478results about How to "Easy to make" patented technology

A double-use nozzle adapter includes a main body, a switch unit, and a needle unit. The switch unit includes a shifting member and a rigid retaining member. The rigid retaining member is arranged between the shifting member and the main body. The shifting member shifts the rigid retaining member between a first position and a second position. The needle unit is slidably installed in the main body and includes a needle. In the first position, the shifting member drives the rigid retaining member to press against the needle, thereby preventing the needle from moving with respect to the main body and making the needle connectable to a Schrader valve. In the second position, the rigid retaining member moves between the shifting member and the main body, so as to allow the needle to move with respect to the main body and make the needle connectable to a Presta valve.

The utility model discloses a regulating valve and cooking utensil, the regulating valve includes valve body and valve seat, the valve seat is equipped with the air inlet hole, at least part of valve body is located in the valve seat, the valve body is equipped with the first air outlet hole and the second air outlet hole of interval arrangement, the regulating valve still includes the supplementary airflow channel, the first air outlet hole is linked together with the air inlet hole, and the second air outlet hole is linked together with the air inlet hole through the supplementary airflow channel. The regulating valve of utility model embodiment is good in spill-proof effect, and high in safety.

This invention belongs to the field of gas sensor technology and discloses a method for preparing europium ferrite nanosensors and their applications. This method utilizes electrospinning technology combined with a specific low-temperature confined-domain calcination process (550℃~700℃) to prepare EuFeO3 nanotubes with a hollow structure and rough surface by taking advantage of the thermal decomposition kinetics differences of poly(p-v) magnets (PVP). This process effectively suppresses excessive repair of lattice oxygen while forming a unique tubular morphology, effectively "freezing" oxygen vacancies (O2) accounting for up to 34.44% on the material surface in situ. v This invention addresses the shortcomings of traditional solid fiber materials by constructing a sensor using a grinding, dispersion, and coating process. Utilizing the dual reactive surfaces of hollow nanotubes and high-concentration oxygen vacancy active sites, it achieves highly sensitive and selective detection of low-concentration ethylene gas released during fruit ripening. This invention solves the problems of small specific surface area and insufficient active sites in traditional solid fiber materials.

The application belongs to the technical field of metal glass film preparation, and specifically discloses a high-strength and high-toughness nano-multilayer metal glass with gradient component design and a preparation method thereof. The high-strength and high-toughness nano-multilayer metal glass comprises periodically repeated gradient unit structures, each of which is stacked by six component layers; wherein, along the deposition direction from bottom to top, the atomic percentage of Cu in each component layer first decreases and then increases, and the atomic percentage of Ta first increases and then decreases. The application overcomes the shortcomings of the existing metal glass, which has high strength but low toughness, and greatly improves the plastic deformation capacity of the metal glass through the unique gradient structure design and the corrugated interface formed by high deposition gas pressure.

This utility model discloses a photovoltaic bracket suspension support structure, mainly comprising triangular support stabilizing units. Each triangular support stabilizing unit consists of two equally sized right-angled triangular supports symmetrically arranged on the left and right sides of a column. The right-angled triangular supports are composed of a column, a crossbeam, and diagonal braces, with the column and crossbeam serving as the right-angled sides and the diagonal braces as the hypotenuses. The two right-angled triangular supports share a single column. This utility model offers advantages such as economy and safety, high construction efficiency, and rapid component installation. It effectively solves problems such as difficulty in installing photovoltaic modules in fish-solar hybrid projects, agricultural-solar hybrid projects, and projects with excessively high ground clearance, which often result in low efficiency, long construction periods, and uneconomical costs.

This invention discloses a controllable patterned wetting microfluidic chip and its preparation method. The preparation method includes the following steps: injecting an alkaline solution into a glass chip channel and allowing it to stand to hydroxylate the surface of the glass chip channel; after standing, cleaning and drying the glass chip channel; then preparing a hydrophobic film on the surface of the glass chip channel; subsequently treating the hydrophobic film to adjust the hydrophobicity of a preset area of ​​the hydrophobic film, thereby obtaining the controllable patterned wetting microfluidic chip. This invention, by preparing a hydrophobic film on the surface of the glass chip channel and then treating it to adjust the hydrophobicity of a preset area, enables the glass chip channel to have different surface properties, fully replicating the complex wetting properties of oil reservoirs. Furthermore, the contact angle can be freely adjusted according to the formation properties, achieving controllable patterned wetting. The fabrication process is simple, low-cost, and does not require expensive equipment.

The application belongs to the technical field of biology and particularly relates to a kind of biomimetic enzyme and its application in degrading aflatoxin.The raw material of the biomimetic enzyme includes polypeptide and divalent copper ion, the sequence of the polypeptide is shown in SEQ ID No.1, specifically: Ac-HCHLKLKLKL-CONH2, the N terminal of the polypeptide is acetylated, and the C terminal is amidated.The biomimetic enzyme is constructed by sequencing design and metal coordination to construct an active site, is stable in catalyzing AFB1 rupture in wide pH and temperature, has the advantages of good tolerance, high catalytic efficiency, and has potential application advantages in the application in grain and feed purification.

The utility model belongs to the technical field of unmanned aerial vehicles, and discloses a loading unmanned aerial vehicle. The loading unmanned aerial vehicle comprises an unmanned aerial vehicle body, a loading basket and an adjustable clamp. And a loading platform is arranged on the top back part of the unmanned aerial vehicle body and is detachably fixed. The object carrying basket is placed on the object carrying platform with an opening facing upwards, and the object carrying basket is used for carrying objects. The adjustable clamp comprises two clamping plates, the two clamping plates are oppositely arranged on the carrying platform, and the two clamping plates can be close to or away from each other to clamp or loosen the carrying basket. The object-carrying unmanned aerial vehicle is good in flight stability; manufacturing and fixing are easy, article loading and unloading are convenient, and the device is more suitable for convenient carrying of miniature articles; and the adaptability to carried articles is high.

The application discloses a liquid metal-based shape-insensitive flexible conductive fabric and a preparation method and application thereof. The preparation method comprises the following steps: preparing a thermoplastic polyurethane elastomer (TPU) fiber pad and a liquid metal (LM) microsphere solution; uniformly depositing and trapping the LM microspheres in the pores of the TPU fiber pad through vacuum filtration; and hot-pressing the TPU fiber pad filled with the LM microspheres to make the LM microspheres break and fuse, so that a continuous conductive path is formed, and a flexible conductive fabric is obtained. The conductive fabric takes the TPU fiber pad as a flexible skeleton, and provides good deformation and recovery capacity; the LM is a conductive filler, and has excellent conductivity and fluidity. When various deformations such as stretching, bending, compression and twisting occur, the LM can deform synchronously with the TPU fiber skeleton and does not leak, and has good shape-insensitive conductivity. The conductive fabric can be applied to the fields of flexible high-conductive electrodes, flexible circuits, electromyographic signal monitoring, electrocardiographic signal monitoring and heat management.

This application proposes an mMOFs / GO-CS composite film, its preparation method, and its application, which can be used for fruit and vegetable preservation. The method includes the following steps: Step S1: Prepare modified mMOFs; Step S2: Weigh water, film-forming agent, glycerol, and graphene oxide dispersion. First, stir the water, film-forming agent, and glycerol until dissolved to obtain a transparent solution A; Under stirring conditions, add the graphene oxide dispersion dropwise to the transparent solution A to obtain solution B; Step S3: Weigh the mMOFs prepared in Step S1, disperse them in distilled water, and then add them dropwise to solution B under stirring conditions. Cast the film, and after drying, obtain the mMOFs / GO-CS film. This application describes the preparation of mMOFs with high surface area, large porosity and adjustable pore size, with graphene oxide as a linker, and chitosan to construct a bifunctional preservation film with both antibacterial and ethylene adsorption properties. The preparation method is simple and the composite film is biodegradable. It can be used to preserve freshly picked fruits and vegetables, extend the storage time of fruits and vegetables, and reduce the damage and waste of fruits and vegetables with respiratory climacteric effects.

The invention belongs to the technical field of synthesis of extraction agents, and particularly relates to a preparation method and application of amido diphosphinic acid. The preparation method comprises the following steps: (1) mixing a solvent, primary amine, cyclohexylphosphinic acid and inorganic acid, and heating until the solution is clear and transparent; (2) adding a formaldehyde solution or paraformaldehyde into the clear and transparent solution for reaction; and (3) removing a water phase from the mixture obtained after the reaction in the step (2) is finished, dissolving jelly obtained after the water phase is removed by using dichloromethane, and carrying out washing, rotary evaporation and drying to obtain the amido diphosphinic acid.

The invention relates to the field of photovoltaic modules, and particularly provides a photovoltaic module and a waterproof adhesive tape for the photovoltaic module, the waterproof adhesive tape comprises an adhesive tape main body, the adhesive tape main body comprises: a substrate layer; the supporting layer is arranged on one side of the base material layer; the blocking layer is arranged on the side, away from the base material layer, of the supporting layer; the water-blocking bonding layer is arranged on one side, far away from the supporting layer, of the blocking layer; wherein the water-blocking bonding layer can be fixedly connected with a laminated piece of the photovoltaic module. By means of the structure, the strength of the waterproof adhesive tape can be guaranteed through the supporting layer, the waterproof effect can be guaranteed through the blocking layer, and the bonding reliability of the waterproof adhesive tape can be guaranteed through the water blocking bonding layer.

The invention relates to perovskite quantum dot glass powder and a preparation method thereof, the chemical formula of the glass powder is CsPb (Ax B1-x) 3, A and B are one or more of Cl, Br or I, x is more than or equal to 0 and less than or equal to 1, and the total molar amount of the components is 100 mol%. According to the perovskite quantum dot glass powder, the fluorescence wavelength can be adjusted through component change, the preparation method is simple and low in toxicity, and the perovskite quantum dot glass powder has high stability and does not need an annealing process. The method can be widely applied to the fields of display devices, lighting equipment, photovoltaic devices, photoelectric sensors and the like.

The application discloses a preparation device of curved cut tobacco, comprising: a conveying steel belt, which is used for conveying tobacco thick paste laid on the conveying steel belt along the running direction of the conveying steel belt; a drying mechanism, which is used for drying the tobacco thick paste, and the conveying steel belt is arranged through the drying mechanism along the running direction; a comb mechanism, which is arranged above the conveying steel belt, and the comb mechanism comprises combs and a transverse driving element, the combs are towards the conveying steel belt and are used for cutting the running tobacco thick paste, and the transverse driving element is used for driving the combs to reciprocate along the width direction of the conveying steel belt, so as to obtain a plurality of cut curved tobacco thick pastes. By adopting the above technical scheme, the curved cut tobacco is easy to be prepared, the adhesion between the curved cut tobaccos is improved, the curved cut tobacco is rapidly brought to the expected temperature, and the smoking experience of cigarettes is improved. The application further discloses a preparation method of the curved cut tobacco. The application further discloses the curved cut tobacco prepared according to the preparation method.

This invention discloses a ketoisomerase mutant and its application in the preparation of D-chiral inositol, belonging to the field of genetic engineering technology. The ketoisomerase mutant is obtained by mutating the amino acid sequence shown in SEQ ID NO.1, specifically by mutating amino acid position 62 and / or amino acid position 175 of the amino acid sequence shown in SEQ ID NO.1. After the above-mentioned mutation of the wild-type thermostable ketoisomerase, the resulting ketoisomerase mutant not only retains the advantages of the wild-type thermostable ketoisomerase—its heat resistance and susceptibility to temperature fluctuations—but also exhibits higher enzyme activity. When co-catalyzing the reaction of muscle inositol to D-chiral inositol with inositol dehydrogenase, it can further improve the conversion rate and yield of D-chiral inositol even at high substrate concentrations.

The present application relates to the field of environment-friendly materials and its preparation technology, and particularly relates to a degradable environment-friendly paper cup interior coating and a preparation method thereof. The method comprises the following steps: firstly, synthesizing polymerizable quaternary ammonium salt surfactant (RPKO-X), and then introducing the polymerizable quaternary ammonium salt surfactant and a bio-based polymer solution into a polyacrylate molecular chain by a redox initiation polymerization method, so as to obtain a degradable acrylate emulsion for paper cup interior coating. By introducing the hydrophobic monomer RPKO-X with emulsifier characteristics, a stronger crosslinking network is formed, which can significantly improve the water resistance and oil resistance of the coating. Meanwhile, by introducing the bio-based material polyvinyl alcohol 2688, the environmental friendliness of the coating is enhanced, and the rapid degradation of the coating after use is promoted. By using the redox initiation polymerization system, the method is simple to prepare, can be prepared under mild conditions, and the emulsion particle size is uniform and stable.

The invention discloses a flexible semiconductor gas sensor for detecting bromine gas and a preparation method of the flexible semiconductor gas sensor, and belongs to the technical field of harmful gas detection.The flexible semiconductor gas sensor is characterized in that an MIL-68 (In) derived In2O3 and carbon nanofiber composite material is prepared by adopting an electrostatic spinning method, and the porous structure and the high specific surface area of MOF are utilized, so that the bromine gas detection sensitivity is improved; the bromine gas adsorption capacity and the surface reaction activity are obviously enhanced, and the sensitivity, the selectivity and the moisture resistance of the sensor are improved. The method is simple in preparation process, low in cost and suitable for large-scale production. And through ultraviolet excitation, the sensor can quickly respond at room temperature, and compared with a traditional semiconductor gas sensor, the energy consumption is reduced. According to the invention, electrolyte leakage of the zinc-bromine flow battery can be monitored in time, environmental pollution is prevented, and the safety and operation reliability of the system are improved.

The invention provides a low-water-absorption glass bead modified PBT (polybutylene terephthalate) material and a preparation method thereof. The low-water-absorption glass bead modified PBT material comprises the following components in parts by weight: 70-100 parts of PBT resin; 0 to 30 parts of solid glass beads; 0-5 parts of a toughening agent; 0-2 parts of an antioxidant; 0-2 parts of a lubricant; 0-2 parts of black color master batch; 0-2 parts of a coupling agent; 0-5 parts of polytetrafluoroethylene wax; wherein the average particle size of the solid glass beads is 1-50 [mu] m; the average particle size of the polytetrafluoroethylene wax is 3-15 [mu] m, and the weight-average molecular weight of the polytetrafluoroethylene wax is 10000-30000 g / mol; the weight ratio of the solid glass beads to the polytetrafluoroethylene wax is (5-10): 1. According to the invention, the polytetrafluoroethylene wax is added into the solid glass bead modified PBT material, so that the shrinkage difference between the material flow direction and the vertical flow direction is effectively reduced, the water absorption rate of the material is remarkably reduced, the preparation process is simple, and the production process is easy to control.

The application discloses a kind of eutectic solvent and its preparation method and application, the eutectic solvent is used for the dissolution, separation or regeneration of cellulose and / or starch, the eutectic solvent includes first solvent, second solvent and water;The first solvent is selected from at least one of the compounds shown in formula 1.The eutectic solvent of the application has very good solubility for cellulose and / or starch, can quickly dissolve a large amount of cellulose and / or starch, is suitable for the dissolution, separation and regeneration of cellulose and / or starch, etc., and is low in cost, easy to prepare, the raw materials used are all harmless to the environment, can be recycled, is an environmentally friendly solvent system.

The invention discloses an interactive touch sensing and electrical stimulation output system for a conductive interface, which comprises a first linear conductive unit and a second linear conductive unit which are distributed in a transverse and longitudinal staggered manner, and the two linear conductive units form a layered grid structure through an insulating linear unit in an alternate arrangement manner; the end parts of the first linear conductive unit and the second linear conductive unit are connected with an electrical state detection circuit and a high-voltage constant-current power supply; the electrical state detection circuit and the high-voltage constant-current power supply are connected with a controller; the high-voltage constant-current power supply is used for supplying power to the first linear conductive unit and the second linear conductive unit; the electrical state detection circuit is used for acquiring electrical signal changes of the first linear conductive unit and the second linear conductive unit; the controller controls the high-voltage constant-current power supply to output current to the first linear conductive unit and the second linear conductive unit based on the electric signal change information so as to generate electrical stimulation; the device has the functions of electric tactile stimulation and touch tracking at the same time.

A high-load cobalt-based single-atom catalyst for oxygen reduction and its preparation method are disclosed, belonging to the field of electrocatalysis technology. This method utilizes the cage structure in ZnCo-ZIF to encapsulate nitrogen-rich metal molecules, followed by high-temperature carbonization under nitrogen conditions to obtain the catalyst. Benefiting from the separating effect of Zn metal nodes in ZIF and the spatial confinement effect of the ZIF cages, as well as the high nitrogen content in the guest molecule, a cobalt-based single-atom catalyst with a loading of 4.0 wt% was prepared. Furthermore, compared to traditional preparation methods, the catalyst prepared using a mixed solvent exhibits a small particle size, resulting in a high specific surface area that fully exposes the active sites. The large specific surface area allows for the full exposure of the high-load metal atom active sites, thus demonstrating excellent performance in the oxygen reduction reaction, with a half-wave potential of 0.88 V and a limiting current density of 6.0 mA·cm⁻¹ in 0.1 M KOH electrolyte. ‑2 .

The present application belongs to the field of radiation cooling material design, and relates to a high-radiation cooling performance composite fiber membrane PVDF-HFP / PDMS and a preparation method thereof, characterized by preparing a composite fiber membrane with uniform single nanofiber and excellent radiation cooling effect by using a mixed solution of polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) and polydimethylsiloxane (PDMS). The preparation method has the advantages of simple preparation method, environmental friendliness, large-size preparation, easy scaling, etc., and makes up for the problems of the existing radiation cooling materials, such as insufficient daytime cooling effect, hydrophobicity, poor flexibility, insufficient tensile resistance and the like.

The application provides a preparation method of a composite molecular sieve and application of the composite molecular sieve in heavy oil cracking, and the preparation method comprises the following steps: dissolving an aluminum source, a silicon source and a structure directing agent in water, and then performing crystallization treatment to obtain a ZSM-5 crystal seed solution; etching Y type molecular sieve in water by using an alkaline substance to form a hollow structure, and then mixing the hollow Y type molecular sieve with acidic silica sol to obtain a solution containing the hollow Y type molecular sieve; mixing the ZSM-5 crystal seed solution and the solution containing the hollow Y type molecular sieve, and then performing temperature crystallization, and then separating a crystallization product, and then performing washing, drying and calcination to obtain a ZSM-5 / Y composite molecular sieve, and then performing ion exchange reaction, and then performing calcination to obtain a H type ZSM-5 / Y composite molecular sieve product. The composite molecular sieve synthesized by the application has the advantages of high activity, good selectivity and the like when the composite molecular sieve is prepared into a catalyst, high liquefied gas and propylene yield can be obtained, and the composite molecular sieve is particularly suitable for the field of petrochemical catalytic cracking.

The invention discloses a model similarity design method suitable for a wave-underwater vibration table test. The method comprises the steps of determining a geometric similarity ratio of a reduced scale model; determining a structural density similarity ratio, a structural elastic modulus similarity ratio and a water density similarity ratio of the reduced scale model; determining a vertical geometric similarity ratio; determining an x-direction geometric similarity ratio under the action of a horizontal earthquake; determining a geometric similarity ratio in a horizontal y direction; the wavelength similarity ratio in the x direction is determined; and determining a wave height similarity ratio and the like. The method has the advantages that the reduced scale model in the design test is adopted, coordination similarity between water and the structure is achieved by changing the cross section size similarity ratio of the structure without changing the structure density similarity ratio, the method is simple and practical, model manufacturing is easy and convenient, and the method is suitable for large-scale production. And a feasible method can be provided for similar design of a wave-underwater vibration table test model under the earthquake-wave action.

The present application relates to a novel long-acting solid coated slow-release acid and a preparation method. The solid coated slow-release acid has a core-shell structure, the shell layer comprises a polymer, and the core comprises an acid former; the acid former is at least one selected from chlorinated aromatic hydrocarbons, chlorinated acid esters and acid chlorides, and the polymer is at least one selected from polyesters, poly(meth)acrylates, epoxy resins, polyolefins, polyacrylonitriles, polyimides, polyvinyl alcohols. The solid coated slow-release acid has the advantages of small environmental pollution, long acid release time, excellent deep penetration performance, high acid generating efficiency, easy storage and transportation, good slow-release performance and simple preparation.

The application discloses a kind of delta-MnO2-GO catalyst and its preparation method and application in room temperature formaldehyde degradation, it is related to inorganic catalyst technical field.The preparation method of delta-MnO2-GO catalyst of the application can significantly limit the growth of manganese dioxide nanosheet by doping with low amount of GO, to manufacture abundant mass transfer transmission channel, delta-MnO2-GO catalyst presents unique two-dimensional crown structure, two-dimensional coral-like hierarchical pore structure delta-MnO2 nanorod is uniformly dispersed on the GO of plane structure, greatly promote the exposure of catalytic site and the mass transfer of reactant, produce a large number of surface active oxygen ROS and hydroxyl radical-OH, greatly maintain the excellent catalytic activity and stability to HCHO degradation, stably realize nearly 100% HCHO elimination at room temperature.

The application discloses a preparation method of an iron-based catalyst, the iron-based catalyst and application of the iron-based catalyst. The preparation method mainly comprises three steps: firstly, a mixed solution of an iron-based precursor and an organic template agent with uniform distribution is prepared by means of stable temperature and autogenous pressure in a solvothermal process; subsequently, a weak alkaline precipitant without alkali metal is added into the mixed solution under heating to prepare an iron-based precipitate; finally, a honeycomb-shaped iron-based catalyst for ortho-para hydrogen conversion is prepared through steps of cleaning, drying, calcining, granulating, re-cleaning and activation. By adding the organic template agent, the pore structure of the catalyst is effectively improved without affecting the crystal type of the catalyst, and the performance of the catalyst is improved; and the weak alkaline precipitant without alkali metal is adopted, so that the controllability of the preparation process of the catalyst is enhanced, the influence of impurities such as alkali metal ions on the performance of the catalyst is effectively avoided, and the method has a simple process and high practical potential.

The application discloses an aluminum cover forming method and an aluminum cover and relates to the technical field of aluminum cover manufacturing. The aluminum cover forming method comprises the following steps: S1, placing an aluminum plate into an initial forming die, and forming a macro-domain large curved surface in the middle of the aluminum plate and an initial foot position with the same height as a required foot position on the circumferential edge of the aluminum plate through the extrusion force of a press machine and the initial forming die; S2, placing the aluminum plate preliminarily formed in S1 into a final forming die, and further forming the macro-domain large curved surface formed in the middle of the aluminum plate into a final shape at room temperature through the final forming extrusion pressure of the press machine, and flowing and filling the edge cavity of the final forming die to form an edge through the extrusion of the final forming die, and forming a final foot position shape through the extrusion of the initial foot position; and S3, opening the die to take out the formed aluminum cover. The production of the large-size foot position height aluminum cover can be realized at room temperature, the energy consumption is low, and the aluminum cover is simple and convenient to manufacture.