MUMBAI, India, Nov. 2 -- Intellectual Property India has published a patent application (202641125527 A) filed by Indian Institute Of Technology Madras Iit Madras; and Chennai Petroleum Corporation Limited Cpcl on October 21, 2026, for A Biodegradable Film Composite And A Method Of Preparing The Same.
Inventors include Swathi Sudhakar; Arockia Rajan A; Nithya Raj M; Ramanamoorthy S; Naval Kishore Laguri; Ramya Mani; Senthilnathan Jaganathan; and Lavanya Melcureraj.
The application for the patent was published on October 30, 2026, under issue no. 44/2026.
Abstract: ABSTRACT A BIODEGRADABLE FILM COMPOSITE AND A METHOD OF PREPARING THE SAME A thin film composite membrane for water purification comprises a nonwoven backing, a porous polycaprolactone support layer having NaY zeolite and reduced graphene oxide dispersed within its bulk at 0.05 to 0.2 percent (w/v), a polydopamine interlayer functionalised with aminopropyltriethoxysilane, and an aliphatic polyamide selective layer formed by interfacial polymerisation of 1,10-diaminodecane with terephthaloyl chloride. Alkaline activation, polydopamine deposition and aminosilane grafting act in sequence to lower the water contact angle from 70 to 12 to 15 degrees and to anchor a defect free selective layer. At 0.2 percent (w/v) loading the membrane rejects 94 percent of sodium chloride from a 10,000 parts per million feed at 10 bar, rejects 91 to 95 percent of Alizarin Red, Eriochrome Black T and Methylene Blue, rejects approximately 99 percent of chromium, copper and lead ions, reduces the viability of Staphylococcus aureus and of Escherichia coli by more than 97 percent. FIG. 2
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