Effect of Surface Modification of Carbon Nanotube on the Strength Properties of Carbon Nanotube/Alumina Composites and Their Fracture Process
Effect of Surface Modification of Carbon Nanotube on the Strength Properties of Carbon Nanotube/Alumina Composites and Their Fracture Process
复制标题
碳纳米管表面改性对碳纳米管/氧化铝复合材料强度性能及其断裂过程的影响
DOI：
10.1299/kikaia.77.774
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
T. Hashida
中科院分区：
文献类型：
--
作者：
K. Shirasu;G. Yamamoto;M. Omori;Y. Aizawa;T. Hashida
我们报道了多壁碳纳米管(MWCNT)/氧化铝复合材料的力学性能和微观结构，这些复合材料由酸处理后的MWCNT末端和其长度吸收带负电官能团的MWCNT制成。我们对复合材料的断口进行了观察，以评价MWCNTs的酸处理条件对复合材料力学性能以及MWCNTs的分散性和伸出长度等微观组织的影响。SEM观察发现，MWCNTs的分散性影响复合材料的力学性能，MWCNTs的伸出长度随着MWCNTs酸处理时间的增加而减小。这些观察结果表明，MWCNTs的高结构均匀性而不是拉出行为导致了MWCNTs /氧化铝复合材料力学性能的提高。为了提高复合材料的力学性能，存在一个最佳的酸处理时间。与原始MWCNTs和经酸处理的MWCNTs分别处理0、0.5、1、3和4小时相比，经酸处理2小时的MWCNTs的分散性和复合材料的力学性能均有所提高。
We report the mechanical properties and microstructures of multi-walled carbon nanotube (MWCNT)/alumina composites made with MWCNTs that absorb negatively charged functional groups at the MWCNT ends and along their length from an acid treatment. We conducted the fracture surface observations of the composites, in order to evaluate the effects of the acid treatment conditions of MWCNTs on the mechanical properties of the composites and the microstructures such as dispersibility and protrusion length of MWCNTs. According to the SEM observations, it was found that the dispersibility of MWCNTs affected the mechanical properties of the composites, and the protrusion length of MWCNTs decreased with increasing of the acid treatment time of MWCNTs. These observations revealed that the high structural homogeneity rather than pullout behavior of MWCNTs leads to an increase in the mechanical properties of the MWCNT/alumina composite. There is an optimal acid treatment time for improving the mechanical properties of the composites. The dispersibility of the MWCNTs and mechanical properties of the composites was increased by the acid treatment with treated for 2 hours compared to the pristine MWCNTs and acid treatment MWCNTs with treated for 0, 0.5, 1, 3 and 4 hours.