Nano fiber composite hemodialysis membrane with directional toxin removing passage and preparation thereof
A nanofiber membrane and hemodialysis technology, which is applied in the field of composite dialysis membrane and its preparation, can solve the problems of toxicity and incompatible carbon nanotubes, and achieve high protein adsorption resistance, low hemolysis rate, and inhibition of platelet adhesion. Effect
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Embodiment 1
[0034] (1) Dissolve 250 mg of dopamine in 500 mL of tris buffer solution (10 mmol / L), add 500 mg of carbon nanotubes, adjust the pH of the solution to 8.5 after ultrasonic dispersion, stir and react at room temperature for 12 h, and filter The polydopamine-adhered carbon nanotubes were obtained by washing with 0.02mol / L hydrochloric acid and ultrapure water, respectively, and drying.
[0035] (2) The polydopamine-adhered carbon nanotubes were ultrasonically dispersed in ultrapure water at a concentration of 1.0 mg / mL, 500 mg of heparin sodium was added, and the reaction was stirred at room temperature for 24 h, filtered, washed with ultrapure water, and dried to obtain heparin functionalization. of carbon nanotubes.
[0036](3) Dissolve polyacrylonitrile with a weight-average molecular weight of 120,000 in N,N-dimethylformamide for 8 hours at a temperature of 50°C to prepare a solution with a mass fraction of 8%, at an ambient humidity of 45%, and an ambient temperature of 30°...
Embodiment 2
[0040] (1) Dissolve 250mg of dopamine in 500mL tris buffer solution (10mmol / L), add 500mg of carbon nanotubes, adjust the pH value of the solution to 8.5 after ultrasonic dispersion, stir and react at room temperature for 12h, and filter Washing with 0.02 mol / L hydrochloric acid and ultrapure water respectively and drying to obtain polydopamine-adhered carbon nanotubes.
[0041] (2) Ultrasonic dispersion of polydopamine-adhered carbon nanotubes in ultrapure water at a concentration of 1.0 mg / mL, adding 500 mg of heparin sodium and stirring at room temperature for 24 hours, filtered, washed with ultrapure water, and dried to obtain heparin functionalization of carbon nanotubes.
[0042] (3) Dissolve polyacrylonitrile with a weight-average molecular weight of 120,000 in N,N-dimethylformamide for 8 hours at a temperature of 50°C to prepare a solution with a mass fraction of 8%, at an ambient humidity of 45%, and an ambient temperature of 30°C , the voltage is 24kV, the spinning ...
Embodiment 3
[0046] (1) Dissolve 250mg of dopamine in 500mL tris buffer solution (10mmol / L), add 500mg of carbon nanotubes, adjust the pH value of the solution to 8.5 after ultrasonic dispersion, stir and react at room temperature for 12h, and filter Washing with 0.02 mol / L hydrochloric acid and ultrapure water respectively and drying to obtain polydopamine-adhered carbon nanotubes.
[0047] (2) Ultrasonic dispersion of polydopamine-adhered carbon nanotubes in ultrapure water at a concentration of 1.0 mg / mL, adding 500 mg of heparin sodium and stirring at room temperature for 24 hours, filtered, washed with ultrapure water, and dried to obtain heparin functionalization of carbon nanotubes.
[0048] (3) Dissolve polyacrylonitrile with a weight-average molecular weight of 120,000 in N,N-dimethylformamide for 8 hours at a temperature of 50°C to prepare a solution with a mass fraction of 8%, at an ambient humidity of 45%, and an ambient temperature of 30°C , the voltage is 24kV, the spinning ...
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