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Volume 4
Nano Research & Applications
ISSN: 2471-9838
Notes:
JOINT EVENT
October 04-05, 2018 Moscow, Russia
&
2
nd
Edition of International Conference on
26
th
International Conference on
Advanced Nanotechnology
Materials Technology and Manufacturing Innovations
Advanced Nanotechnology 2018
& Materials-Manufacturing 2018
October 04-05, 2018
Page 13
Masaru Matsuo
Dalian University of Technology, China
Masaru Matsuo, Nano Res Appl 2018, Volume 4
DOI: 10.21767/2471-9838-C5-019
Mechanical and electric properties of nanofiber - polymer composites under different electric
fields
U
nder external vibration, the damage of polymer-filler composites by Joule heat associated with tunneling current is
thought to be serious than that by hot air. To elucidate it, the storage modulus for polyethylene (PE)-nickel coated
carbon fiber (NiCF) composites and that for aromatic polyimide (PI)-vapor grown carbon fiber (VGCF) composites
were measured as a function of frequency by the two heating methods. In common, the storage modulus of PE-NiCF
decreased with increasing temperature and this tendency was considerable with decreasing frequency. However, the
relative decrease of the modulus by Joule heat was more remarkable than that by hot air. This was due to the fact that
the sample damage by Joule heat is associated with an increase in electron transfer in PE matrix at elevated temperature.
Probably, it was postulated that electron transfer by tunneling effect between NiCFs caused partial discharge on PE
surface and allowed appearance of pits and electron treeing, and finally the growth of the treeing wreaked electron
breakdown. Such sample damage indicated that the electric field must be controlled to use as PTC materials like floor
heating in winter season. In comparison with PE-NiCF, frequency dependence of the storage modulus for the PI-VGCF
composite was not considerable against elevated temperature by Joule heat because of high heat resistance of rigid
PI chains. Actually, the distance between adjacent VGCFs was independence of electric field because of no thermal
expansion of PI. The phenomenon was analyzed in terms of theoretical calculation for thermal fluctuation-induced
tunneling effect. The approach indicated that the increase in current is attributed to an increase in electron transfer area
on VGCF surface and is independent of the distance between adjacent VGCFs.
Biography
Masaru Matsuo has completed his PhD at Kyoto University in Japan and he was a professor of Nara Women’s University. After his retirement, he became
a full time professor of Dalian University of Technology in China. Since September 1
st
2014, he is a visiting professor of Dalian University of Technology. He
has published more than 200 papers in refereed journal articles. He is IUPAC fellow and “Certificate of Membership Award of ACS (July 2015~ July 2018).
He received “Award of Society of Fiber Science and Technology of Japan on May 1990, “Paul Flory Polymer Research Prize” on April 2010 and “Certificate
of friendship Award of Liaoning Province in China” on September 2011.
mm-matsuo@live.jp