Miedzianowska-Masłowska, et al (2024) Waste management of straw to manufacture biocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More: An alternative reinforcing filler for natural rubber biocomposites. Industrial Crops and Products. https://doi.org/10.1016/j.indcrop.2024.119629

This study investigates the potential of utilizing oat straw-derived biochar as a sustainable alternative to carbon black in natural rubber biocomposites. Carbon black, commonly used in rubber products like tires, has a high carbon footprint due to its fossil fuel origins. As the world aims for climate neutrality, biochar, produced through pyrolysisPyrolysis is a thermochemical process that converts waste biomass into bio-char, bio-oil, and pyro-gas. It offers significant advantages in waste valorization, turning low-value materials into economically valuable resources. Its versatility allows for tailored products based on operational conditions, presenting itself as a cost-effective and efficient More of agro-industrial residues, presents a renewable and eco-friendly alternative.

The research examined the effects of biochar produced at different pyrolysis temperatures (600°C and 900°C) on the mechanical and thermal properties of rubber composites. The findings revealed that biochar at 600°C was as effective as that at higher temperatures. Biochar-filled composites exhibited enhanced tensile strength compared to those filled with carbon black, reaching 21.3 MPa. However, these composites showed poor resistance to thermo-oxidative aging, which limits their durability.

Key tests, including rheometry and differential scanning calorimetry, confirmed that biochar can positively influence cross-linking in rubber. Despite its environmental benefits and mechanical strength, the susceptibility of biochar to aging requires further improvement. Strategies such as surface modifications or anti-aging additives could help enhance its performance.

The study suggests that biochar, as a renewable resource, could reduce dependency on fossil fuels in rubber production. However, its industrial application requires additional research, particularly to improve aging resistance for long-term use.