Julia A. King

Julia A. King

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Professor, Chemical Engineering

  • PhD, Mechanical Engineering, University of Wyoming
  • MS, Chemical Engineering, University of Wyoming
  • BS, Chemical Engineering, Purdue University

Biography

My research interests are in the area of composite materials. Specifically, my interests often focus on adding various carbon fillers to typically thermoplastic polymers to produce electrically and thermally conductive resins.

Increasing the thermal and electrical conductivities of typically insulating polymers, such as polyethylene terephthalate (PET) and nylon, has the potential of greatly increasing the market for these materials. A thermally conductive material is useful as a heat sink in applications such as lighting ballasts and transformer housings. An electrically conductive material can be used in static dissipative, slightly electrically conductive (e.g., fuel gages, etc.), or EMI (Electromagnetic Interference)/RFI (Radio Frequency Interference) shielding applications (computer and cellular phone housings, etc).

One approach to improving the thermal and electrical conductivities is through the addition of a conductive filler material. For example, adding synthetic graphite particles to nylon 6,6 increases the thermal conductivity from approximately 0.3 W/mK to 1.8 W/mK and decreases the electrical resistivity from approximately 1015 ohm-cm to 20 ohm-cm. Another application for  thermally and electrically conductive resins is for a bipolar plate for a fuel cell.

For more information see Dr. King’s website at: http://www.chem.mtu.edu/org/ctc/

Research Interests

  • Thermally and electrically conductive resins/composites

Publications

  • J. A. King, D. Lopez Gaxiola, B. A. Johnson, and J. M. Keith, “Thermal Conductivity of Carbon Filled Polypropylene Based Resins", Journal of Composite Materials, Vol. 44, No. 7, pp. 839-855, April 2010
  • J. A. King, M. D. Via, J. M. Keith, and F. A. Morrison, “Effects of Carbon Fillers on Rheology of Polyproylene Based Resins”, Journal of Composite Materials, Vol. 43, No. 25, pp. 3073-3089, December 2009.
  • J.A. King, B.A. Johnson, M.D. Via, and C.J. Ciarkowski, "Electrical Conductivity Modeling of Carbon-Filled Polypropylene Based Resins", Journal of Applied Polymer Science, Vol. 112, No. 1, pp. 425-433, April 2009
  • R. A. Hauser, J. A. King, R. M. Pagel, and J. M. Keith, “Effects of Carbon Filler on the Thermal Conductivity of Highly Filed Liquid Crystal Polymer Based Resins”, Journal of Applied Polymer Science, Vol. 109, No. 4, pp. 2145-2155, August 2008
  • J. A. King, R. L. Barton, R. A. Hauser, and J M Keith “Synergistic Effects of Carbon Fillers in Electrically and Thermally Conductive Liquid Crystal Polymer Based Resins”, Polymer Composites, Vol. 29, No. 4, pp. 421-428, April 2008.