Embodiments include nanofilms comprising the reaction product of a natural building block type A including at least two functional groups and a natural building block type B including at least three functional groups, wherein the natural building block type A and the natural building block type B react to form a branched polymer network including solvent-resistant bonds.

Provided is a method for removing CO.sub.2 comprising: supplying a gas to be processed containing CO.sub.2, N.sub.2 and O.sub.2 to a feed side of a CO.sub.2/O.sub.2 selective permeation membrane within a temperature range of 15° C. to 50° C.; generating water vapor and supplying the water vapor to the CO.sub.2/O.sub.2 selective permeation membrane; selectively removing CO.sub.2 from the gas to be processed by permeating CO.sub.2 in the gas to be processed from the feed side to a permeate side of the CO.sub.2 selective permeation membrane selectively to O.sub.2 and N.sub.2 in the gas to be processed; and using a CO.sub.2 facilitated transport membrane having CO.sub.2/O.sub.2 selectivity and CO.sub.2/N.sub.2 selectivity within the temperature range as the CO.sub.2 selective permeation membrane, the CO.sub.2 facilitated transport membrane being configured with a hydrophilic polymer containing an amino acid and a deprotonating agent for preventing protonation of an amino group of the amino acid supported by a porous membrane, wherein a CO.sub.2 concentration in the gas to be processed is 3 mol % or less on a dry basis.

Provided is a method for removing CO.sub.2 comprising: supplying a gas to be processed containing CO.sub.2, N.sub.2 and O.sub.2 to a feed side of a CO.sub.2/O.sub.2 selective permeation membrane within a temperature range of 15° C. to 50° C.; generating water vapor and supplying the water vapor to the CO.sub.2/O.sub.2 selective permeation membrane; selectively removing CO.sub.2 from the gas to be processed by permeating CO.sub.2 in the gas to be processed from the feed side to a permeate side of the CO.sub.2 selective permeation membrane selectively to O.sub.2 and N.sub.2 in the gas to be processed; and using a CO.sub.2 facilitated transport membrane having CO.sub.2/O.sub.2 selectivity and CO.sub.2/N.sub.2 selectivity within the temperature range as the CO.sub.2 selective permeation membrane, the CO.sub.2 facilitated transport membrane being configured with a hydrophilic polymer containing an amino acid and a deprotonating agent for preventing protonation of an amino group of the amino acid supported by a porous membrane, wherein a CO.sub.2 concentration in the gas to be processed is 3 mol % or less on a dry basis.

A process for preparing a hollow fiber includes the steps of providing a dope solution including polyamide imide (PAI), providing an aqueous bore solution including polyethylene imine (PEI), extruding the dope solution in an cross-sectional annular shape and ejecting the bore solution in the center of the annular shape, allowing the PAI and the PEI to react, thereby forming an internal surface layer including the cross-linked reaction product, and forming a polyamide Thin Film Composite (TFC) layer by interfacial reaction of aqueous di- or triamine compound and organic di- or triacylhalide compound on the internal surface layer including the cross-linked reaction product.

A process for preparing a hollow fiber includes the steps of providing a dope solution including polyamide imide (PAI), providing an aqueous bore solution including polyethylene imine (PEI), extruding the dope solution in an cross-sectional annular shape and ejecting the bore solution in the center of the annular shape, allowing the PAI and the PEI to react, thereby forming an internal surface layer including the cross-linked reaction product, and forming a polyamide Thin Film Composite (TFC) layer by interfacial reaction of aqueous di- or triamine compound and organic di- or triacylhalide compound on the internal surface layer including the cross-linked reaction product.

There is provided a carbon capture mixed matrix membrane comprising: a polymeric support layer; and a carbon dioxide capture layer in contact with the polymeric support layer, the carbon dioxide capture layer comprising solid porous material with at least one carbon dioxide adsorption site, wherein the polymeric support layer comprises spatially ordered uniform sized pores. The polymeric support layer may be patterned by micro-molding, nanoimprinting, mold-based lithography or other suitable lithographic process. The carbon dioxide capture layer may comprise amine-functionalised material, metal-organic frameworks such as zeolite imidazolate framework 8 (ZIF-8) or copper benzene-1,3,5-tricarboxylate (Cu-BTC) which may or may not be amine modified. There is also provided a membrane module comprising at least one carbon capture mixed matrix membrane and a method of forming the carbon capture mixed matrix membrane.

A composite membrane including carbide-derived carbon (CDC) particles deposited onto a surface of an intermediate layer which is supported on a porous polysulfone substrate. The intermediate layer contains reacted units of a polyfunctional acyl halide (e.g. trimesoyl chloride) and polydopamine. Methods of making the composite membrane via techniques such as filtration-assisted deposition of CDC particles and interfacial polymerization are specified. Water flux and oil rejection (e.g. diesel) performances of the composite membrane are evaluated. A method of separating an organic compound, such as hydrocarbons, from an aqueous sample utilizing the membrane is also provided.

A composite membrane including carbide-derived carbon (CDC) particles deposited onto a surface of an intermediate layer which is supported on a porous polysulfone substrate. The intermediate layer contains reacted units of a polyfunctional acyl halide (e.g. trimesoyl chloride) and polydopamine. Methods of making the composite membrane via techniques such as filtration-assisted deposition of CDC particles and interfacial polymerization are specified. Water flux and oil rejection (e.g. diesel) performances of the composite membrane are evaluated. A method of separating an organic compound, such as hydrocarbons, from an aqueous sample utilizing the membrane is also provided.

The present invention relates generally to methods of generating a biomimetic cell wall (BCW) on a target surface, compositions comprising the BCW, and methods of use of the compositions, including biomedical applications of the BCW coated compositions.

A preparation method of separation membrane is provided. First, a polyimide composition including a dissolvable polyimide, a crosslinking agent and a solvent is provided. The dissolvable polyimide is represented by formula 1: ##STR00001## wherein B is a tetravalent organic group derived from a tetracarboxylic dianhydride containing aromatic group, A is a divalent organic group derived from a diamine containing aromatic group, A′ is a divalent organic group derived from a diamine containing aromatic group and carboxylic acid group, and 0.1≤X≤0.9. The crosslinking agent is an aziridine crosslinking agent, an isocyanate crosslinking agent, an epoxy crosslinking agent, a diamine crosslinking agent, or a triamine crosslinking agent. A crosslinking process is performed on the polyimide composition. The polyimide composition which has been subjected to the crosslinking process is coated on a substrate to form a polyimide membrane. A wet phase inversion process is performed on the polyimide membrane.