Thermal conductivity of tubrostratic carbon nanofiber networks

Bauer, Matthew L.; Saltonstall, Chris B.; Leseman, Zayd C.; Beechem, Thomas E.; Hopkins, Patrick E.; Norris, Pamela M.

doi:10.1115/1.4032610

Title: Thermal conductivity of tubrostratic carbon nanofiber networks

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Abstract

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:

Bauer, Matthew L. ^[1]; Saltonstall, Chris B. ^[1]; Leseman, Zayd C. ^[2]; Beechem, Thomas E. ^[3]; Hopkins, Patrick E. ^[1]; Norris, Pamela M. ^[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:: 2016-01-01

Research Org.:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1238589

Report Number(s):: SAND-2015-8291J
Journal ID: ISSN 0022-1481; 606317

Grant/Contract Number:: AC04-94AL85000; CMMI-1229603

Resource 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

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

Citation Formats


                    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., 2016. 
Web.  https://doi.org/10.1115/1.4032610.

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                    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.  https://doi.org/10.1115/1.4032610

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                    Bauer, Matthew L., Saltonstall, Chris B., Leseman, Zayd C., Beechem, Thomas E., Hopkins, Patrick E., and Norris, Pamela M.. Fri .  
"Thermal conductivity of tubrostratic carbon nanofiber networks".  United States.  https://doi.org/10.1115/1.4032610.  https://www.osti.gov/servlets/purl/1238589.

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@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}

}

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