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Heterogeneous Network SLIPS Coating with Soft-Hard Chain Integration Design for Marine Antifouling Engineering.

Xuerui Zang1, Haibin Zhao1,2,3, Jiawei Li4

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Advanced Materials (Deerfield Beach, Fla.)
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Summary

This study developed a durable, self-healing slippery liquid-infused porous surface (SLIPS) coating for marine environments. The advanced antifouling coating effectively repels biofouling and oil, ensuring reliable ocean monitoring systems.

Keywords:
SLIPS coatingsheterogeneous networkmarine antifoulingwear resistance

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Marine Engineering

Background:

  • Developing durable antifouling coatings is crucial for marine monitoring systems operating in complex environments.
  • Existing coatings often lack long-term efficacy or mechanical robustness.
  • Slippery Liquid-Infused Porous Surfaces (SLIPS) offer a promising approach but require further optimization for durability and self-healing.

Purpose of the Study:

  • To engineer a heterogeneous-network SLIPS coating with enhanced durability and self-healing properties.
  • To investigate the role of molecular design in controlling coating performance and antifouling activity.
  • To evaluate the coating's effectiveness against diverse fouling agents and its long-term stability in real marine conditions.

Main Methods:

  • Fabrication of a SLIPS coating using a rigid framework (POSS-(SH)8 and F13-LNBR) and a soft network (THDI and UPy).
  • Infusion with silicone oil and characterization of mechanical strength (erosion rate) and self-healing capabilities.
  • Tuning surface properties by varying UPy units and perfluoroacrylate monomers to control oil release and hydrophobicity.
  • Performance evaluation through fouling tests with bacteria, algae, and crude oil, followed by a 90-day marine field test.

Main Results:

  • The engineered SLIPS coating demonstrated robust mechanical strength with a low erosion rate (74.37 nm/s).
  • The coating exhibited autonomous self-healing properties in both aerial and underwater conditions.
  • Precisely controlled silicone oil release and surface hydrophobicity were achieved through tailored molecular design.
  • The coating effectively repelled bacteria, algae, and crude oil, maintaining flexibility and wear resistance.
  • A 90-day field test showed minimal transmittance decrease (5.8%), indicating excellent long-term antifouling performance.

Conclusions:

  • The heterogeneous-network SLIPS coating offers a synergistic approach to overcome limitations of current antifouling technologies.
  • The molecular design strategy enables tunable properties for robust and long-lasting antifouling in challenging marine environments.
  • This advanced coating presents a viable solution for enhancing the reliability of ocean monitoring systems.