Stable superhydrophobic coatings from thiol-ligand nanocrystals and their application in oil/water separation
Stable superhydrophobic coatings from thiol-ligand nanocrystals and their application in oil/water separation
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DOI：
10.1039/c2jmo3093l
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发表时间：
2012-01-01
影响因子：
--
通讯作者：
Liu, Weimin
中科院分区：
文献类型：
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作者：
Li, Jing;Shi, Lei;Liu, Weimin
从硫醇配体纳米晶体成功获得了稳定的超疏水涂层。纳米晶体包括 VIII 和 IB 金属以及氧化物纳米颗粒，例如 Fe、Co、Ni、Cu 和 Ag。我们提出了一种简单且可用的方法，有利于超疏水纺织品和海绵的合成，其中纳米晶体和硫醇之间的相互作用在特殊润湿表面的形成中发挥着重要作用。同时，超疏水纺织品还可以被赋予新的功能。例如，带有 Fe3O4 纳米涂层的纺织品具有磁性，而 Ag 纳米晶体则具有抗菌作用。如果使用全氟烷基硫醇代替烷基硫醇，则改性后的表面从超亲油变为疏油。所提出的策略适用于现有方法中的各种纳米颗粒，包括在不同极性溶剂中的制备以及使用表面活性剂作为封端剂。所制备的超疏水纳米涂层对热水、表面活性剂水溶液和非极性溶剂中的超声波处理表现出良好的耐久性。超疏水和超亲油纳米涂层有效地应用于油/水分离。
Stable superhydrophobic coatings were successfully achieved from thiol-ligand nanocrystals. Nanocrystals included VIII and IB metals and oxide nanoparticles, such as Fe, Co, Ni, Cu and Ag. We present a simple and available method that facilitates the synthesis of superhydrophobic textiles and sponges, in which the interaction between the nanocrystals and thiol plays a significant role in the formation of a special wetting surface. Meanwhile, the superhydrophobic textiles could also be endowed with new functionalities. For example, textiles with Fe3O4 nanocoatings possess magnetic properties, and Ag nanocrystals provide an antibacterial effect. If perfluoroalkyl thiol was used to replace alkyl thiol, the as-modified surfaces became oleophobic from superoleophilic. The proposed strategy was fit for various nanoparticles from as-established methods, including the preparation in different polar solvents, and the usage of surfactants as capping agents. As-prepared superhydrophobic nanocoatings show good durability towards hot water, surfactant aqueous solutions, and ultrasonic treatment in nonpolar solvents. The superhydrophobic and superoleophilic nanocoatings were effectively used for application in oil/water separation.