Nanosilver coated bacterial cellulose
AssigneeAxcelon Biopolymers Corporation
InventorsWankei Wan, Ganesh Guhados
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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.
Claims23
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;
- and
- d) exposing the functionalized cellulose fibers to an aqueous solution containing a silver proteinate such that nano-silver particles are formed and bound to the cellulose backbone of the functionalized cellulose fibers.
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 exhibiting a positive chemical interaction with silver;
- and
- d) exposing the functionalized cellulose fibers to an aqueous solution containing a silver proteinate such that nano-silver particles are formed and bound to the cellulose backbone of the functionalized cellulose fibers.
Dependencies are inferred from the claim text.