模板剂和氧化剂对聚吡咯纳米颗粒的形貌与电导率的影响

Influence of Template Agent and Oxidant on Morphology and Electrical Conductivity of Polypyrrole Nano Particles

研究了以三嵌段共聚物P123为模板剂,氯化铁或过硫酸铵作为氧化剂时,纳米结构聚吡咯的制备和形貌调控的方法,发现加入P123作为模板剂可得到球状的纳米聚吡咯,而无P123存在时产物是形状不规则的纳米颗粒。P123的浓度和氧化剂的种类均会显著地影响聚吡咯的粒径和电导率。在相同的氧化剂条件下,随着P123浓度的升高,聚吡咯的平均粒径变小。P123的加入使得聚吡咯的电导率显著提高。无论是否存在模板剂调控,氯化铁作为氧化剂得到的产物的电导率比过硫酸铵作为氧化剂得到产物的电导率大。

Synthesis and morphology control of nano-polypyrrole were studied, when P123, a kind of triblock copolymers, was used as a template agent, and ferric chloride or ammonium persulfate acted as oxidant. Spherical PPy nanoparticles were obtained when Pi23 was present, while irregular nanoparticles were gotten when P123 was absent. Both the concentration of P123 and the kind of oxidant could influence the diameter of PPy particles and the electrical conductivity of PPy. The average diameter of PPy particles decreased as the concentration of P123 increased when the same oxidant was used. The electrical conductivity of PPy was obviously increased by the presence of Pt23 in synthesis. Whether P123 was presence or not, the electrical conductivity of PPy acquired in reaction in which ferric chloride acted as the oxidant was notably higher than that of PPy acquired when ammonium persulfate acted as the oxidant .