| Titre : |
Effects of pigmentation on siloxane-polyurethane coatings and their performance as fouling-release marine coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Stacy A. Sommer, Auteur ; Joseph R. Byrom, Auteur ; Hanna D. Fischer, Auteur ; Rajan B. Bodkhe, Auteur ; Shane J. Stafslien, Auteur ; Justin W. Daniels, Auteur ; Carolyn Yehle, Auteur ; Dean C. Webster, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 661-670 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Marines (peinture)
Polyuréthanes
Revêtements autostratifiants:Peinture autostratifiante
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).
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Siloxane-polyurethane paints were formulated and characterized for coating properties and performance as fouling-release (FR) marine coatings. Paints were formulated at 20 and 30 pigment volume concentrations with titanium dioxide, and aminopropyl-terminated poly (dimethylsiloxane) (APT-PDMS) loadings were varied from 0 to 30% based on binder mass. The coatings were characterized for water contact angle, surface energy (SE), gloss, and pseudo-barnacle (PB) adhesion. The assessment of the FR performance compared with polyurethane (PU) and silicone standards through the use of laboratory biological assays was also performed. Biofilm retention and adhesion were conducted with the marine bacterium Cellulophaga lytica, and the microalgae diatom Navicula incerta. Live adult barnacle reattachment using Amphibalanus amphitrite was also performed. The pigmented coatings were found to have properties and FR performance similar to those prepared without pigment. However, a higher loading of PDMS was required, in some cases, to obtain the same properties as coatings prepared without pigment. These coatings rely on a self-stratification mechanism to bring the PDMS to the coating surface. The slight reduction in water contact angle (WCA) and increase in pseudobarnacle release force with pigmentation suggests that pigmentation slowed or interfered with the self-stratification mechanism. However, increasing the PDMS loading is an apparent method for overcoming this issue, allowing for coatings having similar properties as those of clear coatings and FR performance similar to those of silicone standard coatings. |
| Note de contenu : |
- Materials
- Acrylic polyol preparation and characterization
- APT-PDSM preparation
- Rapid GPC
- Pigment grind preparation
- Pigmented siloxan-polyurethane coating formulation
- Siloxane-polyurethane preparation
- WCA and SE characterizations
- Gloss
- Pseudobarnacle (PB) adhesion
- Preleaching andleachate toxicity analysis
- Cellulophaga lytica biofilm retention and adhesion
- Navicula incerta attachment and adhesion
- Amphibalanus amphitrite adult barnacle reattachment assay |
| DOI : |
10.1007/s11998-011-9340-3 |
| En ligne : |
http://download.springer.com/static/pdf/657/art%253A10.1007%252Fs11998-011-9340- [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12593 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 6 (11/2011) . - p. 661-670
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