We report the robust technique allowing manufacturing of superhydrophobic and oleophobic (omniphobic) surfaces with industrial grade low density polyethylene. The reported process includes two stages: (1) hot embossing of polyethylene with micro-scaled steel gauzes; (2) treatment of embossed surfaces with cold radiofrequency plasma of tetrafluoromethane. The reported surfaces demonstrate not only pronounced superhydrophobicity but also superoleophobicity. Superoleophobicity results from the hierarchical nano-scaled topography of fluorinated polyethylene surface. The observed superoleophobicity is strengthened by the hydrophobic recovery. The stability of the Cassie wetting regime was studied.
Bibliographical noteFunding Information:
We are grateful to Israel Ministry of Industry Trade & Labor (Comein Program) for the support of this research. We are thankful to Mrs. Natalya Litvak for SEM imaging of the reliefs and SEM/EDS study of the surfaces.
- Cassie wetting
- Cold plasma treatment
- Hydrophobic recovery