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The ability of block copolymers to disperse carbon nanomaterial Taunit is studied using nonionic surfactants: water-soluble poloxamer Р407 and oil-soluble poloxamine (diproxamine-157). According to NMR spectroscopy and surface tension measurements, interaction exists between block copolymer molecules and the surface of multiwalled carbon nanotubes of the Taunit nanomaterial, which prevents their reagglomeration. Possible dispersion mechanisms are analyzed. A good dispersibility of carbon nanomaterials and the stability of dispersions obtained from the aqueous solutions of poloxamers and in the oil medium of poloxamines are demonstrated. [ABSTRACT FROM AUTHOR]

Development and optimization of technologies using nanocomposite materials is one of important areas in modern industrial engineering. In transport industry and in fuel power engineering the use of nanoparticles can optimize fuel consumption, reduce pollutants, and increase aggregate productivity. A special role belongs to carbon nanomaterials, primarily to multi- and single-walled carbon nanotubes, since, beside the improvement of fuel characteristics, they can be completely utilized during combustion. Application of nanoparticles requires the preparing of stable suspensions suitable for various technological processes. In this work by the help of NMR spectroscopy the dispersing of nanomaterial by block copolymers was considered: by poloxamers (P184 and P407) in aqueous medium and by poloxamine (Diproxamine-157) and its mixture with liquid poloxamer P184 in oil medium. Good dispersibility of nanomaterial and stability of aqueous dispersions obtained with the help of poloxamers have been shown. Also, it has been established that pure liquid reverse-sequential poloxamines can be used to create oil-soluble dispersions of nanomaterial. Possible mechanisms to prevent reagglomeration by the help of poloxamines have been considered.