A novel photothermal, self-healing and anti-reflection water evaporation membrane,Soft Matter

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A novel photothermal, self-healing and anti-reflection water evaporation membrane
Soft Matter ( IF 2.9 ) Pub Date : 2021-4-7 , DOI: 10.1039/d1sm00030f
Hao Sun _{1,

2,

3,

4,

5} , Xin Li _{1,

2,

3,

4,

5} , Jun Chen _{1,

2,

3,

4,

5} , Haiyan Zhu _{1,

2,

3,

4,

5} , Hongyan Miao _{1,

2,

3,

4,

5} , Ying Li _{1,

2,

3,

4,

5} , Xuefeng Liu _{1,

2,

3,

4,

5} , Gang Shi _{1,

2,

3,

4,

5}

Affiliation

For the solar water evaporation system, there are no reports on the self-healing support, which is crucial for the sustainable use of solar evaporation membrane. In this work, a self-healing hydrogel is prepared via free radical copolymerization with covalent cross-linking and coordination cross-linking and is used as a photothermal water evaporation support. The photothermal material is then introduced into the hydrogel by physically doping acetylene carbon black. At the same time, inverted micro-pyramids are fabricated on the surface of the hydrogel by soft imprint to increase the utilization efficiency of incident light. The water evaporation rate of the composite membrane can reach 1.58 kg m⁻² h⁻¹, and the breaking elongation is 1580%. It can self-heal after it is completely broken, and can still be stretched 3 times its original length. The design of this self-healing photothermal membrane will provide a new idea for its application in a harsh outdoor environment.

中文翻译：

新型光热，自修复和抗反射水蒸发膜

对于太阳能蒸发系统，没有关于自愈支持的报道，这对于可持续利用太阳蒸发膜至关重要。在这项工作中，通过具有共价交联和配位交联的自由基共聚反应制备了一种自修复水凝胶，并将其用作光热水蒸发载体。然后通过物理掺杂乙炔炭黑将光热材料引入水凝胶。同时，通过软压印在水凝胶的表面上制备了倒置的微型金字塔，以提高入射光的利用效率。复合膜的水蒸发速率可达到1.58 kg m ^-2 h ^-1，断裂伸长率为1580％。完全断裂后可以自我修复，仍然可以拉伸到其原始长度的3倍。这种自我修复的光热膜的设计将为在恶劣的室外环境中应用提供新的思路。

更新日期：2021-04-16

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