不同分散剂对纳米铁粉分散性能的影响  

Effect of Different Dispersants on Dispersion Capability of Nano-sized Iron Powders

作　　者：王超[1] 张振忠[1] 江成军[1] 曹娟[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》2007年第5期614-617,共4页Foundry Technology

基　　金：国家自然科学基金(10502025);省高校自然基金(05KJB1300421)资助.

摘　　要：通过对直流氢电弧蒸发法制备的纳米铁粉Zeta电位的测量,选用非离子型和阴离子型2类分散剂,分别研究了油酸、聚乙烯吡略烷酮(PVP)和十二烷基苯磺酸钠(SDBS)3种分散剂对纳米铁粉分散性能的影响。结果表明:超声时间、分散剂加入量及pH值时分散效果影响显著,随着超声时间和表面活性剂加入浓度的提高,粉体分散效果呈先增大后减小的趋势;PVP和油酸时纳米铁粉的分散效果较好,分散剂分散效果从高到低顺序依次为:PVP>油酸>SDBS;推荐最佳分散工艺:无水乙醇作为溶刑,超声功率560 W,超声时间15 min,pH等于10,PVP加入量4％。Nonionic and anionic dispersants were chosen on the basis of zeta value measurement of nano-sized iron powders prepared by high-vacuum DC Arc Plasma evaporation, The effect of oleic acid, polyvinylpirrolidone （PVP） and sodium dodecyl benzene sulfonate （SDBS） on dispersion capability of nano-sized iron powders was systematically studied. The results show that： the ultrasonic time, concentration of dispersant and pH has significant effect on dispersion property, with increase of ultrasonic time and surfactant concentration, the effect of dispersion firstly increases, then decreases; PVP and oleic acid have better effect on dispersing property of nano-sized iron powders, the dispersion effect is in the degrading order. PVP〉oleic acid〉SDBS, the optimal parameters are pH = 10, ultrasonic powder is 560 W, ultrasonic time is 15 rain and the concentration of PVP is 4 wt% when absolute ethanol is used as solvents.

关 键 词：纳米铁粉 分散剂 分散性能 

分 类 号：TB383.1[一般工业技术—材料科学与工程]