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J Colloid Interface Sci ; 455: 179-87, 2015 Oct 01.
Article in English | MEDLINE | ID: mdl-26070188

ABSTRACT

Here is presented a systematic study of the dispersibility of multiwall carbon nanotubes (MWCNTs) in natural rubber latex (NR-latex) assisted by a series of single-, double-, and triple-sulfosuccinate anionic surfactants containing phenyl ring moieties. Optical polarising microscopy, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and Raman spectroscopy have been performed to obtain the dispersion-level profiles of the MWCNTs in the nanocomposites. Interestingly, a triple-chain, phenyl-containing surfactant, namely sodium 1,5-dioxo-1,5-bis(3-phenylpropoxy)-3-((3-phenylpropoxy)carbonyl) pentane-2-sulfonate (TCPh), has a greater capacity the stabilisation of MWCNTs than a commercially available single-chain sodium dodecylbenzenesulfonate (SDBS) surfactant. TCPh provides significant enhancements in the electrical conductivity of nanocomposites, up to ∼10(-2) S cm(-1), as measured by a four-point probe instrument. These results have allowed compilation of a road map for the design of surfactant architectures capable of providing the homogeneous dispersion of MWCNTs required for the next generation of polymer-carbon-nanotube materials, specifically those used in aerospace technology.


Subject(s)
Alkanesulfonic Acids/chemistry , Latex/chemistry , Nanocomposites/chemistry , Nanotubes, Carbon/chemistry , Succinates/chemistry , Surface-Active Agents/chemistry , Benzenesulfonates/chemistry , Electric Conductivity , Nanocomposites/ultrastructure , Nanotubes, Carbon/ultrastructure , Particle Size , Polymers/chemistry , Surface Properties
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