nanostructured material; nanocomposite; carbon nanotube; green technology; supercritical carbon dioxide
Abstract :
[en] Nanocomposites of polycaprolactone (PCL) filled with multi-walled carbon nanotubes (MWNTs) were foamed by supercritical CO2 in order to prepare materials with reduced electromagnetic interference (EMI). Two mixing techniques were used, i.e., melt blending and co-precipitation. Shielding efficiency as high as 60 to 80 dB together with a low reflectivity was observed at a very low vol% of MWNTs (0.25 vol%). The reflectivity of the nanocomposites was advantageously decreased upon foaming. The uniformity of the open-cell structure was assessed by scanning electron microscopy. These foamed PCL/MWNT nanocomposites are very promising EMI shielding materials because their performances result from absorption at low filler content and not from reflection at relatively high filler content as was previously the case.
Research center :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Chemistry Materials science & engineering
Author, co-author :
Thomassin, Jean-Michel ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Pagnoulle, Christophe; Physiol SA, Liège, Belgium
Bednarz, Lukasz; The Catholic University of Louvain (UCL) > Microwave Laboratory
Huynen, Isabelle; The Catholic University of Louvain (UCL) > Microwave Laboratory
Jérôme, Robert ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Detrembleur, Christophe ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
Foams of polycaprolactone/MWNT nanocomposites for efficient EMI reduction
Publication date :
2008
Journal title :
Journal of Materials Chemistry
ISSN :
0959-9428
eISSN :
1364-5501
Publisher :
Royal Society Chemistry, Cambridge, United Kingdom
The ‘‘Région Wallonne’’ in the frame of the ‘‘Nanotechnologies’’ program ENABLE BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
H. C. Lee, J. Y. Kim, C. H. Noh, K. Y. Song and S. H. Cho, Appl. Surf. Sci., 2006 252(8), 2665.
M. Stefecka, M. Kando, H. Matsuo, Y. Nakashima, M. Koyanagi, T. Kamiya and M. Cernak, J. Mater. Sci., 2004 39, 2215.
S. Vulpe, F. Nastase, C. Nastase and I. Stamatin, Thin Solid Films, 2006 495(1-2), 113.
N. C. Das, D. Khastgir, T. K. Chaki and A. Chakraborty, Composites, Part A, 2000 31(10), 1069-1081.
Chiang Wen-Yen and Cheng Kai-Yuan, Polym. Compos., 1997 18(6), 748.
Y. Yang, M. C. Gupta, K. L. Dudley and R. W. Lawrence, J. Nanosci. Nanotechnol., 2005 5(6), 927-931.
S. Y. Yang, C. Y. Chen and S. H. Parng, Polym. Compos., 2002 23(6), 1003-1013.
N. C. Das, D. Khastgir, T. K. Chaki and A. Chakraborty, J. Elastomers Plast., 2002 34(3), 199-223.
N. C. Das, T. K. Chaki, D. Khastgir and A. Chakraborty, Adv. Polym. Technol., 2001, 20(3), 226-236.
J. M. Thomassin, X. Lou, C. Pagnoulle, S. Aimad, L. Bednarz, I. Huynen, R. Jérôme and C. Detrembleur, Multi-walled carbon nanotubes/poly(ε-caprolactone) nanocomposites with exceptional EMI shielding properties, J. Phys. Chem. C, 2007, 111(30), 11186-11192.
Y. Yang, M. C. Gupta, K. L. Dudley and R. W. Lawrence, Nano Lett., 2005 5(11), 2131-2134.
Y. Yang, M. C. Gupta, K. L. Dudley and R. W. Lawrence, Adv. Mater., 2005, 17, 1999.
I. Huynen, C. Steukers and F. Duhamel, IEEE Trans. Instr. Meas., 2001, 50, 1343-1348.
X. Cao, L. J. Lee, T. Widya and C. Macosko, Polymer, 2005, 46, 775.
A. Saib, L. Bednarz, R. Daussin, C. Bailly, X. Lou, J.-M. Thomassin, C. Pagnoulle, C. Detrembleur, R. Jerome and I. Huynen, IEEE Trans. Microwave Theory Tech., 2006, 54, 2745-2754.
K. Donald and R. J. White, A handbook on electromagnetic shielding materials and performances, Library of Congress, USA, 1975.
A. N. Lagarkov and A. K. Sarychev, Phys. Rev. B, 1996, 53, 6318-6336.
