New ion-sieving filter #nanomembrane #waterpurification #chemistry #innovation #technology

Scientists have developed a new type of filter that can separate molecules based on their chemical properties, not just size. This "ion sieve" is made from polydopamine, a material similar to what mussels use to stick to surfaces. The membrane, produced using an electropolymerization process, has tiny channels with special surface chemistry that allows it to differentiate between ions with similar size but different charges, like sodium and magnesium. This is achieved by mimicking the selective permeability found in biological systems like cell membranes. This technology, featured in the journal Advanced Materials, could lead to more efficient water filtration for industrial waste and other applications, including separating dyes and other chemicals in various industries like pharmaceuticals and wastewater treatment. The polydopamine membrane is environmentally friendly, biocompatible, and easy to modify for specific needs.