年間 4 号発行
ISSN 印刷: 2572-4258
ISSN オンライン: 2572-4266
Indexed in
OBTAINING NANODISPERSED GRAPHITE PREPARATION FOR COATING ULTRATHIN MINERAL FIBERS
要約
An efficient process of milling and activation of highly dispersed graphite with the use of the energy of ultrasonic vibrations in the mode of acoustic cavitation in the presence of ammonia, hydrogen peroxide, and iodine has been developed. As a result, the lamellar structure of graphite is split with subsequent deposition of the laminated form of graphite from this dispersion onto the surface of glass, quartz, and aluminum–borosilicate fibers by attraction forces originating between the graphite surface, activated in an alkaline medium, and the glass. This technical solution ensures obtaining and recovering (after the aging of dispersions in aqueous and aqueous-alcoholic solutions) alkali-activated nanosized graphite particles. Ultrasonic treatment improves the properties of dispersions, often called activated colloidal-graphite preparations (CGP). The CGP treated according to the proposed regime, increase the electric conductivity and thermal-shock stability of composite fibers. CGP-coated quartz, aluminum–borosilicate, and basalt fibers can be used for fabrication of volumetric, thermally stable, wide-range, radioabsorbing materials for telecommunication systems of aviation, rocket, and space modules.