Hydrophilic polyamide reverse osmosis membrane with compact surface as well as preparation method and application thereof
A technology of reverse osmosis membrane and polyamide, used in reverse osmosis, semi-permeable membrane separation, chemical instruments and methods, etc., can solve problems such as membrane water flux decline
Pending Publication Date: 2020-07-21
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AI-Extracted Technical Summary
Problems solved by technology
The invention relates to a hydrophilic polyamide reverse osmosis membrane with a compact surface as well as a preparation method and application thereof. Specifically, the invention relates to a hydrophilic polyamide reverse osmosis membrane with a compact surface, comprising a polyamide base membrane and a crosslinked polyethyleneimine layer grafted to the polyamide base membrane, wherein the crosslinked polyethyleneimine layer is formed from a polyethyleneimine blend comprising branched polyethyleneimine, and the degree of branching of the branched polyethyleneimine is between 55% and 65%. The invention also relates to the preparation method of the reverse osmosis membrane and application of the reverse osmosis membrane in separating boric acid from liquid effluent of a nuclear power plant.
MembranesReverse osmosis +3
Cross-linked polyethylenePolyamide +7
- Experimental program(8)
- Comparison scheme(1)
|Water contact angle||<= 53.0||deg|
|Weight average molecular weight||20000.0 ~ 30000.0|
|Weight average molecular weight||60000.0 ~ 80000.0|
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