Nanopore Functionalized by Highly Charged Hydrogels for Osmotic Energy Harvesting
Nanopore Functionalized by Highly Charged Hydrogels for Osmotic Energy Harvesting
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DOI：
10.1021/acsami.9b01768
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发表时间：
2019-04-03
影响因子：
9.5
通讯作者：
Balme, Sebastien
中科院分区：
文献类型：
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作者：
Ma, Tianji;Balanzat, Emmanuel;Balme, Sebastien
盐水和淡水之间的盐度梯度是一种丰富的能量来源，可以通过两种主要的膜方法获得：压力延迟渗透和反向电渗析。目前，后一种技术已接近真实的应用，但仍存在功率产额低的问题。低膜选择性和复杂的膜制造是主要的限制因素。为了改善这一点，我们设计了一对夫妇的离子选择性膜的基础上的轨道蚀刻聚合物纳米孔功能化的高电荷水凝胶。比较两种纳米孔几何形状（圆柱形和圆锥形）以产生具有凝胶功能的渗透能，并且更重要的是可以按比例放大。从单个纳米孔和多孔膜到堆叠膜的实验显示了从离子传输到能量产生的完整表征以及从单个孔到堆叠膜的明确关系。在实际的实验条件下，在pH 7的功率密度为0.37 W m-2。通过改善离子轨道和减少膜间距离，它可以成为工业应用的良好候选者。
The salinity gradient between brine and fresh water is an abundant source of power which can be harvested by two major membrane methods: pressure-retarded osmosis and reversed electrodialysis. Nowadays, the latter technology is close to real application, but it still suffers from low power yield. Low membrane selectivity and complex membrane fabrication are the main limiting factors. To improve that, we design a couple of ion-selective membranes based on the track-etched polymer nanopore functionalized by highly charged hydrogels. Two nanopore geometries are compared (cylindrical and conical shape) to generate osmotic energy with gel functions and more importantly can be scaled up. Experiments from the single nanopore and multipore membrane to stacked membranes show complete characterization from ionic transportation to energy generation and a clear relationship from the single pore to stacked membranes. In the actual experiment conditions, a power density of 0.37 W m-2 at pH 7 was achieved. By improving ionic tracks and reducing intermembrane distances, it can be a good candidate for industrial applications.