| abstract |
"METHOD FOR THE PRODUCTION OF COMPOUND MATERIALS". The method includes the preparation of the prepreg, its pressing, hardening and carbonization and is characterized in that after the preparation of the prepreg, it is subjected to a heat treatment of between 70 and 1900 degrees C. , is soaked with an inert substance comprising a filler and a polymeric binder in an amount greater than the void volume of the single layer yarn which is calculated by the formula [1], where mnn is a. mass of inert substance, d ~ n ~ is the density of inert substance, a is the length of the prepreg, b is the width of the prepreg, h is the thickness of the prepreg, m ~ pr ~ is the mass of the prepreg and, d-fib ~ is the density of the fiber, and is heated to between 160Â ° C and 200Â ° C and a pressure of between 1 and 5 MPa is simultaneously applied. The method is useful for manufacturing composite materials with a matrix containing carbon and variable porosity, for example fuel cell current collectors with aggregate electrodes, porous electrochemical electrodes or filter elements. |