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Facile synthesis of atomic oxygen-resistant methyl silicone rubber-coated Kapton film for photovoltaic solar array blanket in low Earth orbit / Yi Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)
[article]
Titre : Facile synthesis of atomic oxygen-resistant methyl silicone rubber-coated Kapton film for photovoltaic solar array blanket in low Earth orbit Type de document : texte imprimé Auteurs : Yi Li, Auteur ; Zhonghua Li, Auteur ; Yanchun He, Auteur ; Kai Wang, Auteur ; Detian Li, Auteur Année de publication : 2023 Article en page(s) : p. 623-633 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Corrosion par érosion
Elastomères silicones vulcanisables à chaud
KaptonLe Kapton est un film de polyimide (polymère à base d'imide) développé à la fin des années 1960 par DuPont, qui peut rester stable dans une plage étendue de température, de −269 à 400 °C.
Utilisation :
La conductivité thermique du Kapton à des températures de 0,5 à 5 kelvins est plutôt élevée pour de telles températures basses. Ceci, combiné à ses bonnes qualités diélectriques et à sa disponibilité en tant que feuilles minces, en fait un matériau de prédilection pour la cryogénie, car il fournit une isolation électrique à faibles gradients thermiques. Le Kapton est régulièrement utilisé comme isolant dans des environnements à très haut vide en raison de son faible taux de dégazage.
Il est utilisé, entre autres, dans le processus de fabrication des circuits imprimés souples, les supports de bobines mobiles de haut-parleurs haute puissance et pour l'isolation de certains fils électriques de « haute fiabilité » pour les domaines aéronautiques et spatiaux (lanceurs et satellites). Il est aussi utilisé dans le domaine de l'impression 3D grâce à son adhérence avec le plastique à des températures dépassant 40 °C et grâce à sa résistance à la chaleur.
De plus, il peut être utilisé pour l'isolation des méplats cuivre ou aluminium. Cette isolation est utilisée pour la construction des moteurs de traction (de train) soumis à des températures élevées.
Ce nom de marque est passé dans le langage courant, comme le kevlar[réf. souhaitée].
Un rouleau de Kapton adhésivé
Un rouleau de Kapton adhésivé.
Le Kapton est également utilisé dans la fabrication des circuits imprimés souples (dits « flex »), ainsi qu'en réparation électronique en tant qu'isolant. Il est disponible en ruban.
Le Kapton peut aussi servir en impression 3D pour renforcer le pouvoir adhésif des plateaux chauffants souvent peu adhérents lors de l'impression des pièces plastiques.
Bouclier thermique du télescope James-Webb, fait à partir de Kapton.
Le bouclier thermique du télescope James-Webb est composé de cinq feuilles de Kapton (couvertes d'aluminium).
(Wikipedia)
Mesure
Oxygène atomique
Polyimides
Revêtements organiques
Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : A highly flexible coating deposited on organic substrates is one of the most suitable techniques for efficient atomic oxygen (AO) resistance in low Earth orbit (LEO). In this study, a highly homogeneous methyl silicone rubber coating as an AO-tolerant material was fabricated on a flexible Kapton film by a spraying process used in a photovoltaic solar array blanket. The produced silicone rubber coating has excellent AO resistance and exhibits a low shrinkage tendency after evaluating the effect of atomic oxygen on the erosion kinetics, surface morphology, and surface composition of this coating. The erosion yield of the silicone rubber-coated Kapton, which was less than 3.1% of that of the Kapton, was less than 0.92 × 10−25 cm3 atom−1 under an AO fluence of 4.04 × 1021 atoms cm−2 (equiv 10 years of AO exposure in the LEO with an altitude of 500 km). It suggests that the silicone rubber layer can effectively prevent AO from eroding Kapton. In addition, a SiO2 passivation layer was formed on the surface of the silicone rubber coating during AO irradiation, which demonstrated a “self-reinforcing” protection mechanism. This work also provides a facile method for designing and preparing large-scale flexible protective coatings with excellent AO resistance. Note de contenu : - EXPERIMENTAL : Materials - Fabrication of silicone rubber protective coating - Atomic oxygen exposure experiments - Thermal cycling test
Measurements and characterization
- RESULTS AND DISCUSSION : Characterization of methyl silicone rubber coating - Evaluation of AO resistance of silicone rubber protective coatings - The effect of AO on the surface morphology and optical properties of Kapton and silicone rubber-coated Kapton films - Influence of AO on the chemical structure of the silicone rubber coating - Influence of AO on the surface chemical compositions of the silicone rubber coatings
- Table 1 : AO erosion data, optical transparency, and root mean square roughness (RMS) values for pristine Kapton and silicone rubber-coated Kapton before and after exposure to a variety of AO fluences
- Table 2 Surface compositions of the silicone rubber coating before and after AO exposure obtained from XPS data, and corresponding to the central peak position and FWHMDOI : https://doi.org/10.1007/s11998-022-00694-y En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00694-y.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39307
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 623-633[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24056 - Périodique Bibliothèque principale Documentaires Disponible Factors affecting SPF in vitro measurement and correlation with in vivo results / A. Dimitrovska Cvetkovska in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 39, N° 3 (06/2017)
[article]
Titre : Factors affecting SPF in vitro measurement and correlation with in vivo results Type de document : texte imprimé Auteurs : A. Dimitrovska Cvetkovska, Auteur ; Stefano Manfredini, Auteur ; P. Ziosi, Auteur ; S. Molesini, Auteur ; V. Dissette, Auteur ; I. Magri, Auteur ; C. Scapoli, Auteur ; A. Carrieri, Auteur ; E. Durini, Auteur ; S. Vertuani, Auteur Année de publication : 2017 Article en page(s) : p. 310-319 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Etude in vitro
Facteur de protection solaire
Formulation (Génie chimique)
Mesure
Produits antisolairesIndex. décimale : 668.5 Parfums et cosmétiques Résumé : OBJECTIF : The in vitro evaluation of SPF is still a problem due to the lack of repeatability and correlation between the in vitro and in vivo data, and many authors are currently working to develop an internationally harmonized method. Very recently, the use of several “adjuvant” ingredients such as boosters, antioxidants, immunomodulators, solvents and film-forming ingredients have further complicated the pattern for product developers that should frequently run in vivo test. The aim of this study was to understand whether a simple and cheap in vitro method could be optimized in order to provide both statistically repeatable and predictive SPF measurement.
METHODS : In vitro SPF assessments were carried out on 75 commercial products. The SPF was measured according to two laboratory methods (A and B), using different substrates (PMMA and surgical tape Transpore™), quantity of product and spectrophotometers. In order to evaluate whether a standard technique of spreading could lead to a statistically reliable result, we applied different spreading pressure (100 g and 200 g). Furthermore, we investigate whether other parameters characterizing the product (SPF category, filter and texture) might represent statically significant variables affecting the measures. We then compared the results obtained from in vitro SPF measure of 11 products to in vivo SPF, in order to assess the predictability of in vitro methods.
RESULTS : Several problems were encountered in confirming the weakness of the in vitro procedures. Pressure, SPF category, filter and texture did not affect significantly the results. Overall best results were obtained with the B2 method that in terms of repeatability and predictivity provided statistically better results. Method A with Transpore™ tape showed better in vitro–in vivo correlation than Method B with PMMA plates.
CONCLUSION : In our investigation, we demonstrated that it is possible for a single laboratory to optimize internal methods and protocols to achieve repeatable and predictive in vitro results, but it is extremely difficult to develop methods reproducible and equally reliable in different laboratories, probably due to "external variables" (e.g. environmental, operator), which are difficult to control.Note de contenu : - MATERIALS AND METHODS : Substrates - Sunscreens - Spectrophotometric measurements - In vitro method based on spectral measurements - Method A - based on Diffey-Robson's method - Method B - based on ISO 24443 - Calibrationof the in vitro SPF - In vitro SPF calculation - In vivo evaluation of products - Criteria of interpretation
- RESULTS AND DISCUSSION : Correlation between in vitro and in vivo dataDOI : 10.1111/ics.12377 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28629
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 39, N° 3 (06/2017) . - p. 310-319[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18959 - Périodique Bibliothèque principale Documentaires Disponible Factors affecting the measurement of photochromic lens performance / Liu Ouyang in COLORATION TECHNOLOGY, Vol. 132, N° 3 (06/2016)
[article]
Titre : Factors affecting the measurement of photochromic lens performance Type de document : texte imprimé Auteurs : Liu Ouyang, Auteur ; Hongliang Huang, Auteur ; Yong Tian, Auteur ; Wei Peng, Auteur ; Huanbao Sun, Auteur ; Weizhong Jiang, Auteur Année de publication : 2016 Article en page(s) : p. 238-248 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Lentilles (optique)
Mesure
PhotochromismeIndex. décimale : 535.33 Instruments d'optique : classer à 681.4 Résumé : The principles, characteristics, and measurement methodology of photochromism of plastic ophthalmic lenses are briefly introduced and discussed. The factors influencing measurement variation and accuracy, including the preconditioning process, measurement device, and procedure, were investigated on ophthalmic photochromic lenses covering both photocasting and photocoating lens technologies. By design of experiment, factors affecting the measurements were studied using a photochromic measurement rig with reference to ISO 8980-3 requirements. Experimental results prove the necessity for a lens preconditioning process prior to measurement. The excitation light source in the photochromic measurement rig has the greatest impact on measurement variation from the device perspective, while lens temperature is the key environmental factor. On the basis of the investigation, recommendations are made for reducing measurement variations and improving result accuracy. Note de contenu : - EXPERIMENTAL : Materials - Measurements - Experiments
- RESULTS AND DISCUSSION : PMR stability and lens performance uniformity - Lens geometry - Lens preconditioning - Measurements conditions - Other factorsDOI : 10.1111/cote.12214 En ligne : https://drive.google.com/file/d/1CA-86eJTWzKcH4C8Yuj1a8eTPmU1VxXU/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26356
in COLORATION TECHNOLOGY > Vol. 132, N° 3 (06/2016) . - p. 238-248[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18101 - Périodique Bibliothèque principale Documentaires Disponible Fast-drying paints for the mechanical engineering industry / Andreas Morlock in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 10, N° 2 (2017)
[article]
Titre : Fast-drying paints for the mechanical engineering industry Type de document : texte imprimé Auteurs : Andreas Morlock, Auteur ; Harald Kämpf, Auteur Année de publication : 2017 Article en page(s) : p. 14-15 Langues : Anglais (eng) Catégories : Anticorrosifs
Anticorrosion
Economies d'énergie
Epoxydes
Essais d'adhésion
Haut extrait sec
Industries mécaniques
Mesure
Métaux -- Revêtements:Métaux -- Peinture
Revêtements bi-composant:Peinture bi-composantIndex. décimale : 667.9 Revêtements et enduits Résumé : A new paint system has been developed for machinery components, such as electric motors, gearboxes and pumps. It has a shorter drying time and uses less energy during the drying process than comparable coatings. Note de contenu : - Fast drying at room temperature
- Good corrosion protection
- Epoxy systems as an alternative
- Ideal for drive system components
- TABLES : 1. Overview of the properties of the new high-solid paints - 2. Adhesion of the coating on different metal substrates. The measurements were made using the cross-hatch test and the adhesive tape test in accordance with DIN EN ISO 2409 - 3. Energy calculation for the UR1984 high-solid system. The sample calculations from the drive system manufacturing industry of the energy required demonstrated that significant annual energy savings are possible where there is a high substrate throughput and a paint drying oven is not usedPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29102
in INTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 10, N° 2 (2017) . - p. 14-15[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19205 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : A fertile area : Pure gearbox technology for extrusion Type de document : texte imprimé Année de publication : 2018 Article en page(s) : p. 35-38 Langues : Anglais (eng) Catégories : Automatisation
Boites à vitesse
Lasers -- Applications industrielles
Logiciels
Logistique (organisation)
Matières plastiques -- Extrusion
Mesure
Production
Production en série
Qualité -- Contrôle
Robots industrielsIndex. décimale : 668.4 Plastiques, vinyles Résumé : In a region of Italy known better for fruit and vegetable cultivation, a machine manufacturer is currently expanding vigorously. To learn about its recipe for success, we made an appointment to visit it. Note de contenu : - Two production sites
- More automation, more technical staff
- Growing technical requirements
- Extrusion technology - Nothing else
- Fig. 1 : High production depth : to ensure high quality gearboxes, the gearbox manufacturer produces virtually all the components in-house starting from steel (in the background)
- Fig. 2 : Use of robots : Zambello is continually looking for ways to automate individual steps, despite the wide range of products
- Fig. 3 : Quality control : after the gearbox blocks have had 24 hour's time in the measurement room to reach thermal equilibrium, they are measured three-dimensionally
- Fig. 4 : 66 at one go : This recently installed system processes gearbox housings fed on pallets with a selection of up to 1000 tools and subsequently cleans them fully automatically to remove processing residues
- Fig. 5 : The heard of series production : In factory 2 in Lendinara, production is oriented to filling the fully automated high-bay warehouse with up to 15000 different parts, so that production can start immediatly when orders are received. For this, the components are managed by the software with the aid of a self-learning positioning logic, which places frequently used components closer to the exit
- Fig. 6. Laser measurement : Deviations during manufacturing can be measured with the aid of specially developed 3D laser measurement with micrometer accuracy
- Fig. 7 : Gearbox variety : Different applications such as electricity cable insulation, blown film production and pipe extrusion require different designs of gearbox because of construction differences in the extruderEn ligne : https://drive.google.com/file/d/1MAq2l8HHxxgB3_Xxa10-DzCV2V_EzXfh/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30601
in KUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 5 (05/2018) . - p. 35-38[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19890 - Périodique Bibliothèque principale Documentaires Disponible Fibers skillfully concealed / Andreas Schobel in KUNSTSTOFFE INTERNATIONAL, Vol. 105, N° 1-2 (01-02/2015)
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PermalinkFluorescence polarization of dye-labeled collagen : local flexibility in the nonhelical region / D. Quimby in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXX (Année 1975)
PermalinkForearm skin aging : characterization by instrumental measurements / Paula Roberta Silva de Carvlho in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 39, N° 5 (10/2017)
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PermalinkHelping coatings perform / Mary E. Koban in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 194, N° 4478 (07/2004)
PermalinkHow to prove pro-ageing claims in vivo / Anne Charpentier in GLOBAL PERSONAL CARE, Vol. 23, N° 4 (04/2022)
PermalinkHyperbranched polyurethanes with flammability resistance for leather retanning / Sheng Ding in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 10 (10/2022)
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PermalinkImproved chrome utilisation in chrome tanning / William C. Prentiss in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 66 (Année 1982)
PermalinkImproving adhesion / Rory A. Wolf in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 196, N° 4498 (03/2006)
PermalinkIn-process fiber orientation measurement and foreign object damage (FOD) prevention for complex preform or prepreg lay-ups / K. Hazra in SAMPE JOURNAL, Vol. 48, N° 1 (01-02/2012)
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PermalinkIndustrie des rubans adhésifs. Mesure de l'allongement sous charge statique - Norme NF EN 12028 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (1996)
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