Chitosan-containing activated carbon fiber surgical dressing and preparation method thereof
A technology of activated carbon fiber and chitosan, which is applied in the field of medical biopolymer materials, can solve the problems of not overcoming the hydrophobicity of chitosan molecule brittle carbon fiber, poor mechanical properties of pure chitosan film, and limited use range, etc. The effect of widening the adsorption range, improving mechanical properties and excellent softness
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Embodiment 1
[0029] (1) Activation of ACF: with 2% NaHCO 3 As the electrolyte, the cleaned activated carbon fiber felt (ACF) is used as the anode, and the stainless steel bar is used as the cathode. 2 Electrolyzed for 90 s under the current intensity to make ACF undergo anodic oxidation. Then take out the ACF, rinse it with clean water, and dry it at 110°C;
[0030] (2) Flexible modification of chitosan: 1 mol of mPEG was added to a tank containing dimethyl sulfoxide (DMSO) and chloroform (CHCl 3 ) in a four-necked flask of anhydrous mixed solution (90 / 10, v / v), after DMSO was completely dissolved, acetic anhydride (Ac 2 O) 12 mol at room temperature and N 2 Under the protection of the reaction for 24 h. After the reaction, the mixture was added to excess cold ether for precipitation, and the crude product was dissolved in a small amount of chloroform and then precipitated with cold ether. After repeating this twice, the hydroformylated mPEG was obtained by suction filtration under red...
Embodiment 2
[0034] (1) Activation of ACF: with 5% NH 4 HCO 3 · NH 2 COONH 2 As the electrolyte, the cleaned activated carbon fiber cloth (ACF) is used as the anode, and the stainless steel bar is used as the cathode. 2 Electrolyzed for 120 s under the current intensity to make ACF anodic oxidation. Then take out the ACF, rinse it with clean water, and dry it at 100°C;
[0035] (2) Flexible modification of chitosan: Weigh 2.0 g chitosan (CS) and add 20 mL methanesulfonic acid, and stir magnetically at 5 °C for 30 min. Then add 0.15 g of polyvinylpyrrolidone (PVP) and 100 mL of 0.8% glacial acetic acid solution in sequence, and continue magnetic stirring at 60°C for 2 h, then remove the insoluble matter and impurities in the solution by suction filtration, and let stand for 12 hours to defoam stand-by.
[0036](3) Membrane loading: Take an appropriate amount of anodized activated carbon fiber cloth and soak it in 1g / L of the above mixture for 1 h, take it out and place it in a blast ...
Embodiment 3
[0038] (1) Activation of ACF: with 1% H 3 PO 4 As the electrolyte, the cleaned activated carbon fiber paper (ACF) is used as the anode, and the stainless steel bar is used as the cathode. At the electrolysis temperature of 30°C and 1.3 mA / cm 2 Electrolysis was carried out for 100 s under the current intensity to make ACF undergo anodic oxidation. Then take out the ACF, rinse it with clean water, and dry it at 100°C;
[0039] (2) Flexible modification of chitosan: Weigh 0.6 g of sodium alginate and add it to 50 mL of 1% glacial acetic acid solution; add 1.5 g of chitosan to 20 mL of methanesulfonic acid and stir magnetically at 5°C for 30 min, and then added to 30 mL of 1% glacial acetic acid solution. Both solutions were allowed to stand overnight, and then sodium alginate solution was added to the chitosan solution under stirring, and the stirring was continued for 4 h.
[0040] (3) Membrane load: Take an appropriate amount of anodized activated carbon fiber paper and soa...
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