Bulletin of
Vitebsk State
Technological
University

ABSTRACT

Enhancing the adhesive properties of polyacrylonitrile (PAN) fibers is a significant research and development topic in materials and technology. The adhesive properties of PAN fibers, namely, their ability to adhere to other materials or matrices, play a key role in the production of various composite materials, fiber composites, and carbon fiber products. Enhancement of the adhesive properties of PAN fibers can pose the following challenges: PAN fibers are chemically inert and difficult to form adhesive bonds with other materials. This makes it difficult to glue, stitch, or join with other materials. PAN fibers contain a limited number of active functional groups that can participate in chemical reactions with other materials, thereby reducing adhesion. PAN fibers have a smooth and non-porous surface, which also complicates adherence to other surfaces. The low surface energy of PAN implies that the molecules do not have a high affinity for other materials. In this context, the article addresses the pressing issue of enhancing the adhesive properties of PAN fibers through the use of low-pressure radiofrequency capacitive (RFC) plasma, which facilitates the creation of additional active groups on their surface. Active groups on the surface of the fibers can interact with other materials, such as resins, adhesives, or coatings, enhancing adhesion and creating more reliable connections. The article presents the results of a study of the influence of low-pressure high-frequency capacitive plasma on the adhesive properties of PAN fibers. The results of the adhesive strength and capillarity of PAN fibers after pre-treatment with low pressure plasma are discussed.

Enhancing the Adhesion Properties of Pan Fibers for their Application as a Reinforcing Component in Composite Materials