One‐Step Synthesis of a Durable and Liquid‐Repellent Poly(dimethylsiloxane) Coating. Issue 23 (6th May 2021)

• Record Type: Journal Article
• Authors: Liu, Jie; Sun, Yuling; Zhou, Xiaoteng; Li, Xiaomei; Kappl, Michael; Steffen, Werner; Butt, Hans‐Jürgen
• Is Part Of: Advanced materials. Volume 33:Issue 23(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-05-06
• Subjects: adhesion -- liquid‐repellency -- poly(dimethylsiloxane) -- polymer brushes -- wetting; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.202100237
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: Coatings with low sliding angles for liquid drops have a broad range of applications. However, it remains a challenge to have a fast, easy, and universal preparation method for coatings that are long‐term stable, robust, and environmentally friendly. Here, a one‐step grafting‐from approach is reported for poly(dimethylsiloxane) (PDMS) brushes on surfaces through spontaneous polymerization of dichlorodimethylsilane fulfilling all these requirements. Drops of a variety of liquids slide off at tilt angles below 5°. This non‐stick coating with autophobicity can reduce the waste of water and solvents in cleaning. The strong covalent attachment of the PDMS brush to the substrate makes them mechanically robust and UV‐tolerant. Their resistance to high temperatures and to droplet sliding erosion, combined with the low film thickness (≈8 nm) makes them ideal candidates to solve the long‐term degradation issues of coatings for heat‐transfer surfaces. Abstract : A non‐stick coating with autophobicity is fabricated by a one‐step grafting‐from approach for poly(dimethylsiloxane) (PDMS) brushes on surfaces. Independent of surface tension, liquid droplets can easily slide on such surfaces.