核壳型银/聚苯胺纳米复合材料的导电性能  

Conductivity of Silver/Polyaniline Core-Shell Nanocomposite

作　　者：李芝华[1,2] 华斯嘉[1,2] 卢健体[1,2] 

机构地区：[1]中南大学材料科学与工程学院 [2]有色金属材料科学与工程教育部重点实验室,湖南长沙410083

出　　处：《高分子材料科学与工程》2013年第11期46-49,共4页Polymer Materials Science & Engineering

摘　　要：在十二烷基硫酸钠(SDS)微乳液中制备出银纳米溶胶,并在此基础上采用原位聚合法制备银/聚苯胺纳米复合材料。采用扫描电镜和透射电镜、X射线衍射分析仪、傅里叶变换红外光谱仪、紫外-可见光谱仪分别对复合粒子的形貌、晶体结构和官能团进行了检测。结果表明,制备的材料是以银纳米粒子在内而聚苯胺在外的核壳型的纳米复合材料。银纳米粒子粒径大小在100nm以内,并且随SDS用量增加逐渐变小,银纳米粒子在聚苯胺中的分散性得以提高,复合粒子形貌逐渐呈球状,核壳结构得到有效改善。导电性能测试结果显示,当SDS浓度为15mmol/L时,复合材料电导率可达到27.36 S/cm。Silver-polyaniline nanocomposite was prepared by in-situ polymerization from silver sol by using sodium dodecyl sulfate （SDS） as surfactant. Scanning electron microscopy and transmission electron microscopy, X-ray diffraction analyzer, Fourier transform infrared spectrometer and UV-Vis spectroscopy analysis were used to characterize and analyze the morphology, crystal structure and functional groups. The prepared material is a core-shell structure nanocomposite, of which the inside is nano-silver particles of less than 100nm and the outside is polyaniline. With the SDS dosage increasing, the nano-silver particle size becomes smaller, the dispersion of silver particles becomes better, composite particles can gradually render the ball shape, thus the coating of the core-shell structure is effectively improved. Conducting performance results show that when the SDS concentration is 15mmol/L, the conductivity of composite materials reaches 27.36 S/cm.

关 键 词：聚苯胺 银纳米粒子 核-壳结构 微乳液 

分 类 号：TB383[一般工业技术—材料科学与工程]