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A simple novel method for preparing multiwalled carbon nanotubes/montmorillonite (MWNTs/MMT) hybrids has been established through mixing pristine MWNTs in MMT aqueous dispersion. The principle of this method is based on the formation of stable dispersion containing both MWNTs and MMT in water, which results from strong interaction between MWNTs and MMT platelets. Sedimentation experiments, measurements of ζ potential, and Raman spectra have been used to confirm the presence of strong interaction between MWNTs and MMT sheets. The morphology observation for the dried MWNTs/MMT hybrids shows that the obtained hybrids are homogeneous, in which MWNTs exist as the state of single nanotubes that are absorbed on the surface and edge of MMT sheets. In addition, poly(ethylene oxide) (PEO) nanocomposites containing both MWNTs and MMTs are prepared by using this method. An obvious synergistic effect of MMT sheets and MWNTs in improving mechanical properties of PEO matrix has been observed.
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Wang et al. (2009) studied this question.
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