Keyword: «carbon nanofibers»

The results of a study of the conditions and duration influence of the carbon nanofibers (CNF) synthesis on the physico-mechanical characteristics of polyethylene composites based on them are presented. CNF were obtained by the catalytic pyrolysis of hydrocarbons. It has been established that the introduction of CNF doped with nitrogen leads to decrease in the deformation-strength characteristics of the composite. Samples of composites containing CNFs with the shortest synthesis time (up to 40 min) were characterized by the best abrasive resistance.

The results of deformation-strength and tribological studies of polymer composite materials based on PTFE and carbon nanofibers UNV-01 and UNV-02 produced by the Federal Research Center Boreskov Institute of Catalysis. It is shown that when UNV-01 is added, the strength of the composites increases up to 25 MPa, and the wear resistance increases up to 20 times compared to PTFE. It has been established that particles of carbon nanofibers introduced into the volume of PTFE in small amounts (0.01–0.1 wt.%) have a plasticizing effect, which is expressed in an increase in the deformability and a decrease in the strength of the polymer composite. With an increase in the concentration of UNV-02 to 2 wt.%, the modulus of elasticity and the mass wear rate decrease by 76 times, which indicates an effect on tribotechnical characteristics. With the introduction of UNV-02 into the activated matrix up to 5 wt.%, the wear resistance increases by 1707 times.