MUMBAI, India, June 30 -- Intellectual Property India has published a patent application (202641075857 A) filed by Paavai Engineering College; and Ms. S. Madhumitha on June 19, 2026, for Biodegradable Film Using Rice Starch Natural Ph Indicator.
Inventors include Ms. R. Akalya; Ms R Harsalya; Ms. S Mythilipriya; Ms. S Rashika; and Ms P Gomathi.
The application for the patent was published on June 26, 2026, under issue no. 26/2026.
Abstract: The present invention discloses a biodegradable and intelligent film for food packaging that enables real-time monitoring of food freshness through a visible colorimetric response. The film employs rice starch as a renewable, low-cost, biodegradable film-forming matrix, glycerol as a plasticizer to impart flexibility, and a natural anthocyanin-rich pH indicator obtained from hibiscus extract as a non-toxic sensing agent. The film is prepared by a solution-casting method in which gelatinized rice starch, glycerol, and the natural indicator are combined into a homogeneous solution, cast, and dried to form a uniform, flexible film. In a preferred formulation, it is produced from approximately one hundred and ten milliliters of distilled water, five grams of rice starch, four milliliters of glycerol, and ten milliliters of the natural indicator. The anthocyanin pigments confer high pH sensitivity, producing a distinct color transition from red or pink under acidic conditions to blue or green under alkaline conditions, and respond to volatile compounds such as ammonia released during spoilage. The film is mechanically stable and fully biodegradable in soil, offering an affordable, eco-friendly, and effective solution for sustainable packaging and intelligent food-quality monitoring.
Disclaimer: Curated by HT Syndication.
