A Multifaceted Approach for Cryogenic Waste Tire Recycling

Yerezhep, D.; Tychengulova, Aliya; Sokolov, D.; Aldiyarov, A.

doi:10.3390/polym13152494

Cited by 14 publications

(11 citation statements)

References 61 publications

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“… The different materials extracted from end-of-life tires such as (1) textile fiber, (2) metal cord, (3) large size fraction of rubber crumb (1–5 mm), (4) mean size fraction (1–2 mm), and (5) small size fraction (0.1–1 mm) [ 15 ]. …”

Section: Figurementioning

confidence: 99%

“…Figure 1 shows that ELT can be processed into rubber granulates, such as rubber chips, rubber crumbs and rubber powder, as well as other components from tire reinforcement: steel and textile fibers [ 15 ]. Besides rubber as the main component of used tires, steel wires and textile fibers are two by-products derived from the treatment of ELT, but both are generally discarded as undervalued resources.…”

Section: Introductionmentioning

confidence: 99%

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Sustainable Reuse of Waste Tire Textile Fibers (WTTF) as Reinforcements

Fazli

Rodrigue

2022

Polymers

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Waste tire textile fibers (WTTF), as a by-product (10–15% by weight of tires) of end-of-life tires (ELT) mechanical recycling (grinding), are classified as hazardous wastes and traditionally burnt (thermal recycling) or buried (landfilling), leading to several environmental and ecological issues. Thus, WTTF still represent an important challenge in today’s material recycling streams. It is vital to provide practical and economical solutions to convert WTTF into a source of inexpensive and valuable raw materials. In recent years, tire textile fibers have attracted significant attention to be used as a promising substitute to the commonly used natural/synthetic reinforcement fibers in geotechnical engineering applications, construction/civil structures, insulation materials, and polymer composites. However, the results available in the literature are limited, and practical aspects such as fiber contamination (~65% rubber particles) remain unsolved, limiting WTTF as an inexpensive reinforcement. This study provides a comprehensive review on WTTF treatments to separate rubber and impurities and discusses potential applications in expansive soils, cement and concrete, asphalt mixtures, rubber aerogels and polymer composites.

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Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sustainable Reuse of Waste Tire Textile Fibers (WTTF) as Reinforcements

Fazli

Rodrigue

2022

Polymers

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“…Generally, the existing reclamation techniques for waste rubber (WR) include microwave [12][13][14], ultrasound [15,16], chemical modification [17][18][19][20][21], ambient grinding [22], cryogenic grinding [23,24], and biological methods [25]. However, low yield and high energy consumption technologies are not suitable for industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Selective Decomposition of Waste Rubber from the Shoe Industry by the Combination of Thermal Process and Mechanical Grinding

et al. 2022

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A major challenge in waste rubber (WR) industry is achieving a high sol fraction and high molecular weight of recycled rubber at the same time. Herein, the WR from the shoe industry was thermo-mechanically ground via the torque rheometer. The effect of grinding temperature and filling rate were systematically investigated. The particle size distribution, structure evolution, and morphology of the recycled rubber were explored by laser particle size analyzer, Fourier transform infrared spectroscopy (FTIR), sol fraction analysis, gel permeation chromatography (GPC), differential scanning calorimeter (DSC), and scanning electron microscope (SEM). The results indicate that the thermo-mechanical method could reduce the particle size of WR. Moreover, the particle size distribution of WR after being ground can be described by Rosin’s equation. The oxidation reaction occurs during thermal-mechanical grinding. With the increase of the grinding temperature and filling rate, the sol fraction of the recycled WR increases. It is also found that a high sol fraction (43.7%) and high molecular weight (35,284 g/mol) of reclaimed rubber could be achieved at 80 °C with a filling rate of 85%. Moreover, the obtained recycled rubber compound with SBR show a similar vulcanization characteristics to pure SBR. Our selective decomposition of waste rubber strategy opens up a new way for upgrading WR in shoe industry.

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“…1,2 In addition, the wear debris generated by the friction between the tire and the road, and the wear debris could cause soil pollution, environmental pollution, and even pose a threat to human health. [3][4][5][6] Improving the wear resistance and wet grip resistance of tires is a great significance to the green development of the tire industry. 7,8 However, the wear resistance and wet grip resistance of tires are mutually restricted.…”

Section: Introductionmentioning

confidence: 99%

“…On wet and slippery roads, the friction coefficient between the tire and the road decreased, and the grip decreased, which directly affected the driving safety 1,2 . In addition, the wear debris generated by the friction between the tire and the road, and the wear debris could cause soil pollution, environmental pollution, and even pose a threat to human health 3–6 . Improving the wear resistance and wet grip resistance of tires is a great significance to the green development of the tire industry 7,8 .…”

Section: Introductionmentioning

confidence: 99%

Design of bionic tire tread compounds with pit structures and the improvement mechanism of wear and wet grip resistance

Mao

Sun

Yang

et al. 2022

J of Applied Polymer Sci

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Wear resistance and wet grip resistance are the main properties of tires, but they are often contradictory and difficult to synergize. In this paper, drawing on the bionics concept, the bionic topography of the pits was introduced into the design of the tread rubber structure, and the synergistic improvement mechanism of the tire tread rubber with the bionic pit structures was explored. The overall performance improvement of tread compounds provided a new approach. The research showed that the designed high wear resistance tire tread compounds W2 had the best wear resistance, and the high wet grip resistance tire tread compounds S3 had the best‐wet grip resistance. When the diameter of the bionic unit was 2.5 mm and the pit number was 6, the wear resistance rate of the sample was the highest (about 11.86%), and the wear amount was 70.6; the maximum wet friction coefficient of the sample sliding on the sandpaper surface and the smooth glass surface was 0.834 and 0.71, the corresponding wet grip resistance improvement rates were also 11.89% and 12.34%, respectively. Experiments have proved that the tire tread compounds with the bionic pit structures composed of W2S3 can effectively synergistically improve wet grip resistance and wear resistance.

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A Multifaceted Approach for Cryogenic Waste Tire Recycling

Cited by 14 publications

References 61 publications

Sustainable Reuse of Waste Tire Textile Fibers (WTTF) as Reinforcements

Sustainable Reuse of Waste Tire Textile Fibers (WTTF) as Reinforcements

Selective Decomposition of Waste Rubber from the Shoe Industry by the Combination of Thermal Process and Mechanical Grinding

Design of bionic tire tread compounds with pit structures and the improvement mechanism of wear and wet grip resistance

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