DataVXAdvanced Functional MaterialsPaper
journal article·2025-03Open access

Anti‐Swelling 3D Nanohydrogel for Efficient Osmotic Energy Conversion

Cuncai Lin, Wenkai Jia, Leqi Chang, Guijing Ren, Shuhong Hu, Xin Sui, Longcheng Gao, Kunyan Sui, Lei Jiang

Advanced Functional Materials· Volume 35· Issue 10
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Source abstract

Abstract

Abstract Osmotic energy conversion based on reverse electrodialysis (RED) technology has attracted intense attention. As the key component, the ion‐selective membranes should meet the basic requirements of high power density, high mechanical strength, and easy preparation. Polyelectrolyte hydrogel materials are good candidates, due to their high charge density. However, the severe swelling effect decreases the ion selectivity and mechanical strength. To solve this problem, an anti‐swelling 3D nanohydrogel is demonstrated, which is in situ polymerized in the nanoporous polyimide (PI) membrane, exhibiting ultrahigh power density in osmotic energy conversion. Because of the nano‐confinement of the PI matrix, the swelling ratio of the nanohydrogel decreases to 37.5% from 593.2% of the bulk hydrogel. Meanwhile, the hybrid membrane exhibits excellent mechanical strength (≈89.5 MPa). Under a 500‐fold concentration gradient, the nanohydrogel generates a power density of up to 48.5 W m−2, one order of magnitude higher than that of the bulk hydrogel. The anti‐swelling 3D nanohydrogel introduces a new concept in designing separation membranes for osmotic energy conversion.
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Research context

PolymersNanomaterials

OpenAlex topics: Solar-Powered Water Purification Methods · Advanced Sensor and Energy Harvesting Materials · Nanopore and Nanochannel Transport Studies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Bio‐Fiber and Eco‐textiles, College of Materials Science and Engineering, Key Laboratory of Shandong Provincial Universities for Advanced Fibers and Composites Qingdao University Qingdao 266071 P. R. China

Laboratory of Bio‐Inspired Smart Interfacial Science and Technology of Ministry of Education, Key Laboratory of Beijing Energy, School of Chemistry and Environment Beihang University Beijing 100191 P. R. China

Laboratory of Bio‐Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry Beihang University Beijing 100191 P. R. China

Key Laboratory of Bio‐inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Shandong Province · Taishan Scholar Foundation of Shandong Province

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