MUMBAI, India, May 30 -- Intellectual Property India has published a patent application (202311081170 A) filed by Council Of Scientific And Industrial Research, New Delhi, on Nov. 29, 2023, for 'melt extruded ion-exchange membrane and method for preparation thereof.'
Inventor(s) include Rajaram Krishna Nagarale; and Chetan Mohan Pawar.
The application for the patent was published on May 30, under issue no. 22/2025.
According to the abstract released by the Intellectual Property India: "Ion-exchange membranes play a crucial role in electrochemical energy devices, with their suitability for specific applications determined by factors such as chemical stability, mechanical strength, and electrochemical properties. In this study, we present a robust method for preparing ion exchange 5 membranes using styrene-divinyl benzene, 4-vinyl pyridine, and polypropylene through melt extrusion. To create a homogeneous and self-standing cation exchange membrane, we employed copolymerization of styrene-divinyl benzene in a polypropylene melt, followed by sheet extrusion and sulfonation. Similarly, the anion exchange membrane was developed through copolymerization of styrene-divinyl benzene and 4-vinyl pyridine in a polypropylene melt, followed by sheet 10 extrusion and quaternization. The resulting membranes exhibited excellent electrochemical and physicochemical properties. In a practical application, specifically in a vanadium redox flow battery, the cation exchange membrane demonstrated an impressive 80% capacity retention during the initial 100 charge/discharge cycles at a current density of 100 mA/cm2. This clear demonstration highlights the superior utility of the developed membrane in energy device applications."
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