期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
生物活性羟基磷灰石/二元氨基酸共聚物复合材料的制备和性能 被引量:5
1
作者 蒋佳春 吕国玉 +2 位作者 严永刚 伍登学 刘少英 《材料工程》 EI CAS CSCD 北大核心 2013年第4期56-62,共7页
通过原位聚合法制备新型生物活性羟基磷灰石/二元氨基酸共聚物(BHA/PAA)复合材料。采用1 H核磁共振(1 H NMR)、红外光谱(IR)、X-ray衍射光谱(XRD)、X射线光电子能谱(XPS)、扫描电镜(SEM)和差示扫描量热分析(DSC)对其组成结构、热性能、... 通过原位聚合法制备新型生物活性羟基磷灰石/二元氨基酸共聚物(BHA/PAA)复合材料。采用1 H核磁共振(1 H NMR)、红外光谱(IR)、X-ray衍射光谱(XRD)、X射线光电子能谱(XPS)、扫描电镜(SEM)和差示扫描量热分析(DSC)对其组成结构、热性能、力学性能和体外降解性能进行研究。结果表明:BHA颗粒均匀分散在PAA基质中,形成的复合材料具有良好的均一性;复合材料的无机相和有机相之间存在着一定的化学键相互作用;由于BHA的引入,复合材料的结晶速率加快,整体结晶度下降;复合材料具有良好的力学性能,其抗压强度随着BHA含量的增加而明显提高,抗弯强度略有减小,当BHA含量为30%(质量分数)时,复合材料的抗压强度和抗弯强度分别为141.02MPa和86.32MPa,力学性能与人体皮质骨相匹配;体外降解实验结果表明,随着BHA含量的增加,材料的降解速率加快,且在降解过程中保持良好的力学性能稳定性,在骨修复方面具有潜在的应用。 展开更多
关键词 二元氨基酸共聚物 生物活性羟基磷灰石 复合材料 力学性能 降解
下载PDF
Effect of trace HA on microstructure, mechanical properties and corrosion behavior of Mg-2Zn-0.5Sr alloy 被引量:8
2
作者 Jian-Xing Li Yuan Zhang +1 位作者 Jing-Yuan Li Jian-Xin Xie 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2018年第2期299-310,共12页
Effect of the addition of trace HA particles into Mg-2Zn-0.5Sr on microstructure, mechanical properties, and bio-corrosion behavior was investigated in comparison with pure Mg. Microstructures of the Mg-2Zn-0.5Sr-xHA ... Effect of the addition of trace HA particles into Mg-2Zn-0.5Sr on microstructure, mechanical properties, and bio-corrosion behavior was investigated in comparison with pure Mg. Microstructures of the Mg-2Zn-0.5Sr-xHA composites (x= 0, 0.1 and 0.3 wt%) were characterized by optical microscopy (OM), scanning electron microscopy (SEM) equipped with energy dispersion spectroscopy (EDS) and X-ray diffraction (XRD). Results of tensile tests at room temperature show that yield strength (YS) of Mg- 2Zn-0.5Sr/HA composites increases significantly, but the ultimate tensile strength (UTS) and elongation decrease with the addition of HA particles from 0 up to 0.3 wt%. Bio-corrosion behavior was investigated by immersion tests and electrochemical tests. Electrochemical tests show that corrosion potential (Ecorr) of Mg-2Zn-0.5Sr/HA composites significantly shifts toward nobler direction from -1724 to -1660 mVscE and the corrosion current density decreases from 479.8 to 280.8 p.Acm^-2 with the addition of HA particles. Immersion tests show that average corrosion rate of Mg-2Zn-0.BSr/HA composites decreases from 11.7 to 9.1 mm/year with the addition of HA particles from 0 wt% up to 0.3 wt%. Both microstructure and mechanical properties can be attributed to grain refinement and mechanical bonding of HA particles with second phases and α-Mg matrix. Bio-corrosion behavior can be attributed to grain refinement and the formation of a stable and dense CaHPO4 protective film due to the adsorption of Ca^2+ on HA particles. Our analysis shows that the Mg-2Zn-0.5Sr/0.3HA with good strength and corrosion resistance can be a good material candidate for biomedical applications. 展开更多
关键词 Magnesium alloys bio-composites hydroxyapatite Microstructure Mechanical property bio-corrosion behavior
原文传递
生物活性羟基磷灰石牙膏的研制 被引量:4
3
作者 王菊如 张超武 +1 位作者 李华 王荣江 《齐齐哈尔轻工业学院学报》 1996年第2期26-28,共3页
本文论述了羟基磷灰石及由其所得的生物活性牙膏的制备方法,并对这种牙膏防治牙病和保健牙齿的机理进行了全面探讨。结果表明:生物活性羟基磷灰石牙膏具有任何药物牙膏所无法比拟的独特功效和作用,应用前景广阔。
关键词 生物活性 羟基磷灰石 牙膏 防治 牙病 研制
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部