Liu Xue, Teng Rui, Fu Chenglong, Wang Ruiwen, Chen Zhijun, Li Wei, Liu Shouxin
Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China.
College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
ACS Appl Mater Interfaces. 2024 Jul 17;16(28):37111-37121. doi: 10.1021/acsami.4c08089. Epub 2024 Jul 5.
A fundamental challenge in artificial superhydrophobic papers is their poor resistance to mechanical abrasion, which limits their practical application in different fields. Herein, a robust and multifunctional superhydrophobic paper is successfully fabricated via a facile spraying method by combining silver nanowires and fluorinated titania nanoparticles through a common paper sizing agent (alkyl ketene dimer) onto paper. It is shown that the surface of the paper-based material presents a three-dimensional network structure due to the cross-linking of silver nanowires with a high aspect ratio. Further hydrophilic and hydrophobic performance test results show that it exhibits exceptional water repellency, with a desirable static contact angle of 165° and roll-off angle of 6.2°. The superhydrophobic paper showcases excellent mechanical durability and maintains its superhydrophobicity even after enduring 130 linear sandpaper abrasion cycles or high-velocity water jetting impact benefited from interfacial van der Waals and hydrogen bonding. Simultaneously, the robust superhydrophobic surface can effectively prevent the penetration of acid or alkali solutions, as well as UV light, resulting in excellent chemical stability. Additionally, the superhydrophobic paper offers supplementary features such as self-cleaning, electrical conductivity, and antibacterial capability. Further development of this strategy paves a way toward next-generation superhydrophobic paper composed of nanostructures and characterized by multiple (or additional) functionalities.
人造超疏水纸面临的一个基本挑战是其抗机械磨损能力较差，这限制了它们在不同领域的实际应用。在此，通过一种简便的喷涂方法，通过常见的纸张施胶剂（烷基烯酮二聚体）将银纳米线和氟化二氧化钛纳米颗粒结合到纸张上，成功制备了一种坚固且多功能的超疏水纸。结果表明，由于高纵横比的银纳米线交联，纸基材料的表面呈现出三维网络结构。进一步的亲水和疏水性能测试结果表明，它表现出优异的拒水性，具有理想的165°静态接触角和6.2°滚落角。这种超疏水纸具有出色的机械耐久性，即使在经受130次线性砂纸磨损循环或高速水喷射冲击后，由于界面范德华力和氢键作用，仍能保持其超疏水性。同时，坚固的超疏水表面可以有效防止酸或碱溶液以及紫外线的渗透，从而具有出色的化学稳定性。此外，这种超疏水纸还具有自清洁、导电和抗菌等附加功能。该策略的进一步发展为下一代由纳米结构组成并具有多种（或附加）功能的超疏水纸铺平了道路。
