Chitosan compositions
AssigneeThe Procter & Gamble Company
InventorsGordon Robert Davison, Axel Konig, Clyde Gibbons, Mark Brian Ripley, Neil Archibald MacGilp, Georgina Lyndsey Claire Milich, Emma Louise Pretswell
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Abstract
Compositions comprising chitosan in the form of a network of nano-sized fibres. There is also provided a process for making such compositions. The compositions have improved solubility and activity. The compositions are useful in hair care, skin care, odour control, wound care, blood management, sanitary compositions, oral care, film formation, hard surface treatment, fabric treatment, release of hydrophobic or hydrophilic materials, plant care, water purification and drug delivery.
Claims20
A composition comprising chitosan in the form of a network of nano-sized fibers having an interstitial space as determined by cryogenic transmission electron microscopic imaging of at least about 80%.
A composition comprising chitosan in the form of a network of nano-sized fibers, wherein said chitosan has a water retention value of at least about 3000 percent.
A process for making a chitosan composition in the form of a network of nano-sized fibers comprising the steps of:
- (a) dissolving chitosan in aqueous acid to form an aqueous chitosan solution;
- (b) partially neutralizing said aqueous chitosan solution with a neutralizing agent;
- (c) precipitating said aqueous chitosan solution with said neutralizing agent to form a chitosan suspension;
- and,
- (d) homogenizing said chitosan suspension with a high shear forming a homogenized chitosan suspension thereby.
Dependencies are inferred from the claim text.