A subtractive method for structuring a hydrogel, comprising the following steps: producing a hydrogel layer containing benzophenone (3) on a substrate (6), the hydrogel not having any photocleavable group; bringing the hydrogel layer into contact with an oxygen tank (4); selectively illuminating the hydrogel layer with a light (5) capable of activating the benzophenone in order to convert the illuminated zone of the hydrogel layer into a liquid; and eliminating the liquid.

The technology relates to a 3D printed hydrogel formed from a maleimide containing polymer cross-linked using a bis-thiol containing cross-linking agent having at least two thiol functional groups, processes for preparing the 3D printed hydrogel, and uses thereof.

The present invention is intended to provide an ultrafine cellulose fiber-containing wet sheet, which is easily handled upon the use thereof and is excellent in terms of adhesiveness to the skin. The present invention relates to a sheet comprising cellulose fibers having a fiber width of 1000 nm or less and water, wherein the sheet is gelatinous, the cellulose fibers have ionic substituents, the water content percentage is 70% by mass or more with respect to the total mass of the sheet, and the tensile strength is 0.08 MPa or more.

Provided is a resin composition for a foam that may include a base resin having a reactive silicon group (A), a chemical foaming agent (B), and a silanol condensation catalyst (D), wherein the chemical foaming agent (B) comprises a dicarbonate diester (B-1). Further provided is a method for producing a foam, that may include: a mixing step of mixing a liquid, which may include a base resin having a reactive silicon group (A) and a dicarbonate diester (B-1), with a silanol condensation catalyst (D) to obtain a mixed liquid, wherein in the mixed liquid, a rate of foaming effected by decomposition of the dicarbonate diester (B-1), and a rate of a curing reaction of the mixed liquid effected by a reaction between the reactive silicon groups may each be adjusted, such that a foam having an expansion ratio of 2-fold or more and 60-fold or less is obtained.

There is provided an adhesion prevention film having excellent adhesive property and capable of improving adhesion effects on mucous membrane, which is manufactured by the method including processes of mixing an adhesion prevention composition, which includes distilled water, polyethylene oxide (PEO), and alginate, casting the mixed adhesion prevention composition and freeze-drying, to make a sponge-type film, compressing the sponge-type film, and irradiating one or more light sources selected from radioactive rays, electron beam, gamma rays, and ultraviolet rays on the compressed film to cross-link the film, in which a sponge-type film is first made by freeze-drying after casting the adhesion prevention composition, and then, the adhesion prevention film is made by cross-linking the freeze-dried film by compressing the film, thereby to provide the adhesion prevention film showing excellence in mechanical strength, flexibility, adhesive property, cytotoxicity, biodegradability, biocompatibility, adhesion prevention property, and the like.

The present invention provides a multi plate screw press sludge dewatering machine and a helical shaft thereof. The multi plate screw press sludge dewatering machine includes fixed rings, movable rings, the helical shaft, a sludge inlet tank and a sludge discharging tank; the helical shaft adopts a variable diameter variable pitch helical shaft, a lead angle arrangement sequence of a helical blade of the whole helical shaft is gradual reduction from the sludge discharging tank to the sludge inlet tank, and the lead angle arrangement sequence is gradually reduced from 16°-22° to 6°-14°; a pitch of the helical shaft is gradually increased along a direction from the sludge inlet tank to the sludge discharging tank; a diameter of a shaft body of the helical shaft is gradually increased along with a direction of the sludge discharging tank from a ⅓ position of a shaft length; and blockage prevention plates are arranged on two sides of the bottom of the helical blade. The helical shaft in the present invention is specially designed, so that the pitch is more reasonable, a helical angle is gentler, frictional resistance when sludge passes through the helical shaft may be effectively reduced, and phenomena of shaft blockage and shaft sticking of the sludge may be reduced.

This invention relates to providing a resin composition and a resin molded article having sufficient mechanical properties and thermal properties, and also having excellent wear resistance and moldability when in use. This invention provides a cellulose nanofiber-containing aqueous dispersion including (A) cellulose nanofibers, (B) a surface treatment agent, and water. In one embodiment, (B) a surface treatment agent has an HLB value of 0.1 or greater but less than 8.0. This invention provides a dispersion liquid including (B) a surface treatment agent, (D) a binder component, and water, wherein (B) the surface treatment agent is a water-soluble polymer having a hydrophilic segment and a hydrophobic segment, and having a number average molecular weight of 200 to 30,000, and (D) the binder component is polyurethane. This invention provides a cellulose nanofiber resin composition including (A) cellulose nanofibers, (B) a surface treatment agent, and (F) a thermoplastic resin.

The present disclosure relates generally to a particulate product. The particulate product comprises coarse particles of a nonionic synthetic associative thickener (NSAT) rheology modifier. The NSAT rheology modifier is selected from the group consisting of hydrophobically-modified ethoxylated urethane (HEUR), hydrophobically-modified polyacetal-polyether (HMPAPE), and combinations thereof. The particulate product is incorporated into a waterborne paint formula.

Provided herein are compositions comprising: a scaffold polymer having one or more acryloyl groups or one or more methacryloyl groups; optionally a porogen and a crosslinking agent, compositions that upon crosslinking form a hydrogel for use in cell encapsulation and methods for immunocytochemistry of encapsulated cells. Scaffold polymers used are selected from: Poly(ethylene glycol) diacrylate (PEGDA); Poly(ethylene glycol) dimethylacrylate (PEGDMA); Poly(ethylene glycol) methyl ether acrylate (PEGMEA); Poly(ethylene glycol) methacrylate (PEGMA); and Poly(ethylene glycol) methyl ether methacrylate (PEGMEMA), and porogens selected from: Poly(ethylene glycol) (PEG); Chitosan; Agarose; Dextran; Hyaluronic acid; Poly(methyl methacrylate) (PMMA); Cellulose and derivatives thereof; Gelatin and derivatives thereof; and Acrylamide and derivatives thereof. The invention also provides, at least in part, compositions for forming a porous hydrogel around a cell suitable for immunostaining of cells within the hydrogel.

A polyimide precursor-containing aqueous composition contains at least one polymer material selected from the group consisting of a water-insoluble fibrous organic substance and a polyalkylene oxide having a viscosity-average molecular weight of 5 million or more, a polyimide precursor, particles, and water.