1163 results about "Membrane technology" patented technology

The invention relates to the technical field of films, in particular to a flexible film special for a handwriting board and a preparation method of the flexible film. The flexible film is obtained by coating a release film with coating slurry and carrying out thermocuring, wherein the coating slurry contains modified polyurethane, a flatting agent, a defoaming agent and ethyl acetate. According to the modified polyurethane, polycarbonate diol, isophorone diisocyanate and other raw materials are subjected to a reaction, and a nano particle chain extender containing disulfide bonds is added. The nano particle chain extender containing disulfide bonds is prepared by modifying nano silicon dioxide and grafting cystamine dihydrochloride and diamino polyethylene glycol. Through nanoparticle surface modification and dynamic disulfide bond network construction, molecular-level coupling of a rigid reinforced phase and a flexible substrate, inhibition of nanoparticle aggregation and balance of strength and toughness are realized, the dynamic disulfide bond network can self-repair microcracks, and a high-quality special flexible film solution is provided for a high-performance handwriting board.

The invention relates to the technical field of capacitor films. The invention discloses a preparation process of a multilayer polypropylene capacitance film, which comprises the following steps: S1, raw material preparation: preparing basic resin, a nano ceramic filler, a nucleating agent and an antioxidant into multilayer raw materials respectively; s2, fusing multiple layers of raw materials by an independent screw extruder, and compounding by a co-extrusion die head to form a film blank; and S3, carrying out air ring gradient cooling on the film blank. And S4, longitudinally and transversely stretching the film blank. And S5, performing heat setting in a segmented heating furnace, and performing corona treatment to improve surface energy. And S6, segmentally curing the moisture-proof coating by using an infrared oven. The multilayer heterostructure is adopted, the comprehensive performance of the capacitor film is improved through material matching, the dielectric constant, the breakdown strength and the moisture resistance are enhanced, and the problem of considering the dielectric property and the mechanical property is solved. The innovative process guarantees stable performance, is compatible with an existing production line, can realize large-scale production, meets the requirements of fields such as new energy and the like, and provides a feasible scheme for localization of high-performance capacitor films.

The utility model relates to the technical field of PVD (Physical Vapor Deposition) coating, in particular to a PVD coating vacuum system, which comprises a feeding table, a sheet inlet / outlet chamber, a first buffer chamber, a process chamber, a second buffer chamber and an isolating valve, and the sheet inlet / outlet chamber, the first buffer chamber, the process chamber and the second buffer chamber are sequentially arranged behind the feeding table. Isolation valves are arranged between the feeding table and the sheet inlet and outlet chamber, between the sheet inlet and outlet chamber and the first buffer chamber, between the first buffer chamber and the process chamber, and between the process chamber and the second buffer chamber; and when the isolation valves are closed, all the chambers form closed chambers. According to the PVD coating vacuum system disclosed by the utility model, the isolating valves are arranged among the vacuum chambers, so that the vacuum degree of each vacuum chamber can be well controlled; the vacuum coating system is simple in structure, high in reliability, low in cost and capable of being used for research and development of PVD coating products, continuous production can be achieved, cost is saved to a great extent, and working efficiency is improved.

The application provides application of a temperature-sensitive composite material in preparation of a separation membrane, a nanofiltration membrane and a preparation method, and particularly relates to the technical field of separation membranes. The temperature-sensitive composite material comprises a temperature-sensitive material and conductive fillers. The mass ratio of the temperature-sensitive material and the conductive fillers is 10-30:1-10. The application utilizes the characteristic that the temperature-sensitive material quickly responds to temperature changes, and the temperature-sensitive material transmits to the outside world through the conductive fillers, so that timely feedback and adjustment of the temperature in the preparation process of the separation membrane are realized, the isotropic separation membrane is prepared, the stability of the performance of the separation membrane is ensured, and the quality of the separation membrane product is improved.

The invention relates to dry-method electrode multi-stage rolling film forming equipment and a differential rolling method, and belongs to the technical field of dry-method electrode calendaring, the dry-method electrode multi-stage rolling film forming equipment comprises a first-stage rolling mechanism, a second-stage rolling mechanism and a third-stage rolling mechanism which are sequentially arranged in the material advancing direction, the first-stage rolling mechanism is used for primarily rolling fibrous network coated particle powder into a first-stage membrane, and the second-stage rolling mechanism is used for primarily rolling fibrous network coated particle powder into a second-stage membrane; the second-stage calendering mechanism overlaps the two layers of first-stage diaphragms and performs differential speed thinning calendering to form second-stage diaphragms; the third-stage calendering mechanism overlaps the two layers of second-stage diaphragms and performs differential speed thinning calendering to form finished diaphragms; the differential calendaring method comprises the steps of powder fibration coating preparation, first-stage calendaring synergetic film forming, second-stage differential superposition calendaring, first-time online thickness-density closed-loop correction, third-stage differential superposition calendaring and second-time online thickness-density closed-loop correction. The problem that in an existing dry-method electrode calendering film forming technology, the consistency of the compaction density and the surface density of a film is poor is effectively solved.

The invention discloses a polytetrafluoroethylene microporous membrane as well as a preparation method and application thereof, and belongs to the technical field of polytetrafluoroethylene microporous membranes. According to the invention, the polytetrafluoroethylene microporous membrane added with different amounts and different types of lubricants is prepared by a thermomechanical two-way stretching method, and the pore structure is researched. According to the invention, the entanglement density, the average pore size, the porosity, the hydrophobic property and the mechanical property can be regulated and controlled by changing the quantity and the type of the lubricant. And a new idea is provided for preparing the high-performance PTFE biaxially oriented film, and the method has a good application prospect.

The invention relates to the technical field of membranes, in particular to a photocatalytic self-cleaning BiOCl / COF composite membrane as well as a preparation method and application thereof. BiOCl nanosheets and COF nanosheets with photocatalytic characteristics are synthesized respectively, the two nanosheets are deposited on the surface of a polymer substrate film through a vacuum filtration technology, and due to the fact that a large number of oxygen-containing groups in the COF nanosheets improve the dispersity of the bismuth oxychloride nanosheets through hydrogen-bond interaction, disordered stacking of BiOCl in the stacking process is reduced, and the photocatalytic performance of the BiOCl nanosheets is improved. The COF is added to assist the bismuth oxychloride nanosheets in forming an interlayer channel with a screening effect, and the two nanosheets form a heterostructure, so that the photocatalytic capability of the composite film is enhanced. The preparation method of the composite membrane is simple, and the composite membrane has good permeability to Evans blue, Congo red, rhodamine B and other dyes, has excellent photocatalytic self-cleaning ability, and can be applied to separation of organic wastewater generated in the printing and dyeing industry.

The utility model discloses an MOBR membrane bioreactor, which belongs to the technical field of MOBR membranes, and adopts the technical scheme that the MOBR membrane bioreactor comprises a shell, a shell cover is arranged at the top of the shell, an adjusting mechanism is arranged in the shell, and a membrane body is arranged in the shell; the adjusting mechanism comprises two limiting plates, an adjusting plate and a plurality of pull rods, the rear side of the adjusting plate makes contact with the rear side of the inner wall of the shell, the rear sides of the limiting plates are fixedly connected with the front side of the adjusting plate, the rear sides of the pull rods are fixedly connected with the front side of the adjusting plate, and the top of the adjusting plate is rotationally connected with a threaded column; the rear side of the top of the shell is fixedly connected with a fixing plate, and the problems that the sewage treatment effect of the MOBR membrane bioreactor is limited due to the fact that the area size of MOBR membranes arranged in most existing MOBR membrane bioreactors is inconvenient to adjust, and the use effect is affected due to the fact that stains on the surfaces of the MOBR membranes are inconvenient to clean are solved.

The invention discloses a ZnO / PES mixed matrix ultrafiltration membrane and a polyaniline-ZnO / PES mixed matrix nanofiltration membrane as well as a preparation method and an application of the ZnO / PES mixed matrix ultrafiltration membrane and the polyaniline-ZnO / PES mixed matrix nanofiltration membrane. PES is used as an organic polymer, PEG1500 is used as a pore-foaming agent, ZnO is used as a nano filler, and the ZnO / PES composite ultrafiltration membrane is prepared through a non-solvent induced phase inversion method. The preparation method comprises the following steps: synthesizing a polyaniline coated ZnO nano composite material, blending zinc nitrate hexahydrate in ammonia water with a polyaniline solution to form a nano composite structure, and preparing the polyaniline-ZnO / PES mixed matrix nanofiltration membrane by taking the synthesized nano composite particles as a filler. According to the mixed matrix membrane technology, alkali and lignin in the black liquor can be directly recovered, compared with alkali recovery through a combustion method, the mixed matrix membrane technology has the advantages of being easy to operate, not complex in process, low in investment cost, small in occupied area, low in energy consumption, good in environmental compatibility and the like, and meanwhile subsequent high-valued comprehensive utilization can be conducted on lignin.

The invention belongs to the technical field of polytetrafluoroethylene microporous membranes, and relates to an Al2O3 / PTFE composite microporous membrane and a preparation method and application thereof.The Al2O3 / PTFE composite microporous membrane is composed of Al2O3 nanoparticles and PTFE resin, the porosity is 65%-95%, the thickness is 3-25 microns, the average pore size is 0.10-1.5 microns, the transverse and longitudinal tensile strength is larger than or equal to 20 MPa, and the water contact angle is smaller than or equal to 90 degrees. According to the invention, the Al2O3 / PTFE composite microporous membrane is endowed with good surface wettability and excellent mechanical property by utilizing self-humidifying and in-situ reinforcement of Al2O3 nanoparticles, and the Al2O3 / PTFE composite microporous membrane is mainly applied to a reinforcing material of a proton membrane. The preparation process is simple, and industrial popularization is easy to realize.

The invention relates to a low-temperature amino cross-linked modified self-polymerized microporous polymer gas separation membrane, a preparation method and application, and belongs to the technical field of gas separation membranes, and the preparation method comprises the following steps: 1) synthesizing a cross-linked precursor polymer PIM-BM through a bromomethylation reaction; (2) preparing a membrane casting solution from the PIM-BM and a micromolecular amine cross-linking agent, casting, and volatilizing to form a membrane; and 3) carrying out heat treatment at 40-80 DEG C under a vacuum condition for 6-32 hours to form a cross-linked network structure, wherein the thickness of the film is 40-120 microns. According to the invention, a covalent cross-linked network is constructed through a low-temperature Hofmann alkylation reaction of an amine cross-linking agent so as to limit the movement of a polymer chain segment; the strong CO2 affinity of amido (-NH2) realizes dissolution selectivity compensation, and the diffusion selectivity synergistic effect of an inherent micropore channel of PIM-BM is combined, so that the tradeoff limitation of permeability-selectivity of a traditional gas separation membrane is broken through; the cross-linked structure can effectively improve the physical aging resistance of the PIM-BM film, and has good long-term continuous operation stability; the preparation process is low in low-temperature process energy consumption, easy to scale, suitable for the fields of coal-fired flue gas CO2 capture, natural gas purification and the like, and has industrial application potential.

The invention belongs to the technical field of anaerobic membranes, and particularly relates to an anaerobic membrane bioreactor for treating artemia culture tail water. Comprising a frame body framework, and a plurality of flat plate type anaerobic membranes are arranged in the frame body framework; the plurality of flat plate type anaerobic membranes are respectively provided with a distance-control moving assembly; the distance-control movable assembly comprises two displacement racks which are relatively positioned at the top of the frame body framework, and a plurality of flat plate type anaerobic membranes are linearly arranged along the tooth space trend of the displacement racks; an integral position adjusting unit is arranged on the displacement rack; a T-shaped substrate is mounted at the top of the flat plate type anaerobic membrane; two positioning square columns are symmetrically mounted at the top of the T-shaped base plate; and the position of the flat plate type anaerobic membrane can be conveniently and quickly adjusted through the distance-control moving assembly, so that the flat plate type anaerobic membrane is prevented from being damaged by excessive impurities due to the fact that the flat plate type anaerobic membrane is located in an area with relatively high flow speed for a long time, the service life of the flat plate type anaerobic membrane is prolonged, and the limitation of the reactor in use is further reduced.

The invention discloses a gas separation membrane and a preparation method thereof, and belongs to the technical field of gas separation membranes. The gas separation membrane comprises a separation layer comprising a network and PTI nanosheets dispersed in the network, the network comprising at least one of a biopolymer network and a chemical polymer network; selectively, the device further comprises a supporting layer which is arranged below the separation layer and is combined with the separation layer. The preparation method of the gas separation membrane comprises the following step A or step B: step A: enabling raw materials of PTI nanosheets and networks to form a membrane on the surface of polymer hydrogel to obtain the gas separation membrane; and step B, enabling the PTI nanosheet and the network raw material to form a membrane on the surface of the material of the support layer to obtain the gas separation membrane. The gas separation membrane provided by the invention is an N2 preferential permeation membrane, and has relatively high N2 permeation rate and relatively high N2 / CO2 selectivity.

The invention discloses a method and a device for determining a diffusion coefficient in a charged micropollutant nanofiltration membrane in the technical field of membranes. The method comprises the following steps: arranging a four-electrode electrochemical system in an H-type electrolytic tank, adding a micropollutant solution into the H-type electrolytic tank, and analyzing the micropollutant solution by adopting linear scanning voltammetry to obtain first data; according to the method, a micro-pollutant solution system, a micro-pollutant solution and nanofiltration membrane system and micro-pollutant solutions and nanofiltration membrane systems with different concentrations are tested and analyzed based on a four-electrode electrochemical system in an H-shaped electrolytic tank, and corresponding solution intrinsic conductivity data, system conductivity data and open-circuit voltage data are obtained; the method has the advantages of simple test steps, fast data acquisition, short overall test period, fast replacement and adjustment of the micropollutant solution and the nanofiltration membrane, wide application range, simple and effective linear fitting data processing process, and good repeatability.

The invention discloses a preparation method of an artificial cell coated with a macrophage membrane, and belongs to the technical field of artificial cell preparation. The preparation method comprises the following steps: dissolving poly (diallyldimethylammonium chloride) and sulfobutyl-beta-cyclodextrin in ultrapure water, and mixing an aqueous solution of the poly (diallyldimethylammonium chloride) and an aqueous solution of the sulfobutyl-beta-cyclodextrin to obtain a PDDA / SBE-beta-CD condensation liquid droplet solution; and mixing the macrophage membrane suspension and the PDDA / SBE-beta-CD condensed fluid drops in an equal mass ratio, and realizing in-situ coating of the macrophage membrane by adopting an ultrasonic coating technology to obtain the artificial cell coated with the macrophage membrane. The PDDA / SBE-beta-CD condensation liquid droplet constructed by the invention has good stability under the conditions of physiological salt concentration and pH and at 37 DEG C; the artificial cell coated with the macrophage membrane is prepared by mixing with the macrophage membrane suspension, and the macrophage membrane serving as a shell not only can prevent aggregate aggregation, but also can improve the structural stability and biocompatibility.

The invention belongs to the technical field of electroplating, and particularly discloses a real-time supplementing method for plating solution metal cations during electroplating. Aiming at the problems of large concentration fluctuation of metal cations and low supplementing efficiency in the traditional electroplating process, the method realizes dynamic balance of the metal cations through an electroplating synchronous electrolysis and anion exchange membrane technology. According to the technical key points, an electroplating liquid chamber and an electrolyte chamber are separated by adopting an anion exchange membrane; ions are supplemented by electrolyzing a soluble single-metal anode corresponding to metal to be plated, and meanwhile, an electrolytic cathode is arranged in an electrolyte chamber, so that metal deposition is avoided; the ion-selective electrode is used for monitoring the concentration of metal cations in real time, and the electrolytic current is automatically adjusted when the concentration deviation exceeds + / -5%. According to the method, ions are directionally supplemented through electrolysis, plating solution pollution and component fluctuation are avoided, and the uniformity and the qualification rate of a plating layer are improved. And the method is suitable for single-metal and multi-element alloy electroplating systems, can be integrated in processes such as jet electrodeposition and bath plating, is high in adaptability, and has industrial application potential.

The utility model relates to a sewage treatment device combining two-stage AO (Anaerobic Oxic) and MBR (Membrane Bio-Reactor) membrane technologies, which is characterized in that sewage to be treated in the sewage treatment device sequentially passes through a water inlet pipe, a first anoxic tank, a first aerobic tank, a second anoxic tank, a second aerobic tank, an MBR membrane tank and a water outlet pipe, and anoxic tank fillers are arranged in the first anoxic tank and the second anoxic tank; aerobic tank suspended fillers are arranged in the first aerobic tank and the second aerobic tank, an MBR membrane is arranged in the MBR membrane tank, the self-priming pump and the ultraviolet disinfection instrument are arranged in the equipment room, an MBR membrane tank water outlet pipe and an MBR membrane tank water outlet pipe are arranged on the wall of the equipment room, and the self-priming pump is arranged on a pipeline between the MBR membrane tank water outlet pipe and the MBR membrane tank water outlet pipe. The sewage treatment device disclosed by the utility model can be used for effectively treating sewage in village and town environment sensitive areas, expressway service areas, high-speed rail stations and other scenes, is a sewage treatment device integrating two-stage AO and MBR membrane technologies, and is good in sewage treatment effect and high in integration level.

The invention discloses a large-flux high-precision ceramic flat sheet membrane for removing iron and fishy smell of drinking tap water and a preparation method thereof, and belongs to the technical field of ceramic flat sheet membranes. The ceramic flat sheet membrane comprises a support body, a high-precision filter layer, an adsorption layer and a filling adsorbent. The preparation method comprises the following steps: 1) preparing a ceramic flat sheet membrane mud green body; (2) preparing a ceramic flat sheet membrane support body; 3) preparing a high-precision filter layer by a dip-coating method; (4) preparing an adsorption layer by a spraying method; and (5) filling a reinforced adsorbent and packaging an end. According to the present invention, the ultra-fine membrane material is used to produce the high separation precision, the effluent quality is ensured, the operation cost of the split type filtration is reduced, the molecular sieve adsorption membrane and the enhanced filling adsorbent are produced, and the iron ions in the urban tap water are effectively adsorbed; the vacuum dip-coating method is matched with the one-time sintering process, so that the working procedures can be saved, the yield is high, the membrane layer thickness and the membrane surface are uniform and consistent, basically no pore defect exists, and the flux and the precision stability of the ceramic flat membrane product are further stabilized.

The invention belongs to the technical field of membranes, and particularly relates to a composite membrane with polyfunctional group organic mesoporous nanoparticles as a middle layer and a preparation method of the composite membrane. The composite membrane is of a three-layer structure and comprises a porous supporting layer, a middle layer and a selective separation surface layer, the middle layer is polyfunctional group organic mesoporous nanoparticles with good water dispersibility and excellent stability, and the selective separation surface layer is polyamide; the preparation method comprises the following steps: loading organic mesoporous nanoparticles on the surface of the porous support layer to form the middle layer; and polymerizing on the surface interface of the middle layer to form a selective separation surface layer. The middle layer contains polyfunctional groups, can interact with a water-phase polyamine monomer and controls the diffusion of the monomer in an interfacial polymerization process, so that the structure of the selective polymer separation layer is regulated and controlled, and the surface appearance and thickness of the separation layer are optimized; due to the mesopore hydrophilic property of the middle layer, a rapid water transmission channel can be constructed, and the membrane flux is effectively improved. The composite membrane provided by the invention has excellent water flux, salt rejection rate and monovalent and divalent anion selectivity.

The invention relates to a wear-resistant and corrosion-resistant polyurethane film for the front edge of a wind power blade and a preparation method thereof, and belongs to the technical field of films. The dispersion and binding force of graphite-phase carbon nitride in a waterborne polyurethane emulsion are remarkably improved through ultrasonic-assisted solvent stripping, the dispersion and interfacial compatibility are further optimized by introducing carboxymethyl chitosan, and a composite film is formed on the surface of a matrix, so that corrosive ions are effectively shielded, the corrosion resistance is enhanced, and the service life is prolonged. The photocatalytic performance of the graphite-phase carbon nitride can also endow the film with self-cleaning and anti-photoaging capabilities. Besides, the carbon nanotubes and the silicon dioxide are compounded by adopting an in-situ hydrolysis technology, so that the interaction force between the carbon nanotubes and the silicon dioxide is remarkably enhanced, the overall performance of the composite filler is improved, the compatibility between the composite filler and polyurethane is enhanced by introducing a silane coupling agent, and the uniformity and stability of the membrane are ensured; the composite filler combines the impact resistance of the carbon nanotubes and the hardness and wear resistance of silicon dioxide, so that the film shows higher strength and durability under complex stress.

The utility model belongs to the technical field of hot melt adhesive film covering, and discloses an automatic door pocket plate covering machine which comprises a machine frame, a feeding device, an unwinding device, a film winding device, a film cutting device, a gluing device, a pressing roller device, a pressing wheel device, a width adjusting device and a control device and further comprises a handheld scanning gun used for identifying the width of a door pocket plate. The width adjusting device comprises a moving plate arranged on the rack and a first driving device used for driving the moving plate to move, and the pressing wheel device is fixedly arranged on the moving plate; the film cutting device comprises a cutter arranged on the rack and a second driving device used for driving the cutter to move. The signal output end of the handheld scanning gun is connected with the signal input end of the control device, and the signal output end of the control device is connected with the signal input end of the first driving device and the signal input end of the second driving device. The film laminating machine can greatly reduce the workload and improve the width adjusting precision and efficiency, is high in automation degree, and is suitable for laminating the door pocket plates with non-uniform specifications.

The invention relates to the technical field of special polymer functional membranes, and discloses a polybenzimidazole gas separation membrane as well as a preparation method and application thereof, the polybenzimidazole gas separation membrane has an interpenetrating network-shaped pore structure, and the polybenzimidazole gas separation membrane has a nanoscale pore structure. The pore size distribution of the nanoscale pore structure is 0.1-30 nm, and the average pore size of the nanoscale pore structure is 1-80 nm. The polybenzimidazole gas separation membrane has an interpenetrating network-shaped pore structure and a nanoscale pore structure, so that the polybenzimidazole gas separation membrane has relatively high gas selectivity and permeability coefficient and also has relatively good mechanical properties.

The invention is applicable to the technical field of cover films, and provides a three-bubble nine-layer co-extrusion production process of a high-barrier heat-shrinkable cover film, which comprises the following steps: weighing raw materials of each layer; melting each layer of raw materials through a screw rod, extruding in a nine-layer circular extruder, and superposing multiple layers to form a film blank; the film blank is rapidly cooled and formed by cooling water at the temperature of 5-20 DEG C, and then enters an infrared heating system to be heated to the blowing temperature of 80-90 DEG C; the film blank is longitudinally stretched, compressed air is introduced for transverse inflation, then the film blank enters an infrared heating cylinder for shaping treatment, and a film is obtained through air ring cooling; the film is subjected to corona treatment and ultraviolet irradiation treatment through a corona machine, the film is rolled, and the high-barrier heat shrinkage cover film is obtained.The prepared high-barrier heat shrinkage film is high in barrier property to air and water vapor and good in mechanical property, and the modified lignin, the modified polyethylene glycol and the modified aerogel are added into the bonding layer and cooperate with one another, so that the high-barrier heat shrinkage cover film is obtained. The barrier property and the mechanical property of the thermal shrinkage film are improved.

The invention provides a preparation method of a high-adhesive-force antibacterial film for an invisible oral appliance, and belongs to the technical field of high-adhesive-force antibacterial films, the high-adhesive-force antibacterial film is prepared by sputtering a target material to a substrate, the target material comprises an antibacterial material and a dopant, and the substrate is a glass substrate; zinc oxide is used as a main antibacterial material of the antibacterial material, and gallium sesquioxide is used as a doping agent. The preparation method comprises the following steps: manufacturing a glass substrate according to a basic ratio range, and mixing zinc oxide and gallium sesquioxide to manufacture a target material; a magnetron sputtering technology is adopted, a target material is sputtered with self-adaptive time sequence power, pure Ar gas is adopted as sputtering gas, the whole sputtering process is kept at the normal temperature, and a GZO thin film is deposited on a substrate; black and white grid images are attached to the non-sputtering surface of the substrate; the prepared high-adhesion antibacterial film is applied to the surface of an invisible oral appliance to serve as an antibacterial protective layer. The problem that an existing antibacterial protective film is not high in adhesive force is solved.

The invention provides low-molecular-weight araboxylan as well as a preparation method and application thereof, and belongs to the technical field of biological extraction and purification. The method comprises the following steps: by taking wheat bran as a raw material, pretreating, further fully exposing arabinoxylan in wheat bran by adopting an extrusion expansion coupling steam explosion technology, hydrolyzing by xylanase, decoloring, carrying out ion exchange refining treatment, and separating and purifying components by adopting a multi-stage membrane technology, so as to obtain the arabinoxylan. And finally, preparing araboxylan with different molecular weights. Through the process, on one hand, arabinoxylan with different molecular weights is obtained, the molecular composition is optimized, on the other hand, the content and purity of arabinoxylan with small molecular weight are further improved, and the adaptability of the product is improved.

The invention discloses a seawater carbon source and carbon sink cyclic conversion system and method, and the system comprises a seawater carbon sequestration unit which is used for receiving seawater and mixing the seawater with carbon dioxide and alkali to generate carbonate precipitate so as to obtain pre-softened seawater; the deep hardness removal unit is used for receiving the pre-softened seawater and treating the pre-softened seawater to obtain hardness-removed seawater; the deep concentration unit is used for receiving the hardness-removed seawater and concentrating the hardness-removed seawater to obtain concentrated seawater; the bipolar membrane unit comprises a salt chamber, an acid chamber and an alkali chamber and is used for receiving the concentrated seawater and preparing acid and alkali; and the seawater carbon capture unit comprises a first degassing film, a first adjusting tank, a second degassing film and a second adjusting tank which are connected in sequence. The bipolar membrane technology is adopted for treating softened seawater to prepare acid and alkali in situ, acid is provided for the seawater carbon sequestration unit, alkali is provided for the seawater carbon capture unit, the two processes of seawater carbon sequestration and seawater carbon capture are coupled, and acid and alkali consumption balance and seawater carbon source and carbon sink circulation conversion are achieved.

The invention discloses a circulating water blow-off water reuse treatment system, and relates to the field of circulating cooling water treatment, the system comprises: an induced crystallization unit, which is used for carrying out primary treatment on circulating water blow-off water through an induced crystallization fluidized bed reactor to remove hardness ions in water; the ceramic membrane filtering unit is used for carrying out secondary treatment on the primarily treated water by utilizing a ceramic membrane device and removing residual hardness ions, organic matters and suspended matters in the water; and the nanofiltration membrane unit is used for performing tertiary treatment on the water by utilizing a nanofiltration membrane according to the secondary treatment result to remove salt and organic matters in the water. According to the method, induced crystallization, ceramic membrane and nanofiltration membrane technologies are combined to cooperatively treat the circulating water and the blow-down water, so that the operation mode of simplifying the process, reducing the energy consumption and prolonging the backwashing period is realized, the dosage of chemicals and the generation of sludge are reduced, and the water recovery rate is also improved, so that the hardness is removed, and the calcium resource recovery is realized.

The invention discloses a dry-method solid-state electrolyte membrane as well as a preparation method and application thereof, belongs to the technical field of dry-method solid-state electrolyte membranes, and overcomes the defects that in the prior art, a relatively thin dry-method solid-state electrolyte membrane is easy to crack, cannot be self-supported and is low in ionic conductivity, and the solid-state electrolyte membrane is in poor contact with a solid-solid interface of an electrode. The dry-method solid electrolyte membrane comprises the following components in percentage by mass: 90%-96% of a solid electrolyte material, 1.5%-3% of polytetrafluoroethylene and 1%-8.5% of a lithiated polymer, the lithiated polymer comprises a lithium salt and a non-polar polymer; the number-average molecular weight of the non-polar polymer is less than or equal to 105, the melting point of the non-polar polymer is less than or equal to 55 DEG C, and the ionic conductivity of the non-polar polymer is greater than or equal to 10 <-6 > S / cm. The transverse tensile strength, the longitudinal tensile strength, the ionic conductivity and the cycle performance of the dry-method solid electrolyte membrane are remarkably improved.

The invention provides a high-hardness wastewater chemical membrane coupling softening method which comprises the following steps: firstly, carrying out chemical pretreatment on high-hardness wastewater to obtain softened wastewater, and carrying out flocculent precipitation on the softened wastewater to remove suspended solids and residual hardness ions in the softened wastewater to obtain flocculent precipitation wastewater; the method comprises the following steps: flocculating and precipitating wastewater, filtering the flocculated and precipitated wastewater to obtain filtered wastewater, carrying out membrane separation on the filtered wastewater to obtain separated wastewater, and carrying out evaporative crystallization on the separated wastewater to crystallize salt in the separated wastewater so as to soften the high-hardness wastewater. According to the method, through coupled use of chemical pretreatment and a membrane technology, the softening efficiency is improved, the use of chemical agents is reduced, and the treatment cost is reduced.

The invention discloses a preparation method of an ultrathin sulfide solid electrolyte dry-method membrane, relates to the technical field of solid electrolyte dry-method membranes, and solves the problems that a traditional solid electrolyte dry-method membrane needs to be subjected to transfer printing after being rolled, holes and cracks exist in an electrolyte membrane during transfer printing, and the thickness of the electrolyte membrane is difficult to reach 30 microns or below. Comprising the following steps: S1, preparing a positive thick film; s2, preparing an electrolyte thick film; s3, sequentially stacking the release film, the positive electrode thick film and the electrolyte thick film to form a laminated structure; s4, carrying out multi-stage rolling on the laminated structure by using a roller press and adopting a differential temperature multi-stage composite rolling method, and carrying out synchronous thinning and compounding on the positive electrode thick film and the electrolyte thick film to form a composite film; and S5, stripping the release film from the composite film to obtain the ultrathin sulfide solid electrolyte dry film. The problem that holes and cracks are generated in the transfer printing link after rolling of a traditional electrolyte thick film is solved.