9 results about "Barrer" patented technology

This invention discloses a two-dimensional MUF-16 nanosheet, a hybrid matrix membrane, its preparation method, and its application in separation. The two-dimensional MUF-16 nanosheet has a lateral dimension of 500-900 nm and a thickness of 100-300 nm, possessing a 0.76 nm one-dimensional microporous network, with 2-3 nm textured mesopores derived from lamellar misalignment. Addressing the problem of intra-membrane aggregation and interface defects caused by the large crystal size of conventional MUF-16, this invention introduces a monocarboxylic acid modifier as a morphology modifier, combined with a cobalt metal source, to precisely block the growth of specific crystal faces through steric hindrance, successfully preparing the two-dimensional MUF-16 nanosheet. Furthermore, it is dispersed as a filler in a Pebax-2533 polymer matrix, and a high-performance hybrid matrix membrane is constructed through spin-coating. Its CO2 permeability coefficient reaches 511.47 Barrer, and its CO2 / N2 separation factor reaches 37.82. This hybrid matrix membrane exhibits excellent resistance to plasticization and long-term service stability, and has broad commercial application prospects in fields such as industrial flue gas decarbonization, natural gas purification, and biogas upgrading.

The present invention relates to the field of gas separation membranes, and relates to a dual-crosslinked helium separation membrane, and a preparation method therefor and a use thereof. The present invention provides an innovative research idea and preparation method, comprising the following experimental steps: (1) molecular design and synthesis of a diamine monomer containing alkynyl and a ligand; (2) synthesis of a crosslinkable TB polymer and preparation of a separation membrane; and (3) construction of a dual-network helium separation membrane by means of a "covalent bonding-metal coordination" step-growth crosslinking strategy. The present invention prepares a membrane material integrating good permeability, relatively high selectivity and excellent anti-aging performance. The permeability coefficient of He is larger than or equal to 50 Barrer, the selection coefficient of He / N2 and He / CH4 is larger than or equal to 150, the permeability coefficient of gas is improved, and high selectivity is kept, an anti-trade-off effect is achieved, and in a 50-day aging data test, the helium flux of the covalent bonding-metal coordination dual-crosslinked separation membrane is only reduced by 3.5%, and has good stability.

The invention belongs to the technical field of hybrid membrane preparation and gas separation, and particularly relates to CoNi-MOF powder, a CoNi-MOF-based hybrid membrane and a preparation method and application of the CoNi-MOF-based hybrid membrane. The alkyl chain is successfully introduced into the MOFs to construct the confinement nano channel. By utilizing the steric hindrance effect of an alkyl chain, the gradient regulation and control of the aperture is realized. The optimized hybrid membrane prepared by doping the CoNi-epoz into the PIM-1 / 6FDA-DAM blended polymer matrix shows excellent O2 / N2 separation performance, the O2 permeability is 275.5 Barrer, and the O2 / N2 selectivity is 7.2. Meanwhile, the membrane module prepared based on the CoNi-epoz hybrid membrane provides the O2 permeation rate of 47.5 GPU and the O2 / N2 selectivity of 5.1 under the feeding pressure of 1-3 bar, and the practical industrial application potential is shown.

The application belongs to the field of chemistry and chemical engineering, and discloses a polyimide film material with a side group benzene ring and a high substitution grafted imidazole group and a preparation method thereof.The key of the preparation method of the polyimide film material is that the aromatic diamine monomer for synthesizing a polyimide main chain contains a side group benzene ring structure, and the side group benzene ring structure has at least one electron-donating group.The electron cloud density of the benzene ring structure is improved through the electron-donating group, the difficulty of a secondary chloromethylation reaction is reduced, and the side group benzene ring is high-substitution grafted with the imidazole group.Based on the technical scheme of the application, a kind of polyimide film material is synthesized, the main chain of which is synthesized from 4,4'-(hexafluoroisopropylene) diphthalic anhydride and bis(4-amin-3,5-dimethylphenyl) toluene methane, and the carbon dioxide permeation coefficient reaches 59.3 Barrer at normal temperature, the selectivity reaches 118.6, and the polyimide film material exhibits excellent natural gas decarburization performance.

Photobioreactor devices and units for the production of biomass and remediation of environmental pollution are provided. The bioreactor devices include: (i) a photobioreactor unit comprising a first membrane layer and a second membrane layer, the two membrane layers being arranged such that at least a portion of the first membrane layer is directly bonded to at least a portion of the second membrane layer to form a defined boundary around the non-bonded portions of the first and second membrane layers, thereby defining the photobioreactor unit capable of containing a fluid, wherein at least one of the first and second layers is translucent, and wherein at least a portion of the first and second membrane layers is permeable to gas. The permeability coefficient of oxygen through the first and / or second membrane layers is suitably not less than about 100 Barrer, typically not less than about 300 Barrer, and suitably not less than about 500 Barrer. The photobioreactor unit further includes inlet and outlet ports for enabling circulation of the fluid through the unit. Systems including the devices and methods of using the devices to produce biomass, remediate wastewater, and remove atmospheric pollutants are provided.

The invention provides a novel silicone hydrogel contact lens and a preparation method thereof. The novel silicone hydrogel contact lens is prepared from the following raw materials in parts by weight: 5-30 parts of fluorine-containing siloxane monomer, 3-15 parts of polyether modified siloxane oligomer, 40-80 parts of composite hydrophilic monomer, a functional cross-linking agent, a photoinitiator, an anti-deposition agent and a natural moisturizing factor. The preparation method comprises the following steps: mixing and filtering the raw materials, performing ultraviolet prepolymerization and thermal polymerization, removing unreacted monomers through supercritical CO2 extraction, and performing post-treatment sterilization. Deposition resistance and oxygen permeability are improved through fluorine-containing siloxane, compatibility is optimized through polyether modified oligomer, wearing comfort is enhanced through an anti-deposition agent and a natural moisturizing factor, the oxygen permeability coefficient reaches 140-180 barrs, the protein adsorption quantity is reduced, the continuous wearing comfort is prolonged, and the contact lens is suitable for the field of high-performance contact lenses.

The application discloses a kind of porous ammonia hydrogen separation membranes and preparation method thereof, comprising the following steps: S1, with chloromethylated polyether sulfone as raw material, it is dissolved in organic solvent, and casting membrane solution is obtained;S2, casting membrane solution is evenly coated on clean glass plate, and porous CMPES base film is obtained;S3, CMPES base film is soaked in polyamine solution and crosslinked, then it is modified by quaternary ammonium with halogenated alkane, and modified membrane is obtained;S4, modified membrane is soaked in metal chloride solution and chelation reaction is carried out to introduce adsorption site, then the membrane is taken out and repeatedly cleaned with deionized water, and porous ammonia hydrogen separation membrane is obtained.The separation membrane obtained by the application has high-efficiency ammonia separation effect, and when separating ammonia-containing gas, ammonia permeability is as high as 7777 Barrer, and ammonia / hydrogen selectivity is as high as 706.

The invention discloses a preparation method and application of a high-permeability gas separation membrane based on a fluorenyl-naphthyl acetylene copolymer, and belongs to the field of membrane separation. According to the method disclosed by the invention, 1-phenyl-2-(7-trimethylsilyl-9, 9-dimethyl-fluorene-2-yl) acetylene and 1-beta-naphthyl-2-(4-trimethylsilyl) phenylacetylene are subjected to copolymerization reaction according to different molar ratios to prepare a series of fluorenyl-naphthyl acetylene copolymers, and the corresponding gas separation membrane is prepared by a solvent evaporation method. And carrying out desilylation treatment to obtain the membrane derivative. The prepared membrane material has ultrahigh gas permeability, the oxygen permeability of DCopoly (Fluu-Naph) (1: 1) can reach 17000 Barrer, and the membrane material has excellent thermal stability and physical aging resistance and has important application prospects in the gas separation fields of oxygen enrichment, carbon capture and the like.

The invention discloses a zinc halide modified carbon nanotube composite polyimide film and a preparation method and application thereof, and relates to the technical field of film materials, the zinc halide modified carbon nanotube composite polyimide film comprises a zinc halide modified carbon nanotube and polyimide, the zinc halide in the zinc halide modified carbon nanotube accounts for 10-40% of the mass of the carbon nanotube, and the polyimide accounts for 10-40% of the mass of the carbon nanotube. The zinc halide modified carbon nanotube accounts for 10-30% of the mass of the polyimide, the zinc halide is one of ZnCl2, ZnBr2 and ZnI2, and the polyimide is one of P84 and Matrimid 5218. According to the prepared zinc halide modified carbon nanotube composite polyimide film, after the zinc halide modified carbon nanotube is introduced, the film selectivity and flux are remarkably improved, the film flux is improved to the maximum 1537 Barrer from 52 Barrer, the film selectivity is improved again after the zinc halide modified film is adopted, and the He / CH4 selectivity is improved to the maximum 286 from the original 97.