In the quest for sustainable building materials, researchers have turned to an unlikely duo: pineapple fibers and sawdust. A recent study published in *Scientific Reports* (translated from Latin as “Reports of the Academy”) explores the potential of these underutilized bio-wastes to create high-performance, eco-friendly composites. The research, led by Palanivendhan Murugadoss from the Center for Automotive Materials at SRM Institute of Science and Technology, could pave the way for innovative solutions in the construction industry.
The study focuses on Ananas erectifolius fiber (AEF), a type of pineapple fiber, reinforced epoxy composites filled with sawdust particulates. The goal? To develop sustainable alternatives to conventional construction materials. The team fabricated composites using the hand layup method followed by compression molding, incorporating varying amounts of sawdust while keeping the fiber mass constant.
One composite, containing 18 grams of sawdust (Sample C3), stood out for its superior performance. It achieved a tensile strength of 51.09 MPa, flexural strength of 54.98 MPa, impact strength of 14.98 kJ/m², and a Shore D hardness of 51. “The mechanical properties of this composite are truly impressive,” said Murugadoss. “They rival those of many conventional materials, making it a viable option for various construction applications.”
The team also conducted thermal assessments, which revealed that Sample C3 exhibited the lowest thermal conductivity (0.72 W/mK), a reduced coefficient of linear thermal expansion (62.1×10⁻⁶/°C), and the highest heat deflection temperature (123°C). “These thermal properties are crucial for building materials, as they directly impact energy efficiency and durability,” Murugadoss explained.
The composites also demonstrated enhanced thermal stability, with approximately 18% residual mass at 600°C, and good dimensional stability with a low water absorption rate of 5.99%. Additionally, antibacterial testing against E. coli produced a 26 mm inhibition zone at 100 µg concentration, indicating potential applications in hygienic environments.
So, what does this mean for the future of construction? The integration of Ananas erectifolius fiber and sawdust into building materials could significantly reduce waste and promote sustainability. “This research highlights the potential of underutilized bio-wastes to create high-performance, eco-friendly composites,” Murugadoss said. “It’s a step towards a more sustainable future.”
The study’s findings could shape future developments in the field, encouraging further exploration of natural fibers and bio-wastes in construction materials. As the world grapples with environmental challenges, innovative solutions like these could play a pivotal role in creating a more sustainable built environment. The research was published in *Scientific Reports*, a prestigious, peer-reviewed journal that showcases high-quality research across all areas of science.