Coating process and early stage adhesion evaluation of poly(2-hydroxy-ethyl-methacrylate) hydrogel coating of 316L steel surface for stent applications
| Autor: | Laura Indolfi, Filippo Causa, Paolo A. Netti |
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| Přispěvatelé: | Indolfi, L., Causa, Filippo, Netti, PAOLO ANTONIO |
| Rok vydání: | 2009 |
| Předmět: |
Materials science
Biomedical Engineering Biophysics Bioengineering Surface finish Metal surface Metallic surface engineering.material Prosthesis Design Methacrylate Paint adhesion testing Percutaneous coronary intervention Biomaterials Contact angle Calorimetric analysi Coated Materials Biocompatible Coating Materials Testing Glass transition temperature Composite material Polymeric hydrogel Homogeneous surface Process parameter Coating proce Hydrogels Pull-off adhesion test Adhesion Stainless Steel Blood Vessel Prosthesis 316 L steel Complex surface SEM engineering Stents Surface characteristics Wetting AFM Spray coating Glass transition FT-IR-ATR |
| Zdroj: | Journal of Materials Science: Materials in Medicine. 20:1541-1551 |
| ISSN: | 1573-4838 0957-4530 |
| Popis: | In this study, a spray-coating method has been set up with the aim to control the coating of poly(2-hydroxy-ethyl-methacrylate) (pHEMA), an hydrophilic polymeric hydrogel, onto the complex surface of a 316L steel stent for percutaneous coronary intervention (PCI). By varying process parameters, tuneable thicknesses, from 5 to 20 microm, have been obtained with uniform and homogeneous surface without crack or bridges. Surface characteristics of pHEMA coating onto metal surface have been investigated through FTIR-ATR, contact angle measurement, SEM, EDS and AFM. Moreover, results from Single-Lap-Joint and Pull-Off adhesion tests as well as calorimetric analysis of glass transition temperature suggested that pHEMA deposition is firmly adhered on metallic surface. The pHEMA coating evaluation of roughness, wettability together with its morphological and chemical stability after three cycles of expansion-crimping along with preliminary results after 6 months demonstrates the suitability of the coating for surgical implantation of stent. |
| Databáze: | OpenAIRE |
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