聚苯胺/聚氨酯导电海绵的制备及其性质研究

Study on Preparation and Properties of Conducting Polyaniline/Polyurethane Foam

通过化学氧化聚合法在聚氨酯海绵(PUF)载体上原位生长聚苯胺(PAn),获得了体积电阻率可调的PAn//PUF导电海绵复合物.研究了苯胺单体浓度、掺杂剂酸的种类和浓度、氧化剂的浓度对PAn/PUF复合物体积电阻率的影响规律,考察了合成产物的体积电阻率的稳定性.通过扫描电镜SEM和傅立叶红外对复合物进行了表征.结果表明,PAn/PUF复合物的体积电阻率与其制备条件密切有关,其体积电阻率在104～108Ω.cm范围里可调,大分子酸掺杂获得的复合物具有良好的电导性和环境稳定性.实验发现,制备的PAn/PUF复合物对银离子具有很好的还原作用.

Conducting polyaniline/polyurethane foam composite with adjustable volume electrical resistivity was prepared by in-situ chemical oxidative polymerization of aniline on the cartier of polyurethane foam （PUF）. The influence of aniline monomer concentration, the kind and its concentrations of medium acid , the molar ratio of monomer to oxidant on the volume electrical resistivity was investigated. The stability on volume electrical resistivity of as-prepared composite was also studied. SEM and FTIR techniques were used for characterizing the composites. The results show that the preparation conditions have significant influences on volume electrical resistivity of resulting composites whose volume electrical resistivity can be controlled in the range of 10^4 -10^8Ω· cm. And the composite doped by macro-molecule acid has good electrical conductivity and environmental stability. At the same time, the PAn/PUF composite has a high performance for recovering silver ion.