Polyamide composite membrane and production method thereof
A composite membrane and polyamide technology, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of reducing the retention rate of composite membranes, increasing water flux, etc. The effect of large quantity and short process flow
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Embodiment 1
[0024] Prepare high-throughput polyamide composite membranes as follows:
[0025] Preparation of support layer: Weigh 80g of polysulfone resin (PSF), 370g of N-methylpyrrolidone (NMP), and 50g of polyethylene glycol 200 (PEG200), and mix them to prepare a 500g solution. Stir at 70°C for 6 hours to prepare a uniformly dispersed casting solution. After the casting liquid is filtered and degassed, it is evenly coated on the non-woven fabric on a film scraping machine, with a wet film thickness of 150 μm. After evaporating at room temperature for 3 seconds, it is immersed in ultra-pure water at 18°C to gel and solidify to form a film. , the membrane was treated in water at 70°C for 5 minutes to obtain a support layer, which was stored in pure water at 25°C until use.
[0026] Preparation of amine-containing solution: Weigh 239.2g of m-phenylenediamine, 0.8g of aniline, 88g of triethylamine, 184g of camphorsulfonic acid and 8g of sodium dodecylsulfonate, dissolve them in 7480g o...
Embodiment 2
[0031] The steps are the same as in Example 1, except that the amount of phenylenediamine in the amine solution is 236 g, and the amount of aniline is 4 g. See Table 1 for the data.
Embodiment 3
[0033]The steps are the same as in Example 1, except that the amount of phenylenediamine in the amine solution is 232 g, and the amount of aniline is 8 g. See Table 1 for the data.
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