Underwater captive bubble technique on curved surfaces of blended polydimethylsiloxanes
| Autor: | William E. Collins, Steve K. Pollack, Eric A. Angu, Ryan C. Cameron |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
chemistry.chemical_classification
Materials science Polydimethylsiloxane Ethylene oxide Bubble Surfaces and Interfaces General Chemistry Polymer Polyethylene Surfaces Coatings and Films Contact angle Low-density polyethylene chemistry.chemical_compound chemistry Mechanics of Materials Polymer chemistry Materials Chemistry Underwater Composite material |
| Zdroj: | Journal of Adhesion Science and Technology. 13:1225-1240 |
| ISSN: | 1568-5616 0169-4243 |
| DOI: | 10.1163/156856199x00893 |
| Popis: | A modified underwater captive bubble technique was used to determine the air-water contact angle of water on a series of polymer biomaterials, including polydimethylsiloxane blends. These consisted of unfunctionalized polydimethylsiloxane (PDMS) blended with small percentages of either ethylene oxide (EO)- or phosphorylcholine (PC) ester-terminated polydimethylsiloxanes to increase surface hydrophilicity. The latter was formed by the hydrosilation of a dimethylsilane-terminated polydimethylsiloxane with ω-vinylphosphorylcholine ester. The ester was synthesized from 9-hydroxy-1-decene and 2-chlorotrimethylamine incorporating the phosphoryl functionality. The blends were cast from a dilute solution of chloroform onto low-density polyethylene (LDPE). A comparison of methods to implement the underwater captive bubble (UWCB) technique, the curved UWCB technique or the modified UWCB technique, a convenient method for determining AW on curved surfaces, demonstrated that both methods were accurate and precise. As... |
| Databáze: | OpenAIRE |
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