Composite membranes, methods of making and using the same
By employing a composite membrane structure in the interfacial evaporator, including a base membrane, a functional layer, and a photothermal layer, the problems of insufficient hydrophilicity of the evaporation interface and difficulty in suppressing pollution in existing technologies are solved, achieving efficient and durable seawater desalination and saline wastewater treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SOUTHERN MARINE SCIENCE & ENGINEERING GUANGDONG LABORATORY (ZHANJIANG)
- Filing Date
- 2025-11-26
- Publication Date
- 2026-07-14
AI Technical Summary
Existing interfacial evaporators suffer from insufficient hydrophilicity of the evaporation interface, discontinuous water supply, long start-up time, high apparent enthalpy of evaporation, easy clogging due to salt crystallization, difficulty in suppressing organic pollution and biofouling under long-term operation, reduced throughput and risk of interlayer delamination, and the materials are difficult to degrade or recycle, resulting in high costs and difficulty in large-scale application.
A composite membrane structure is adopted, including a base membrane, a functional layer and a photothermal layer. The functional layer is formed by alternating deposition of cationic polyelectrolyte layers and anionic polyelectrolyte layers, and the photothermal layer is composed of carbon nanotubes or molybdenum disulfide-supported carbon nanotubes. Through layer-by-layer self-assembly technology and stabilization treatment, a hydrophilic, antibacterial and broad-spectrum absorption membrane structure is constructed.
It improves evaporation efficiency, reduces apparent enthalpy of vaporization, inhibits organic and biological pollution, maintains good flux and durability, reduces environmental burden, and achieves efficient seawater desalination and saline wastewater treatment.
Smart Images
Figure CN121490593B_ABST