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Surface Hydrophilic Modification For Carbon/Carbon Composites And Its Effect On The Bonding Strength Of Hydroxyapatite Coating

Author

Listed:
  • LEILEI ZHANG

    (State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China)

  • HEJUN LI

    (State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China)

  • QIANG SONG

    (State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China)

  • KEZHI LI

    (State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China)

  • JINHUA LU

    (State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China)

  • WEI LI

    (State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China)

  • SERGEY V. MIKHALOVSKY

    (School of Pharmacy and Biomolecular Sciences, University of Brighton, Lewes Road, Brighton BN2 4GJ, United Kingdom)

  • SHENG CAO

    (State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China)

Abstract

In order to improve the bonding strength of hydroxyapatite coating on carbon/carbon composites, a surface hydrophilic modification was performed on carbon/carbon composites using a combination ofH2O2andFeSO4⋅ 7H2Ounder ultraviolet irradiation. The hydroxyapatite coating was prepared by an ultrasound-assisted electrochemical deposition method. The results showed that the surface hydrophilic modification introduced a large number of oxygen-containing functional groups (C=O,C–OandCOOHgroup) onto the surface of carbon/carbon composites. The surface hydrophily of the modified carbon/carbon composites was significantly improved with the water contact angle decreasing from 85.7 ± 4.1° to 11.9 ± 1.5°. The modified carbon/carbon composites had strong induction ability for the deposition of hydroxyapatite crystals. The hydroxyapatite showed a wavy-shaped crystal at initial deposition process and subsequently formed a compact and uniform coating. The bonding strength of hydroxyapatite coating on modified carbon/carbon composites (9.58 ± 0.40 MPa) was significantly higher than that of the coating on unmodified carbon/carbon composites (3.04 ± 0.20 MPa).

Suggested Citation

  • Leilei Zhang & Hejun Li & Qiang Song & Kezhi Li & Jinhua Lu & Wei Li & Sergey V. Mikhalovsky & Sheng Cao, 2014. "Surface Hydrophilic Modification For Carbon/Carbon Composites And Its Effect On The Bonding Strength Of Hydroxyapatite Coating," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 21(01), pages 1-9.
    • Handle: RePEc:wsi:srlxxx:v:21:y:2014:i:01:n:s0218625x14500164
    DOI: 10.1142/S0218625X14500164
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