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Novel approach for the preparation of a highly hydrophobic coating material exhibiting self-healing properties

  • A concept to prepare a highly hydrophobic composite with self-healing properties has been designed and verified. The new material is based on a composite of a crystalline hydrophobic fluoro wax, synthesized from montan waxes and perfluoroethylene alcohols, combined with spherical silica nanoparticles equipped with a hydrophobic shell. Highly repellent layers were prepared using this combination of a hydrophobic crystalline wax and silica nanoparticles. The novel aspect of our concept was to prepare a ladder-like structure of the hydrophobic shell allowing the inclusion of a certain share of wax molecules. Wax molecules trapped in the hydrophobic structure during mixing are hindered from crystallizing; therefore, these molecules maintain a higher mobility compared to crystallized molecules. When a thin layer of the composite material is mechanically damaged, the mobile wax molecules can migrate and heal the defects to a certain extent. The general preparation of the composite is described and XRD analysis demonstrated that a certain share of wax molecules in the composite are hindered to crystallize. Furthermore, we show that the resulting material can recovery its repellent properties after surface damage.

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Metadaten
Author of HS ReutlingenTextor, Torsten
URN:urn:nbn:de:bsz:rt2-opus4-52350
DOI:https://doi.org/10.3390/molecules29163766
ISSN:1420-3049
Erschienen in:Molecules
Publisher:MDPI
Place of publication:Basel
Document Type:Journal article
Language:English
Publication year:2024
Volume:29
Issue:16
Page Number:13
First Page:1
Last Page:13
Article Number:3766
DDC classes:660 Technische Chemie
Open access?:Ja
Licence (German):License Logo  Creative Commons - CC BY - Namensnennung 4.0 International