Palm oil shows promise as an eco-friendly processing aid for natural rubber composites, according to a study conducted by researchers at Newcastle University in Singapore. Published on July 9, 2026, the study explores the potential of palm oil to replace petroleum-derived aromatic oils commonly used in rubber manufacturing.
Palm Oil vs. Aromatic Oils in Rubber Processing
Natural rubber is essential in industries such as transport, construction, and health care due to its elasticity and durability. Traditionally, rubber manufacturers have relied on aromatic oils for processing, which pose health and environmental risks due to the presence of polycyclic aromatic hydrocarbons.
The study aimed to determine if palm oil could serve as a viable alternative for these aromatic oils in silica-filled natural rubber composites. With natural rubber and palm oil being significant resources in Southeast Asia, particularly in Thailand, the findings could support local economies while promoting sustainable practices.
Research Findings on Palm Oil Composites
Researchers compared the performance of palm oil and aromatic oil using a latex processing method that effectively disperses silica in the rubber matrix. The results indicated that palm oil exhibited a comparable cure rate index, suggesting it does not significantly disrupt the curing process.
Key findings from the study include:
- Cure rate index for palm oil: similar to aromatic oil
- Payne effect values: 171 kPa (palm oil) vs. 182 kPa (aromatic oil)
- Higher Young's modulus in palm oil composites
- Lower tan δ value at 60°C for palm oil, indicating reduced rolling resistance
Environmental Impact and Sustainability Considerations
While the study highlights the technical viability of palm oil, it also presents a complex environmental picture. The palm oil-based formulation showed reductions in fossil fuel depletion and human toxicity compared to aromatic oil formulations. However, it exhibited higher global warming potential and eutrophication potential, raising concerns about agricultural practices.
The researchers emphasize that the sustainability of palm oil depends on responsible sourcing and production practices. The findings suggest that palm oil can partially replace aromatic oils in rubber composites, potentially reducing reliance on petroleum products without compromising performance.
This research opens avenues for rubber manufacturers, tire compounders, and sustainability teams to explore renewable processing aids derived from regional resources, enhancing the value of local agricultural products.
🤖 This article was rewritten by Feed and Figures' editorial AI from a report originally published by Phys.org. Facts and quotes are preserved from the original; the rewrite focuses on clarity and structure. For the unedited original, see the source link below.
