One‐Step Synthesis of a Durable and Liquid‐Repellent Poly(dimethylsiloxane) Coating

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.

Fundamentals and Applications of Polymer Brushes in Air

“…PDMS brushes have been identified as particularly effective antifouling coatings. 168 − 171 Even oils that completely wet almost all substrates easily roll off substrates coated with PDMS brushes. This has been attributed to the low surface energy of PDMS and the intrinsic liquid state of these brushes.…”

Bioinspired Fatty Acid Amide‐Based Slippery Oleogels for Shear‐Stable Lubrication

“…[ 13 ] Recent progress in extending the lubrication lifetime, by optimizing the rheological properties, patterned surface chemistry, surface geometry, and lubricant replenishment, remains an inherent limitation in lubrication under high‐speed turbulent flow, which severely restricts its practical applications such as in marine environments. [ 11 , 12 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ] In addition, the fouling resistance of slippery surfaces enables to sustain their lubrication property without biofilm‐induced drag and corrosion in marine environments, indicating the requirement of multifunctionality in liquid‐repellent surfaces.…”

Super pressure-resistant superhydrophobic fabrics with real self-cleaning performance

“…Superhydrophobic fabrics are promising to reduce or even avoid the use of detergents because of their self-cleaning property ( Cheng et al., 2019 ; Lim et al., 2010 ; Liu et al., 2020 , 2021 ). Many methods such as chemical vapor deposition, dip-coating and surface grafting have been developed to fabricate superhydrophobic fabrics ( Deng et al., 2010 ; Li et al., 2016a ; Xue et al., 2015 ; Zhang et al., 2019 ).…”