Jellyfish-inspired alginate composite hydrogel filter prepared by macro-micro double bionic strategy for efficient water purification

IF 6.1 2区 环境科学与生态学 Q2 ENGINEERING, ENVIRONMENTAL
Huiting Peng, Yan Chen, Jiaopan Lin, Chelsea Benally, Mohamed Gamal El-Din, Junkai Gao
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Abstract

Recently, research on hydrogel materials with a porous structure and superior water absorption capabilities significantly grown. However, the hydrogel under gravity-driven separation conditions often exhibit an unstable pore structure, poor mechanical properties, and limited functionality. To this end, this work presents a novel approach that combines a macro-micro double bionic strategy with a triple crosslinking method to develop a multifunctional alginate composite hydrogel filter (2%-SA-κ-CG-PVA-Ca2+, 2%-SKP-Ca2+ for short) with a stable pore structure and superior mechanical properties, which possessed an umbrella-shaped structure resembling that of jellyfish. The 2%-SKP-Ca2+ filter was synthesized using polyvinyl alcohol (PVA) as a stable structure-directing agent, and sodium alginate (SA) and κ-carrageenan (κ-CG) as polymer hydrogels. The distinctive umbrella-shaped hydrogel of 2%-SKP-Ca2+ filter, formed through the triple crosslinking method, overcomes the limitations of unstable pore structure and poor durability seen in hydrogels prepared by traditional crosslinking methods. Furthermore, the utilization of the 2%-SKP-Ca2+ filter in water treatment demonstrates its good selective permeability, excellent resistance to fouling, and extended longevity, which enables it to simultaneously achieve the multifunctional water purification and the coating of multi-substrate anti-fouling coatings. Therefore, not only does this research provide an efficient, multifunctional, highly pollution-resistant preparation method for designing a new filter, but it also confirms the application prospect of the macro-micro dual bionic strategy developed in this study in complex water treatment.

Abstract Image

利用宏微双仿生策略制备的海蜇启发藻酸盐复合水凝胶过滤器,用于高效净水
最近,对具有多孔结构和卓越吸水能力的水凝胶材料的研究显著增加。然而,在重力驱动的分离条件下,水凝胶往往表现出不稳定的孔隙结构、较差的机械性能和有限的功能性。为此,本研究提出了一种新方法,将宏观-微观双仿生策略与三重交联法相结合,开发出一种多功能海藻酸盐复合水凝胶过滤器(2%-SA-κ-CG-PVA-Ca2+,简称 2%-SKP-Ca2+),它具有稳定的孔隙结构和优异的机械性能,并具有类似水母的伞状结构。2%-SKP-Ca2+ 过滤器是以聚乙烯醇(PVA)为稳定结构导向剂,海藻酸钠(SA)和κ-卡拉胶(κ-CG)为聚合物水凝胶合成的。通过三重交联法形成的 2%-SKP-Ca2+ 过滤器独特的伞状水凝胶克服了传统交联法制备的水凝胶孔隙结构不稳定和耐久性差的局限性。此外,2%-SKP-Ca2+ 过滤器在水处理中的应用表明,它具有良好的选择渗透性、优异的抗污能力和更长的使用寿命,可同时实现多功能水净化和多基底防污涂层的涂覆。因此,本研究不仅为设计新型过滤器提供了一种高效、多功能、高抗污染的制备方法,还证实了本研究开发的宏微双仿生策略在复杂水处理中的应用前景。
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来源期刊
Frontiers of Environmental Science & Engineering
Frontiers of Environmental Science & Engineering ENGINEERING, ENVIRONMENTAL-ENVIRONMENTAL SCIENCES
CiteScore
10.90
自引率
12.50%
发文量
988
审稿时长
6.1 months
期刊介绍: Frontiers of Environmental Science & Engineering (FESE) is an international journal for researchers interested in a wide range of environmental disciplines. The journal''s aim is to advance and disseminate knowledge in all main branches of environmental science & engineering. The journal emphasizes papers in developing fields, as well as papers showing the interaction between environmental disciplines and other disciplines. FESE is a bi-monthly journal. Its peer-reviewed contents consist of a broad blend of reviews, research papers, policy analyses, short communications, and opinions. Nonscheduled “special issue” and "hot topic", including a review article followed by a couple of related research articles, are organized to publish novel contributions and breaking results on all aspects of environmental field.
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