去离子水中分散剂对复合纳米ZnO-CeO_2粉体的分散效果  

Effects of Two Kinds of Dispersants on Dispersion Behavior of ZnO-CeO_2 Composite Nano-Powder in Deionized Water

作　　者：杨培[1] 张金生[1] 李丽华[1] 黄新玉[1] 

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《材料保护》2014年第2期16-18,9,共3页Materials Protection

基　　金：辽宁省自然科学基金资助项目(20011521)

摘　　要：纳米颗粒在有机溶剂中能较好分散,但有机溶剂有毒,且成本高。以去离子水为介质,分别加入分散剂吐温-80、十二烷基苯磺酸钠(SDBS),对复合纳米ZnO-CeO2粉体进行分散。采用傅立叶变换红外光谱仪、X射线衍射仪和透射电镜对分散物进行分析,研究了不同分散条件下的分散效果。结果表明:50 mL去离子水、0.5 g复合纳米ZnO-CeO2粉体体系中,采用吐温-80分散,其用量为1.0 g,pH值为5,温度为60℃,超声时间为20 min时,分散效果最佳;采用SDBS分散,其用量为1.5 g,pH值为5,温度为50℃,超声时间为20 min时,分散效果最佳;复合纳米ZnO-CeO2粉体经2种分散剂分散后,表面被均匀包覆,且分散体系稳定,团聚现象明显降低,晶型无变化;非离子型分散剂吐温-80的分散效果优于阴离子型分散剂SDBS的。ZnO- CeO_2 composite nanopowder was dispersed in deionized water separately containing Tween-80 and sodium dodecyl benzene sulfonate(SDBS) as the dispersants.Resultant dispersions were analyzed by Fourier transform infrared spectrometry,X- ray diffraction and transmission electron microscopy.Results showed that,in 50 mL water containing 0.5 g ZnO-CeO_2 composite nano-powder,the best dispersion efficiency was obtained at Tween-80 dosage of 1.0 g,pH value of 5,temperature of 60℃,and ultrasonic irradiation time of 20 min.As to the same aqueous system,the best dispersion efficiency was acquired at SDBS dosage of 1.5 g,pH value of 5,temperature of 50℃,and ultrasonic irradiation time of 20 min.After dispersion with the two kinds of dispersants,the surface of the composite nano- powder was uniformly encapsulated to form stable dispersions whose agglomeration was significantly reduced,while the crystal form retained unchanged.Besides,non-ionic-type dispersant Tween-80 was advantageous over anioic dispersant SDBS in terms of the ability to disperse title composite nano-powder.

关 键 词：复合纳米ZnO-CeO2粉体 粉体分散 吐温-80 十二烷基苯磺酸钠(SDBS) 分散效果 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TB383.3