A method of separating gas and a method of making a gas separation membrane. The method of separating gas includes flowing a gas stream through a membrane, in which the membrane comprises a crosslinked mixture of a poly(ether-b-amide) copolymer and an acrylate-terminated poly(ethylene glycol) according to formula (I) or formula (II); and separating the gas stream via the membrane.

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In formulas (I) and (II), each n is of from 2 to 30; and each R is independently H or CH.sub.3.

Described are various embodiments of a method for fabricating a polymer membrane having open through holes, and membranes so produced. In some embodiments, a curable polymeric resin is introduced within a micro post structure wherein a material of the micro posts is soluble in a solvent and wherein the curable polymeric resin is insoluble in this solvent such that the structure can be at least partially dissolved to release the membrane once cured.

A sterilization filter includes a synthetic polymer film, the synthetic polymer film having a surface which has a plurality of first raised portions, a two-dimensional size of the plurality of first raised portions being more than 20 nm and less than 500 ?m when viewed in a normal direction. The synthetic polymer film is arranged in a predetermined shape. In the arrangement of the predetermined shape, an inclination of a normal to the surface varies depending on a position over the surface, and an inclination of a normal to a surface opposite to the surface varies depending on a position over the opposite surface. At least part of the surface is capable of coming into contact with a gas or liquid.

A method for preparing a ceramic fiber filter tube with high air permeability, including: using mullite short fibers as aggregates, adding glass fibers and silica sol as sintering aids, obtaining a ceramic fiber filter tube green body by using a filterer-pressing forming process, and obtaining the ceramic fiber filter tube with high air permeability by freeze-drying and heat treatment in turn. The combination of two sintering aids with different properties can effectively improve the performance of ceramic fiber filter tube prepared by a wet forming technology. At the same time, the freeze-drying treatment can block the migration path of nanoparticles in the silica sol to the surface of the ceramic fiber filter tube due to the capillary force, so that the properties of the prepared ceramic fiber filter tube are more uniform, providing a reference for the preparation of a ceramic fiber membrane with high flux.

The present invention relates to a method for one-step regulation of a pore structure and surface properties of a silicon carbide (SiC) membrane. The method comprises: first, fully mixing SiC powder with a sintering aid, and then synergistically regulating a pore structure and surface wetting properties of a SiC membrane by controlling a molding pressure and a sintering condition. The amount of SiO.sub.2 generated by oxidation of SiC is controlled, and in situ reaction of SiO.sub.2 and the sintering aid is prompted to generate a neck connection, such that a sintering temperature of the SiC membrane can be reduced, and the strength and corrosion resistance properties of the SiC membrane can also be improved. The degree of sintering of the SiC membrane is effectively controlled by means of the regulation of the molding pressure and the sintering temperature. It is a simple method for one-step regulation of a pore structure and surface properties of a SiC membrane. The SiC membrane prepared has porosity adjustable in a range of 13% to 48% and a pore size adjustable in a range of 0.17 m to 1 m; and the SiC membrane has an initial dynamic water contact angle in a range of 12.01 to 66.8 and an underwater oil contact angle adjustable in a range of 120.3 to 155.1. The SiC membrane prepared has high bending strength and pure water permeation properties and show a broad application prospect in the field of oil-water separation and emulsion preparation.

A method for preparing a ceramic fiber filter tube with high air permeability, including: using mullite short fibers as aggregates, adding glass fibers and silica sol as sintering aids, obtaining a ceramic fiber filter tube green body by using a filterer-pressing forming process, and obtaining the ceramic fiber filter tube with high air permeability by freeze-drying and heat treatment in turn. The combination of two sintering aids with different properties can effectively improve the performance of ceramic fiber filter tube prepared by a wet forming technology. At the same time, the freeze-drying treatment can block the migration path of nanoparticles in the silica sol to the surface of the ceramic fiber filter tube due to the capillary force, so that the properties of the prepared ceramic fiber filter tube are more uniform, providing a reference for the preparation of a ceramic fiber membrane with high flux.

The present disclosure relates to a membrane having uniform pore size and pore arrangement. The present disclosure provides a membrane including a plurality of pores, wherein the diameter of the plurality of pores is 100 m or less, the porosity is 20 to 80%, the thickness is 3 to 500 m, and the membrane is a single layer membrane.