Provided are superabsorbent materials composed of one or more water-soluble polysaccharides, such as gelling polysaccharides and gelling-compatible polysaccharides, and one or more insoluble fibers. The disclosed superabsorbent materials have a porous network structure and highly stable gelling properties as well as high absorption ratio and volume expansion capacity upon hydration or rehydration. Also provided are methods for preparing such superabsorbent materials and uses thereof.

Provided are superabsorbent materials composed of one or more water-soluble polysaccharides, such as gelling polysaccharides and gelling-compatible polysaccharides, and one or more insoluble fibers. The disclosed superabsorbent materials have a porous network structure and highly stable gelling properties as well as high absorption ratio and volume expansion capacity upon hydration or rehydration. Also provided are methods for preparing such superabsorbent materials and uses thereof.

Provided are superabsorbent materials composed of one or more water-soluble polysaccharides, such as gelling polysaccharides and gelling-compatible polysaccharides, and one or more insoluble fibers. The disclosed superabsorbent materials have a porous network structure and highly stable gelling properties as well as high absorption ratio and volume expansion capacity upon hydration or rehydration. Also provided are methods for preparing such superabsorbent materials and uses thereof.

The present disclosure provides a coaxial fiber comprising a cellulose fiber exterior, and a hollow interior, wherein the aerogel occupies the hollow interior of the cellulose fiber. The present disclosure also provides a method of making the coaxial fiber, and a method of maintain a temperature differential in two zones using the coaxial fibers described herein.

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 polyethylene terephthalate aerogel. There is provided a polyethylene terephthalate (PET) aerogel comprising a porous network of cross-linked recycled PET fibers, wherein the PET aerogel has a thermal conductivity of 0.030-0.050 W/m K. There is also provided a method of forming the PET aerogel.

A high-strength network structured nano-carrier material and a preparation method and application thereof. A nano-cellulose solution and graphene are mixed and ultrasonication is performed in an ultrasonic pulverizer to obtain a nano-cellulose/graphene suspension. The suspension with a phenolic resin adhesive is mixed and stirred to obtain a nano-cellulose/graphene/phenolic resin suspension. The nano-cellulose/graphene/phenolic resin suspension is injected into a mold. The mold is placed in a freeze dryer for freezing and vacuum dried in two stages to obtain a nano-cellulose/graphene/phenolic resin aerogel. The aerogel is preheated and cured in a muffle furnace, then subjected to a high-temperature thermal decomposition treatment in a tube furnace to obtain a nano-carrier material having a high-strength network structure. The preparation method is simple and convenient, low in cost, environmentally friendly and green. The obtained carrier material has a good water resistance and a high mechanical property, and can carry more active substances.

Environmentally friendly, sustainable, and high-performance ultralight composite foams are disclosed. The composite foams are prepared from cellulose nanomaterial, polymeric material, and a crosslinking agent. The fabrication process is simple and uses only water. The composite foams exhibit an elastic strain exceeding the values reported for known nanocellulose-based foams with no reinforcement. The foams exhibit a thermal conductivity superior to that of traditional insulating materials and retain structural integrity after burning.

Disclosed is a method for preparing a bilayer scaffold through single process comprising: preparing a first polymer aqueous solution; adding a second polymer into the first polymer aqueous solution and stirring a reactant; adding a surfactant into the stirred reactant and stirring the reactant at high temperature and high speed; freeze-drying the stirred reactant thereby obtaining a sponge; dipping the sponge in a cross-linking agent thereby rendering be cross-linked; and freeze-drying the cross-linked reactant.

A method for making an aerogel includes the steps of a) soaking a wet gel having a liquid phase in at least one solvent to substantially replace the liquid phase in the wet gel with the solvent to form a soaked gel; b) freezing the soaked gel to form a frozen gel; and c) drying the frozen gel in a vacuum chamber to form an aerogel.