Preparation and Application of ZIF-8 Thin Layers

Herein we compare various preparation methods for thin ZIF-8 layers on a Cu substrate for application as a host material for omniphobic lubricant-infused surfaces. Such omniphobic surfaces can be used in thermal engineering applications, for example to achieve dropwise condensation or anti-fouling a...

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Bibliographic Details
Published in:Applied sciences 2021-05, Vol.11 (9), p.4041
Main Authors: Schernikau, Martin, Sablowski, Jakob, Gonzalez Martinez, Ignacio Guillermo, Unz, Simon, Kaskel, Stefan, Mikhailova, Daria
Format: Article
Language:English
Subjects:
anodic dissolution
Antifouling substances
Condensates
Contact angle
Deicing
electrochemical synthesis
Electrochemistry
Electrodes
Electrolytes
Floods
Heat exchangers
liquid infused porous surfaces (LIPS)
Lubricants
metal–organic framework (MOF)
omniphobic surface
Pore size
Substrates
Surface properties
Thermal engineering
Thin films
Wettability
Zinc
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Summary:Herein we compare various preparation methods for thin ZIF-8 layers on a Cu substrate for application as a host material for omniphobic lubricant-infused surfaces. Such omniphobic surfaces can be used in thermal engineering applications, for example to achieve dropwise condensation or anti-fouling and anti-icing surface properties. For these applications, a thin, conformal, homogeneous, mechanically and chemically stable coating is essential. In this study, thin ZIF-8 layers were deposited on a Cu substrate by different routes, such as (i) electrochemical anodic deposition on a Zn-covered Cu substrate, (ii) doctor blade technique for preparation of a composite layer containing PVDF binder and ZIF-8, as well as (iii) doctor blade technique for preparation of a two-layer composite on the Cu substrate containing a PVDF-film and a ZIF-8 layer. The morphology and topography of the coatings were compared by using profilometry, XRD, SEM and TEM techniques. After infusion with a perfluorinated oil, the wettability of the surfaces was assessed by contact angle measurements, and advantages of each preparation method were discussed.
ISSN:2076-3417
2076-3417
DOI:10.3390/app11094041