CTAB/SDBS水基囊泡相磁流体制备及稳定性研究  

Preparation and stability of CTAB/SDBS water-based vesicular phase magnetic fluid

作　　者：左春玲[1] 邓庆芳 宋伟明[1] ZUO Chun-ing;DENG Qing-fang;SONG Wei-ming(College of Chemistry and Chemistry Engineering of Qiqihar University,Qiqihar 161006,China)

机构地区：[1]齐齐哈尔大学化学与化学工程学院,黑龙江齐齐哈尔161000

出　　处：《化学研究与应用》2024年第6期1400-1405,共6页Chemical Research and Application

基　　金：黑龙江省自然科学基金(YQ2019B010)资助。

摘　　要：以阳离子表面活性剂十六烷基三甲基溴化胺(CTAB)和阴离子表面活性剂十二烷基苯磺酸钠(SDBS)为原料复配自发形成囊泡相,并以其为微反应器,Fe^(2+)和Fe^(3+)在囊泡内发生反应,得到平均粒径为20m的Fe_(3)O_(4)纳米晶囊泡分散液作为水基磁流体。采用广角X射线衍射(XRD)、X射线光电子能谱(XPS)、透射电镜(TEM)、扫描电镜(SEM)、磁滞回线(VSM)等对合成的Fe_(3)O_(4)纳米晶以及磁流体进行分析表征。结果表明,以合适的阴阳离子表面活性剂获得的囊泡相为微反应器形成的水基囊泡相磁流体,在室温稳定性优良,静置60h其稳定性系数仍然可达97%。在磁场反复作用后,囊泡相水基磁流体仍具有良好的稳定性,其中的Fe_(3)O_(4)纳米粒子颗粒均匀,具有超顺磁性特征,磁饱和度达到59emu/g。The vesicle phase was formed spontaneously from the mixture of cationic surfactant cetyltrimethylammonium bromide(CTAB)and anionic surfactant sodium dodecylbenzene sulfonate(SDBS).The vesicle as a microreactor in which Fe^(2+) and Fe^(3+)re-acted and the Fe_(3)O_(4) nanocrystalline with an average particle size of 20 nm was obtained as a water-based magnetic fluid.The vesicle and magnetic fluid were characterized and analyzed by X-Ray diffraction(XRD),X-Ray photoelectron spectroscopy(XPS),trans-mission electron microscopy(TEM),scanning electron microscopy(SEM)and vibrating sample magnetometer(VSM).The results showed that the water-based magnetic fluid formed in the microreactor was stable at room temperature,and its stability coefficient could still reach 97%after 60 h.After repeated application of magnetic field,the water-based magnetic fluid in the vesicle phase still shows good stability,and the Fe_(3)O_(4) nanoparticles are homogeneous and super paramagnetic,and the magnetic saturation reach 59 emu/g.

关 键 词：CTAB/SDBS 囊泡 微反应器 磁流体 FeO4磁纳米粒子 稳定性 

分 类 号：O614.8[理学—无机化学]