Rohini, Rani and Lasitha, K and Bose, Suryasarathi (2016) Epoxy composites containing cobalt(II)-porphine anchored multiwalled carbon nanotubes as thin electromagnetic interference shields, adhesives and coatings. In: JOURNAL OF MATERIALS CHEMISTRY C, 4 (2). pp. 352-361.
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Abstract
Herein a facile strategy has been adopted to design epoxy based adhesive/coating materials that can shield electromagnetic radiation. Multiwalled carbon nanotubes (MWNTs) were non-covalently modified with an ionic liquid and 5,10,15,20-tetrakis(4-methoxyphenyl)-21H,23H-porphine cobalt(II) (Co-TPP). The dispersion state of modified MWNTs in the composites was assessed using a scanning electron microscope. The electrical conductivity of the composites was improved with the addition of IL and Co-TPP. The shielding effectiveness was studied as a function of thickness and intriguingly, composites with as thin as 0.5 mm thickness were observed to reflect 497% of the incoming radiation. Carbon fibre reinforced polymer substrates were used to demonstrate the adhesive properties of the designed epoxy composites. Although, the shielding effectiveness of epoxy/MWNT composites with or without IL and Co-TPP is nearly the same for 0.5 mm thick samples, the lap shear test under tensile loading revealed an extraordinary adhesive bond strength for the epoxy/IL-MWNT/Co-TPP composites in contrast to neat epoxy. For instance, the lap shear strength of epoxy/IL-MWNT/Co-TPP composites was enhanced by 100% as compared to neat epoxy. Furthermore, the composites were thermally stable for practical utility in electronic applications as inferred from thermogravimetric analysis.
Item Type: | Journal Article |
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Publication: | JOURNAL OF MATERIALS CHEMISTRY C |
Publisher: | ROYAL SOC CHEMISTRY |
Additional Information: | Copy right for this article belongs to the SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA |
Department/Centre: | Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) |
Date Deposited: | 28 Jan 2016 06:07 |
Last Modified: | 28 Jan 2016 06:07 |
URI: | http://eprints.iisc.ac.in/id/eprint/53173 |
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