Journal of the Taiwan Institute of Chemical Engineers ( IF 5.5 ) Pub Date : 2021-08-04 , DOI: 10.1016/j.jtice.2021.07.043 Le Geng 1 , Liang Song 1 , Lele Li 1 , Xinjian He 1 , Jian Li 1 , Peng Mu 1
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Background
Solar interface evaporation is considered to be a sustainable and environmentally friendly technology for obtaining fresh water from seawater. However, the preparation of photothermal conversion materials with excellent evaporation performance, good mechanical properties, and simple method for the solar interface evaporation still faces challenge.
Methods
Herein, we report the fabrication of ultralong polypyrrole nanotubes aerogel-based solar steam generator through one-pot oxidative self-polymerization of pyrrole monomer using methyl orange as template and ferric chloride as oxidant.
Significant findings
The as-prepared aerogel shows excellent elasticity, which can be compressed by 30% and recover to its original shape within a few seconds. In combination with abundant porosity (92.3%), low thermal conductivity (0.077 W m−1 K−1), super hydrophilic wettability and high light absorption (94%), the as-prepared aerogel shows a high solar-to-vapor efficiency above 74.5% even in high concentration saline (20%). This work provides new opportunities for effective design of conductive polymer-based photothermal monolithic materials with tunable porosity, adjustable morphology, required mechanical properties and high evaporation performance.
中文翻译：
具有优异弹性的超长聚吡咯纳米管气凝胶可有效产生太阳能蒸汽
背景
太阳能界面蒸发被认为是一种从海水中获取淡水的可持续且环保的技术。然而，制备具有优异蒸发性能、良好机械性能、太阳能界面蒸发方法简单的光热转换材料仍面临挑战。
方法
在此，我们报道了以甲基橙为模板，氯化铁为氧化剂，通过吡咯单体的一锅氧化自聚合制备超长聚吡咯纳米管气凝胶基太阳能蒸汽发生器。
重要发现
所制备的气凝胶显示出优异的弹性，可压缩 30% 并在几秒钟内恢复到原来的形状。结合丰富的孔隙率 (92.3%)、低热导率 (0.077 W m -1 K -1 )、超亲水润湿性和高光吸收 (94%)，所制备的气凝胶显示出高的太阳能-蒸汽效率即使在高浓度盐水 (20%) 中也高于 74.5%。这项工作为有效设计具有可调孔隙率、可调形态、所需机械性能和高蒸发性能的导电聚合物基光热单片材料提供了新的机会。
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