| 摘要: |
| 为寻找适合于热解碳表面电泳沉积羟基磷灰石涂层的分散介质，借助于SEM、XRD和自动生化分析仪研究了不同非水分散介质对电泳沉积涂层的影响。结果表明，分散介质的种类对电泳沉积层的强度及附着能力有很大的影响，采用乙二醇作为分散介质可以显著地提高电泳沉积层的强度和附着能力。分散介质的粘度影响电泳沉积速度，采用粘度较高的乙二醇作为分散介质时，提高温度可显著提高电泳沉积速度。羟基磷灰石在乙二醇中的溶解度显著高于在乙醇和正丁醇中的溶解度，羟基磷灰石在分散介质中的溶解度越高，越容易导致电泳沉积层中羟基磷灰石颗粒的团聚，当烧结温度高于1 000 ℃时，沉积层中颗粒的团聚对涂层烧结性能没有明显影响。电泳沉积分散介质不会影响羟基磷灰石粉末的晶体结构。 |
| 关键词: 热解碳 羟基磷灰石 电泳沉积 分散介质 涂层 |
| DOI： |
| 分类号: |
| 基金项目:湖北省自然科学基金（2004ABA113） |
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| The Effect of Dispersion Media on Electrophoretic Coating of Hydroxyapatite on Pyrolytic Carbon |
|
GAO Lin
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College of Chemistry and Environmental Engineering, Yangtze University
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| Abstract: |
| The effect of different nonaqueous dispersion media on hydroxyapatite coating has been studied by means of SEM，XRD and chemistry analyzer in order to find suitable medium for coating hydroxyapatite on pyrolytic carbon via electrophoretic deposition (EPD). The results show that the strength of green coating and the adhesive strength between the coating and the carbon substrate can be enhanced significantly if glycol is used as dispersion medium. The viscosity of dispersion medium affects the electrophoretic velocity which can be enhanced with temperature rising if glycol(with higher viscosity) used as dispersion medium. The solubility of hydroxyapatite in glycol is higher than that in ethanol and n?butanol. The higher the solubility of hydroxyapatite in dispersion medium, the more distinct the particles agglomeration occurring in green coatings, and no evident proof indicates that the agglomeration influence the sinterability of the green coatings if the sintering temperature is above 1 000 ℃. Dispersion medium does not affect the crystal structure of hydroxyapatite. |
| Key words: pyrolytic carbon hydroxyapatite electrophoretic deposition dispersion medium coatings |
