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微乳液法制备纳米羟基磷灰石的机理
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):0-264.
作者姓名:任卫  李世普  王友法
作者单位:1. 钢铁研究总院
2. 武汉理工大学
基金项目:国家重点基础研究发展计划(973计划)
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(H2PO4)2·H2O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(H2PO4)2·H2O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  纳米颗粒  微乳液法制备  纳米羟基磷灰石  反应机理  microemulsions  inverse  hydroxyapatite  nanoparticles  mechanism  影响  超细颗粒  研究  可见光吸收光谱  形成过程  原理分析  参数  计算  线性关系  含水量  直径  胶束  激光散射
文章编号:1005-3093(2004)03-0257-08
收稿时间:2004-07-19
修稿时间:2003年3月20日

Synthetic mechanism of hydroxyapatite nanoparticles via AOT inverse microemulsions
REN Wei LI Shipu WANG Youfa.Synthetic mechanism of hydroxyapatite nanoparticles via AOT inverse microemulsions[J].Chinese Journal of Materials Research,2004,18(3):0-264.
Authors:REN Wei LI Shipu WANG Youfa
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.
Keywords:inorganic non-metallic materials  hydroxyapatite(HAP)  microemulsion  nanoparti-cles  
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