不同工艺条件对球形纳米硫酸钙制备的影响  

Influence of different technology conditions on preparation of spherical nano calcium sulfate particle

作　　者：王力[1] 刘聪[1] 庄春艳[1] 孟德芹[1] 方杰[1] 

机构地区：[1]山东科技大学化学与环境工程学院,山东青岛266510

出　　处：《功能材料》2012年第6期740-743,共4页Journal of Functional Materials

基　　金：山东科技大学研究生创新基金资助项目(YCA100423)

摘　　要：制备纳米硫酸钙(CaSO4)颗粒的关键在于采用适宜的制备工艺条件配制反相微乳液,使CaSO4晶体在理想的环境中生长。采用AOT、OP-10复合表面活性剂/环己烷/正戊醇/水溶液反相微乳液反应体系,在水与表面活性剂的摩尔比(水表比)ω=20、反应物浓度n([Ca2+])/n([SO24-])=0.125mol/L、陈化时间t=10min的条件下,制备出了形貌均一,平均粒径为70nm的球形CaSO4颗粒。用扫描电子显微镜(SEM)对产物形貌和大小进行了表征。实验分析了水表比ω、反应物浓度n([Ca2+])/n([SO24-])值、陈化时间t等因素对纳米CaSO4颗粒粒径的影响。A key factor of preparing nano calcium sulfate is to employ a appropriate technology condition for forming reverse micelle microemulsion, which makes CaSO4 crystal grow with an ideal templating effect of reverse mieelle. Homogeneous spherical nano CaSO4 with an average diameter of 70nm were prepared by using reverse micelle microemulsion of AOT, OP-10 compound surfactants/cyclohexane/n-pentanol/water under mole ratio of water to surfactants 20, reactants Concentration n（[Ca^2＋ ]）/n（[SO4/2-]）=0. 125mol/L and aging time 10 min. The influence factors such as the molar ratio of water to surfactants （ω）, reactants concentration, n（[Ca^2＋]）/n（[SO4/2- ]） value, aging time t, etc. were also analyzed.

关 键 词：反相微乳液 纳米CaSO4 球形纳米颗粒 表面活性剂 

分 类 号：O614[理学—无机化学] TQ132.32[理学—化学]