摘要：为了实现纳米颗粒的分级,研究影响纳米铜粉在无水乙醇中分散稳定性的因素。通过测定纳米铜粉分散在无水乙醇中形成的悬浮液的Zeta电位和吸光度,探讨悬浮液中分散剂的加入量和pH值对纳米Cu粉末在无水乙醇中的分散稳定性的影响。结果表明:当质量分数为0.01%的纳米铜粉分散在无水乙醇中,当分散剂加入量为0.008%(质量分数)时,分散稳定性最好。在此条件下,调节pH将降低其分散稳定性。

关键词：纳米Cu粉末；分散；Zeta电位；吸光度

Abstract： In order to achieve for the classification of Cu nano-particles， the effect factors of dispersion and stability of Cu nano-particles in ethanol were researched. The dispersion and stability of Cu nano-particles in ethanol were studied under different pH values and dispersant concentration by the method of Zeta potential and absorbency. The results showed that when the mass fraction of Cu nano-particles was 0.01％， and the mass fraction of SDBS was 0.008%， the dispersion and stability of Cu nano-particles-ethanol suspension was the best， Under these conditions， regulation of pH might reduced the dispersion stability. 

Keywords：Cu nano-particles； dispersion； Zeta potential； absorbance