Surface hydrophilic modification for carbon/carbon composites and its effect on the bonding strength of hydroxyapatite coating

Zhang Leilei, Li Hejun, Song Qiang, Li Kezhi, Lu Jinhua, Li Wei, Sergey V. Mikhalovsky, Cao Sheng

Research output: Contribution to journalArticle

1 Citation (Scopus)

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 of H2O2 and FeSO4 · 7H2O under 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-O and COOH group) 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).

Original languageEnglish
Article number1450016
JournalSurface Review and Letters
Volume21
Issue number1
DOIs
Publication statusPublished - Feb 2014
Externally publishedYes

Fingerprint

carbon-carbon composites
Carbon carbon composites
Durapatite
Hydroxyapatite
Surface treatment
coatings
Coatings
Crystals
Functional groups
Contact angle
crystals
induction
Ultrasonics
Irradiation
Oxygen
irradiation
Water
oxygen

Keywords

  • bonding strength
  • Carbon/carbon composites
  • coating
  • hydroxyapatite
  • surface modification

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Condensed Matter Physics
  • Materials Chemistry
  • Surfaces, Coatings and Films

Cite this

Surface hydrophilic modification for carbon/carbon composites and its effect on the bonding strength of hydroxyapatite coating. / Leilei, Zhang; Hejun, Li; Qiang, Song; Kezhi, Li; Jinhua, Lu; Wei, Li; Mikhalovsky, Sergey V.; Sheng, Cao.

In: Surface Review and Letters, Vol. 21, No. 1, 1450016, 02.2014.

Research output: Contribution to journalArticle

Leilei, Zhang ; Hejun, Li ; Qiang, Song ; Kezhi, Li ; Jinhua, Lu ; Wei, Li ; Mikhalovsky, Sergey V. ; Sheng, Cao. / Surface hydrophilic modification for carbon/carbon composites and its effect on the bonding strength of hydroxyapatite coating. In: Surface Review and Letters. 2014 ; Vol. 21, No. 1.
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