Diverse wettability of superoleophilicity and superoleophobicity for oil spill cleanup and recycling

Mengya Xu, Gang Wang*, Zhixiang Zeng, Junjun Chen, Xingyuan Zhang, Longsheng Wang, Weiguang Song, Qunji Xue

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

8 Citations (Scopus)

Abstract

The frequent marine oil spill accidents in nowadays has aroused great attention all over the world. Lots of superwetting absorption materials with 2D or 3D structures are fabricated to efficiently remove oil spill, but the desorption of the absorbed oil is more difficult. Oil contaminants adhere on the surface will decline the performance and reusability of the absorption materials. Discarding or burning them will bring secondary pollution. Faced with these problems, we prepared an oil extractor integrated by a superhydrophobic-superoleophilic stainless steels wire mesh and a 3D porous cellulose sponge with superhydrophilicity-superoleophilicity in air and superoleophobicity in water. The oil extractor can in situ collect oil spill no matter on the water or under the water. More importantly, it is good at underwater oil desorption, which ensure the recovery and reuse of oil, and meanwhile avoid the materials being fouled by oils. More than 85.5% of crude oil could be successfully discharged only in 2 min when the oil-contaminated sponge was placed in water. The findings in this work not only put forward a new strategy for collection and reuse of various “oils”, but also offer a facile method to achieve a combination of two kinds of materials with diverse wettability.

Original languageEnglish
Pages (from-to)1158-1166
Number of pages9
JournalApplied Surface Science
Volume426
Early online date25 Jul 2017
DOIs
Publication statusPublished - 31 Dec 2017

Keywords

  • Cellulose sponge
  • Oil recovery
  • Self-cleaning
  • Stainless steels wire mesh
  • Superhydrophobicity
  • Superoleophilicity
  • Underwater superoleophobicity

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