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以三氯化铁(FeCl3)为氧化剂,十二烷基磺酸钠(sodium dodecylsulfonate,DSNa)为掺杂剂,使吡咯单体(pyrrole,Py)在凹凸棒石(attapulgite,ATP)的表面发生原位聚合反应,制备出聚吡咯/凹凸棒石(polypyrrole/attapulgite,PPy/ATP)纳米导电复合材料。研究了吡咯用量、聚合温度、聚合时间、FeCl3用量以及DSNa用量对纳米导电复合材料体积电阻率的影响,确定了制备纳米导电复合材料的工艺条件。通过X射线衍射、热重–差热分析、Fourier红外光谱、Raman光谱和透射电子显微镜对纳米复合材料进行表征,结果表明:当吡咯用量(以ATP的质量计)为30%,FeCl3与Py的摩尔比为2.3,DSNa的浓度为0.02g/mL时,20℃反应3h得到的PPy/ATP复合材料的体积电阻率可达7Ω·cm,聚吡咯以非晶态形式存在于凹凸棒石表面,两者之间的作用为物理作用。
Pyrrole (Py) was generated on the surface of attapulgite (ATP) using ferric chloride (FeCl3) as oxidant and sodium dodecylsulfonate (DSNa) as dopant In situ polymerization, polypyrrole / attapulgite (PPy / ATP) nanocomposites were prepared. The effects of the amount of pyrrole, the polymerization temperature, the polymerization time, the dosage of FeCl3 and the amount of DSNa on the volume resistivity of the nanocomposite were investigated. The technological conditions for preparing the nanocomposite were determined. The nanocomposites were characterized by X-ray diffraction, TG-DTA, Fourier transform infrared spectroscopy, Fourier transform infrared spectroscopy and transmission electron microscopy. The results showed that when the amount of pyrrole (mass fraction of ATP) was 30% The volume resistivity of PPy / ATP composites obtained at 20 ℃ for 3h can reach 7Ω · cm, the polypyrrole exists in amorphous state on the surface of attapulgite, The role of the two for the physical role.