Metal ion adsorption sewage separation membrane preparation method
A technology of metal ion and separation membrane, which is applied in the direction of adsorption water/sewage treatment, semi-permeable membrane separation, water/sewage treatment, etc. It can solve the problems of insufficient performance and complicated preparation process of adsorption membrane, so as to improve complexation, The effect of efficient recycling
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[0039] Example 1
[0040] First, 100 mg of graphene oxide was ultrasonically dispersed in 100 mL of deionized water, and 2 g of tannins were added. The solution was heated to 50°C and stirred for 12 hours. The product was filtered with a membrane with a pore size of 0.2 μm. After washing, it was dried and ground for storage to obtain polyphenols. Modified graphene oxide (TA-GO).
[0041] Disperse 2gTA-GO in 84g DMF ultrasonically, in N 2 Under the protection, slowly add 12.5g of the pretreated PVDF powder (average molecular weight 100,000-400,000) and 1.5g of the pore-forming agent polyvinylpyrrolidone K30 to the dispersion liquid, stirring and reacting for 24 hours to make the casting liquid uniform and stable, and finally Put it in a vacuum drying oven to degas for 6h.
[0042] Pour the obtained casting liquid onto a glass plate, scrape out a flat film with uniform thickness with a spatula, and then place it in a water coagulation bath to solidify into a film. After taking it out...
Example Embodiment
[0043] Example 2
[0044] First, 100 mg of graphene oxide was ultrasonically dispersed in 100 mL of deionized water, and then 2 g of dopamine was added. The solution was heated to 50°C and stirred for 12 hours. The product was filtered with a 0.2μm pore membrane, then washed, dried and ground for storage to obtain the dopamine modified Graphene oxide (DA-GO).
[0045] Disperse 1gDA-GO in 84g DMF ultrasonically, in N 2 Under the protection, slowly add 13.5g of the pretreated PVDF powder (average molecular weight 100,000-400,000) and 1.5g of the pore-forming agent polyvinylpyrrolidone K30 to the dispersion liquid, stirring and reacting for 24h to make the casting liquid uniform and stable, and finally Put it in a vacuum drying oven to degas for 6h.
[0046] Pour the obtained casting liquid onto a glass plate, scrape out a flat film with uniform thickness with a spatula, and then place it in a water coagulation bath to solidify into a film. After taking it out, wash it with deionized ...
Example Embodiment
[0047] Example 3
[0048] First, 100 mg of graphene oxide was ultrasonically dispersed in 100 mL of deionized water, and 2 g of pyrogallic acid was added. The solution was heated to 50°C and stirred for 12 hours. The product was filtered with a 0.2μm pore size membrane, then washed, dried and ground for storage to obtain pyrogallium Acid modified graphene oxide (PG-GO).
[0049] Disperse 1.5g PG-GO in 84g DMF ultrasonically, in N 2 Under protection, slowly add 13.5g of PVDF powder (average molecular weight 100,000 to 400,000) and 1g of pore-forming agent polyvinylpyrrolidone K30 to the dispersion liquid after drying, and stir for 24 hours to make the casting liquid uniform and stable. It is placed in a vacuum drying oven to degas for 6 hours.
[0050] Pour the obtained casting liquid onto a glass plate, scrape out a flat film with uniform thickness with a spatula, and then place it in a water coagulation bath to solidify into a film. After taking it out, wash it with deionized wate...
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