Detection of different chemical binders in coatings using hyperspectral imaging / Bahman Raeissi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 2 (03/2022) Titre : Detection of different chemical binders in coatings using hyperspectral imaging Type de document : texte imprimé Auteurs : Bahman Raeissi, Auteur ; Muhammad Ahsan Bashir, Auteur ; Joseph L. Garrett, Auteur ; Milica Orlandic, Auteur ; Tor Arne Johansen, Auteur ; Torbjorn Skramstad, Auteur Année de publication : 2022 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse spectrale Diluants Données massives Epoxy amine Epoxy novolac Imagerie (technique) Liants Métaux -- Revêtements protecteurs Ondes décamétriques Organosilanes Polyuréthanes Produits chimiques -- Détection Rayonnement infrarouge Index. décimale : 667.9 Revêtements et enduits Résumé : Organic coatings protect metallic structures of significant commercial value. Regular inspections of coatings are required to ensure their integrity and, therefore, to verify their stated performance. However, for metallic structures located in harsh places, coating inspection can pose significant safety and logistical challenges. Near-infrared (NIR) spectroscopy is a rapid, nondestructive and relatively inexpensive analytical technique. It is currently employed to analyze different chemicals in fields like agriculture, food, and pharmaceuticals. Similarly, hyperspectral imaging (HSI) creates a spatial map of spectral information by measuring light reflected from a material. In this work, hyperspectral imaging in the NIR portion of the electromagnetic spectrum (NIR-HSI) is used to accurately distinguish between the chemically different binders employed in commercial organic coatings. In addition, k-means clustering is explored as a tool to provide diagnostic information about the spatial inhomogeneities in the chemical structure of an applied coating, which, if undetected, can lead to coating defects during service life. The results of this work suggest that the NIR-HSI could be used for remote inspections of organic coatings. Note de contenu : - EXPERIMENTAL WORK : Chemicals and panels preparation - Hyperspectral imaging system and data acquisition - Methods - RESULTS AND DISCUSSIONS : Epoxy-amine systems - Epoxy novolac cured with amine curing agent - Silicone resin with organosilane - Polyurethane - Different extenders used in model epoxy-amine systems - Distinguishing between binders DOI : https://doi.org/10.1007/s11998-021-00544-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00544-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37287 [article]

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L'envol de la technique haute fréquence / J.-P. Bernard in CAOUTCHOUCS & PLASTIQUES, N° 740 (04/1995)

[article]  inCAOUTCHOUCS & PLASTIQUES > N° 740 (04/1995) . - p. 64-66 Titre : L'envol de la technique haute fréquence Type de document : texte imprimé Auteurs : J.-P. Bernard, Auteur ; B. Charon, Auteur Année de publication : 1995 Article en page(s) : p. 64-66 Note générale : Bibliogr. Langues : Français (fre) Catégories : Composites -- Collage Ondes décamétriques Index. décimale : 668.4 Plastiques, vinyles Résumé : Développé sur la base d'un partenariat mené avec Peugeot, le collage à haute fréquence appliqué aux pièces composites permet d'accroître la productivité tout en réduisant le coût d'exploitation. Note de contenu : - Une alternative aux techniques traditionnelles - De la recherche à l'industrialisation Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25398 [article]

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High frequency fatigue / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 3 (2022)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 112, N° 3 (2022) . - p. 38-40 Titre : High frequency fatigue : Fatigue of short glas fiber-reinforced technical thermoplastics Type de document : texte imprimé Auteurs : Christian Hopmann, Auteur ; Hakan Celik, Auteur Année de publication : 2022 Article en page(s) : p. 38-40 Langues : Anglais (eng) Catégories : Composites à fibres courtes Composites à fibres de verre Matériaux -- Fatigue Ondes décamétriques Vibrations (mécanique) Index. décimale : 668.4 Plastiques, vinyles Résumé : Short glass fiber-reinforced plastics are widely used in structural and housing components that are permanently exposed to vibrations with frequencies up to around 103 Hz. In order to enable appropriate dimensioning against high-frequency vibration loads, the influence of frequency on material fatigue is investigated in this work. Note de contenu : - The interaction of load duration and frequency - Frequency dependent fatigue - Fig. 1 : Factors influencing the fatigue of short glass fiber-reinforced thermoplastics - Fig. 2 : Frequency-dependent fatigue data obtained from Woehler experiments - Fig. 3 : Influence of the frequency on the evolution of the material temperature during the fatigue experiments En ligne : https://drive.google.com/file/d/1LqCd9Si0pP6DBcUXWmc2dwpzhGTmuegm/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37710 [article]

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Quality welding / Martin Facklam in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 12 (12/2016)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 106, N° 12 (12/2016) . - p. 30-33 Titre : Quality welding : Trends in ultrasonic, laser, infrared, high frequency welding and in lightweight design Type de document : texte imprimé Auteurs : Martin Facklam, Auteur Année de publication : 2016 Article en page(s) : p. 30-33 Langues : Anglais (eng) Catégories : Automatisation Chaleur -- Récupération Logiciels Matériaux -- Allègement Matières plastiques -- Soudage Ondes décamétriques Salons professionnels Soudage laser Soudage par rayonnement infrarouge Soudage par ultrasons Index. décimale : 668.4 Plastiques, vinyles Résumé : This year again, visitors to the K 2016 trade show were presented with a wide range of solutions from joining technologies. Irrespective of the process, the trend is towards flexibility. Once again, the focus was on digitization and automation of the joining processes. Note de contenu : - More than just a generator - DataRecorder software - Practical weld test specimens - Virtual welding process - Laser-based infrared welding - HF welding unit for blood bags - Automated pipe processing - Hot-air recycling - Secure screw connections for lightweight design En ligne : https://drive.google.com/file/d/15mQXa5_upaylzs_w-zxwbCtSQfb3w17D/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27412 [article]

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Study and optimization of oil-in-water emulsions formulated by low- and high-frequency ultrasounds / Louise Perrin in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° 2 (03-04/2023)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 45, N° 2 (03-04/2023) . - p. 198-213 Titre : Study and optimization of oil-in-water emulsions formulated by low- and high-frequency ultrasounds Type de document : document électronique Auteurs : Louise Perrin, Auteur ; Sylvie Desobry-Banon, Auteur ; Guillaume Gillet, Auteur ; Stephane Desobry, Auteur Année de publication : 2023 Article en page(s) : p. 198-213 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cosmétiques Emulsions -- Emploi en cosmétologie Emulsions -- Stabilité Formulation (Génie chimique) Ondes décamétriques Plan d'expérience Ultrasons Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : A combined treatment using both low-frequency (20 kHz) and high-frequency ultrasounds (1.63 MHz) is a promising new process to stabilize emulsions with minimalist formulation. In order to optimize process parameters, a Doehlert experimental design was performed with oil-in-water emulsions, presently used for cosmetic products, composed of water, caprylic/capric triglycerides and oleic acid. - Methods : Effects of treatment time, oil content and oleic acid content were studied on emulsion properties (droplet size, polydispersity index, ζ-potential and yield of oil incorporation) and on emulsion stability after a 28-day storage (creaming index, Turbiscan stability index (TSI) and oil release). - Results : From experimental data, a model was established that allowed to study effects of each parameter and their interactions on emulsion formation and stability. Oleic acid content had a great impact on emulsion formation: It reduced droplet size, PDI and ζ-potential and increased yield of oil incorporation. However, a critical value could be highlighted, beyond which oleic acid effects reversed. Treatment time had an important beneficial effect on emulsion stability as it decreased creaming index, TSI and oil release after 28 days of storage. Oil content had a negative effect on emulsion formation and on emulsion stability. However, treatment time and oil content often had a beneficial synergistic effect. - Conclusion : The optimized conditions for emulsion processing were obtained through a desirability approach. They were experimentally validated. Note de contenu : - MATERIALS AND METHODS : Materials - Emulsification process - Size and ζ-potential measurements - Multiple light scattering for stability determination - Yield of oil incorporation and oil release after 28 days of storage determination - Experimental design - Model validation - Data and statistical analyses - Effect of experimental parameters on emulsion properties - RESULTS AND DISCUSSION : Effect of experimental parameters on emulsion properties - Effect of experimental parameters on emulsion stability - Optimization of emulsion properties and stability - Model validation - Table 1 : Experimental domain and levels of studied parameters in emulsification process - Table 2 : Doehlert experimental design to study emulsification process - Table 3 : Experimental data obtained for each experiment in Doehlert experimental design - Table 4 : Predictive model regression coefficients for responses defining emulsion properties - Table 5 : Prediction model regression coefficients for responses defining emulsion stability - Table 6 : Comparison between predicted and experimental data obtained for model validation DOI : https://doi.org/10.1111/ics.12831 En ligne : https://drive.google.com/file/d/1TKyB0gTa88FJ000S2FbmQdRAy_0_fxU-/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39170 [article]

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Le surmoulage de vitrage par haute fréquence / Jean-Paul Bernard in CAOUTCHOUCS & PLASTIQUES, N° 770 (09/1998)  

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Valorizing apple byproducts for cosmetics / Diana Campos Gomez in GLOBAL PERSONAL CARE, Vol. 24, N° 8 (09/2023)  

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