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Liquid-infused slippery surface performs better than superhydrophobic surface in long-term corrosion resistance

news100 by news100
September 10, 2021
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Liquid-infused slippery surface performs better than superhydrophobic surface in long-term corrosion resistance
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Graphical abstract. Credit: DOI: 10.1021/acs.langmuir.1c01684

The intrinsic hydrophilicity, liquid adhesion, surface contamination, corrosion attack, and ice over phenomena of metallic materials greatly restrict their wide utilizations.


Given the unique interfacial phase contacts and water repellency properties, Lotus leaf-inspired superhydrophobic surface and Pitcher plant-inspired liquid-infused slippery surface are promising candidates for multi-functional applications. But which of the two surfaces performs better remains unclear.

Recently, Associate Professor Zhang Binbin from the research team led by Prof. Duan Jizhou at the Institute of Oceanology of the Chinese Academy of Sciences (IOCAS) systematically compared the superhydrophobic and liquid-infused slippery surfaces with special wettability.

This study was published in Langmuir on Sept. 7.

The researchers prepared superhydrophobic and lubricant-infused ultraslippery surfaces through chemical etching, low surface energy molecule grafting, and lubricant oil infusion. Then they compared the surface wettability, self-cleaning, anti-icing, anticorrosion behaviors, and mechanical durability to study the functional differences and mechanisms.

They found that both superhydrophobic and lubricant-infused ultraslippery surfaces exhibited evident self-cleaning ability, ice over delay effect, marked decrease in the ice adhesion strength and distinct increase in charge-transfer resistance.

‘”Most notably, given the existence of a stable, defect-free, and inert lubricant-infused layer, the lubricant-infused ultraslippery surfaces possess superior mechanical robustness against abrasion/knife scratching damage and better long-term corrosion resistance,”‘ said Zhang.


A novel salvinia-like slippery surface


More information:
Binbin Zhang et al, Comparison Study of Self-Cleaning, Anti-Icing, and Durable Corrosion Resistance of Superhydrophobic and Lubricant-Infused Ultraslippery Surfaces, Langmuir (2021). DOI: 10.1021/acs.langmuir.1c01684

Provided by
Chinese Academy of Sciences

Citation:
Liquid-infused slippery surface performs better than superhydrophobic surface in long-term corrosion resistance (2021, September 10)
retrieved 11 September 2021
from https://phys.org/news/2021-09-liquid-infused-slippery-surface-superhydrophobic-long-term.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.





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