Preparation of Conducting Polyaniline-Bismuth Nanoparticle Composites by Planetary Ball Milling
Preparation of Conducting Polyaniline-Bismuth Nanoparticle Composites by Planetary Ball Milling
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DOI：
10.1007/s11664-009-0786-3
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发表时间：
2009-07-01
影响因子：
2.1
通讯作者：
Toshima, N.
中科院分区：
文献类型：
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作者：
Anno, H.;Fukamoto, M.;Toshima, N.
采用行星式球磨技术制备了导电聚苯胺（PANi）/Bi纳米粒子复合材料。将PANi粉末和作为电荷载体掺杂剂的（+/-）-10-间甲苯磺酸（CSA）溶解在间甲酚中。将具有不同摩尔比R =苯胺/Bi（R = 0.1比1）值的溶液和Bi粉末（小于90 μ m）装入具有氧化锆球的氧化锆罐中，然后以600 rpm的转速研磨6小时至12小时。采用X射线衍射、透射电子显微镜、傅里叶变换红外光谱、紫外-可见（UV-Vis）透射光谱、热重分析和差热分析等方法对CSA掺杂的PANi/Bi纳米复合材料进行了表征。Bi纳米粒子的尺寸范围从几十纳米到几百纳米分散在CSA掺杂的聚苯胺矩阵。PANi还充当用于Bi颗粒免于聚集和可能的氧化的保护剂。通过将分散的溶液浇铸到石英基底上并干燥，获得了CSA掺杂的PANi/Bi纳米复合膜。在室温至400 K的温度范围内测量了薄膜的Seebeck系数和电导率。
Conducting polyaniline (PANi)/Bi nanoparticle composites have been prepared using a planetary ball-milling technique. PANi powder and (+/-)-10-camphorsulfonic acid (CSA) as a charge carrier dopant were dissolved in m-cresol. The solution and Bi powder (under 90 mu m) with different values of the molar ratio R = aniline/Bi, R = 0.1 to 1, were encased in a zirconia pot with zirconia balls, then milled at a rotating velocity of 600 rpm for 6 h to 12 h. X-ray diffraction, transmission electron microscopy, Fourier-transform infrared spectroscopy, ultraviolet-visible (UV-Vis) transmission spectroscopy, thermal gravimetric analysis, and differential thermal analysis were used to characterize the CSA-doped PANi/Bi nanoparticle composites. Bi nanoparticles ranging in size from several tens of nanometers to a few hundred nanometers were dispersed in the CSA-doped PANi matrix. PANi also acted as a protection agent for Bi particles from aggregation and perhaps oxidation. The CSA-doped PANi/Bi nanocomposite films were obtained by casting the dispersed solution onto a quartz substrate and drying. The Seebeck coefficient and the electrical conductivity of the films were measured in the temperature range from room temperature to similar to 400 K.