High-moisture-permeability anti-adhesion coating composite film and preparation method thereof

The invention discloses a high-moisture-permeability anti-adhesion coating composite film and a preparation method thereof. According to the high-moisture-permeability anti-adhesion coating composite membrane, a porous supporting layer membrane material is coated with an active skin layer; the active skin layer is coated in an interface deposition manner, and is grafted on the porous supporting layer through hydrogen bonds by virtue of intermolecular acting force, so that an asymmetric structure with a compact surface is formed. The active skin layer component is a PVP-polyvinyl siloxane active molecular structure which is formed by copolymerizing a vinyl silane coupling agent with N-vinyl pyrrolidone (NVP) and then carrying out hydrolytic condensation on the copolymerized vinyl silane coupling agent and N-vinyl pyrrolidone (NVP). According to the composite film, the problem that mass production cannot be realized due to adhesion of existing high-moisture-permeability film materials is well solved, namely the