Method for preparing hydrophilic anti-pollution reverse osmosis membrane
A reverse osmosis membrane, anti-pollution technology, applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problems of polyamide membrane without chemical bonding, PVA cross-linked membrane instability, etc., to achieve anti-pollution performance Effect of improving and improving hydrophilicity and prolonging service life
Active Publication Date: 2009-05-27
NINGBO HIDROTEK CO LTD
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The invention discloses a preparation method of a hydrophilic pollution-resistant reverse osmosis membrane which is characterized in that a daiamid layer is compounded on a supporting layer by an interface polyreaction at first; then reaction occurs on the daiamid layer to generate a crosslinking layer by the surface grafting reaction. Compared with the prior art, the preparation method has the advantages that N-hydroxy thio succinimide sodium salt or N-hydroxy thio succinimide is adopted as the active ester of a midbody for grafting a -(CH2CH2O)n- macromolecular hydrophilic chain on a polyamide cortex; moreover, the -(CH2CH2O)n- is combined with the polyamide membrane of a base by a chemical bond, thus improving the hydrophilicity of a compound reverse osmosis membrane, increasing the water flux thereof and improving the pollution resistance thereof, thereby prolonging the service life of the membrane.
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