Synthesis of New Polyether Ether Ketone Derivatives with Silver Binding Site and Coordination Compounds of Their Monomers with Different Silver Salts
1
Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700 Fribourg, Switzerland
2
Fribourg Center for Nanomaterials, FriMat, Department of Physics, University of Fribourg, Chemin du Musée 3, 1700 Fribourg, Switzerland
*
Author to whom correspondence should be addressed.
Academic Editor: Jianxun Ding
Polymers 2016, 8(6), 208; https://doi.org/10.3390/polym8060208
Received: 15 March 2016 / Revised: 13 May 2016 / Accepted: 19 May 2016 / Published: 30 May 2016
(This article belongs to the Special Issue Functional Polymers for Medical Applications)
Polyether ether ketone (PEEK) is a well-known polymer used for implants and devices, especially spinal ones. To overcome the biomaterial related infection risks, 4-4′-difluorobenzophenone, the famous PEEK monomer, was modified in order to introduce binding sites for silver ions, which are well known for their antimicrobial activity. The complexation of these new monomers with different silver salts was studied. Crystal structures of different intermediates were obtained with a linear coordination between two pyridine groups and the silver ions in all cases. The mechanical and thermal properties of different new polymers were characterized. The synthesized PEEKN5 polymers showed similar properties than the PEEK ones whereas the PEEKN7 polymers showed similar thermal properties but the mechanical properties are not as good as the ones of PEEK. To improve these properties, these polymers were complexed with silver nitrate in order to “cross-link” with silver ions. The presence of ionic silver in the polymer was then confirmed by thermogravimetric analysis (TGA) and X-ray powder diffraction (XRPD). Finally, a silver-based antimicrobial compound was successfully coated on the surface of PEEKN5.
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MDPI and ACS Style
Girard, J.; Joset, N.; Crochet, A.; Tan, M.; Holzheu, A.; Brunetto, P.S.; Fromm, K.M. Synthesis of New Polyether Ether Ketone Derivatives with Silver Binding Site and Coordination Compounds of Their Monomers with Different Silver Salts. Polymers 2016, 8, 208.
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