生物活性玻璃超细粉体的硬脂酸表面修饰研究  

Surface Modification of the Superfine Bioactive Glass Powder by Using Stearic Acid

作　　者：郭常亮[1] 陈晓峰[1] 赵娜如[1] 谢林[1] 李玉莉[2] 

机构地区：[1]华南理工大学材料科学与工程学院生物材料研究所 [2]温州医学院生物医学工程中心,温州325027

出　　处：《硅酸盐通报》2008年第2期207-212,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(50672028,50702023)

摘　　要：为了扩展溶胶-凝胶生物活性玻璃在复合材料骨修复支架领域的应用,本研究使用硬脂酸对生物玻璃超细粉体进行了表面改性,并采用TG/DSC、XPS、FTIR和表面接触角测定等技术对改性前后的生物玻璃样品的结构和性能进行了一系列表征和分析。结果表明硬脂酸通过化学键形式结合在生物活性玻璃表面,修饰层质量百分数约为4.5%,修饰层厚度约为3-4nm;而且改性后的生物玻璃超细粉体疏水性显著提高,在有机溶剂及壳聚糖基相中的分散性有明显改善。To expand the application of sol-gel bioactive glasses （SBG） in composite bone repairing scaffold field, stearic acid were used to surface modification of the superfine bioactive glass powder and the properties of samples after modification were tested and analyzed in series using TG/DSC, XPS, FTIR, and water contact angle methods. It was showed that stearic acid covalently grafted on the surface of SBG; and the weight percentage of coating was about 4.5%; and thickness of the coating was about 3-4nm. The hydrophobility of the SBG after modification was significantly improved and the dispersibility in organic solvent and chitosan base-phase was noticeably enhanced.

关 键 词：溶胶-凝胶 生物活性玻璃 表面改性 硬脂酸 

分 类 号：TB321[一般工业技术—材料科学与工程]