Introduction to the field of development of modern materials poses the problem of creating composites with improved performance characteristics for researchers. Metal-polymer nanocomposites, combining the advantages of metals and polymers, are a promising direction for solving this problem. This paper presents the results of a study of the mechanical and tribological properties of new nanocomposites based on linear low-density polyethylene (LLDPE) and the quasi-crystalline phase Al65Cu22Fe13.
Nanocomposites were obtained by mixing LLDPE with different concentrations of quasicrystalline Al65Cu22Fe13 powder using the extrusion method. Mechanical tests included determination of tensile strength, elastic modulus and relative elongation at break. Tribological tests were carried out on a tribometer using the ball-on-plane scheme to evaluate the coefficient of friction and wear.
The introduction of the quasi-crystalline phase Al65Cu22Fe13 into the LLDPE matrix leads to an increase in the mechanical characteristics of the nanocomposites. It was found that the tensile strength and elastic modulus increase with increasing concentration of quasi-crystals. Tribological tests showed a decrease in the coefficient of friction and wear of the nanocomposites compared to pure LLDPE.
The developed metal-polymer nanocomposites based on LLDPE and Al65Cu22Fe13 quasicrystals have improved mechanical and tribological properties. The results obtained allow us to consider these materials as promising for use in various fields of technology where high strength and wear resistance are required.
For the first time, metal-polymer nanocomposites based on linear low-density polyethylene with quasicrystalline inclusions of Cu22 13, obtained by mixing in the molten state, have been developed. Thermal stability and physical-mechanical characteristics of these new nanocomposites have been studied using thermal and dynamic mechanical analysis methods. It has been established that an increase in the filler proportion leads to an increase in the elastic modulus. At the same time, the tensile strength also demonstrates an increase, especially noticeable at low filler concentrations.
Friction properties and wear resistance were evaluated using a pin-on-disk tribometer. Experiments showed that the friction coefficient of the sample containing 1% filler is lower than that of the original LDPE. The wear resistance of the composite increased by 57% compared to pure polyethylene. Additionally, when friction is applied with a load of up to 147 N, a protective film enriched with metal nanoparticles is formed on the friction surface, providing an antifriction effect.
Author: IE Uflyand, EG Drogan, VE Burlakova, KA Kydralieva, IN Shershneva, GI Dzhardimalieva
Institute: Key Laboratory of Material Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China