Aligned multi-walled carbon nanotube-reinforced composites: processing and mechanical characterization
Aligned multi-walled carbon nanotube-reinforced composites: processing and mechanical characterization
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DOI：
10.1088/0022-3727/35/16/103
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发表时间：
2002-08-21
影响因子：
3.4
通讯作者：
Chou, TW
中科院分区：
文献类型：
--
作者：
Thostenson, ET;Chou, TW
碳纳米管由于其特殊的物理和机械性能而受到相当大的关注。在纳米尺度下观察到的这些特性促使研究人员利用碳纳米管作为复合材料的增强材料。在本研究中，使用微型双螺杆挤出机实现多壁碳纳米管在聚苯乙烯基体中的分散。通过将聚合物熔体挤出通过矩形模头并在冷却之前拉伸膜来制备高度对齐的纳米复合材料膜。通过首先用双螺杆挤出机实现分散，然后使用液压机压制膜来生产无规取向的纳米复合材料。取向和无规纳米复合膜的拉伸行为与5重量%，表征了纳米管的负载。纳米管的加入增加了聚合物膜的拉伸模量、屈服强度和极限强度，并且对齐的纳米管复合材料的弹性模量的改善是随机取向的复合材料的改善的五倍。
Carbon nanotubes have been the subject of considerable attention because of their exceptional physical and mechanical properties. These properties observed at the nanoscale have motivated researchers to utilize carbon nanotubes as reinforcement in composite materials. In this research, a micro-scale twin-screw extruder was used to achieve dispersion of multi-walled carbon nanotubes in a polystyrene matrix. Highly aligned nanocomposite films were produced by extruding the polymer melt through a rectangular die and drawing the film prior to cooling. Randomly oriented nanocomposites were produced by achieving dispersion first with the twin-screw extruder followed by pressing a film using a hydraulic press. The tensile behaviour of the aligned and random nanocomposite films with 5 wt.% loading of nanotubes were characterized. Addition of nanotubes increased the tensile modulus, yield strength and ultimate strengths of the polymer films, and the improvement in elastic modulus with the aligned nanotube composite is five times greater than the improvement for the randomly oriented composite.