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Fabrication and Characterization of Modified Polyether Ether Ketone/Carbon Nanofiber Nanocomposite for Bone Application

Ali Mohammadi, Mohammad Reza | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55266 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Ramazani Saadatabadi, Ahmad
  7. Abstract:
  8. The use of polyether ether ketone (PEEK) in bone implants is limited due to a lack of cell adhesion and proliferation. Therefore, in this study, we modified the surface of PEEK with a nanocomposite coating containing piezoelectric and bioactive properties. Sulfonated PEEK with suitable mechanical and hydrophilic properties along with polyvinylidene fluoride was used as a biocompatible polymer with piezoelectric properties for coating. Also, nanohydroxyapatite was used as a bioactive material, and carbon nanofibers with significant mechanical and electrical properties were used in the nanocomposite. The surface was sulfonated as an intermediate layer to improve the connection between the nanocomposite and the polymer surface. Characterization was performed by FTIR and XRD analysis and surface morphology study was conducted by FE-SEM, EDX, and AFM. Based on the results, the adhesion of nanocomposite to the surface was improved due to the presence of the intermediate layer and carbon nanofibers. Also, the increase of carbon nanofibers increased the output voltage caused by piezoelectric by 330%. The results indicated that by adding 1% wt of carbon nanofibers to the nanocomposite, the electrical conductivity was improved by 119 %, and the tensile strength and Young's modulus were increased by 94% and 117 %, respectively.. The apatite formation test shows that the addition of nanohydroxyapatite improves the bioactive properties of the surface and increases the apatite formed on the surface.
  9. Keywords:
  10. Piezoelectric ; Polyvinylidene Fluoride (PVDF) ; Carbon Nanofiber ; Nanocomposite ; Nanohydroxyapatite Coathing ; Biocompatible Polymer ; Bioactivity ; Polyether Ether Ketone

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