The effect of a convection vortex on sock formation in the floating catalyst method for carbon nanotube synthesis.

Details

• Personal Author:
  Hou G ; Lashmore D ; Li W ; Liu Y ; Mast D ; Ng V ; Schulz M ; Shanov V ; Song Y ; Su R ; Sundaram M ; Wang A ; Zhang L
• Description:
  The formation of an aerogel-like sock is important to the floating catalyst method of synthesizing carbon nanotubes (CNTs). The sock, a term coined by Alan Windle, is an assembly of the individual electrostatically assembled nanotubes synthesized in the reactor. The coherency of this sock helps form the yarn or sheet. In this study, sock formation is investigated by controlling the feedstock type, injection rate, and carrier gas flow rate. A convection vortex has been identified, possibly for the first time, in the floating catalyst method. A convection vortex model is proposed to explain the sock formation. The sock morphology is found to be strongly affected by the carrier gas flowrate, where too high gas flowrate reduces the concentration of CNTs in the reactor resulting a failure in the sock formation. The dynamic behavior of the sock is explained by a web-shell structure. [Description provided by NIOSH]
• Subjects:
  Occupational Health Safety
• Keywords:
  Carbon nanotubes; CNT; Nanomaterials; Nanostructures; Synthetic materials
• ISSN:
  0008-6223
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Minnesota ; New Hampshire ; Ohio ; OSHA Region 1 ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  102
• NIOSHTIC Number:
  nn:20064885
• Citation:
  Carbon 2016 Jun; 102:513-519
• Contact Point Address:
  Guangfeng Hou, Department of Mechanical and Materials Engineering, University of Cincinnati, OH 45221, United States
• Email:
  hougg@mail.uc.edu
• CAS Registry Number:
  Carbon nanotubes (CAS RN 308068-56-6)
• Federal Fiscal Year:
  2016
• Performing Organization:
  University of Cincinnati
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Carbon
• End Date:
  20260630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:8e15f3cdb7cc99b490ec7d308270886725c06d541720744ebbfdcb6ce572e1af973b87a5d840b3d86b7e32ec11b02023466b481c6ce49c000eb3885c958d74f4
• Download URL:
  https://stacks.cdc.gov/view/cdc/249264/cdc_249264_DS1.pdf
• File Type:
  [PDF - 1.90 MB ]