Michaela Džuganová, Katarína Tomanová, Viera Jančovičová, Jozef Feranc, Zora Hajduchová, Ján Hronkovič, Jozef Preťo, Ján Kruželák
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FTIR analysis further revealed that lignin (RCL) reduces the main chain scission in devulcanized RC, suggesting a stabilizing effect during devulcanization. The incorporation of devulcanized RC samples in virgin SBR compound resulted in improved cross-linking behaviour and mechanical properties, particularly for SBR/RC65 and SBR/RCL samples. Scanning electron microscopy further confirmed good compatibility of RCL with the SBR matrix. These findings underline the potential of lignin-stabilized devulcanized rubber as a sustainable additive in new rubber composites, advancing waste tyre recycling technologies.</p><h3>Graphical abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"60 41","pages":"19740 - 19754"},"PeriodicalIF":3.9000,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10853-025-11610-1.pdf","citationCount":"0","resultStr":"{\"title\":\"Lignin and devulcanized tyre crumb for next-generation rubber composites\",\"authors\":\"Michaela Džuganová, Katarína Tomanová, Viera Jančovičová, Jozef Feranc, Zora Hajduchová, Ján Hronkovič, Jozef Preťo, Ján Kruželák\",\"doi\":\"10.1007/s10853-025-11610-1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This study investigates the characterization and processing of rubber crumb (RC) obtained as a waste from tread part of truck tyres with a focus on its devulcanization and stabilization using kraft lignin. Thermogravimetric analysis was employed to assess the composition of RC, revealing a three-step degradation pattern. Soxhlet extraction demonstrated the influence of processing temperature on sol fraction and together with rheological testing indicated that mechanical shearing at 65 °C (RC65) maximizes polysulphidic chain scission. Fourier transform infrared spectroscopy (FTIR) confirmed changes in alkane and sulphur-related bands, supporting partial devulcanization of RC samples. FTIR analysis further revealed that lignin (RCL) reduces the main chain scission in devulcanized RC, suggesting a stabilizing effect during devulcanization. The incorporation of devulcanized RC samples in virgin SBR compound resulted in improved cross-linking behaviour and mechanical properties, particularly for SBR/RC65 and SBR/RCL samples. Scanning electron microscopy further confirmed good compatibility of RCL with the SBR matrix. 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Lignin and devulcanized tyre crumb for next-generation rubber composites
This study investigates the characterization and processing of rubber crumb (RC) obtained as a waste from tread part of truck tyres with a focus on its devulcanization and stabilization using kraft lignin. Thermogravimetric analysis was employed to assess the composition of RC, revealing a three-step degradation pattern. Soxhlet extraction demonstrated the influence of processing temperature on sol fraction and together with rheological testing indicated that mechanical shearing at 65 °C (RC65) maximizes polysulphidic chain scission. Fourier transform infrared spectroscopy (FTIR) confirmed changes in alkane and sulphur-related bands, supporting partial devulcanization of RC samples. FTIR analysis further revealed that lignin (RCL) reduces the main chain scission in devulcanized RC, suggesting a stabilizing effect during devulcanization. The incorporation of devulcanized RC samples in virgin SBR compound resulted in improved cross-linking behaviour and mechanical properties, particularly for SBR/RC65 and SBR/RCL samples. Scanning electron microscopy further confirmed good compatibility of RCL with the SBR matrix. These findings underline the potential of lignin-stabilized devulcanized rubber as a sustainable additive in new rubber composites, advancing waste tyre recycling technologies.
期刊介绍：
The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.
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