Liu Xudong, Li Shenzhen, Wu Yuanlong, Guo Tengfei, Xie Junhao, Tao Jinqiu, Dong Lei, Ran Qianping
School of Materials Science and Engineering, Southeast University, Nanjing 211189, China.
State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China.
ACS Appl Mater Interfaces. 2023 Sep 20;15(37):44305-44313. doi: 10.1021/acsami.3c09150. Epub 2023 Sep 12.
The compelling integration of superhydrophobic coatings with light-to-heat conversion capabilities has garnered substantial interest due to their dual functionality encompassing passive anti-icing and deicing attributes. However, the insufficient mechanical stability and the environmental and human health concerns stemming from the extensive use of organic solvents limit their practical application. In this study, an all-waterborne superhydrophobic photothermal coating (PCPAS) was prepared through the synergy of composite micro-nanoparticles derived from carbon nanotubes (CNT), polydopamine (PDA), and Ag particles with fluorine-containing polyacrylic emulsion (PFA). The PDA provided active sites for Ag reduction reaction and enhanced the interfacial interaction between CNT and Ag particles. The interfacial enhancement enabled the coating to maintain stable superhydrophobicity after 260 times sandpaper abrasion and 240 times tape peeling. Simultaneously, the composite micro-nanoparticle's light-to-heat conversion ability gave the coating excellent anti-icing/deicing capabilities. Under the condition of -20 °C, the freezing time of 30 μL of water droplets was extended to 392 s, and 2 × 2 × 2 cm ice cubes placed on the surface of the coating could completely melt after only 1142 s under simulated sunlight irradiation with a 1 kW/m intensity. In addition, the coating also had suitable self-cleaning properties and substrate applicability. The comprehensive attributes of this all-waterborne photothermal superhydrophobic coating render it a promising contender for anti-icing and deicing applications in challenging outdoor environments.
具有光热转换能力的超疏水涂层因其兼具被动防冰和除冰特性的双重功能而备受关注。然而，机械稳定性不足以及有机溶剂大量使用所引发的环境和人类健康问题限制了它们的实际应用。在本研究中，通过碳纳米管（CNT）、聚多巴胺（PDA）和银颗粒衍生的复合微纳米颗粒与含氟聚丙烯酸乳液（PFA）协同作用，制备了一种全水性超疏水光热涂层（PCPAS）。PDA为银还原反应提供活性位点，并增强了CNT与银颗粒之间的界面相互作用。这种界面增强使涂层在经过260次砂纸磨损和240次胶带剥离后仍能保持稳定的超疏水性。同时，复合微纳米颗粒的光热转换能力赋予涂层优异的防冰/除冰能力。在-20℃条件下，30μL水滴的冻结时间延长至392s，置于涂层表面的2×2×2cm冰块在强度为1kW/m的模拟阳光照射下仅1142s后就能完全融化。此外，该涂层还具有合适的自清洁性能和基材适用性。这种全水性光热超疏水涂层的综合特性使其成为具有挑战性的户外环境中防冰和除冰应用颇具潜力的候选材料。
