A composite nanofiltration membrane based on in-situ self-repair of dynamic covalent bonds in response to temperature and a preparation method and application thereof
By introducing a dynamic covalent cross-linked network of imine or disulfide bonds into the nanofiltration membrane, the problem of nanofiltration membrane damage is solved, achieving efficient temperature-responsive self-healing, improving the membrane's separation and mechanical properties, and extending its service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANDONG HAIHUA GRP CO LTD
- Filing Date
- 2026-01-12
- Publication Date
- 2026-05-29
AI Technical Summary
Existing nanofiltration membranes are susceptible to damage during use due to factors such as fluctuations in operating pressure and friction from contaminants, resulting in decreased separation performance and low repair efficiency. Furthermore, existing β-cyclodextrin self-healing systems are complex to operate, lack sufficient chemical stability, and have limited repair efficiency.
By introducing dynamic covalent bonds of imine or disulfide bonds, a temperature-responsive dynamic covalent cross-linking network is constructed. Through heating to trigger bond breaking and recombination, in-situ rapid self-repair of membrane damage is achieved, simplifying the operation process.
It achieves efficient membrane damage repair with a repair efficiency of ≥90%, restores separation performance to the level of a new membrane, significantly extends membrane life, reduces operating costs, and improves the mechanical properties and damage resistance of the membrane.
Smart Images
Figure CN121490572B_ABST