A cellulose nanofibril/polylactic acid/polyaniline (CNF/PLA/PANI) hybrid aerogel was developed as an integrated self-floating device for solar steam generation. This hybrid aerogel with tunable structure and morphology was fabricated by lyophilizing CNF stabilized oil-in-water Pickering emulsion gel with PLA/dichloroethane droplets dispersed in an aqueous CNF dispersion, followed by in situ polymerization of aniline. Depending on the extremely low density of 0.03 g/cm³ and porosity of more than 94%, the hybrid aerogel can self-float on the water with good water transport capacity. The optimal CNF/PLA/PANI1-4 hybrid aerogel exhibits 97% light absorption across 300–2500 nm and appealing photothermal conversion capability with surface temperature up to approximately 105 °C under an irradiation of 1 sun. The CNF/PLA/PANI1-4 hybrid aerogel as a steam evaporation device demonstrates an evaporation rate of up to 1.58 kg m^–2 h^–1 and a steam generation efficiency of 90% at an irradiation of 1 sun. Moreover, the hybrid aerogel shows good cycle durability and structural stability and achieves high purification for saline, industrial wastewater, and organic dye wastewater. The green and sustainable hybrid aerogel demonstrates promising properties and great potential for practical seawater desalination and wastewater treatment.

中文翻译：

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纤维素纳米原纤稳定的Pickering乳液和原位聚合导致混合气凝胶，可高效产生太阳能蒸汽

纤维素纳米原纤维/聚乳酸/聚苯胺（CNF / PLA / PANI）混合气凝胶被开发为集成的自浮式设备，用于产生太阳能蒸汽。这种具有可调结构和形态的混合气凝胶是通过将CNF稳定的水包油Pickering乳液凝胶冻干，然后将PLA /二氯乙烷液滴分散在CNF水性分散液中，然后进行苯胺的原位聚合而制得的。取决于0.03 g / cm ³的极低密度混合气凝胶孔隙率超过94％，可以在水中自浮，具有良好的水传输能力。最佳的CNF / PLA / PANI1-4混合气凝胶在300到2500 nm范围内显示97％的光吸收，并具有吸引人的光热转换能力，在1个太阳照射下表面温度高达约105°C。CNF / PLA / PANI1-4混合气凝胶作为蒸汽蒸发装置，其蒸发速率高达1.58 kg m ^–2 h ^–11个太阳照射下的蒸汽产生效率为90％。此外，混合气凝胶显示出良好的循环耐久性和结构稳定性，并能对盐水，工业废水和有机染料废水进行高度净化。绿色和可持续的混合气凝胶显示出令人鼓舞的特性，并在实际的海水淡化和废水处理中具有巨大潜力。