566 results about "Solvent evaporation" patented technology

The application discloses a kind of carbon nanotube / polyaniline composite modified epoxy resin conductive paint and preparation method thereof, belong to coating technical field.The application is prepared by preliminary disentangling carbon nanotube with specific solvent, and the carbon nanotube dispersion liquid uniformly dispersed is obtained;Afterwards, polyaniline is added to carbon nanotube dispersion liquid, and carbon nanotube / polyaniline composite is prepared by solvent evaporation or purification;Finally, carbon nanotube / polyaniline composite is compounded with epoxy resin, and high-performance carbon nanotube / polyaniline composite modified epoxy resin conductive paint is obtained.The carbon nanotube / polyaniline composite modified epoxy resin conductive paint prepared by the application has more excellent mechanical properties and electrical properties than traditional conductive paint, and can be better applied in aerospace, battery, communication, new energy and other aspects.

The invention relates to a method for recovering mixed salts (mainly containing calcium chloride, sodium chloride and potassium chloride) from a household garbage incineration fly ash leaching solution, and particularly provides two separation technical schemes. The traditional separation method generally needs to use a large amount of decalcifying agent, so that the cost is high, calcium chloride cannot be effectively recycled, and the problem of resource waste exists. In order to solve the problems, the invention selectively dissolves calcium chloride in the mixed salt by adopting a specific organic solvent (such as ethanol or methanol) and utilizing the characteristics that the solubility of calcium chloride in the solvent is high, the solubility of sodium chloride and potassium chloride is low, and the boiling point is relatively low. And a calcium chloride product can be recovered after solvent evaporation. Furthermore, the residual mixed salt is further washed using the specific organic solvent to remove entrained calcium chloride, thereby obtaining a mixed salt containing predominantly sodium chloride and potassium chloride. According to the technical scheme 1, the mixed salt subjected to separation and calcium removal is subjected to dissolution treatment under the high-temperature condition, potassium chloride is dissolved, the particle size of sodium chloride crystals is promoted to be increased, the sodium chloride crystals are obtained through solid-liquid separation, and then mother liquor is cooled and crystallized to recover potassium chloride. According to the technical scheme 2, the mixed salt subjected to separation and calcium removal is subjected to aging treatment so as to promote particle size increase of sodium chloride and potassium chloride crystals, then the aged mixed salt is separated by adopting a flotation method, and sodium chloride and potassium chloride products are recycled respectively.

The invention provides a dual-targeting carrier material, a preparation method thereof and a preparation method of oleanolic acid nanoparticles wrapped by the dual-targeting carrier material, and belongs to the technical field of medicines. The oleanolic acid targeting nanoparticles are prepared by taking a dual-targeting high-molecular copolymer as a carrier material and adopting an emulsification-solvent evaporation method, so that the oleanolic acid can be protected from being quickly degraded, and the in-vivo circulation time of the oleanolic acid can be prolonged. Meanwhile, targeted delivery of oleanolic acid is realized through a targeted group, the concentration of the drug in tumor tissues is improved, and toxic and side effects on normal tissues are reduced. An MTT method is adopted, the inhibition effect of the oleanolic acid nanoparticles on cell growth is researched, and the result shows that the oleanolic acid targeting nanoparticles have a stronger effect of inhibiting tumor cell proliferation compared with an oleanolic acid raw material medicine.

The application discloses a porous aluminum-based carrier and a preparation method thereof, a CO2 adsorbent and application thereof. The preparation of the porous aluminum-based carrier comprises the following steps: segmental aging: a solution containing pseudo-boehmite is subjected to two-stage aging, the first stage is stirring aging, and the second stage is standing aging, the two kinds of aging modes are combined to improve the crystallinity of the pseudo-boehmite; organic solvent washing and pore expansion: the pseudo-boehmite is filtered out, and is subjected to water washing first and then organic solvent washing; segmental drying: low-temperature air blowing drying and vacuum drying are combined, the drying mode, the drying temperature and the solvent evaporation rate during drying are adjusted to avoid pore shrinkage or collapse caused by excessively high drying temperature and excessively fast solvent evaporation speed. The preparation of the porous aluminum-based carrier is simple in operation and low in energy consumption, and the CO2 adsorbent prepared from the porous aluminum-based carrier and an organic amine has excellent adsorption performance such as high adsorption capacity, fast adsorption rate and high stability.

The invention discloses a high molecular weight poly (p-dioxanone) (PPDO) microsphere as well as a preparation method and application thereof. By adopting a double emulsification-solvent evaporation method, an amphiphilic polymer, such as poly (p-dioxanone) (PDO) or a copolymer of PDO and a hydrophilic fragment (such as mPEG and mPPG), is utilized to perform self-assembly on a two-phase interface formed by emulsification under the combined action of amphipathy and polyvinyl alcohol (PVA) to form a double-micelle protective layer, so that the degradation effect of water on PPDO in the microsphere forming process is effectively blocked, and the PPDO can be effectively degraded. And finally, the high-molecular-weight poly (p-dioxanone) microspheres with stable performance are obtained, so that the high-molecular-weight PPDO microspheres have long-term stability. The preparation method is high in operability, mild in condition and suitable for large-scale production, high-molecular-weight poly (p-dioxanone) microspheres are obtained, and the preparation method has wide application prospects in the aspects of tissue filling agents, drug carriers, tissue scaffolds and the like.

The invention discloses a preparation method and application of a targeted delivery system of a metal polyphenol nano system. The invention discloses a targeted delivery system of a metal polyphenol nano system, and a preparation method of the targeted delivery system comprises the following steps: taking the metal polyphenol nano system formed based on epigallocatechin gallate and iron ions as a carrier, and loading fucoxanthin to prepare fucoxanthin nano particles with active oxygen response characteristics; then, after chondroitin sulfate capable of targeting macrophages and (5-carboxyl amyl) triphenyl phosphorus bromide capable of targeting mitochondria are coupled, the fucoxanthin delivery system with the active oxygen response characteristic and the targeting characteristic is further prepared through a double emulsion anti-solvent evaporation method. The system can realize release of fucoxanthin under stimulation of active oxygen, and realizes aggregation of a targeted delivery system in mitochondria of a specific inflammation site. The carrying system can effectively improve or relieve the inflammatory bowel disease, and the raw materials used in the carrying system are low in cost, the preparation conditions are mild, and large-scale production is easy.

The present invention discloses an accordion-shaped lignin cubic carbon material, a preparation thereof, and an application thereof in a supercapacitor. The preparation method comprises the following steps: firstly, dissolving industrial lignin in an alkali solution and purifying in a weak acid solution; then forming, with a block copolymer, a mixed micelle of the lignin / the block copolymer in a mixed solvent of alcohol and water, then sequentially adding a soluble zinc salt and a soluble oxalate, and carrying out solvent evaporating induction under a neutral condition to co-deposit the mixed micelle and zinc oxalate, with an evaporation rate at the same time, to deposit the mixed micelle of lignin / block copolymer between zinc oxalate layers, to construct a cubic lignin / block copolymer / zinc oxalate complex with ordered structure; and after finally carbonizing, obtaining an accordion-shaped lignin cubic carbon material. This material has a rich ion migration space and is internally provided with interconnected supporting nanosheet layers so that the problem that carbon nanosheets are easy to accumulate is solved, the effective surface utilization rate is improved, and performances of the mass, the area-specific capacitance and the rate capability of a supercapacitor are remarkably improved.

The utility model provides a device suitable for preparing lithium sulfide by a continuous double decomposition method. The device mainly comprises a material stirring reaction kettle, a solvent storage tank, continuous solid-liquid separation equipment, continuous solvent evaporation equipment, a first condensing tower and continuous dynamic vacuum calcination equipment, the device disclosed by the utility model can smoothly realize continuous production and preparation of lithium sulfide, and is simple in operation process and free from harmful gas pollution; in the preparation process, a single solvent is used and the solvent is recycled, so that the preparation method has the advantages of energy conservation and low cost, and cross contamination of multiple solvents is avoided; in addition, during continuous production of lithium sulfide, only one-time high-temperature calcination operation is carried out, and a lithium sulfide product with high purity and small particle size is successfully prepared; the composite cathode material can be directly used for preparing a sulfide solid electrolyte and a lithium-sulfur battery. The method has high industrial application value.

The invention relates to a high-efficiency heat dissipation circuit board and a manufacturing method thereof, and the manufacturing method comprises the steps: constructing a raw material performance database through the structural collection and evaluation of the physical parameters of a high-thermal-conductivity nanofiller and a resin matrix, and guiding the nanofiller to adaptively migrate and locate along the gradient through the adjustment of the partition solvent evaporation rate and the interfacial tension gradient. And an efficient heat-conducting filler network with orderly partitions is formed. Furthermore, in-situ multi-mode detection and automatic feedback optimization are combined, the dispersion uniformity of the filler and the continuity of a heat conduction channel are guaranteed, and the circuit board with uniform heat dissipation performance is prepared through a medium-low temperature step-by-step curing latch structure.

The invention discloses a production method of a sintered neodymium-iron-boron spliced magnet. The method comprises the following steps: processing a magnet to a predetermined size, cleaning and drying; dissolving solid epoxy resin, a solid latent curing agent and an accelerant by using an organic solvent to prepare an impregnating adhesive; gluing the two sides of the glass fiber cloth, and fully volatilizing a solvent to obtain pre-impregnated glass fiber cloth; after being cut, the magnetic blocks are inserted between the to-be-spliced magnets; and after being clamped by a clamp, the insulating adhesive layer is heated and cured to form a compact and pore-free insulating adhesive layer. According to the invention, air holes of the adhesive layer are thoroughly eliminated through a prepreg process, the formed insulating adhesive layer has excellent dielectric strength and insulativity, adjacent magnets can be effectively isolated, an eddy current channel can be effectively cut off, the eddy current heating problem in high-frequency application is remarkably reduced, and meanwhile, high strength and high reliability of the spliced magnet are ensured. The method is particularly suitable for the fields of motors and the like needing to reduce eddy-current loss.

The invention relates to the technical field of drug-loaded microparticles, in particular to a preparation method and application of medical stone / PLGA composite drug-loaded microparticles, medical stone and PLGA are prepared into a structure with activated nano medical stone as a core and a PLGA polymer as a shell through the processes of ball milling, acid activation, emulsification, solvent volatilization and the like, and the medical stone and the PLGA are synergistically matched, so that the drug-loaded microparticles have the advantages that the drug-loaded microparticles are uniform in particle size distribution, and the drug-loaded microparticles have good drug-loaded performance. Firstly, the hydrogel has intelligent responsiveness, can accelerate degradation in alkaline and enzyme environments of wound surfaces, and realizes accurate release of drugs as required; secondly, the long-acting controlled release property is shown, and a dual sustained release barrier is constructed through medical stone adsorption and PLGA wrapping, so that the medicine is released for more than 72 hours at a constant speed following zero-order dynamics, and burst release is effectively avoided. And thirdly, when the drug-loaded particles are used for hydrogel, the drug-loaded particles in nanoscale are combined with the hydration effect of a hydrogel matrix, so that the efficient permeability of the drug in the cuticle is greatly improved.

The invention relates to the technical field of material analysis, in particular to a rare earth element online detection device and method based on laser-induced breakdown spectroscopy. According to the invention, the laminar flow lining plate is arranged, and the to-be-detected liquid is conveyed to the laminar flow lining plate through the liquid conveying device, so that the laminar flow of the to-be-detected liquid is formed on the laminar flow lining plate. Then, an LIBS signal of the to-be-detected liquid laminar flow is collected through an LIBS signal collection device, and the to-be-detected liquid laminar flow can reduce laser energy consumed by solvent evaporation, so that the signal intensity is improved; and the to-be-detected liquid laminar flow can also reduce the fluctuation of the liquid level, so that the signal stability is improved. In addition, the acoustic signal of the liquid laminar flow to be detected is acquired through the acoustic signal acquisition device, and the LIBS signal and the acoustic signal are jointly analyzed, so that the accuracy of rare earth element detection can be improved.

The invention relates to SiBCN aerogel as well as a normal-pressure drying preparation method and application thereof, and belongs to the technical field of functional ceramic aerogel. In order to solve the problems of high equipment requirement, high cost and large energy consumption of the existing SiBCN aerogel preparation method, the invention provides a normal-pressure drying preparation method of SiBCN aerogel, which comprises the steps of precursor solution preparation, hydrothermal crosslinking reaction, solvent replacement, normal-pressure drying and high-temperature ceramization heat treatment. Through step-by-step solvent replacement and normal-temperature and normal-pressure drying treatment, the destructive effect of capillary force on a gel skeleton in the solvent evaporation process is effectively weakened, and the integrity of the gel skeleton can be guaranteed. The method can be implemented only under common room-temperature and normal-pressure conditions, and the preparation process is simple, convenient, efficient and easy to accurately control. The preparation method disclosed by the invention is low in energy consumption and low in preparation cost, meets actual production requirements, is suitable for large-scale production, and provides a technical basis for popularization and application of the SiBCN aerogel.

The invention relates to a preparation method of a biological membrane with a bionic cuticle'brick-slurry 'structure and a wound dressing application of the biological membrane, and belongs to the technical field of biological auxiliary materials. The preparation method comprises the following steps: dispersing prepared wool keratin microspheres in a fibroin solution, realizing a stable and firm brick-slurry structure by combining solvent volatilization with a photo-crosslinking technology, further crosslinking by utilizing metal ion coordination, and simultaneously endowing the dressing with the capabilities of effectively blocking bacterial permeation and sterilizing. The biological membrane exceeds the design of traditional layered wound dressings, and accurate reproduction of a natural skin structure is preferentially considered. The microspheres are assembled into a densely-arranged masonry structure material in a planned manner, so that the dressing has high moisture permeability, oxygen permeability and strong antibacterial barrier capacity, can promote repair of infectious wounds and burn and scald wounds, and has remarkable clinical application value.

The invention relates to the technical field of barium titanate production and preparation, in particular to a barium titanate spherical powder production method. The preparation method comprises the following steps: preparing and atomizing a precursor solution, then spraying the atomized precursor solution into a high-temperature reaction furnace for flame melt crystallization, and then carrying out gradient cooling and spherical curing in a cooling area of the high-temperature reaction furnace, and finally, grading and collecting the prepared spherical barium titanate powder through a collecting system to obtain spherical barium titanate powder with uniform particle size, and carrying out surface functionalization treatment on the collected spherical barium titanate powder through a coating unit to obtain surface-coated spherical barium titanate powder. The precursor solution is subjected to solvent evaporation, thermal decomposition and flame melting in a high-temperature reaction furnace to form barium titanate crystal nucleuses, the crystal nucleuses naturally shrink to form balls under the driving of surface tension, the defect of mechanical damage of a traditional solid phase method or the defect of agglomeration of a liquid phase method is overcome, the crystal defects of the crystal nucleuses are reduced, and meanwhile particle size distribution is more uniform.

The invention discloses a preparation method and application of a perovskite layer of a perovskite solar cell, and relates to the technical field of perovskite cells. The preparation method comprises the following steps: dissolving a perovskite material in an organic solvent to prepare a precursor solution; and performing slit coating on a substrate by using the precursor solution, and obtaining the perovskite layer after annealing, wherein the annealing atmosphere comprises organic salt steam and nitrogen. According to the preparation method disclosed by the invention, the defects of uneven film thickness, disordered solvent volatilization and many film surface cracks when the perovskite layer is prepared by slit coating are overcome through a special annealing process, the problem that the slit coating technology and the annealing process are incompatible in the traditional technology is solved, large-scale preparation of high-quality and low-defect film layers is realized, and the preparation method is suitable for industrial production. The method is suitable for large-scale production of efficient and stable perovskite solar cells.

The invention discloses lithium borohydride and a preparation method thereof, and belongs to the technical field of hydrogen storage material preparation. The preparation method provided by the invention comprises the following steps: in a hydrogen atmosphere of 50bar, mixing lithium hydride, triethylamine borane and an organic solvent, and performing mechanical ball milling to obtain a mixture; and evaporating the solvent in the mixture, and carrying out heat treatment to obtain the lithium borohydride. Lithium borohydride is prepared through mechanical ball milling, the preparation process is high in safety coefficient, low in energy consumption, simple in process, mild in condition, adjustable in reaction process and easy to implement; the optimal yield is 80%, and the method is originally superior to other similar processes, has technical conditions for efficient mass production, and has a wide application prospect in hydrogen storage materials.

The invention provides a sodium ion specific fluorescence labeled transparent soil sample as well as a preparation method and application thereof, and belongs to the technical field of rock soil and geological engineering. The method comprises the following steps: firstly, sequentially carrying out hydrophilization treatment, solvent evaporation and dissolution on a sodion combined benzofuran isophthalate probe to obtain a probe mother solution; mixing the probe mother solution, a buffer solution, an inorganic sodium salt solution and a solvent to prepare a fluorescence labeling pore solution; and finally, mixing the sodium polyacrylate particles and the fluorescence labeled pore liquid, and performing vacuum saturation treatment to obtain the transparent soil sample. The transparent soil sample provided by the invention still keeps excellent optical transparency while having sodium ion specific response capability, so that a stable and reliable experimental medium is provided for in-situ, real-time and full-field observation of sodium ion migration.

The application belongs to the technical field of lithium ion battery materials, and discloses a kind of cationic surfactant coated modified lithium-rich manganese-based positive electrode material and its preparation method, first, cationic surfactant ethanol solution is prepared by dissolution, and lithium-rich manganese-based positive electrode material is dispersed in ethanol to prepare lithium-rich manganese-based positive electrode material dispersion liquid;Then the cationic surfactant ethanol solution is added to the lithium-rich manganese-based positive electrode material at a constant speed, and the mixture is fully mixed to obtain a mixed solution;Finally, the mixed solution is treated by water bath heating solvent evaporation, and the cationic surfactant coated modified lithium-rich manganese-based positive electrode material is obtained by low-temperature heat treatment.The application process is simple and easy to operate;The prepared lithium-rich manganese-based positive electrode material coating layer grows uniformly, and the composite effect is good.By coating the cationic surfactant on the lithium-rich manganese-based material, the surface side reaction caused by the contact between the material and the electrolyte is greatly reduced, thereby improving the cycle stability of the material in the electrochemical process.

The invention discloses a compound fluralana external preparation for dogs, a preparation method and application, belongs to the technical field of veterinary drugs, and solves the problems that an existing preparation is poor in skin surface permeability, a solvent is easy to volatilize, and use experience and drug effect exertion are influenced. The preparation is prepared from the following raw materials: fluralana, moxidectin, ethyl butylacetamidopropionate and N, N-dimethylformamide. The preparation method comprises the following steps: adding N, N-dimethylacetamide, acetone, an auxiliary adjuvant, a transdermal penetration enhancer, an antioxidant and a surface film-forming agent; according to the invention, the combination of the fluralab and the moxidectin can play a synergistic effect and expand an anti-parasitic spectrum so as to achieve an internal and external driving effect; both the fluralab and the moxidectin belong to high-fat-soluble substances, parasites can be quickly repelled and killed by adding novel adjuvant natural parasite expelling ingredients, and meanwhile, the skin permeability can be improved by adding the efficient transdermal penetration enhancer, and the risk that medicine residues are licked by pets is reduced.

The invention provides a POCD treatment medicine composition with dendrobine delivered by a nano-carrier and application, and belongs to the technical field of medicine. The composition consists of dendrobine, a nano-carrier material and a stabilizer, wherein a nano-carrier is PLGA (poly (lactic-co-glycolic acid)) nanoparticles or lipidosome. The particle size of the composition is 50-150nm, the polydispersity index is less than 0.3, and the loading capacity of dendrobine is 5-15%. The invention also provides two preparation methods of the composition. The PLGA nanoparticles are prepared by adopting an emulsification-solvent evaporation method; the liposome is prepared by adopting a film hydration-ultrasonic extrusion method, and each process parameter is specifically limited. The pharmaceutical composition can significantly improve the brain targeting and bioavailability of dendrobine, and can be used for preparing drugs for preventing or treating postoperative cognitive impairment (POCD), and the administration route can be intravenous injection or nasal administration.

The present invention relates to a zinc negative electrode with a stress-responsive interface modification layer, a preparation method thereof, and a zinc-ion battery, belonging to the technical field of zinc negative electrode interface modification for aqueous zinc-ion batteries. The thickness of the interface modification layer is 0.1 μm to 20 μm, and it is uniformly distributed on the surface of the zinc negative electrode; the material of the interface modification layer is polyborosiloxane with shear thickening characteristics. The interface modification layer has good conductivity and stress response characteristics, can effectively inhibit the growth of zinc dendrites, optimizes the zinc ion deposition behavior at the interface of the metal zinc negative electrode, and helps to improve the cycle stability of the aqueous zinc-ion battery; the present invention also provides a preparation method of a zinc negative electrode with a stress-responsive interface modification layer, which uniformly forms a stress-responsive interface modification layer on the surface of the metal zinc negative electrode by a solvent evaporation method to protect the metal zinc negative electrode and effectively inhibit the growth of zinc dendrites; the aqueous zinc-ion battery is a button battery or a soft-pack battery.

The invention discloses a preparation method of an organic-inorganic composite microcapsule as well as an obtained product and application of the organic-inorganic composite microcapsule. The preparation method comprises the following steps: firstly, preparing a MoS2-metal composite material by adopting pulse laser irradiation, mixing the MoS2-metal composite material, PAO5 oil, polysulfone and an organic solvent to obtain an organic phase, and dissolving lauryl sodium sulfate and polyvinyl alcohol in water to obtain a water phase; and mixing the organic phase and the water phase, and obtaining the microcapsule by adopting a solvent evaporation method. The method disclosed by the invention is simple to operate and low in cost, and the obtained microcapsule can automatically store a lubricant and has excellent tribological performance in the friction process.

The application belongs to the field of super-wetting material manufacturing, and discloses a preparation method of micro-nano hierarchical super-hydrophobic coating. The coating comprises a hydrophobic nanoparticle solution and a microstructure construction solution. The hydrophobic nanoparticle solution comprises ethanol, water, 25wt.% concentrated ammonia, tetraethyl silicate and hexadecyl trimethoxysilane, and the volume ratio is 18-22:1-2:1.8-3.3:0.8-2.0:0.3-0.7. The microstructure construction solution comprises dichloromethane, polydimethylsiloxane, polystyrene and a curing agent, and the mass ratio is 20-30:1.8-3.0:0.5-0.8:0.18-0.3. The application adopts a solvent evaporation phase separation method to construct the microstructure. The preparation and modification process of the nanoparticle solution is carried out in series in a single reaction container. Alkyl siloxane is used instead of highly toxic perfluorosiloxane. The method has a simple manufacturing process, low cost and is suitable for large-area spraying applications.

The invention relates to the technical field of biomedical materials, and discloses an active composite membrane with an asymmetric double-layer structure as well as a preparation method and application of the active composite membrane. The active composite membrane with the asymmetric double-layer structure is prepared from the following preparation raw materials in percentage by mass: 95 to 98 percent of chitosan; 0.5%-2% of a plant polyphenol cross-linking agent; and 1%-4% of magnesium-based degradable inorganic filler. The active composite membrane has an integrated double-layer structure without interface bonding, the compact layer can effectively block soft tissues, and the porous layer is beneficial to cell adhesion and nutrition delivery; in a wet state, the material is excellent in mechanical property, controllable in degradation and high in cell safety, can effectively inhibit bacteria and promote osteoblast proliferation and differentiation, and can meet the performance requirements of bone defect repair on the material; the preparation method adopts the steps of solvent volatilization, freeze drying and precooled alkaline alcohol solution washing for preparation, the whole preparation process is carried out in a water phase, the conditions are mild, the steps are simple, complex equipment is not needed, and extremely high clinical transformation and industrialization potential is shown.

The invention relates to the technical field of lithium ion battery manufacturing, and discloses a preparation method of a silicon-containing silicon oxide-phenolic resin-artificial graphite composite negative electrode material, which comprises the following steps: grafting phytic acid on the surface of silicon-containing silicon oxide to construct a protonated acidic site, mixing modified silicon-containing silicon oxide, phenolic resin and artificial graphite, and keeping at a constant temperature to obtain the silicon-containing silicon oxide-phenolic resin-artificial graphite composite negative electrode material. Preferentially carrying out pre-polycondensation by utilizing phytic acid catalysis interface resin to form a gel layer, and rapidly removing a solvent to obtain a precursor; according to the preparation method disclosed by the invention, interface chemical anchoring is established before solvent volatilization by utilizing a dynamic competitive mechanism, so that the problem of stripping of resin and active particles caused by solvent volatilization in a traditional process is solved, and the structural stability and the electric conduction continuity of the material in a battery circulation process are improved.

The invention belongs to the technical field of gas separation membranes, and discloses a novel polymer blended carbon molecular sieve membrane for butadiene / butane separation and a preparation method thereof. The polymer blended carbon molecular sieve membrane is prepared by an improved method which comprises the following steps: firstly, introducing a fluorenyl structure into polyimide to prepare high-carbon-content and high-rigidity copolyimide so as to prevent serious pore channel collapse in a carbonization process, and then blending with a polymer with good pore-forming capability according to a certain proportion. The obtained polymer is blended to prepare a flat and uniform flat sheet membrane through a solvent evaporation method, and the flat sheet membrane is carbonized through an improved pyrolysis procedure, so that the prepared carbon molecular sieve membrane has a micropore-ultramicropore structure with uniform size distribution and good mechanical properties; the catalyst shows excellent gas separation performance in butadiene / n-butane, butadiene / iso-butane and other systems, and can effectively solve the industrial problem of high energy consumption of C4 fraction separation.

The invention provides a method and equipment for mixing powder. The method comprises the following steps: pretreating a material and introducing a liquid phase; dynamically shearing and dispersing; gradient heating and solvent evaporation; performing high-speed shearing to trigger fibrosis; the fiber structure is optimized through low-speed kneading; crushing the fiberized material; according to the method, a low-boiling-point solvent is introduced in the powder dry mixing process through a liquid-phase-assisted dry mixing-low-temperature solvent recovery-controllable fibration synergistic process, the powder mixing efficiency and uniformity are improved through a liquid phase, and after powder is mixed uniformly, condensate water of a stirring tank is closed, so that the temperature of a slurry intermediate semi-finished product is increased; and the stirring tank is synchronously vacuumized, so that the low-boiling-point solvent is boiled, low-boiling-point solvent steam is pumped into the condensation system, and the low-boiling-point solvent is recycled, so that uniformly mixed dry powder is obtained.

The application provides an In-MOF crystal material and a preparation method and application thereof, and the molecular formula of the In-MOF crystal material is [In(phen)(BDC) 1.5 ]·H2O, wherein phen is 1,10-phenanthroline, and BDC is terephthalic acid ligand; the crystal belongs to a monoclinic crystal system P2 1 / n with a space group, and the cell parameters are alpha=90°, beta=97.774(2)°, gamma=90°, a=12.3359(3)Å, b=14.1993(4)Å, c=15.4995(4)Å, the cell volume is 2689.96(12)Å 3 , and Z=4. The application synthesizes an In-MOF crystal material by using a simple room temperature solvent evaporation method, and the In-MOF crystal material can be used as a catalyst for electrocatalytic carbon dioxide reduction, and realizes efficient carbon dioxide reduction to form formic acid.

According to the friction nanometer generator sensor and the preparation method thereof, high dielectric particles and reinforced fibers are added into the friction dielectric layer of the friction nanometer generator sensor, so that the charge storage performance, the conduction efficiency, the fatigue resistance and the durability of the friction nanometer generator sensor are improved. Besides, in the preparation process, solvent evaporation is adopted to induce the surface of the friction dielectric layer to form a fluff microstructure, the contact area between the friction dielectric layer and the vibration disc can be remarkably increased through the microstructure, and the triboelectrification efficiency is improved.