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| Naji, M. |
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| Motta, Antonella |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Petrov, R. H. | Madrid |
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| Kočí, Jan | Prague |
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| Azam, Siraj |
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| Ali, M. A. |
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| Rančić, M. |
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| Azevedo, Nuno Monteiro |
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Kurkowska, Milena
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Publications (3/3 displayed)
- 2018Application of electroless deposition for surface modification of the multiwall carbon nanotubescitations
- 2017Effect of Carbon Nanotubes Deposition with Metallic Coatings on Electrical Conductivity of Epoxy Based Nanocomposites
- 2014Electroless deposition of Ni-P/nano SiO2 composite coatings on PET and carbon fibre substrates
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article
Effect of Carbon Nanotubes Deposition with Metallic Coatings on Electrical Conductivity of Epoxy Based Nanocomposites
Abstract
The paper describes composites of epoxy resin doped with carbon nanotubes unmodified and modified with Ni-P, Ni-B, Co-B and Fe-B coatings. Three types of carbon nanotubes were studied: two from Belgian company Nanocyl(NC3100 and NC700) and one from Korean company CNT Co. LTD (CTubes100). Surface modification was carried out using electroless deposition. Two types of reducing agents, i.e. sodium hypophosphite (NaH2PO2) and sodium tetrahydroborate (NaBH4) were applied. As the matrix two types of epoxy resin, i.e. Epon 862 and Epidian 52 were used. Epoxy resins differed in viscosity. Viscosity of Epon 862 is between 2500-4500 mPas, while Epidian 52 has viscosity, equal to 400-800 mPas. As a curing agent TETA (Triethylenetetramine) was used in both cases. The nanotubes were pretreated in a mixture of acids (nitric and sulfuric acid). Preparation of CNT surface before electroless deposition consisted of sensitization (SnCl2/HCl) and activation (PdCl2/HCl). During the preparation and the electroless deposition of the carbon nanotubes was used ultrasonic mixing. Homogenization of the matrix with carbon nanotubes was carried out by calendaring. Unmodified MWCNT were tested using TGA method (TA Instruments Q500). Multiwall carbon nanotubes with Ni-P coating were examined with SEM (Hitachi S5500 SEM/STEM). Electrical conductivity of nanocomposites was tested using Keithley’u 6221/2182A device. These studies were aimed to investigate the effect of carbon nanotubes modification with different alloy coatings on electrical conductivity of composite materials. The results were compared to nanocomposites doped with the same carbon nanotubes before the modification.