Preparation method for organic-inorganic composite separation membrane with hydrophilicity and function of photocatalytic degradation of pollutants
An inorganic composite and photocatalytic technology, applied in chemical instruments and methods, semi-permeable membrane separation, membrane technology, etc., can solve the problems of insufficient modification effect and functionality, and achieve good anti-protein pollution performance. , Significant anti-pollution effect, good hydrophilicity and the effect of photocatalytic degradation of pollutants
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[0021] Example 1:
[0022] Add 0.5 g Fe 3 O 4 TiO 2 / Graphene oxide nanocomposite was ultrasonically dispersed in 79 g of N-N dimethylacetamide, 19 g of polyacrylonitrile and 1.5 g of polyvinylpyrrolidone were added after 2 hours, and then heated and stirred in a water bath at 50°C for 24 hours to obtain Fe 3 O 4 TiO 2 / Graphene oxide is uniformly dispersed in the film casting solution, and the film casting solution is allowed to stand for deaeration; the glass plate is placed in an orthogonal magnetic field (magnetic field strength of 15000 Gauss) and the casting solution is poured on the glass plate to scrape the film, 30 seconds Then put it into deionized water for solidification under the action of a magnetic field, take out the membrane after 15 minutes and soak in deionized water for 24 hours to obtain polyacrylonitrile-Fe 3 O 4 TiO 2 / Graphene oxide composite flat ultrafiltration membrane.
Example Embodiment
[0023] Example 2:
[0024] 1.5 grams of CoFe 2 O 4 TiO 2 / Graphene oxide nanocomposite was ultrasonically dispersed in 78 g of NN dimethylformamide, 18.5 g of polyvinylidene fluoride and 2 g of polyethylene glycol were added after 2 hours, and then heated and stirred in a water bath at 45°C for 24 hours. CoFe 2 O 4 TiO 2 / Graphene oxide is uniformly dispersed in the film casting solution, and the film casting solution is allowed to stand for degassing; the alumina porous tube is placed in an orthogonal magnetic field (magnetic field intensity 12000 Gauss) and then the film is coated on the inner wall of the porous tube, after 25 seconds Under the action of a magnetic field, it was solidified in a 3% NN dimethylformamide aqueous solution. After 30 minutes, the membrane was taken out and soaked in deionized water for 24 hours to obtain polyvinylidene fluoride-CoFe 2 O 4 TiO 2 / Graphene oxide composite tubular ultrafiltration membrane.
Example Embodiment
[0025] Example 3:
[0026] 2.5g NiFe 2 O 4 TiO 2 / Graphene oxide nanocomposite was ultrasonically dispersed in 77.5 g of dimethyl sulfoxide, 17.5 g of polyamide and 2.5 g of polyvinyl alcohol were added after 2 hours, and then heated and stirred in a water bath at 60°C for 24 hours to obtain NiFe 2 O 4 TiO 2 / Graphene oxide is uniformly dispersed in the casting solution, the casting solution is allowed to stand for deaeration; the polypropylene non-woven fabric is placed in an orthogonal magnetic field (magnetic field strength 8000 Gauss) and the casting solution is poured on the non-woven fabric to scrape the film After 30 seconds, put it in a 5% N-methylpyrrolidone aqueous solution under the action of a magnetic field for solidification. After 15 minutes, take out the membrane and soak it in deionized water for 24 hours to obtain polyamide-NiFe 2 O 4 TiO 2 / Graphene oxide composite flat microfiltration membrane.
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