聚3-辛基噻吩/MWNTs复合材料的导电性能研究  

Conductive Properties of Poly(3-octylthiophene)/Multi-walled Carbon Nanotubes Composites

作　　者：韩菲菲[1] 梁旦[1] 王红敏[1] 徐学诚[1] 

机构地区：[1]华东师范大学物理系纳米功能材料与器件研究中心,上海200062

出　　处：《化学学报》2009年第7期611-617,共7页Acta Chimica Sinica

基　　金：上海市纳米科技专项(No.0252nm011)基金资助项目.

摘　　要：采用在氯仿溶液中超声共混,制备聚3-辛基噻吩(P3OT)和多壁碳纳米管(MWNTs)复合材料.当MWNTs掺杂量为3%时复合材料的电导率为1.43S·m-1,达到纯MWNTs的电导率水平.用FTIR光谱,TG,UV-Vis光谱,XPS和FESEM进行研究分析,认为MWNTs的离域电子与P3OT主链上的π电子之间形成π-π共轭,增加了P3OT主链的有效共轭度,被掺杂的P3OT具有很高的电导率,提高了复合材料的导电性能.MWNTs与被掺杂的P3OT组成相对独立的导体单元,对复合材料的导电网络形成起着主要作用.Multi-walled carbon nanotubes （MWNT） were used as filler to prepare poly（3-octylthiophene） （P3OT）/MWNT composites in chloroform, which were ultrasound blended. When the content of MWNTs was 3%, the conductivity of composite almost attained that of pure MWNT （1.43 S·m^-1）. Fourier transform infrared spectroscopy （FTIR）, thermo-gravimetry （TG）, X-ray spectroscopy （XPS）, ultraviolet-visible absorption spectra （UV-Vis） and field emission scanning electron microscopy （FESEM） were employed to characterize these composites. The results suggest that π-π system is formed between the delocalized electrons in MWNT and the π-electrons in the conjugated main chain of P3OT. The effectively conjugated chain of P3OT is prolonged by MWNTs. The doped P3OT has a high conductivity and can improve the conductivity of composites. MWNT was combined with the doped P3OT to form individual conductive units, which play a key role in forming the conducting net of composites.

关 键 词：聚3-辛基噻吩 碳纳米管 独立导电单元 复合材料 

分 类 号：TQ317[化学工程—高聚物工业]