中文摘要：

介绍了一种简单、新颖、环保的制备甲壳素/多壁碳纳米管复合电极的工艺方法。先利用一次研磨法制备出甲壳素纳米纤维（CNFs）,纤维直径分布在10~30 nm之间;然后使用十二烷基苯磺酸钠（SDBS）作为多壁碳纳米管的分散剂,通过超声混合法制备CNFs/碳纳米管（CNTs）复合电极;再使用扫描电镜、力学试验机、四探针、热机械分析仪、电化学工作站等对材料性能进行测试。结果表明,CNFs/CNTs复合薄膜内部纤维相互交织,呈现三维网状结构。在此复合物中,甲壳素起到了增强力学性能和抑制碳纳米管团聚的作用,力学性能随着碳纳米管含量的增加而降低,拉伸强度和杨氏模量低至46.23 MPa和1.18 GPa,相比于甲壳素纯膜（113.48 MPa和3.72 GPa）分别减少了59.3%和68.3%。热膨胀系数从2.84×10-5m/K降至3.42×10-6m/K,仅有甲壳素纯膜的12%。CNFs/CNTs复合材料的电导率（1 471.9 S/m）显著提高且电化学性能优异,电容量在经过1 000次充放电循环之后依然保持在99%以上,在扫描速率为10 m V/s时,复合薄膜的电容量达到48.1 F/g。制得的柔性电极材料,成本低廉且环保,今后在便携可折叠装置和固态超级电容器电极方面均具有巨大的应用潜力。

英文摘要：

In this study,the chitin nanofibers（ CNFs） / multi-walled carbon nanotubes（ CNTs） composite electrode was fabricated by a novel,eco-friendly and simple method. One-time pass mechanical process（ grinding） was used to make CNFs. The diameter of most CNFs ranged from 10 nm to 30 nm. CNTs powers were dispersed using the ultrasonic with the sodium dodecyl benzene sulfonate（ SDBS） as a dispersant. Utilizing the ultrasonic dispersion and vacuum-filter method,the composite electrode was fabricated. The scanning electron microscope（ SEM）,Four-point probe device,Universal mechanical testing machine,Thermomechanical analysis（ TMA） and CHI600 Eelectrochemical work station were used to examine the properties of the nano composite materials. SEM images indicated that the carbon nanotubes were well incorporated and penetrated throughout the compact three-dimensional chitin nanofiber network. In this network structural composite,CNFs played an important role in restricting the reunite of CNTs and improving the tensile property. The tensile strength of the CNFs / CNTs composite electrodes decreased with the increase in carbon nanotubes.Compared to the neat CNFs films,the tensile strength and Young＇s modulus were reduced from 113. 48 MPa and 3. 72 GPa to 46. 23 MPa and 1. 18 GPa,which were counted for about 59. 3% and 68. 3% reductions,respectively. The coefficient of thermal expansion dramatically decreased from 2. 84 × 10- 5to 3. 42 × 10- 6m / K,which was about 12% of the CNFs films. However,as the data shown,the higher CNTs content in the sample,the higher electrical conductivity was obtained（1 471. 9 S / m）. Furthermore,the composite electrodes had good electrochemical performance. The capacitance performance of the electrode was found to be stable above 99% after 1 000 charge-discharge cycles. At 10 m V / s,the specific capacitance of CNFs / CNTs electrode reached 48. 1 F / g. In addition,the facile,eco-friendly and low-cost composite film may have great underlying applications in development o