Publication:
EVALUATION OF BORON NITRIDE NANOBARB AS THERMAL CONDUCTIVITY ENHANCERS TO CNT COMPOSITES

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Authors
Clark-Johnson, Lauren P.
Subjects
boron nitride nanobarbs
BNNB
boron nitride nanotubes
BNNT
forward looking infrared
FLIR
carbon nanotube
CNT
Advisors
Luhrs, Claudia C.
Date of Issue
2022-09
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
Boron nitride nanobarbs (BNNB) is a new material that is a powder version of Boron nitride nanotubes (BNNT). Studies have shown BNNT to be electrically insulating and thermally conductive. BNNT are difficult to incorporate in composite materials due to their tendencies to agglomerate. BNNBs have a shorter nanostructure, which makes them easier to incorporate in epoxy mixtures. This study examines the thermal conductive properties of BNNB in carbon nanotube (CNT) composites. In this study thermally conductive composites were created using various loadings of BNNB in a 0.5 weight percent CNT-Epoxy mixture. The specimens were tested for electrical conductivity and thermal conductivity using two methods. The electrical conductivity data collected concluded that at higher loadings of BNNB, the percolation limit could be reached. The thermal conductivity data from the forward looking infrared (FLIR) camera were inconclusive due to methodology issues; however, the results from the thermocouple data concluded that an increase in BNNB loading lead to an increase in thermal conductivity at a steady state temperature of 50C.
Type
Thesis
Description
Series/Report No
Department
Mechanical and Aerospace Engineering (MAE)
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Sponsors
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Distribution Statement
Approved for public release. Distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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