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Digital image capture - Filmless camera technology and techniques / Algy Kazlauciunas in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B3 (09/2006)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B3 (09/2006) . - p. 193-199 Titre : Digital image capture - Filmless camera technology and techniques Type de document : texte imprimé Auteurs : Algy Kazlauciunas, Auteur Année de publication : 2006 Article en page(s) : p. 193-199 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Imagerie numérique Photographie numérique Tags : 'Dispositif  semi-conducteur  à  couplage  de  charge'  'Oxyde  métal  complémentaire'  'Capteur  photo'  'Convertisseur  analogique-numérique'  'Frange  moirée'  Photodiode Index. décimale : 667.9 Revêtements et enduits Résumé : The digital imaging revolution continues apace, affecting the whole spectrum of the photographic industry. In many part of the world digital cameras now outsell conventional film cameras, and many of the disadvantages associated with digital image capture in the very recent past1.2 have been nulified. As the digital industry grows, the various technologies involved continue to be ever innovative. With respect to digital cameras, the image sensor performance criteria have improved immeasurably since the launch of the first solid-state camera in the early 1980s. The charge-coupled semiconductor device (CCD), for so long the unrivalled image-capture component in digital cameras, is now being challenged by complementary metal oxide semiconductor (CMOS) technology and the innovatively re-designed Fujifilm Super CCD. In addition, the recent introduction of the Foveon full-colour imaging sensor has added a new dimension to digital image capture. This paper reviews current image-capture sensors and the way that the various digital imaging camera designs are able to record and reproduce colour images. Note de contenu : - Sensor technology : Charge-coupled semiconductor (CCE) - Complementary metal oxide semiconductor (CMOS) - Fujifilm super CCD - Foevon X3 CMOS full-colour imaging sensor - Digital camera classification/colour capture and reproduction methodology - One-shot single matrix - Three-shot single matrix - One-shot triple matrix - Scanning trilinear array - Multi-shot single matrix (with whole-element shift) - Multi-shot single matrix (with sub-element shift) DOI : 10.1007/BF02699660 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699660.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5277 [article]

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Nanostructured and hollow polyurethane dispersions / A. Lubnin in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B3 (09/2006)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B3 (09/2006) . - p. 201-208 Titre : Nanostructured and hollow polyurethane dispersions Type de document : texte imprimé Auteurs : A. Lubnin, Auteur ; P. L. Izquierdo, Auteur ; V. Woodward, Auteur Année de publication : 2006 Article en page(s) : p. 201-208 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dispersions et suspensions Nanostructures Polyuréthanes Index. décimale : 667.9 Revêtements et enduits Résumé : Due to their superior properties, ease of use and ‘green’ nature, water-borne polyurethane dispersions (PUDs) are often materials of choice for a wide spectrum of applications. Common processes for making these dispersions do not offer easy ways of controlling particle morphology/architecture. This puts PUDs in a position inferior to structured acrylic emulsions. The latter are most readily produced by the sequential or staged addition of monomers with is widely used in the engineering of structured acrytic and vinyl emulsion polymers. Because PU oligomers do not diffuse through the aqueous phase, this route is closed for PUDs. How car this fundamental obstacle be overcome? In this paper, a new method is described that enables the preparation of nanostructured PU particles with a wide variety of morphologies. The method is comprised of the preparation of two prepolymers with different hydrophilicities, which are mixed together before the dispersion step Surprisingly, the mixture ‘remembers’ that it is made of two different prepolymers, and as soon as the prepolymer is dispersed in water, diffusion within the particles sets in. The origin of this unexpected memory is examined in detail. The interplay of diffusion, phase separation and chain extension determines the morphological outcome. Various previously inaccessible PU particle morphologies, including core-shell, ‘ice-cream cone’, lobed and hellow particles, have been prepared. This novel patent-pending technology opens up new horizons for PUD chemistry. Note de contenu : - Prior art - Prepolymer process for making PUDs - Process for making nanostructured PUDs - First successful core-shel PUD - Transmission electron microscopy (TEM) - Bromine staining - Analysis of oligomers formed at the prepolymer stage - Theoretical considerations : Diffusion versus phase separation - Diffusion - Phase separation - Surface tension as a driving force - Guidelines for preparation of nanostructured PUDs - Cryogenic scanning electron microscopy (CryoSEM) - Rubbery core - gassy shel ('modulus staining') - The impact of particle size on morphology - Hollow particles - Table 1 : Composition of oligomers in one-pot versus two-pot syntheses DOI : 10.1007/BF02699661 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699661.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5278 [article]

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Study on novel heat-resistant aqueous dispersion based on modified poly(phthalazinone ether nitrile ketone)s / Z. Y. Liu in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B3 (09/2006)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B3 (09/2006) . - p. 209-214 Titre : Study on novel heat-resistant aqueous dispersion based on modified poly(phthalazinone ether nitrile ketone)s Type de document : texte imprimé Auteurs : Z. Y. Liu, Auteur ; J. Y. Wang, Auteur ; Q. L. Yan, Auteur ; Y. Kou, Auteur ; X. G. Jian, Auteur Année de publication : 2006 Article en page(s) : p. 209-214 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dispersions et suspensions Hydrophilie Polyphthalazinone éther nitrile cétones Résistance thermique Revêtements -- Propriétés thermiques Revêtements en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Poly(phthalazione ether nitrile ketone)s (PPENK), modified with NaOH, were studied in order to find a hydrophilic resin with could be used in heat-resistant water-borne coatings. The properties of hydrolysates — HPPENKa (0.5 hours), HPPENKb (1.5 hours) and HPPENKc (3.5 hours) — were measured by differential scanning calorimetry (DSC), thermo-gravimetric analysis (TGA), contract angle (water) and solubility. The structures of the hydrolysates were confirmed by FIIR (Fourier transform infrared spectroscopy) and1H-NMR. The results indicated that the conversion ration of the nitrile groups and the glass transition temperature (79) of the hydrolysates increased, whereas the weight loss ratio of HPPENK decreased as the hydrolysis time was prolonged As expected, the hydrophificity of HPPENK improved greatly (eg when the CN conversion ratio was 93.82%, and the water contact angles decreased from 75.3° for PPENK to 54.4° for HPPENK). By studying the effects of the different reactions of the co-solvents, the reaction temperature and the NaOH concentration on the hydrolysis, it could be concluded that the optimal synthetic technology was of a 6M NaOH solution with DMAc (N,N-dimethylacetamide) as co-solvent at 120°C. Aqueous dispersions based on three modified resins were prepared and their storage stability was as follows: HPPENKc >HPPENKb>HPPENKa. In particular, the HPPENKc dispersion had no settling for more than 30 days and provided good film-forming. The cured film properties of HPPENKc were as follows: pencil rigidity (six hours), thermal impact resistance (300°C, 24 hours), and adhesion (grade 1). Curing agents were applied to the dispersion, such as hexamethoxymethyl melamine (HMMM), epichlorohydrin (ECH), triethanolamine, and glycerol, etc. HMMM and ECH provided excellent curing properties. The co-operating emulsification of (Span) sorbate and (Tween) polyoxyethylene sorbate could improve the stability of the HPPENK dispersion. Note de contenu : - EXPERIMENTAL : Materials - Sample preparation - RESULTS AND DISCUSSION : Structural characterisation - The effect of reaction time on the thermal stability of hydrolysates - The effect of different alkali concentration on hydrolysis - Co-solvents in hydrolysis - Hydrolysis reaction temperature - The effect of different reaction times on hydrophilicity and solubility of hydrolysates - Shelf-life - Curing agents - Emulsifier - Heat-resistant properties of cured film of HPPENK - Table 1 : FT IR assignments of chemical groups of the hydrolysates - Table 2 : The thermal stability of PPENK and HPPENK - Table 3 : Solubility of PPENK and HPPENK (at room temperature) - Table 4 : Effect of curing agents on HPPENKc film property - Table 5 : Heat-resistant properties of cured film of HPPENK DOI : 10.1007/BF02699662 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699662.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5279 [article]

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Production of alkyd resins and their paints : Effect of catalyst on their properties / D. Doulia in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B3 (09/2006)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B3 (09/2006) . - p. 215-219 Titre : Production of alkyd resins and their paints : Effect of catalyst on their properties Type de document : texte imprimé Auteurs : D. Doulia, Auteur ; K. Georgopoulou, Auteur ; S. Rokotas, Auteur Année de publication : 2006 Article en page(s) : p. 215-219 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Catalyseurs Formulation (Génie chimique) Polyalkydes Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : Modified alkyd resins were produced by alcoholysis of soya bean oil with pentaerythritol followed by esterification with pentaerythritol and phthalic anhydride. Various catalysts with different contents, including LiOH, butyl tin oxide and dibutyl tin chloride, were used for alcoholysis and/or esterification reactions. The effect of the catalyst on the reduction of the process time of alkyds, and their physicochemical and film properties, were investigated and evaluated. The catalytic system LiOH 0.07% — dibutyl tin chloride 0.2% proved to be the best catalyst system followed by LiOH 0.07%. The coating film characteristics of two paints, formulated with selected alkyds, were measured and compared. Note de contenu : - Materials - Synthesis of alkyd resins by alcoholysis-esterification of oils - Preparation of solvent-based paints - Analytical and test methods - Table 1 : Formulation of alkyd paint - Table 2 : Effect of catalytic system on the process time for the synthesis of modified alkyd resins by the alcoholysis-esterification method - Table 3 : Properties of the alkyd resins produced by alcoholysis (A)-esterification (E) process with various catalytic systems - Table 4 : Coating properties of the paints from selected modified alkyd resins DOI : 10.1007/BF02699663 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699663.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5280 [article]

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Effect of cross-linking density on coating properties of a polyurea coating system / M. A. Shenoy in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B3 (09/2006)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B3 (09/2006) . - p. 221-230 Titre : Effect of cross-linking density on coating properties of a polyurea coating system Type de document : texte imprimé Auteurs : M. A. Shenoy, Auteur ; D. J. D'Melo, Auteur Année de publication : 2006 Article en page(s) : p. 221-230 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Formulation (Génie chimique) Polyamides Un polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine. Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères. Polymères -- Synthèse Polyurée Réticulation (polymérisation) Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Index. décimale : 667.9 Revêtements et enduits Résumé : Polyamides were prepared from a dimer fatty acid, triethylene tetramine and diethylene triamine, and cross-linked using ε-caprolactam-blocked isophorone diisocyanate. These thermoset coatings were then evaluated for various mechanical, chemical and electrical properties. The effect of the cross-linking density on the coating properties was studied. It was observed that with the increase of the cross-linking density, the general toughness of the coatings increased along with chemical resistances, except for acid resistance and the breakdown voltage. However, it was observed that the flexibility and resistance to rapid deformation of the coatings (ie the rigidity of the coatings) decreased with an increase in the cross-linking density of the coating. Note de contenu : - MATERIALS - EXPERIMENTAL : Synthesis of polyamide resins - Synthesis of e-caprolactam-block diisocyanates - Preparation and testing of surface coatings - Spectroscopy - SPECTROSCOPIC ANALYSIS - RESULTS AND DISCUSSION : Mechanical properties - Chemical properties - Electrical properties - Table 1 : Synthesis and characterisation of polyamides - Table 2 : Coating properties of PAT1 cured with e-caprolactum blocked isophorone diisocyanate - Table 3 : Coating properties of PAT2 cured with e-caprolactum blocked isophorone diisocyanate DOI : 10.1007/BF02699664 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699664.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5281 [article]

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Service life prediction of colour retention for PVDF architectural coatings with organic pigments / Kurt A. Wood in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B3 (09/2006)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B3 (09/2006) . - p. 231-235 Titre : Service life prediction of colour retention for PVDF architectural coatings with organic pigments Type de document : texte imprimé Auteurs : Kurt A. Wood, Auteur ; S. R. Gaboury, Auteur Année de publication : 2006 Article en page(s) : p. 231-235 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Décoloration Durée de vie (Ingénierie) Pigments organiques Polyfluorure de vinylidène Prévision, Théorie de la Résistance aux conditions climatiques Revêtements décoratifs:Peinture décorative Revêtements en bâtiment Index. décimale : 667.9 Revêtements et enduits Résumé : The decorative service life of architectural exterior coatings is often determined by the onset of large colour shifts or visible chalking of the coating. Here, the authors report three-year Florida and accelerated weathering results for a series of 70% poly(vinylidene fluoride) (PVDF) coatings made with a palette of relatively weatherable organic pigments. Many of these coatings show minimal visible colour change after three years in Florida, and 6000 hours accelerated weathering. Surprisingly, the more aggressive UV-B bulb exposure, unlike UV-A bulb exposure, shows a high degree of statistical correlation with the three-year colour shift in Florida. For most of these systems, UV absorber/HALS (hindered amine light stabiliser) packages do not improve the performance, but a 70% PVDF clear coat does. Note de contenu : - The service life prediction challenge - Organic pigment series and test conditions - Results for masstone coatings - Spearman rank correlation analysis - Results for tint coating - Table 1 : Pigment grades used in this study - Table 2 : System configurations tested in this study for each pigment DOI : 10.1007/BF02699665 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699665.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5282 [article]

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Water-borne versus solvent-borne paints for protection of steel to atmospheric exposure / F. Fragata in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B3 (09/2006)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B3 (09/2006) . - p. 237-244 Titre : Water-borne versus solvent-borne paints for protection of steel to atmospheric exposure Type de document : texte imprimé Auteurs : F. Fragata, Auteur ; M. Morcillo, Auteur ; D. de La Fuente, Auteur ; D. Santos, Auteur ; E. Almeida, Auteur Année de publication : 2006 Article en page(s) : p. 237-244 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple. Anticorrosifs Anticorrosion Etudes comparatives Métaux -- Revêtements protecteurs Polymères hydrosolubles Revêtement en phase solvant:Peinture en phase solvant Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Water-borne anticorrosive paints are acquiring increasing relevance for the anticorrosive protection of steel surfaces exposed to the atmosphere, mostly due to the restrictions imposed by environmental and health protection agencies. However, some companies continue to be reluctant to use paints of this type to protect steel against atmospheric corrosion. Part of this reluctance may be attributed to low confidence, mainly due to a lack of knowledge of the performance of water-borne paint systems compared with traditional organic solvent-based paint systems. This paper presents results of experimental studies and includes technical considerations on the anticorrosive performance of paint systems using water-borne or solvent-borne paints when exposed to atmospheres with different degrees of corrosivity. On the basis of the practical results and the considerations presented in this paper, it may be stated that water-borne paint systems are currently available which present excellent anticorrosive behaviour, even in highly corrosive atmospheres. Note de contenu : - General analysis of water-borne coating behaviour - Technical considerations on the use of water-borne paint systems for anticorrosive protection of steel surfaces exposed in atmospheres with different corrosivity categories - Table 1 : Solvent-borne paint systems - Table 2 : Water-borne paint systems - Table 3 : Characteristics of atmospheric corrosion test sites - Table 4 : Results of atmospheric corrosion tests at the end exposure - Table 5 : Results of cross-cutting test DOI : 10.1007/BF02699666 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699666.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5283 [article]

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Tripigmented anticorrosive coatings based on lamellar zinc as inhibitor / A. M. Pereyra in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B3 (09/2006)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B3 (09/2006) . - p. 245-249 Titre : Tripigmented anticorrosive coatings based on lamellar zinc as inhibitor Type de document : texte imprimé Auteurs : A. M. Pereyra, Auteur ; Juan G. Castano, Auteur ; Félix Echeverría, Auteur ; L. K. Herrera, Auteur ; Carlos A. Giudice, Auteur Année de publication : 2006 Article en page(s) : p. 245-249 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs Composés lamellaires Concentration pigmentaire volumique Essais de brouillard salin Inhibiteurs (chimie) Pigments Primaire (revêtement) Statistique Zinc Index. décimale : 667.9 Revêtements et enduits Résumé : The objective of this work was to study the behaviour of zinc primers, containing either lamellar zinc alone or lamellar zinc mixed with an extender or with an extender/inhibitor mixture. Several formulations of coatings were designed. Accelerated tests were carried out by means of a salt-spray (fog) chamber and a 100% relative humidity cabinet. A statistical analysis was performed considering simultaneous ways of dry-film blistering resistance and anticorrosive behaviour. Results indicated that it was possible to incorporate an extender of high-oil absorption as a spacer of the lamellar zinc particles and also an inhibitor to improve the performance. Note de contenu : - Formulation and manufacture of primers : Inhibiting pigment and extender - Film-forming material - Pigment composition - Pigment volume concentration - Pigment dispersion - Experimental method - Table 1 : Characteristics of metallic zinc inhibiting pigment and extender - Table 2 : Identification of modified primers - Table 3 : Composition of sealer, percentage in weight - Table 4 : Lamellar zinc-rich coatings. Salt fog chamber (ASTM B 117, 1500 hours). Degree of rusting, ASTM D 1654 - Table 5 : Modified lamellar zinc. Salt fog chamber (ASTM B 117, 1500 hours). Degree of rusting, ASTM D 1654 - Table 6 : Lamellar zinc-rich coatings. 100 % relative humidity chamber (ASTM D 2247, 5OO hours). Degree of blistering, ASTM D 714 - Table 7 : Modified lamellar zinc. 100 % relative humidity chamber (ASTM D 2247, 500 hours). Degree of blistering, ASTM D 714 - Table 8 : Sum values of degree of rusting and degree of blistering for the lamellar zinc primers DOI : 10.1007/BF02699667 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699667.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5284 [article]

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Adaptive speckle imaging interferometry (ASH) : New technology for advanced drying analysis of coatings / A. Brun in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B3 (09/2006)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B3 (09/2006) . - p. 251-254 Titre : Adaptive speckle imaging interferometry (ASH) : New technology for advanced drying analysis of coatings Type de document : texte imprimé Auteurs : A. Brun, Auteur ; P. Snabre, Auteur ; L. Brunel, Auteur Année de publication : 2006 Article en page(s) : p. 251-254 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse optique Formation de film Revêtement -- Séchage Revêtements -- Analyse Revêtements en phase aqueuse -- Séchage Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : In this work a new optical technology, ASII, is presented, for the study of film formation from all kinds of dispersed systems, such as latexes, emulsions or solvent-borne suspensions. Various film-forming products have been investigated, including water-borne coatings, on various types of substrates. A wide range of information can be extracted such as objective drying times (dust-free, dry-hard times, etc) or mechanism taking place, thereby offering new possibilities to analyse film formation from complex colloidal systems. Note de contenu : - Measurement principle - Adaptive data processing : Analysis depth - Examples of drying kinetics DOI : 10.1007/BF02699668 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699668.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5285 [article]

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The influence of perfluoropolyether silane structural modification on performance when used as surface treatment agents / Yasuo Itami in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B3 (09/2006)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B3 (09/2006) . - p. 255-258 Titre : The influence of perfluoropolyether silane structural modification on performance when used as surface treatment agents Type de document : texte imprimé Auteurs : Yasuo Itami, Auteur ; T. Masutani, Auteur ; Yasuhiro Nakai, Auteur ; Don Kleyer, Auteur ; Peter Hupfield, Auteur Année de publication : 2006 Article en page(s) : p. 255-258 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Angle de contact Hydrophobie Oléophobie Perfluoropolyéther Résistance à l'abrasion Revêtements antisalissures Revêtements organiques Silanes Index. décimale : 667.9 Revêtements et enduits Résumé : Imparting oil and water repellency on surfaces is easily achieved with the use of fluoroalkyl-modified silanes. Whilst perfluoroalkyl-modified silanes exhibit high static and advancing water and oil contact angles, their low receding contact angles mean that water and oil will not readily slide over treated surfaces. However, modified perfluoropolyether (PFPE) silanes, whilst exhibiting high static and advancing water and oil contact angles, also exhibit high receding contact angles, resulting in surfaces where the sliding contact angle is very low. The influence of structure modification of the silane and the perfluoropolyether component are examined along with the organic linking group. Their impact on performance using both the dip coating method and the chemical vapour adsorption method is discussed. Note de contenu : - Fig. 1 : Synthesis of acyl fluoride terminated perfluoropolyether (PFPE) - Fig. 2 : Synthesis of unsaturated perfluoropolyether derivatives - Fig. 3 : Synthesis of alkoxysilyl perluoropolyether adducts - Fig. 4 : Synthesis of oligomerised alkoxysilyl modified perfluoropolyether - Fig. 5 : Summary of application methods for glass test pieces - Fig. 6 : Impact of UV irradiation on static water contact angles - Fig. 7 : Impact of abrasion resistance on static water contact angles - Table 1 : Contact angle data for treated glass surfaces - Table 2 : The impact of perfluoroether molecular weight - Table 3 : Impact of the application method on the water contact angle DOI : 10.1007/BF02699669 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699669.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5379 [article]

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