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Spray Assembly of Metal-Phenolic Networks: Formation, Growth, and Applications
Qi-Zhi Zhong1, Shuaijun Pan1, Md Arifur Rahim1
1ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering , The University of Melbourne , Parkville , Victoria 3010 , Australia.
ACS Applied Materials & Interfaces
|September 22, 2018
Summary
Spray assembly enables fabrication of metal-phenolic network (MPN) coatings for diverse applications. Process variables control film properties, leading to superhydrophilic membranes and UV-shielding films.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Metal-phenolic networks (MPNs) are hybrid conformal coatings formed via coordination-driven assembly of phenolic ligands and metal ions.
- Traditional fabrication methods (solution immersion) are limited to small or flexible substrates.
- Industrial-scale coating of large substrates using spray assembly requires further investigation of process variable effects on MPN growth.
Purpose of the Study:
- To develop and explore a spray assembly method for fabricating metal-phenolic network (MPN) coatings.
- To investigate the influence of various process parameters on MPN formation and patterning.
- To demonstrate the application of spray-assembled MPNs in functional materials.
Main Methods:
- Utilized a spray assembly technique to deposit MPN coatings using diverse phenolic building blocks and metal ions.
- Systematically varied process parameters, including solvent, pH, and metal-ligand combinations.
- Analyzed film properties such as thickness and roughness to understand MPN growth mechanisms.
Main Results:
- Demonstrated control over MPN film thickness and roughness by adjusting solvent, pH, and metal-ligand pairs.
- Proposed a formation pathway for spray-assembled MPN films, correlating bis complex formation with thicker coatings.
- Successfully fabricated superhydrophilic membranes for oil-water separation and colorless films for UV shielding.
Conclusions:
- Spray assembly is a viable method for fabricating tunable MPN coatings on various substrates.
- Understanding the coordination chemistry (mono-, bis-, tris-complexes) is crucial for controlling MPN film properties.
- Spray-assembled MPNs offer a promising route for developing advanced multifunctional hybrid materials for diverse applications.
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