Photocurable (meth)acrylate compositions for forming features on the surfaces of membranes, and particularly, on membranes used in osmosis and reverse-osmosis applications, such as membrane filters.

A method for manufacturing a membrane, which includes at least the following steps of: preparing a mixture that contains at least an aqueous solution of a cationic polymer whose pH is between 5 and 8, the cationic polymer having positively-charged groups in this aqueous solution, and an aqueous solution of an anionic polymer, the anionic polymer having negatively-charged groups in this aqueous solution; stirring the mixture; leaving the mixture to mature to cause the ionic interaction between positively-charged groups of the cationic polymer and negatively-charged groups of the anionic polymer, until obtaining within the mixture a membrane in the form of a hydrogel; adding at least one crosslinking agent so as to crosslink the membrane; drying the crosslinked membrane obtained upon completion of the previous step. This membrane is used for the treatment of liquid or gaseous effluents, as well as an antimicrobial support or for heterogeneous catalysis.

A substrate for a liquid filter, which includes a polyolefin microporous membrane, the polyolefin microporous membrane having a water permeation efficiency of 0.51 to 1.20 ml/min.Math.cm.sup.2, the polyolefin microporous membrane having a bubble point of 0.45 MPa or more and 0.70 MPa or less, the polyolefin microporous membrane having a compressibility of less than 15%.

A substrate for a liquid filter, which includes a polyolefin microporous membrane, the polyolefin microporous membrane having a water permeation efficiency of 1.21 to 2.90 ml/min.Math.cm.sup.2, the polyolefin microporous membrane having a bubble point of 0.40 MPa to 0.65 MPa, the polyolefin microporous membrane having a compressibility of less than 15%.

The present disclosure relates to a method of preparing ceramic filtration membranes with a low defect rate and improved filtration performances. The ceramic filtration membranes have a layered structure, wherein the layers are concerted to generate an improved filtration performance.

The present disclosure relates to a method of preparing oxide and non-oxide ceramic filtration elements with a high abrasion resistance, wherein the process of manufacture allows low sinter temperatures in the presence of atmospheric oxygen, wherein the obtained non-oxide filter membrane shows typical behavior of non-oxide ceramic filtration elements.

A filter device includes one or more filter membranes, and a filter housing enclosing the one or more filter membranes. Each of the filter membranes includes a base membrane made of a ceramic material, and a plurality of through holes. The base membrane is coated with a coating material.

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.

Embodiments of the present disclosure describe thin-film composite membranes comprising a crosslinked alginate layer on a surface of a porous woven or non-woven support. Embodiments of the present disclosure further describe methods of preparing membranes, methods of manufacturing membranes, methods of separating chemical species, methods of using the membranes for organic solvent nanofiltration, pervaporation, and the like.

Disclosed herein are vapour-phase crosslin ked composite membranes in the form of crosslinked polymers and defined inorganic materials. The membranes disclosed herein may have a narrow pore size distribution and precise molecule separation ability and may be used for organic solvent nanofiltration and organic solvent reverse osmosis. Also disclosed herein are methods of forming the membranes, and filtration. In a preferred embodiment, the vapour-phase crosslinked composite membrane is obtained by exposing a composite membrane comprising polyimide and UiO-66-NH.sub.2 particles to an amine vapour.