A biopolymer is disclosed that comprises a polydeoxyribonucleotide (PDRN), or a derivative or modification thereof, having a molecular weight in the range of 400 kDa to 3200 kDa, and an anionic and ampholytic heteropolysaccharide having sulfate and carboxyl groups and a molecular weight in the range of 14 MDa and 16 MDa, in which the polydeoxyribonucleotide and the heteropolysaccharide are crosslinked by genipin or an analogue or derivative thereof. Furthermore, the invention relates to methods of producing such biopolymer and uses thereof.

Provided is a method of preparing a superabsorbent polymer, in which an interpenetrating polymer network (IPN) is formed on the surface of the superabsorbent polymer during formation of a surface-crosslinked layer of the superabsorbent polymer, thereby improving physical properties of the superabsorbent polymer.

The disclosure generally relates to poly alpha-1,3-glucan compositions and articles containing them. In particular interest is comprising poly alpha-1,3-glucan ester derivatives. The poly alpha-1,3-glucan derivatives are useful in thermoprocesses and in particular, injection molding processes.

Films compositions for packaging and delivering a foodstuff, pharmaceutical, industrial, manufacturing and agricultural materials and uses are disclosed. The film can be formed from at least one biodegradable film forming agent, and at least one biodegradable plasticizer. The resulting film can be formed and shaped to a variety of film package configurations and can have multi compartments. The resulting films and film packages can be edible and substantially and/or completely soluble in a cold, cool, warm and/or hot hydro-liquid including water. The film forming agent(s) is compostable and the film has an essential absence of petrochemicals and non-biodegradable plastics/bioplastics.

Compositions are disclosed herein comprising a graft copolymer that comprises: (i) a backbone comprising dextran that has been modified with about 1%-25% alpha-1,2 branches, and (ii) one or more alpha-1,3-glucan side chains comprising at least about 50% alpha-1,3 glycosidic linkages. Further disclosed are reactions for producing such graft copolymers, as well as their use in derivatives, films and various other applications.

The present invention relates to a novel stable colloidal polysaccharide suspension containing α(1.fwdarw.3)-glucan, a cost-effective method for its preparation, and possible uses of these polysaccharide suspensions.

The present invention includes a hydrogel and a method of making a porous hydrogel by preparing an aqueous mixture of an uncrosslinked polymer and a crystallizable molecule; casting the mixture into a vessel; allowing the cast mixture to dry to form an amorphous hydrogel film; seeding the cast mixture with a seed crystal of the crystallizable molecule; growing the crystallizable molecule into a crystal structure within the uncrosslinked polymer; crosslinking the polymer around the crystal structure under conditions in which the crystal structure within the crosslinked polymer is maintained; and dissolving the crystals within the crosslinked polymer to form the porous hydrogel.

A protein/polysaccharide/essential oil nano-edible film. The essential oil nano-edible film includes the following raw materials in parts by weight: 1-8 parts of a quinoa protein-Atrina pectinata polysaccharide nanocomposite, 2-11 parts of an Atrina pectinata polysaccharide-essential oil nanocomposite, 1-12 parts of a quinoa protein, 2-16 parts of Atrina pectinata polysaccharide, and 5-53 parts of water. The present invention helps to solve the problem, in a conventional protein film, of the loss of flavor and even toxic side effects caused by the adding of a plasticizer and a crosslinking agent to improve the mechanical strength, the use of a lipid substance that has the capability to easily form a dense molecular network structure to improve the water and gas barrier properties, and the migration of an additive, the plasticizer, or a polymer degradation by-product thereof generated in reaction, and a solvent remaining in the polymerization reaction from the film to food.

Microencapsulation methods are provided using encapsulant, fiber or film forming compositions of a cross-linkable anionic polymer, a multivalent cation salt, a chelating agent, and a volatile base. During the formation of this composition, the generally acidic chelating agent is titrated with a volatile base to an elevated pH to improve ion-binding capability. Multivalent cations are sequestered in cation-chelate complexes. Cross-linkable polymers in this solution will remain freely dissolved until some disruption of equilibrium induces the release of the free multivalent cations from the cation-chelate complex. Vaporization of the volatile base drops the pH of the solution causing the cation-chelate complexes to dissociate and liberate multivalent cations that associate with the anionic polymer to form a cross-linked matrix. During spray-drying, the formation of a wet particle, polymer cross-linking, and particle drying occur nearly simultaneously.

A method of preparing a hydrogel product including crosslinked glycosaminoglycan molecules, said method including: i) providing a glycosaminoglycan crosslinked by amide bonds, wherein the crosslinked glycosaminoglycans include residual amine groups; and ii) acylating residual amine groups of the crosslinked glycosaminoglycans provided in i) to form acylated crosslinked glycosaminoglycans.