Method of preparing a porous material includes preparing a mixture of from about 10 to about 30% by mass of a matrix material, from about 20 to about 60% by mass of a plurality of particles, from about 20 to about 60% by mass of a porogen, and from about 1 to about 10% by mass of an interfacial compatibilizer. The matrix material and the porogen may be selected so as to be phase separated in the mixture. The method may further include placing the mixture into a form; initiating a solidification of the matrix material during which the porogen remains nonvolatile and the matrix material and the porogen remain phase separated; and removing at least a portion of the porogen to obtain the porous material. Porous materials produced by the methods. Microfluidic channels produced by the methods.

The present invention relates to a polyvinyl alcohol hydrogel having an asymmetric pore size. the pore size of the upper surface of the polyvinyl alcohol hydrogel is 1-30 μm, the pore size of lower surface thereof is 50-300 μm, and the pore size of the hydrogel gradually increases from the upper surface to the lower surface. The polyvinyl alcohol hydrogel in the present invention has excellent biocompatibility, and has functions of blocking bacteria, anti-adhesion, the absorption of exudate, promoting wound healing, observing in situ of wound healing process and the like.

An exemplary embodiment of the present disclosure provides a membrane including a supporting base layer, which can be permeable, and a dual layer oxygen barrier film disposable over the supporting base layer. The supporting barrier film can include a polymeric or paper-based material. The dual layer oxygen barrier film can include a chitin material and a cellulosic material. The cellulosic material of the dual layer oxygen barrier film can be the same material as the permeable membrane or can be any other cellulosic material

This invention discloses an injectable nanocomposite gel composition and the method of making the composition. The composition is composed of amphiphilic alginate nanoparticle, gel stabilizer, gel crosslinker, and gel structural modifiers. The nanocomposite gel can be manufactured into a form of highly-viscous gel or a solid-like gel, used as a vehicle to carry and deliver pharmaceutically active ingredients with high drug load via injection administration for medical uses.

Textile compositions comprising at least one filamentous fungus are disclosed, as are methods for making and using such textile compositions. Embodiments of the textile compositions generally include at least one of a plasticizer, a polymer, and a crosslinker, in addition to the filamentous fungus. The disclosed textile compositions are particularly useful as analogs or substitutes for conventional textile compositions, including but not limited to leather.

Some embodiments of the disclosure provide a polymer film used for a biosensor. The polymer film has a three-dimensional network structure formed by a natural high-molecular polymer and a synthetic high-molecular polymer by a plurality of crosslinking modes. The three-dimensional network structure includes a chemically crosslinked network and a reversible physically crosslinked network, the chemically crosslinked network being formed by covalent bond crosslinking and the reversible physically crosslinked network being formed by ionic bond crosslinking. The chemically crosslinked network has covalent bond crosslinking between the synthetic high-molecular polymers and covalent bond crosslinking between the natural high-molecular polymer and the synthetic high-molecular polymer. The physically crosslinked network has ionic bond crosslinking between natural high-molecular polymers.

A composite material is formed by combining an expandable polymer having a charge with another polymer having an opposite charge to produce. In particular, the composite material can be prepared by combining the polymers with a medium such as and water, and expanding the mixture using a treatment that expands the mixture to produce, for example, insoluble porous foam-like composite

What is provided is a method for producing a composite-particle composition including a first step of obtaining a dispersion liquid of fine fibers; a second step of coating a surface of liquid droplets of a polymerizable monomer or a polymer with the fine fibers in the dispersion liquid to stabilize the liquid droplets as an emulsion; a third step of polymerizing the liquid droplets of the polymerizable monomer or the polymer to obtain composite particles including the polymer coated with the fine fibers; and a fourth step of adsorbing a compound that forms an ionic bond in a pair with an ionic functional group of the fine fibers onto the fine fibers in the surface of the composite particles.

Described are a self-healing composition, and a preparation method for and an application of the composition. The composition is of a core-shell structure; the core contains a hydrogenated styrenic thermoplastic elastomer polymer and an inorganic filler; the shell contains a hydrophilic polymer; the composition has a density of 1.2-2 g/cm.sup.3, a water contact angle of no more than 90°, and a diesel oil and/or natural gas absorption expansion ratio of 5-15 times. By coating the hydrogenated styrenic thermoplastic elastomer and the inorganic filler with the hydrophilic (surface polarized) polymer, a core-shell structure is formed. When the composition is used for well cementing in an oil/gas field, the composition has a density and compatibility matching cement mortar and thus can form a uniform and stable cement slurry for well cementing in the oil/gas field, and has excellent oil/gas absorption expansion performance and thus can expand after absorbing oil/gas to perform self-healing.

Methods of forming cross-linked polysaccharides are disclosed in which one or more polysaccharides are dissolved in solution, gelled, modified to have a desired concentration, and subsequently irradiated. The irradiation of the gel crosslinks the polysaccharide(s) present. The disclosed techniques may be applied to various polysaccharides, including but not limited to agarose and/or hyaluronic acid.