纳米石墨负载功能化石墨烯纳米带/EVA复合材料薄膜的性能及表征
Fabrication and properties of functionalized graphene nanoribbons-nanographite/EVA composite films

采用十二烷基硫酸钠改善纳米石墨（CNPs）在水溶液中的分散性，使其均匀负载至功能化石墨烯纳米带（EGNRs）上，制得功能化石墨烯纳米带-纳米石墨复合体（EGNRs75%-CNPs），随后利用溶液涂覆成膜工艺在涂膜机上制得EGNRs75%-CNPs/乙烯-醋酸乙烯共聚物（EVA）复合材料薄膜。采用FTIR、XRD、XPS、TEM、FE-SEM、氧气透过仪、高阻计对不同EGNRs75%-CNPs含量的EGNRs75%-CNPs/EVA复合材料薄膜进行了结构和性能表征。研究表明：EGNRs75%-CNPs以3D网络形式存在，能够抑制纳米带团聚，说明其与EVA基体相容性好。当EGNRs75%-CNPs质量分数为1%时，EGNRs75%-CNPs/EVA复合材料薄膜的氧气透过率降低了67.6%，阻隔性能提高明显；当质量分数为0.8%时，CNPs负载到EGNRs构建3D导电网络，协同发挥增强作用，EGNRs75%-CNPs/EVA复合材料薄膜导电性能提升了约8个数量级，表现出了优良的室温导电性能。 The dispersion of nanographite (CNPs) in aqueous solution was first modified by sodium dodecyl sulfate (SDS) in order to prepare uniformly distributed CNPs on the surface of functioned graphene nanoribbons (EGNRs). Afterwards, the EGNRs75%-CNPs/EVA composite films were prepared by solution coating method on a coating machine. The morphology and properties of EGNRs75%-CNPs/EVA composite films were investigated by FTIR, XRD, XPS, FE-SEM, TEM, oxygen transmission rate and high resistance meter. The results show that the conductive network of EGNRs75%-CNPs can be observed after being loaded with CNPs, which is beneficial to the dispersion of EGNRs75%-CNPs in EVA matrix. When the mass fraction of EGNRs75%-CNPs is 1%, compared with that of the pure EVA, the oxygen transmission rate of EGNRs75%-CNPs/EVA composite films is reduced by 67.6%, thus the barrier property has improved deeply. EGNRs75%-CNPs/EVA composite films' conductivity has been improved by 8 orders of magnitude as EGNRs75%-CNPs mass fraction is 0.8% because of the formation of 3D conductive network, which exhibit the excellent room temperature conductivity. 福建省科技计划（2015 H0016）；福州市科技计划（2014-G-72）