Synthesis of a composite material based on coal mining waste using wave chemistry methods

Abstract

Studies for developing composite materials based on coal waste in combination with coal and polymer raw materials under the influence of ultrasound have been carried out within the framework of creating effective and environmentally friendly technologies for the deep processing of coal waste and the production of new valuable import-substituting chemical products for various purposes. Burned rocks (BR) are used as a filler in the composite material that is a product of oxidative self-firing of waste rock extracted along with coal to the surface. Sodium humate (HNa) obtained by alkaline extraction from oxidized coals from the Shubarkol deposit was used as a modifier. A polymer was introduced into the matrix to increase the chemical resistance and increase the life cycle of the composite material. Polystyrene was used as a polymer in the matrix of the composite material. The choice of polystyrene is due to its widespread application in construction, medicine, and food industry as well as its ease of processing. It is distinguished by high rigidity, hardness and excellent transparency values. Composite material was obtained by the traditional method of impregnation using ultrasonic exposure. By varying the composition of the matrix and the filler, a composite material was obtained properties of which were quantitatively and qualitatively different from the properties of each of its components. The X-ray phase composition of new composite materials was studied on a DRON-2.0 diffractometer using Co(Kα) radiation. Microscopic analysis was performed using a scanning electron microscope to study the surface morphology of the synthesized composite. The resulting composite can be used as a building material.