Methods for producing silver-bonded antimicrobial moist wound dressings and moist wound dressings produced by the methods
AssigneeCellulose Concepts, LLC
InventorsYoong-Soo Kim, Ju-Young Kim
Life of this patent
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Abstract
A method for producing a silver-bonded antimicrobial moist wound dressing. A silver-containing compound is added to a 0.1-30% aqueous solution of an alkaline solvent to dissociate silver ions from the silver-containing compound, dissolving CMC in water or an organic solvent to obtain a CMC solution, the silver ion-containing solution is mixed with the CMC solution so that the hydrogen ions (H+) of the hydroxyl groups of the CMC are replaced by the silver ions to prepare a silver-CMC compound, the silver-CMC compound is dispersed and absorbed in a medium, and the medium is dried.
Claims4
A method for producing a silver-bonded antimicrobial moist wound dressing, comprising the steps of:
- adding silver chloride (AgCl) to a 0.1-30% NH4OH aqueous solution to dissociate silver ions from the silver chloride to obtain a silver-ion containing solution, wherein the silver chloride is added in an amount of 0.00001% to 20.0% (w/v);
- dissolving sodium carboxymethyl cellulose (C6H9OCH2COONa, CMC-Na) in water or an organic solvent to obtain a CMC solution, wherein the concentration of the CMC solution ranges between 2% and 15% (w/v);
- mixing the silver ion-containing solution with the CMC solution so that the hydrogen ions (H+) of the hydroxyl groups of the CMC are replaced by the silver ions to prepare a silver-CMC compound;
- wherein, after mixing, the solutions are maintained at a temperature of 20° C. to 50° C. for 10 seconds to 1 hour;
- and
- wherein the amount of the CMC ranges between 0.005 g/ml and 0.035 g/ml of the silver ion-containing solution;
- dispersing and absorbing the silver-CMC compound in a medium;
- and
- drying the medium.
Dependencies are inferred from the claim text.