A novel floatable composite hydrogel for solar evaporation enhancement,Environmental Science: Water Research & Technology

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A novel floatable composite hydrogel for solar evaporation enhancement
Environmental Science: Water Research & Technology ( IF 3.5 ) Pub Date : 2019-11-15 , DOI: 10.1039/c9ew00661c
Liyuan Zhao _{1,

2,

3,

4} , Jing Tian _{2,

3,

4,

5} , Yangkaixi Liu _{1,

2,

3,

4} , Longquan Xu _{2,

3,

4,

6} , Yi Wang _{2,

3,

4,

5} , Xu Fei _{1,

2,

3,

4,

6} , Yao Li _{1,

2,

3,

4}

Affiliation

Solar evaporation is an economically feasible method for desalination and distillation. Herein, we report a facile method to synthesize a floatable composite hydrogel with squid ink nanoparticles, silica aerogel, poly(vinyl alcohol) and acrylamide. Squid ink nanoparticles have good photothermal conversion efficiency. The silica aerogel can effectively reduce the density of the hydrogel and allow the composite hydrogel to float on the water surface. The good hydrophilicity of the hydrogel facilitates the transport of water molecules from the bottom to the top of the floatable composite hydrogel. In the evaporation process, these properties enable the floatable composite hydrogel to centrally heat the surface of the water, thus improving the water evaporation efficiency. The results of the evaporation experiments showed that the seawater evaporation rate of the floatable composite hydrogel was 4.73 times higher than that of the traditional process. Furthermore, the good mechanical strength and flexibility of the hydrogel provide a guarantee for its recovery and reuse in practical applications. This low-consumption, easy-to-manufacture and durable floatable composite hydrogel provides a new way for solar desalination.

中文翻译：

一种新型的可漂浮复合水凝胶，用于增强太阳蒸发

太阳蒸发是用于脱盐和蒸馏的经济上可行的方法。在这里，我们报告了一种简便的方法来合成具有鱿鱼墨水纳米颗粒，二氧化硅气凝胶，聚乙烯醇和丙烯酰胺的可漂浮复合水凝胶。鱿鱼墨纳米粒子具有良好的光热转换效率。二氧化硅气凝胶可有效降低水凝胶的密度，并使复合水凝胶漂浮在水表面。水凝胶的良好亲水性促进了水分子从可漂浮复合水凝胶的底部到顶部的运输。在蒸发过程中，这些特性使可漂浮的复合水凝胶能够集中加热水的表面，从而提高了水的蒸发效率。蒸发实验结果表明，可浮复合水凝胶的海水蒸发速率是传统工艺的4.73倍。此外，水凝胶的良好机械强度和柔韧性为其在实际应用中的回收和再利用提供了保证。这种低消耗，易于制造和耐用的可漂浮复合水凝胶为太阳能淡化提供了新途径。

更新日期：2019-11-15

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