1821 results about "Polymer solution" patented technology

The invention belongs to the technical field of hydrophilic gel and water extraction from air, and particularly relates to surface-hydrophobic core-shell structure composite moisture absorption hydrogel and a preparation method and application thereof.The preparation method specifically comprises the steps that hydrophilic gel loaded with moisture absorption salt is placed in a hydrophobic polymer solution, and a phase inversion method is used for preparing the core-shell structure composite moisture absorption hydrogel; a porous hydrophobic polymer shell layer is loaded on the surface of the hydrophilic gel, so that the composite moisture absorption hydrogel with the moisture absorption salt loaded hydrophilic gel as a core layer and the porous hydrophobic polymer as the shell layer is obtained, and the prepared composite moisture absorption hydrogel can prevent leakage of the moisture absorption salt and is high in water absorption performance, good in long-term use stability and simple in preparation method. The prepared composite moisture absorption hydrogel can be widely applied to the fields of air water taking, humidity control and agricultural moisturizing.

The invention relates to the technical field of battery diaphragms, in particular to a composite coating diaphragm for a lithium ion battery and a preparation method of the composite coating diaphragm, and the preparation method comprises the following steps: coating aramid polymer slurry on a base membrane, and carrying out coagulating bath forming and drying treatment to obtain an aramid coating diaphragm intermediate; the aramid polymer slurry comprises a cross-linked structure aramid polymer solution, a pore-foaming agent and a cosolvent; the weight-average molecular weight of a cross-linked structure aramid polymer in the cross-linked structure aramid polymer solution is 15-30 W; and coating the surface of the aramid fiber coated diaphragm intermediate with a TiO2 treatment solution, and finally performing drying treatment to obtain the composite coated diaphragm. The TiO2 treating fluid is prepared from TiO2 sol and a water-based adhesive. The composite coating diaphragm has higher heat resistance, diaphragm rupture temperature, puncture strength and low water absorption performance; and after the battery is assembled, the battery shows better electrochemical and safety performance.

The invention discloses a porous substrate reinforced anion exchange membrane and a preparation method and application thereof, and relates to the technical field of anion exchange membranes. The porous substrate reinforced anion exchange membrane is prepared by the following steps: uniformly mixing a polyarylene alkylene type cationic polymer solution and a C1-C10 alcohol solvent, then coating two sides of a porous substrate with the mixture, and drying to obtain the porous substrate reinforced anion exchange membrane. And removing the solvent to obtain the product. According to the method, the porous substrate can be well infiltrated by the cationic polymer solution without pre-treating the porous substrate, so that the porous substrate reinforced anion exchange membrane with a sandwich-like structure is obtained. The film has outstanding swelling resistance and excellent mechanical properties, has good electrochemical properties, and has good application prospects in alkaline film energy conversion devices.

The invention relates to the technical field of heat-conducting graphite materials, in particular to a POD precursor film, a POD-based graphite film and a preparation method of the POD precursor film, the POD-based graphite film and the preparation method of the POD precursor film. After the reaction is finished, obtaining an antioxidant modified aromatic polyoxadiazole polymer solution; the preparation method comprises the following steps: coating an antioxidant modified aromatic polyoxadiazole polymer solution with a wiped film, then carrying out solidification forming in a multi-stage coagulation bath, and finally neutralizing, washing and drying to obtain a POD precursor film; the coagulating bath is an aqueous solution of sulfuric acid and boron compounds and an aqueous solution of sulfuric acid. And carrying out carbonization treatment and graphitization treatment on the POD precursor film to obtain the POD-based graphite film. According to the preparation method, the boron element is cooperatively introduced into and out of the POD precursor film, so that the oxidation resistance of the graphite film is remarkably improved while the high thermal conductivity is maintained.

The invention provides super-strong barrier packaging paper and a preparation method thereof, relates to the field of high-barrier packaging paper, and aims to solve the problems that the barrier property of a traditional packaging material is reduced and the mechanical property is insufficient in a high-humidity environment. The packaging paper is composed of a coating barrier layer, a transparent film layer and a body paper base layer, and is prepared through a special process, so that the transmittance of oxygen and water vapor is remarkably reduced, and the shelf life of packaged contents is effectively prolonged. The preparation method comprises the following steps: mixing wood pulp fibers with a citric acid hydration solution, adding materials such as cationic starch to form fiber slurry, and drying to obtain the raw paper base layer; mixing and extruding acrylonitrile copolymer and other materials to form a transparent film layer; materials such as lignin and a citric acid hydration solution are mixed to form cross-linked slurry, the cross-linked slurry is mixed with a polymer solution to obtain a cross-linked coating, the raw paper base layer is coated with the cross-linked coating, the cross-linked coating is dried and then compounded with the transparent film layer, and the packaging paper has excellent barrier performance and mechanical performance and is particularly suitable for being used in areas with large temperature and humidity changes.

The invention discloses a method for improving the performance of a resistance reducing agent based on cyclodextrin solubilization modification and application, and belongs to the technical field of fracturing fluids. The method comprises the following steps: S1, preparing a mixed liquid from hydrophobic associated polymer dry powder and cyclodextrin; s2, stirring the mixed liquid, testing the particle size of the mixed liquid at the same time interval, and ending stirring after the particle size is reduced to a stable size, so as to obtain the hydrophobic associated polymer solution. The cyclodextrin polymer not only has a high-molecular effect, but also retains the inclusion ability of a cyclodextrin cavity, and has better inclusion performance under the condition of larger guest molecules. The hydrophobic association polymer is modified through a host-guest inclusion technology, the solubility of the hydrophobic association polymer is improved on the basis of guaranteeing the resistance reducing effect of the hydrophobic association polymer, and the prepared hydrophobic association polymer resistance reducing agent has the advantages of being fast in dissolution and good in shear resistance and resistance reducing effect.

The invention belongs to the technical field of paint coatings, and particularly relates to a hydrophobic heat-conducting self-repairing coating and a preparation method thereof. The preparation method of the hydrophobic heat-conducting self-repairing coating comprises the following steps: ultrasonically dispersing a heat-conducting filler and polyethylene glycol in an organic solvent, dropwise adding into a water-borne epoxy resin solution, and stirring to obtain a heat-conducting coating solution; the method comprises the following steps: dropwise adding a liquid A containing polysiloxane and a fluorine-containing monomer into a liquid B containing polyethylene glycol, stirring, carrying out centrifugal suction filtration, and drying to obtain the self-repairing microcapsule. Then adding the self-repairing microcapsules and silicon dioxide into the fluorine-containing polymer solution and / or the hydrophobic resin solution, and carrying out ultrasonic dispersion to prepare a self-repairing hydrophobic coating solution; the heat-conducting coating liquid and the self-repairing hydrophobic coating liquid are uniformly sprayed or spin-coated on the surface of a metal base material in sequence and then are subjected to UV curing, and the hydrophobic heat-conducting self-repairing coating is prepared. According to the method, the process and raw materials are simple, and the prepared coating has heat conduction and self-repairing performance and is excellent in anti-aging performance.

The present application discloses a continuous dynamic and efficient devolatilization method for a polymer / volatile system based on high mass transfer interfaces, including the following steps: providing a dynamic single-screw devolatilizer, feeding a polymer solution to the devolatilizer, wherein the polymer solution includes polymer and volatile substances with small molecule weight, and the volatile substances include organic solvents, residual monomers, water or reaction by-products; conveying and compressing polymer materials by the screw downstream a devolatilization section, and extruding the polymer materials out of the dynamic single-screw devolatilizer directly; or providing a side-feeding extruder downstream of the devolatilization section and feeding plastic additives into a devolatilized polymer melt, and then melt blending the plastic additives with the devolatilized polymer melt at an end of the dynamic single-screw devolatilizer before exiting the dynamic single-screw devolatilizer.

Provided is a production method for water-absorbing resin particles containing a crosslinked polymer, the production method comprising: a preparation step for preparing a polymer solution containing a solvent and a polymer having a weight-average molecular weight of at least 300,000; and a crosslinking step for crosslinking the polymer. This absorber contains water-absorbing resin particles obtained by said production method. This absorbent article includes said absorber.

The invention belongs to the technical field of water-soluble polymer synthesis and drilling fluid application, and relates to a salt-resistant and high-temperature-resistant polymer micro-manganese dispersing agent as well as a preparation method and application thereof. The invention relates to a preparation method of a salt-resistant and high-temperature-resistant polymer micro-manganese dispersant. The preparation method comprises the following steps: dissolving a carboxylic acid-containing monomer and a sulfonic acid-containing monomer in deionized water; dropwise adding a first functional monomer and a second functional monomer, and then adjusting the pH to be neutral to obtain a mixed solution; introducing nitrogen and heating, adding an initiator aqueous solution after the mixed solution is heated to a preset temperature, and obtaining a polymer solution after the reaction is finished; and dropwise adding the polymer solution into a mixed solution of ethanol and acetone, and filtering to obtain the salt-resistant and high-temperature-resistant polymer micro-manganese dispersing agent. The salt-resistant and high-temperature-resistant polymer micro-manganese dispersing agent is small in dosage and good in effect, when 40% potassium formate water and the micro-manganese content are 36%, only 0.2 wt% of the dispersing agent is used, hot rolling can be conducted for 16 h at the temperature of 210 DEG C, and the viscosity reduction effect is kept to be 40% or above.

The invention relates to the technical field of lithium battery diaphragms, and discloses a water-soluble gel electrolyte, a preparation method thereof, water-based slurry and application. The preparation method of the water-soluble gel electrolyte comprises the following steps: in the presence of an initiator, carrying out first polymerization reaction on methyl methacrylate and N-isopropylacrylamide to obtain an intermediate I; carrying out second polymerization reaction on the polymer solution A and the polymer solution B to obtain an intermediate I; the polymer solution A contains an intermediate I with the concentration of 8-12wt%; the polymer solution B contains neopentyl glycol diglycidyl ether with the concentration of 0.5 to 1.2 weight percent; and carrying out heating treatment on the intermediate I to obtain the water-soluble gel electrolyte. When the water-soluble gel electrolyte is applied to the battery diaphragm, the addition amount of the electrolyte can be reduced during electrolyte injection in a battery cell, and the cost is effectively reduced; battery leakage is reduced, and the safety performance of the battery cell is improved; and the internal resistance can be reduced, and the cycle performance of the battery cell can be improved.

The invention relates to the technical field of oil and gas field exploitation, and discloses a drag reducer for a multifunctional fracturing fluid and a preparation method thereof.The preparation method of the drag reducer for the multifunctional fracturing fluid comprises the steps that acrylic acid, acrylamide, 2-acrylamido-2-methylpropanesulfonic acid and modified itaconic acid are added into deionized water, stirring and mixing are conducted, and the drag reducer for the multifunctional fracturing fluid is obtained. Nitrogen is introduced for 30-40 min to remove oxygen, then azobis (isobutylamidine) hydrochloride is added, the mixture is stirred to react for 48-72 h at the temperature of 45-50 DEG C, and a polymer solution is obtained; and directly and uniformly mixing the polymer solution, the compatilizer and the modified nano silicon dioxide, and reacting in a magnetic stirrer at 60-70 DEG C for 1.5-2 hours to obtain the drag reducer for the multifunctional fracturing fluid. The drag reducer has a good drag reduction effect, and the hydrophobicity, the temperature resistance, the salt resistance and the shear resistance are improved.

The invention relates to the technical field of dielectric material preparation, in particular to a semi-aromatic polyimide dielectric film and a preparation method thereof. The preparation method of the semi-aromatic polyimide dielectric film comprises the following steps: mixing an aliphatic dianhydride monomer, a rigid diamine monomer containing a side ethyl group and a solvent, carrying out a copolymerization reaction to obtain a pre-polymer solution, forming a film from the pre-polymer solution, and carrying out an imidization reaction to obtain the semi-aromatic polyimide dielectric film, wherein the imidization reaction comprises a first heat preservation stage, a second heat preservation stage and a third heat preservation stage. The cross-linking density is improved by introducing an ethyl side chain into a semi-aromatic polyimide structure, meanwhile, a short-range ordered structure is controlled by adopting a specific imidization process, the structure of the obtained dielectric film is controlled from the molecular level, and the high-temperature energy storage performance of the dielectric film is remarkably improved.

The invention belongs to the field of pharmaceutical preparations, and relates to a brexpiprazole long-acting microsphere and a preparation method thereof, and the preparation method comprises the following steps: (1) dissolving brexpiprazole and a degradable polymer in an organic solvent to obtain a drug-containing polymer solution as an oil phase; (2) mixing the drug-containing polymer solution with a polyvinyl alcohol solution through a microfluidic technology to obtain an oil-in-water emulsion; and (3) under a stirring condition, carrying out curing, washing and freeze drying on the oil-in-water type emulsion to obtain the brexpiprazole long-acting microspheres. By adjusting the volatilization stirring time when the O / W primary emulsion is formed, the final in-vitro release rate of the microspheres is adjusted, and the microspheres which are free of burst release and hysteresis period and are slowly released can be screened out. The brexpiprazole long-acting microsphere provided by the invention is simple in preparation process, easy to industrially amplify, high in encapsulation efficiency, large in drug loading capacity, uniform in microsphere particle size distribution, round in shape, good in flowability and good in needle passing property, is easier to inject, has an obvious slow release effect, and can be used for reducing the fluctuation of blood concentration and effectively improving the compliance of psychiatric patients.

The invention discloses an unattended tertiary oil recovery injection allocation system. A produced water treatment module receives oil well produced water, treats the oil well produced water and then provides softened water for a system; the dry powder dispersing, dissolving and curing module is used for mixing polymer dry powder with softened water treated by the produced water treatment module to form a polymer mother solution and curing the polymer mother solution; the liquid medicament storage and feeding module is used for storing, preparing and accurately adding liquid medicaments such as surfactants and bactericides; the mother liquor feeding and watering module conveys the polymer mother liquor to the injection module at a constant pressure, and meanwhile, softened water and a surfactant target solution in a set proportion are doped; the injection module mixes a polymer solution, water and an agent provided by the mother liquor feeding and watering module and then injects the mixture into the stratum at constant pressure; and the monitoring communication module controls the injection allocation system through the PLC. The system has the beneficial effects that the whole production process is automatically operated under the scheduling of the monitoring communication module, the operation state of corresponding equipment can be timely adjusted in case of special situations, the management efficiency is improved, and the maintenance cost is reduced.

The present disclosure pertains to methods for enhancing the properties of conventional Li / Al-LDH by integrating polymers to provide compositions comprising a Li / Al-LDH material and a polymer. The present disclosure further pertains to methods of using such polymer-modified-LDH to improve lithium adsorption and extraction performance. The disclosed methods can comprise incorporating the polymer during the precipitation reaction or by mixing the Li / Al-LDH product with a polymer solution under specific conditions. During the lithium extraction process, the disclosed compositions comprising a Li / Al-LDH material and a polymer can be used as an excellent lithium adsorbent to capture lithium ions from low-concentration lithium resources due to its improved physicochemical properties. The disclosed compositions comprising a Li / Al-LDH material and a polymer provides compositions for lithium extraction from low concentration resources, as well as expands the scope of lithium adsorbent material development.

The invention discloses a preparation method of a low-salt-permeability bipolar membrane, and belongs to the field of bipolar membrane preparation, aiming at the inherent characteristic that in a tape casting process, an anion membrane layer is difficult to form a cross-linked structure, the high selectivity of the anion membrane layer and a good middle interface layer formed by an anion membrane layer and an anion membrane layer are separately designed, and after the surface of an cation membrane layer is coated with a water dissociation catalyst, the cation membrane layer is separated from the anion membrane layer. Coating a negative film polymer solution to form a relatively thin negative film layer, then attaching a high-selectivity negative film, and fixing all the film layers together by using a hot melting process to form a whole body; the first anion membrane layer is a thin anion membrane layer formed by coating, the key point of the design is that the bipolar membrane is low in water dissociation voltage, the second anion membrane layer is a high-selectivity anion membrane layer, and the membrane layer ensures low salt permeation of the bipolar membrane; the positive membrane layer, the first negative membrane layer and the second negative membrane layer are all designed to be fused together through a hot melting process, and the prepared bipolar membrane has low salt permeability and low water dissociation voltage.

The invention relates to a method for calculating molecular weight of a biological macromolecular material based on an AI algorithm. Part of biopolymer materials are difficult to form monomolecular chains after being dissolved into an aqueous solution, the ionic liquid is selected as a dissolution system, the monomolecular chains can be well formed after the macromolecular materials are dissolved, and then rheological data after biomacromolecules are dissolved in the ionic liquid are tested by using a rheological method. According to the method, a Rouse model is selected as a polymer solution model, and key parameter values are obtained by measuring a large amount of data, training the model by using an AI algorithm and carrying out nonlinear fitting, so that the molecular weight value of the measured material is calculated. The calculation method has the characteristics of accuracy and rapidness, and can be well popularized to the field of computer research of high polymer materials.

The invention discloses a method for predicting color change of an ultra-wide color gamut conjugated polymer microsphere. The method comprises the following steps: collecting solution mass ratio data of previous three-primary color polymer solutions; obtaining annealing condition data corresponding to the solution mass ratio data; acquiring color change data of the conjugated polymer microspheres under the annealing condition data; taking the data as sample data to train a neural network model to form a color change prediction model; new solution mass ratio data and annealing condition data are used as target data to be input into a color change prediction model for prediction; and through a black body radiation RGB conversion formula, converting new color temperature data and brightness data output by the prediction color change model into three-primary color values, and completing prediction. Through the method, the prediction model can rapidly predict the color temperature and the brightness of the conjugated polymer microspheres, and industrial personnel can rapidly prepare a conjugated polymer material of which the color and the brightness are adaptive to the specific industrial application field according to new target data and prediction results.

The invention relates to a composite alkaline ionic membrane as well as a preparation method and application thereof. The composite alkaline ionic membrane is obtained by carrying out anion exchange on a composite membrane consisting of a quaternized anion exchange membrane type polymer and an ion solvated polymer nanofiber membrane, the quaternized anion exchange membrane type polymer is distributed on the surface and in pores of the ion solvated polymer nanofiber membrane, and the quaternized anion exchange membrane type polymer and the ion solvated polymer nanofiber membrane are combined through a covalent bond; the preparation method comprises the following steps: coating the surface of an ion solvated polymer nanofiber membrane with an anion exchange membrane type polymer solution, filling pores in the membrane with the anion exchange membrane type polymer solution, and then sequentially carrying out a cross-linking reaction, a quaternization reaction and an anion exchange reaction to prepare the composite alkaline ionic membrane; the alkaline ionic membrane is applied to alkaline electrolysis of water for hydrogen production, alkaline fuel cells, carbon dioxide conversion or electrochemical synthesis of ammonia. The composite alkaline ionic membrane disclosed by the invention has excellent ionic conductivity and mechanical strength; the preparation method is simple and feasible; the application range is wide.

The invention discloses a method for constructing a multicellular living body material by adopting a droplet bioreactor, which belongs to the crossing field of biological materials and microbial engineering, and comprises the following steps: (1) resuspending different cells in different polymer solutions to prepare degradable or phase-separable hydrogel particles containing cells; (2) dispersing the hydrogel particles in a cross-linkable hydrogel matrix to form a composite hydrogel; and (3) curing the composite hydrogel, and then carrying out degradation treatment to obtain the liquid cavity structure multicellular system bioreactor with spatial partition and dynamic interaction characteristics. According to the invention, ordered distribution and metabolism synergy of different microorganisms in space can be realized, controllable degradability and excellent mass transfer performance are realized, bacterial slow release and metabolite exchange can be maintained, and the method is suitable for long-term stable operation of a continuous flow reactor. The method has wide application prospects in the fields of green biological manufacturing, renewable energy source production, environmental restoration, biomedical engineering and the like.

Disclosed herein is a pressurized therapeutic composition configured to be stored in a valved container designed to maintain an inverse thermosensitive polymer foam composition under pressure and dispense the composition upon opening the valve thereof. After the composition is dispensed from the container the evaporation of an expanding component (e.g., compressed gas or volatile liquid) can cause the inverse thermosensitive polymer solution to foam. The reduced pressure produced from dispensing the inverse thermosensitive polymer solution can reduce its temperature so as to facilitate distribution in a more liquid foam form. The inverse thermosensitive polymer solution can undergo a reverse phase change from a liquid to a gel upon warming (e.g., once dispensed onto or into a body part).

The invention provides a preparation method of a two-dimensional high-strength coating material, which comprises the following steps: under the protection of inert gas, dissolving melamine and trimesoyl chloride as reaction monomers in a solution A, adding triethylamine as an acid-binding agent, and promoting amidation reaction through magnetic stirring; after the reaction is finished, washing with saturated saline solution and NaHCO3 to remove impurities, and then obtaining high-purity two-dimensional polymer powder through the steps of solution mixing, ultrasonic treatment, centrifugal separation and the like. And finally, dissolving polymer powder in the solution F to prepare two-dimensional polymer solutions with different concentrations, and coating the two-dimensional polymer solutions on the surface of a substrate pretreated by acetone and isopropanol to obtain a flat and compact coating film. The triethylamine is adopted as the acid binding agent, so that the purity and the reaction efficiency of the polymer are improved, the preparation controllability and the structural uniformity of the coating material are remarkably improved, and the high-performance coating requirements in the fields of machinery, chemical protection and the like are met.

The invention belongs to the technical field of membrane electrodes, and particularly relates to a hydrogen fuel cell catalyst layer slurry based on hydrophilic and hydrophobic regulation and a preparation method of a membrane electrode. The slurry of the catalyst layer comprises the following contents: the slurry of the PEM close to the cathode side comprises a Pt / C catalyst, deionized water, a perfluorosulfonic acid ionic polymer solution and isopropanol; the mass ratio, namely I / C ratio, of the ionic polymer to the carbon carrier is 0.8-1.2; the GDL cathode side slurry comprises a Pt / C catalyst, deionized water, a perfluorosulfonic acid ionic polymer solution, a PTFE aqueous solution (polytetrafluoroethylene aqueous solution) and isopropanol, and the mass ratio of the ionic polymer to the carbon carrier, namely I / C ratio, is 0.3-0.5. High hydrophilic ionomer content is reserved on the side, close to the cathode, of the PEM, proton conduction and catalyst active site wetting are guaranteed, the proportion of hydrophobic ionomers and hydrophobic materials is increased on the GDL side, a drainage channel is formed, liquid water is prevented from blocking gaps, then the performance of the membrane electrode is remarkably improved, and the interface contact resistance is stabilized to be 1.64-1.76 m omega (2.5 A / cm < 2 >).

The invention relates to a lithium ion battery and a preparation method thereof. The lithium ion battery comprises a positive pole piece, a negative pole piece and a gel electrolyte, the gel electrolyte is formed by polymerizing an electrolyte prepolymerization solution, and the mass percentages of a cross-linking agent, a monomer and an initiator in the electrolyte prepolymerization solution are A%, B% and C% respectively; a positive electrode material layer in the positive electrode plate is formed by coating the surface of a positive electrode current collector with positive electrode slurry; the positive electrode slurry comprises a fast ion conductor, and the mass percentage content of the fast ion conductor in the positive electrode slurry is X%; the lithium ion battery satisfies the following relational expressions: the formula 1: 5 < B / A < 10; in the formula 2, C / (A + B) is more than 0.005 and less than 0.02; formula 3: 1.7 < = (A + B + C) / X < = 5.5. According to the scheme provided by the invention, a high-performance organic-inorganic hybrid network can be constructed, and the cycle performance of the battery is remarkably improved while the thermal shock performance of the battery is improved.

The invention belongs to the technical field of lithium battery positive electrode materials, and provides a method for improving the performance of lithium iron phosphate through secondary calcination of iron phosphate, and the method comprises the following steps: S1, mixing iron phosphate with a dispersant to obtain a mixture; s2, the mixture is sequentially subjected to pulping, filter pressing, drying and calcination, and a first precursor is obtained; s3, sequentially mixing, filtering and drying the first precursor and a perfluorosulfonic polymer solution to obtain a second precursor; and S4, sequentially mixing, grinding and sintering the second precursor and a lithium source to obtain the lithium iron phosphate. The compaction density of the lithium iron phosphate is larger than 2.6 g / cm < 3 >, the sphericity degree is larger than or equal to 0.8, the average particle size range is 300-500 nm, the first charge gram capacity is 160-165 mAh / g, the energy density is 110-115 mWh / g, and the rate performance 1C discharge ratio is larger than 93%.

The invention provides a preparation process of a composite current collector, the composite current collector and a negative-electrode-free sodium metal battery. The preparation process of the composite current collector comprises the following steps: mixing aromatic diamine, an acrylate monomer and a polyester polymer, adding an initiator, adding a graphene solution, and mixing to obtain a polymer solution; carrying out hydrothermal reaction on the polymer solution to obtain three-dimensional porous flowable gel; and compounding the three-dimensional porous flowable gel on a current collector to obtain the composite current collector. According to the preparation process disclosed by the invention, a polymer obtained by polymerizing aromatic diamine and acrylate monomers under the action of an initiator and a hydrothermal reaction is used as a transverse and longitudinal skeleton, a polyester polymer is used as an interlayer cross-linking agent, and graphene is used as a lamellar skeleton, so that three-dimensional porous flowable gel can be compounded on the current collector; the three-dimensional porous flowable gel can improve the gram volume exertion and cycle performance of the negative-electrode-free sodium metal battery.

The invention discloses an electrostatic ionization device and an array spinning ionization box, and relates to the field of textile processing machinery, the electrostatic ionization device comprises an ionization assembly, the ionization assembly is provided with a backflow groove with a top opening, and a metal wire which is horizontally arranged and can be externally connected with a power supply is arranged above the backflow groove; the reciprocating assembly comprises a liquid supply brush making contact with the upper surface of the metal wire and can drive the liquid supply brush to reciprocate along the axis of the metal wire and coat the surface of the metal wire with a polymer solution used for electrostatic ionization. The liquid supply assembly can store a polymer solution and convey the stored polymer solution to the liquid supply brush, and the backflow groove is communicated with the liquid supply assembly and can collect the polymer solution dripping in the process that the surface of a metal wire is brushed by the liquid supply brush and flow back into the liquid supply assembly. According to the electrostatic ionization device and the array spinning ionization box, the solution utilization rate can be increased, rapid replacement of multiple solution varieties can be achieved, raw material waste is reduced, and the production cost is reduced.

The invention belongs to the field of flexible piezoelectric polymer materials, and discloses a polyvinylidene fluoride based ferroelectric polymer and a preparation method thereof. The preparation method comprises the following steps: (1) adding an inorganic alkaline reagent into a polyvinylidene fluoride-trifluoroethylene ferroelectric polymer solution, carrying out dehydrofluorination and nucleophilic addition-elimination reaction to generate a polymer with an enol structure, and then washing, precipitating and purifying a reaction product; and (2) re-dissolving by using an organic solvent, then forming a film by using a tape casting method, and carrying out ketone-enol tautomerization reaction in the film forming process of the tape casting method to finally prepare the polyvinylidene fluoride based ferroelectric polymer film. According to the effective modification and preparation method disclosed by the invention, an enol structure is promoted to be converted into a more stable ketone structure through a ketone-enol tautomerization reaction by utilizing a high-temperature environment in a film forming process, so that C = O double bonds are introduced into a polymer chain, and the piezoelectric property of the polymer is remarkably enhanced.

The invention provides an oil-water separation mineralization net film as well as a preparation method and application thereof. The oil-water separation mineralization net film comprises an organic layer crosslinked on a grid substrate, the inorganic layer grows in the organic layer in an in-situ mineralization manner; the organic layer is a polymer layer formed by coating a polymer solution containing a cross-linking agent on the grid substrate for cross-linking; the inorganic layer is an inorganic mineral particle layer which grows on the surface of the organic layer in an in-situ mineralization mode. The mineralized net film for oil-water separation not only has excellent binding capacity with the grid substrate, but also has high chemical stability of acid resistance, alkali resistance and organic solvent resistance and excellent mechanical performance, and can be widely applied to oil-water separation under complex conditions.