Acta Chimica Sinica ›› 2012, Vol. 70 ›› Issue (03): 235-240.DOI: 10.6023/A1107063 Previous Articles     Next Articles

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钛基多孔HA/SiO2 复合涂层的制备及性能研究

黄紫洋, 张岚, 梁广超   

  1. 福建师范大学化学与材料学院 福州 350007
  • 投稿日期:2011-07-06 修回日期:2011-08-22 发布日期:2011-09-26
  • 通讯作者: 黄紫洋
  • 基金资助:

    国家自然科学基金(No. 30970887)资助项目.

Study on Fabrication and Properties of Porous HA/SiO2 Composite Coating on Titanium Substrate

Huang Ziyang, Zhang Lan, Liang Guangchao   

  1. College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007
  • Received:2011-07-06 Revised:2011-08-22 Published:2011-09-26
  • Supported by:

    Project supported by the National Natural Science Foundation of China (No. 30970887).

In order to obtain porous hydroxyapatite (HA) coating with high bonding strength to substrate, hydroxyapatite/silica/chitosan (HA/SiO2/CS) composite coatings were prepared on titanium substrate by electrophoretic deposition (EPD) in n-butylalcohol as dispersion medium and SiO2 powder as additive. And then a porous HA/SiO2 composite coating was obtained by sequentially sintering treatment. The surface morphology, chemical composition, phase composition and the bonding strength between composite coating and substrate were characterized by scanning electron microscopy (SEM), fourier transform infrared spectrometer (FT-IR), X-ray diffraction (XRD) and shear strength testing experiment, respectively. The bioactivity of the porous HA/SiO2 composite coating was evaluated by immersion in simulated body fluid (SBF). The results showed that the porous HA/SiO2 composite coating with uniform cavities was obtained by sintering at 700 ℃ from the HA/SiO2/CS composite coating fabricated by EPD in suspension with 1:1:1 mass ratio of HA/SiO2/CS. The large-pore diameter was about 10~15 μm, the small-pore diameter was about 1~5 μm, and the bonding strength between composite coating and substrate was up to 25.5 MPa. The coating surface was covered totally by carbonate-apatite after immersion in SBF for 7 d. This porous HA/SiO2 composite coating exhibits a good bioactivity and high bonding strength between composite coating and substrate.

Key words: hydroxyapatite, electrophoretic deposition, HA/SiO2 composite coating, porousity, bioactivity