Thermal conductivity of tubrostratic carbon nanofiber networks
Composite material systems composed of a matrix of nano materials can achieve combinations of mechanical and thermophysical properties outside the range of traditional systems. While many reports have studied the intrinsic thermal properties of individual carbon fibers, to be useful in applications in which thermal stability is critical, an understanding of heat transport in composite materials is required. In this work, air/ carbon nano fiber networks are studied to elucidate the system parameters influencing thermal transport. Sample thermal properties are measured with varying initial carbon fiber fill fraction, environment pressure, loading pressure, and heat treatment temperature through a bidirectional modification of the 3ω technique. The nanostructures of the individual fibers are characterized with small angle x-ray scattering and Raman spectroscopy providing insight to individual fiber thermal conductivity. Measured thermal conductivity varied from 0.010 W/(m K) to 0.070 W/(m K). An understanding of the intrinsic properties of the individual fibers and the interactions of the two phase composite is used to reconcile low measured thermal conductivities with predictive modeling. This methodology can be more generally applied to a wide range of fiber composite materials and their applications.
- Authors:
-
[1]
; [1]
; [2]
; [3]
; [1]
; [1]
- Univ. of Virginia, Charlottesville, VA (United States)
- Univ. of New Mexico, Albuquerque, NM (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Publication Date:
- Report Number(s):
- SAND-2015-8291J
Journal ID: ISSN 0022-1481; 606317
- Grant/Contract Number:
- AC04-94AL85000; CMMI-1229603
- Type:
- Accepted Manuscript
- Journal Name:
- Journal of Heat Transfer
- Additional Journal Information:
- Journal Volume: 83; Journal Issue: 1; Journal ID: ISSN 0022-1481
- Publisher:
- ASME
- Research Org:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org:
- USDOE National Nuclear Security Administration (NNSA)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 77 NANOSCIENCE AND NANOTECHNOLOGY; carbon nanofiber; thermal conductivity; 3ω technique; small angle x-ray scattering; Raman spectroscopy
- OSTI Identifier:
- 1238589
Bauer, Matthew L., Saltonstall, Chris B., Leseman, Zayd C., Beechem, Thomas E., Hopkins, Patrick E., and Norris, Pamela M.. Thermal conductivity of tubrostratic carbon nanofiber networks. United States: N. p.,
Web. doi:10.1115/1.4032610.
Bauer, Matthew L., Saltonstall, Chris B., Leseman, Zayd C., Beechem, Thomas E., Hopkins, Patrick E., & Norris, Pamela M.. Thermal conductivity of tubrostratic carbon nanofiber networks. United States. doi:10.1115/1.4032610.
Bauer, Matthew L., Saltonstall, Chris B., Leseman, Zayd C., Beechem, Thomas E., Hopkins, Patrick E., and Norris, Pamela M.. 2016.
"Thermal conductivity of tubrostratic carbon nanofiber networks". United States.
doi:10.1115/1.4032610. https://www.osti.gov/servlets/purl/1238589.
@article{osti_1238589,
title = {Thermal conductivity of tubrostratic carbon nanofiber networks},
author = {Bauer, Matthew L. and Saltonstall, Chris B. and Leseman, Zayd C. and Beechem, Thomas E. and Hopkins, Patrick E. and Norris, Pamela M.},
abstractNote = {Composite material systems composed of a matrix of nano materials can achieve combinations of mechanical and thermophysical properties outside the range of traditional systems. While many reports have studied the intrinsic thermal properties of individual carbon fibers, to be useful in applications in which thermal stability is critical, an understanding of heat transport in composite materials is required. In this work, air/ carbon nano fiber networks are studied to elucidate the system parameters influencing thermal transport. Sample thermal properties are measured with varying initial carbon fiber fill fraction, environment pressure, loading pressure, and heat treatment temperature through a bidirectional modification of the 3ω technique. The nanostructures of the individual fibers are characterized with small angle x-ray scattering and Raman spectroscopy providing insight to individual fiber thermal conductivity. Measured thermal conductivity varied from 0.010 W/(m K) to 0.070 W/(m K). An understanding of the intrinsic properties of the individual fibers and the interactions of the two phase composite is used to reconcile low measured thermal conductivities with predictive modeling. This methodology can be more generally applied to a wide range of fiber composite materials and their applications.},
doi = {10.1115/1.4032610},
journal = {Journal of Heat Transfer},
number = 1,
volume = 83,
place = {United States},
year = {2016},
month = {1}
}
- Free Publicly Accessible Full Text
-
Accepted Manuscript (DOE)
- Publisher's Version of Record
- https://doi.org/10.1115/1.4032610