Cao Xiaoyin, Zhang Jia, Zhou Jiaxuan, Jiao Rui, Zhang Min, Sun Hanxue, Li Jiyan, Liang Weidong, Li An
Department of Chemical Engineering, School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China.
Gansu Dongfang Titanium Co., LTD, High-tech Industrial Park 501, Nanhuan Road, Baiyin 730900, PR China.
J Colloid Interface Sci. 2024 May 15;662:367-376. doi: 10.1016/j.jcis.2024.02.096. Epub 2024 Feb 13.
The development and preparation of multifunctional photothermal conversion materials has far-reaching significance for the utilization of solar energy resources in response to the energy crisis. Herein, we propose a Janus membrane for interfacial solar evaporation and phase change energy storage. The membranes were fabricated via combining the PVA film with multi-shelled hollow spheres (MHS). The membranes have asymmetric wettability, that is, one side is hydrophilic and the other side is hydrophobic. The as-resulted membranes obtain outstanding light absorption without further processing. According to these two advantages, the membranes were applied to solar evaporation. The evaporation rate of the membrane is 1.41 kg*mh and the evaporation efficiency is 92.4 % under 1sun irradiation. Moreover, the membrane prepared by impregnating 1-Hexadecanamine (HDA) into MHS possesses excellent tensile strength (2.21 MPa) and photothermal conversion ability. The light-to-thermal conversion efficiency can reach 81.9 % under 1sun irradiation. Therefore, the membranes have broad application prospects in the field of photothermal conversion.
多功能光热转换材料的开发与制备对于应对能源危机、利用太阳能资源具有深远意义。在此，我们提出一种用于界面太阳能蒸发和相变储能的Janus膜。该膜通过将聚乙烯醇（PVA）薄膜与多壳空心球（MHS）相结合制备而成。这些膜具有不对称润湿性，即一侧亲水，另一侧疏水。所得膜无需进一步处理即可获得出色的光吸收性能。基于这两个优点，这些膜被应用于太阳能蒸发。在1个太阳光照下，该膜的蒸发速率为1.41 kg·m⁻²·h⁻¹，蒸发效率为92.4%。此外，通过将1-十六胺（HDA）浸渍到MHS中制备的膜具有出色的拉伸强度（2.21 MPa）和光热转换能力。在1个太阳光照下，光热转换效率可达81.9%。因此，这些膜在光热转换领域具有广阔的应用前景。
