期刊
JOURNAL OF COMPOSITES SCIENCE
卷 5, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/jcs5030068
关键词
circular economy; sustainability; recycling; ground tire rubber; surface treatment; chemical modification; styrene-butadiene rubber
资金
- State Research Agency of Spain (AEI) [PID2019-107501RB-I00, RYC2017-22837]
- Community of Madrid [PEJ 2019-AI/IND-1635]
The surface modification of GTR through cryo-grinding and chemical treatment, followed by its incorporation into rubber composites, has resulted in improved mechanical performance of the composite material.
The management of end-of-life tires (ELTs) is one of the main environmental issues that society faces nowadays. Recycling of ELTs appears as one feasible option for tackling the problem, although their incorporation as ground tire rubber (GTR) in other rubber matrices is limited due to poor compatibility. In this research, we report a successful combination of a cryo-grinding process with a chemical treatment for modifying the surface of GTR. Various cryo-grinding protocols were studied until a particle size of 100-150 mu m was achieved. Chemical treatments with different acids were also analyzed, resulting in the optimal modification with sulfuric acid (H2SO4). Modified GTR was added to a styrene-butadiene rubber (SBR) matrix. The incorporation of 10 phr of this filler resulted in a composite with improved mechanical performance, with increments of 115% and 761% in tensile strength and elongation at break, respectively. These results validate the use of a recycled material from tire waste as sustainable filler in rubber composites.
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