A kind of preparation method of reverse osmosis membrane modified by graphene oxide/polyvinyl alcohol coating
A polyvinyl alcohol, reverse osmosis membrane technology, applied in chemical instruments and methods, reverse osmosis, semi-permeable membrane separation, etc., can solve the problem of reverse osmosis membrane water flux reduction, polyvinyl alcohol coating peeling, reverse osmosis membrane water Flux impact and other issues, to achieve the effect of improving the water flux decline
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Embodiment 1
[0030] Get m-phenylenediamine 70g, triethylamine 40g and camphorsulfonic acid 70g and add in 1000ml deionized water, and magnetically stir for 5min to prepare an aqueous phase solution (water phase solution m-phenylenediamine mass concentration 5.9%, triethylamine mass concentration 3.4%) %, camphorsulfonic acid 5.9%), get trimesoyl chloride 3g and add in 1000ml normal hexane, stir to dissolve, make trimesoyl chloride-n-hexane oil phase solution (0.3% of trimesoyl chloride mass concentration in oil phase solution ), the polysulfone support membrane is immersed in the aqueous phase solution, and the immersion time is 25s. After taking it out, the solvent deionized water is removed, and then immersed in the prepared trimesoyl chloride-n-hexane oil phase solution for interfacial polymerization reaction, interfacial polymerization The reaction time is 50s, remove the solvent n-hexane after taking it out, and obtain the nascent reverse osmosis membrane;
[0031] Dissolve 40 g of po...
Embodiment 2
[0035] Get m-phenylenediamine 70g, triethylamine 40g and camphorsulfonic acid 70g and add in 1000ml deionized water, and magnetically stir for 5min to prepare an aqueous phase solution (water phase solution m-phenylenediamine mass concentration 5.9%, triethylamine mass concentration 3.4%) %, camphorsulfonic acid 5.9%), get trimesoyl chloride 3g and add in 1000ml normal hexane, stir to dissolve, make trimesoyl chloride-n-hexane oil phase solution (0.3% of trimesoyl chloride mass concentration in oil phase solution ), the polysulfone support membrane is immersed in the aqueous phase solution, and the immersion time is 25s. After taking it out, the solvent deionized water is removed, and then immersed in the prepared trimesoyl chloride-n-hexane oil phase solution for interfacial polymerization reaction, interfacial polymerization The reaction time is 50s, remove the solvent n-hexane after taking it out, and obtain the nascent reverse osmosis membrane;
[0036] Dissolve 40 g of po...
Embodiment 3
[0040] Get m-phenylenediamine 70g, triethylamine 40g and camphorsulfonic acid 70g and add in 1000ml deionized water, and magnetically stir for 5min to prepare an aqueous phase solution (water phase solution m-phenylenediamine mass concentration 5.9%, triethylamine mass concentration 3.4%) %, camphorsulfonic acid 5.9%), get trimesoyl chloride 3g and add in 1000ml normal hexane, stir to dissolve, make trimesoyl chloride-n-hexane oil phase solution (0.3% of trimesoyl chloride mass concentration in oil phase solution ), the polysulfone support membrane is immersed in the aqueous phase solution, and the immersion time is 25s. After taking it out, the solvent deionized water is removed, and then immersed in the prepared trimesoyl chloride-n-hexane oil phase solution for interfacial polymerization reaction, interfacial polymerization The reaction time is 50s, remove the solvent n-hexane after taking it out, and obtain the nascent reverse osmosis membrane;
[0041] Dissolve 40 g of po...
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