聚(吡咯/二苯胺磺酸)/石墨烯复合材料的制备及其抗静电性能研究

Preparation and antistatic property of poly (pyrrole/ 4-sulfonic diphenylamine) / graphene composite

摘要:

采用化学氧化聚合法，以石墨烯（RGO）为掺杂剂，吡咯（Py）和二苯胺磺酸（SD）共聚制备了导电复合材料。通过正交实验和分散性实验确定了最佳合成条件为：以FeCl3･6H2O为氧化剂，氧化剂与单体的摩尔比为1:1，Py与SD的摩尔比为7:3（总量为0.01 mol），RGO添加量为0.05 g；在此条件下制备的复合材料电导率为12.05 S/cm，且具有良好的水分散性。用傅里叶变换红外（FTIR）光谱和X射线衍射（XRD）对其结构进行了表征，并使用热重分析仪（TGA）对复合材料的热稳定性进行了测试。结果表明，SD结构单元成功嵌入聚吡咯（PPy）的分子链中，RGO的掺杂使复合材料电导率和热稳定性都有了明显提升。将复合材料作为导电填料加入到水性聚氨酯中，考察了涂层的抗静电性能和机械性能，在添加量为4%时，涂层的综合性能较好，涂层表面电阻率可达8.65×107 Ω。

Abstract:

The conductive composites were prepared from pyrrole (Py) and 4-sulfonic diphenylamine (SD) by chemico-oxidative method using graphene (RGO) as the dopant. Through orthogonal test and dispersive test, we found the best conditions of synthesizing the composites were as follows: the oxidant is FeCl3･6H2O, the mole ratio of oxidant and monomer is 1:1, the mole ratio of Py and SD is 7:3(total amount is 0.01 mol), the doping amount of graphene is 0.05 g; Under the above conditions, the conductivity of the composite was 12.05 S/cm, and it had better dispersion in water. The composites were characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The thermal stability of the composites was tested by Thermal Gravimetric Analyzer (TGA). Results showed that the structure unit of SD was successfully embedded in the molecular chain of the polypyrrole (PPy), conductivity and thermal stability of the composites were significantly improved by the doping of RGO. Meanwhile, the composite was added as conductive filler to the waterborne polyurethane to study antistatic performance and mechanical properties of the coating, the comprehensive performance of the coating is better and the surface resistivity of the film can reach 8.65×107 Ω when the added amount is 4%.