ИСТИНА

Department of Chemistry, M.V. Lomonosov Moscow State University. Leninskie gory, 1-3, Moscow, Russia, 119992. suspect11@gmail.com Carbon nanotubes (CNTs) have been intensively studied because of their remarkable electronic, mechanical properties and unique one-dimensional (1D) structures. Due to their nanosize features, extraordinary mechanical strength and thermal stability, carbon nanotubes have been considered as ideal candidates to substitute for the conventional alloying components in multifunctional composite steels. One of the emerging applications of CNT is the reinforcement of composites to overcome the performance limit of conventional material. Up to now one of the main approaches to improve mechanical properties of the final composites as well as dispersive properties of carbon materials in coatings is decoration of CNTs by metals or metal oxides. Also such materials are applicable in industrial catalysis and electronic industry. Composite materials with a ceramic or metal matrix provide significant advantages over monolithic ceramics or metals. Recently, metal-matrix composites (MMC) are increasingly used for automotive and aerospace applications because of their high modulus, strength, and thermal stability. There are some ways to prepare coated CNT, e.g. chemical vapor deposition (CVD), sol-gel method or impregnation by metal precursors with its further decomposition. Present work deals with molecular mixing technique (MMT) to achieve this goal. In recent years, molecular mixing technique is widely used because of simplicity (one step method). The flexibility of MMT, in terms of tunable concentrations and access to operating temperatures and reducing agents, enables the synthesis of a variety of nanostructured metal and other materials. The synthetic procedure included reaction of copper salt with reducing agent under the presence of surfactant at 75 – 100oC. As a solvent, water-ethanol mixture was used, due to their low cost; as a source of metal - Cu(NO3)2*3H2O or CuSO4*5H2O and glucose or ascorbic acid – as reducing agents. Nanosized Cu and CNT-composite materials with Cu nanoparticles, obtained by this ways, have been characterized by XRD, SEM and HRTEM. It was found, that their size and morphology of particles immobilized on CNTs depends on all the variable parameters. The size of the Cu particles stabilized on CNT was varied from 20 nm to 100 nm. Next step was preparation bulk composites CNT/Cu by pressing and heating and test their mechanical properties. It was shown that CNT increase the yield strength and Young’s modulus. Pic.1 CNT with cupper particles. The reported study was funded by RFBR according to the research project #16-29-06439