A curable aqueous composition is disclosed comprising a carbohydrate, a crosslinking agent, and an amine base, wherein the curable aqueous composition has a pH adjusted by the amine base. Further disclosed is a method of forming a curable aqueous solution.

A curable aqueous composition is disclosed comprising a carbohydrate, a crosslinking agent, and an amine base, wherein the curable aqueous composition has a pH adjusted by the amine base. Further disclosed is a method of forming a curable aqueous solution.

The present disclosure discloses a method for preparing dual-sensitive cellulose-based aerogel. The DAC (Dialdehyde cellulose), the DAC/PDMAEMA (poly-2-(dimethylamino)ethyl methacrylate) copolymer, the DAC/PDMAEMA/PEI (Polyethylenimine) copolymer are serially prepared, was freeze-dried to obtain a product. The product is the dual-sensitive cellulose-based aerogel, a cumulative adsorption capacity of the dual-sensitive cellulose-based aerogel is 250 mg/g, and a cumulative release amount of the dual-sensitive cellulose-based aerogel in 0.05 mol/L NaH.sub.2PO.sub.4 (pH=3-8), 0.2% NaCl (pH<3), or NaOH (pH>8) is 63-90%.

The present disclosure discloses a method for preparing dual-sensitive cellulose-based aerogel. The DAC (Dialdehyde cellulose), the DAC/PDMAEMA (poly-2-(dimethylamino)ethyl methacrylate) copolymer, the DAC/PDMAEMA/PEI (Polyethylenimine) copolymer are serially prepared, was freeze-dried to obtain a product. The product is the dual-sensitive cellulose-based aerogel, a cumulative adsorption capacity of the dual-sensitive cellulose-based aerogel is 250 mg/g, and a cumulative release amount of the dual-sensitive cellulose-based aerogel in 0.05 mol/L NaH.sub.2PO.sub.4 (pH=3-8), 0.2% NaCl (pH<3), or NaOH (pH>8) is 63-90%.

The present disclosure discloses a method for preparing dual-sensitive cellulose-based aerogel. The DAC (Dialdehyde cellulose), the DAC/PDMAEMA (poly-2-(dimethylamino)ethyl methacrylate) copolymer, the DAC/PDMAEMA/PEI (Polyethylenimine) copolymer are serially prepared, was freeze-dried to obtain a product. The product is the dual-sensitive cellulose-based aerogel, a cumulative adsorption capacity of the dual-sensitive cellulose-based aerogel is 250 mg/g, and a cumulative release amount of the dual-sensitive cellulose-based aerogel in 0.05 mol/L NaH.sub.2PO.sub.4 (pH=3-8), 0.2% NaCl (pH<3), or NaOH (pH>8) is 63-90%.

A resin composition containing a nanocellulose and a polymer of an ethylenically unsaturated monomer, wherein the nanocellulose contains an oxide of a cellulose raw material by a hypochlorous acid or a salt thereof, is substantially free of a N-oxyl compound, and satisfies following (I) and/or (II): (I) zeta potential is 30 mV or less; and (II) light transmittance in a mixed solution in which the nanocellulose and water are mixed and which has a solid content concentration of 0.1 mass % is 95% or more.

A resin composition containing a nanocellulose and a polymer of an ethylenically unsaturated monomer, wherein the nanocellulose contains an oxide of a cellulose raw material by a hypochlorous acid or a salt thereof, is substantially free of a N-oxyl compound, and satisfies following (I) and/or (II): (I) zeta potential is 30 mV or less; and (II) light transmittance in a mixed solution in which the nanocellulose and water are mixed and which has a solid content concentration of 0.1 mass % is 95% or more.

A method for preparing anisotropic cellulose-based hydrogel is provided. The method comprises ammoniating the dialdehyde cellulose obtained by oxidizing cellulose using sodium periodate to obtain ammoniated cellulose derivatives; performing Schiff reaction using the ammoniated cellulose derivatives and dopamine to obtain cellulose-based nanosheets; depositing Fe.sub.3O.sub.4 nanoparticles on a surface of the cellulose-based nanosheets by a deposition method to obtain magnetic cellulose-based nanosheets; and forming the anisotropic cellulose-based hydrogel using the magnetic cellulose-based nanosheets by a polymerization method.

A method for preparing anisotropic cellulose-based hydrogel is provided. The method comprises ammoniating the dialdehyde cellulose obtained by oxidizing cellulose using sodium periodate to obtain ammoniated cellulose derivatives; performing Schiff reaction using the ammoniated cellulose derivatives and dopamine to obtain cellulose-based nanosheets; depositing Fe.sub.3O.sub.4 nanoparticles on a surface of the cellulose-based nanosheets by a deposition method to obtain magnetic cellulose-based nanosheets; and forming the anisotropic cellulose-based hydrogel using the magnetic cellulose-based nanosheets by a polymerization method.

Covalently cross-linked copolymers are described herein. More specifically, polysaccharide-polyamine copolymeric matrices or structures and cationic copolymeric matrices are described herein. The polysaccharide-polyamine copolymers, when protonated, can form cationic copolymeric matrices having exceptionally high densities of cationic sites. In one form, the covalently cross-linked copolymers provide a three-dimensional structure, especially when hydrated.