论文部分内容阅读
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(EGNRs_(75%)-CNPs),随后利用溶液涂覆成膜工艺在涂膜机上制得EGNRs_(75%)-CNPs/乙烯-醋酸乙烯共聚物(EVA)复合材料薄膜。采用FTIR、XRD、XPS、TEM、FESEM、氧气透过仪、高阻计对不同EGNRs_(75%)-CNPs含量的EGNRs_(75%)-CNPs/EVA复合材料薄膜进行了结构和性能表征。研究表明:EGNRs_(75%)-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EGNRs_(75%)-CNPs质量分数为1%时,EGNRs_(75%)-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,EGNRs_(75%)-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。
Adopting sodium dodecyl sulfate to improve the dispersibility of CNPs in aqueous solution and uniformly loading them onto functionalized graphene nanoribbons (EGNRs), the functionalized graphene nanoribbon-nanometer graphite composites ( EGNRs_ (75%) - CNPs), and subsequently prepared EGNRs_ (75%) - CNPs / ethylene-vinyl acetate copolymer (EVA) composite films on a film coating machine using a solution- The structure and properties of EGNRs_ (75%) - CNPs / EVA composites with different EGNRs_ (75%) - CNPs contents were characterized by FTIR, XRD, XPS, TEM, FESEM, The results show that: EGNRs_ (75%) - CNPs exists in the form of 3D network and can inhibit the agglomeration of nanoribbons, indicating that they have good compatibility with EVA matrix. When the mass fraction of EGNRs_ (75%) - CNPs was 1%, the oxygen permeability of EGNRs_ (75%) - CNPs / EVA composite films decreased by 67.6% and the barrier properties improved obviously. CNPs loaded into EGNRs to construct 3D conductive network, synergistically exert enhancement effect, the conductivity of EGNRs_ (75%) - CNPs / EVA composite films has been enhanced by about 8 orders of magnitude, showing excellent room temperature conductivity.