A multifaceted approach for cryogenic waste tire recycling
Yerezhep D. Tychengulova A. Sokolov D. Aldiyarov A.
1 August 2021MDPI AG
Polymers
2021#13Issue 15
One of the important aspects for degradation of the life quality is the ever increasing volume and range of industrial wastes. Polymer wastes, such as automotive tire rubber, are a source of long-term environmental pollution. This paper presents an approach to simplifying the rubber waste recycling process using cryogenic temperatures. The temperature of cryogenic treatment is ranged from 77 K to 280 K. Liquid nitrogen was used as a cryoagent for laboratory tests. Experimental and numerical studies have been carried out to determine the optimal conditions for the recycling process. Numerical studies were performed using the COMSOL Multiphysics cross-platform software. The optimal force of mechanical shock for the destruction of a tire which turned into a glassy state after cryoexposure was determined experimentally. The chemical and physical properties of the final product (crumb rubber) have been studied by scanning electron microscopy and energy dispersive X-ray spectroscopy. The analysis shows that the morphology and elemental composition of the samples remain practically unchanged, demonstrating environmental friendliness of the proposed process.
Cryoagent , Liquid nitrogen , Polymer , Recycling , Rubber , Thermal conductivity , Waste tire
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Faculty of Physics and Technology, Al Farabi Kazakh National University, 71 al-Farabi Ave, Almaty, 050040, Kazakhstan
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