Reprocessible, Reusable, and Self-Healing Polymeric Adsorbent for Removing Perfluorinated Pollutants

Here, we report a reprocessible, reusable, self-healing, and form-switching polymeric adsorbent for remediating fluorinated pollutants in water. The copolymer hydrogel is designed to contain fluorophilic segments and cationic segments to induce strong binding with perfluorinated pollutants. The sorp...

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Published in:Materials 2024-10, Vol.17 (21), p.5170
Main Authors: Kim, Sun Ju, Baek, Minjoon, Choe, Jihye, Shin, Jaeman J
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Cationic polymerization
Copolymers
Crosslinking
Fluorination
Hydrogels
Micelles
Perfluoroalkyl & polyfluoroalkyl substances
Pollutants
Segments
Self healing materials
Self-assembly
Synergistic effect
Water pollution
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creator Kim, Sun Ju
Baek, Minjoon
Choe, Jihye
Shin, Jaeman J
description Here, we report a reprocessible, reusable, self-healing, and form-switching polymeric adsorbent for remediating fluorinated pollutants in water. The copolymer hydrogel is designed to contain fluorophilic segments and cationic segments to induce strong binding with perfluorinated pollutants. The sorption performance reveals rapid and quantitative removal of these pollutants, driven by the synergistic effect of fluorophilic and electrostatic interaction. Importantly, a disulfide-containing dynamic crosslinker plays a crucial role in imparting multifunctionality. This enables self-healing by the restoration of crosslinks at the cut surfaces by disulfide exchange reactions and allows for the repeated use of the adsorbent via multiple adsorption-desorption cycles. Furthermore, the adsorbent is reprocessible by cleaving the crosslinks to afford linear copolymers, which can be repolymerized into a hydrogel network on demand. Also, form-switching capability is showcased through the aqueous self-assembly of linear copolymers into a fluorinated micelle, serving as another form of adsorbent for pollutant removal.
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subjects Adsorbents
Adsorption
Cationic polymerization
Copolymers
Crosslinking
Fluorination
Hydrogels
Micelles
Perfluoroalkyl & polyfluoroalkyl substances
Pollutants
Segments
Self healing materials
Self-assembly
Synergistic effect
Water pollution
title Reprocessible, Reusable, and Self-Healing Polymeric Adsorbent for Removing Perfluorinated Pollutants
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