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材料研究学报  2004, Vol. 18 Issue (3): 257-264    
  论文 本期目录 | 过刊浏览 |
微乳液法制备纳米羟基磷灰石的机理
任卫;李世普;王友法
钢铁研究总院
Synthetic mechanism of hydroxyapatite nanoparticles via AOT inverse microemulsions
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钢铁研究总院
引用本文:

任卫; 李世普; 王友法 . 微乳液法制备纳米羟基磷灰石的机理[J]. 材料研究学报, 2004, 18(3): 257-264.

全文: PDF(1976 KB)  
摘要: 采用二已基琥珀酰磺酸钠(aerosol OT, AOT)作为表面活性剂, 正辛醇作为助表面活性剂, 异辛烷为油相, 将Ca(H$_{2}$PO$_{4}$)$_{2}$ $\cdot$ H$_{2}$O水溶液和 Ca(OH)$_{2}$饱和溶液作为水相制成反相微乳液, 并使两种微乳液反应, 制备出呈单分散的球形纳米羟基磷灰石颗粒. 通过系统性试验绘制了AOT/异辛烷/Ca(H$_{2}$PO$_{4}$)$_{2}$ $\cdot$ H$_{2}$O 水溶液和AOT/异辛烷/Ca(OH)$_{2}$饱和溶液微乳液的局部三元拟相图, 确定了该体系的反相微乳液单相区. 采用动态激光散射原理分析了上述微乳液的胶束直径, 确定了胶束直径与体系含水量的线性关系, 并计算了微乳液胶束的有关参数. 分析了羟基磷灰石的反应机理和颗粒的形成过程, 并采用紫外可见光吸收光谱, 研究了体系含水量对羟基磷灰石超细颗粒形成过程的影响.
关键词 无机非金属材料羟基磷灰石微乳液纳米颗    
Abstract:The microemulsion solution is composed of isooctane as oil phase, sodium bis(2--ethylhexyl) sulfosuccinate (AOT) as surfactant, 1--octanol as cosurfactant, Ca(H$_{2}$PO$_{4}$)$_{2}\cdot$H$_{2}$O solution and Ca(OH)$_{2}$ saturated solution as water phase. Hydroxyapatite nanoparticles were successfully processed by mixing the both microemulsions. The partial ternary phase diagram of microemulsions was set by a series of demarcation points between optically transparent and opaque, which indicated the single phase area of the composition and the effect of reactant ions. The diameters of inverse micellars measured by dynamic light scattering (DLS) depended linearly on water content $w$ ($w$=[H$_{2}$O]/[AOT]) in case that micellars was near spherical morphology. The parameters of micellars were computed on the reactant concentration, AOT concentration and average diameter of micellars. Mechanism of reaction and particles growth showed that the reactant concentration and water content played an important role for the result particle size.
Key wordsinorganic non-metallic materials    hydroxyapatite(HAP)    microemulsion    nanoparticles
收稿日期: 2004-07-19     
ZTFLH:  TG321  
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