中文摘要：

以纳米纤维素（CNF）为分散介质,氧化石墨烯（GO）为增强介质,多壁碳纳米管（MWNT）为导电介质,机械搅拌后真空抽滤制备CNF/GO/MWNT复合薄膜,研究GO/MWNT含量对复合薄膜性能的影响,采用红外、Raman光谱、扫描电镜、透射电镜对薄膜的结构和形貌进行表征,采用动态力学分析、热重分析和电导率测试研究薄膜的力学性能、热性能和电性能。结果表明,薄膜的拉伸强度随GO含量的增加先增加后减小,薄膜电导率和耐热性随MWNT用量增加而增加,当CNF/GO/MWNT质量比为20/10/70时,复合薄膜性能最佳,薄膜的电导率达到236.07 S/m,拉伸强度为25.13 MPa,180~300℃区间材料的热失重为9.45%,最大热分解速率对应温度达到322.69℃。扫描电镜、透射电镜结果表明,GO在材料内部呈现规整结构,CNF能有效分散GO/MWNT,形成均匀分散液。

英文摘要：

In order to combine the advantages of nano cellulose fiber （CNF） and carbon materials, CNF was used as dispersion medium, graphene oxide （GO） as reinforcing phase, multiwalled carbon nanotube （MWNT） as conducting medium, to fabricate the composite film by CNF/GO/MWNT dispersion through the vacuum filtration, and the effects of GO/MWNT contents on the performance of the film were studied. The structure of the materials were characterized by FT-IR and Raman spectrum, the mechanical properties, thermal properties and electrical properties were characterized by DMA, TG and conductivity tester, the morphology of films were observed by SEM and TEM. The results show that the tensile strength increases firstly and then decreases with increase of the GO content, when the mass ratio of CNF/GO/MWNT is 20/10/70, the performance of the film is the best, the conductivity reaches 236.07 S/m, tensile strength is 25.13 MPa, the mass loss is 9.45% between 180℃; and 300 ℃, the temperature of the maximum decomposition rate is 322.69℃. SEM and TEM results show that GO has a well-defined structure in materials, and CNF could disperse the GO/MWNT effectively.