A kind of hydrophilic anti-fouling polyamide composite reverse osmosis membrane and preparation method thereof
A reverse osmosis membrane, anti-pollution technology, applied in the field of water treatment, can solve the problems of inability to form a hydrophilic coating, low activity, limited amount of active groups, etc., and achieve good hydrophilicity, anti-pollution ability, and graft density. The effect of high and short process flow
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Embodiment 1
[0024] With the cross-linked polyamide composite reverse osmosis membrane of comparative example 1 as the cross-linked polyamide composite reverse osmosis membrane to be grafted;
[0025] Rinse the surface of the cross-linked polyamide composite reverse osmosis membrane (cross-linked polyamide layer) to be grafted with deionized water, then purge the membrane surface with nitrogen to no droplets; prepare an aqueous ammonium persulfate solution containing a mass concentration of 0.07%, The surface of the cross-linked polyamide composite reverse osmosis membrane to be grafted was contacted with the above-mentioned initiator solution for 7 minutes, and then the membrane surface was purged with nitrogen until there were no droplets; (HEMA) aqueous solution, contact the surface of the cross-linked polyamide composite reverse osmosis membrane containing the initiator with the above solution for 10 minutes, heat treatment at 75°C to obtain a hydrophilic anti-pollution polyamide compos...
Embodiment 2
[0028] The preparation method of the hydrophilic anti-fouling polyamide composite reverse osmosis membrane is the same as that of Example 1, but the contact time between the surface of the cross-linked polyamide composite reverse osmosis membrane containing the initiator and the monomer solution is 5 minutes.
[0029] The test method is the same as that of Comparative Example 1, and the obtained results are shown in Table 1.
Embodiment 3
[0031] The preparation method of the hydrophilic anti-fouling polyamide composite reverse osmosis membrane is the same as that of Example 1, but the contact time between the surface of the cross-linked polyamide composite reverse osmosis membrane containing the initiator and the monomer solution is 20 minutes.
[0032] The test method is the same as that of Comparative Example 1, and the obtained results are shown in Table 1.
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