Elastomeric compositions with rice husk-based bio-ingredients

In the context of the global growth of green chemistry and the circular economy, the use of crushed rice husk (CRH) as a bio-ingredient in elastomeric compositions offers an environmentally sustainable alternative. It has been found that modification of the husk with surfactants, in particular the cationic quaternary ammonium salt (QAS-4) synthesized from sugar-industry biowaste, significantly improves the interaction between the husk and the rubber matrix, increases the degree of crosslinking, and enhances the physical and mechanical properties of the rubbers, such as tear and heat resistance. Experimental results showed that compositions with CRH modified with QAS-4 demonstrate advantages in processability, including preservation of the rubber compound's plasticity and acceleration of sulfur vulcanization, as well as improved performance characteristics of industrial rubbers compared with traditional fillers. The use of CRH, especially in a modified form, is a promising direction for creating environmentally friendly and cost-effective elastomeric compositions.