Preparation and Properties of Functional Graphene/Thermoplastic Polyurethane Composite Film

Abstract

The modified graphene oxide(DD-GO) was reacted by the Didodecyldimethylammonium bromide (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 TPU composite film have been significantly improved. When the mass fraction of DD-RGO is 2%, compared with the pure TPU film, the oxygen transmission rate has been reduced by 50% and the volume resistivity has been increased by 7 orders of magnitude. The barrier properties and antistatic properties of composite films have been improved significantly.