Pineapple leaves are an agricultural byproduct usually left to rot or burnt. This project utilizes the cellulose fibers in these leaves to create eco-aerogels—the world's lightest solid materials. These aerogels are highly porous, biodegradable, and non-toxic. They exhibit remarkable properties such as low thermal conductivity and the ability to absorb up to 80 times their weight in oil, providing a sustainable solution for both industrial insulation and environmental remediation.
The process starts with mechanical shredding of pineapple leaves to extract raw cellulose fibers. These fibers are chemically treated to remove lignin and then mixed with a cross-linking agent in an aqueous solution. The mixture is freeze-dried (lyophilization) to remove the solvent while maintaining the 3D porous structure, resulting in a solid, ultra-lightweight aerogel.
Synthetic face masks are a major source of microplastic pollution. This project uses the strong, long-staple fibers from pineapple leaves to create non-woven fabric for face masks. These masks offer similar filtration efficiency to standard surgical masks but are 100% biodegradable, breaking down in soil within a few months. This initiative provides a circular solution for the massive personal protective equipment (PPE) waste problem.
Fibers are extracted from pineapple leaves through a decortication process. They are then cleaned and bonded together using a mechanical needle-punching or hydro-entanglement technique to create a non-woven web. This fabric is then cut and assembled into multi-layer masks with cotton-based ear loops for a completely plastic-free product.
Pineapple stems are a rich but underutilized source of industrial starch. This project focuses on extracting starch from the discarded stems of the pineapple plant to create flexible bioplastic sheets. Unlike petroleum plastics, these sheets are carbon-neutral and compostable. By modifying the starch with natural plasticizers, researchers have achieved a material with high tensile strength and clarity, suitable for a wide range of packaging applications.
The pineapple stems are crushed to extract raw starch milk, which is then purified and dried. The starch is blended with natural additives (like glycerol) and subjected to heat and mechanical shear (Gelatinization). This thermoplastic starch is then extruded into thin sheets or cast onto flat surfaces to form flexible, transparent bioplastic films.
