Scratch‐Resistant Hydrophobic Coating with Supramolecular‐Polymer Co‐Assembly

Abstract

Supramolecular assembly for superhydrophobic coatings is known for its efficiency and efficacy. However, the mechanical fragility of the coatings limits their use as coating materials. Herein, the combination of (±)‐N,N'‐(trans‐cyclohexane‐1,2‐diyl)‐bis(perfluorooctanamide) CF7, a cyclohexyl diamide‐based low molecular weight gelator, with acrylate polymers for the generation of semi‐transparent omniphobic coatings with significantly enhanced scratch proofness is presented. CF7 has shown the ability to self‐assemble in common solvents into highly entangled fibrous networks with extreme water repellency. The incorporation of covalent polymers, specifically poly(methyl methacrylate) (PMMA) and poly(trifluoroethyl methacrylate) (PTFEMA), helps to fixate the supramolecular CF7 fibers without interfering with the self‐assembled structures. The resulting coatings, namely CF7/PMMA and CF7/PTFEMA, show significantly improved mechanical resistance as well as optical transparency while maintaining excellent water and oil repellency. Furthermore, the homogeneity of the coating in bulk is confirmed by depth profiling of the 3D distribution of the components using time‐of‐flight secondary ion mass spectrometry imaging, which turns out to be an essential technique in order to characterize such materials.

Collagen fiber-reinforced, tough and adaptive conductive organohydrogel e-skin for multimodal sensing applications

“…28 Therefore, BD-CQDs were used as a reducing agent and stabilizer to prepare BD-CQDs silver nanoparticles (BD-CQDs@AgNPs), endowing the hydrogel with good conductivity and antibacterial properties, thereby realizing its long-term use possibility. Thirdly, to address the adaptability of CHs in different environments (low temperature and dry), strategies like hydrophobic coatings, 29 salts, 30 and polyols have been proposed. 31 Among them, glycerin (Gly) has been widely used in food, cosmetics and medical industries because of its low cost and good moisturizing properties.…”