Authors Das, A. ; Stöckelhuber, K.W. ; Jurk, R. ; Fritzsche, J. ; Klüppel, M. ; Heinrich, G.
Title Coupling activity of ionic liquids between diene elastomers and multi-walled carbon nanotubes
Date 14.09.2009
Number 19963
Abstract In order to ensure better rubber/multi-walled carbon nanotube (MWCNT) compatibility and to enhance the dispersibility, a series of ionic liquids has been tested in regard to an improved interaction between rubber and carbon nanotubes. We found that in the presence of especially one ionic liquid, namely, 1-allyl-3-methyl imidazolium chloride, for the blend of solution-styrene-butadiene and polybutadiene rubber, used as basic elastomer, a three fold increase of tensile strength was achieved with only not, vert, similar3 wt.% MWCNT loading. At this low concentration of MWCNTs the sample can be stretched up to 456% without mechanical failure. The use of this ionic liquid additionally results in higher electrical conductivity (10-2 S cm-1) at low concentration (<3 wt.%) of MWCNTs. Dynamic mechanical analysis confirmed the specific interaction of CNTs and diene rubber chains by showing an extra relaxation process at relatively higher temperature (not, vert, similarTg + 130 K) in the temperature sweep measurements. Raman spectroscopic analysis also supported the specific interaction between MWCNTs and rubber molecules with the help of 1-allyl-3-methyl imidazolium chloride. Transmission electron microscopic images confirm the good dispersion of the MWCNTs along with a ‘cellular’-like structure of the CNTs in the rubber matrix.
Publisher Carbon
Citation Carbon 47 (2009) 3312-3321

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