Effect of curing process on simulated antisoiling properties of sol–gel coating on pine sapwood / Juha Nikkola in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 4 (07/2010)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 4 (07/2010) . - p. 441-448 Titre : Effect of curing process on simulated antisoiling properties of sol–gel coating on pine sapwood Type de document : texte imprimé Auteurs : Juha Nikkola, Auteur ; Riitta Mahlberg, Auteur ; Juha Mannila, Auteur ; Saila Jämsä, Auteur Année de publication : 2010 Article en page(s) : p. 441-448 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bois -- Revêtements protecteurs Matériaux hybrides Revêtements:Peinture Sol-gel, Procédé Tags : 'Revêtement  hybride'  'Propriétés  antisalissures'  'Aubier  du  pin'  Hydrophobicité  Oléophobicité Index. décimale : 667.9 Revêtements et enduits Résumé : Recently, inorganic–organic hybrid coatings produced by the sol–gel route have proven to be a potential protective treatment for wooden surfaces. In this study, the effect of curing process on simulated antisoiling properties of sol–gel coating was investigated. The sol–gel coating was spray-coated on pine sapwood and cured with different temperature and time combinations. The antisoiling properties were studied by measuring the water contact angle of the coating after different curing processes. In addition, abrasion resistance and contact angle of oleic acid were measured. An optical profilometer was used to investigate surface roughness of the coating. Sufficient hydro- and oleophobicity were obtained with all of the curing parameters. The comparison between curing parameters showed that lower temperature and 1–3 h curing time leads to significant improvement in the durability of the water and oil repellent properties of the coating. DOI : 10.1007/s11998-009-9217-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9217-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9766 [article]

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Hydrophobization, smoothing, and barrier improvements of cellulose nanofibril films by sol–gel coatings / Jari Vartiainen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 1 (01/2020) . - p. 305-314 Titre : Hydrophobization, smoothing, and barrier improvements of cellulose nanofibril films by sol–gel coatings Type de document : texte imprimé Auteurs : Jari Vartiainen, Auteur ; Klaus Rose, Auteur ; Yukihiro Kusano, Auteur ; Juha Mannila, Auteur ; Lisa Wikström, Auteur Année de publication : 2020 Article en page(s) : p. 305-314 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact Brillance (optique) Cellulose La cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules. Copolymères Couches minces Hydrophobie Matériaux -- Propriétés barrières Matières plastiques -- Revêtement Microscopie électronique à balayage Nanofibres Rugosité Sol-gel, Procédé Index. décimale : 667.9 Revêtements et enduits Résumé : Single-layer films from cellulose nanofibrils on a plastic support were coated with sol–gel coated with inorganic–organic copolymers (ORMOCER®s), consisting of inorganic Si–O–Si-based networks combined with ceramic (Al–O– and Zr–O–) groups and special organic fluoroalkyl chain containing functional groups. Sol–gel coatings decreased the surface hydrophilicity and water vapor transmission rate. The water contact angle of uncoated films was 24°, indicating high affinity between water and the cellulose nanofibrils. All sol–gel coatings tested increased the surface hydrophobicity with the contact angles ranging between 54° and 102°. The water vapor transmission rates varied between 230 and 410 g/m2/day. With UV curable highly organically crosslinked coating, the water vapor transmission rate was decreased by 77% as compared to uncoated film. The uncoated film had oxygen transmission rates of 0.7 and 107 cc/m2/day at 50% and 80% RH, respectively. At high humidity conditions, the films tended to swell, thus allowing permeation to increase. Sol–gel coatings significantly improved the oxygen barrier properties especially at 80% RH. The transmission rates varied between 0.4 and 0.5 cc/m2/day (50% RH) and between 51 and 86 cc/m2/day (80% RH). Note de contenu : - Cellulose nanofibrils (CNF) and CNF films - Sol-gel coatings - Scanning electron microscopy (SEM) - Roughness - Gloss - Contact angle measurements - Oxygen permeation - Water vapor permeation DOI : 10.1007/s11998-019-00292-5 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00292-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33747 [article]

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Sol–gel based protective coatings for copper products / Juha Nikkola in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 3 (09/2008)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 5, N° 3 (09/2008) . - p. 335-344 Titre : Sol–gel based protective coatings for copper products Type de document : texte imprimé Auteurs : Juha Nikkola, Auteur ; Juha Mannila, Auteur ; Riitta Mahlberg, Auteur ; Jarmo Siivinen, Auteur ; Mika Kolari, Auteur ; Amar Mahiout, Auteur Année de publication : 2008 Article en page(s) : p. 335-344 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuivre Métaux -- Revêtements protecteurs Sol-gel, Procédé Index. décimale : 667.9 Revêtements et enduits Résumé : Corrosion, fouling, and wearing of metal surfaces are the most common problems faced in industry as well as in environmental use. In the recent study, sol–gel based protective coatings were developed and deposited on different copper substrates. Different chemical pretreatments were used to enhance the adhesion and spreadability of coatings on copper surfaces. Substantial improvement of the corrosion resistance of sol–gel coated copper surfaces was obtained by a salt spray test. In addition, the sol–gel coatings increased hydrophobic and easy-to-clean properties of the copper surface. Variation of the curing temperature of the coatings caused changes in the morphology, adhesion, and topography of the sol–gel coatings. On the basis of the important information obtained in this study, the protective properties of sol–gel coatings can be tailored for copper and copper alloy substrates. DOI : 10.1007/s11998-007-9069-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9069-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2977 [article]

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