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Influence of a hybrid complex of fillers including olivinite and magnesium spinel on the structure and properties of polytetrafluoroethylene

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Abstract

Polytetrafluoroethylene is a polymer that possesses valuable properties for use as materials with a low coefficient of friction. However, it has a very low wear resistance, which is increased by the introduction of fillers. Since using only one type of filler often does not lead to the desired results, using two types of fillers can solve this problem. The paper discusses the possibility of using a hybrid complex of fillers from olivinite and magnesium spinel to create polymer composite materials (PCM) based on polytetrafluoroethylene (PTFE). Preliminary mechanical activation of olivinite was applied to improve the compatibility with the polymer matrix and increase the degree of dispersion of olivinite. It was shown that the introduction of hybrid fillers improves the tribological properties of PTFE. The wear resistance of low-filled composites based on PTFE has been found to increase up to 160 times, which is associated with the active structuring role of mechanically activated olivinite particles. These small particles of fillers contribute to the formation of the spherulite-like supramolecular structure in the composite. The wear resistance of polymer composites is improved due to the secondary structure on the friction surface. The friction surface of composites was studied using infrared spectroscopy (IR) and scanning electron microscope (SEM). It was demonstrated that secondary structure consists of the products of the tribo-oxidation process. The formation of a wear-resistant friction surface is associated with the formation of a strong transfer film on the counterbody and the course of tribochemical reactions.

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Data availability

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Funding

This research was funded by the Ministry of Science and Higher Education of the Russian Federation (grant numbers [FSRG-2021-0016]).

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Authors and Affiliations

  1. Institute of Natural Sciences, North-Eastern Federal University, Belinskiy st., 58, Yakutsk, 677000, Russia

    Iuliia Valerievna Kapitonova, Praskovia Nikolaevna Tarasova, Aitalina Alekseevna Okhlopkova & Nadezhda Nikolaevna Lazareva

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  1. Iuliia Valerievna Kapitonova
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  2. Praskovia Nikolaevna Tarasova
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  3. Aitalina Alekseevna Okhlopkova
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  4. Nadezhda Nikolaevna Lazareva
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Correspondence to Iuliia Valerievna Kapitonova.

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Kapitonova, I.V., Tarasova, P.N., Okhlopkova, A.A. et al. Influence of a hybrid complex of fillers including olivinite and magnesium spinel on the structure and properties of polytetrafluoroethylene. J Polym Res 30, 328 (2023). https://doi.org/10.1007/s10965-023-03710-w

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