Modification of polyether ether ketone by low-temperature plasma and ion implantation method for use in medicine and bio
- PDF / 742,311 Bytes
- 7 Pages / 612 x 792 pts (letter) Page_size
- 80 Downloads / 239 Views
1409
Reviews Modification of polyether ether ketone by low-temperature plasma and ion implantation method for use in medicine and biology* A. B. Gilman, M. S. Piskarev, and A. A. Kuznetsov N. S. Enikolopov Institute of Synthetic Polymer Materials, Russian Academy of Sciences, 70 ul. Profsoyuznaya, 117393 Moscow, Russian Federation. Fax: +7 (495) 718 3404. E-mail: [email protected] The review concerns modification of polyether ether ketone (PEEK) using low-temperature plasma and ion implantation and presents the results of studies on the surface properties of modified PEEK samples obtained by wetting angle measurements, X-ray photoelectron spectroscopy, Fourier-IR-spectroscopy, scanning electron microscopy, and atomic force microscopy. This made it possible to investigate changes in the hydrophilicity, chemical structure, and morphology of the modified PEEK surface. The thermal and mechanical properties of the plasma-treated polymer are analyzed. Examples of biomedical applications of the modified PEEK are given. Key words: polyether ether ketone, surface modification, low-temperature plasma, ion implantation, hydrophilicity, chemical structure, surface morphology, biomedical applications.
Biomedical applications of synthetic polymeric materials extend continuously.1—6 Medical polymers for in vivo applications should be biocompatible, i.e., materials should be able to integrate into the body and perform a specified function without inducing adverse effects. Biocompatible polymers can be divided into two groups, viz., biodegradable (L,L-polylactide (PLA), poly(D,L-lactide-co-glycolide), aliphatic polyethers, etc.) and bioinert ones. Unlike biodegradable polymers whose durability in organisms is limited to a prescribed period of time, bioinert materials should retain their structure and properties as long as * Dedicated to Academician of the Russian Academy of Sciences A. M. Muzafarov on the occasion of his 70th birthday.
possible. They are used to produce screws, heart valves, orthodontics products, etc. The most important requirements for bioinert materials include chemical and biological stability, the absence of toxic low-molecular-weight impurities, and high physicomechanical properties. They are to one degree or another met by polyether ether ketone (PEEK), polyfluorinated olefins, ultra-highmolecular-weight polyethylene, and poly(ethylene terephthalate). Among them, of particular importance is PEEK, a partially crystalline polymer with high chemical and hydrolytic stability and excellent physicomechanical and thermal properties. Indeed, PEEK is characterized by an elastic modulus Е of 4.2 GPa, a breaking strain of 15—17%, a glass transition temperature of 145 С, a melt-
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1409—1415, August, 2020. 1066-5285/20/6908-1409 © 2020 Springer Science+Business Media LLC
1410
Gilman et al.
Russ. Chem. Bull., Int. Ed., Vol. 69, No. 8, August, 2020
ing point of 343 С, and long-term operating temperatures to 260 С. Again, the polymer is hydrolyti
Data Loading...
