Fluoropolyether Silane Coating for Friction-Durable Repellency

The patent employs a composite silane compound structure that integrates multiple functional groups: a perfluoropolyether group for water and oil repellency, a specific organic group (cyclohexyl, phenyl, or adamantyl) for enhanced durability, and a hydrolyzable group for substrate bonding. This composite molecular structure resolves the contradiction by combining materials with different functional properties into a single cohesive compound that simultaneously achieves both repellency and friction durability.

The invention applies local quality by positioning different functional groups at specific locations within the molecular structure: the perfluoropolyether group is positioned to interact with water and oil molecules on the surface, while the durable organic group (cyclohexyl, phenyl, or adamantyl) is positioned to provide structural stability and friction resistance at the molecular level, and the hydrolyzable group is positioned to bond with the substrate. This spatial arrangement of different functional properties within the single compound resolves the contradiction between surface functionality and mechanical durability.

The patent changes the chemical and structural parameters of the silane compound by incorporating specific cyclic and aromatic groups (cyclohexyl, phenyl, adamantyl) that provide rigidity and friction resistance at the molecular level. These structural parameter changes enable the formation of densely packed, durable molecular arrangements within the thin film that simultaneously maintain optical transparency and enhance friction durability.

The invention creates a composite molecular structure that combines the optical transparency properties of perfluoropolyether with the mechanical durability properties of cyclic and aromatic organic groups. This composite approach allows the thin film to achieve both high light permeability and improved friction durability that would not be possible with single-function materials.