Effect of nitrogen plasma treatment on the crystallinity and self‐bonding of polyetheretherketone (PEEK) for biomedical applications
| Autor: | Firas Awaja, Mariangela Fedel, Victor Micheli, Martin Thaler |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Thermoplastic Polymers and Plastics 02 engineering and technology plasma surface treatment 010402 general chemistry 01 natural sciences Crystallinity polyetheretherketone (PEEK) Peek Composite material Thermal analysis crystallinity Research Articles chemistry.chemical_classification Plasma surface self‐adhesion 021001 nanoscience & nanotechnology Microstructure eye diseases 0104 chemical sciences chemistry Bonding strength Nitrogen plasma sense organs 0210 nano-technology thermal analysis Research Article |
| Zdroj: | Polymers for Advanced Technologies |
| ISSN: | 1042-7147 |
| DOI: | 10.1002/pat.4764 |
| Popis: | Polyetheretherketone (PEEK) is a thermoplastic material with outstanding properties and high potential for biomedical applications, including hermetic encapsulation of active implantable devices. Different biomedical grade PEEK films with initial degree of crystallinity ranging from 8% to 32% (with or without mineral filling) were inspected. PEEK surfaces were treated with nitrogen RF plasma and the effects on materials crystallinity and self‐bonding were evaluated. In particular, the relationship between auto‐adhesive properties and crystalline content of PEEK before and after plasma treatment was examined. PEEK samples showed different bonding strength depending on their degree of crystallinity, with higher self‐bonding performance of mineral‐filled semi‐crystalline films. XRD did not show any modification of the PEEK microstructure as a result of plasma treatment, excluding a significant influence of crystallinity on the self‐bonding mechanisms. Nevertheless, plasma surface treatment successfully improved the self‐bonding strength of all the PEEK films tested, with larger increase in the case of semi‐crystalline unfilled materials. This could be interpreted to the increase in chain mobility that led to interfacial interpenetration of the amorphous phase. |
| Databáze: | OpenAIRE |
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