Journal
MACROMOLECULAR MATERIALS AND ENGINEERING
Volume 300, Issue 5, Pages 482-496Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mame.201400361
Keywords
carbon nanotubes; chaotic mixing; composites; electrical modeling; electrical properties
Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Alberta Innovates Technology Future (AITF)
- Korea Carbon Capture and Sequestration RD Center (KCRC)
- Korea Institute of Geoscience and Mineral Resources (KIGAM)
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A chaotic mixer is developed and optimized in order to overcome challenges associated with mixing polymers with high aspect ratio nano-particulates. The chaotic mixing system utilizes two cylindrical rotors to uniformly mix multi-walled carbon nanotubes (MWCNTs) with a thermoplastic. Results of the electrical conductivity and electromagnetic interference (EMI) shielding effectiveness of the chaotic mixed nanocomposites were higher than ones mixed via a commercial HAAKE mixer. MWCNTs' length was investigated and it was observed that the MWCNTs in chaotic mixed nanocomposites are longer compared to HAAKE mixer. To investigate the effects of MWCNTs' length on the electrical properties, a 3D electrical model based on random walk method was developed and examined. Obtained results suggest that the chaotic mixer has a higher potential for mixing nano particulates into thermoplastics without breaking the nanotubes and improved electrical properties, compared to other types of melt mixing techniques.
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