Do D. Regularities of production of carbon-bearing ultrafine materials from bamboo chips for modification of polymer composites.

The thesis is devoted to the study of physical-chemical regularities of transformation of bamboo chips turning wood shavings of bamboo into nanostructured carbon and silicon carbide particles. First studied the effect of catalytic additives NaCl, NH4Cl, H2O2 on pyrolysis of bamboo. It was found that the catalysts reduce temperatures in processes of pyrolysis and increase the yield of charcoal. The results of studies of physical-chemical processes of transformation of bamboo chips into biomorphic carbon and silicon carbide provide a scientific basis for the development of technology for production of carbon and silicon carbide nanoparticles. In the production of carbon and silicon carbide nanoparticles, the fact of interaction between bamboo pyrolysis products and silicon dioxide to form silicon oxidecarbide was firstly established. Nanostructured silicon carbide is formed by decomposition of silicon oxycarbide at temperatures above 1200 °C and secondary carbothermic reduction reaction of silicon dioxide by carbon released during decomposition of oxycarbide. It was found that in the carbonization at 1200 °C electrical resistivity of graphite-like carbon nanoparticles is in the order of 10-3 Ohm.cm, and It can be used as the conductive filler in the polymer composites. Nanomodification of carbon fiber reinforced epoxy composites by carbon or silicon carbide particles in an amount of 0.5-0.7% leads to increase in bending strength and bending modulus of elasticity of the composite and growth in impact strength on 24-27%.