5469 results about "Composite membrane" patented technology

The invention discloses a hydrophobic-hydrophilic Janus water collecting film and an efficient preparation method thereof, and belongs to the field of water collecting materials. An electrostatic spinning process is adopted, and a hydrophobic polymer is accurately deposited on the surface of a hydrophilic substrate in the form of a nanofiber array, so that the Janus composite membrane with an asymmetric wetting gradient structure is successfully constructed. The unique double-sided wettability difference drives the liquid drops to realize directional transmission, and the core mechanism of the liquid drops is derived from capillary force regulation and control caused by interfacial wetting potential energy difference. The Janus membrane shows excellent performance in the aspect of air moisture trapping, the ultra-fast moisture absorption characteristic and the surface regeneration capacity are achieved, and compared with a traditional single-layer hydrophilic membrane, the water collecting efficiency is remarkably improved by 110%. A one-step forming process is adopted for preparation, the diameter of the nanofibers is controllable, complex post-treatment procedures are not needed, and energy consumption required by equipment is low. The high-performance water collecting film has important application value in the fields of atmospheric water taking in arid regions, dehumidification of precise instruments and the like.

The invention relates to the technical field of polymeric membrane materials, and particularly discloses an antistatic polyethylene composite membrane and a preparation method thereof. Comprising the following raw materials in parts by weight: 100 parts of low-density polyethylene, 5-9 parts of high-density polyethylene, 10-20 parts of maleic anhydride grafted polyethylene, 8-15 parts of a polyvinyl alcohol modified material, 3-5 parts of antistatic modified carbon black, 0.5-1 part of an antioxidant and 1-2 parts of a dispersing agent, the polyethylene composite film has excellent dispersibility, can effectively enhance the mechanical properties of the polyethylene composite film through the synergistic effect of physical filling and chemical grafting, forms a layer of conductive network structure, namely a conductive film, on the surface of the material through the combined effect of the polyethylene composite film and the antistatic agent, prevents the generation and accumulation of static electricity, and has good compatibility among the raw materials. And the material has excellent mechanical property and antistatic property.

The invention discloses an ultrahigh-barrier homogenized composite packaging film and a preparation process thereof, and belongs to the technical field of packaging materials. The ultrahigh-barrier homogenized composite packaging film comprises a base material layer, an ink layer, a barrier layer and a heat sealing layer, wherein the base material layer is a BOPP film, the ink layer is water-based ink, the barrier layer is a VMBOPP film, and the heat sealing layer is a PE composite film; the BOPP film is prepared from the following raw materials in parts by mass: 60 to 70 parts of polypropylene, 15 to 22 parts of hyperbranched polymer modified POE (Polyolefin Elastomer), 10 to 18 parts of ethylene-vinyl acetate copolymer, 0.1 to 0.5 part of nucleating agent and 0.1 to 0.4 part of antioxidant. The ultrahigh-barrier homogenized composite packaging film disclosed by the invention is simple in preparation process and stable in structural barrier property, has ultrahigh oxygen barrier property and water vapor barrier property and excellent mechanical strength, toughness and high and low temperature resistance, a heat sealing process is easy to control, and the edge sealing flatness after packaging is improved; the single polyolefin material is adopted, the raw materials are environment-friendly, the barrier property of the same structure of an aluminum foil can be obtained, and the cost is reduced.

The invention relates to the technical field of high polymer material preparation, and discloses a bamboo fiber graft modified full-biodegradable composite membrane material preparation process which comprises the following steps: firstly, performing hot mixing and cooling on dried bamboo fiber powder, anhydrous citric acid, choline chloride, activated zinc oxide and pentaerythritol to prepare a bamboo fiber modified premix; then mixing the biodegradable polyester resin with the premix; adding the mixture into an extruder, injecting epoxidized soybean oil into a barrel through a liquid metering device, and performing melt extrusion granulation under a vacuum exhaust condition; and finally carrying out blow molding to form the film. Through in-situ reaction extrusion of multi-component synergism, surface grafting of bamboo fibers, chain extension of a polyester matrix and interface chemical bonding of the bamboo fibers and the polyester matrix are achieved, interface compatibility is effectively improved, degradation of the material in the processing process is inhibited, and the mechanical property and thermal stability of the composite film material are remarkably improved; the process is efficient and environment-friendly, and the cost is controllable.

The invention discloses a nanofiltration membrane for extracting lithium from salt lake brine with a high magnesium-lithium ratio and a preparation method of the nanofiltration membrane, and belongs to the technical field of nanofiltration composite membranes. The preparation method of the nanofiltration membrane comprises the following steps: first-time interfacial polymerization treatment, second-time interfacial polymerization treatment and post-treatment. The nanofiltration membrane with a double-layer lithium ion permeation channel is constructed through coupling of secondary interfacial polymerization and a B15C5 modification process, and stable permeation performance of the membrane is guaranteed while high magnesium ion rejection rate and high magnesium-lithium separation factor are realized through synergistic modification of crown ether and secondary interfacial polymerization. The nanofiltration membrane disclosed by the invention shows excellent performance in a real salt lake brine test, and in practical application, the membrane can effectively treat a complex brine system with a high magnesium-lithium ratio; and in a 24-hour continuous test, long-term stability is also shown, and an efficient, stable and feasible solution is provided for lithium extraction of the salt lake brine with the high magnesium-lithium ratio.

The invention discloses a graphdiyne multilayer composite membrane and a preparation method thereof, and belongs to the technical field of membrane separation. A porous base membrane with an alkynyl layer is obtained by adopting a two-step modification method, then the porous base membrane is soaked in a solution containing a graphdiyne monomer and a catalyst, and a reaction is performed at a certain temperature, so that a graphdiyne material fully grows on the surface of the porous base membrane. Adding a membrane casting solution formed by mixing an organic polymer, a cross-linking agent, a catalyst and an organic solvent to the surface of the graphdiyne-loaded porous base membrane, volatilizing the organic solvent, and curing at 80 DEG C to form the membrane. The ethanol permselective membrane has a three-layer membrane structure, namely the organic polymer layer, the ultrathin graphdiyne transition layer and the porous support layer, so that the problems of agglomeration and pore permeation of a nano material are effectively avoided, and the adsorption process of ethanol is further enhanced. The membrane prepared by the invention has higher pervaporation alcohol permeation performance, can efficiently and stably recover alcohols, and provides reference for the development of a novel pervaporation membrane structure with preferential alcohol permeation.

The invention relates to a preparation method and application of an organosilicon / MOF-303 mixed matrix membrane, a silicon source precursor is uniformly dissolved in an ethanol solvent, then a mixture of water and hydrochloric acid is added according to a certain proportion, a water bath heating reaction is carried out for a period of time to obtain an organosilicon sol, prepared MOF-303 powder is added into the organosilicon sol according to a certain proportion, and the organosilicon / MOF-303 mixed matrix membrane is obtained. The preparation method comprises the following steps: uniformly mixing the raw materials through ultrasound to obtain a separation layer sol, coating the prepared separation layer sol on a ceramic support body through a hot coating method, and calcining in an air atmosphere for a period of time to obtain the MOF-303 / mixed matrix membrane. An organic silicon substance BTESA with a rigid acetylene bridge structure is preferably selected as a precursor, an MOF-303 material with a high specific surface area is doped into the precursor, the pore channel structure of the membrane is modified, more adsorption sites are provided for water molecules, and the composite membrane material with the optimal separation performance is obtained by optimizing the composite proportion.

The invention relates to the technical field of composite film preparation, in particular to a multi-layer co-extrusion nano ceramic coating high-barrier medicine packaging composite film and a preparation method thereof.The multi-layer co-extrusion nano ceramic coating high-barrier medicine packaging composite film comprises a base material layer, a gas barrier layer, a bonding transition layer and a nano ceramic functional coating; the base material layer comprises the following components in parts by mass: 80-100 parts of biaxially oriented polypropylene; 20 to 30 parts of metallocene linear low density polyethylene; 5 to 8 parts of nano titanium dioxide; 0.5 to 1 part of beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid; and 0.3 to 0.6 part of calcium stearate. Through the multi-layer co-extrusion and gradient curing technology and the five-layer co-extrusion technology, it is ensured that the thickness of a base film is uniform and interlayer bonding is firm, the adhesive force of the coating is enhanced through plasma surface treatment, and activity retention and uniform distribution of functional components are guaranteed through the segmented curing strategy of the nano ceramic coating; compared with a traditional hot-pressing compounding or solvent coating process of the composite film, the energy consumption and the solvent residue risk are greatly reduced, meanwhile, the production efficiency and the product consistency are improved, and large-scale application is provided for medicine packaging.

The invention relates to the technical field of solid-state batteries, in particular to a solid-state electrolyte composite membrane, a preparation method thereof and a solid-state battery. The preparation method comprises the following steps: performing ultrasonic-initiated cross-linking polymerization on a polymer solid electrolyte monomer, a cross-linking agent and a surface hydroxylated oxide solid electrolyte to obtain a polymer-oxide solid electrolyte matrix, washing the polymer-oxide solid electrolyte matrix, and soaking the polymer-oxide solid electrolyte matrix in an electrolyte to obtain the solid electrolyte composite membrane. According to the invention, crosslinking of the polymer electrolyte monomer is initiated by ultrasound, and chemical bonds are formed between part of the polymer electrolyte monomer and the surface-hydroxylated oxide solid electrolyte, so that the interfacial compatibility of the polymer electrolyte monomer and the surface-hydroxylated oxide solid electrolyte is effectively improved, and the ionic conductivity, chemical stability and mechanical strength of the polymer electrolyte are improved; due to the properties of easy processing, good flexibility and the like of the polymer electrolyte, the interface compatibility between the oxide solid electrolyte and the positive and negative pole pieces can be fully improved, the flexibility and the processability are improved, and a win-win effect is achieved.

The invention relates to a preparation method for improving a sodium alginate pervaporation membrane by using a two-dimensional leaf-shaped zeolite imidazole framework (ZIF-L) material, and particularly relates to a preparation method for improving a sodium alginate pervaporation membrane by using a two-dimensional leaf-shaped zeolite imidazole framework (ZIF-L) material. The pervaporation mixed matrix membrane comprises a base membrane and a separation layer membrane, the base membrane adopts a polyacrylonitrile (PAN) membrane, and the separation layer is composed of ZIF-L and sodium alginate. According to the invention, the distribution of ZIF-L in the membrane is improved, directional arrangement is formed, and the separation effect and selectivity of the composite membrane are improved. A novel process is adopted, the defect problem of the ZIF-L-SA membrane is eliminated, the continuous ultrathin ZIF-L membrane is prepared through a secondary seed growth method, and the performance of the two-dimensional ZIF-L membrane is improved. The ZIF-L synthesis conditions are mild, the method is simple, hydrophilic modification of the membrane surface is achieved, an internal water molecule transmission channel is constructed, and the separation factor and stability of the membrane are improved. The prepared high-flux pervaporation membrane has a wide application prospect.

The invention relates to the technical field of packaging films, and particularly discloses a heat-resistant polyethylene composite packaging film and a preparation method thereof.The polyethylene composite packaging film comprises an inner layer, a middle layer and an outer layer, the inner layer is prepared from, by mass, 100 parts of linear low-density polyethylene, 28-32 parts of polypropylene and 8-10 parts of hydrotalcite modified blending materials, the middle layer comprises the following raw materials in parts by weight: 100 parts of low-density polyethylene, 40-60 parts of linear low-density polyethylene, 3-5 parts of a coupling agent and 0.5-1 part of an antioxidant, the outer layer comprises the following raw materials in parts by weight: 100 parts of modified PA6, 20-30 parts of metallocene polyethylene and 5-8 parts of a compatilizer, functional gradient distribution is realized by adopting layered extrusion of three-layer co-extrusion, and PA6 and polypropylene have a synergistic effect, so that the composite film has excellent heat resistance, and the service life of the composite film is prolonged. The hydrotalcite and the graphene oxide have a synergistic effect, the layered structure effectively obstructs oxygen and water vapor, and the obtained polyethylene composite packaging film is good in barrier property and has excellent mechanical property and heat resistance.

The invention belongs to the field of MOF (Metal Organic Framework) films, and discloses a two-dimensional metal-organic framework film composite film as well as a preparation method and application thereof. The preparation method comprises the following steps: dispersing ZIF-L nanosheets into a water phase solution containing MPD, camphor-10-sulfonic acid and TEA to obtain an MOF water phase monomer solution; adding TMC into an n-hexane reagent to obtain an organic phase monomer solution; fixing the wet PES ultrafiltration membrane, injecting the MOF water-phase monomer solution, carrying out suction filtration below the PES ultrafiltration membrane, removing the excess solution, keeping the suction filtration state, and immediately pouring the organic-phase monomer solution onto the surface of the PES ultrafiltration membrane from the upper part for reaction; and drying the obtained film at 60-80 DEG C for 10-15 minutes to obtain the two-dimensional metal-organic framework film composite film. The composite membrane has a good separation effect and can be applied to textile printing and dyeing wastewater treatment.

The invention provides a preparation method of an hourglass type covalent organic framework (COF) composite membrane, and belongs to the field of gas membrane separation. According to the method, covalent organic framework nanosheets with different pore diameters and charge characteristics are utilized to construct the COF composite membrane with a unique hourglass structure through a vacuum-assisted layer-by-layer assembly technology, so that precise regulation and control on H2 and CO2 gas transmission behaviors are realized, and the prepared composite membrane shows remarkable H2 / CO2 separation selectivity and high permeation flux, and has a good application prospect. The chemical stability, the thermal stability and the mechanical flexibility are excellent. The invention provides a novel solution for efficient gas separation and energy storage application.

The invention relates to the technical field of data processing, in particular to a data analysis method for preparing a polyethylene glycol active ester chitosan composite membrane. Decomposing the preparation feature monitoring sequence to obtain a residual feature time sequence; obtaining an outlier residual point according to the residual characteristic time sequence; determining a suspected preparation anomaly moment according to the quantity characteristic and the distribution characteristic of the outlier residual error points and the change characteristic of the residual error points at the recent historical moment of the outlier residual error points; obtaining a data change degree according to the data difference characteristics of the adjacent moments; obtaining a multi-dimensional difference coefficient according to the data change degree of the two dimensions at the suspected abnormal preparation moment; and obtaining a neighborhood difference coefficient at any position and within a preset neighborhood range according to the residual data at the suspected abnormal preparation moment. The final abnormal degree of preparation is obtained according to the multi-dimensional difference coefficient and the neighborhood difference coefficient, the preparation process is detected, the analysis accuracy of the preparation process is improved, and the interference of sensor errors is reduced.

The invention discloses a C5F10O mixed gas decomposition component adsorption material as well as a preparation method and application thereof. The adsorption material is a metal organic framework / nanofiber composite membrane which is prepared by uniformly dispersing a metal organic framework material on a nanofiber membrane obtained by an electrostatic spinning technology through a spraying doping method and is used for adsorbing decomposition components of C5F10O mixed gas. According to the adsorption material provided by the invention, through mutual cooperation of the metal organic framework material and the porous nanofiber membrane base material, a formed composite membrane has a larger specific surface area and more metal active sites, adsorption of gas molecules is promoted, permeation and diffusion of the gas molecules are also facilitated, and the adsorption efficiency is improved. Therefore, the gas sensitivity and the adsorption effect of the adsorption material are remarkably improved.

The invention discloses an anti-freezing PE (polyethylene) film, a composite film of the anti-freezing PE film and a related preparation method, relates to the field of packaging films, and aims to solve the problem of low freezing resistance and puncture resistance in the prior art. Comprising anti-freezing layer components: low-density polyethylene, high-density polyethylene, metallocene linear low-density polyethylene resin, cold-resistant PA66 resin, composite phosphate, olefin block copolymer resin, a modified nanoscale silicon oxide coupling agent and a nanoparticle toughening agent, and barrier layer components: low-density polyethylene, linear low-density polyethylene and high-density polyethylene. The toughening heat-sealing layer comprises the following components: low-density polyethylene, sarin resin, metallocene linear low-density polyethylene resin, EVA (Ethylene Vinyl Acetate) modified bonding resin, a slipping agent, a nanoparticle toughening agent, a modified nanoscale silicon oxide coupling agent, dioctyl adipate and an antioxidant. The composite material can resist-38 DEG C ultra-low temperature freezing, and is puncture-resistant, cold-resistant and excellent in barrier property.

The invention relates to an anti-yellowing automobile composite film and a preparation method thereof, and belongs to the technical field of high polymer materials. The yellow-resistant automobile composite film is prepared from the following components in parts by weight: 60 to 70 parts of PVC (Polyvinyl Chloride) master batch, 10 to 20 parts of TPU (Thermoplastic Polyurethane) master batch, 1 to 2 parts of plasticizer, 0.5 to 0.8 part of flatting agent, 0.1 to 2 parts of yellowing-resistant modifier and 0.1 to 2 parts of modified flame retardant, sym-triazine cyanuric chloride and a benzotriazole intermediate in the anti-yellowing modifier absorb ultraviolet rays and reduce yellowing of the ultraviolet rays on the composite material, and maleimide groups, maleic anhydride and isocyanurate rings for increasing the crosslinking density cooperate with one another, so that the heat resistance of the material is improved, and the yellowing is reduced; phosphorus and nitrogen main chains of phosphonitrilic chloride trimer in the modified flame retardant have a conjugation effect, so that a protective film is formed, oxygen is isolated, and the phosphonitrilic chloride trimer and nitrogen are synergistically flame-retardant; the anti-yellowing automobile composite film prepared by the invention not only has excellent ultraviolet absorption performance, heat resistance and anti-yellowing effects, but also has a good flame retardant effect.

The invention discloses a polyamide composite membrane based on a nanobubble-assisted free interface polymerization strategy and a preparation method and application of the polyamide composite membrane. Nanobubble precursors of different types and concentrations are loaded in a water-phase solution by a chemical method, and the polyamide composite membrane is prepared by means of reaction between the precursors and water or self-decomposition of the precursors. Nanometer bubbles are pre-constructed in a water phase solution, and under a free interface polymerization process, by utilizing upward migration of the nanometer bubbles at a neutralization phase interface of the water phase solution, hierarchical regulation and control of a polyamide separation layer structure are realized from bottom to top; according to the polyamide composite membrane, the bottom opening characteristic, the internal nano-cavity structure and the surface morphological characteristic of the polyamide separation layer are effectively improved, the transmembrane transmission rate of water molecules is remarkably increased, the hydraulic resistance is reduced, and the water flux of the membrane is remarkably improved on the premise that the salt rejection rate of the polyamide composite membrane is not sacrificed.

The utility model relates to the technical field of composite film preparation, and discloses a composite film rewinding device which comprises a bottom plate, two sets of supporting plates are symmetrically installed on the top of the bottom plate, winding drums and tensioning rollers are arranged on the supporting plates, a supporting beam is fixedly installed between the supporting plates, a telescopic air cylinder is installed on the supporting beam in a penetrating mode, and the telescopic air cylinder is fixedly installed on the bottom plate. A supporting frame is fixedly installed at the bottom of the telescopic air cylinder. According to the deviation rectifying device, the first forward and reverse screw rod is rotated to be matched with the action of the guide block and the guide groove, the first forward and reverse screw rod drives the two first deviation rectifying plates to move reversely so as to adjust the distance between the two first deviation rectifying plates, the second forward and reverse screw rod is rotated to drive the two second deviation rectifying plates to move reversely, and therefore the deviation rectifying effect on the composite film can be achieved; and the first deviation rectifying plate and the second deviation rectifying plate are limited through the first positive and negative screw rod and the second positive and negative screw rod correspondingly, deviation caused by vibration is prevented, and the deviation rectifying effect is optimized.

The invention discloses a preparation method and application of a polyamide composite nanofiltration membrane containing a graphdiyne middle layer, and belongs to the technical field of membrane separation. Comprising a porous substrate, a graphdiyne middle layer and a polyamide layer. The graphdiyne is selected from graphdiyne, graphdiyne, hydrogen-substituted graphdiyne and other graphdiyne derivatives. The specific preparation method comprises the following steps: carrying out suction filtration on graphdiyne dispersion liquid to a porous substrate, respectively dipping the graphdiyne dispersion liquid in a water phase and an oil phase, carrying out interfacial polymerization to generate a polyamide membrane, and finally, drying the membrane in a constant-temperature and constant-humidity drying oven to obtain the polyamide composite nanofiltration membrane containing the graphdiyne middle layer. The preparation method disclosed by the invention is simple and efficient, and the prepared composite membrane can effectively intercept divalent salt and organic matters in water and has excellent water permeability, ion separation and antibiotic desalination effects.

The invention belongs to the technical field of water electrolysis hydrogen production diaphragms, and relates to coating slurry for a composite diaphragm in an alkaline electrolytic cell and a preparation method of the coating slurry. The coating slurry comprises a high-molecular polymer, an inorganic hydrophilic oxide, a polymer electrolyte, a pore-foaming agent and an organic solvent. The high-molecular polymer is polysulfone, and the inorganic hydrophilic oxide is titanium dioxide; and the polymer electrolyte is acacia gum. And the pore-foaming agent is polyvinylpyrrolidone. Titanium dioxide is used as a filler, so that the hydrophilicity of the hydrophobic polysulfone membrane can be improved, and the transfer of hydroxyl ions is facilitated. Hydroxyl, amino and other hydrophilic groups of the acacia gum are migrated to a membrane-water interface, and the groups and a membrane matrix are combined to form a hydrogen bond network, so that the stability and the water adsorption capacity of the membrane are enhanced, and the composite membrane with low surface resistance, smooth surface, compact coating and good mechanical capacity is obtained. The nylon and the acacia gum are adopted, cost is low, and large-scale production is facilitated.

The invention relates to a preparation method of a nanofiltration membrane containing a covalent organic framework (COF) interlayer. The nanofiltration membrane (NF) comprises a base membrane, an interlayer and a separation surface layer. The interlayer is formed by in-situ growth of polyphenol and diamine under the action of an oxidizing agent, and the separation surface layer is formed by an aqueous-phase active monomer and multi-element acyl chloride through an interfacial polymerization reaction. According to the invention, an imino covalent organic framework (TpPa-COF) film interlayer is introduced, and a surface polyamide layer is prepared through interfacial polymerization, so that the hydrophilicity of the film and the ability of removing divalent cations are improved. The invention aims to solve the problem of balance between low flux and high separation effect of an NF membrane in separation of monovalent / divalent cations, maintain ideal water flux while ensuring high separation effect, and solve the problem that a traditional NF membrane separation layer has defects. The two-dimensional TpPa-COF material can effectively control the pore size distribution and hydrophilicity of the surface of the substrate and improve the separation performance of the composite membrane. The preparation method is simple, and the obtained nanofiltration membrane has a wide application prospect.

A bioreactor systems and processes for the production of biomass are provided. The systems comprise: at least one bioreactor unit which comprises at least one liquid-containable compartment. The liquid- containable compartment comprises, (i) a first wall, wherein the first wall comprises a composite membrane that is permissible to transfer of gases therethrough, wherein the composite membrane comprises at least one barrier layer and at least one reinforcement layer; and (ii) a second wall, wherein the second wall comprises material that is optically transmissible to visible light and that is substantially less gas permeable than the first wall, wherein the first and second walls cooperate to define the liquid-containable compartment within the bioreactor unit.

The invention discloses a conductive and heat-conducting hydrophobic polymer composite membrane as well as a preparation method and application thereof. The method comprises the following steps: preparing a PU nanofiber membrane through an electrostatic spinning technology; then AgNPs is adsorbed on the surface of the PU nanofiber through an interface hydrogen bond, contact thermal resistance and resistance are effectively reduced, MWCNTs are attached to the upper surface and the lower surface of the composite film through suction filtration and hot pressing, a sandwich structure is formed, and hydrophobicity is guaranteed while the resistance and the thermal resistance are further reduced. The resistance and the heat conductivity of the polymer composite film respectively reach 14.8 m omega / sq and 7.9 W (m K) <-1 >, and the water contact angle is 132.8 degrees. The excellent durability of the composite film is guaranteed through strong interface interaction, and the composite film has potential application prospects in multifunctional electric conduction and heat conduction composite materials.

The invention discloses a graphene composite film with high thermal conductivity and a preparation method and application thereof. The preparation method comprises the following steps: preparing a graphene film on a copper-nickel alloy substrate by adopting a CVD (Chemical Vapor Deposition) method; wherein the graphene film comprises a single-layer graphene structure and a pagoda-shaped multi-layer graphene core structure dispersed on the surface of the single-layer graphene structure; applying the graphene oxide slurry to the surface of the graphene film so as to form a graphene / graphene oxide composite film; and carrying out carbonization, graphitization and calendaring treatment on the graphene / graphene oxide composite film to prepare the graphene composite film with high thermal conductivity. The method not only solves the problems that the graphene film prepared by the traditional CVD method is thin in thickness and cannot be commercially used on a large scale, but also improves the heat-conducting property of the graphene film prepared by the oxidation-reduction method, and fully exerts the intrinsic characteristics of the graphene material, so that the graphene film has higher market competitiveness.

The invention belongs to the technical field of genetic engineering and biological medicine, and particularly discloses a cascade response type nano-particle with a microenvironment remodeling function and a preparation method and application of the cascade response type nano-particle. The nanoparticle provided by the invention adopts a bionic hybrid membrane engineering strategy: an inner core is formed by loading an exosome inhibitor on a nano material, and the surface is covalently coupled with M2 type macrophage specific targeting peptide; the outer layer coats a macrophage membrane and active oxygen response type liposome composite membrane layer through a co-extrusion technology, and is loaded with a TLR agonist. Animal experiments show that after being injected through caudal vein, the nano-particles are enriched at a tumor site in a targeted manner through homing receptors such as membrane surface integrin alpha4beta1 and the like, and outer membrane cracking is triggered in a high-ROS tumor microenvironment, so that space-time controlled release of a TLR agonist and targeted phagocytosis of an exosome inhibitor by macrophages guided by a targeted peptide are realized. The anti-tumor synergistic effect is achieved through multiple regulation and control mechanisms, and an effective treatment strategy is provided for tumor immunotherapy.

The invention discloses an MABR sewage treatment device and method based on an A + B composite membrane, and belongs to the technical field of river sewage treatment. The device comprises a composite membrane assembly, a membrane shell and a support frame, the composite membrane assembly is composed of multiple layers of bubble-free aeration membranes (A membranes) and a layer of micro-nano aeration membranes (B membranes), the bubble-free aeration membranes are distributed at intervals from top to bottom, and the micro-nano aeration membranes are arranged on the bottommost layer. Membrane shells are fixed on the two sides of the support frame; and each layer of membrane is communicated with the membrane shells on the two sides. Air enters from the top membrane shell and circulates from top to bottom in the multiple layers of membranes through left-right alternate flowing paths, and the contact area of the air and the membranes is increased. The bubble-free aeration membrane serves as a microbial carrier to degrade pollutants, and the micro-nano aeration membrane generates micro-nano bubbles for pressure relief, oxygenation and cleaning of residual substances on the surface of the bubble-free aeration membrane. Membrane pollution can be effectively relieved, the service life of the bubble-free aeration membrane is prolonged, membrane filaments are effectively prevented from being damaged due to too large pressure, and long-term stable operation of the system is guaranteed.

The invention discloses automobile intelligent sunscreen glass and a control system thereof, and relates to the technical field of sunscreen glass, the automobile intelligent sunscreen glass comprises a first glass substrate, a second glass substrate and a thermoplastic membrane arranged between the first glass substrate and the second glass substrate; a multi-layer functional film layer is arranged between the first glass substrate and the second glass substrate and comprises one or a combination of a heat insulation heating layer, a protective layer, a photoelectric conversion layer and an electrochromic dimming layer; a tourmaline functional film layer is arranged on the outer layer of the second glass substrate; the functional film layers have good compatibility and stability, function maximization can be achieved, and the riding experience is remarkably improved; the heat insulation heating layer and the electro-dimming layer are combined to form a composite membrane, and the composite membrane is connected with vehicle-mounted equipment through copper foil, wires and the like, so that intelligent control over heating and lighting is achieved.

The invention relates to the technical field of biochemical engineering and food processing, in particular to a fish collagen extraction process which comprises the following steps: S100, raw material pretreatment; s200, carrying out crushing and enzymolysis pretreatment; s300, carrying out an enzymatic hydrolysis reaction; s400, carrying out solid-liquid separation; s500, carrying out concentration treatment; and S600, drying treatment is carried out. The advanced spectrum analyzer is used for accurately determining the freshness of the fish body, the automatic cutting and ultrasonic cleaning technologies are combined, the quality of raw materials is effectively guaranteed, the enzymolysis reaction conditions are strictly controlled through the high-precision metering pump and the heat exchange system, the enzymolysis efficiency and the product quality are improved, and the production cost is reduced. By adopting a multi-layer composite membrane structure and a specific concentration technology, the efficiency and purity of solid-liquid separation and concentration treatment are remarkably improved, the production process is optimized, the energy consumption and the cost are reduced, pollutants in the production process are effectively removed through application of a plasma cleaning and air purification system, and the product quality is improved. And reliable guarantee is provided for production of high-quality fish collagen products.

The invention relates to the technical field of composite current collectors, and discloses a composite current collector. Comprising the following operation steps: S1, uniformly mixing thermal expansion microspheres and a polymer material, and performing melt extrusion and two-way stretching to obtain a current collector base film; s2, depositing a transition layer on each of the two surfaces of the current collector base film to obtain a composite collector film A; s3, depositing a metal layer on each of the two surfaces of the transition layer of the composite film A to obtain a composite film B; and S4, depositing a protective layer on each of the two surfaces of the metal layer of the composite film B to obtain the composite current collector.