Cellulose antibacterial film and preparation method thereof
An antibacterial film and cellulose technology, applied in the field of biomedical gel, can solve the problems of wound recovery, poor performance of absorbing wound exudate, and uneven quality in patients with wound infection, and achieve biodegradability, non-toxicity, Good antibacterial effect, high mechanical strength effect
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[0025] A cellulose antibacterial film and a preparation method thereof, characterized by comprising the following steps:
[0026] (1) Preparation of polydopamine solution: mix 756 mL of deionized water, 6 mL of ammonia, and 336 mL of ethanol in a beaker, and stir for 30 min. Dissolve 4.2 g of dopamine in 84 mL of deionized water, add it to the middle beaker and mix well. The polydopamine solution is divided into 10 500mL volumetric flasks.
[0027] (2) Configuration of polyethyleneimine solution: Weigh 2g, 4g, 6g, 10g polyethyleneimine and dissolve them in 200mL deionized water to prepare polyethyleneimine concentrations of 1%, 2%, 3%, and 5%. Amine solution. The polyethyleneimine solution is equally divided into 10 500mL volumetric flasks.
[0028] (3) Dipping and compounding of bacterial cellulose / polydopamine / polyethyleneimine composite membrane: Place the bacterial cellulose membrane cultured for 7 days in a 500mL volumetric flask filled with polydopamine solution at 100rpm an...
Embodiment 2
[0031] Place the bacterial cellulose film cultured for 7 days in a 500 mL volumetric flask containing polydopamine solution, and place it on a shaker at 100 rpm and 30° C. to immerse and compound for 24 hours. Take the bacterial cellulose film out of the polydopamine (PDA) solution, rinse it with deionized water for 2-3 times, and put it in a polyethyleneimine solution with a concentration of 1% at 100 rpm and 30°C. The bed was shaken and impregnated for 24 hours.
[0032] The wet film that has been immersed and composited is taken out and dried naturally in the air to prepare a bacterial cellulose / polydopamine / polyethyleneimine film.
Embodiment 3
[0034] Place the bacterial cellulose film cultured for 7 days in a 500 mL volumetric flask containing polydopamine solution, and place it on a shaker at 100 rpm and 30° C. to immerse and compound for 24 hours. Take the bacterial cellulose film out of the polydopamine (PDA) solution, rinse it with deionized water for 2-3 times, put it in a 2% polyethyleneimine solution, shake it at 100rpm, 30℃ The bed was shaken and impregnated for 24 hours.
[0035] The wet film that has been immersed and composited is taken out and dried naturally in the air to prepare a bacterial cellulose / polydopamine / polyethyleneimine film.
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