纳米SiO_2水中分散性能的影响因素研究  

Influences on Dispersion of SiO_2 Nano-powder in Aqueous System

作　　者：刘吉延[1] 孙晓峰[1,2] 邱骥[1] 李新[1] 

机构地区：[1]装甲兵工程学院装备再制造工程系,北京100072 [2]再制造技术国防科技重点实验室,北京100072

出　　处：《硅酸盐通报》2010年第6期1447-1450,共4页Bulletin of the Chinese Ceramic Society

基　　金：再制造技术国防科技重点实验室基金资助(9140C8504030810)

摘　　要：采用十二烷基苯磺酸钠(SDBS)作为分散剂,通过超声波作用对纳米SiO2粉体进行水中分散,并采用分散体系粒径分析和测定Zeta电位及透光率的方法,研究了SDBS含量、超声分散时间等因素对分散性能的影响。结果表明,纳米SiO2的粒径随分散剂含量、超声时间的增加,表现出先减小后缓慢增大的变化趋势。在适量SDBS的条件下,纳米SiO2分散体系因静电和空间位阻的作用而表现出良好的分散稳定性。SDBS对纳米SiO2粉体的较佳分散工艺为:SDBS含量为1.6%,超声处理时间为18min。Sodium dodecylbenzenesulfonate（SDBS） was used as the dispersant for the dispersion of SiO2 nano-powder in water through ultrasonic treatment.Influence of SDBS content and ultrasonic treatment time on the suspension stability was investigated by particle size distrubition analysis of SiO2 and the determination of Zeta potential and transmittance of the suspension.Results show that with increasing SDBS content,the particle size of SiO2 decreases remarkably and then increases obviously,which is similar to the case of increasing the ultrasonic treatment time.With optimum SDBS content,the suspension of SiO2 nano-powder possesses a good dispersing stability because of the existence of electrostatic and steric effects.The optimum dispersing condition is SDBS of 1.6wt% with the ultrasonic time of 18 min.

关 键 词：纳米SIO2 分散剂 稳定性 粒径 

分 类 号：TB34[一般工业技术—材料科学与工程]