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材料研究学报  2009, Vol. 23 Issue (2): 153-157    
  研究论文 本期目录 | 过刊浏览 |
热--自组装单分子膜表面改性镁生物材料的腐蚀降解
高家诚1; 乔丽英1;2;  王勇1
1.重庆大学材料科学与工程学院 重庆 400045
2.重庆大学国家镁合金材料工程技术研究中心 重庆400044
Corrosion degradation of surface modified bio–magnesium materials by heat–self–assembled monolayer
GAO Jiacheng1; QIAO Liying1;2;  WANG Yong1
1.College of Materials Science and Engineering; Chongqing University; Chongqing 400045
2.National Engineering Research Center for Magnesium Alloys; Chongqing University; Chongqing 400044
引用本文:

高家诚 乔丽英 王勇. 热--自组装单分子膜表面改性镁生物材料的腐蚀降解[J]. 材料研究学报, 2009, 23(2): 153-157.
, , . Corrosion degradation of surface modified bio–magnesium materials by heat–self–assembled monolayer[J]. Chin J Mater Res, 2009, 23(2): 153-157.

全文: PDF(1157 KB)  
摘要: 

将Mg和Mg--Ca合金进行热--自组装单分子膜表面改性, 并将其试样浸泡在SBF中和植入动物体内进行比较试验, 用LKII98B测试腐蚀电流密度, 用原子吸收光谱测定溶液中的镁离子浓度, 测量试样的质量和溶液pH值的变化, 用SEM、XRD, FTIR、EDS等分析其表面形貌、物相组成和成分变化, 研究了材料的腐蚀降解特性. 结果表明, 热自组装膜改善了镁基生物材料的腐蚀抗力和生物活性. 纯Mg的腐蚀速率由0.11 mm/y下降到0.05 mm/y, Mg--Ca合金的腐蚀速率由 0.38 mm/y下降到0.32 mm/y. 植入动物12周后, 直径的减小由0.97 mm下降到0.20 mm, 界面新类骨质层厚度由2.56 mm增加到3.14 mm.

关键词 材料失效与保护表面改性腐蚀降解热自组装膜    
Abstract

Mg and a Mg–Ca alloy were heat treated at 773 K for 10h and self–assembled in stearic acid alcohol solution of 0.5mol/L for 1.5 h to improve the corrosion properties and biocompatibility of bio–magnesium materials. And then comparison research was carried out for the bio–magnesium materials with and without modification by putting in simulated body fluid and in vivo animal test. Electronic balance, SEM, EDS, XRD FTIR, digital electronic pH meter and atomic absorption spectrometry were used to analyse the corrosion process, corrosion rate and the products. The results showed that the corrosion resistance and bioactivity of the bio–magnesium materials with heat–self–assembled monolayer were improved. The corrosion rate of Mg changed from 0.11 mm/y to 0.05 mm/y, and that of Mg–Ca alloy from 0.38 mm/y to 0.32 mm/y. The diameter of Mg in thigh bone of the tested rabbit for 12 weeks decreased from 0.97 mm to 0.20 mm, and thickness of new bone increased from 2.563 mm to 3.135 mm.

Key wordsmaterials failure and protection    magnesium    surface modification    corrosion degradation    heat–self–assembled monolayer
收稿日期: 2008-07-28     
ZTFLH: 

TG172

 
基金资助:

国家自然科学基金30670562资助项目.

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