A composite reverse osmosis membrane
A technology of reverse osmosis membrane and functional membrane, which is applied in the field of water treatment membrane separation, which can solve the problems of short life, low efficiency, and poor high temperature resistance of reverse osmosis membranes, so as to improve service life, avoid biological pollution, and have good hydrophilicity Effect
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Embodiment 1
[0031] Prepare a composite reverse osmosis membrane containing 17% fluorine-containing polyaryletherketone and a base membrane doped with 0.02% graphene oxide. The specific steps are as follows:
[0032]1) Prepare trifluoromethane-based polyaryletherketone, DMF (dimethylformamide), polyvinylpyrrolidone and graphene oxide powder in a weight ratio of 17:68.98:14:0.02 to form a casting solution, stir evenly, and let stand After 1 hour, ultrasonic degassing for 10 minutes was used as the casting solution for the support layer;
[0033] 2) Apply the casting solution prepared in step 1) onto the non-woven fabric with a thickness of 80 μm using a film scraping machine, then evaporate at room temperature for 10 seconds, then immerse in deionized water at 20°C to gel and solidify to form a film, and then place it in a 60°C oven Dry in medium for 6 hours to obtain a support layer;
[0034] 3) Prepare solution A respectively: the solute is m-diphenylamine, the solvent is water, and the ...
Embodiment 2
[0039] Prepare a composite reverse osmosis membrane containing 18% fluorine-containing polyaryletherketone, and the base membrane is doped with 0.05% graphene oxide. The specific steps are as follows:
[0040] 1) The fluorine-containing polyarylether ketone, DMAc (dimethylacetamide), polyethylene glycol and graphene oxide powder were formulated into a casting solution in a ratio of 18:69.95:12:0.05, stirred evenly, and then ultrasonicated after standing for 1 h Degassed for 15 minutes, used as a casting solution for the support layer; the fluorine-containing polyaryletherketone is p-bisphenol, 1,4-bis(4'-fluorobenzoyl)benzene and 1,3-bis(4'-fluorobenzene Acyl) benzene polymer PPAEK-AF.
[0041] 2) Apply the casting solution prepared in step 1) onto the non-woven fabric with a thickness of 100 μm using a film scraping machine, then evaporate at room temperature for 10 seconds, then immerse in deionized water at 25°C to gel and solidify to form a film, and then place it in a 60°...
Embodiment 3
[0047] Prepare a composite reverse osmosis membrane containing 19% fluorine-containing polyaryletherketone, the base membrane is doped with 0.05% graphene oxide, and the desalination layer is doped with graphene oxide. The specific steps are as follows:
[0048] 1) Prepare fluorine-containing polyaryletherketone, DMAc (dimethylacetamide), polyethylene glycol, and graphene oxide powder in a ratio of 19:69.98:11:0.05 to form a casting solution, stir evenly, and then ultrasonically Degassed for 15 minutes, used as a casting solution for the support layer; the fluorine-containing polyaryletherketone is m-bisphenol, 1,4-bis(4'-fluorobenzoyl)benzene and 1,3-bis(4'-fluorobenzene Acyl) benzene polymer MPAEK-AF.
[0049] 2) Apply the casting solution prepared in step 1) onto the non-woven fabric with a thickness of 120 μm using a film scraping machine, then evaporate at room temperature for 10 seconds, then immerse in 20°C deionized water to gel and solidify to form a film, and then pl...
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