Bionic alginate composite antimicrobial dressing and preparation method thereof
A technology of compounding antibacterial and alginic acid, applied in the fields of medical science, bandages, absorbent pads, etc., can solve the problems of difference and poor long-term release effect, achieve simple and controllable process, good product transformation feasibility, and improve liquid absorption performance effect
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Embodiment 1
[0022] The preparation steps of a kind of bionic alginic acid-based composite antibacterial dressing of the present invention are as follows:
[0023] The alginic acid component is composed of sodium alginate and calcium alginate; the chitosan component is carboxymethyl chitosan; and the silver ion component is silver nitrate. Among them, the molecular weights of sodium alginate, calcium alginate and carboxymethyl chitosan are 80,000, 30,000, and 200,000 Daltons, respectively.
[0024] Weigh 9g of alginic acid component (mass ratio of sodium alginate: calcium alginate is 8:1), 0.9g of carboxymethyl chitosan, 0.1g of silver nitrate, mix the above three powders, add deionized water 300ml, stirred at room temperature for 3 hours and fully mixed, so that the silver ions were fully chelated on the polysaccharide molecular chain; the resulting mixed hydrogel was placed at -20°C and repeatedly frozen and thawed for 3 times; finally freeze-dried to obtain a biomimetic alginic acid-bas...
Embodiment 2
[0026] The preparation steps of a kind of bionic alginic acid-based composite antibacterial dressing of the present invention are as follows:
[0027] The alginic acid component is composed of potassium alginate and calcium alginate; the chitosan component is carboxymethyl chitin; the silver ion component is nano silver. Among them, the molecular weights of potassium alginate, calcium alginate and carboxymethyl chitin are 100,000, 20,000, and 150,000 Daltons, respectively.
[0028] Weigh 8g of alginic acid component (mass ratio of potassium alginate: calcium alginate is 5:1), 1.5g of carboxymethyl chitin, 0.5g of silver nitrate, mix the above three powders, add 300ml of deionized water , stirred at room temperature for 2 hours and fully mixed, so that the silver ions were fully chelated on the polysaccharide molecular chain; the resulting mixed hydrogel was placed at -20°C and repeatedly frozen and thawed twice; finally, it was freeze-dried to obtain a bionic alginate-based co...
Embodiment 3
[0030] The preparation steps of a kind of bionic alginic acid-based composite antibacterial dressing of the present invention are as follows:
[0031] The alginic acid component is composed of sodium alginate and calcium alginate; the chitosan component is hydroxypropyl chitosan; and the silver ion component is sulfadiazine silver. Among them, the molecular weights of sodium alginate, calcium alginate and hydroxypropyl chitosan are 80,000, 30,000, and 100,000 Daltons, respectively.
[0032] Weigh 7.5g of alginic acid component (mass ratio of sodium alginate: calcium alginate is 5:1), 1.5g of hydroxypropyl chitosan, 1.0g of silver nitrate, mix the above three powders, add deionized 300ml of water, stirred at room temperature for 4 hours and fully mixed, so that the silver ions were fully chelated on the polysaccharide molecular chain; the resulting mixed hydrogel was placed at -20°C and repeatedly frozen and thawed 4 times; finally freeze-dried to obtain a biomimetic alginic ac...
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