无机材料学报

• 研究论文 • 上一篇    下一篇

等离子体喷涂氧化钛涂层的生物活性研究

赵晓兵1,2,3, 刘宣勇3, 陈志刚1, 丁传贤3   

  1. 江苏工业学院1. 材料科学与工程系; 2. 常州市高分子新材料重点实验室, 常州 213164; 3. 中国科学院上海硅酸盐研究所, 上海 200050
  • 收稿日期:2007-10-30 修回日期:2007-12-27 出版日期:2008-09-20 网络出版日期:2008-09-20

Study on Bioactivity of Plasmasprayed Titania Coating

ZHAO Xiao-Bing1,2,3, LIU Xuan-Yong3, CHEN Zhi-Gang1, DING Chuan-Xian3   

  1. 1. Department of Materials Science and Technology, Jiangsu Polytechnic University, Changzhou 213164, China; 2. Key Laboratory for Polymer Materials, Changzhou 213164, China; 3. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2007-10-30 Revised:2007-12-27 Published:2008-09-20 Online:2008-09-20

摘要: 以纳米TiO2粉末为喷涂原料, 采用大气等离子体喷涂技术在医用钛合金上制备氧化钛涂层. 利用酸和碱溶液对氧化钛涂层表面进行生物活化处理, 体外模拟体液浸泡实验考察涂层的生物活性. 采用XRD、SEM、FTIR、EDS等测试技术对改性前后氧化钛涂层的生物活性进行表征. 结果表明: 氧化钛涂层和钛合金基体的结合强度较高, 其值高达40MPa, 涂层的耐模拟体液腐蚀性优于钛合金. 酸和碱溶液表面改性后的氧化钛涂层经模拟体液浸泡可在其表面生成含有碳酸根的羟基磷灰石(类骨磷灰石), 显示良好的生物活性.

关键词: 等离子体喷涂, 氧化钛涂层, 化学处理, 生物活化

Abstract: Titania coatings were deposited on titanium alloy substrates by atmospheric plasma spraying using nano TiO2 powder as feedstock. Acid and alkali solutions were implied to modify the surface of the as-sprayed titania coatings. The bioactivity of titania coatings before and after modification were investigated by simulated body fluid (SBF) tests in vitro. X-ray diffraction, Scanning electron microscope, Fourier transform infrared spectroscope and Energy diffraction spectroscope
were used to investigate the microstructure and composition of titania coatings. The bonding strength and anticorrosion of titania coatings were also studied. The results indicate that the bonding strength between titania coating and Ti alloy substrate is 40MPa. The corrosion resistance performance of titania coating in SBF is better than that of Ti-6Al-4V alloy.
The SBF tests show that the carbonate-containing hydroxyapatite is formed on the titania coating surfaces which is treated by H2SO4 and NaOH. However, no bonelike apatite is formed on the surface of as-sprayed titania coating. It is concluded that the bioactivity of titania coating is improved greatly by chemical treatment.

Key words: plasma spray, titania coating, chemical treatment, bioactivation

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