Underwater mechanically robust oil-repellent materials: combining conflicting properties using a heterostructure

Xiangfu Meng, Miaomiao Wang, Liping Heng, Lei Jiang

Research output: Contribution to journalArticleResearchpeer-review

38 Citations (Scopus)

Abstract

The development of underwater mechanically robust oil-repellent materials is important due to the high demand for these materials with the increase in underwater activities. Based on the previous study, a new strategy is demonstrated to prepare underwater mechanically robust oil-repellent materials by combining conflicting properties using a heterostructure, which has a layered hydrophobic interior structure with a columnar hierarchical micro/nanostructure on the surface and a hydrophilic outer structure. The surface hydrophilic layer imparts underwater superoleophobicity and low oil adhesion to the material, which has oil contact angle of larger than 150° and adhesion of lower than 2.8 µN. The stability of the mechanical properties stemming from the interior hydrophobic-layered structure enables the material to withstand high weight loads underwater. The tensile stress and the hardness of such a heterostructure film after 1 month immersion in seawater and pH solution are in the range from 83.92 ± 8.22 to 86.73 ± 7.8 MPa and from 83.88 ± 6.8 to 86.82 ± 5.64 MPa, respectively, which are superior to any underwater oil-repellent material currently reported.

Original languageEnglish
Article number1706634
Number of pages8
JournalAdvanced Materials
Volume30
Issue number11
DOIs
Publication statusPublished - 15 Mar 2018
Externally publishedYes

Keywords

  • heterostructures
  • layer structures
  • low adhesion
  • underwater mechanical stability
  • underwater superoleophobicity

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