : - STUDY OF ELECTROMAGNETIC COUPLINGS INVOLVED IN LIGHT-SCATTERING PROCESSES BETWEEN TIO2 PIGMENTS : Previous clafirication - Review of the light propagation models in heterogeneous media - Charaterization of the single-to-multiple scattering transitions - Characterization of the independent-to-dependent scattering transition - Far-field coherent scattering - Evidence of far-field coherent scattering vs near-field interaction via numerical simulations - Partial conclusions - STUDY OF THE DEPENDENT LIGHT-SCATTERING TRANSITION : Description and characterization of dependent scattering transition - Characterization of dependent light-scattering amplitude - PRACTICAL APPLICATION DOI : 10.1007/s11998-011-9371-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9371-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15953 [article]

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Discussion on dependent light scattering phenomenon in white paint films / Jean-Claude Auger in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 6 (11/2013)  

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Effect of nano polytetrafluoroethylene on epoxy melamine coating / S. S. Ramteke in SURFACE COATINGS INTERNATIONAL, Vol. 95, 3 (05/2012)  

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Facile fabrication of superhydrophobic nanocomposites coating materials using nanoemulsion polymerization technique and its application for protecting the petroleum carbon steel pipelines / M. R. Noor El-Din in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 1 (01/2023)  

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Finding the white balance / Thomas R. Hanna in EUROPEAN COATINGS JOURNAL (ECJ), N° 10 (10/2014)  

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Getting the most out of dynamic light scattering / Stephen Ball in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 204, N° 4598 (07/2014)  

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How paint quality impacts carbon footprint / Steven de Backer in EUROPEAN COATINGS JOURNAL (ECJ), N° 1 (01/2022)  

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A hybrid ray-wave optics model to study the scattering behavior of silver metallic paint systems / Christopher M. Seubert in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 3 (05/2018)  

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Industrial color testing / Hans G. Volz / Weinheim [Allemagne] : VCH (1995)

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Influence of particle size distribution of calcium carbonate pigments on coated paper whiteness / Nitin Kumar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 5 (10/2011)  

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Influence of pigment blends of different shapes and size distributions on coated paper properties / Nitin Kumar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 5 (10/2011)  

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Keeping on the white track / Johan J. Rommens in EUROPEAN COATINGS JOURNAL (ECJ), N° 3 (03/2015)  

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Lignin based colorant : modified black liquor for leather surface coating application / P. Balasubramanian in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 10 (10/2018)  

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Micellar water characterisation via laser light scattering / Dana Castro in PERSONAL CARE EUROPE, Vol. 12, N° 3 (06/2018)  

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A new generation of light scattering device with real time data analysis for rheo-optical measurements / Deepak Arora in APPLIED RHEOLOGY, Vol. 21, N° 4 (2011)

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New shades grown from silver / Jonathan D. Doll in EUROPEAN COATINGS JOURNAL (ECJ), N° 9 (09/2013)  

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