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Crude-Oil-Repellent Membranes by Atomic Layer Deposition: Oxide Interface Engineering
Hao-Cheng Yang1, Yunsong Xie2, Henry Chan1
1Center for Nanoscale Materials , Argonne National Laboratory , Lemont , Illinois 60439 , United States.
ACS Nano
|August 15, 2018
Summary
Nanosized oxide coatings on membranes significantly reduce crude oil fouling, a major issue in water treatment and oil spill cleanup. This easy fabrication method enhances membrane performance without complex structures.
Area of Science:
- Materials Science
- Surface Chemistry
- Environmental Engineering
Background:
- Crude oil fouling on membranes hinders oil spill remediation and wastewater treatment.
- Developing effective anti-fouling strategies is crucial for membrane performance.
Purpose of the Study:
- To investigate the impact of nanosized oxide coatings on membrane anti-crude-oil properties.
- To develop a facile strategy for fabricating crude-oil-resistant membranes.
Main Methods:
- Atomic layer deposition (ALD) of thin (∼10 nm) oxide coatings (TiO2, SnO2, ZnO, Al2O3) on polymer membranes.
- Evaluation of anti-crude-oil performance of coated membranes.
- Molecular dynamics simulations to understand the role of hydration layers.
Main Results:
- TiO2- and SnO2-coated membranes showed superior anti-crude-oil performance compared to ZnO- and Al2O3-coated ones.
- Nanosized oxide coatings effectively mitigated crude oil adhesion and fouling.
- Molecular dynamics simulations revealed that tightly bound hydration layers are key to surface protection.
Conclusions:
- Nanosized oxide coatings offer a simple and effective method to create crude-oil-resistant membranes.
- Excellent crude oil resistance can be achieved without complex membrane architectures.
- This approach has significant implications for oil spill remediation and wastewater treatment.
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