Fluorinated polyurethane coatings with adaptable surface properties / Mariëlle Wouters in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B1 (03/2006)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B1 (03/2006) . - p. 23-30 Titre : Fluorinated polyurethane coatings with adaptable surface properties Type de document : texte imprimé Auteurs : Mariëlle Wouters, Auteur ; Joyce van Zanten, Auteur ; Teun Vereijken, Auteur ; J. D. Bakker, Auteur ; J. Klijnstra, Auteur Année de publication : 2006 Article en page(s) : p. 23-30 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biofilms Energie de surface Fluoropolymères Formulation (Génie chimique) Polyuréthanes Revêtements antisalissures:Peinture antisalissures Index. décimale : 667.9 Revêtements et enduits Résumé : Polyurethane coatings with different network compositions were prepared in well-defined model systems as well as commercially-available formulations. The properties, such as glass-transition temperature, hardness and surface free energy, of the model network were tuned by the choice of the ingredients. All coatings were studied with respect to their bulk properties as well as their surface properties. It was found that by the addition of a fluorinated additive, the surface free energy of the coating was lowered by approximately 15mNm−1, leaving the bulk properties intact. It was also shown that these polyurethane coatings are able to adapt their surface free energy in a reversible manner when exposed to water. The magnitude and rate of surface rearrangement is strongly dependent on the network density of the coating. The effect of coating properties on the formation of a biofilm and subsequent adhesion of diatoms was studied on a selection of the coatings used in this study, and the results obtained are discussed. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Coating preparation - Coating characterisation - Exposure testing - RESULTS AND DISCUSSION : Model polyurethane coating - Diatom testing - Table 1 : Ingredients of the studied coatings - Table 2 : Composition of the coating formulations - Table 3 : Elastomeric model coatings - Table 4 : Glassy fluorinated coatings - Table 5 : Effect of length of fluorinated tail - Table 6 : Coating properties of commercially-available PU coatings DOI : 10.1007/BF02699611 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699611.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5392 [article]

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Surface rearrangement of tailored polyurethane-based coatings / Mariëlle Wouters in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 6 (04/2005)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 2, N° 6 (04/2005) . - p. 435-443 Titre : Surface rearrangement of tailored polyurethane-based coatings Type de document : texte imprimé Auteurs : Mariëlle Wouters, Auteur ; Teun Vereijken, Auteur ; Frank Huijs, Auteur ; Joyce van Zanten, Auteur Année de publication : 2005 Article en page(s) : p. 435-443 Note générale : Bibliogr. Langues : Américain (ame) Tags : Réarrangement  surface  Structure  moléculaire  Caoutchouc  thermoplastique  Propriété  mécanique  Etude  expérimentale  Dureté  Résistance  rayure  Analyse  Milieu  aqueux  Immersion  Densité  réticulation  Relation  structure  propriété  Angle  contact  composition  Polymère  fluor  Matériau  revêtement  Uréthanne  élastomère Index. décimale : 667.9 Revêtements et enduits Résumé : Polyurethane coatings with different network composition were prepared from an oligomeric diol, a diisocyanate, and a low molecular weight triol. The glass transition temperature of the network was tuned by the ratio of diol and triol and the composition (aromatic or aliphatic) of the diisocyanate. All coatings were studied for their bulk properties as well as their surface properties. It was found that by the addition of a fluorinated additive the surface free energy of the coating was lowered by approximately 15 mN.m-1, leaving the bulk properties intact. It was also shown that these polyurethane coatings are able to adapt their surface free energy in a reversible manner when exposed to water. The magnitude and rate of surface rearrangement is strongly dependent on the network density of the coating. DOI : 10.1007/BF02733886 En ligne : https://link.springer.com/content/pdf/10.1007%2FBF02733886.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3838 [article]

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