Ion Beam Optimized Mechanical Characteristics of Glassy Polymeric Carbon for Medical Applications
- Department of Physics and Mathematics - FFCLRP - USP, Ribeirao Preto, SP (Brazil)
- Department of Physics and Chemistry, UNESP, Guaratingueta, SP (Brazil)
- Center for Irradiation of Materials, Alabama A and M University, Normal, AL (United States)
- Oak Ridge National Laboratory, SMAC, Oak Ridge, TN (United States)
Glassy Polymeric Carbon (GPC) has medical applications owing to its inertness and biocompatible characteristics. Commercial GPC prosthetics include mitral, aortic and hydrocephalic valves. Surface treatment of GPC increases the adhesion of endothelic tissue on GPC and avoids the occurrence of thrombus in cardiac implant. In this work, ion beam was used to improve the mechanical characteristics of GPC surface. Hardness was measured as a function of depth in precursor and GPC samples heat treated from 300 to 2500 deg. C before and after bombardment with energetic ions of silicon, carbon, oxygen and gold at energies of 5, 6, 8 and 10 MeV and fluences between 1.0x1013 and 1.0x1016 ions/cm2. Comparison shows that hardness increases of the bombarded samples depend on heat treatment temperature. We verify that ion bombardment promotes carbonization due to an increased linkage between the chains of the polymeric material in lateral groups that are more numerous for samples heat treated to 700 deg. C.
- OSTI ID:
- 20632550
- Journal Information:
- AIP Conference Proceedings, Vol. 680, Issue 1; Conference: 17. international conference on the application of accelerators in research and industry, Denton, TX (United States), 12-16 Nov 2002; Other Information: DOI: 10.1063/1.1619912; (c) 2003 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Surface treatment of Glassy Polymeric Carbon artifacts for medical applications
Permeability control of GPC drug delivery by ion implantation