31 results about "Pervaporation" patented technology

The invention discloses a pervaporation-membrane distillation coupling separation method for advanced urine water reuse, and belongs to the technical field of water treatment. The method comprises the following steps: soaking a microporous hydrophobic membrane in a strong alkali solution, and treating at 60-80 DEG C for 4-6 hours; preparing a gel precursor solution through a gel monomer and a cross-linking agent, and coating the gel precursor solution on the surface of one side of the hydrophobic microporous membrane; stabilizing the human urine; the coupling separation membrane with the pervaporation functional layer and the hydrophobic substrate is placed in a membrane pool with the effective working area of 10 cm < 2 >; urine and pure water circulate on the two sides of the separation membrane respectively; one side of a urine feeding liquid is heated to 60 DEG C by using a water bath kettle, and 300-500ml of pure water is used as a condensate; after the urine is treated until about 90% of water is recycled, the feed liquid is replaced with pure water to wash the separation membrane. According to the invention, the problems of low water recovery rate and low reuse water quality in the urine treatment process of the traditional distillation membrane are solved, the reuse rate of urine water is greatly improved, the separation membrane is not wetted, and the conductivity of discharged water is greatly reduced.

The invention discloses continuous production equipment and process for grape spirit, and relates to the technical field of grape wine. The production equipment comprises a nanofiltration treatment unit, a continuous pervaporation separation treatment unit and a desulfurization unit. The nanofiltration treatment unit comprises a nanofiltration membrane group and a valve I, and the nanofiltration membrane group is used for separating wine raw materials to obtain nanofiltration permeate. The valve I is used for controlling the circulating filtration process of the nanofiltration treatment unit. The continuous pervaporation separation treatment unit comprises a condensation section and a plurality of treatment sections. The treatment section comprises a pervaporation separation membrane group, and the pervaporation separation membrane group is used for carrying out separation treatment on the nanofiltration permeate liquid to obtain permeate gas. The permeation sides of the plurality of treatment sections converge to the condensation section and are used for condensing the permeation gas to obtain condensate. The desulfurization unit comprises a desulfurization tower and is used for carrying out desulfurization treatment on the condensate. Compared with the prior art, the continuous production equipment and process for the grape spirit can improve the production efficiency and quality.

The application belongs to the technical field of novel separation membrane materials, and discloses an ionic covalent organic framework membrane as well as a preparation method and application thereof. An amine monomer and an aldehyde monomer are respectively dissolved in water and an organic solvent, and a continuous defect-free ionic covalent organic framework membrane is formed in situ on the surface of a carboxylated porous support base membrane through a limited interface polymerization method. The membrane structure and separation performance can be optimized by adjusting the monomer concentration and reaction time. The preparation process is simple and controllable, the prepared membrane is applied to pervaporation butanol-water separation, and high permeability and high selectivity are exhibited, and the prepared membrane also has good long-term operation stability. In addition, the prepared membrane can also be applied to other kinds of alcohol-water separation and pervaporation salt-water separation, and has good universal application.

The application provides a composite pervaporation desalination membrane and a preparation method and application thereof. The composite pervaporation desalination membrane comprises a separation layer with a separation function and an organic porous base membrane layer serving as a support; the raw materials of the separation layer comprise a polyvinyl alcohol aqueous solution, a PFSA-g-GO nanocomposite and a crosslinking agent, the addition amount of the PFSA-g-GO nanocomposite is 0.2-4.5 mass%, the addition amount of the crosslinking agent is 1-10 mass%, and the mass% is the percentage of the mass of each component to the mass of the polyvinyl alcohol; and the organic porous base membrane layer is a polyacrylonitrile membrane or a polyethersulfone membrane. The preparation method is simple and easy to implement, and has low cost, and can simultaneously improve the water flux and desalination rate of the composite pervaporation desalination membrane.

The invention discloses a method for preparing a molecular sieve membrane from a super-dilute reaction solution, and belongs to the technical field of inorganic membrane materials and membrane separation. The method comprises the following steps: preparing a mixed solution of an aluminum source and a silicon source through an inorganic alkali system, aging to obtain a first reaction solution, and performing hydro-thermal synthesis to obtain a high-activity nano FAU seed crystal; uniformly loading seed crystals on the surface of the porous support body to form a compact seed crystal layer; a super-dilute second reaction solution is further used for short-time hydrothermal growth, and controllable construction of the FAU molecular sieve membrane is achieved. According to the method, the ultrathin FAU film with crystal alternation and compact structure can be obtained, film defects are remarkably reduced, and an organic template agent and high-temperature calcination treatment are not needed. The obtained membrane shows excellent performance in pervaporation dehydration, the total flux can reach 6.3 kg / (m.h), the separation factor is as high as 1413, and the membrane is far superior to an FAU membrane prepared from a traditional micron seed crystal and a high-concentration solution system, and can be widely applied to the fields of organic solvent dehydration, green solvent purification, gas separation, membrane reactors and the like.

This invention discloses a method for preparing an internally pressurized MOF-based hollow fiber composite membrane module, belonging to the field of membrane separation technology. The invention involves introducing an aqueous solution containing metal ions and an organic solution containing organic ligands into the shell side and tube side of a hollow fiber membrane module, respectively. By controlling the number of reactions between metal ions and organic ligands on the inner surface of the hollow fiber membrane, a continuous MOF functional layer is precisely constructed. Subsequently, a low-concentration polymer solution is used to repair defects in the MOF layer, resulting in an internally pressurized MOF-based hollow fiber composite membrane module, which is then applied to pervaporation ethanol / water separation. This method simplifies the preparation process of the internally pressurized hollow fiber composite membrane module; the thin inner surface MOF layer reduces molecular diffusion resistance and enhances molecular mass transfer; the surface-coated polymer matrix effectively repairs MOF layer defects, further enhancing molecular separation selectivity and effectively protecting the MOF functional layer; and it enhances the long-term stability of the membrane module.

Described herein is a preparation method of C-ZIF-67-derived nano-porous carbon doped PDMS mixed matrix membrane based on a tubular ceramic carrier and its application in pervaporation of low-concentration ethanol aqueous solution to recover ethanol by synthesizing ZIF-67 crystals and carbonizing the ZIF-67 crystal to obtain C-ZIF-67 filler particles. According to the present application, the nano-porous carbon particles derived from ZIF-67 are prepared by a high-temperature calcination method, and are fully carbonized at a certain calcination temperature, so that the disappearance of characteristic groups after carbonization can reduce the influence of surface electrical properties, and the particle size is reduced. At the same time, the MOF skeleton structure is still retained after carbonization, the pore size is enlarged, and the carbon material also has strong hydrophobicity.

The application discloses a kind of zwitterionic covalent organic framework membranes and preparation method and application thereof, belong to the technical field of separation membrane material, continuous covalent organic framework membrane is in-situ constructed on the surface of porous support base film by interfacial polymerization reaction, then the membrane is sequentially soaked in organic phase solution containing polyacyl chloride and aqueous solution containing zwitterion, and zwitterionic covalent organic framework membrane is obtained after heat treatment.The continuous covalent organic framework membrane hole channel is through, can be used as the rapid transfer channel of molecule, it is favorable to obtain high permeation flux;Zwitterionic is carried out on its surface, on the one hand, the hydrophilicity of membrane surface can be improved, on the other hand, the pore structure of membrane surface can be controlled, while forming water selective transport channel, competitive alcohol molecules are excluded.The preparation method of the application is simple and controllable, and the prepared composite membrane is used in pervaporation ethanol dehydration process, and excellent separation performance and long-term operation stability are shown.

This invention relates to the field of environmental protection equipment, specifically to a pressure regulation device based on a dialysis-denitrification process. The device includes a pressure-regulating unit, which comprises a housing and a pressure-regulating rotating component. The housing has a chamber in which the pressure-regulating rotating component is rotatably disposed. The rotating component has an annular liquid passage, which includes a pressure-stabilizing section, a pressure-increasing section, and a pressure-relieving section. All three sections are arc-shaped, with the width of the pressure-relieving section greater than that of the pressure-stabilizing section, which is also greater than that of the pressure-increasing section. The center of the annulus coincides with the rotation center of the rotating component. One side of the housing has an inlet for connection to a pervaporation assembly, and the other side has an outlet, located on opposite sides of the liquid passage. The pressure-regulating rotating component at the pressure-increasing section has a larger blocking area than at the pressure-stabilizing section, which is also larger than that at the pressure-relieving section, for the inlet. This invention allows for micro-pressurization of the pervaporation assembly without the introduction of a pump, while minimizing the impact on the pressure of the dialysis assembly.

The application belongs to the technical field of chemistry and chemical industry, and particularly relates to a method for regenerating and utilizing waste stripping liquid of photoresist. The waste stripping liquid of photoresist is regenerated and utilized by the following steps: realizing waste liquid demulsification, viscosity reduction and impurity removal through specific modified magnetic nanoparticles, then carrying out pervaporation dehydration through a zeolite membrane covered with a zirconium-tannic acid-polyethyleneimine metal organic coordination network layer, and finally carrying out adsorption polishing and recombination, so that the waste stripping liquid of photoresist is regenerated and utilized, the water removal rate of the waste liquid is greater than 99.9%, and the recovery rate of effective components in the waste liquid is greater than 99.5%.

The invention provides a method for separating trace organic matters in water based on non-isothermal pervaporation, which comprises the following steps: additionally arranging a conductive porous support membrane (carbon nanotube membrane) on one side of pervaporation separation membrane penetrating fluid, and electrically heating the support membrane part; the temperature of the penetrating fluid side of the pervaporation separation membrane is higher than that of the raw material liquid side of the pervaporation separation membrane, so that the micro-temperature gradient of the pervaporation separation membrane is formed. According to the method, the temperature trade-off effect influencing flux and separation factors is eliminated in a mode of actively creating temperature gradient (non-isothermal) in a microenvironment, high selectivity and good treatment capacity can be achieved at the same time, and the method has a remarkable effect on improvement of pervaporation performance.

The invention discloses a c-PEI-ZIF-8 mixed matrix membrane based on a reverse filling method and a preparation method and application thereof.According to the c-PEI-ZIF-8 mixed matrix membrane based on the reverse filling method, a ZIF-8 layer is constructed on a PAN base membrane firstly through the reverse filling method, then gaps are accurately filled with a PEI solution, finally, trimesoyl chloride (TMC) is used for conducting surface crosslinking on the PEI-ZIF-8 mixed matrix membrane, drying is conducted, and the c-PEI-ZIF-8 mixed matrix membrane is obtained. And the c-PEI-ZIF-8 mixed matrix membrane is obtained. The c-PEI-ZIF-8 mixed matrix membrane prepared by the invention is compact and defect-free, can simultaneously show high separation selectivity and high permeation flux during MeOH / DMC pervaporation separation, also has structural stability, and can ensure the separation performance temperature; in addition, the method is simple in technological process and mild in operation condition, and has good repeatability and large-scale production potential.

The application discloses a perovskite / high polymer pervaporation composite membrane and a preparation method thereof. The perovskite / high polymer pervaporation composite membrane is prepared by taking silica sol with a certain particle size as a precursor to prepare perovskite, then mixing the dispersed perovskite with a high polymer solution and a crosslinking agent, and coating the mixture to obtain the perovskite / high polymer pervaporation composite membrane. The perovskite contained in the pervaporation composite membrane is a highly hydrophilic material, has the property of preferentially adsorbing water, and the porous perovskite is highly dispersed in the matrix and has the property of promoting the diffusion of water molecules. The surface of the membrane and the membrane can also form special channels for water molecule transmission through the "through" effect of the perovskite, so that the permeation flux and selectivity of the pervaporation composite membrane to the separated components can be simultaneously increased.

The application discloses a kind of green preparation methods of hydrophilic ZSM-5 zeolite membrane and its application, belong to inorganic membrane separation technical field.The application includes the following steps: S1, precoat ZSM-5 seed on the surface of porous carrier;S2, silicon source, aluminum source, alkali source, deionized water and isopropyl alcohol are mixed, and stirring is obtained even organic ammonium template-free synthesis liquid;S3, the porous carrier of precoat seed is placed in the synthesis liquid, and hydrothermal crystallization reaction is carried out;S4, after reaction, membrane body is taken out, and washed to neutral with deionized water, after drying, calcination treatment, obtain hydrophilic ZSM-5 zeolite membrane.The application avoids the high cost and environmental pollution problem caused by organic ammonium template from root, and the prepared zeolite membrane shows excellent separation performance in pervaporation dehydration of ethanol, isopropyl alcohol, acetone and other various organic solvent-water systems, and has good industrial application prospect.

This invention discloses a method for the continuous preparation of molecular sieve membranes with zero chemical emissions, as well as the resulting molecular sieve membranes and their applications, belonging to the field of molecular sieve membrane preparation and membrane separation technology. The method first constructs a molecular sieve seed layer on the outer or inner surface of a porous support. Then, the support is loaded into a membrane synthesis assembly with a first and a second flow channel isolated from each other. A first precursor phase containing a silicon source and no organic structure-directing agent, and a second precursor phase containing an aluminum source, an organic structure-directing agent, and an alkali source flow continuously on opposite sides of the support. By controlling the pressure on both sides, the two phases are controlled to mix and crystallize at the seed layer interface, thereby continuously forming a molecular sieve membrane. The two precursor phases that do not participate in the membrane-forming reaction are recycled after flowing out, achieving closed-loop utilization of all components of the precursor materials and zero discharge of synthetic waste liquid. This method can be used for the continuous and efficient preparation of molecular sieve membranes with various topologies. The resulting membranes are suitable for gas separation, liquid separation, pervaporation, organic matter dehydration, ammonia separation, and catalytic membrane reactions.

The application discloses a pervaporation composite membrane and a preparation method and application thereof, and belongs to the technical field of membrane separation. The pervaporation composite membrane comprises a porous substrate, an intermediate film layer and a separation film layer which are arranged in sequence. The average pore diameter of the porous substrate is greater than or equal to 250 nm. The average pore diameter and porosity of the intermediate film layer are both smaller than the average pore diameter and porosity of the porous substrate, and the intermediate film layer has an organic affinity characteristic. The separation film layer has a hydrophobic characteristic and an organic selective permeation characteristic. The intermediate film layer is beneficial to improving the problems of pore penetration in a solid-liquid interface preparation process, is not prone to spreading, and the thickness of the separation film layer is uncontrollable, and can ensure the defect-free preparation of the separation film layer, and is beneficial to improving the permeability of the pervaporation composite membrane to organic matters.

The invention provides a molecular sieve membrane based on a nutrient-rich solution as well as a preparation method and application of the molecular sieve membrane, and belongs to the technical field of inorganic molecular sieve membrane materials and membrane separation. According to the method, a high-nutrition reaction system is constructed, the composition of a silicon source and an alkali source is accurately regulated and controlled, rapid nucleation and efficient growth of molecular sieve crystals are realized in a relatively short time, and the high-crystallinity molecular sieve seed crystal is prepared; then uniformly loading the seed crystal on the surface of the porous support body to form a continuous and compact seed crystal layer; and then carrying out short-time hydrothermal growth by utilizing the eutrophic reaction liquid, and rapidly constructing the molecular sieve membrane with a complete structure and controllable thickness. The preparation method disclosed by the invention is simple and efficient, the preparation period of the molecular sieve membrane is effectively shortened, alternation and dense accumulation among crystals are promoted, and the generation of membrane defects is remarkably reduced. The prepared molecular sieve membrane shows excellent separation performance in pervaporation separation application of water and low-molecular-weight and low-polarity organic solvents (such as acetonitrile, ethanol, acetone, isopropanol, tetrahydrofuran, n-butyl alcohol, tert-butyl alcohol and dimethyl carbonate), and has a good industrial application prospect.

The invention belongs to the technical field of membrane separation, and particularly relates to a modified polyvinyl alcohol pervaporation composite membrane and application thereof in dehydration of an easily self-polymerized organic solvent. The composite layer comprises a porous support layer and an organic-inorganic hybrid separation active layer compounded on the surface of the support layer; the separation active layer is formed by a membrane casting solution containing polyvinyl alcohol, graphene oxide and a cross-linking agent through a cross-linking curing reaction. The graphene oxide with a two-dimensional lamellar structure is introduced into a cross-linked PVA network, a channel for preferential adsorption and rapid transmission of water molecules is constructed by utilizing rich oxygen-containing functional groups of the graphene oxide, and meanwhile, diffusion paths of organic matter molecules are increased by the lamellar structure of the graphene oxide, so that the permeation flux and separation selectivity of the membrane are synergistically improved. The composite membrane is especially suitable for dehydration of an organic solvent system containing styrene, acrylonitrile and other easily self-polymerized monomers, the problem of monomer polymerization caused by heating can be effectively avoided, and efficient and stable separation of heat-sensitive materials is achieved.

The invention discloses a two-dimensional nano material composite membrane for pervaporation molecule and ion separation and a preparation method and application of the two-dimensional nano material composite membrane, and belongs to the technical field of membrane materials. M-phenylenediamine, beta-cyclodextrin and completely stripped single-layer hydrotalcite nanosheets are compounded by adopting a specific process path; the composite membrane with a regular two-dimensional layered morphology on the surface and an ultra-thin structural characteristic is prepared, and the composite membrane is correspondingly endowed with high water flux and outstanding ion interception capability. The problem that the separation performance of a traditional interfacial polymerization membrane is difficult to balance is successfully solved.

The application relates to a preparation method of a polymer / MOF derivative composite membrane for preferential alcohol permeation, and belongs to the technical fields of composite materials and pervaporation. A silicon-containing polymer with suitable viscosity is spin-coated on the upper surface and gap of a MOF derivative membrane, and then a polymer / MOF derivative composite membrane is prepared after vacuum drying. The MOF derivative membrane is prepared by an in-situ growth and subsequent in-situ sulfuration two-step method through thioacetamide (TAA). The preparation method is simple and controllable, the polymer / MOF derivative composite membrane prepared has an ultrathin thickness, and the polymer pore penetration is effectively prevented. In addition, based on the superfast permeation path in the MOF derivative, when 5wt.% ethanol-water solution is separated at 60 DEG C, the composite membrane shows superhigh pervaporation performance and stability, and effectively improves the bottleneck problem of the trade-off in the separation membrane field.

The application relates to the preparation and application of a cobalt / zinc bimetallic organic framework film with alcohol priority, and belongs to the field of membrane technology. That is, hydroxyl cobalt salt and hydroxyl zinc salt are introduced on the surface of a porous carrier as heterogeneous nucleation sites of a metal organic framework (MOF) film, and then the carrier is placed in an organic ligand precursor solution containing a bimetal source to prepare a cobalt / zinc bimetallic MOF film with good continuity. The competition between cobalt and zinc metals further expands the pore size of the MOFs, and makes the crystal preferentially grow along the (211) crystal face. The expanded pore size is helpful for the transmission of ethanol molecules, and the preferential growth of the (211) crystal face further plays the hydrophobic effect of 2-methyl imidazole ligands in the MOFs to prevent water molecules from entering the pore. The ethanol separation factor is respectively increased by 127.3% and 163.2%. Finally, a solution containing a silicon-containing polymer and a curing agent is gradually coated on the bimetallic MOF layer to enhance the performance and stability of the pervaporation.

The utility model discloses an auxiliary fixing structure for a pervaporation organic membrane component, which relates to the technical field of pervaporation organic membrane components and comprises an organic membrane component body, a fixing mechanism is arranged on the outer side of the organic membrane component body and used for fixing the organic membrane component body, and the fixing mechanism comprises a positioning unit, a fixing unit and a fixing unit. The clamping device is arranged on the outer side of the organic membrane module body and comprises a base and a top seat, a double-thread screw is installed between the base and the top seat in a penetrating mode, and the base and the top seat are installed at the two ends of the double-thread screw through bolts to clamp the organic membrane module body and fix the organic membrane module body; and the limiting unit is arranged in the base, the positioning unit is arranged, the organic membrane module body is placed between the base and the top seat, the double-thread screw penetrates through the base and the top seat, and the organic membrane module body is fixed through the bolt, so that the organic membrane module body is fixed, and the conditions of leakage and looseness of the module in the use process are avoided.

The invention discloses a ZSM-5 zeolite membrane synthesized with the assistance of a pore channel filler and a preparation method and application thereof.The preparation method comprises the following steps that S1, a silicon source, an aluminum source, an alkali source, the pore channel filler and deionized water are mixed and stirred to be uniform, and a synthetic solution is obtained, specifically, the pore channel filler comprises triethylene glycol; s2, putting the carrier of which the surface is pre-coated with the seed crystal into a synthetic solution for crystallization to generate a related film layer, taking out a film material after crystallization is finished, and washing and drying the film material; and S3, activating the membrane material to remove the pore filling agent in the pore channels of the membrane so as to prepare the porous ZSM-5 zeolite membrane. According to the method, the green and low-cost triethylene glycol is used for replacing an organic ammonium template agent to synthesize the ZSM-5 zeolite membrane, the prepared zeolite membrane is good in grain intergrowth, the grain boundary defect in the ZSM-5 zeolite membrane is remarkably reduced, and the ZSM-5 zeolite membrane shows excellent separation performance in pervaporation dehydration and gas separation.

The invention relates to the field of pervaporation dehydration, in particular to a method for dehydrating ethylene glycol feed liquid with high conductivity. The SSZ-13 molecular sieve membrane with a high silica-alumina ratio is adopted as a key membrane material, good stability can be kept in pervaporation dehydration of ethylene glycol feed liquid with the conductivity of 50-2000 [mu] S / cm, and the dehydration capacity of the membrane material on ethylene glycol dehydration is further improved by modifying the membrane material.

The application relates to the field of high-molecular composite membrane materials, in particular to an interface joint reinforced composite membrane and a preparation method and application thereof. The preparation method comprises the following steps: S1, carrying out gas phase hydration treatment on Silicalite-1 particles which are surface modified by a silane coupling agent in a predetermined temperature and humidity environment, to obtain modified Silicalite-1 particles carrying a water molecule induced layer; S2, adding the modified Silicalite-1 particles carrying the water molecule induced layer into a polydimethyl diethoxysilane (PDMDES) prepolymer solution, and carrying out ultrasonic treatment in a 0-10 DEG C environment, to obtain a composite membrane solution; and S3, coating the composite membrane solution on the surface of a base film through a blade coating process, and carrying out step-by-step solidification in an oven, to obtain the interface joint reinforced composite membrane. The prepared interface joint reinforced composite membrane has excellent pervaporation separation performance on the basis of maintaining good thermal stability and reducing non-selective leakage channels.

The invention relates to the technical field of separation of mutually soluble methyl tert-butyl ether and methanol, in particular to a separation method of methyl tert-butyl ether and methanol based on an ultra-infiltration membrane. The method comprises the following steps: adding a high-polarity inducer into a methyl tert-butyl ether / methanol mixture to induce phase separation of a system so as to form a low-polarity methyl tert-butyl ether phase and a high-polarity methanol / inducer phase; a methyl tert-butyl ether phase selectively permeates through a porous ultra-infiltration membrane with a low-polarity functional layer, and a methanol / inducer phase is blocked, so that efficient separation of the methyl tert-butyl ether phase and the methanol / inducer phase is realized. Compared with traditional membrane separation technologies such as pervaporation, organic solvent reverse osmosis and evaporation osmosis, the method has the advantages of large separation flux, low energy consumption, simplicity and convenience in operation and the like, and has a good application prospect in industrial production of methyl tert-butyl ether.

This invention discloses an internal circulation system and method for regenerating desulfurization alkali solution based on causticization of calcium carbide slag. The system includes: a calcium carbide slag silo, a ball mill, a slurry tank, a slurry storage tank, a desulfurization tower, a waste liquid collection tank, a mixer, a Gore membrane filter, a causticization reactor, a first plate and frame filter press, a second plate and frame filter press, a waste acid tank, a nanofiltration membrane filter, a neutralization reaction tank, a cooling crystallizer, a centrifuge, a pervaporation dehydration device, a settling tank, a sand filter, and a regenerated alkali solution storage tank, all connected by pipelines. This invention constructs a cross-system internal circulation of alkali, calcium, and sulfur. It not only achieves self-sufficiency in alkali solution but also uses the solid residue to neutralize acidic wastewater from the acid production system, and the released SO2 is returned to the acid production system, realizing "waste treatment with waste." Simultaneously, the treated clarified liquid is reused for slurry preparation or other uses, achieving zero wastewater discharge and demonstrating significant economic and environmental benefits.

This invention relates to a ZIF-8@graphyne hybrid matrix membrane and its preparation method, belonging to the field of membrane separation technology. ZIF-8 and graphyne are in-situ composited using a solvothermal method to obtain a ZIF-8@graphyne material exhibiting both adsorption and diffusion selectivity. This material is then doped into an organic polymer matrix to prepare a hybrid matrix membrane. The resulting membrane has a three-layer structure consisting of a hybrid matrix layer, a pore-filled layer, and a porous substrate support layer, wherein the hybrid matrix layer and the pore-filled layer together form a selective separation layer. This structure fully utilizes the adsorption capacity of ZIF-8 for alcohol molecules and the regulating effect of the ordered pores of graphyne on molecular diffusion, effectively improving the separation performance of the membrane material in pervaporation separation of alcohol-water systems. The hybrid matrix membrane of this invention has the advantages of high flux and a large separation factor, making it suitable for the efficient recovery of bio-alcohols.

The present invention belongs to the technical field of membrane separation, and disclosed are an organosilicon membrane having a loose transition layer and a preparation method therefor and the use thereof. The present invention involves reacting carbon nanotubes with an acid, followed by washing and drying to obtain carboxylated carbon nanotubes (COOH-CNTs); uniformly mixing same with an SiO2-ZrO2 sol to obtain a COOH-CNTs / SiO2-ZrO2 sol; applying the sol onto a tubular ceramic support, and calcining same to obtain a ceramic support having a loose transition layer; and applying an organosilicon sol onto the resulting ceramic support having a loose transition layer, and heat-treating same to form a separation layer, so as to obtain the organosilicon membrane. The COOH-CNTs of the present invention enable sol particles to be dispersed in a linear network and inherently have hydrophilicity and a channel structure, allowing more water molecules to pass through same rapidly, and reducing the permeation resistance of water molecules in the transition and separation layers, resulting in a better separation performance in pervaporation separation of a solvent / water solution.

This invention relates to the field of polymer materials and membrane separation technology, and discloses a rigid porous polymer membrane based on the control of a confined reaction microenvironment and its applications. The rigid porous polymer membrane includes a substrate and a rigid porous polymer separation layer loaded on the surface of the substrate. The rigid porous polymer separation layer is formed by confined polymerization reaction in a confined reaction microenvironment. The preparation method of the rigid porous polymer separation layer includes: constructing a confined reaction microenvironment; preparing a reaction precursor solution; introducing the reaction precursor into the confined reaction microenvironment to undergo a confined polymerization reaction; and obtaining a rigid porous polymer membrane after washing and drying. This invention suppresses disordered explosive polymerization by controlling the reaction diffusion coupling behavior, and achieves the controllable preparation of ultrathin, continuous, dense and low-defect-rate rigid porous polymer membranes. The prepared rigid porous polymer membranes are applied in the fields of organic solvent nanofiltration, crude oil separation, gas separation, pervaporation, and selective sieving of small molecules.