Full Paper Comparative study of the influence of carbon nanotubes and graphene nanoplatelets on dielectric and microwave properties of conductive rubber composites Omar A.Al-Hartomy 1,2 , Ahmed A.Al-Ghamdi 1 , Nikolay Dishovsky 3, *, Rossitsa Shtarkova 4 , Vladimir Iliev 5 , Farid El-Tantawy 6 1 Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, (SAUDI ARABIA) 2 Department of Physics, Faculty of Science, University of Tabuk, Tabuk 71491, (SAUDI ARABIA) 3 Department of Polymer Engineering, University of Chemical Technology and Metallurgy, 8 Kl. Ohridski blvd., 1756 Sofia, (BULGARIA) 4 Department of Chemistry, Technical University, 8 Kl. Ohridski blvd., 1000 Sofia, (BULGARIA) 5 College of Telecommunications and Posts, Sofia, (BULGARIA) 6 Department of Physics, Faculty of Science, Suez Canal University, Ismailia, (EGYPT) E-mail : [email protected] INTRODUCTION Conductive polymer composites can be obtained by the combination of an insulating polymer matrix with electrically conductive fillers [110] . Among these conduc- tive fillers, carbon-based materials such as carbon black (CB) [1113] , carbon nanotubes (CNTs) [5,1422] , and graphene nanoplatelets (GNPs) [2,3,7,2326] , have been studied extensively. In particular, significant property enhancements were reported, when carbon nanofillers Rubber composites; Carbon nanotubes; Graphene nanoplatelets; Dielectric and microwave properties. KEYWORDS ABSTRACT In this study the effect of carbon nanotubes (CNT) and graphene nanoplatelets (GNP) at various weight ratios on the dielectric (dielectric permittivity, dielectric loss angle tangent) and microwave (reflection coeffi- cient, attenuation coefficient, shielding effectiveness) properties of con- ductive nanocomposites on the basis of natural rubber containing a con- stant amount of standard furnace carbon black has been investigated in the wide frequency range (1-12 GHz). Some additional investigations on the morphology and microstructure of the graphene particles, carbon nanotubes and furnace carbon black used have been carried out by trans- mission electron microscopy (TEM) and selected area electron diffraction (SAED). 2012 Trade Science Inc. - INDIA Polymer Research & Reviews In Trade Science Inc. RRPL, 3(3), 2012 [107-116] Volume 3 Issue 3 ISSN : 2249 - 8877 were incorporated into natural or synthetic elastomers [27- 31] . The reason for the interest in the above mentioned carbon nanostructures and their influence can be ex- plained as follows: carbon is a versatile element. Car- bon atoms are capable of bonding with other atoms in sp, sp 2 , and sp 3 hybridized structures, generating nu- merous stable molecules [32] . Thus, carbon has a num- ber of distinct molecular or crystalline forms termed al- lotropes or polymorphs, which include graphite, dia- mond, and the more recently discovered fullerenes and
Comparative study of the influence of carbon nanotubes and graphene nanoplatelets on dielectric and microwave properties of conductive rubber composites
May 19, 2023
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