| 流速梯度场中重新定向排列碳纳米管机理分析 |
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| 引用本文： | 戴剑锋,姚东,王青,李维学.流速梯度场中重新定向排列碳纳米管机理分析[J].甘肃科学学报,2008,20(4). |
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| 作者姓名： | 戴剑锋 姚东 王青 李维学 |
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| 作者单位： | 1. 兰州理工大学,甘肃省有色金属新材料省部共建国家重点实验室,甘肃,兰州,730050;兰州理工大学,理学院,甘肃,兰州,730050
2. 兰州理工大学,理学院,甘肃,兰州,730050 |
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| 基金项目： | 甘肃省中青年科技研究基金 |
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| 摘 要： | 理论分析了流速梯度场中碳纳米管重新定向排列机理,其断面的流速呈抛物面分布,碳纳米管在流股剪切力作用下沿拉伸方向重新定向排列.用反复拉伸法制备出了碳纳米管沿拉伸方向定向排列且均匀分散的碳纳米管/聚甲基丙烯酸甲酯复合材料,实验结果证明拉伸法和速度梯度场中定向排列碳纳米管的理论相符.
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| 关 键 词： | 碳纳米管 重新定向排列 流速梯度场 拉伸法 |
The Mechanism of the Realignment of Carbon Nanotubes in the Velocity Gradient Field |
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| DAI Jian-feng,YAO Dong,WANG Qing,LI Wei-xue.The Mechanism of the Realignment of Carbon Nanotubes in the Velocity Gradient Field[J].Journal of Gansu Sciences,2008,20(4). |
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| Authors: | DAI Jian-feng YAO Dong WANG Qing LI Wei-xue |
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| Institution: | 1.School of sciences;Lanzhou University of Science and Technolgy;Lanzhou 730050;China;2.State Key Lab.of Gansu Advanced Non-ferrous Metal Materials;China |
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| Abstract: | The mechanism of the realignment of carbon nanotubes in the velocity gradient field was studied in theory.The velocity of the section exhibited a parabolic distribution.The carbon nanotubes were orientated along the stretching direction under the action of stream shear stress in matrix.The carbon nanotubes/PMMA composite with good alignment,uniformity and dispersion of carbon nanotubes was fabricated by using repeated mechanical stretching method.This experimental result is consistent with the theoretical a... |
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| Keywords: | carbon nanotubes realignment velocity gradient field stretching method |
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