Improving the electrical conductivity of a carbon nanotube/polypropylene composite by vibration during injection-moulding
Improving the electrical conductivity of a carbon nanotube/polypropylene composite by vibration during injection-moulding
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通过注塑过程中的振动提高碳纳米管/聚丙烯复合材料的导电性
DOI：
10.1016/j.carbon.2011.03.054
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发表时间：
2011-08
期刊：
影响因子：
10.9
通讯作者：
Qian, Xinyuan
中科院分区：
文献类型：
--
作者：
Shen, Kaizhi;Liu, Fanghui;Yang, Liangbo;Xia, Hesheng;Zhang, Jie;Qian, Xinyuan
采用振动注射成型技术制备了等规聚丙烯/多壁碳纳米管（iPP/MWCNT）复合材料。研究了振动场对样品导电性能的影响。结果表明，当碳纳米管含量大于2 wt.%时，振动注射成型样品的电导率远高于常规注射成型样品和低于6重量%。此外，振动注射成型样品的电导率略高于压缩成型样品。较高的电导率是由于振动注射成型过程中周期性剪切引起的多壁碳纳米管运动。团聚体或单个MWCNT沿着流动方向被解缠结、拉伸和取向，导致更好的导电路径，从而大大提高了电导率。电导率随着振动频率的增加而增加。在不同振动频率下制备的样品之间的电压-电流关系的差异表明，iPP/MWCNT复合材料的导电机制从隧道转变为欧姆效应。与传统的注塑成型样品相比，没有损失的机械性能。
An isotactic polypropylene/multi-wall carbon nanotube (iPP/MWCNT) composite was prepared by a vibration injection moulding technique. The effect of the vibration field on the electrical conductivity property of samples was investigated. The results show that the electrical conductivities of the samples prepared by vibration injection moulding was far higher than those of samples prepared by conventional injection moulding when the CNT concentration are above 2 wt.% and below 6 wt.%. Besides the electrical conductivity of vibration injection moulded samples are a little higher than those of the compression moulded samples. The higher conductivity was resulted from the MWCNT movement induced by the periodical shear during vibration injection moulding. The agglomerates or individual MWCNT were disentangled, stretched and oriented along the flow direction, resulting in better conducting paths thus greatly increased the electrical conductivity. The electrical conductivity increased with increasing vibration frequency. The difference in the voltage–current relationships among the samples prepared at different vibration frequencies suggests that the mechanism of electrical conductivity of iPP/MWCNT composite changed from a tunnel to an ohmic effect. Compared with conventional injection moulded samples, there was no loss of mechanical properties.
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影响因子：
4
作者：
Yunze Long;Zhaojia Chen;Xuetong Zhang;Jin Zhang;Zhongfan Liu
通讯作者：
Yunze Long;Zhaojia Chen;Xuetong Zhang;Jin Zhang;Zhongfan Liu
影响因子：
5.5
作者：
M. Arlen;David H. Wang;J. Jacobs;R. Justice;A. Trionfi;Julia W. P. Hsu;Dale Schaffer;Loon-Seng Tan-L
通讯作者：
M. Arlen;David H. Wang;J. Jacobs;R. Justice;A. Trionfi;Julia W. P. Hsu;Dale Schaffer;Loon-Seng Tan-L
影响因子：
3.7
作者：
Celzard, A;McRae, E;Mareche, JF
通讯作者：
Mareche, JF
影响因子：
4.6
作者：
Yijin Xu;B. Higgins;W. Brittain
通讯作者：
Yijin Xu;B. Higgins;W. Brittain
影响因子：
9.1
作者：
W. Bauhofer;J. Kovacs
通讯作者：
W. Bauhofer;J. Kovacs