A kind of preparation method of forward osmosis membrane
A forward osmosis membrane and ultrafiltration base membrane technology, applied in the field of forward osmosis membrane preparation, can solve the problems of high cost and complex forward osmosis membrane method, and achieve the effects of low cost, controllable side reactions and improved stability
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specific Embodiment approach 1
[0016] Specific embodiment one: the preparation method of a kind of forward osmosis membrane of this embodiment comprises the following steps:
[0017] One, solvent, pore-forming agent and polyacrylonitrile are mixed, make polyacrylonitrile solution;
[0018] 2. Utilize the immersion-precipitation phase inversion method to make the polyacrylonitrile solution into an ultrafiltration base membrane, wash with deionized water for 3 to 5 times, and obtain a polyacrylonitrile base membrane;
[0019] 3. Put the polyacrylonitrile-based membrane in sodium hydroxide solution and react at 20°C-50°C for 20min-60min. After the reaction, take out the polyacrylonitrile-based membrane and soak it in deionized water for 0.5-2h , and then immersed in hydrochloric acid solution for 1 to 5 hours to obtain the treated polyacrylonitrile-based membrane;
[0020] 4. Immerse the polyacrylonitrile base membrane treated in step 3 in the aniline-ethanol solution, soak for 170-190min, then take it out, a...
specific Embodiment approach 2
[0025] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the solvent in Step 1 is N-methylpyrrolidone. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0026] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the pore-forming agent in step 1 is polyethylene glycol or polyvinylpyrrolidone. Others are the same as in the first or second embodiment.
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