Abstract:
A gas separation membrane, methods of forming the membrane, and methods of using the membrane for gas separation are provided. An exemplary gas separation membrane includes a cellulosic matrix and a polymer of intrinsic microporosity (PIM). The PIM includes chains coupled by a heat-treating under vacuum.
Abstract:
Provided is a gas separation membrane 10 including a separation layer 1 which comprises a block copolymer having at least a first segment and a second segment, in which the separation layer 1 has a phase separation structure that has at least a first structure 11 derived from the first segment and a spherical second structure 12 derived from the second segment. The gas separation membrane in which the spherical second structure satisfies Formula 1, the first structure and the spherical second structure satisfy the following Formula 2, and the first structure 11 has a structure that is continuous in the thickness direction over the entire thickness of the separation layer 1 has high gas permeability and high gas separation selectivity. Also provided is a gas separation membrane module. R/L
Abstract:
A gas separation membrane has a gas separation layer containing a poly(benzoxazole-imide) compound in which the poly(benzoxazole-imide) compound having structural units represented by General formulae (I) and (II), or structural units represented by General formulae (I), (II) and (III) satisfies a specific molar quantity condition. In the formulae, X and Y each represent a single bond or a specific divalent linking group; L represents a specific divalent linking group including a phenylene group; and R represents a specific group. A gas separation module and a gas separation method use the gas separation membrane. A gas separation apparatus includes the gas separation module.
Abstract:
A method for the manufacture of a polymer is provided, the method comprising: Providing a first monomer, the first monomer comprising a bicyclic diamine moiety, a first nucleophilic group provided on a carbon atom of an aromatic moiety, and a second nucleophilic group provided on a carbon atom of an aromatic moiety; Providing a bridging compound comprising at least two sites vulnerable to nucleophilic attack; and Contacting the first monomer with the bridging compound. Polymers made by said method and uses of such polymers are also disclosed.
Abstract:
Improved integrally skinned asymmetric membranes for organic solvent nanofiltration, and their methods of preparation and use are disclosed. Membranes are formed from polybenzimidazoles by phase inversion and are then crosslinked by addition of crosslinking agents. These stabilise the membranes and allow solvent nanofiltration to be maintained even in the solvents from which the membranes were formed by phase inversion, and in strongly acidic and strongly basic solvents.
Abstract:
Described is a method for producing covalently and/or ionically cross-linked blend membranes from a halomethylated polymer, a polymer comprising tertiary N-basic groups, preferably polybenzimidazole, and, optionally, a polymer comprising cation exchanger groups such as sulfonic acid groups or phosphonic acid groups. The membranes can be tailor-made in respect of the properties thereof and are suitable, for example, for use as cation exchanger membranes or anion exchanger membranes in low-temperature fuel cells or low-temperature electrolysis or in redox flow batteries, or—when doped with proton conductors such as phosphoric acid or phosphonic acid—for use in medium-temperature fuel cells or medium-temperature electrolysis.
Abstract:
Disclosed are membranes formed from self-assembling diblock copolymers of the formula (I): wherein R1-R4, n, and m are as described herein, which find use in preparing porous membranes. Embodiments of the membranes contain the diblock copolymer self-assembled into a cylindrical morphology. Also disclosed is a method of preparing such membrane which involves spray coating a polymer solution containing the diblock copolymer to obtain a thin film, followed by annealing the thin film in a solvent vapor and/or soaking in a solvent or mixture of solvents to form a nanoporous membrane.
Abstract:
Disclosed are polybenzimidazoles containing sulfonyl groups. The polymers can be synthesized in Eaton's reagent from 3,3′,4,4′-tetraaminodiphenylsulfone, which itself can be synthesized from 4,4′-dichlorodiphenylsulfone. Methods of synthesizing the polymers are disclosed. The disclosed polymers can be used for high temperature H2/CO2 separation membranes and other uses.
Abstract:
A water treatment system comprises at least one electrolytic cell comprising at least one electrode and a power source for powering the electrode. The electrode may be a metal electrode comprising a coating of polymer comprising structural units of formula I (I) wherein R1 is independently at each occurrence a C1-C6 alkyl radical or —SO3M wherein M is independently at each occurrence a hydrogen or an alkali metal a hydrogen or an alkali metal, R2 is independently at each occurrence a C1-C6 alkyl radical, a is independently at each occurrence an integer ranging from 0 to 4, and b is independently at each occurrence an integer ranging from 0 to 3. An associated method is also described.
Abstract:
Disclosed are self-assembled structures prepared from block copolymers, for example, diblock copolymers of the formula (I): wherein R1-R4, n, and m are as described herein, which find use in preparing nanoporous membranes. In an embodiment, the block copolymer self-assembles into a cylindrical morphology. Also disclosed is a method of preparing such self-assembled structures which involves spin coating a polymer solution containing the block copolymer to obtain a thin film, followed by solvent annealing of the film. Further disclosed is a method of preparing porous membranes from the self-assembled structures.