Abstract
We have investigated the structural, electrical and mechanical properties of multi-walledcarbon nanotube (MWNT)–polyethylene oxide (PEO) composites. Composites withdifferent wt% (between 0 and 50 wt% of MWNTs) were prepared and characterized by thescanning electron microscopic technique. Enhanced electrical conductivity and mechanicalstrength were observed for the MWNT–PEO composites. The conductivity measurementson the MWNT–PEO composite films with highest concentration of MWNTs(∼50 wt%) showed anincrease of eight orders (∼7.5 × 10−8 to 6.52 S cm−1)of magnitude in conductivity from bare PEO film. The temperature dependence of the conductivity forMWNT (∼50 wt%)–PEO composite showed predominantly semiconductingbehaviour. The elastic modulus and tensile strength of an MWNT(∼50 wt%)–PEO film were increased by about five- and tenfold respectively, as compared to thecorresponding values for a PEO film.
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