| Autor: |
Rajan B. Bodkhe, Dean C. Webster, Nicholas I. Cilz, Justin Daniels, Maureen E. Callow, Shane J. Stafslien, Stephanie E.M. Thompson, James A. Callow |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Progress in Organic Coatings. 75:38-48 |
| ISSN: |
0300-9440 |
| Popis: |
The use of the phenomenon of self-stratification to design polyurethane coatings having amphiphilic surfaces was explored. A novel hydrophobic siloxane polymer having orthogonal carboxylic acid groups was used to create the amphiphilic surface. The acid functional siloxane polymers were synthesized using ring opening equilibration polymerization (ROEP) of two cyclic siloxane monomers and thiol-ene click chemistry was used to introduce pendant carboxylic acid groups. The acid functional siloxane polymers were then used to prepare acid functional siloxane–polyurethane (PDMS-A) coatings. The coatings were characterized for their surface properties using water contact angle (WCA), confocal raman microscopy (CRM), and attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy. The characterization revealed the presence of the acid functional siloxane polymer at the coatings’ surface due to self-stratification. WCA data indicated the coatings became more hydrophilic after immersion in water and artificial seawater (ASW), indicating the presence of the carboxylic acid groups at the surface. The PDMS-A coatings showed excellent fouling-release performance towards microalgae and good release performance towards bacteria. However, macroalga and adult barnacles showed better removal from hydrophobic PDMS-containing coatings compared to the amphiphilic PDMS-A coatings. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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