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Model-free estimation of outdoor performance of a model epoxy coating system using accelerated test laboratory data / Brian Dickens in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 4 (12/2009) . - p. 419-428 Titre : Model-free estimation of outdoor performance of a model epoxy coating system using accelerated test laboratory data Type de document : texte imprimé Auteurs : Brian Dickens, Auteur Année de publication : 2009 Article en page(s) : p. 419-428 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Epoxy  coating'  'Accelerated  service  life  test'  'Model-free  exposure  prediction'  'Computerized  estimation  procedure'  'NIST  SPHERE'  computer  life' Index. décimale : 667.9 Revêtements et enduits Résumé : Laboratory and field exposure results for thin transparent films of a model epoxy coating system have been successfully linked using both dosage and dose, assuming only that the additivity law and the reciprocity law are valid. This paper describes the technique used in the linkage step. Laboratory exposures were carried out on the National Institute of Standards and Technology (NIST) Simulated Photodegradation by High Energy Radiant Exposures (SPHERE) using a factorial design of four temperatures, four relative humidities, four ultraviolet-visible ranges, and four neutral density filters. Similar specimens were exposed on the roof of a NIST laboratory in Gaithersburg, MD. The temperature and relative humidity of the outdoor exposures and the solar spectrum were used to characterize the roof environment at 12 min intervals. Chemical degradation of all specimens was followed by transmission Fourier Transform Infrared (FTIR) spectra. Dose, the radiation incident on the specimens, was estimated from lamp and filter spectra for the SPHERE exposures and from the solar spectra for outdoor exposures. Specimen UV–visible absorbance spectra were used with the estimates of dose to give estimates of dosage—the energy absorbed by the specimens. Using filter ranges for the SPHERE data allowed estimation of relative degradation efficiency over the range of the solar spectrum. This was used implicitly by the computer program to estimate the degradation in specimens exposed outdoors. The paper describes a model-free heuristic approach that automatically predicts chemical degradation outdoors using the outdoor environment parameters and the SPHERE laboratory data. That both dose and dosage are equally valid methods of successfully predicting outdoor degradation may be a consequence of all the films being approximately the same thickness (about 6 µm). DOI : 10.1007/s11998-009-9169-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9169-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7686 [article]

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A new acceleration factor for the testing of corrosion protective coatings : flow-induced coating degradation / Yechun Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 4 (12/2009) . - p. 429-436 Titre : A new acceleration factor for the testing of corrosion protective coatings : flow-induced coating degradation Type de document : texte imprimé Auteurs : Yechun Wang, Auteur ; Gordon P. Bierwagen, Auteur Année de publication : 2009 Article en page(s) : p. 429-436 Note générale : Bibliogr. Langues : Américain (ame) Tags : Flow-induced  corrosion  Coatings  Acceleration  tests  EIS Index. décimale : 667.9 Revêtements et enduits Résumé : For corrosion protective coatings that are designed to give lifetimes of protection that may extend to 50 years, valid accelerated test methods are necessary to develop improved systems and validate performance. Fluid flow over metals has long been believed to influence the corrosion process. Studies have been focused on the effects of flow rate on the corrosion of bare metals. The influence of fluid flow on the degradation of metal-protective coatings has received less attention. This paper describes a preliminary study on the influence of laminar flow on organic coatings. A Hele-Shaw cell and its associated fluid control apparatuses are incorporated into the electrochemical cell setup. The barrier properties of the coating as a function of immersion time and flow rate have been monitored by electrochemical impedance spectroscopy. We observe that the barrier properties of the coating measured electrochemically decrease exponentially with the increasing flow rate. We propose that the flowing electrolyte solution could be used in acceleration tests for the lifetime prediction of organic coatings as the acceleration of failure we have observed does not appear to change the mechanism of failure. Further analysis is proposed to validate immersion flow rate as a universal accelerating parameter for coating failure. DOI : 10.1007/s11998-008-9161-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9161-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7687 [article]

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Studies of the aging effect on the level of isocyanate residues in polyester-based can coating systems / C. Jiang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 4 (12/2009) Titre : Studies of the aging effect on the level of isocyanate residues in polyester-based can coating systems Type de document : texte imprimé Auteurs : C. Jiang, Auteur ; M. Driffield, Auteur ; E. L. Bradley, Auteur ; Peter K. T. Oldring, Auteur ; P. Cooke, Auteur ; L. Castle, Auteur ; James Thomas Guthrie, Auteur Année de publication : 2009 Note générale : Bibliogr. Langues : Américain (ame) Tags : Polyester  Polyurethane  MEKO-blocked  isocyanate  Migration  Can  coatings  Aging Index. décimale : 667.9 Revêtements et enduits Résumé : A methyl ethyl ketone oxime-blocked isocyanate was used as a crosslinking agent in the curing of polyester–polyurethane (PEPU) can coatings. The completeness of cure was assessed from the amount of residual (un-reacted) isophorone diisocyanate (IPDI) trimer that was presented in the coating after curing. This amount of residual trimer depended strongly on the temperature at which the curing was undertaken and time given for curing. The degree of cure was also assessed, correlating with the reduced IPDI trimer migration potential. The amount of residual IPDI trimer that was extractable from a typical PEPU coating rose markedly (15- to 20-fold) if the wet coating was aged up to 6 months before use. The presence of a TiO2 pigment increased the aging effect. An aluminum flake pigment had an even greater effect. The TiO2 pigment increased aging by different degrees according to the type of surface modification that had been applied to the pigment. The grade having the greatest alumina content, as a result of surface modification, gave the greatest aging. The undesirable effects of aging were counteracted by the addition of more catalyst to the aged coating just before the coating was used to coat panels. Deactivation of the acidic polymerization catalyst system (based on organotin compounds) is thought to be the cause of this aging. These findings have allowed improvements to be made to the specifications of the pigments and the catalysts used, with respect to the consistent industrial production of low migration coatings. DOI : 10.1007/s11998-009-9168-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9168-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7688 [article]

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Evaluation of varnish and paint films using digital image processing, energy dispersive X-ray fluorescence spectrometry, and chemometric tools / Fabiola Manhas in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 4 (12/2009) . - p. 445-455 Titre : Evaluation of varnish and paint films using digital image processing, energy dispersive X-ray fluorescence spectrometry, and chemometric tools Type de document : texte imprimé Auteurs : Fabiola Manhas, Auteur ; Verbi Pereira, Auteur ; Maria Izabel Maretti Silveira Bueno, Auteur Année de publication : 2009 Article en page(s) : p. 445-455 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chimiométrie Evaluation Imagerie numérique Polymères opaques Revêtements -- Analyse:Peinture -- Analyse Spectroscopie de fluorescence Vernis -- Analyse Index. décimale : 667.9 Revêtements et enduits Résumé : This article reports an analytical study of modifications occurring on surfaces coated by 17 varnishes and 10 paints. The surface films were submitted to accelerated laboratory tests and atmospheric environmental exposures. Digital image processing, energy dispersive X-ray fluorescence spectrometry (ED-XRF), and principal component analysis (PCA) were applied. Digitalized images were obtained using a conventional scanner and converted into gray color scale histograms. The data were organized into a matri and analyzed with PCA. This method permits the classification of weatherproofing products according to their performance in the tests, avoiding subjective interpretations. ED-XRF spectra combined with PCA were also efficient for evaluating deterioration processes of varnishes and paints, confirming the results from digitized images. DOI : 10.1007/s11998-009-9165-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9165-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7689 [article]

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A new approach to graft siloxanes to alkyds / Ruby Chakraborty in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 4 (12/2009) . - p. 471-481 Titre : A new approach to graft siloxanes to alkyds Type de document : texte imprimé Auteurs : Ruby Chakraborty, Auteur ; Mrunal Thatte, Auteur ; Mark D. Soucek, Auteur Année de publication : 2009 Article en page(s) : p. 471-481 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymères greffés Copolymères silicone alkydes Oxydation Polyesters insaturés Les résines de polyesters insaturés (UP) sont obtenues par polycondensation d’un ou de plusieurs diacides avec un ou plusieurs glycols, l’un, au moins, des constituants contenant une double liaison éthylénique susceptible de réagir ultérieurement sur un composé vinylique, acrylique ou allylique. Par le terme résine polyester, on désigne en fait la dissolution du prépolymère polyester insaturé dans un solvant copolymérisable, le plus utilisé étant le styrène. C’est sous cette forme liquide que les résines polyesters sont livrées aux transformateurs. Après addition de différents adjuvants, charges et renforts, divers procédés de transformation provoquent, sous l’action d’un système catalytique approprié, la copolymérisation finale de la résine en un objet thermodurcissable. Les polyesters insaturés sont d’un usage relativement ancien (1950), essentiellement dans le bâtiment (moulage au contact). Ils ont connu un renouveau important à partir de 1980, en particulier au niveau des formulations et de la fiabilité des procédés grâce au développement de technologies industrielles de moulage par injection et par compression dans l’industrie automobile. Polymères téléchéliques Revêtements:Peinture Vernis Index. décimale : 667.9 Revêtements et enduits Résumé : This article reports an analytical study of modifications occurring on surfaces coated by 17 varnishes and 10 paints. The surface films were submitted to accelerated laboratory tests and atmospheric environmental exposures. Digital image processing, energy dispersive X-ray fluorescence spectrometry (ED-XRF), and principal component analysis (PCA) were applied. Digitalized images were obtained using a conventional scanner and converted into gray color scale histograms. The data were organized into a matri and analyzed with PCA. This method permits the classification of weatherproofing products according to their performance in the tests, avoiding subjective interpretations. ED-XRF spectra combined with PCA were also efficient for evaluating deterioration processes of varnishes and paints, confirming the results from digitized images. DOI : 10.1007/s11998-008-9155-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9155-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7690 [article]

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Fluorinated additives for stain-resistant matt latex paints / J. Branquinho in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 4 (12/2009) . - p. 483-491 Titre : Fluorinated additives for stain-resistant matt latex paints Type de document : texte imprimé Auteurs : J. Branquinho, Auteur ; J. A. C. Alves, Auteur ; Susana Carvalho, Auteur ; Jorge Moniz, Auteur ; Fernanda Oliveira, Auteur ; M. H. Gil, Auteur Année de publication : 2009 Article en page(s) : p. 483-491 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Fluoropolymères Latex Polyacrylate de butyle Résistance aux taches Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : Latex paints are often preferred over solvent-based paints due to their good gloss and color retention, ease of handling, and lower volatile organic contents. However, matt latex paints tend to show poor stain resistance since they develop highly porous and rough surfaces. In recent years, matt latex paints have been improved in their stain resistance with resulting better cleanability, by adding hydrocarbon acrylic polymers and fluorine-containing compounds. In this work, we prepared fluorinated acrylic emulsions of the copolymer of butyl acrylate (BA) and perfluorobutylethylene (PFBE), which were introduced in latex paint compositions. The properties of the modified paints were evaluated by performing stain resistance tests with several domestic products. It was observed that they had good stain release properties, thus conferring good properties to the final painting system. They contain the self-cleaning behavior typical of fluorinated coatings, which have been proven by the decrease of their surface energies. Since the cleaning procedures of a matt paint film can also impart some gloss increase, the wet and dry burnishes were also evaluated. The results have shown improvements in stain resistance and cleanability of the modified matt latex paints with the maintenance of their stability and the coatings gloss as required. DOI : 10.1007/s11998-009-9170-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9170-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7691 [article]

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Synthesis of polymeric dispersants from renewable DCO fatty acid and their multifunctional behavior in waterborne flat paint / Ravi Dara in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 4 (12/2009) . - p. 493-499 Titre : Synthesis of polymeric dispersants from renewable DCO fatty acid and their multifunctional behavior in waterborne flat paint Type de document : texte imprimé Auteurs : Ravi Dara, Auteur ; Ghanshyam Jaiswal, Auteur ; Girish Mirchandani, Auteur ; Randhir Parmar, Auteur ; Syed Haseebuddin, Auteur ; Gulzar Waghoo, Auteur ; Kumar Ghosh Swapan, Auteur Année de publication : 2009 Article en page(s) : p. 493-499 Note générale : Bibliogr. Langues : Américain (ame) Tags : Dehydrated  castor  oil  fatty  acids  (DCOFA)  Maleic  anhydride  Polymeric-dispersant  Pigment  dispersant  Rheology  modifier  Zeta  potential  Minimum  film-forming  temperature  (MFFT)  Waterborne  flat  paint Index. décimale : 667.9 Revêtements et enduits Résumé : Copolymers containing 50% dehydrated castor oil fatty acids (DCOFA) derived from renewable resources, were synthesized via free radical solvents less polymerization with maleic anhydride, styrene, and butyl acrylate. The copolymer was crosslinked further with polyethylene glycol 400 (PEG 400) to increase its molecular weight. The copolymers with and without crosslinking were then neutralized with sodium hydroxide to prepare polymeric dispersants DFCD1 and DFCD2 respectively in aqueous medium. It was observed via surface-tension measurement that both DFCD1 and DFCD2 transfer to the air–water interface before forming any aggregates, and the ease of forming the aggregates is in the order of DFCD1 > DFCD2. The efficacy of these dispersants was examined in the dispersion of the titanium dioxide pigment and conventional extenders like calcite, talc, and china clay using flow point and zeta potential measurements. The results reveal that DFCD2 improved the dispersing ability for the pigment and extenders studied. The performance of these polymeric dispersants was also studied and compared in waterborne flat paint as a rheology modifier and pigment-dispersing agent. The paint rheology profile and dE data indicate the superior performance of the paint containing dispersant DFCD2. When used in combination with conventional styrene-acrylic latex, DFCD1 and DFCD2 reduced the minimum film-forming temperature (MFFT) of the polymer latex. DOI : 10.1007/s11998-008-9156-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9156-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7692 [article]

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Seed oil based polyester polyols for coatings / John Argyropoulos in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 4 (12/2009) . - p. 501-508 Titre : Seed oil based polyester polyols for coatings Type de document : texte imprimé Auteurs : John Argyropoulos, Auteur ; Paul Popa, Auteur ; Gary Spilman, Auteur ; Debkumar Bhattacharjee, Auteur ; William Koonce, Auteur Année de publication : 2009 Article en page(s) : p. 501-508 Note générale : Bibliogr. Langues : Américain (ame) Tags : Polyester  polyol  Seed  oil  Polyurethane  dispersion  coating  High  solids  Solubility  parameter Index. décimale : 667.9 Revêtements et enduits Résumé : The hydroformylation of seed oil based fatty acid methyl esters leads to aldehyde intermediates that can be hydrogenated to give novel seed oil based monomers. In this study, the seed oil based monomers were polymerized with low molecular weight diols to produce novel aliphatic polyester polyols with very low viscosities. The seed oil polyester polyols provide environmentally friendly (green) coating formulations with low volatile organic compound emissions which lead to coatings with superior physical properties, such as exceptional hydrolytic resistance and flexibility. From these polyester polyols, waterborne polyurethane dispersions were also developed with excellent stability resulting in coatings with superior physical properties (i.e., good toughness and abrasion resistance), and exceptional hydrolytic and acid resistance. DOI : 10.1007/s11998-008-9154-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9154-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7693 [article]

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Effect of C/B ratio in reactants on low-pressure CVD boron-doped carbon deposited from a BCI3-C3H6-H2 mixture / Yongsheng Liu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 4 (12/2009) . - p. 509-515 Titre : Effect of C/B ratio in reactants on low-pressure CVD boron-doped carbon deposited from a BCI3-C3H6-H2 mixture Type de document : texte imprimé Auteurs : Yongsheng Liu, Auteur ; Litong Zhang, Auteur ; Laifei Cheng, Auteur ; Wenbin Yang, Auteur ; Yongdong Xu, Auteur ; Qinfeng Zeng, Auteur Année de publication : 2009 Article en page(s) : p. 509-515 Note générale : Bibliogr. Langues : Américain (ame) Tags : Boron-doped  carbon  Low-pressure  Chemical  vapor  deposition  C/B  ratio Index. décimale : 667.9 Revêtements et enduits Résumé : Propylene was used to fabricate boron-doped carbon coatings by low-pressure chemical vapor deposition. The effects of carbon/boron (C/B) ratio in reactants on the deposition rate, morphologies, and bonding states of the deposits were investigated. Deposition rate increased with increasing C/B ratio, when C/B ratio was less than 4.0. Then, deposition rate decreased with increasing C/B ratio. The maximum rate was 500 nm/h. SEM results showed that cross section morphologies and thickness of deposits were influenced by C/B ratio. Morphologies were compact and not-delaminated with a low C/B ratio, however nanoscale delamination occurred in the deposits with a high C/B ratio. The infiltration characteristic was also influenced by the C/B ratio. The suitable C/B ratio was 1.0–2.0 for infiltration in a T300 carbon bundle. XPS results showed that carbon content is major in the deposits with all C/B ratios. The boron contents decreased and carbon contents increased with increasing C/B ratio. B-sub-C and BC2O were main bonding states. The total contents of B-sub-C and BC2O were above 60.0 at.% with all C/B ratios. DOI : 10.1007/s11998-008-9128-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9128-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7694 [article]

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Ir coating prepared on Mo substrate by double glow plasma / Wang Liangbing in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 4 (12/2009) . - p. 517-522 Titre : Ir coating prepared on Mo substrate by double glow plasma Type de document : texte imprimé Auteurs : Wang Liangbing, Auteur ; Zhaofeng Chen, Auteur ; Pingze Zhang, Auteur ; Wangping Wu, Auteur ; Ying Zhang, Auteur Année de publication : 2009 Article en page(s) : p. 517-522 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 667.9 Revêtements et enduits Résumé : Dense and adherent Ir coating was obtained on the surface of the Mo substrate by double glow plasma, which had a deposition chamber and two cathodes. Argon gas was used as the working gas. The bias voltage of Ir target and Mo substrate were -800 and -300 V, respectively. The chamber pressure was 35 Pa. Microstructure of the Ir coating was observed by scanning electron microscopy. The Ir coating had a polycrystalline structure with preferential growth orientation of (220) crystal plane. The deposition rate was ~3.5 µm/h. The good adhesion resulted from the buffer layer between the Mo substrate and the Ir coating. The buffer layer, a combined Ir and Mo, was formed at the beginning of the deposition. The Mo concentration distributed gradiently along the depth of the buffer layer. DOI : 10.1007/s11998-008-9123-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9123-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7695 [article]

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Thermal conductivity of oriental beech impregnated with fire retardant / Seref Kurt in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 4 (12/2009) . - p. 523-530 Titre : Thermal conductivity of oriental beech impregnated with fire retardant Type de document : texte imprimé Auteurs : Seref Kurt, Auteur ; Burhanettin Uysal, Auteur ; Cemal Özcan, Auteur Année de publication : 2009 Article en page(s) : p. 523-530 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Hêtre Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Revêtements:Peinture Thermocinétique Vernis Index. décimale : 667.9 Revêtements et enduits Résumé : This study aims to describe the effects of wood material (oriental beech) impregnated with ammonium sulfate, borax, boric acid, and zinc chloride by using two different methods (pressure and dipping) and finishes with the effects of different varnishes (polyurethane, cellulosic, synthetic) and paints (cellulosic, synthetic, industrial) on thermal conductivity. These materials were used as fire retardants. The lowest thermal conductivity of 0.143 kcal/m h°C was obtained in oriental beech control samples. The highest thermal conductivity of 0.172 kcal/m h°C was obtained in oriental beech impregnated with ammonium sulfate by using pressure and varnished with synthetic varnish. Consequently, wood impregnated with ammonium sulfate by using pressure and finished with synthetic varnish can be used as a construction material where thermal conductivity is required. Wood impregnated with borax by dipping and finished with cellulosic varnish can be used as a construction material where the insulation is required. DOI : 10.1007/s11998-008-9158-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9158-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7696 [article]

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Phase, microstructure, and oxidation resistance of yttrium silicates coatings prepared by a hydrothermal electrophoretic deposition process for C/C composites / Liu Miao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 4 (12/2009) . - p. 531-535 Titre : Phase, microstructure, and oxidation resistance of yttrium silicates coatings prepared by a hydrothermal electrophoretic deposition process for C/C composites Type de document : texte imprimé Auteurs : Liu Miao, Auteur ; Wu Jianpeng, Auteur ; Cao Liyun, Auteur ; Deng Fei, Auteur ; Zhang Yutaog, Auteur ; Huang Jianfeng, Auteur Année de publication : 2009 Article en page(s) : p. 531-535 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antioxydants Carbure de silicium Composites à fibres de carbone Dépôt électrophorétique Silicate d'yttrium Index. décimale : 667.9 Revêtements et enduits Résumé : Oxidation-resistant yttrium silicates coatings for SiC precoated carbon/carbon composites were prepared by a novel hydrothermal electrophoretic deposition process. Sonochemical-synthesized yttrium silicates nanocrystallites, isopropanol, and iodine were respectively used as source materials, solvent, and charging agent during the deposition. Phase compositions, surface and cross-section microstructures of the as-prepared multilayer coatings were characterized by an X-ray diffractometer (XRD) and a scanning electron microscopy (SEM). The influence of deposition temperatures on the phase, microstructure, and oxidation resistance of the multilayer coated C/C composites was particularly investigated. Results show that the as-prepared outer coatings are composed of yttrium silicates crystallites with a main phase of Y2Si2O7 and Y2SiO5. The thickness and density of the yttrium silicates coatings are improved with the increase of deposition temperature. Compared with SiC coating prepared by pack cementation, the multilayer coatings prepared by pack cementation with a later hydrothermal electrophoretic deposition process exhibit better antioxidation properties. The as-prepared multilayer coatings can effectively protect C/C composites from oxidation at 1773 K in air for 35 h with a weight loss of 0.32 x 10-3 g/cm2. DOI : 10.1007/s11998-008-9122-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9122-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7717 [article]

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Surface modification of polyester nonwoven fabrics by Al203 sol-gel coating / Xueliang Xiao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 4 (12/2009) . - p. 537-541 Titre : Surface modification of polyester nonwoven fabrics by Al203 sol-gel coating Type de document : texte imprimé Auteurs : Xueliang Xiao, Auteur ; Fang Chen, Auteur ; Qufu Wei, Auteur ; Ning Wu, Auteur Année de publication : 2009 Article en page(s) : p. 537-541 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alumine Caractérisation Morphologie (matériaux) Mouillabilité Polyesters Polyéthylène téréphtalate Sol-gel, Procédé Traîtements de surface Index. décimale : 667.9 Revêtements et enduits Résumé : Nonwoven polyester (PET) fabrics have been extensively studied for various applications. However, the nonwoven PET fabrics have poor wettability. In this work, nonwoven PET fabrics were impregnated in a stable and transparent alumina sol that was prepared by the hydrolysis of aluminium isopropoxide using the sol–gel technique. The Al2O3 particles were coated on nonwoven PET fabrics after the rolling-drying process. The surface morphology of modified nonwoven PET fabrics was characterized by scanning electronic microscopy (SEM) and atomic force microscopy (AFM). The SEM and AFM observations revealed the formation of the Al2O3 particles on the fiber surface. The Al2O3 coating was also confirmed by Fourier transform infrared (FTIR). The mechanical properties of the coated nonwoven PET fabrics were investigated using a tensile strength test, and the results showed that the mechanical properties were improved after surface sol–gel coating. The effect of Al2O3 on the wetting behavior of the fabric was also significantly improved. DOI : 10.1007/s11998-008-9157-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9157-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7718 [article]

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The influence of dissolved ozone in a phosphate bath on phosphate coatings on carbon steel / Minqi Sheng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 4 (12/2009) . - p. 543-547 Titre : The influence of dissolved ozone in a phosphate bath on phosphate coatings on carbon steel Type de document : texte imprimé Auteurs : Minqi Sheng, Auteur ; Yinyin Wei, Auteur ; Qindong Zhong, Auteur Année de publication : 2009 Article en page(s) : p. 543-547 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier au carbone Dissolution (chimie) Métaux -- Revêtements protecteurs Ozone Phosphate de zinc Index. décimale : 667.9 Revêtements et enduits Résumé : The influence of dissolved ozone (O3) and its concentrations on the formation of phosphate coatings on carbon steel in phosphate bath, as well as the protective properties of phosphate coatings in a 5 wt% NaCl solution have been studied. The structure, surface morphologies, and phase compositions of the phosphate coating on the carbon steel substrate was investigated by SEM, XRD. It is shown that the phosphate coating became more dense with fewer microholes and an increasing concentration of ozone in phosphate bath in the range of 0.0 to 1.62 mg/L. The coating compositions were Zn3(PO4)2 · 4H2O (hopeite) and Zn2Fe(PO4)2 · 4H2O. Potentiodynamic polarization and immersion tests were used to evaluate the corrosion properties of the treated samples. The coating showed good corrosion resistance properties. DOI : 10.1007/s11998-008-9159-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9159-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7719 [article]

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Preparation and the light transmittance of TiO2 deposited fabrics / Yang Xu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 4 (12/2009) . - p. 549-555 Titre : Preparation and the light transmittance of TiO2 deposited fabrics Type de document : texte imprimé Auteurs : Yang Xu, Auteur ; Ning Wu, Auteur ; Xiubiao Pi, Auteur Année de publication : 2009 Article en page(s) : p. 549-555 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couches minces Dioxyde de titane Fibres polyesters Nanotechnologie Nontissés Rayonnement ultraviolet Transmittance La transmittance, en général, est le rapport caractérisant la transmission d'une grandeur dans un système. Elle se calcule par le rapport entre la grandeur en entrée et en sortie. En optique, la transmittance d'un matériau ou d'un filtre est la fraction du flux lumineux le traversant. Elle est également nommée facteur de transmission mais aussi transparence dans le domaine de la photographie. Index. décimale : 667.9 Revêtements et enduits Résumé : Nanoscale titanium dioxide (TiO2) films were deposited on the surface of polyester nonwovens by using direct current reactive magnetron sputtering. The effect of oxygen flow on the surface structures and properties of the fabrics was investigated in this article. The surface morphology, microstructure, and the chemical composition of TiO2-coated fibers were characterized by atomic force microscope, X-ray diffraction, and X-ray photoelectron spectroscopy. The effect of oxygen flow on deposition rate, white degree, and light transmission properties of the fabrics with nanoscale TiO2 films were examined. The test results proved that the oxygen flow was a key factor in sputter processing. The deposition speed decreased and the white degree of the fabric increased with increasing oxygen flow. The ultra-violet absorption by the polyester nonwoven fabric with TiO2 coatings was also enhanced as the oxygen flow increased in a proper range. DOI : 10.1007/s11998-008-9149-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9149-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7720 [article]

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Drying and collapse of hollow latex / C. M. Cardinal in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 4 (12/2009) . - p. 457-469 Titre : Drying and collapse of hollow latex Type de document : texte imprimé Auteurs : C. M. Cardinal, Auteur ; L. E. Scriven, Auteur ; Lorraine F. Francis, Auteur Année de publication : 2009 Article en page(s) : p. 457-469 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Corps creux Latex Microscopie électronique à balayage Polymères opaques Revêtement -- Séchage:Peinture -- Séchage Index. décimale : 667.9 Revêtements et enduits Résumé : Hollow latex particles are used as white pigments for paints and paper coatings. In the coating dispersion, each hollow particle is filled with water. As the coating dries, water vacates the latex, leaving an air-filled void sized to scatter light (~0.5 µm) within each particle. Examinations of dried coatings reveal that hollow particles can collapse, decreasing their light scattering efficiency. Cryogenic scanning electron microscopy (cryoSEM) was used to characterize the microstructure of coatings containing hollow latex during drying. Images suggest latex voids empty after air invades into the coating interstitial space and collapse occurs late in the drying process. The effects of temperature (10–60°C), humidity (20–80%), and binder concentration (0–30 wt%) on particle collapse were also studied through SEM of dried coating surfaces. High drying temperature, high humidity, and low binder concentrations promoted collapse. For hollow latex particles with porous shell walls, temperature and humidity had little effect, whereas binder increased collapse. From these results, a theoretical model is proposed. During drying, diffusion of water from the particle creates a vacuum inside the latex. The vacuum is either relieved by nucleation of a gas bubble from the dissolved air in the water-filled particle or it causes the particle to collapse by buckling. DOI : 10.1007/s11998-009-9167-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9167-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7721 [article]

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