氰酸酯树脂/氧化石墨烯纳米复合材料的制备及表征

通过溶液插层的方法制备氰酸酯树脂/氧化石墨烯纳米复合材料,采用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)和热重分析(TGA)研究纳米复合材料的结构和性能,采用电子万能试验机研究纳米复合材料的力学性能。研究表明,异氰酸苯酯改性氧化石墨在二甲基甲酰胺中经超声处理后剥离形成氧化石墨烯薄片;添加氧化石墨烯后纳米复合材料的力学性能和耐热性显著改善。当氧化石墨烯的含量为基体树脂的1%时,纳米复合材料的拉伸强度、弯曲强度和冲击强度分别为82.9 MPa、148.6 MPa和12.9 kJ/m2,1000℃时的残炭率达45.1%。

Preparation and Characterization of Cyanate Ester Resin/Graphene Oxide Nanocomposites

Cyanate ester(CE) resin/graphene oxide nanocomposites were prepared via a solution intercalation method.The structures and properties of the nanocomposites were characterized by XRD,SEM,TEM and TGA.In addition,the mechanical properties of the nanocomposites were studied using mechanical testing machine.The results show that phenyl isocyanate-treated graphite oxide undergoes complete exfoliation in DMF after ultrasonic treatment and thus forms graphene oxide.The addition of graphene oxide is beneficial to improve the mechanical properties.When the graphene oxide is 1% of CE resin,the tensile strength,flexural strength and impact strength of the nanocomposites obtained arrive at 82.9 MPa,148.6 MPa and 12.9 kJ/m2,respectively.Moreover,the nanocomposites exhibit better thermal stability in comparison with neat CE resin.When the graphene oxide is 1% of CE resin,the coking yield of the nanocomposites obtained reaches 45.1% at 1000 ℃.