Nanofiber membrane and preparation method thereof
A nanofiber film and nanofiber technology, applied in fiber treatment, fiber chemical characteristics, rayon manufacturing, etc., can solve the problems of reducing antibacterial effect, small nano silver particles, easy aggregation, etc., to increase the bactericidal effect and drug effect time, the effect of avoiding allergic reactions
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Embodiment 1
[0058] The preparation method of the nanofibrous membrane of the present embodiment comprises the following steps:
[0059] (1) Dissolve 0.180 g (1 mmol) of glucose and 0.176 g (1 mmol) of L-ascorbic acid into 20 mL of distilled water and 10 mL of ethanol mixture, stir evenly, transfer to a 50 mL polytetrafluoroethylene reactor, 120 °C for 4 h, then cooled down to room temperature naturally. Take the supernatant by centrifugation to obtain a carbon quantum dot solution;
[0060] (2) Prepare 100 mL of tris buffer solution with a concentration of 10 mM, add dilute hydrochloric acid solution to adjust the pH to 8.5, add 10 mg of dopamine hydrochloride, and stir in air for 1 h to obtain a polydopamine solution with a concentration of 0.1 mg / mL; 10 mL of polydopamine solution was added to the carbon quantum dot solution, ultrasonicated for 10 min, and stirred for 0.5 h to obtain a polydopamine film-coated carbon quantum dot solution;
[0061] (3) Slowly add 10 mL of silver nitrat...
Embodiment 2
[0065] The preparation method of the nanofibrous membrane of the present embodiment comprises the following steps:
[0066] (1) Dissolve 0.900 g (5 mmol) of glucose and 0.880 g (5 mmol) of L-ascorbic acid into a mixture of 20 mL of distilled water and 10 mL of ethanol, stir evenly, transfer to a 50 mL polytetrafluoroethylene reactor, 120 °C for 4 h, then cooled down to room temperature naturally. Take the supernatant by centrifugation to obtain a carbon quantum dot solution;
[0067] (2) Prepare 100 mL of tris buffer solution with a concentration of 10 mM, add dilute hydrochloric acid solution to adjust the pH to 8.5, add 500 mg of dopamine hydrochloride, and stir in air for 2 h to obtain a polydopamine solution with a concentration of 5 mg / mL; take 10 Add mL of polydopamine solution into the carbon quantum dot solution, sonicate for 60 min, and stir for 2 h to obtain a polydopamine film-coated carbon quantum dot solution;
[0068] (3) Slowly add 10 mL of silver nitrate solu...
Embodiment 3
[0072] The preparation method of the nanofibrous membrane of the present embodiment comprises the following steps:
[0073] (1) Dissolve 0.360 g (2 mmol) of glucose and 0.352 g (2 mmol) of L-ascorbic acid into 20 mL of distilled water and 10 mL of ethanol mixture, stir evenly, transfer to a 50 mL polytetrafluoroethylene reactor, 120 °C for 4 h, then cooled down to room temperature naturally. Take the supernatant by centrifugation to obtain a carbon quantum dot solution;
[0074] (2) Prepare 100 mL of tris buffer solution with a concentration of 10 mM, add dilute hydrochloric acid solution to adjust the pH to 8.5, add 100 mg of dopamine hydrochloride, and stir in air for 2 h to obtain a polydopamine solution with a concentration of 1 mg / mL; 10 mL of polydopamine solution was added to the carbon quantum dot solution, ultrasonicated for 30 min, and stirred for 1 h to obtain a polydopamine film-coated carbon quantum dot solution;
[0075] (3) Slowly add 10 mL of silver nitrate s...
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