NDLI: Carbon nanotube grease with enhanced thermal and electrical conductivities

Content Provider	Springer Nature Link
Author	Hong, Haiping Thomas, Dustin Waynick, Andy Yu, Wenhua Smith, Pauline Roy, Walter
Copyright Year	2009
Abstract	A stable and homogeneous grease based on carbon nanotubes (CNTs, single-wall and multi-wall) in polyalphaolefin oil has been produced without using a chemical surfactant. For example, for a 11 wt% (7 vol%) single-wall CNT (diameter 1–2 nm, length 0.5–40 μm) loading, the thermal conductivity (TC) of the grease shows a 60–70% increase compared to that for no nanotube loading. In addition, the grease is electrically conductive, has a high dropping point, good temperature resistance, and does not react with copper at temperatures up to 177 °C. The performance of carbon nanotube grease could be much better with the improvement of nanotube quality and purity. A possible explanation for these results is that of a high loading of CNTs (>10 wt%), they become associated with each other by van der Waals forces in the grease to form three-dimensional percolation networks. Time-dependent magnetic results demonstrate that, even under the influence of a strong outside magnetic field, the TC value remains constant. This phenomenon can be attributed to the existence of networks that makes magnetic alignment of nanotubes impossible.
Starting Page	529
Ending Page	535
Page Count	7
File Format	PDF
ISSN	13880764
Journal	Journal of Nanoparticle Research
Volume Number	12
Issue Number	2
e-ISSN	1572896X
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-11-20
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Grease Carbon nanotube Thermal conductivity Electrical conductivity Synthesis Optics, Optoelectronics, Plasmonics and Optical Devices Physical Chemistry Inorganic Chemistry Characterization and Evaluation of Materials Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Bioengineering Modeling and Simulation

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