采用双十二烷基二甲基溴化铵（DDAB）插层改性氧化石墨烯（DD‐GO），再用抗坏血酸进行还原制得功能石墨烯（DD‐RGO）。采用溶液成形的方法在涂膜机上制备功能石墨烯（DD‐RGO）／热塑性聚氨酯（TPU）复合材料膜，并利用FTIR、XRD、FE‐SEM、高阻计、氧气透过仪对DD‐RGO／TUP复合材料膜结构和性能进行表征。结果表明：经DDAB改性后的石墨烯能在T PU基体中能以褶皱层状的形式均匀的分散，并提高T PU的热稳定性、阻隔性与抗静电性。当DD‐RGO的添加量为2％时，复合材料膜的阻隔性与导电性相对于纯 T PU分别提高了50％与7个数量级，阻隔性与抗静电性明显提高。
The modified graphene oxide(DD‐GO) was reacted by the Didodecyldimethylammonium bro‐mide ( DDAB) and graphene oxide ,and then reduced via L‐ascorbic acid to obtain functional graphene (DD‐RGO) .Functional graphene (DD‐RGO)/thermoplastic polyurethane (TPU) composite films were prepared by solution on the coating machine .The morphology and properties of DD‐RGO/TPU composite films were investigated by FTIR ,XRD ,FE‐SEM ,oxygen transmission rate tester and high resistance meter .The results show that DD‐RGO with fold layer structure is evenly dispersed in TPU matrix ,and the thermal stability ,barrier properties and antistatic properties of T PU composite film have been significantly improved .When the mass fraction of DD‐RGO is 2% ,compared with the pure T PU film ,the oxygen transmission rate has been reduced by 50% and the volume resistivity has been increased by 7 orders of magnitude .T he barrier properties and antistatic properties of composite films have been improved significantly .
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