碳纳米管/聚苯胺复合物的制备及其吸波性能的研究

Study on preparation and microwave absorbing properties of carbon nanotubes/PANI composites

采用原位聚合法制备碳纳米管/聚苯胺复合物,并通过透射电镜（TEM）、红外光谱（FT-IR）、热重分析（TGA）对样品进行表征,用矢量网络分析仪系统检测了一系列复合物的电磁参数,计算并分析了聚合时间、聚合温度、盐酸浓度、涂层厚度等工艺条件对复合物吸波性能的影响.结果表明,原位聚合法制得了具有核G壳结构的复合物;且聚合时间为6h、聚合温度为20℃、盐酸浓度为0.05 mol/L 时,复合物在8-18GHz频率范围内具有较好的微波吸收性能.

Carbon nanotubes / PANI composites were prepared by the in-situ polymerization. The morphology,constitution and thermal stability of the products were characterized by TEM,FT-IR and TGA respectively. The electromagnetism parameters of the composites were investigated by vector network analyzer. On the basis of the parameters,the influence of polymerization time,polymerization temperature,acid concentration and coating thickness on the microwave absorbing properties were evaluated. Results show that the core-shell structure composites are obtained. When the polymerization time was 6 h,the polymerization temperature was 20 ℃ and the acid concentration was 0. 05 mol / L respectively,the samples have good microwave absorbing properties in the frequency range from 8 to 18 GHz.