文献综述
用TEMPO氧化纳米纤维素复合单壁碳纳米管制备复合纤维
摘 要
高导电性和机械强度的微纤维在能量存储、热管理和可穿戴电子领域具有很大的吸引力。本文采用快速成型的湿法纺丝的方式研制了一种高导电性、高强度的碳纳米管/纳米纤化纤维素复合微纤维。通过超声结合三辊研磨的方式成功将单壁碳纳米管分散在TEMPO氧化的纳米纤维素悬浮液当中。根据实验发现，当单壁碳纳米管填充量在10wt%时候，单壁碳纳米管可以很好的镶嵌在纳米纤维素网络当中，进而弥补了相互之间堆砌过程中纳米结构上缺陷使得复合微纤维的拉伸强度达到246.96plusmn;5.01MPa，断裂伸长率达到11.77%plusmn;1.4%。但随着单壁碳纳米管的填充量的增加，碳纳米管之间出现团聚的现象，使得拉伸强度下降到232.2plusmn;8.54MPa，断裂伸长率下降到4.05%plusmn;0.4%。通过超声和三辊研磨以及湿法纺丝三种方式的结合，可以制备连续化的高强度的复合微纤维进而有望成为可穿戴电子设备的候选材料。
关键词：纳米纤维素；单壁碳纳米管；三辊研磨；复合纤维
Preparation of composite fiber by oxidizing nanocellulose composite single-walled carbon nanotubes with TEMPO
Microfibers with high electrical conductivity and mechanical strength are attractive in the fields of energy storage, thermal management and wearable electronics. In this paper, a high conductivity, high strength carbon nanotube/nanofibrillated cellulose composite microfiber was developed by rapid prototyping wet spinning. The single-walled carbon nanotubes were successfully dispersed in the TEMPO-oxidized nanocellulose suspension by ultrasonic combined with three-roll grinding. According to the experiment, when the filling amount of single-walled carbon nanotubes is 10wt%, single-walled carbon nanotubes can be well embedded in the nanocellulose network, thereby making up for the defects in the nanostructures during the stacking process. The tensile strength of the fiber reached 246.96plusmn;5.01 MPa, and the elongation at break reached 11.77%plusmn;1.4%. However, as the filling amount of single-walled carbon nanotubes increases, agglomeration occurs between the carbon nanotubes, so that the tensile strength decreases to 232.2plusmn;8.54 MPa, and the elongation at break decreases to 4.05%plusmn;0.4%. By combining ultrasonic and three-roll milling and wet spinning, continuous high-strength composite microfibers can be prepared and are expected to be candidates for wearable electronic devices.
Key words：Nanocellulose；single-walled carbon nanotubes； three-roll mill；composite fiber
1纤维素现状
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