Preparation method of nano-hybrid composite membrane
A hybrid composite and nano-technology, which is applied in the field of preparation of nano-hybrid composite membranes, can solve problems such as unstable performance of polyamide composite membranes, and achieve the effects of being beneficial to commercialization, popularization and application, low preparation cost and universal adaptability.
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Embodiment 1
[0039] Add sodium citrate and magnesium chloride to water to obtain an aqueous solution containing 0.5% sodium citrate and 0.2% magnesium chloride by mass fraction, then add 0.3% tetramethylammonium hydroxide, 1% MPD (m-phenylenediamine) and 0.2 % triethylamine, mix well, and stir in ultrasonic for 1h. Then prepare 0.2% trimesoyl chloride (TMC) oil phase solution (solvent is Isopar L). First coat the water phase solution on the polysulfone base film, pour off the excess solution after 60s, dry in the shade, then coat the oil phase solution on the shade-dried membrane, after 30s, pour off the excess oil phase solution, and dry it at 130°C Heat treatment in oven for 2min.
Embodiment 2
[0041] Add sodium citrate and magnesium chloride to water to obtain an aqueous solution containing 0.5% sodium citrate and 0.5% magnesium chloride by mass fraction, then add 0.3% tetramethylammonium hydroxide, 1% p-phenylenediamine and 0.2% diiso Propylethylamine, mix well, and stir in ultrasonic for 1h. Then prepare 0.2% trimesoyl chloride (TMC) oil phase solution. First coat the water phase solution on the polysulfone base film, pour off the excess solution after 60s, dry in the shade, then coat the oil phase solution on the shade-dried membrane, after 30s, pour off the excess oil phase solution, and dry it at 130°C Heat treatment in oven for 2min.
Embodiment 3
[0043] Add sodium citrate and calcium chloride to water to obtain an aqueous solution containing 1.0% sodium citrate and 0.5% calcium chloride by mass fraction, then add 0.3% tetramethylammonium hydroxide and 1% m-phthalylene Amine and 0.2% triethylamine, mix well, and stir in ultrasonic for 1.5h. Then prepare 0.2% trimesoyl chloride (TMC) oil phase solution. First coat the water phase solution on the polysulfone base film, pour off the excess solution after 60s, dry in the shade, then coat the oil phase solution on the shade-dried membrane, after 30s, pour off the excess oil phase solution, and dry it at 130°C Heat treatment in oven for 2min.
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