Melt Electrospun Reduced Tungsten Oxide/Polylactic Acid Fiber Membranes as a Photothermal Material for Light-Driven Interfacial Water Evaporation
Melt Electrospun Reduced Tungsten Oxide/Polylactic Acid Fiber Membranes as a Photothermal Material for Light-Driven Interfacial Water Evaporation
复制标题
熔融静电纺还原氧化钨/聚乳酸纤维膜用于光驱动界面水蒸发的光热材料
DOI：
10.1021/acsami.8b07434
复制
发表时间：
2018-08-29
影响因子：
9.5
通讯作者：
Guo, Zhen-Lin
中科院分区：
文献类型：
--
作者：
Chala, Tolesa Fita;Wu, Chang-Mou;Guo, Zhen-Lin
开发高效的光热材料是太阳能蒸发水的关键。在这项工作中，熔融静电纺丝还原氧化钨/聚乳酸（WO 2. 72/PLA）纤维膜成功地制备了改善的近红外（NIR）光热转换性能，由于强大的近红外光吸收的金属氧化物。通过熔融加工将WO2.72粉末纳米颗粒掺入PLA基质中，然后使用单螺杆挤出机将复合材料挤出成线。随后，通过熔融静电纺丝从WO2.72/PLA复合材料的挤出丝制备纤维膜，这是一种具有成本效益的技术，可以在不添加对环境不友好的化学品的情况下生产纤维膜。熔融静电纺WO2.72/PLA纤维膜，漂浮在水面上，由于表面疏水性，系统地设计，并应用于，蒸汽发生的基础上，太阳能加热的界面概念。当纳米WO2.72含量为7wt%时，水的蒸发效率达到81.39%，高于纯PLA纤维膜和本体水的蒸发效率。因此，这项工作有助于开发新型光热纤维膜，以提高光驱动水蒸发性能，在水处理和海水淡化领域的潜在应用。
The development of efficient photothermal materials is the most important issue in solar water evaporation. In this work, melt electrospun reduced tungsten oxide/polylactic acid (WO2.72/PLA) fiber membranes were successfully prepared with improved near-infrared (NIR) photothermal conversion properties owing to strong NIR photoabsorption by the metal oxide. WO2.72 powder nanoparticles were incorporated into PLA matrix by melt processing, following which the composites were extruded into wires using a single screw extruder. Subsequently, fiber membranes were prepared from the extruded wire of the WO2.72/PLA composite by melt electrospinning, which is a cost-effective technique that can produce fiber membranes without the addition of environmentally unfriendly chemicals. The melt electrospun WO2.72/PLA fiber membranes, floatable on water due to surface hydrophobicity, were systematically designed for, and applied to, vapor generation based on the interfacial concept of solar heating. With the photothermal WO2.72/PLA fiber membrane containing 7 wt % WO2.72 nanoparticles, the water evaporation efficiency was reached 81.39%, which is higher than that for the pure PLA fiber membrane and bulk water. Thus, this work contributes to the development of novel photothermal fiber membranes in order to enhance light-driven water evaporation performance for potential applications in the fields of water treatment and desalination.