Preparation of environmental resistance and anti-swelling hydrogel through solvent displacement for monitoring human health and movement in amphibious environment

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-01-23 DOI:10.1016/j.cej.2025.159838

Xin Guan, Honglei Liu, Zichun Zhao, Yihan Guo, Wenjun Kang, Jian Sun, Zhaohui Jin, Hailun Ren, Zijian Gao

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引用次数: 0

Abstract

Recently, the utilization of anti-swelling hydrogels in extreme environment garners increasing attention. However, most hydrogels fail to satisfy harsh requirements of maintaining favorable performance in extreme condition due to its porous network structure and high hydrophilicity. Therefore, it is important to design hydrogel with anti-swelling ratio and underwater environmental resistance. Herein, P(AMPS/HEMA/EG) hydrogel was prepared by solvent displacement, which was polymerized by 2-acrylamide-2-methylpropanesulfonic acid (AMPS), hydroxyethyl methacrylate (HEMA) as monomer, N, N’-methylene-bis-acrylamide (MBAA) as crosslinking agent and ammonium persulfate (APS) as initiator in ethylene glycol (EG), followed by solvent displacement. Hydrophilic PAMPS chains and hydrophobic PHEMA chains endowed P(AMPS/HEMA/EG) hydrogel with anti-swelling behavior by reaching hydrophilic-hydrophobic segments balance. The sulfonic acid group formed multiple hydrogen bonds with hydroxyl groups, resulting in P(AMPS/HEMA/EG) hydrogels exhibiting great mechanical properties. The free negatively charged sulfonic acid group and the ionized positively charged hydrogen ions endowed the P(AMPS/HEMA/EG) hydrogel with conductivity. Based on this strategy, the hydrogel showed anti-swelling ratio and underwater environment resistance. After 30 days soaking in 60 ℃ deionized water, 0.2 M NaCl and NaNO₂ solution and acetone, the swelling ratio were −44.05 %, 0.44 %, −12.12 % and –23.96 %, respectively. Furthermore, the mechanical property stability of hydrogel was enhanced by the strong hydrogen bond after solvent displacement. The stress of hydrogel increased by 119.62 % after immersing in 0.6 M NaCl solution for 15 days. Based on the above properties, the hydrogels could be employed as flexible sensor in amphibious environment. Therefore, this environmental resistance hydrogels possessed profound impact on wide range applications.

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溶剂置换法制备抗环境膨胀水凝胶，用于水陆环境中人体健康和运动监测

近年来，抗膨胀水凝胶在极端环境中的应用越来越受到人们的关注。然而，大多数水凝胶由于其多孔网络结构和高亲水性，无法满足在极端条件下保持良好性能的苛刻要求。因此，设计具有抗膨胀比和耐水下环境性能的水凝胶具有重要意义。以2-丙烯酰胺-2-甲基丙磺酸（AMPS）、甲基丙烯酸羟乙酯（HEMA）为单体，N, N ' -亚甲基-双丙烯酰胺（MBAA）为交联剂，过硫酸铵（APS）为引发剂，在乙二醇（EG）中进行溶剂置换聚合，制备P（AMPS/HEMA/EG）水凝胶。亲水性PAMPS链和疏水性PHEMA链通过亲疏水段平衡赋予P（AMPS/HEMA/EG）水凝胶抗膨胀行为。磺酸基与羟基形成多个氢键，使P（AMPS/HEMA/EG）水凝胶具有良好的力学性能。游离的带负电的磺酸基团和电离的带正电的氢离子赋予了P（AMPS/HEMA/EG）水凝胶具有导电性。基于该策略，水凝胶具有抗膨胀率和水下环境抗性。在60℃去离子水、0.2 M NaCl、NaNO2溶液和丙酮中浸泡30 d后，溶胀率分别为- 44.05 %、0.44 %、- 12.12 %和-23.96 %。溶剂置换后的强氢键增强了水凝胶的力学性能稳定性。在0.6 M NaCl溶液中浸泡15 d后，水凝胶的应力增加了119.62 %。基于上述特性，水凝胶可以作为柔性传感器应用于两栖环境。因此，这种环境抗性水凝胶具有深远的影响和广泛的应用前景。

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.