[article]
| Titre : |
Pigmented silicone/epoxy novel blends for preparation of stratified nontoxic foul release coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Sushil S. Pawar, Auteur ; R. Baloji Naik, Auteur ; Sangram K. Rath, Auteur ; T. K. Mahato, Auteur ; Balasubramanian Kandasubramanian, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
p. 1269-1285 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Alliages polymères
Animaux marins
Anticorrosifs
Anticorrosion
Caractérisation
Concentration pigmentaire volumique
Epoxydes
Essais d'adhésion
Formulation (Génie chimique)
Pigments inorganiques
Revêtements antisalissures
Revêtements autostratifiants
Revêtements organiques
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 : |
Incompatible polymer blends of epoxy and silicone were used for the preparation of single-coating system having anticorrosive and foul release properties by self-stratifying process. The single-coat application consists of a fixed 20 pigment volume concentration (PVC) anticorrosive bottom coat based on epoxy with a mixture of pigments like iron oxide, barytes, and zinc phosphate, and a fixed 10 PVC hydrophobic topcoat consisting of silicone resin and titanium dioxide pigment. Both the coatings were prepared separately in triple role and ball mill, respectively. Three different coating compositions were prepared by mixing silicone and epoxy coatings in different weight ratios (70:30, 80:20, and 90:10). Required amount of hardener, crosslinker, and catalyst were added to these prepared compositions separately prior to application and were thoroughly mixed and applied on mild steel and glass specimens. The prepared stratified coatings were named as STR-1, STR-2, and STR-3. The formation of self-stratification was confirmed by optical microscopy, FE-SEM, FTIR spectroscopy, and contact angle measurement. The coating systems were evaluated for adhesion, tensile strength, corrosion resistance, pseudobarnacle adhesion properties, and accumulation of foulant studies by immersion of test coupons in seawater. It is confirmed that there exists a most favorable stratified coating composition in terms of silicone and epoxy weight ratios which showed performance enhancement in terms of the hydrophobicity and foul release properties compared to other coating compositions. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Preparation of epoxy-based anticorrosive coating (bottom coat) and silicone-based fouling release coating (topcoat) - composition for 10 PVC silicone coating - Formulations of stratified fouling release coatings
- CHARACTERIZATION METHODS : Physical properties - FTIR spectroscopy - Measurement of contact angle - FESEM study - Electrochemical impedance spectroscopy (EIS) - Investigation of pseudobarnacle adhesion strength - Assessment of foul release property of stratified coatings in seawater - Resistance to corrosion under cathodic protection
- Table 1 : The composition for 20 PVC epoxy coating
- Table 2 : The composition for 10 PVC silicone coating
- Table 3 : Physical properties of stratified coatings
- Table 4 : Pseudobarnacle adhesion test of stratified coatings
- Table 5 : Experimental details for resistance to cathodic protection |
| DOI : |
https://doi.org/10.1007/s11998-021-00610-4 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-022-00610-4.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38053 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 4 (07/2022) . - p. 1269-1285
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Pigmented silicone/epoxy novel blends for preparation of stratified nontoxic foul release coatings in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 4 (07/2022)
