Composite nanofiltration membrane, and preparation method and applications thereof
A composite nanofiltration membrane and composite membrane technology are applied in the field of separation membranes, which can solve the problems of low flux and poor durability of nanofiltration membranes, and achieve the effects of simple preparation method, improved hydrophilicity, and improved water flux.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
preparation example Construction
[0030] The second aspect of the present invention provides the preparation method of above-mentioned composite nanofiltration membrane, and described preparation method comprises the following steps:
[0031] (1) By interfacial polymerization, a polyamide separation layer containing phytic acid is formed on one surface of the support layer to obtain a composite membrane;
[0032] (2) The surface of the polyamide separation layer of the composite membrane obtained in step (1) is contacted with a polyvalent metal cation solution to carry out chelation crosslinking to obtain the composite nanofiltration membrane.
[0033] In the method of the present invention, the way to obtain the polyamide separation layer is not particularly limited, and can be various conventional contact methods used in the field to carry out interfacial polymerization of polyamines and polyacyl chlorides. Preferably, the support layer is sequentially combined with The polyamine solution containing phytic a...
Embodiment 1
[0050] Contact the upper surface of the support layer (the surface of the polysulfone layer, the same below) with an aqueous solution containing 0.5wt% polyethyleneimine and 0.05wt% phytic acid, and discharge the liquid after contacting for 10s at 25°C; then, put the upper surface of the support layer again Contact the Isopar E solution containing 0.1wt% trimesoyl chloride, drain the liquid after contacting at 25°C for 10s, put the film into an oven, and heat at 70°C for 3min to obtain a composite film. The membrane was then immersed in 5 wt% FeCl 3 In the aqueous solution, the immersion temperature is 25°C, and the immersion time is 5min. After taking it out, wash it with deionized water. A nanofiltration membrane N1 was obtained, wherein the thickness of the separation layer was 0.33 μm.
Embodiment 2
[0052] Contact the upper surface of the support layer with phytic acid aqueous solution containing 1wt% polyethyleneimine and 10wt%, and discharge the liquid after contacting for 10s at 25°C; then, contact the upper surface of the support layer with 0.2wt% trimesoyl chloride. After the Isopar E solution was exposed to 25°C for 10s and drained, the film was placed in an oven and heated at 70°C for 3 minutes to obtain a composite film. The membrane was then immersed in 10wt% CuSO 4 In the aqueous solution, the immersion temperature is 25°C, and the immersion time is 10min. After taking it out, wash it with deionized water. A nanofiltration membrane N2 was obtained, wherein the thickness of the separation layer was 0.48 μm.
PUM
Property | Measurement | Unit |
---|---|---|
thickness | aaaaa | aaaaa |
thickness | aaaaa | aaaaa |
thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com