EFFECT OF MODIFICATION OF CARBON FIBER SUFACE ON THE PHYSICAL AND MECHANICAL CHARACTERISTICS OF CARBON FIBER PLASTICS

Abstract

Improving the physical and mechanical properties of composite materials by modi­fying the filler surface is one of the urgent tasks in the field of materials science. In this paper, studies of the effect of modification of the carbon fiber surface on the strength properties of carbon fiber are carried out. At the first stage of the study, the optimal carbon fiber surface modifier was selected. It is shown that the best strength characteristics were observed when testing fibers whose surface was treated with acetone and microplastics based on them. After determining the modifier, the second stage of research was carried out. It was necessary to determine how much the strength properties of the modified carbon fiber would increase compared to the unmodified one. Modified and unmodified carbon fiber samples were tested for tensile and three-point bending. As a result of the tests, it was revealed that the tensile strength of the modified carbon fiber increased by 2.2 times, and the bending strength increased by 1.5 times. On this basis, it can be noted that the activation of the carbon fiber surface increases the adhesion of the filler to the binder in carbon fiber, which leads to a significant increase in its strength characteristics.