Journal of Siberian Federal University. Engineering & Technologies / Effect of Modified Carbon Fibers by Sol- Gel Method on Properties of Polytetrafluoroethylene

Full text (.pdf)
Issue
Journal of Siberian Federal University. Engineering & Technologies. 2024 17 (8)
Authors
Ivanova, Anastasia A.; Vasilev, Andrey P.; Okhlopkova, Aitalina A.; Struchkova, Tatiana S.
Contact information
Ivanova, Anastasia A.: M. K. Ammosov North-Eastern Federal University Yakutsk, Russian Federation; ; Vasilev, Andrey P. : M. K. Ammosov North-Eastern Federal University Yakutsk, Russian Federation; Okhlopkova, Aitalina A.: M. K. Ammosov North-Eastern Federal University Yakutsk, Russian Federation; ; Struchkova, Tatiana S.: M. K. Ammosov North-Eastern Federal University Yakutsk, Russian Federation;
Keywords
polytetrafluoroethylene; polymer composites; carbon fibers; zinc oxide; wear resistance
Abstract

In the work physical- mechanical, tribotechnical and thermodynamic properties of polymer composite materials based on polytetrafluoroethylene (PTFE) and carbon fibers (CF) modified by sol- gel method are investigated. It is shown that filling of PTFE with carbon fibers in the amount of 3 wt.% leads to an increase in tensile strength by 18–22 %, in composites containing 5–10 wt.% carbon fibers remain at the level of the polymer matrix. The Shore D hardness and compressive stress of composites relative to the original PTFE increased by 10–14 % and 21 %, respectively. The study of thermodynamic parameters revealed that with the increase of HC content from 3 to 10 wt.% the enthalpy of melting increased by 8–12 %, and in the case of modified HC decreased by 13–22 % relative to the original PTFE. The study of tribotechnical properties of composites based on PTFE showed a significant improvement in wear resistance while maintaining a low coefficient of friction. In composites with 10 wt.% of fibers wear resistance increased by 775 times in comparison with the initial polymer. It is shown that composites with modified HC have lower values of friction coefficient relative to composites containing fibers without modification. The friction surface of composites was studied by scanning electron microscopy and infrared spectroscopy

Pages
1047–1061
EDN
PFHJLG
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/154307

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