Thermoresponsive Polymer Sorbents for Efficient Removal of Perfluorinated Compounds via Simple Heating

IF 5.1 1区化学 Q1 POLYMER SCIENCE

Macromolecules Pub Date : 2024-11-21 DOI:10.1021/acs.macromol.4c01868

Xiao Tan, Yiqing Wang, Zhuojing Yang, Yutong Zhu, Chunrong Yu, Kehan Liu, Yutong He, Andrew K. Whittaker, Cheng Zhang

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Abstract

The efficient removal of per- and polyfluoroalkyl substances (PFAS) and recycling sorbents from contaminated water face grand challenges in the field of PFAS remediation. In this work, a series of thermoresponsive perfluoropolyether (PFPE)-containing polymer sorbents were developed for efficient removal of PFAS from contaminated water using a simple heating process. The polymer sorbents are thermoresponsive due to inclusion of the monomer N-isopropylacrylamide (NIPAM). Four block copolymers with the same degree of polymerization (DP) of [2-(acryloyloxy)ethyl]trimethylammonium iodide (AETAI) but increasing DPs of NIPAM were prepared via reversible addition–fragmentation chain-transfer (RAFT) polymerization. The results demonstrate that the balance between hydrophobic/hydrophilic segments from the polymers significantly influences their lower critical transition temperatures (LCSTs), and such balance could be altered by the presence of amphiphilic PFAS. Upon complete sorption, >99% removal for majority of the tested PFAS was achieved by heating the solution mixture to above its lower critical solution temperature and filtration. The study introduces the design and preparation of efficient “smart” PFAS sorbents based on their thermoresponsive properties, offering a new approach to effectively separate PFAS sorbents from treated solutions.

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通过简单加热高效去除全氟化合物的热致伸缩性聚合物吸附剂

高效去除全氟烷基和多氟烷基物质（PFAS）以及从受污染水中回收吸附剂是全氟烷基和多氟烷基物质修复领域面临的巨大挑战。本研究开发了一系列含有热致伸缩性全氟聚醚（PFPE）的聚合物吸附剂，可通过简单的加热过程高效去除污染水中的 PFAS。这种聚合物吸附剂具有热致伸缩性，是因为其中含有单体 N-异丙基丙烯酰胺（NIPAM）。通过可逆加成-断裂链转移（RAFT）聚合法制备了四种嵌段共聚物，[2-（丙烯酰氧基）乙基]三甲基碘化铵（AETAI）的聚合度（DP）相同，但 NIPAM 的聚合度（DP）不断增加。结果表明，聚合物中疏水/亲水段之间的平衡极大地影响了它们的低临界转变温度（LCST），而这种平衡可能会因两亲性全氟辛烷磺酸的存在而改变。在完全吸附后，通过将溶液混合物加热到高于其较低临界溶液温度并进行过滤，大多数受测全氟辛烷磺酸的去除率可达 99%。该研究介绍了基于热吸附特性的高效 "智能 "全氟辛烷磺酸吸附剂的设计和制备，为从处理过的溶液中有效分离全氟辛烷磺酸吸附剂提供了一种新方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Macromolecules 工程技术-高分子科学

CiteScore

9.30

自引率

16.40%

发文量

942

审稿时长

2 months

期刊介绍： Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.