4.7 Article

Femtosecond laser ablated durable superhydrophobic PTFE films with micro-through-holes for oil/water separation: Separating oil from water and corrosive solutions

期刊

APPLIED SURFACE SCIENCE
卷 389, 期 -, 页码 1148-1155

出版社

ELSEVIER
DOI: 10.1016/j.apsusc.2016.07.075

关键词

Oil/water separation; Superhydrophobic; Femtosecond laser; Durability; PTFE

资金

  1. National Science Foundation of China [61275008, 51335008, 61475124]
  2. Special-funded programme on national key scientific instruments and equipment development of China [2012YQ12004706]
  3. Collaborative Innovation Center of Suzhou Nano Science and Technology
  4. International Joint Research Center for Micro/Nano Manufacturing and Measurement Technologies

向作者/读者索取更多资源

Separating the mixture of water and oil by the superhydrophobic porous materials has attracted increasing research interests; however, the surface microstructures and chemical composition of those materials are easily destroyed in a harsh environment, resulting in materials losing the superhydrophobicity as well as the oil/water separation function. In this paper, a kind of rough microstructures was formed on polytetrafluoroethylene (PTFE) sheet by femtosecond laser treatment. The rough surfaces showed durable superhydrophobicity and ultralow water adhesion even after storing in various harsh environment for along time, including strong acid, strong alkali, and high temperature. A micro-through-holes array was further generated on the rough superhydrophobic PTFE film by a subsequent mechanical drilling process. The resultant sample was successfully applied in the field of oil/water separation due to the inverse superhydrophobicity and superoleophilicity. The designed separation system is also very efficient to separate the mixtures of oil and corrosive acid/alkali solutions, exhibiting the strong potential for practical application. (C) 2016 Published by Elsevier B.V.

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