Renewable, All-Natural Flute Membrane with Excellent Mechanical Properties for Osmotic Energy Harvesting

被引：0
|
作者：
Zheng, Xue [1 ]
Jia, Mingming [2 ]
Yuan, Zhenbo [1 ]
Ma, Xiaoyan [3 ]
Teng, Chao [1 ]
Kong, Biao [4 ]
机构：
[1] College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao,266042, China
[2] College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao,266042, China
[3] College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao,266042, China
[4] Department of Chemistry, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai,200438, China
来源：
ACS Applied Materials and Interfaces | 2024年 / 16卷 / 51期
关键词：
Ion-selective membranes serve as key materials for reverse electrodialysis (RED) technology in osmotic energy harvesting; and the search for a class of membranes that are economical; highly robust; and sustainable has been a relentless goal for researchers. In this work; all-natural biomass membranes (reed membranes) are often used as a flute diaphragm; which makes the flute produce a brighter and crisper sound; presenting high strength and elasticity. Ultrathin natural reed membranes (thickness of ≈4.06 μm) were selected as representative materials due to their impressive mechanical properties with a top-level combination of yield strength (≈63.5 MPa) and strain (∼2%) among all reported natural materials. More importantly; there are numerous nanoscale pores and negatively charged −OH groups on the reed surface; providing tiny nanofluidic channels for efficient cation transmembrane transport; which endow the flute membrane with excellent selectivity for caution and stable salinity-gradient energy conversion performance. The reed membrane delivers excellent osmotic energy conversion performance with a power output density of 22.2 W m-2 in 500-fold NaCl concentration as well as high stability (power density maintained at 98.53% for more than 6000 s). This work provides a strategy for all-natural ion-selective membranes in terms of economy; fabrication simplicity; and stability; which has potential utility in various applications such as osmotic energy harvesting. © 2024 American Chemical Society;
D O I：
10.1021/acsami.4c17932
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页码：70618 / 70625
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