INFLUENCE OF COHERENT RADIATION ON THE STRENGTH OF ARAMID FIBERS AND TISSUES

doi: 10.25712/ASTU.2072-8921.2021.02.033

Abstract

The paper investigates the effect of coherent laser radiation on the properties of the surface and a thin surface layer of aramid fibers and fabrics. An experimental evaluation of the capillarity and wettability of fibers and fabrics made of high-strength synthetic materials pretreated in the field of laser radiation with a power of 300 mW and 500 mW, with wavelengths of 532 nm and 410 nm, respectively, is carried out. The effective time of irradiation and the duration of the effect are also determined, after which the change in the elastic-strength characteristics of the material is investigated. As a result of the work, it was found that irradiation leads to an improvement in the adhesion capacity and hydrophilization of the surface, while the elastic-strength characteristics of the material do not change, but, possibly, improve. On the basis of the studies carried out, a method of photoactivation of the aramid fiber surface using coherent low-power laser radiation is proposed. The relevance of the work lies in the search for a new method and the development of a technique for modifying aramid fabrics that does not lead to the loss of material properties, with a visible improvement in others.