Nanosilver Coated Bacterial Cellulose
First Claim
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1. A method of producing nano-silver coated cellulose fibers, comprising:
- a) preparing a suspension of cellulose fibers at a pre-selected concentration;
b) exposing the cellulose fibers to an oxidizing agent for oxidizing the cellulose fibers to form dialdehyde cellulose fibers;
c) incorporating a functional group into a backbone of the dialdehyde cellulose fibers to produce functionalized cellulose fibers, the functional group being selected from the group consisting of thio-, aldehyde, ketone and carboxylic acid;
d) exposing the functionalized cellulose fibers to an aqueous solution containing a first silver compound such that nano-silver particles are formed and bound to the cellulose backbone of the functionalized cellulose fibers; and
e) exposing the functionalized cellulose fibers with nano-silver particles bound thereto to a solution containing a second silver compound for growing the nano-silver particles to a pre-selected size.
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Abstract
Nanosilver coated bacterial cellulose nanofiber and a method of producing the nanosilver coated bacterial cellulose nanofiber. The nanosilver coated bacterial cellulose nanofiber is produced by preparing a suspension of bacterial cellulose fibers, oxidizing bacterial cellulose fibers; adding the thio-group to the polymer backbone; reacting the resulting product with silver proteinate and enhancing the nanosilver particle size. The nanosilver coated bacterial cellulose nanofibers exhibit antimicrobial properties.
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Citations
25 Claims
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1. A method of producing nano-silver coated cellulose fibers, comprising:
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a) preparing a suspension of cellulose fibers at a pre-selected concentration; b) exposing the cellulose fibers to an oxidizing agent for oxidizing the cellulose fibers to form dialdehyde cellulose fibers; c) incorporating a functional group into a backbone of the dialdehyde cellulose fibers to produce functionalized cellulose fibers, the functional group being selected from the group consisting of thio-, aldehyde, ketone and carboxylic acid; d) exposing the functionalized cellulose fibers to an aqueous solution containing a first silver compound such that nano-silver particles are formed and bound to the cellulose backbone of the functionalized cellulose fibers; and e) exposing the functionalized cellulose fibers with nano-silver particles bound thereto to a solution containing a second silver compound for growing the nano-silver particles to a pre-selected size. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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