Gas Separation Membrane with Chemically Bonded Resin Layers

The patent introduces an intermediary layer between the thin film and the plasma-polymerized film to improve adhesion. This intermediary layer acts as a mediator that chemically bonds to both the thin film substrate and the plasma-polymerized coating, preventing peeling while maintaining gas selectivity. The intermediary layer resolves the adhesion problem without compromising the gas separation function.

The patent creates a multi-layer composite membrane structure consisting of a thin film, an intermediary adhesion layer, and a plasma-polymerized film. By combining different materials with complementary properties, the composite structure achieves both strong interlayer adhesion and high gas selectivity, overcoming the limitations of simple binary composites.

The patent applies local quality by creating regions of different thickness and porosity within the membrane structure. The thin film provides localized pore sealing for mechanical integrity, while the porous support layer maintains overall structural strength. This localized differentiation allows the membrane to achieve both mechanical strength and high gas transmission without requiring uniform thickness increase throughout the entire membrane.

The patent utilizes porous materials in the support layer to maintain mechanical strength while allowing high gas permeability. The porous structure provides structural rigidity through its framework while the interconnected pores facilitate efficient gas transport, reducing the energy required for gas separation compared to dense non-porous structures.