Guanidyl-functionalized graphene oxide/polysulfone ultrafiltration membrane and preparation method thereof
A polysulfone ultrafiltration membrane and amino functionalization technology are applied in the field of guanidine functionalized graphene oxide/polysulfone ultrafiltration membrane and its preparation, which can solve the problems of impairing membrane performance, increasing operating costs and the like, and improving separation performance. , and the effect of anti-pollution improvement and pure water flux improvement
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example 1
[0035] A kind of preparation method of guanidine functionalized graphene oxide / polysulfone ultrafiltration membrane is as follows:
[0036] (1) Preparation of AFG: 100mg GO, 40mL thionyl chloride and 2ml DMF were mixed in a flask. After sonication to fully disperse GO in the solvent, the mixture was stirred at 60 °C for 12 h. The acylated intermediate was separated by centrifugation, washed with dry DMF, and transferred directly to 25 mL of 1,6-hexanediamine heated to 45 °C. The mixture was stirred evenly at 50 °C, the product was washed with water several times, and then dried under vacuum at room temperature.
[0037] (2) Preparation of GFG: 50mg AFG, 3g OMIU and 50mL water were mixed in a flask so that the solution was uniformly dispersed, and then the pH of the solution was adjusted to 11 by NaOH aqueous solution. The mixture was stirred at 40 °C and quenched by adding 2 mL of TFA. After washing with water, the product was dried under vacuum at room temperature.
[003...
example 2
[0042] A kind of preparation method of guanidine functionalized graphene oxide / polysulfone ultrafiltration membrane is as follows:
[0043](1) Preparation of AFG: 150 mg GO, 30 mL thionyl chloride and 1 mL DMF were mixed in a flask. After sonication to fully disperse GO in the solvent, the mixture was stirred at 100 °C for 16 h. The acylated intermediate was separated by centrifugation, washed twice with dry DMF, and transferred directly to 35 mL of 1,6-hexanediamine heated to 40 °C. The mixture was stirred evenly at 40 °C, the product was washed with water several times, and then dried under vacuum at room temperature.
[0044] (2) Preparation of GFG: 10 mg AFG, 2 g OMIU and 30 mL water were mixed in a flask to make the solution uniformly dispersed, and then the pH of the solution was adjusted to 11 by NaOH aqueous solution. The mixture was stirred at 60 °C and quenched by adding 1 mL of TFA. After washing with water, the product was dried under vacuum at room temperature....
example 3
[0049] A kind of preparation method of guanidine functionalized graphene oxide / polysulfone ultrafiltration membrane is as follows:
[0050] (1) Preparation of AFG: 200 mg GO, 45 mL thionyl chloride and 5 mL DMF were mixed in a flask. After sonication to fully disperse GO in the solvent, the mixture was stirred at 80 °C for 30 h. The acylated intermediate was separated by centrifugation, washed twice with dry DMF, and transferred directly to 40 mL of 1,6-hexanediamine heated to 60 °C. The mixture was stirred evenly at 60 °C, the product was washed with water several times, and then dried under vacuum at room temperature.
[0051] (2) Preparation of GFG: 100 mg AFG, 4 g OMIU and 50 mL water were mixed in a flask so that the solution was uniformly dispersed, and then the pH of the solution was adjusted to 11 by NaOH aqueous solution. The mixture was stirred well at 60 °C and quenched by adding 5 mL of TFA. After washing with water, the product was dried under vacuum at room te...
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