Nature Sunflower Stalk Pith with Zwitterionic Hydrogel Coating for Highly Efficient and Sustainable Solar Evaporation,Advanced Functional Materials

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Nature Sunflower Stalk Pith with Zwitterionic Hydrogel Coating for Highly Efficient and Sustainable Solar Evaporation
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2021-10-27 , DOI: 10.1002/adfm.202108135
Xin Su _{1,

2} , Dezhao Hao ₃ , Mingyue Sun ₄ , Tingshu Wei ₂ , Dake Xu ₄ , Xicheng Ai ₁ , Xinglin Guo ₂ , Tong Zhao ₂ , Lei Jiang ₃

Affiliation

Solar-driven water evaporation is considered to be an appealing way to solve water scarcity issues globally. Various natural creatures possess unique structural features and exhibit an excellent pumping ability in arid environments. Motivated by sunflower stalk pith, here, the biomass porous foam modified with zwitterionic hydrogel coating for solar desalination devices is introduced. It is demonstrated that the multi-curvature and gradient honeycomb architecture offers a remarkable solar desalination system, which combines critical aspects of solar evaporation including high light absorption, localizing converted heat, rapid water transport, water activation, and multi-channel release of steam via its ubiquitous structure, and substantially outperforms other natural biomass materials. The device exhibits long-term stability in actual seawater, as well as high performance for soybean oil emulsion and oily brines (crude oil, salts). Furthermore, the long-term use of excellent storability to prevent putrefying is shown, which is attributed to the outstanding antifouling property of zwitterionic hydrogel. It is envisioned that the nature material with the advantage of being inexpensive, environmentally friendly, and portable, may be a new candidate for water purification and desalination.

中文翻译：

具有两性离子水凝胶涂层的自然向日葵茎髓，用于高效和可持续的太阳能蒸发

太阳能驱动的水蒸发被认为是解决全球水资源短缺问题的一种有吸引力的方式。各种自然生物具有独特的结构特征，在干旱环境中表现出极好的抽水能力。本文以向日葵茎髓为灵感，介绍了用于太阳能海水淡化装置的两性离子水凝胶涂层改性的生物质多孔泡沫。结果表明，多曲率和梯度蜂窝结构提供了一个卓越的太阳能淡化系统，它结合了太阳能蒸发的关键方面，包括高光吸收、局部转换热、快速水传输、水活化和多通道蒸汽释放。其无处不在的结构，并大大优于其他天然生物质材料。该装置在实际海水中表现出长期稳定性，以及大豆油乳液和含油盐水（原油、盐）的高性能。此外，由于两性离子水凝胶具有出色的防污性能，因此可以长期使用以防止腐败。可以预见，具有廉价、环保和便携优势的天然材料可能成为水净化和海水淡化的新候选者。

更新日期：2021-10-27

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