不同分散剂对纳米铋粉在无水乙醇中分散性能影响  

Effect of Different Surfactants on the Dispersion Properties of Bismuth Nanoparticles in the Alcohol Solvent

作　　者：杨江海[1] 张振忠[1] 赵芳霞[1] 曹娟[1] 江成军[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《铸造技术》2008年第12期1708-1711,共4页Foundry Technology

基　　金：国家自然科学基金(10502025);省高校自然基金(05KJB1300421);江苏省火炬计划(H2007306)

摘　　要：在用直流电弧等离子体法制备纳米铋粉的基础上,通过研究pH值对纳米铋粉分散性能影响,选用不同分散剂,研究了不同超声时间和不同分散剂加入量条件下,聚乙烯吡咯烷酮(PVP)、聚乙二醇4 000(PEG)、油酸(OA)三种分散剂对纳米铋粉在无水乙醇中分散性能的影响。结果表明,加入聚乙烯吡咯烷酮及聚乙二醇分散剂的分散效果随着超声时间和表面活性剂加入量的增加呈现先增大后减小的趋势,而加入油酸的溶液分散性出现了波动;聚乙烯吡咯烷酮和聚乙二醇对纳米铋粉的分散性较好;不同分散剂分散效果从高到低顺序依次为:聚乙烯吡咯烷酮>聚乙二醇>油酸。最佳分散工艺为:聚乙烯吡咯烷酮加入量5%,超声功率560 W,超声时间50 min。On the basis of measuring dispersion properties of bismuth nanoparticles which was prepared by DC Arc plasma evaporation in different pH value alcohol solvent, three different dispersants were selected in this investigation. The influences of supersonic dispersing time and surfactant concentration on the dispersion properties of the bismuth nanoparticles in the alcohol solvent were systematically studied, in which PVP, Oleic acid, Poly ethylene glycol were employed as surfactants. The results show that, with the increase in ultrasonic dispersing time and the concentration of PVP and Poly ethylene glycol, the dispersion property of the suspension increases, and then decreases. However, the addition of oleic acid results in a fluctuation of dispersion property. The effect of three surfactants on the dispersion property of the suspension has a descending order as follows. PVP〉Poly ethylene glycolS〉 Oleic acid. The optimum dispersion parameters are that the addition of PVP, ultrasonic power and ultrasonic dispersing time are 5 wt%, 560 w and 50 min respectively.

关 键 词：纳米铋粉 直流电弧蒸发 分散 表面活性剂 

分 类 号：TB383.1[一般工业技术—材料科学与工程]