ABSTRACT

The silver nanoparticle (AgNP) coated graphene oxide (GO) hybrid nanofiller (Ag@GO) reinforced polyaniline (PANI) nanocomposite via in situ polymerisation method is synthesised. Fourier transform infrared (FTIR) spectroscopy analysis revealed the existence of chemical interactions between the Ag@GO hybrid nanofiller and the PANI matrix. The ultraviolet–visible (UV–VIS) spectroscopy showed the presence of a silver nanoparticle peak. The nanostructure morphology of scanning electron microscopy (SEM) and transmission electron microscopy (TEM) established the presence of AgNPs on the surface of the GO nanosheets that successfully reinforced into the PANI matrix. The thermogravimetric-differential scanning calorimetry (TG-DSC) thermograms revealed that the thermal stability of the PANI/Ag@GO nanocomposite was significantly enhanced due to the synergistic effect imparted by the AgNPs, GO, and PANI matrix. The dielectric relaxation spectroscopy (DRS) study indicated that the dielectric behaviour of the PANI/Ag@GO nanocomposite was enhanced because of the strong interfacial interactions existing between the Ag@GO hybrid nanofiller and PANI matrix.

Polyaniline/Ag@GO nanocomposite has been prepared via in situ polymerisation method. The results showed that the thermal stability as well as the dielectric properties of the PANI/Ag@GO nanocomposite increases due to the synergistic effect imparted by the GO, AgNP, and PANI, which may be suitable for application in the energy storage devices.

摘要

通过原位聚合方法合成了银纳米粒子（AgNP）包覆氧化石墨烯（GO）杂化纳米填料（Ag@GO）增强聚苯胺（PANI）纳米复合材料。傅里叶变换红外 (FTIR) 光谱分析揭示了 Ag@GO 杂化纳米填料和 PANI 基质之间存在化学相互作用。紫外-可见 (UV-VIS) 光谱显示存在银纳米粒子峰。扫描电子显微镜 (SEM) 和透射电子显微镜 (TEM) 的纳米结构形态确定了在 GO 纳米片表面上存在 AgNPs，并成功地增强到 PANI 基质中。热重-差示扫描量热法 (TG-DSC) 热分析图显示，由于 AgNPs、GO 和 PANI 基质的协同作用，PANI/Ag@GO 纳米复合材料的热稳定性显着增强。介电弛豫光谱 (DRS) 研究表明，由于 Ag@GO 杂化纳米填料和 PANI 基质之间存在强界面相互作用，PANI/Ag@GO 纳米复合材料的介电行为得到了增强。

聚苯胺/Ag@GO 纳米复合材料通过原位聚合法制备。结果表明，由于GO、AgNP和PANI的协同作用，PANI/Ag@GO纳米复合材料的热稳定性和介电性能提高，可能适用于储能器件。