Journal
ACS NANO
Volume 5, Issue 6, Pages 4850-4857Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn2008645
Keywords
carbon nanotubes; chemical vapor deposition; efficiency; manufacturing; composites
Categories
Funding
- National Science Foundation [CMMI-0800213, DMR-0819762]
- Airbus S.A.S.
- Boeing
- Embraer
- Lockheed Martin
- Saab AB
- Spirit AeroSystems
- Textron Inc.
- Composite Systems Technology
- Hexcel
- TohoTenax through MIT's Nano-Engineered Composite aerospace STructures (NECST) Consortium
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [819762] Funding Source: National Science Foundation
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Vertically aligned carbon nanotubes (VACNTs) have certain advantages over bulk CNT powders and randomly oriented CNT mats for applications in flexible electronic devices, filtration membranes, biosensors and multifunctional aerospace materials. Here, a machine and a process to synthesize VACNTs in a continuous manner are presented showing uniform growth on 2D and 3D substrates, including alumina fibers, silicon wafer pieces, and stainless steel foils. Aligned multiwalled carbon nanotubes (MWNT) are synthesized at substrate feed rates of up to 6.8 cm/min, and the CNTs reach up to 60 mu m in length depending on residence time in the reactor. In addition to the aligned morphology indicative of high yield growth, transmission electron microscopy and Raman spectroscopy reveal that the CNTs are of comparable quality to CNTs grown via a similar batch process. A significant reduction in time, reaction products, gases, and energy is demonstrated relative to batch processing, paving the way for industrial production of VACNTs.
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