醇辅助还原法可控制备Cu@Ag核壳颗粒及其抗氧化性能  

Fabrication and anti-oxidation abilities of Cu@Ag core-shell nanoparticles by polyol-assisted method

作　　者：才滨[1] 张哲娟[1] 孙卓[1] 

机构地区：[1]华东师范大学物理与材料科学学院,纳光电集成与先进装备教育部工程研究中心,上海200062

出　　处：《复合材料学报》2017年第6期1278-1284,共7页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金青年基金(11204082);上海市自然基金(16ZR1410700);上海市闵行区企校合作项目(2015MH218);华东师范大学研究生科研创新实践项目(YJSKC2015-32)

摘　　要：研究了一种Ag包裹量可控制备Cu@Ag核壳颗粒的方法,其中利用乙二醇(EG)作为还原剂,AgNO3作为Ag源。探讨了不同分散剂,明胶、十六烷基三甲基溴化铵(CTAB)、聚乙烯吡咯烷酮(PVP)对Cu@Ag核壳颗粒形貌的影响,其中明胶作为分散剂时的包覆效果最佳。以明胶作为分散剂,当AgNO3浓度为0.93mol/L时,制得了包裹均匀的Cu@Ag核壳颗粒,其压实薄膜电阻仅为1.6Ω/sq,具有良好的导电性。通过表面Ag的包裹,Cu@Ag核壳颗粒在空气中放置4个月后,压实薄膜电阻为12.6Ω/sq,表现出持久的抗氧化性能。醇还原法可以实现在Cu颗粒表面快捷可控地制备Ag包裹层,包覆率高,且Cu@Ag复合颗粒抗氧化性能持久,适用于工业生产。A simple method was introduced to prepare Cu@Ag core-shell particles at room temperatureby using ethylene glycol （EG） as the reducing agent and AgNOa as the source of Ag atom. The effects of types of dispersing agent including gelatin, cetyltrimethylammonium bromide （CTAB） and polyvinylpyrrolidone （PVP）on the morphology of Cu@Ag core-shell particles were studied. The results show that gelatin is the best choice as dispersing agent. When the concentration of AgNOa is 0.93mol/L, the copper particles are completely covered with Ag nanoparticles on the surface with gelatin as dispersing agent. Because of the protection of Ag nanoparticles on the surface of Cu particles, the sheet resistance of compacted film based on Cu@Ag core-shell nanoparticles is as low as 1.6Ω/sq. After being exposed in air for 4 months, the sheet resistance of the Cu@Ag core-shell particles is a little hit higher as 12.6Ω/sq, which shows an enduring oxidation resistance of Cu@Ag core-shell particles. The silver can be effi- ciently achieved over the Cu particles under control and shows better anti-oxidation abilities than Cu particles with enduring oxidation resistance. This is a remarkable improvement for the electrical conductivity of Cu particles, which lays the foundations for the application of Cu@Ag core-shell particles in industrial production.

关 键 词：Cu@Ag 核壳颗粒 分散剂 抗氧化 导电性能 乙二醇 

分 类 号：TB332[一般工业技术—材料科学与工程] TM241[电气工程—电工理论与新技术]