Singh, B. P. and -, Prabha and Saini , Parveen and Gupta , Tejendra and Garg, Parveen and Kumar, Gaurav and Pande, Indresh and Pande, Shailaja and Seth, R. K. and Dhawan, S. K. and Mathur, R. B. (2011) Designing of multiwalled carbon nanotubes reinforced low density polyethylene nanocomposites for suppression of electromagnetic radiation. Journal of Nanoparticle Research , 13 (12). pp. 7065-7074. ISSN 1388-0764

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Abstract

High aspect ratio multi-walled carbon nanotubes (MWCNTs) reinforced low density polyethylene (LDPE) composites were prepared by solvent casting followed by compression molding technique. Electromagnetic interference (EMI) shielding effectiveness (SE) of these composites was investigated in the frequency range of 12.4–18 GHz (Ku-band) for the first time. The experimental results indicate that the EMI-SE of these composites is sensitive to the MWCNT loading. The average value of EMI-SE reaches 22.4 dB for 10 wt% MWCNT-LDPE composites, indicating the usefulness of this material for EMI shielding in the Ku-band. The main reason for improved SE has been attributed to significant improvement in the electrical conductivity of the composites by 20 orders of magnitude, i.e., from 10−20 for pure LDPE to 0.63 S/cm for MWCNT-LDPE, which is three order of magnitude higher than the previous reports for MWCNT-LDPE composites. Differential scanning calorimetry of the MWCNT-LDPE composites showed around 37% improvement in the crystalline contents over pure LDPE samples which resulted into enhanced thermal stability of the composites. The thermal decomposition temperature of LDPE is shifted by 40 °C on addition of 5 wt% MWCNT. The studies therefore show that these composite can be used as light weight, thermally stable EMI shielding, and antistatic material.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Springer Verlag.
Uncontrolled Keywords:	Multiwalled carbon nanotubes; Low density polyethylene; Electromagnetic interference; Shielding effectiveness
Subjects:	Chemistry Materials Science Nanoscience/ Nanotechnology
Divisions:	UNSPECIFIED
Depositing User:	Mr. Abhishek Yadav
Date Deposited:	22 Nov 2012 11:59
Last Modified:	22 Nov 2012 11:59
URI:	http://npl.csircentral.net/id/eprint/840

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