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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:36 |
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Conference: Bucharest University Faculty of Physics 2013 Meeting
Section: Solid State Physics and Materials Science
Title:
Synthesis and characterization of MWCNT composites with applications in aerospace industry
Authors:
C. Berbecaru (1), Adriana Stefan (2), I. Lucian (2), Elena Busuioc (1,2), Stefania Palade (1), Adrian Radu (1), Aida Pantazi (1), Munizer Purica (3), Daniela Dragoman (1)
Affiliation:
(1)University 0f Bucharest, Faculty of Physics,PO BOX MG-11, 077125 Bucharest, Romania
(2)National Institute for Aerospace Research and Development „Elie Carafoli” INCAS –Bucuresti, 061126, Romania
(3)National Institute for Research and Development in IN Microtechnologies, PO BOX 38-160, Bucharest 023573, Romania
E-mail
elena.busuioc66@yahoo.com;apazaida@yahoo.com ; lucian.ion@g.unibuc.ro; berbecaru2ciceron@yahoo.com; danieladragoman@yahoo.com; adriana@incas.ro; adrian.radu@fizica.unibuc.ro; munizerp@imt.ro
Keywords:
dielectric properties, multiwall carbon nanotubes (MWCNT), epoxy resin
Abstract:
Since their discovery in 1991 by Iijima, carbon nanotubes (CNTs) are intensively investigated because of their interesting properties. For instance, CNTs are 100 times stronger than steel and 10 times stronger than carbon fiber, have a thermal conductivity equal to that of diamond, and an electrical conductivity similar to copper, being able however to sustain much higher currents and powerful electron emissions.In addition, composites based on multiwall carbon nanotubes (MWCNT) can be used for various applications. We have prepared such composites with different carbon content (0, 0.5 and 1 % MWCNT mass content) from commercially available MWCNT type LMWNTS 1020 and resin type P401 using the ultrasonic homogenization technique.X-Ray Diffraction measurements in the Bragg-Brentano geometry in the 2 theta range of 5-90 o with a 0.08 pace showed no obvious differences between samples, which indicates good homogenization, while some differences between resin and samples with different MWCNT content were observed in Micro-Raman, in the spectral range of 500 – 4000 cm-1.Compared to pure resin, the resistivity of the samples at room temperature strongly decreases with increasing MWCNT content. Measurements of permittivity and dielectric losses in extended frequency (between 300 Hz and 5x106 Hz) and temperature (between -150 oC and +150 oC) ranges show a continuous decrease of the permittivity and loss for all samples, with reproducible values under room temperature. A strong decrease of the permittivity and losses with frequency increase were observed at different and fixed temperatures for all samples. Our composites display controlled properties with the MWCNT content, which suggest their possible applicability in the aerospace technology.
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