Development of methods for introducing dispersions of multi-walled carbon nanotubes into polymeric and metal matrix

The article discusses the results of studies on the stabilization and introduction of dispersive systems containing multi-walled carbon nanotubes (MWCNTs) into polymer and metal matrices. The statement of the problem is determined by the need to obtain stable dispersed systems with carbon nanotubes (CNT) due to the unique properties of carbon nanoparticles. These tasks are complicated by the strong tendency of carbon nanotubes to agglomerate and the chemical inertness of the surface. To activate the surface of the CNT, physical and chemical methods are used: mechanical and ultrasonic action, treatment with strong chemical oxidants. We used functionalized multi-walled nanotubes with grafted carboxyl and amine groups on the surface. Functionalized MWCNTs, in contrast to the native ones, form more stable disperse systems in solvents (ethanol, monomers) and can be introduced into the polymer (polymethyl methacrylate) and metal matrix (aluminum). Techniques have been developed for introducing MWCNTs into these matrices using ultrasonic treatment, methods of heat treatment, and the method of spark plasma sintering. Polymethylmethacrylate composite with MWCNT can serve as a precursor for transferring MWCNTs from a polymer matrix to a metal one.