Insoluble Polysaccharide Foams
AssigneeThe Penn State Research Foundation
InventorsJeffrey M. Catchmark, Ke Liu, Kai Chi, Jingxuan Yang
Life of this patent
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Abstract
An insoluble foam composite material is formed by a mixture combining an anionic polysaccharide, a cationic polysaccharide, a solvent, and a plasticizer. In particular, the composite material can be prepared by heating, freezing and lyophilizing the mixture to produce, for example, insoluble porous foam-like composites.
Claims19
An insoluble composite material formed by:
- creating a mixture of at least one anionic polysaccharide, at least one cationic polysaccharide, at least one plasticizer, and at least one solvent;
- heating the mixture;
- pouring the mixture into a mold;
- freezing the mixture;
- and
- lyophilizing the mixture.
An insoluble composite material formed by:
- creating a mixture containing at least one anionic polymer, at least one cationic polymer, and at least one solvent;
- exposing the mixture to an elevated temperature to reduce the content of the solvent to solidify the mixture;
- soaking the solid mixture in a second solution containing a plasticizer;
- freezing the mixture;
- and
- lyophilizing the mixture.
An insoluble composite material formed by:
- creating a mixture containing at least one anionic polysaccharide, at least one cationic polysaccharide, and at least one solvent;
- exposing the mixture to an elevated temperature to reduce the content of the solvent to solidify the mixture;
- soaking the solid mixture in a second solution containing a plasticizer;
- freezing the mixture;
- and
- lyophilizing the mixture.
An insoluble composite material formed by:
- creating a mixture containing at least one non-gelatinized anionic starch, at least one chitosan, and at least one aqueous solvent;
- exposing the mixture to an elevated temperature to gelantinize the starch and reduce the content of the solvent to solidify the mixture;
- soaking the solid mixture in a second solution containing a plasticizer;
- freezing the mixture;
- and
- lyophilizing the mixture.
An insoluble composite material formed by:
- creating a mixture containing at least one non-gelatinized anionic starch, at least one chitosan, and at least one aqueous solvent;
- heating the mixture to partially gelantinize the at least one non-gelatinized anionic starch;
- pouring the mixture into a mold;
- freezing the mixture;
- and
- lyophilizing the mixture.
An insoluble composite material formed by:
- creating a mixture containing at least one anionic polysaccharide, at least one cationic polysaccharide, and at least one solvent;
- heating the mixture to reduce solvent content in the mixture and to form a solid mixture;
- soaking the solid mixture in a second solution containing a plasticizer and a charged polysaccharide;
- freezing the mixture;
- and
- lyophilizing the mixture.
An insoluble composite material formed by:
- creating a mixture containing at least one anionic polysaccharide, at least one cationic polysaccharide, and at least one solvent;
- heating the mixture to reduce solvent content in the mixture and to form a solid mixture;
- soaking the solid mixture in a second solution containing a plasticizer and an antiseptic agent (e.g., antiseptic molecule such as PHMB);
- freezing the mixture;
- and
- lyophilizing the mixture.
An insoluble composite or coating material comprising a mixture of at least one anionic polysaccharide, at least one cationic polysaccharide, and a solvent and a plasticizer.
A method for producing a composite or coating composition, wherein the method comprises:
- combining one or more anionic polysaccharides, one or more cationic polysaccharides, a plasticizer, and a solvent to obtain a solution,
- heating the solution,
- freezing the mixture;
- and
- lyophilizing the mixture.
Dependencies are inferred from the claim text.