摘要
石墨烯由于具有高导电性、高透光率和优良热稳定性等性质,有望成为透明聚合物电极材料的优良填料。本文通过原位复合方法制备了还原氧化石墨烯/聚3,4-乙撑二氧噻吩:聚苯乙烯磺酸钠(RGO/PEDOT:PSS)复合材料,研究了PSS不同含量对复合物导电性的影响。通过X射线衍射、红外光谱、X射线光电子能谱、扫描电镜等手段对复合物进行了表征。研究表明,适当的PSS加入对复合物导电性有促进作用。当原料质量比EDOT:PSS=1:0.5时,复合物(10 wt.%RGO)导电率达到6817 S/m,是没有PSS加入下复合物电导率的2.4倍。此含量下制备的产物颗粒平均粒径5微米,并且RGO可以较好地分散在聚合物中,呈现更高的导电性。
Graphene is a promising material that can function as filler for transparent polymer electrodes in optoelectronic organic devices due to its high electrical conductivity,high transparency and thermal stability. In this paper,the graphene/ poly(3,4-ethylenedioxythiophene):poly(styrenesulfo nate)(PEDOT:PSS) composites were prepared by in-situ polymerization method. The effectiveness of PSS's content on the conductivity of the composites was demonstrated. When EDOT:PSS(mass ratio)=1:0.5,the conductivity of the composites with 10wt% graphene content reached up to 6817 S/m,which was 1.4 times higher compared to the composites without PSS addition. However,when EDOT:PSS=1:2.5,the conductivity of the 10wt% RGO/PEDOT:PSS composites was only 2243 S/m,20% lower than that without PSS addition. The composites were characterized by X-ray diffraction,infrared spectroscopy,X-ray photoelectron spectroscopy,scanning electron microscope. The results indicated that an appropriate PSS addition not only resulted into particles with uniform size(average size: 5 μm),but also improved the dispersion of graphene in polymer matrix,which contributed to a higher conductivity.
出处
《中国科技信息》
2014年第2期37-41,共5页
China Science and Technology Information
