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Auteur Abdullah Ekin
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North Dakota State University - Fargo - North Dakota - USA
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An improved laboratory reattachment method for the rapid assessment of adult barnacle adhesion strength to fouling-release marine coatings / Shane J. Stafslien in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 6 (11/2012)
[article]
Titre : An improved laboratory reattachment method for the rapid assessment of adult barnacle adhesion strength to fouling-release marine coatings Type de document : texte imprimé Auteurs : Shane J. Stafslien, Auteur ; Justin W. Daniels, Auteur ; James A. Bahr, Auteur ; Bret J. Chisholm, Auteur ; Abdullah Ekin, Auteur ; Dean C. Webster, Auteur ; Beatriz Orihuela, Auteur ; Daniel Rittschof, Auteur Année de publication : 2012 Article en page(s) : p. 651-665 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Crustacés
Marines (peinture)
Revêtements antisalissures:Peinture antisalissures
Test d'immersionIndex. décimale : 667.9 Revêtements et enduits Résumé : Modifications have been made to the previously described adult barnacle laboratory reattachment method to enhance and improve the overall utility of this technique for rapidly assessing the efficacy of novel fouling-release marine coating technologies. These modifications include the use of an immobilization template to secure barnacles onto the coating surfaces during the underwater reattachment process, the development of a semi-automated push-off device to enable consistent and reproducible force gauge measurements and the implementation of a software tool to measure the diameter of barnacle base plates for adhesion strength calculations. A series of experimental siloxane–polyurethane and control coatings were evaluated with both the original and improved laboratory reattachment methodologies. Significantly higher adhesion strengths were obtained on these coatings using the improved reattachment method. Furthermore, only the improved reattachment method was able to discern significant differences in the performance of the siloxane–polyurethane coatings based on differences in compositional components. In this regard, the siloxane–polyurethane coatings containing the poly-caprolactone end groups attached to the poly(dimethylsiloxane) (PDMS) backbone exhibited significantly higher reattached barnacle adhesion strengths than the aminopropyl-terminated PDMS containing coatings. It was also shown that the utilization of barnacles with 5–6 mm base plate diameters, rather than 7–8 mm diameters, significantly enhanced the strength or tenacity of adhesion to the surface of the control coatings. The results of the improved laboratory reattachment evaluation of experimental siloxane–polyurethane and control coatings were in good agreement with barnacle adhesion measurements obtained for the same coatings with static ocean immersion testing in the field. Note de contenu : - EXPERIMENTAL : Coating preparation - Rearing and maintenance of adult barnacles - Reattachment procedure - Measurement of barnacle adhesion in shear - Static ocean immersion testing - Statistical analysis
- RESULTS :Original vs improved laboratory reattachment method - Effect of barnacle basal diameter - Static ocean immersion testingDOI : 10.1007/s11998-012-9409-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9409-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16648
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 6 (11/2012) . - p. 651-665[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14359 - Périodique Bibliothèque principale Documentaires Disponible Combinatorial approach to study the effect of acrylic polyol composition on the properties of crosslinked siloxane-polyurethane fouling-release coatings / Robert J. Pieper in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 4 (12/2007)
[article]
Titre : Combinatorial approach to study the effect of acrylic polyol composition on the properties of crosslinked siloxane-polyurethane fouling-release coatings Type de document : texte imprimé Auteurs : Robert J. Pieper, Auteur ; Abdullah Ekin, Auteur ; Dean C. Webster, Auteur ; Franck Cassé, Auteur ; J. A. Callow, Auteur ; Maureen E. Callow, Auteur Année de publication : 2008 Article en page(s) : p. 453-461 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse thermique
Angle de contact
Chimie combinatoire
Chromatographie sur gel
Polyacryliques
Polyuréthanes
Résistance à la salissure
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Revêtements antisalissures:Peinture antisalissures
Salissures biologiques
Salissures marines
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).
Transition vitreuseIndex. décimale : 667.9 Revêtements et enduits Résumé : The effect of acrylic polyol composition on the properties of crosslinked siloxane-polyurethane coatings was explored. An acrylic polyol library was synthesized using batch solution polymerization and characterized using high-throughput gel permeation chromatography (Rapid-GPC) and differential scanning calorimetry (DSC). Siloxane-polyurethane coatings were prepared from 3-aminopropyl-terminated poly(dimethylsiloxane) (PDMS), the acrylic polyols and a polyisocyanate crosslinker. The siloxane-acrylicpolyurethane coatings were tested for mechanical and physical properties. The siloxane-polyurethane coatings had a systematic variation in glass transition temperature and had water contact angles ranging from 95° to 100°. Many of the coatings also showed a low-force of release in the pseudo-barnacle pull-off adhesion test. Performance testing of the fouling-release properties of the siloxane-polyurethane coatings on array panels with algae, namely the diatom Navicula and sporelings (young plants) of the green seaweed Ulva was also conducted. DOI : 10.1007/s11998-007-9032-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9032-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3632
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 4, N° 4 (12/2007) . - p. 453-461[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 009005 - Périodique Bibliothèque principale Documentaires Disponible Synthesis, formulation, and characterization of siloxane-polyurethane coatings for underwater marine applications using combinatorial high-throughput experimentation / Abdullah Ekin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 4 (12/2007)
[article]
Titre : Synthesis, formulation, and characterization of siloxane-polyurethane coatings for underwater marine applications using combinatorial high-throughput experimentation Type de document : texte imprimé Auteurs : Abdullah Ekin, Auteur ; Dean C. Webster, Auteur ; Justin W. Daniels, Auteur ; Shane J. Stafslien, Auteur ; Franck Cassé, Auteur ; J. A. Callow, Auteur ; Maureen E. Callow, Auteur Année de publication : 2008 Article en page(s) : p. 435-451 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Alliages polymères
Caractérisation
Chimie combinatoire
Copolymères séquencés
Criblage haut-débit
Marines (peinture)
Poly-e-caprolactone
Polyaddition
PolydiméthylsiloxaneLe polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones.
Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone.
Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK).
La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones.
Polylactones
Polyuréthanes
Revêtements antisalissures:Peinture antisalissures
Salissures biologiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Crosslinked siloxane-polyurethane coatings were designed, synthesized, formulated, applied, and characterized using combinatorial high-throughput experimentation and eight coatings were selected as candidates for further characterization. First, 72 novel hydroxyalkyl carbamate and dihydroxyalkyl carbamate-terminated poly(dimethylsiloxane) (PDMS) oligomers and their carbamate-linked block copolymers with poly(e-caprolactone) (PCL) were synthesized using a high-throughput synthesis system. These PDMS oligomers and block copolymers were characterized for their molecular weight using high-throughput Gel Permeation Chromatography (Rapid-GPC). The 72 oligomers were then incorporated into siloxane-polyurethane formulations at four different levels resulting in 288 coatings. After initial screening of these 288 coatings, eight coatings were selected for further characterization. Differential scanning calorimetry, dynamic mechanical analysis, X-ray photoelectron spectroscopy and surface energy analysis demonstrate the presence of PDMS on the surface with a polyurethane underlayer. Pseudo-barnacle adhesion and the attachment strength of reattached live barnacles (Balanus amphitrite) were in good agreement. Out of the eight coatings that were down-selected, two coatings performed well in algal (Ulva), bacterial (Cytophaga lytica, Halomonas pacifica), and barnacle (Balanus amphitrite) laboratory screening assays and are potential candidates for ocean testing. DOI : 10.1007/s11998-007-9039-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9039-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3631
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Code-barres Cote Support Localisation Section Disponibilité 009005 - Périodique Bibliothèque principale Documentaires Disponible