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Simple Hierarchical Interface Design Strategy for Accelerating Solar Evaporation
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2020-12-10 , DOI: 10.1002/mame.202000640 Shuai Li 1 , Yingying He 1 , Yanan Wang 1 , Daogui Liao 1 , Hongxia Liu 1 , Li Zhou 1 , Chun Wei 1 , Chuanbai Yu 1 , Yunhua Chen 2
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2020-12-10 , DOI: 10.1002/mame.202000640 Shuai Li 1 , Yingying He 1 , Yanan Wang 1 , Daogui Liao 1 , Hongxia Liu 1 , Li Zhou 1 , Chun Wei 1 , Chuanbai Yu 1 , Yunhua Chen 2
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Interface design is an efficient way to improve the steam generation performance of solar evaporators. Accompanied with the formation of cellulose nanofiber/polylactic acid/polyaniline (PANI) hybrid aerogel (HA) by Pickering emulsion and in situ polymerization, this paper proposes a new perspective of hierarchical interface design strategy to accelerate the water evaporation driven by solar energy. By changing the concentration and type of doped acid, the distribution gap of different PANI forms in HA can be microscopically designed. PANI nanoclusters with smaller gaps facilitate HA to achieve an improved light absorption, photothermal conversion capability and steam generation rate. Moreover, macro interface design introduces hemispherical depression structures to the HA surface through a simple mold. These recessed surfaces not only increase the light absorption by increasing the multiple reflections and refractions of light on the recesses, but also recover part of the heat radiation loss to the environment. A higher evaporation rate of 1.65 kg m−2 h−1 with a steam generation efficiency of 94.6% is achieved under the irradiation of 1 Sun (100 mw cm−2). Finally, HAs have strong purification ability for various raw water, and are promising in terms of their application potential in the field of energy conversion.
中文翻译：
加速太阳蒸发的简单分层接口设计策略
界面设计是提高太阳能蒸发器蒸汽产生性能的有效方法。伴随着Pickering乳液和原位聚合形成纤维素纳米纤维/聚乳酸/聚苯胺（PANI）混合气凝胶（HA），本文提出了分层界面设计策略的新观点，以加速太阳能驱动的水蒸发。通过改变掺杂酸的浓度和类型，可以微观设计HA中不同PANI形式的分布间隙。具有较小间隙的PANI纳米簇有助于HA改善光吸收，光热转化能力和蒸汽产生速率。此外，宏界面设计通过简单的模具将半球形凹陷结构引入HA表面。这些凹入的表面不仅通过增加凹部上的光的多次反射和折射来增加光吸收，而且还恢复了对环境的部分热辐射损失。更高的蒸发速率1.65 kg m在1 Sun（100 mw cm -2）的辐照下，蒸汽产生效率为94.6％的-2 h -1。最后，HA对各种原水具有很强的净化能力，就其在能量转换领域的应用潜力而言，它们是有前途的。
更新日期：2020-12-10
中文翻译：
加速太阳蒸发的简单分层接口设计策略
界面设计是提高太阳能蒸发器蒸汽产生性能的有效方法。伴随着Pickering乳液和原位聚合形成纤维素纳米纤维/聚乳酸/聚苯胺（PANI）混合气凝胶（HA），本文提出了分层界面设计策略的新观点，以加速太阳能驱动的水蒸发。通过改变掺杂酸的浓度和类型，可以微观设计HA中不同PANI形式的分布间隙。具有较小间隙的PANI纳米簇有助于HA改善光吸收，光热转化能力和蒸汽产生速率。此外，宏界面设计通过简单的模具将半球形凹陷结构引入HA表面。这些凹入的表面不仅通过增加凹部上的光的多次反射和折射来增加光吸收，而且还恢复了对环境的部分热辐射损失。更高的蒸发速率1.65 kg m在1 Sun（100 mw cm -2）的辐照下，蒸汽产生效率为94.6％的-2 h -1。最后，HA对各种原水具有很强的净化能力，就其在能量转换领域的应用潜力而言，它们是有前途的。
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