Enhancement of wear resistance of epoxy composites by introduction of microencapsulated lubricants and magnesium oxide particles
https://doi.org/10.46973/0201-727X_2026_1_151
Abstract
The wear of polymer materials in friction units of transport equipment determines the service life and reliability of rolling stock. The aim of the work is to improve the wear resistance of epoxy composites based on ED-20 resin by introducing magnesium oxide (MgO) particles and polyester capsules with lubricating filler. Microcapsules with a size of 5–30 μm were synthesized by interfacial polycondensation of sebacoyl chloride with polyhydric alcohols. The physical and mechanical properties were determined by indentation (NanoTest 600), tribological characteristics were measured on the II-5018 friction machine according to the "shaftpin" scheme at a load of 55 N and a friction path of 2200 m. The optimal composition was established – ED-20 + 1 wt.% MgO + 1 wt.% microcapsules A237 (I-40 oil), providing a reduction in wear intensity by 82 % (from 55.2 to 10.2 mg/m) and a friction coefficient from 0.40 to 0.23. The plasticity parameter H3/Er2 increased by 15.9 %. The cyclic mechanism of formation of a composite tribolayer from MgO particles, fragments of the epoxy matrix and lubricating oil was revealed by ATR-FTIR and SEM-EDS methods. The results are applicable for the development of self-lubricating polymer materials for friction units of rail transport.
About the Author
A. M. Ananko
Rostov State Transport University (RSTU), Laboratory of Functional Coatings, Research and Testing Center “Nanotechnologies and Tribosystems”
Russian Federation
Russian Federation
Ananko Anatoly Mikhailovich , Research Department Junior Researcher
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Review
For citations:
Ananko A.M. Enhancement of wear resistance of epoxy composites by introduction of microencapsulated lubricants and magnesium oxide particles. Vestnik Rostovskogo Gosudarstvennogo Universiteta Putej Soobshcheniya. 2026;(1):151-160. (In Russ.) https://doi.org/10.46973/0201-727X_2026_1_151
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