High light transmittance breathable PSF composite film and preparation method thereof
By introducing low-refractive-index PDMS and nano-titanium dioxide into the PSF film to form a refractive index gradient, the contradiction between maintaining transparency and gas exchange capacity of the PSF film was resolved, realizing the preparation of a high-transmittance and gas-permeable PSF composite film, which improves the transparency and gas flux of the film.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TIANJIN POLYTECHNIC UNIV
- Filing Date
- 2026-04-28
- Publication Date
- 2026-07-17
AI Technical Summary
Existing PSF membranes, while maintaining air permeability, suffer from opacity due to light scattering, and densification processes block gas channels, making it difficult to simultaneously achieve high transparency and gas exchange capacity.
Asymmetric polysulfone-based membranes were prepared using a solvent-free phase separation method. A modified solution was formed by mixing polydimethylsiloxane, curing agent, diluent, and nano-titanium dioxide solution and coated onto the membrane surface. The refractive index gradient was adjusted by using low-refractive-index PDMS and nano-titanium dioxide to penetrate into the membrane pores and form an interpenetrating network structure.
It significantly improves the membrane's light transmittance and gas flux, maintains the membrane's transparency, preserves its gas exchange capacity, enhances the membrane's tensile strength and flexibility, and prevents liquid water wetting and penetration.
Smart Images
Figure CN122399601A_ABST