不同醇对微乳液体系结构参数的影响及纳米BaF_2的制备  

Effect of different alcohols on structural parameters of microemulsion system and preparation of BaF_2 nanoparticles

作　　者：刘晓红[1] 田明明[1] 许春晓[1] 荀开昺[1] 

机构地区：[1]南昌大学环境与化学工程学院,江西南昌330031

出　　处：《日用化学工业》2013年第3期169-172,共4页China Surfactant Detergent & Cosmetics

摘　　要：采用稀释法测定了十六烷基三甲基溴化铵(CTAB)/醇/正庚烷/水四组分微乳液体系在不同醇时体系的结构参数。结果表明:随着醇碳原子数的增加,微乳液体系的结构参数水内核半径Rw、颗粒有效半径Re、界面层厚度l、平均聚集数珔n以及吉布斯自由能-ΔG0c→i增加,而颗粒总数Nd以及分散相所占的总界面面积Ad减小。采用CTAB/正丁醇/正庚烷/水微乳液体系制备了纳米BaF2。经SEM和XRD表征,BaF2为均匀的球形纳米粒子,粒径39 nm左右。Structural parameters of four component [ cetyltrimethylammonium bromide （CTAB）/alcohol/n- heptane/H20] mieroemulsion system composed with different alcohols were determined by dilution method. Results showed that as the carbon number of straight chain alcohol increases, the radius of inner water droplet Rw, the effective radius of particle Re, the length of interface l, the average aggregation number of surfactant n 0 and Gibbs free energy - △Ge→i gradually increases, while the total particle count Nd and the total interfacial area of dispersed phase Aa gradually decreases. BaF2 nanoparticles were prepared by using the microemulsion systems of CTAB/n- butano]/n- heptane/H20. The prepared BaF2 product was characterized by SEM and XRD, and the results showed that the product is uniform spherical nanoparticles with diameter of about 39 nm.

关 键 词：微乳液 结构参数 纳米BaF2 

分 类 号：O614.233[理学—无机化学] TB383.1[理学—化学]