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Oxygen plasma functionalization of parylene C coating for implants surface: Nanotopography and active sites for drug anchoring
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology.ORCID iD: 0000-0002-6326-4084
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2013 (English)In: Materials science & engineering. C, biomimetic materials, sensors and systems, ISSN 0928-4931, E-ISSN 1873-0191, Vol. 33, no 7, 4221-4227 p.Article in journal (Refereed) Published
Abstract [en]

The effect of oxygen plasma treatment (t = 0.1-60 min, pO2 = 0.2 mbar, P = 50 W) of parylene C implant surface coating was investigated in order to check its influence on morphology (SEM, AFM observations), chemical composition (XPS analysis), hydrophilicity (contact angle measurements) and biocompatibility (MG-63 cell line and Staphylococcus aureus 24167 DSM adhesion screening). The modification procedure leads to oxygen insertion (up to 20 at.%) into the polymer matrix and together with surface topography changes has a dramatic impact on wettability (change of contact angle from θ = 78 ± 2 to θ = 33 ± 1.9 for unmodified and 60 min treated sample, respectively). As a result, the hydrophilic surface of modified parylene C promotes MG-63 cells growth and at the same time does not influence S. aureus adhesion. The obtained results clearly show that the plasma treatment of parylene C surface provides suitable polar groups (C = O, C-O, O-C = O, C-O-O and O-C(O)-O) for further development of the coating functionality.

Place, publisher, year, edition, pages
2013. Vol. 33, no 7, 4221-4227 p.
Keyword [en]
Implant surface, MG-63 cells, Oxygen plasma treatment, Parylene C, Staphylococcus aureus
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-126041DOI: 10.1016/j.msec.2013.06.014ISI: 000325445700086Scopus ID: 2-s2.0-84881146938OAI: oai:DiVA.org:kth-126041DiVA: diva2:641752
Note

QC 20130819

Available from: 2013-08-19 Created: 2013-08-19 Last updated: 2017-12-06Bibliographically approved

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Engvall, Klas

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