Investigation of the peculiarities of modification of carbon sorbent by lactic and glycolic acid with their subsequent polycondensation

A method of modification of carbon sorbents by copolymers of glycolic and lactic acids is developed. Control over the polycondensation process and adjustment of the synthesis conditions and parameters are done using the methods of NMR spectroscopy and thermogravimetric analysis. Optimal conditions for the modification of a carbon material are selected, allowing one to obtain predominantly the oligomers of glycolic and lactic acids. The surface shape and morphology, porous structure, elemental composition and composition of the functional groups, and mechanical strength of the carbon sorbent samples are investigated using a set of physicochemical methods. It is established that the adjusted conditions of polycondensation allow one to affix the modifying agent on the carbon sorbent.