Embodiments disclosed herein are directed to membranes for filtration, methods of manufacturing the same, and membrane modules incorporating the same. In an embodiment, a membrane is disclosed. The membrane includes a porous cellulose layer, a polyamide thin film layer bonded to the porous cellulose layer, and a fabric support layer that supports the porous cellulose layer and the polyamide thin film layer. The porous cellulose layer has a pore size of about 30 nm to about 500 nm at an exposed surface of the porous cellulose layer.

A light-blocking article is designed to be lightweight but effective to block most incident actinic radiation and can be designed into fabrics, curtains, and other materials. Such an article has an opacifying layer that is capable of blocking predetermined electromagnetic radiation. The article contains (a) porous particles comprising a continuous polymeric binder and pores within the continuous polymeric binder, the porous particles having a glass transition temperature of at least 25° C. and a mode particle size of at least 2 μm and up to and including 50 μm. The article also contains an opacifying colorant that absorbs the predetermined electromagnetic radiation (such as within 400 nm to 700 nm), in an amount of at least 0.001 weight % based on the total dry weight of the opacifying layer, and a matrix polymer in which the porous particles and opacifying colorant are dispersed.

Disclosed are cellulose-based 5 flexible aerogels and xerogels containing bacterial cellulose nanorods, ribbons, fibers, and the like, wherein the gels have tunable optical, heat transfer, and stiffness properties. Further disclosed are highly transparent and flexible cellulose nanofiber-polysiloxane composite aerogels featuring enhanced mechanical robustness, tunable optical anisotropy, and low thermal conductivity.

The present invention concerns a homogenous polymer mixture comprising a polymer composition that comprises at least one cellulose ester polymer, which is cellulose acetate propionate (CAP), and at least one other polymer selected from the group consisting of polybutylene succinate (PBS) and polypropylene succinate (PPS), wherein the total amount of said cellulose ester polymer and said at least one other polymer is at least 80 wt. % based on the total weight of the polymer composition. The invention also concerns a method and use related thereto.

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.

The present invention relates to new methods for crosslinking a polysaccharide with a bifunctional poly(ethylene glycol). The invention further includes the polymer hydrogels which can be produced using these methods, compositions comprising the polymer hydrogels and methods of use thereof.

Films comprising a layer including a cellulose ester and a layer including an acrylic coating are provided. Polarizing sheets comprising the films are also provided. In addition, methods of making the films and polarizing sheets are provided.

The invention relates to a method for the preparation of a polymer gel, comprising cross-linking a polymer by using a cyclic dianhydride of carboxylic acid as cross-linking agent and treating the polymer gel with bicarbonate. The invention further concerns the polymer gel obtainable by the method of the invention and the uses thereof in various applications.

A long film containing a cellulose acylate and a compound A having a molecular weight of less than 1,000 which satisfies conditions 1-4. Condition 1: containing two or more aromatic rings each directly connected to a hydroxyl group in a molecule. Condition 2: containing one or more carbon atoms directly connected to an aromatic ring directly connected to a hydroxyl group and do not constitute the aromatic ring in a molecule, the carbon atoms being directly connected to 1 to 3 aromatic rings. Condition 3: Each carbon atom directly connected to an aromatic ring directly connected to a hydroxyl group and not constituting the aromatic ring has no bond with a hydrogen atom. Condition 4: Each carbon atom directly connected to an aromatic ring directly connected to a hydroxyl group and not constituting the aromatic ring is bonded by a single bond to atoms other than hydrogen atoms.

The present invention relates to a gas barrier film for a paper or paperboard based packaging material, said gas barrier film comprising: a microfibrillated cellulose layer (MFC layer), at least one surface of which has been grafted with a fatty acid halide; and a polymer layer disposed on the at least one surface of the MFC layer which has been grafted with a fatty acid halide. The present invention further relates to a paper or paperboard based packaging material, containers and carton blanks comprising the gas barrier film, and to a method for manufacturing the gas barrier film.