导电复合材料磺化聚苯乙炔/多壁碳纳米管研究

将磺化聚苯乙炔（SPPA）与多壁碳纳米管（MWNT）超声共混制备得到SPPA/MWNT复合材料，用四探针、X光电子能谱、紫外 可见 近红外光谱、X射线衍射和场发射扫描电镜等方法对复合材料进行研究.结果显示：MWNT与SPPA之间存在较强的相互作用；SPPA/MWNT 复合材料导电特性具有低临界阈值和电阻负温度系数（NTC）等现象.表明在复合材料中SPPA与MWNT相互作用发生电荷转移，使MWNT周围的SPPA具有较高的电导率，这种具有较高电导率的SPPA彼此之间可相互接触形成导电通路.

Research on Electrical Composites: Multiwalled Carbon Nanotube/Sulfonated Polyphenylacetylene(Chinese)

Composites-Sulfonated Polyphenylacetylene/Multiwalled Carbon Nanotube (SPPA/ MWNT)were prepared by mixing SPPA with MWNT under ultrasonic bath. The composites were studied using Four-probe, X-Ray photoelectron Spectroscope, UV-Vis-NIR spectropho tometer, X-Ray diffraction, Field Emission Scanning Electron Microscope (FESEM), etc. The results show strong interactions between MWNT and SPPA as well as a behavior of Negative Temperature Coefficient (NTC) of resistance. The phenomenon of the low percolation threshold and twice obvious increases of electrical conductivity were also found in the composites. It is as sumed that SPPA with higher electrical conductivity due to charge transfer between SPPA and MWNT,which were affected by interaction, contacts with each other. Thus it forms conductive networks in the composites.