GO/PI复合薄膜的制备及性能研究

Preparation and Properties of GO/PI Composite Film

利用改进Hummers法制备氧化石墨烯(GO),再通过溶液共混法制备氧化石墨烯/聚酰亚胺(GO/PI)复合薄膜,采用XRD、TMA、TGA等对其结构和性能进行表征。结果表明:相对于不添加GO的PI薄膜而言,当复合薄膜中的GO质量分数为0.2%时,复合薄膜的力学性能得到很大提升,其中拉伸强度提高了26.77%,断裂伸长率提高了76.47%,弹性模量基本不变。当GO质量分数为0.1%时,复合薄膜的T_(5)、T_(10)最大值分别为587.3℃、603.3℃,相对于未添加GO的PI薄膜分别提高了2.44%、1.69%。说明适量GO的加入可以显著增强复合薄膜的力学性能和热学性能。

A graphene oxide(GO)was synthesized by modified Hummers’method,and a graphene oxide/polyimide(GO/PI)composite film was prepared by solution blending method.The structure and the properties of the composite film were analyzed by XRD,TMA,TGA.The results show that compared with the PI film without GO,when the mass fraction of GO in composite film is 0.2%,the mechanical properties of the composite film increase obviously,the tensile strength increases by 26.77%,the elongation at break increases by 76.47%,and the elastic modulus changes little basically.When the mass fraction of GO is 0.1%,the maximum value of T_(5) and T_(10) of the composite film are 587.3℃and 603.3℃,which increase by 2.44%and 1.69%compared with that of the PI film without GO,respectively.It is indicated that the addition of GO with appropriate amount can enhance the mechanical properties and thermal properties of PI films.