Adaptable Intelligent Filters of Dual Thermo- and pH- Responsive Filter Material.

IF 4.2 3区 化学 Q2 POLYMER SCIENCE
Jingwei Wu, Behnam Pourdeyhimi, Alexander L Yarin
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引用次数: 0

Abstract

In this study, the development of novel pH-responsive and dual thermo- and pH-responsive filter materials is described. The dual-responsive system combines poly(N-isopropylacrylamide) (PNIPAM) for temperature sensitivity and poly(acrylic acid) (PAA) for pH responsiveness, which offers dynamic filtration capabilities tailored to environmental changes. PNIPAM is a thermo-responsive polymer that undergoes significant conformational changes in response to temperature variations. The present work integrates PNIPAM's temperature sensitivity with the pH-responsive properties of PAA, a versatile polymer widely recognized for its ability to change its conformation in response to pH variations. The dual materials developed here undergo conformational changes at specific temperatures and pH levels, modifying their hydrophilicity, pore size, and permeability. In particular, when exposed to higher temperatures, PNIPAM transitions from a hydrated, expanded state to a dehydrated, collapsed state, directly influencing the flow rate and selectivity of the filter medium that comprises it. On the other hand, PAA responds to pH changes by ionizing or deprotonating, causing swelling or shrinkage that alters the filtration performance of the media with embedded PAA. This dual responsiveness allows for the development of advanced filtration systems that can adapt to varying environmental conditions, optimize the capture of specific contaminants, and reduce fouling.

热和pH双响应过滤材料的自适应智能过滤器。
本文介绍了新型ph响应型和双热/ ph响应型过滤材料的研究进展。双响应系统结合了具有温度敏感性的聚n -异丙基丙烯酰胺(PNIPAM)和具有pH响应性的聚丙烯酸(PAA),可根据环境变化提供动态过滤能力。PNIPAM是一种热响应聚合物,其构象随温度变化而发生显著变化。目前的工作将PNIPAM的温度敏感性与PAA的pH响应特性相结合,PAA是一种多功能聚合物,因其响应pH变化而改变其构象的能力而被广泛认可。这里开发的双重材料在特定的温度和pH水平下发生构象变化,改变了它们的亲水性、孔径和渗透率。特别是,当暴露于较高温度时,PNIPAM从水合膨胀状态转变为脱水崩溃状态,直接影响组成它的过滤介质的流速和选择性。另一方面,PAA通过电离或去质子化来响应pH值的变化,引起膨胀或收缩,从而改变嵌入PAA的介质的过滤性能。这种双重响应性允许开发先进的过滤系统,可以适应不同的环境条件,优化特定污染物的捕获,并减少污染。
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
Macromolecular Rapid Communications
Macromolecular Rapid Communications 工程技术-高分子科学
CiteScore
7.70
自引率
6.50%
发文量
477
审稿时长
1.4 months
期刊介绍: Macromolecular Rapid Communications publishes original research in polymer science, ranging from chemistry and physics of polymers to polymers in materials science and life sciences.
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