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Influence of Dodecylated Lignin/Carbon Black Hybrid Filler System on the Performance of Natural Rubber
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DOI：10.11777/j.issn1000-3304.2025.25285.png)
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Abstract
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To enhance the interfacial compatibility and dispersion of lignin within the natural rubber (NR) matrix,thereby enhancing the mechanical properties of the rubber composite, dodecylated lignin (DL) was synthesized through alkylation modification, and a hybrid filler system was constructed by incorporating it with carbon black (CB). The influence of the DL/CB ratio on the properties of NR composites was systematically investigated. The results indicated that the incorporation of DL reduced the optimum curing time and Mooney viscosity of the composites, effectively improved the dispersion of the fillers in the rubber matrix, and significantly enhanced the mechanical properties, thermo-oxidative aging resistance, and flex resistance of the composites. Among the tested formulations, the NR-10DL/40CB composite exhibited the best performance. While maintaining thermal stability,tensile strength, and wet skid resistance comparable to those of the NR-50CB benchmark, the NR-10DL/40CB composite achieved a remarkable 21.1% increase in elongation at break. Furthermore, the thermal oxidative aging coefficient and the number of flex cracking cycles were improved by 31.1% and 41.4%, respectively, while the rolling resistance and cut resistance were optimized. These findings demonstrate the promising potential of the composite for application in rubber products such as tires and conveyor belts.
Keywords:
Natural rubber
Dodecylated lignin
Carbon black
Composites
Mechanical properties
Journal
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1.3
Papers:
180
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1.2K
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