Journal
COMPOSITES PART B-ENGINEERING
Volume 56, Issue -, Pages 408-412Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2013.08.064
Keywords
Carbon nanotubes; Polyimide; Nanocomposite; Spray winding; Multi-functional
Funding
- National High Technology Research and Development Program of China [2007AA03Z101]
- State Key Program of National Natural Science of China [51035003]
- Natural Science Foundation for the Youth [50803010, 60904056]
- National Science Foundation for Post-doctoral Scientists of China [20100470664]
- Shanghai Post-doctoral Research Funded Project [09R21410100]
- Program of Introducing Talents of Discipline to Universities [B07024]
- Shanghai University Young Teacher Training Program
- Fundamental Research Funds for the Central Universities
- Chinese Scholarship Council
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Carbon nanotubes (CNTs) have high strength and modulus, large aspect ratio, and good electrical and thermal conductivities, which make them attractive for fabricating composite. The poly(biphenyl dianhydride-p-phenylenediamine) (BPDA/PDA) polyimide has good mechanical and thermal performances and is herein used as matrix in unidirectional carbon nanotube composites for the first time. The strength and modulus of the composite increase by 2.73 and 12 times over pure BPDA-PDA polyimide, while its electrical conductivity reaches to 183 S/cm, which is 1018 times over pure polyimide. The composite has excellent high temperature resistance, and its thermal conductivity is beyond what has been achieved in previous studies. The improved properties of the composites are due to the long CNT length, high level of CNT alignment, high CNT volume fraction and good CNT dispersion in polyimide matrix. The composite is promising for applications that require high strength, lightweight, or high electrical and thermal conductivities. (C) 2013 Elsevier Ltd. All rights reserved.
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