Facile preparation of marine carrageenan hydrogel-coated steel mesh with superhydrophilic and underwater superoleophobic performance for highly efficient oil-water separation
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Summary
This summary is machine-generated.A novel biomimetic membrane from marine algae efficiently separates oil from water. This superhydrophilic, underwater superoleophobic material offers a reusable, eco-friendly solution for wastewater treatment with high oil-water separation efficiency.
Area Of Science
- Materials Science
- Environmental Science
- Chemical Engineering
Background
- Industrial wastewater and oil spills threaten ecosystems and health.
- Special wettability membranes offer efficient oil-water separation.
- Biomimetic superhydrophilic-underwater superoleophobic membranes are promising.
Purpose Of The Study
- To develop a novel membrane for efficient oil-water separation.
- To utilize a biocompatible and renewable hydrogel from marine red algae.
- To create a membrane inspired by biomimetic fish scales.
Main Methods
- Fabricated a membrane using a stainless steel mesh coated with carrageenan hydrogel.
- Utilized sodium periodate as a crosslinking agent for in-situ gelation.
- Characterized membrane properties including wettability, separation efficiency, and stability.
Main Results
- Achieved superhydrophilicity and underwater superoleophobicity (oil contact angle ≥ 158°).
- Demonstrated high separation efficiencies for various oils (97.98%–98.87%) and high water flux (1380.75 L/m²·h).
- Maintained efficiency over 20 cycles and showed stability in alkaline conditions.
Conclusions
- The carrageenan-based membrane is effective for oil-water separation.
- The biomimetic design offers excellent antifouling and self-cleaning properties.
- This renewable material is suitable for treating complex oily wastewater.
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