功能化石墨烯纳米带-纳米碳纤维/热塑性聚氨酯薄膜的制备及性能

Fabrication and Properties of Functionalized Graphene Nanoribbons-Carbon Nanofibres/Thermoplastic Polyurethane Composite Films

利用溶液涂覆成膜工艺在涂膜机上制得功能化石墨烯纳米带-纳米碳纤维/热塑性聚氨酯(FGNRs-CNFs/TPU)复合材料薄膜。采用红外光谱、X射线衍射、X射线光电子能谱、透射电镜对所得FGNRs-CNFs的结构与性能进行表征,并结合复合材料薄膜的氧气透过率和体积电阻率测试以及断面形貌观察,研究了不同含量的FGNRs-CNFs对TPU复合材料薄膜阻隔和抗静电性能的影响。结果显示,KH-550成功接枝在GNRs上,并且FGNRs附着在骨架CNFs上形成稳定的FGNRs-CNFs网络结构,这有利于其在TPU中均匀分散;相比于纯TPU薄膜,当FGNRs-CNFs质量分数为1%时,FGNRsCNFs/TPU复合材料薄膜的氧气透过率降低了68.8%,阻隔性能得到大幅度提升;石墨烯纳米带与纳米碳纤维构建导电网络,当添加量为0.6%时,复合材料薄膜导电性能提升了7个数量级,表现出优良的室温导电性能。

FGNRs-CNFs / thermoplastic polyurethane（ TPU） composite films were prepared by solution coating method on a coating machine. FT-IR,XRD,XPS and TEM were used to characterize the structure and properties of the asprepared FGNRs-CNFs. Meanwhile,combining with the oxygen transmission rate,the volume resistivity test,and the fractured surface morphology,the effect of different FGNRs-CNFs content on the barrier and antistatic properties of TPU composite films was studied. The results show that KH-550 is successfully grafted on GNRs,and the FGNRs adhere to the surface of the CNFs to forming stable FGNRs-CNFs network structure,which is beneficial for the dispersion of FGNRs-CNFs in TPU matrix. Comparing with the pure TPU,the oxygen transmission rate of the FGNRs-CNFs / TPU composite films is reduced by 68. 8%,and the barrier property is improved greatly when the mass fraction of the FGNRs-CNFs is 1%; the conductivity of FGNRs-CNFs / TPU composite films is promoted by 7 orders of magnitude as the FGNRs-CNFs mass fraction is 0. 6%,because the formation of conductive network between FGNRs and CNFs improves the room temperature conductivity of composite films.