193 results about "Polymer dissolution" patented technology

The invention discloses a preparation method of an ultrahigh-reflectivity radiation refrigeration fiber membrane, which comprises the following steps: dissolving a polymer in an organic solvent to prepare an electrostatic spinning precursor solution, and adjusting parameters such as the concentration of the electrostatic spinning precursor solution, spinning voltage, spinning distance, roller rotating speed, liquid supply rate, slide rail reciprocating rate and the like to prepare the ultrahigh-reflectivity radiation refrigeration fiber membrane. And preparing the ultrahigh-reflectivity radiation refrigeration fiber membrane with a porous structure, wherein the reflectivity of the ultrahigh-reflectivity radiation refrigeration fiber membrane is greater than 95% at the sunlight wave band of 0.3-2.5 microns. In the dissolving process of the polymer in the organic solvent, the water bath stirring temperature is 20-60 DEG C, the stirring time is 3-6 hours, a bilateral multi-nozzle opposite layout is adopted in electrostatic spinning, the spinning distance is 15-30 cm, the electrostatic spinning voltage is 20-50 kV, the rotating speed of a roller is 400-1000 r / min, the spinning liquid supply rate is 8-30 ml / h, the reciprocating rate of a sliding rail is 3-10 mm / s, and the thickness of the ultrahigh-reflectivity radiation refrigeration fiber membrane is 300-500 microns. The radiation refrigeration film prepared through the method can be prepared in batches, has good flexibility and can be widely applied to the fields of clothes, buildings, equipment and the like.

The invention provides a phosphoric acid doped polybenzimidazole high-temperature proton exchange membrane and a preparation method thereof. In the membrane material, the range of the mass fraction of the phosphoric acid in the polybenzimidazole polymer is greater than 0 wt.% and not greater than 3000 wt.%. The membrane is prepared by the following steps: S1, dissolving a polybenzimidazole polymer in a solvent, and adding phosphoric acid to obtain a composite solution; and S2, casting the composite solution onto a membrane forming container, and drying to obtain the phosphoric acid doped polybenzimidazole high-temperature proton exchange membrane. The phosphoric acid doped polybenzimidazole high-temperature proton exchange membrane not only can be used for preparing HT-PEM without internal stress so as to prevent loss of phosphoric acid, but also can be used for randomly and accurately controlling the phosphoric acid doping amount and thickness of the prepared membrane through the composition and volume of the solution; therefore, the phosphoric acid doped polybenzimidazole composite HT-PEM without internal stress, which has high stability and ultrahigh specific proton conductivity, is prepared.

The invention discloses a flexible carbon nano net film material and a preparation method thereof, and belongs to the technical field of nanofiber electrode materials. The preparation method of the flexible carbon nano net film material comprises the following steps: dissolving a polymer in a solvent A to obtain a solution B; ultrasonically dispersing the solution B in a solvent C to obtain a net spraying emulsion; wherein the solution B and the solvent C are immiscible; and carrying out electrostatic net spraying on the net spraying emulsion to obtain a polymer nano net film, pre-oxidizing, applying longitudinal and transverse tension in a protective atmosphere, calcining, and cooling to obtain the flexible carbon nano net film material. The flexible carbon nano net film material has an efficient conductive network, shows excellent conductivity and flexibility, and is widely applied to the fields of wearable equipment, flexible sensors, energy storage equipment and biomedical equipment.

The invention provides a preparation method of a monodisperse microsphere with a porous structure on the surface for rapidly promoting collagen regeneration, which comprises the following steps: (1) dissolving or dispersing a pore-foaming agent and a polymer in an organic solvent to obtain an internal phase fluid; the preparation method comprises the following steps: dissolving a water-soluble surfactant in water, adding a proper amount of an organic solvent, and fully mixing to obtain an external phase fluid or a collection liquid; (2) inputting the internal-phase fluid and the external-phase fluid into a microfluid device to prepare a monodisperse oil-in-water emulsion, collecting the oil-in-water emulsion by adopting a collecting solution, fully standing, and stirring to completely volatilize an organic solvent in the oil-in-water emulsion to obtain monodisperse microspheres; and (3) washing to remove the collection liquid and the pore-foaming agent on the monodisperse microspheres. The surfaces of the monodisperse microspheres prepared by the method have uniformly distributed porous structures, and the pore diameters of the porous structures are uniform. The problem that in the prior art, it is difficult to controllably prepare microspheres with uniform porous structures on the surfaces and used in the field of medical cosmetology can be solved.

The invention provides a perovskite thin film preparation method, a perovskite thin film and a perovskite solar cell. The method comprises the steps of obtaining a substrate for preparing the perovskite thin film; obtaining a perovskite precursor solution, wherein the perovskite precursor solution comprises a first monomer molecule containing sulfydryl and a second monomer molecule containing a carbon-carbon double bond; coating the perovskite precursor solution on the substrate and carrying out annealing treatment to form a perovskite thin film; and photo-initiating a click reaction between sulfydryl in the first monomer molecule and a carbon-carbon double bond in the second monomer molecule to construct a cross-linked polymer network in situ in the perovskite thin film. A first monomer molecule containing sulfydryl and a second monomer molecule containing a carbon-carbon double bond are introduced into a perovskite precursor solution, so that the problem that the doping amount is limited due to poor solubility of a polymer when the polymer is directly added is avoided.

The invention discloses a high-voltage output elastic self-crimping spiral fiber and a preparation method and application thereof, and belongs to the technical field of fiber preparation. The preparation method comprises the following steps: dissolving a thermoplastic piezoelectric polymer in a first solvent dissolved with metal salt to prepare a first spinning solution; a high-elasticity polymer is dissolved in a second solvent to prepare a second spinning solution, the second solvent is different from the first solvent, and the high-elasticity polymer is incompatible with the thermoplastic piezoelectric polymer; taking the first spinning solution as a shell layer solution and the second spinning solution as a core layer solution, and carrying out electrostatic spinning by adopting a two-component core-shell electrostatic spinning process. The preparation method is simple, and the prepared fiber has excellent mechanical property and enhanced piezoelectric effect and can be applied to flexible electronic devices and intelligent wearable equipment.

The invention provides an electrochromic film, an electrochromic device and a preparation method of the electrochromic film, and relates to the technical field of electrochromic materials.The preparation method of the electrochromic film comprises the steps that a conjugated polymer is dissolved in a good solvent, and an electrochromic medium is obtained; preparing the electrochromic medium into an electrochromic film by adopting a spin coating method or a blade coating method; the electrochromic film is placed in a dopant solution to be doped, and the final electrochromic film is obtained. The invention provides a novel color changing mode of the polythiophene-based electrochromic film, and can improve the problem of poor bistable performance of the existing polythiophene-based electrochromic film.

The invention belongs to the technical field of porous adsorption membrane materials, and discloses a titanium lithium ion porous adsorption membrane material and a self-assembly preparation method and application thereof. The preparation method comprises the following steps: dissolving a film-forming polymer in a dispersion liquid containing MXene nanosheets to form a uniform precursor liquid; the MXene nanosheet is a transition metal carbide, nitride or carbonitride with a single-layer structure; dispersing a titanium-lithium composite oxide into the precursor solution to form a membrane casting solution; coating the membrane casting solution on a support body, and then performing phase inversion through pure water to obtain a matrix membrane; and placing the matrix membrane in a lithium eluent for immersion cleaning, replacing lithium ions in the matrix membrane, and carrying out a self-assembly reaction on the titanium-lithium composite oxide in the matrix membrane to obtain the titanium-based lithium ion porous adsorption membrane material. The MXene nanosheet and the polysulfone matrix membrane are innovatively introduced, the MXene nanosheet is fixed on the polysulfone matrix membrane to serve as an in-situ growth substrate of the titanium-lithium composite oxide, and the obtained membrane material has high adsorption capacity.

The invention discloses offshore oilfield chemical flooding fully-closed instant curing injection allocation process equipment and a using method. The offshore oilfield chemical flooding fully-closed instant curing injection allocation process equipment comprises an efficient dispersion system, an instant curing system and a high-pressure injection system which are sequentially connected. The efficient dispersing system comprises a feeding mechanism and a dispersing mechanism which are connected with each other; the instant curing system comprises a high-viscosity efficient ager, a supergravity ager, a low-shear feeding pump, a tubular rotational flow ager and a mother liquor duplex filter which are communicated in sequence; the high-pressure injection system comprises a high-pressure polymer injection pump, a high-pressure tubular rotational flow ager, a first high-pressure internal part coupling disperser and a second high-pressure internal part coupling disperser which are connected in sequence. By taking the stator and rotor disperser, the internal part coupling dynamic disperser, the high-viscosity and high-efficiency ager and the supergravity ager as a core, the device has the characteristics of low carbon, high efficiency, miniaturization, modularization, distribution and the like, the polymer dissolving and curing time is shortened, the equipment weight and the occupied area are reduced, and the polymer solution viscosity and the oil displacement efficiency are improved.

The application belongs to the technical field of porous adsorption membrane materials, and discloses a titanium lithium ion porous adsorption membrane material and a self-assembly preparation method and application thereof. The preparation method comprises the following steps: dissolving a film-forming polymer in a dispersion liquid containing MXene nanosheets to form a uniform precursor liquid; the MXene nanosheet is a carbide, nitride or carbonitride of a transition metal with a single-layer structure; dispersing a titanium lithium composite oxide in the precursor liquid to form a casting solution; coating the casting solution on a support, and then performing phase inversion by using pure water to obtain a matrix film; placing the matrix film in a lithium elution liquid for immersion washing, replacing lithium ions in the matrix film, and causing a self-assembly reaction of the titanium lithium composite oxide in the matrix film, so that the titanium lithium ion porous adsorption membrane material is obtained. The application innovatively introduces MXene nanosheets and a polysulfone matrix film, fixes the MXene nanosheets on the polysulfone matrix film as an in-situ growth substrate of the titanium lithium composite oxide, and the obtained membrane material has a high adsorption capacity.

The invention provides a preparation method of a hydrogel film, the hydrogel film and application, the preparation method comprises the following steps: S1, dissolving a polymer in a solvent I, and adding an aldehyde compound to obtain a polymer solution; s2, inorganic salt is dissolved in a solvent II, sulfuric acid is added, and a coagulating bath solution is obtained; s3, extruding and spreading the polymer solution on the surface of the coagulating bath solution to form a film, so as to obtain the hydrogel film. According to the prepared hydrogel film, spreading film forming and curing processes are combined, the preparation time of the hydrogel film is greatly shortened, and the problem that the hydrogel film is difficult to cure and form is solved.

The invention discloses a polymer electrolyte, a preparation method thereof and a battery, and the preparation method of the polymer electrolyte comprises the following steps: dissolving a polymer containing a nucleophilic functional group in a polar solvent to obtain a first polymer solution; dissolving a natural high-molecular polymer in a polar solvent to obtain a second polymer solution; mixing the first polymer solution and the second polymer solution to form a double-polymer solution; adding a cross-linking agent into the double-polymer solution, casting, standing and curing to obtain a polymer film; immersing the polymer membrane in a polar solvent for removing the residual cross-linking agent and the non-cross-linked polymer and carrying out soaking swelling absorption, and then freeze-drying at a temperature of-55 DEG C to-35 DEG C, so that pores are formed in the polymer membrane to form a porous polymer membrane; and soaking the porous polymer membrane to absorb electrolyte containing lithium salt, and standing to obtain the dual-network polymer electrolyte. The ionic conductivity of the polymer electrolyte is effectively improved.

The invention discloses a mixed matrix membrane based on defect MOF and a preparation method and application thereof, and the method comprises the following steps: (1) dissolving a hydroxyl-containing monodentate carboxyl organic ligand and 2-aminoterephthalic acid in a solvent A, stirring at room temperature, and carrying out ultrasonic treatment to obtain a mixed solution; then dropwise adding tetraisopropyl titanate into the mixed solution, and carrying out heating reaction in a reaction kettle; after the reaction is finished and cooling is carried out, a solid product is collected through centrifugation, washed and dried, and DN-MIL-125 is obtained; (2) dispersing DN-MIL-125 in a solvent B to obtain a DN-MIL-125 suspension, dissolving an intrinsic microporous polymer cPIM-1 in a solvent C to obtain a cPIM-1 solution, and then uniformly mixing the cPIM-1 solution with the DN-MIL-125 suspension to obtain a membrane casting solution; and carrying out defoaming treatment on the membrane casting solution, and forming a membrane by adopting a solution casting method to obtain the mixed matrix membrane DN-MIL-125 / cPIM-1. According to the method, the defective metal organic framework material DN-MIL-125 is added into the cPIM-1 intrinsic microporous polymer to prepare the mixed matrix membrane, and the separation performance of CO2 / N2 gas can be remarkably improved.

A method for preparing an aramid nanofiber dispersion includes dissolving an aromatic polyamide-based polymer in a solution including a basic material and an aprotic polar solvent, while performing stirring so that a nanofiber is produced, wherein the aromatic polyamide-based polymer is a polymer in a form of a solid which is not spun into a fiber form, the stirring is performed at a temperature of 50° C. or lower and at a speed of 10-1000 rpm so that a time taken for the aromatic polyamide-based polymer to be dissolved and formed into an aramid nano-fiber dispersion is 80 hours or less, an aramid nanofiber in the aramid nanofiber dispersion has an average diameter of 1 to 100 nm and an average length of 0.1 to 100 μm, and the basic material includes potassium hydroxide or sodium hydroxide.

The invention discloses a preparation method of polymer drug-loaded nanoparticles. According to the method, on the basis of an emulsification method, the controllable continuous preparation of the polymer drug-loaded nanoparticles is realized by utilizing an ultrasonic micro-fluidic technology. The method specifically comprises the following steps: dissolving a drug and a polymer in a water-insoluble organic solvent to serve as an organic phase, taking a surfactant aqueous solution as a water phase, introducing the two phases into ultrasonic microfluidic equipment at a certain flow velocity ratio, and emulsifying under the ultrasonic action to obtain uniform liquid drops; and removing the organic solvent by methods of stirring, rotary evaporation, vacuum centrifugation, ultrafiltration and the like to obtain the cured polymer drug-loaded nanoparticles. The nanoparticles prepared by the method are uniform in particle size and high in drug encapsulation efficiency, and can be continuously produced.

The invention relates to the technical field of oil and gas field development engineering and intelligent control, in particular to a polymer dry powder direct distribution fracturing fluid remote data transmission control system which comprises an environmental parameter acquisition center used for acquiring the conductivity, the fluid temperature, the fluid pH value, the mineralization degree and the dry powder polymer nominal molecular weight of a fracturing operation site. The data is sent to the dynamic reference construction unit; the dynamic reference construction unit is used for obtaining theoretical equilibrium viscosity and a characteristic swelling time constant, and constructing a theoretical reference evolution equation by utilizing the theoretical equilibrium viscosity and the characteristic swelling time constant; the space-time mapping sensing unit collects main path mixed flow to obtain an actually measured dissolution rate signal; the active factor identification unit is used for calculating a polymer dissolution active factor; the cascade feedback control unit generates predicted final value viscosity and a screw feeder frequency conversion control signal, and constructs a semantic feature transmission vector; accurate feedforward control over the performance of the fracturing fluid is achieved, and the hysteresis problem of traditional control is solved.

The invention relates to the technical field of wave-absorbing materials, in particular to a high-entropy nano-alloy fiber wave-absorbing material, a preparation method thereof and wave-absorbing non-woven fabric, and the preparation method comprises the following steps: dissolving a polymer in a mixed solvent of DMF and acetone to form a solution, then adding metal salt, and stirring at 60-80 DEG C to obtain a spinning solution; performing electrostatic spinning on the spinning solution to obtain a high-entropy alloy nanofiber precursor; and pre-oxidizing the high-entropy alloy nano-fiber precursor at 220-240 DEG C under an air condition, and calcining at 800-900 DEG C to obtain the high-entropy nano-alloy fiber wave-absorbing material. The high-entropy nano-alloy fiber with uniform morphology and uniform multi-metal nanoparticle distribution is prepared by adopting a mode of combining electrostatic spinning and high-temperature calcination; according to the high-entropy nano-alloy fiber, through the synergistic enhancement performance of all the elements, the material is endowed with excellent corrosion resistance while the excellent microwave absorption performance is guaranteed.

A method for purifying a regenerated polymer into a higher-purity polymer is disclosed. In embodiments of the present invention, the method comprises obtaining a regenerated polymer, leaching various contaminants using a leaching solvent to produce an leached polymer, and then dissolving the leached polymer in a solvent to produce a first solution containing the dissolved polymer. The first solution is precipitated, filtered, and extracted. A higher-purity polymer is separated from the obtained solution.

The present invention provides organic particles with high solvent resistance, which are made from a polymer having a main skeleton of cis-1,4-polyisoprene, a typical example of which is natural rubber. [Solution] A method for producing organic particles includes the steps of dissolving a polymer having cis-1,4-polyisoprene as a main skeleton in a solvent and carrying out a cyclization reaction to obtain a cyclized rubber having a cyclization rate of 60 to 90%, and suspension polymerizing the cyclized rubber and a vinyl monomer in the presence of water and a suspension stabilizer, wherein the polymer having cis-1,4-polyisoprene as a main skeleton has a Mooney viscosity [ML(1+4)100°C] specified in JIS K 6300 of 18 to 65, and the vinyl monomer contains a monofunctional vinyl monomer having only one vinyl group and a crosslinkable vinyl monomer having multiple vinyl groups.

The invention discloses anti-adhesion hemostatic hydrogel as well as a preparation method and application thereof. The preparation method of the anti-adhesion hemostatic hydrogel comprises the following steps: dissolving an amino high-molecular polymer in a first solvent to obtain a component A; dissolving a cross-linking agent, a reaction active compound and an anti-tissue adhesion drug in a second solvent to obtain a component B; wherein the cross-linking agent is a dialdehyde compound, and the reaction active compound contains an NHS group; before use, the component A and the component B are mixed, and then in-situ crosslinking can be performed to obtain the anti-adhesion hemostatic hydrogel. The anti-adhesion hemostatic hydrogel disclosed by the invention can form a layer of physical barrier at a wound of an organ, so that the effects of stopping bleeding and preventing tissue adhesion are achieved; in addition, the anti-adhesion drugs uniformly dispersed in the gel network enhance the anti-tissue adhesion effect of the adhesive through the effects of inhibiting tissue surface fibroblast proliferation, promoting fibrin degradation, resisting inflammation and oxidation and the like; the hemostatic hydrogel disclosed by the invention has the advantages of biodegradability and good biocompatibility.

The present invention relates to the technical field of luminescent materials, and discloses an organic room-temperature phosphorescent material with controllable afterglow performance, a preparation method thereof, and an application thereof. The method includes the following steps: Step 1, dissolving a terpyridine derivative and a polymer in water to obtain a precursor solution; removing water by volatilization to obtain an organic room-temperature phosphorescent material; Step 2, soaking the organic room-temperature phosphorescent material in an aqueous solution containing lanthanide ions, and removing water by volatilization to obtain the organic room-temperature phosphorescent material with controllable afterglow performance; by regulating the concentration of lanthanide ions in the aqueous solution containing lanthanide ions, the afterglow performance of the organic room-temperature phosphorescent material is regulated, and the prepared material still has the advantage of transparency. On the other hand, the organic room-temperature phosphorescent material with controllable afterglow performance exhibits long-wavelength fluorescence emission and short-wavelength afterglow emission, greatly expanding the scope of practical applications.

The invention relates to the technical field of polymer dissolution, in particular to a polymer dissolution packed bed, a polymer dissolution system and a polymer dissolution method. The packing ring can rotate while revolving, and the contact opportunity and the contact time of the packing ring and a solution can be increased and prolonged by utilizing the rotation of the packing ring, so that the efficiency of a chemical reaction or physical separation process is improved, and a polymer is quickly dissolved. Meanwhile, the design of rotation and revolution of the packing ring is beneficial to more uniformly mixing treated substances, reducing mass transfer or heat transfer resistance and improving the uniformity of the whole process. The revolution mechanism and the rotation mechanism jointly form a multi-shaft type rotation transmission mechanism, revolution is achieved through driving of a single revolution motor, and meanwhile rotation of each packing ring is achieved through the revolution process of each first gear and the meshing relation between each first gear and a static second gear. According to the multi-shaft type rotation transmission mechanism, the kinetic energy of the motor can be more effectively utilized, and the energy consumption of equipment is reduced.

The invention discloses a preparation method and application of an in-situ copolymerized PIM-pillararene composite membrane, a tetrahydroxy-containing compound and a tetrafluoro-containing compound are used as reaction monomers, a precursor matrix is synthesized by adjusting the proportion of the tetrafluoro-containing compound, and then a mixed matrix polymer is obtained by in-situ doping of polyhydroxy pillararene. Dissolving a polymer in an organic solvent to obtain a membrane casting solution; and coating a solvent-resistant substrate with the membrane casting solution, and drying in a drying oven to obtain the composite membrane with high separation performance. Fluorine groups in a PIM matrix and hydroxyl groups on cyclic polyhydroxy aromatic hydrocarbon molecules are subjected to chemical cross-linking reaction to enhance the porosity of the polymer and increase the specific surface area, and column aromatic rings are introduced to promote adsorption of guest molecules, so that rich high-performance transmission channels are formed. On the basis of PIM synthesis, a polyhydroxy pillar arene compound is further introduced, the membrane stability can be improved through a rich net structure, and the separation performance of common organic solvents is remarkably improved.

The application discloses a flexible carbon nanometer net film material and a preparation method thereof, and belongs to the technical field of nanometer fiber electrode materials. The preparation of the flexible carbon nanometer net film material comprises the following steps: dissolving a polymer in a solvent A to obtain a solution B; ultrasonically dispersing the solution B in a solvent C to obtain a spraying net emulsion; wherein the solution B and the solvent C are immiscible; performing electrostatic spraying on the spraying net emulsion to obtain a polymer nanometer net film; performing pre-oxidation on the polymer nanometer net film; applying longitudinal and transverse tension to the polymer nanometer net film under a protective atmosphere; calcining the polymer nanometer net film; and cooling the polymer nanometer net film to obtain the flexible carbon nanometer net film material. The flexible carbon nanometer net film material has an efficient conductive network, exhibits excellent conductive performance and flexibility, and has a wide application in the fields of wearable devices, flexible sensors, energy storage devices and biomedical devices.

The present invention provides a modifier for silicon-based anode materials, a modified silicon-based anode material and its application. The modifier for silicon-based anode materials comprises a combination of a first polymer and a second polymer. The first polymer is a water-soluble polymer, and the second polymer is a water-insoluble polymer. The first polymer and the second polymer are dissolved in the same non-aqueous solvent. The modifier for silicon-based anode materials can uniformly coat the surface of the silicon-based material to obtain a modified silicon-based anode material with a polymer coating layer. In the preparation of the anode slurry, the first polymer dissolves to form a porous network-like coating structure on the surface of the silicon-based material, effectively alleviating the volume expansion of the silicon-based material during charge and discharge, preventing the pulverization and shedding of the material, and having excellent structural stability and cycling performance. At the same time, there are still a large number of conductive channels on the surface of the silicon-based material, which will not cause an increase in the impedance of the material, and has excellent rate performance.

A method for inhibiting the formation of scale in a subterranean geological includes injecting a scale-inhibiting composition into a subterranean geological formation comprising a target zone. The scale inhibiting composition includes water and an amphiphilic polymer selected from the group consisting of S1, S2, and combinations thereof, where the structure of S1 is:the structure of S2 is:where x is in a range from 4 to 20, and n is in a range from 3 to 15, and where the amphiphilic polymer is dissolved in the scale inhibiting composition in an amount such that the concentration of the amphiphilic polymer at the target zone is equal to or greater than 500 ppm.

The invention belongs to the field of composite membranes, and particularly relates to a waterproof breathable membrane based on a micropore-nanofiber composite structure and a preparation method of the waterproof breathable membrane. Comprising the following steps: preparing an ePTFE microporous membrane by adopting a thermally induced phase separation method or a two-way stretching method, and carrying out corona treatment on the ePTFE microporous membrane; dissolving a fiber-forming polymer in an organic solvent to form a uniform spinning solution; the ePTFE microporous membrane obtained after corona treatment is fixed to a receiving roller; carrying out electrostatic spinning by adopting a multi-jet nozzle to obtain a nanofiber / base membrane composite blank; meanwhile, an N, N-dimethylformamide steam treatment cabin is arranged behind the receiving roller, then continuous interface fusion and reinforcement treatment is immediately carried out on the just deposited nanofiber / base membrane composite blank through a hot pressing roller, and the composite membrane is obtained; and drying and rolling the composite film to obtain the waterproof breathable film with the micropore-nanofiber composite structure. The breathable film provided by the invention realizes extremely high hydrostatic pressure and excellent water vapor permeability, and also has good mechanical strength and durability.

The invention discloses a nano-channel based on Pd-Co cyanogen gel nano-enzyme, a preparation method and application of the nano-channel in glucose detection, and belongs to the technical field of biosensors. The nano-channel based on Pd-Co cyanogen glue nano-enzyme is a TiO2 nano-channel (TiNM) with two open ends, the two open ends are a large opening end and a small opening end respectively, metal organic frameworks (MOFs) are grown in situ in the TiNM through a biomimetic mineralization method to immobilize Pd-Co cyanogen glue nano-enzyme molecules, and a metal organic framework composite nano-enzyme structure is formed. Meanwhile, the end face of the small opening end is coated with a pH response polymer to form a gating structure. Glucose generates gluconic acid and hydrogen peroxide under catalysis of Pd-Co cyanogen gel nano-enzyme, the pH change in the channel is triggered, and the pH response polymer is dissolved, so that the gating structure is activated to be opened. The sensor is used for glucose detection, has relatively high selectivity and relatively strong anti-interference capability on glucose, and has good repeatability and operation stability.

To provide a method for producing a graphene dispersion liquid which suppresses coagulation and sedimentation of graphene that is easily coagulated and is a nanomaterial, can efficiently obtain a dispersion liquid having high concentration of the graphene, and can keep a dispersion state for a long period of time.SOLUTION: A method for producing a graphene dispersion liquid includes a step (A) of crushing graphite and an organic acid salt while mixing the substances in a paste state by a dry process, a step (B) of washing a mixture obtained in the step (A) with water, and obtaining a graphite composite body of the graphite and the organic acid salt, and a step (C) of mixing the graphite composite body and a dispersion solution in which a polymer is dissolved in a polar solvent while imparting shear force thereto, and delaminating the graphite composite body in the dispersion solution, wherein viscosity of the dispersion solution is 3.0 mPa s to 25.0 mPa s, and surface tension of the dispersion solution is 10 mN / m to 60 mN / m.SELECTED DRAWING: None

The invention belongs to the technical field of oil and gas field development and research, and relates to a method and system for predicting the solubility of a non-Newtonian polymer in a forced stretching device and a readable medium, and the method comprises the following steps: obtaining the viscosity of a target polymer after natural dissolution, and fitting an intrinsic equation according to the viscosity; based on the intrinsic equation and the swelling behavior of the polymer particles, establishing a swelling double-fluid model, and inputting the mass transfer rate of the non-Newtonian polymer into the swelling double-fluid model to generate a liquid phase volume fraction and a solid phase volume fraction; inputting the volume fractions of the liquid phase and the solid phase into a component transport equation to generate the mass fractions of all components in the solid phase so as to obtain the solid density; inputting the liquid-phase and solid-phase volume fractions into the group equilibrium model to generate the average particle size of solid-phase particles; coupling output results in the swelling double-fluid model, the component transport equation and the group balance model to obtain the dissolving property of the non-Newtonian polymer. The method can more accurately predict the behavior characteristics of particles in non-Newtonian complex fluid so as to realize the process optimization of polymer rapid dissolution configuration.