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对石墨烯进行功能化改性(FRGO)后加入原始碳纳米管(CNTs)通过非共价改性制得在N,N-二甲基甲酰胺(DMF)中均匀分散的FRGO-CNTs杂化粒子,最后通过溶液涂覆成形制备FRGO-CNTs/热塑性聚氨酯复合材料膜(FRGO-CNTs/TPU)。利用FTIR、XPS、XRD、FE-SEM、TGA、氧气透过仪、高阻计及万能试验机对FRGO-CNTs/TPU复合材料结构和性能进行表征。结果表明:FRGO与CNTs之间通过π-π共轭作用发挥协同效应,且与TPU基体相容性好。当FRGO-CNTs与TPU质量比为2%时,热分解温度提高了49℃,氧气透过率下降了53.2%;FRGO大的比表面积与CNTs高的长径比能有效的在TPU基体中构建导电网络,当FRGO-CNTs与TPU质量比仅为0.8%时,FRGO-CNTs/TPU复合材料的体积电阻率下降7个数量级。其拉伸强度和断裂伸长率随填充剂含量的增加呈现出先上升后下降的趋势。
After the functionalization of graphene (FRGO) was added to the original carbon nanotubes (CNTs) by non-covalent modification made in N, N-dimethylformamide (DMF) uniformly dispersed in the FRGO-CNTs hybrid Particles, and finally prepared by solution coating forming FRGO-CNTs / thermoplastic polyurethane composite film (FRGO-CNTs / TPU). The structure and properties of FRGO-CNTs / TPU composites were characterized by means of FTIR, XPS, XRD, FE-SEM, TGA, oxygen permeation, high resistance and universal testing machine. The results show that: FRGO and CNTs play a synergistic effect through π-π conjugation, and have good compatibility with TPU matrix. When the mass ratio of FRGO-CNTs to TPU is 2%, the pyrolysis temperature is increased by 49 ℃ and the oxygen transmission rate is reduced by 53.2%. The large specific surface area of FRGO and the high aspect ratio of CNTs can be effectively constructed in TPU matrix When the mass ratio of FRGO-CNTs to TPU is only 0.8%, the volume resistivity of FRGO-CNTs / TPU composites decreases by seven orders of magnitude. Tensile strength and elongation at break showed a trend of first increasing and then decreasing with the increase of filler content.