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PNIPAM-based Polymers with Selective Absorption for Polar Liquid from Non-Polar Liquid
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Abstract
Separating miscible liquids is an important step in various processes such as wastewater treatment, pharmaceutical engineering, petrochemical product refining, and the food and beverage industry. The current distillation method is limited due to its high energy consumption and lack of ability to separate azeotropes. Herein. we report a poly(n-isopropyl acrylamide) (PNIPAM)-based polymer that demonstrates selective absorption for ethanol from n-heptane. This was verified by refractive index measurements of the feed mixture and the retentate after absorption experiments. Furthermore, PNIPAM copolymerized with fluorinated acrylate (f-PNIPAM). F-PNIPAM exhibited more ethanol absorption which can be attributed to a lowered affinity to n-heptane. These results suggest the potential of the proposed material and mechanism to substitute the distillation method.
Description
These are the slides from a presentation given at National Graduate Research Polymer Conference on 03/20/2025.
Date
2025-03-20
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Publisher
University of Kansas
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Keywords
PNIPAM, Ethanol absorption, Swelling, Hydrogel