A process for manufacturing a porous body, includes preparing a dispersion liquid having a dispersion medium with cellulose-based nanofibers that have an average fiber diameter from 1 to 100 nm and dispersed therein, attaching the dispersion liquid to a porous support having a plurality of pores that connect with one another, removing the dispersion liquid attached to a surface of the porous support excluding an inside of pores of the porous support, and subsequently drying the porous support including the dispersion liquid in the pores of the porous support to remove the dispersion medium.

The present invention relates to a crosslinked unreinforced cellulose hydrate membrane crosslinked using at least two different crosslinking agents, to a method for the production thereof and to the use of the crosslinked unreinforced cellulose hydrate membrane according to the invention.

The present disclosure relates to a microporous hollow fiber filter membrane having a large inner diameter and a thin wall. The fiber can be used for sterile filtration of liquids or removal of particles from liquids. The disclosure further relates to a method for producing the membrane and a filter device comprising the membrane.

A porous membrane with a molecular weight cut-off (MWCO) greater than about 10 kDa, and a coating on at least a portion of a major surface of the porous membrane. The coating includes a star polymer having a hydrophobic core and hydrophilic arms, wherein the hydrophobic core contacts the porous membrane.

The present invention relates to a superhydrophilic biodegradable cross linked foam membrane and a process for preparation of said foam membrane from a seaweed polysaccharides by blending with amino biopolymers/amino acids/proteins/amino compounds followed by crosslinking with a naturally occurring cross linker, genipin. The foam membrane can be used as a substitute for synthetic membrane for varied applications including membrane separation for oil-water emulsions, oil-water mixtures and other aqueous-organic mixtures under ambient conditions. These foam membranes can be recycled and reused more than three times without considerable decrease in flux rate and stability. The separation methodology of the mixtures using the foam membrane of the present invention is gravity-driven and therefore, simple and energy-efficient.

The invention disclosed herein generally relates to matrices comprising polymers and methods for preparing them.

Described are hydrophilic polymers (including in the form of a filter membranes that includes hydrophilic polymer) having pendant ionic groups; to methods of making the hydrophilic polymer with pendant ionic groups and derivative membranes and filters; and to method of using the filter membranes for filtering a fluid such as a liquid chemical to remove unwanted material from the fluid.

The present invention provides a composite separation membrane having a separation layer formed of SPAE on the surface of a porous support membrane wherein the porous support membrane and a coat of SPAE are firmly adhered with each other so that separation property and water permeation property continue for a long period. The present invention is a composite separation membrane having a separation layer on the surface of a porous support membrane, characterized in that said porous support membrane contains 50% by mass or more of polyphenylene ether, and that said separation layer is formed of a sulfonated polyarylene ether copolymer constituted from a repeating structure of a specific hydrophobic segment and a specific hydrophilic segment. The composite separation membrane of the present invention is suitable as a liquid treating membrane such as a nanofiltration membrane and a reverse osmosis membrane.

The invention relates to a process for manufacturing a laminated material (S) comprising a fibrillated cellulose layer, characterized in that it comprises the following steps: (a) depositing a suspension (1) of fibrillated cellulose on a filtration membrane (2) and draining the suspension through that membrane so as to form a wet layer of fibrillated cellulose (A) having a dryness, that is to say a ratio between the mass of dry matter and the total mass of the fibrillated cellulose layer, of between 5% and 18%; (b) transferring the wet layer (A) under pressure to an at least partially hydrophilic surface of a substrate (B), so as to form the laminated material (S); (c) drying the laminated material. The invention also relates to a device for implementing the process.

A method for treating a surface of a microporous membrane includes: (1) contacting at least one surface of the membrane with a treatment composition including: (a) an acrylic polymer prepared from a mixture of vinyl monomers including: (i) a (meth)acrylic acid monomer and (ii) a silane-functional acrylic monomer; and (b) a base, where the acrylic polymer is in contact with the filler present in the matrix; and (2) subjecting the membrane of (1) to conditions sufficient to effect a condensation reaction between the filler and the acrylic polymer. A treated microporous membrane and an aqueous treatment composition are also disclosed.