Pumpkin Peel Film Outperforms Plastic in Food Preservation

A research team at Kyushu University in Fukuoka, Japan, has developed a food packaging film from pumpkin peel that outperforms standard plastics. Under the guidance of Professor Fumihiko Tanaka and Associate Professor Fumina Tanaka, the team converted pumpkin peel into carbon quantum dots (CQDs) with antimicrobial and UV-blocking properties. By mixing these CQDs with carboxymethyl cellulose and gelatin, they created a strong composite film. Tests on cherry tomatoes showed this film effectively slowed microbial growth, minimized weight loss and softening, and kept produce fresher than both plastic-wrapped and unpackaged tomatoes. Their study, published in Food Research International, was inspired by a Southeast Asian student aiming to enhance cold-chain logistics in the region. Unlike traditional antimicrobial packaging that uses harmful metal nanoparticles, these organic CQDs offer a more eco-friendly option and even glow under UV light, hinting at potential for decorative uses.