TY - JOUR
T1 - Experimentally measured thermal transport properties of aluminum-polytetrafluoroethylene nanocomposites with graphene and carbon nanotube additives
AU - Kappagantula, Keerti
AU - Pantoya, Michelle L.
N1 - Funding Information:
The authors are grateful for the support of the Army Research Office under contract number W911NF-11-1-0439 and the encouragement of our program manager, Dr. Ralph Anthenien. Also, Mr. Eric Nixon is gratefully acknowledged for helpful LFA discussions.
PY - 2012/1/31
Y1 - 2012/1/31
N2 - Reactive materials such as aluminum (Al) and polytetrafluoroethylene (Teflon) are used for energy generation applications and specifically in ordnance technologies. With the advent of nanotechnology various nano-scale additives have become incorporated into reactive material formulations with the hope of enhanced performance. An important component to the study of energy generation is an examination of energy transport through a reactant matrix. This study examines an experimental approach to quantifying thermal properties of an Al/Teflon nanocomposite reactant matrix that has been impregnated with carbon additives. Various structures of carbon are investigated and include amorphous nanoscale carbon spheres (nano C), graphene flakes and unaligned multiwalled carbon nanotubes (CNTs). The additives were selected based on their completely different structures with the hypothesis that the structure of the additive will influence the thermal transport properties of the matrix. Results show graphene has the greatest influence on the thermophysical properties. For example, thermal conductivity of the composites containing graphene increased by 98%. Graphene similarly enhanced the thermal diffusivity and specific heat of the Al/Teflon matrix. Conversely, nano C and CNTs decreased the thermal conductivity and thermal diffusivity of the samples significantly.
AB - Reactive materials such as aluminum (Al) and polytetrafluoroethylene (Teflon) are used for energy generation applications and specifically in ordnance technologies. With the advent of nanotechnology various nano-scale additives have become incorporated into reactive material formulations with the hope of enhanced performance. An important component to the study of energy generation is an examination of energy transport through a reactant matrix. This study examines an experimental approach to quantifying thermal properties of an Al/Teflon nanocomposite reactant matrix that has been impregnated with carbon additives. Various structures of carbon are investigated and include amorphous nanoscale carbon spheres (nano C), graphene flakes and unaligned multiwalled carbon nanotubes (CNTs). The additives were selected based on their completely different structures with the hypothesis that the structure of the additive will influence the thermal transport properties of the matrix. Results show graphene has the greatest influence on the thermophysical properties. For example, thermal conductivity of the composites containing graphene increased by 98%. Graphene similarly enhanced the thermal diffusivity and specific heat of the Al/Teflon matrix. Conversely, nano C and CNTs decreased the thermal conductivity and thermal diffusivity of the samples significantly.
KW - Aluminum
KW - Energetic nanocomposites
KW - Graphene
KW - Laser flash analysis
KW - Reactive materials
KW - Thermal properties
UR - http://www.scopus.com/inward/record.url?scp=82955195714&partnerID=8YFLogxK
U2 - 10.1016/j.ijheatmasstransfer.2011.10.026
DO - 10.1016/j.ijheatmasstransfer.2011.10.026
M3 - Article
AN - SCOPUS:82955195714
SN - 0017-9310
VL - 55
SP - 817
EP - 824
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
IS - 4
ER -