摘要
通过Staudenmaier法制备了完全氧化的氧化石墨(GO),并通过高温热膨胀制备了单层石墨烯(graphene)。用FT-IR、TG和XRD对GO的氧化程度、含氧官能团进行了表征;Graphene的XRD测试结果证明了单层石墨的存在。利用超声共混法制备了graphene/PVDF介电纳米复合材料。介电性能的测试表明:Graphene的加入使PVDF介电常数大幅提高,当graphene添加量为0.25%(质量分数)时,材料介电常数接近16,是纯PVDF的1.7倍,这为石墨烯的应用和低成本介电复合材料的制备提供了新思路。
The fully oxidized graphite oxide was prepared by Staudenmaier method,and single layer of graphene was obtained through the thermal expansion mechanism.The oxide degree and oxygen containing functional groups of graphite oxide had been investigated by FT-IR,TG,XRD,etc;the existence of graphene had been proved by XRD.The graphene/PVDF nanocomposites had been prepared by ultrasonic processing and mixture method.Dielectric results showed graphene could imporve dielectric constant of PVDF,and when the quality ratio of graphene got 0.25%,the permittivity of composite got to 16,which was 1.7 times of pure PVDF.And a novel ideal of graphene＇s application and preparation high charge storage density capacitor of low cost was expolred.
出处
《化学工程师》
CAS
2011年第8期1-3,8,共4页
Chemical Engineer
基金
国家自然科学基金项目(KZ70090314)
关键词
石墨烯
复合材料
介电
graphene
composite
dielectric
