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Mechanical properties of polyimide/multi-walled carbon nanotube composite fibers

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Abstract

A series of polyimide (PI)/multi-walled carbon nanotube (MWCNT) composite fibers were prepared by copolymerizing a mixture of monomers and carboxylic-functionalized MWCNTs, followed by dry-jet wet spinning, thermal imidization, and hot-drawing process. The content of the carboxylic groups of MWCNTs significantly increased when treated with mixed acid, whereas their length decreased with treatment time. Both the carboxylic content and length of MWCNTs influenced the mechanical properties of the composite fibers. Fiber added with 0.1 wt% MWCNTs treated for 4 h exhibited the best mechanical properties, i.e., 1.4 GPa tensile strength and 14.30% elongation at break, which were 51% and 32% higher than those of pure PI fibers, respectively. These results indicated that a suitable MWCNT content strengthened and toughened the resultant PI composite fibers, simultaneously. Moreover, raising draw ratio resulted in the increase of tensile strength and tensile modulus of the composite fibers.

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Authors and Affiliations

  1. Polymer Composites Engineering Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China

    Zhi-xin Dong, Chao Zheng, Guo-min Li, Fang-fang Liu & Xue-peng Qiu  (邱雪鹏)

  2. Academy of Space Electronic Information Technology, Xi’an, 710100, China

    Tao Feng

Authors
  1. Zhi-xin Dong
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  2. Tao Feng
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  3. Chao Zheng
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  4. Guo-min Li
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  5. Fang-fang Liu
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  6. Xue-peng Qiu  (邱雪鹏)
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Corresponding author

Correspondence to Xue-peng Qiu  (邱雪鹏).

Additional information

This work was financially supported by the National Basic Research Program of China (No. 2014CB643604) and the National Natural Science Foundation of China (No. 51173178).

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Dong, Zx., Feng, T., Zheng, C. et al. Mechanical properties of polyimide/multi-walled carbon nanotube composite fibers. Chin J Polym Sci 34, 1386–1395 (2016). https://doi.org/10.1007/s10118-016-1841-1

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  • DOI: https://doi.org/10.1007/s10118-016-1841-1

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