22results about How to "Simple and efficient process" patented technology

The invention discloses a preparation method of a modified asphalt tire-free waterproof coiled material, which is characterized by comprising the following steps: taking the following raw materials in percentage by mass: 41-43% of asphalt, 9-12% of softening oil, 10-11% of tire rubber powder, 1-3% of SBS (Styrene Butadiene Styrene), 3-4% of SBR (Styrene Butadiene Styrene), 1-2% of basalt fiber and 28-34% of filler, mixing and stirring the asphalt and the softening oil, heating to 190-195 DEG C, adding the tire rubber powder, heating to 190-195 DEG C, and stirring for 20-30 minutes, thereby obtaining the modified asphalt tire-free waterproof coiled material. Cooling to 185-190 DEG C, adding SBS and SBR, adding basalt fiber, carrying out heat preservation and stirring, adding a filler, and stirring and mixing to obtain an asphalt composition; and coating one surface of the film with the asphalt composition, and then covering a layer of film, thereby obtaining the modified asphalt tire-free waterproof coiled material. The prepared modified asphalt tire-free waterproof coiled material is good in performance and suitable for buildings to resist external rainwater erosion, prevent underground water leakage and the like.

The invention discloses a preparation method of a polymer microporous material, and relates to the field of polymer microporous material research. The microporous material prepared by the invention has rich and controllable pore structures, and the permeability and hydrophilicity of the material are remarkably improved, so that the microporous material can quickly absorb moisture and keep a wet state; and meanwhile, effective regulation and control on the microporous structure are realized by adjusting process parameters such as solution concentration, solvent type, coagulating bath temperature and time. In addition, the mechanical strength and stability of the material are enhanced through uniform micropore distribution, and the reliability of the material in practical application is ensured. The polymer microporous material shows excellent hydrophilicity and structural stability, and is suitable for the fields of water treatment, environmental protection and the like.

This invention relates to a Ni-doped cobalt sulfide three-dimensional graphene anode material for sodium-ion batteries and its preparation method, belonging to the field of electrochemical energy storage. A NiCoCN precursor is obtained by grinding and mixing nickel nitrate, cobalt nitrate, and urea uniformly, followed by air annealing. The precursor is then mixed with a commercial graphene oxide solution, stirred, centrifuged, washed, and dried to obtain a NiCoCN / graphene oxide precursor. High-temperature sulfidation using thiourea as a sulfur source via vapor deposition yields the NiCoSCN@three-dimensional graphene anode material. When this anode material is applied to sodium-ion battery anodes, nickel doping improves the rate performance and long-cycle stability of the material. (5 A g) ‑1 After 400 cycles, the capacity retention is ≥80% at 10 A g. ‑1 After 1000 cycles, the capacity retention rate can still reach over 65%. This method has a simple preparation process and broad application prospects in the energy field.

The invention provides a wurtzite boron nitride / diamond composite material and a preparation method and application thereof, the composite material is composed of two phases of wurtzite boron nitride and diamond, and has a stacked sandwich microstructure, the sandwich microstructure comprises at least one first wurtzite boron nitride layer and at least one second wurtzite boron nitride layer, wherein the first wurtzite boron nitride layer is formed by wurtzite boron nitride; at least one second wurtzite boron nitride layer composed of wurtzite boron nitride; the composite material comprises a first wurtzite boron nitride layer, a second wurtzite boron nitride layer and a diamond layer, the diamond layer is arranged between the first wurtzite boron nitride layer and the second wurtzite boron nitride layer and is made of diamond, wurtzite boron nitride is a metastable phase stably existing under normal pressure, and the Vickers hardness of the composite material is larger than 50 GPa. The novel wurtzite boron nitride / diamond composite material disclosed by the invention has high hardness, high toughness and high thermal stability, and the preparation method disclosed by the invention is low in initial raw material price and simple in preparation process.

The invention relates to a recombinant elastin-like protein as well as a preparation method and application thereof, and belongs to the technical field of biomacromolecules. The invention provides a recombinant elastin-like protein. The recombinant elastin-like protein comprises an elastin-like protein motif and a collagen III functional motif, the amino acid sequence of the elastin-like motif is VPGXG, and X in the VPGXG is any one of H, R, K, I, F, L, W, A, M, C, N, V, G, S, Q, Y, D, E and T; the amino acid sequence of the III type collagen functional motif is as shown in SEQ ID NO. 1. The invention provides a recombinant elastin-like protein which is fused with a collagen motif and an elastin motif of a triple helix structural domain with cell adhesion promoting activity, has temperature-sensitive characteristics, pH response characteristics and gel characteristics, and has anti-aging, anti-inflammatory, skin barrier repairing and soothing effects.

The application provides a wurtzite boron nitride / diamond composite material and a preparation method and application thereof. The composite material is composed of two phases of wurtzite boron nitride and diamond, and has a stacked sandwich microstructure, which comprises at least one first wurtzite boron nitride layer composed of wurtzite boron nitride, at least one second wurtzite boron nitride layer composed of wurtzite boron nitride, and a diamond layer composed of diamond and sandwiched between the first wurtzite boron nitride layer and the second wurtzite boron nitride layer. The wurtzite boron nitride is a metastable phase stably existing under normal pressure, and the Vickers hardness of the composite material is greater than 50 GPa. The novel wurtzite boron nitride / diamond composite material has high hardness, high toughness and high thermal stability, and the preparation method has low starting material price and simple preparation process.

The invention discloses a method for preparing a compound 3,5-dichloro-2-pentanone, comprising the following steps: using α-acetyl-γ-butyrolactone (II) as a raw material, reacting with hypochlorite and hydrochloric acid, absorbing the dilute hydrochloric acid aqueous solution obtained by water with the generated hydrogen chloride gas, sampling and analyzing, α-acetyl-γ-butyrolactone (II) content ≤1%, the reaction solution is heated and continued to react, and compound (III) 3-chloro-4-oxygen-1-pentanol is generated; the dilute hydrochloric acid aqueous solution obtained in step (1) is added to compound (III) 3-chloro-4-oxygen-1-pentanol, and hydrochloric acid is added to react to obtain compound (I) 3,5-dichloro-2-pentanone. The inventive method has mild reaction conditions and simple process, and the two-step reaction can be operated continuously, and can also be realized by "one-pot method", and the obtained product content is high, which is of great significance to industrial production.

The application provides a time synchronization system and method based on a TDMA system wireless network virtual-real joint simulation, which comprises a physical network and a virtual network simulation system, time synchronization between multiple physical nodes of the physical network is completed through radio frequency signals, and wireless communication of the TDMA system is adopted; one of the physical nodes is a gateway node, the gateway node is provided with a first interface and a second interface, the first interface is used for generating a time slot pulse signal, and the second interface is used for generating a time slot numerical signal; the virtual network simulation system communicates with the physical network, and the virtual physical network system is provided with a third interface for receiving the time slot pulse signal and a fourth interface for receiving the time slot numerical signal; wherein the time slot pulse signal carries synchronization interrupt information, the time slot numerical signal carries time slot time information, and the virtual network simulation system realizes time synchronization with the physical network through the time slot pulse signal and the time slot numerical signal. The application has high time synchronization precision and low resource consumption.

The gutter inlet shaping mold comprises an outer mold, an inner mold, a steel plate strip, a positioning pipe and a connecting steel plate, the outer mold is of a regular polygon structure formed by fixedly connecting a plurality of side vertical steel plates end to end, the inner mold is of a regular polygon structure formed by fixedly connecting angle steel with the same number end to end, and the height of the steel plates is larger than that of the angle steel. The inner mold is arranged in the center of the outer mold, the side walls of the inner mold and the outer mold are arranged in parallel, the steel plate strips are welded and fixed to the corresponding corners of the outer mold and the inner mold respectively, the lower sides of the steel plate strips protrude and are embedded into concrete, and the steel plate strips serve as caulking strips for concrete parting after the gutter inlet is poured. The positioning pipe is fixed to the center of the inner mold through the connecting steel plate, the inner mold and the outer mold have a height difference to form a gradient so that cup opening concrete modeling can be integrally formed, meanwhile, the steel plate strips serve as caulking strips for gutter inlet four-corner concrete parting, and the construction procedure is simplified.

Disclosed in the present invention is a total synthesis method for vitamin A and derivative thereof and deuterated compound thereof. β-cyclocitral is used as a starting material to produce alkenyl boronate, then the alkenyl boronate (or hydrolyzed alkenyl boric acid) is subjected to a series of reactions to produce retinal or retinal with substituent, and the retinal or retinal with substituent is further subjected to a reduction reaction to obtain vitamin A or vitamin A with substituent; the vitamin A or vitamin A with substituent is subjected to an esterification reaction to obtain vitamin A ester or vitamin A ester with substituent; or said retinal or retinal with substituent is subjected to an oxidation reaction to obtain vitamin A acid or vitamin A acid with substituent. When deuterated allenol is used, deuterated vitamin A and derivative thereof are obtained. The present invention has the advantages of short synthetic route, simple operation, readily available raw materials and reagents, and modularization and divergence, and can synthesize the deuterated vitamin A and derivative thereof which are difficult to synthesize in the prior art.

The invention discloses an anti-trailing safety access control device and an anti-trailing method.The anti-trailing safety access control device comprises a frame, an outer side door, an inner side door, a transmission mechanism, a sensor and a comprehensive operation table, and the frame, the outer side door, the inner side door, walls, a floor and a ceiling jointly define a closed space; the outer side door and the inner side door are arranged on the two sides of the frame respectively, an outer side door driving mechanism and an inner side door driving mechanism are fixedly connected to the frame respectively, the outer side door driving mechanism is connected with and drives the outer side door through a transmission mechanism, and the inner side door driving mechanism is connected with and drives the inner side door through a transmission mechanism. A sensor is installed on a ceiling in the closed space, and a comprehensive operation table is installed on the wall in the closed space. According to the method, the permitted personnel can quickly pass, the verification process is simple and efficient, the existence of the following personnel can be accurately judged, the following personnel are prevented from entering, and the safety is relatively high while the personnel access management is effectively realized.

The invention provides a self-assembled molecular layer, an alkali metal ion battery positive electrode modification method and application thereof, and belongs to the technical field of alkali metal ion batteries. Monomer molecules of the self-assembled molecular layer are composed of anchoring groups, middle groups and terminal groups, the anchoring groups are combined with transition metal or other surface groups in the positive electrode material of the alkali metal ion battery, and chemical and electrochemical reactions at an interface are adjusted through the middle groups and the terminal groups; the preparation method of the self-assembled molecular layer comprises the following steps: putting an alkali metal ion battery positive electrode material or a positive electrode plate into a monomer molecular solution, soaking for a certain time, taking out, cleaning the electrode plate with a pure solvent, and drying. When the self-assembled molecular layer provided by the invention is used for modifying the positive electrode of the alkali metal ion battery, the side reaction between the positive electrode and electrolyte can be inhibited, a stable interface phase can be formed, and the interface resistance can be reduced, so that the polarization growth and the capacity fading in the battery circulation process can be relieved, and the service life of the battery can be prolonged.

The invention discloses a rare earth Er low-temperature modified amorphous alumina hydrogen / deuterium / tritium resistant coating and a preparation method thereof. The coating comprises a metal substrate and an Er low-temperature modified amorphous alumina coating covering the metal substrate. The preparation method comprises the following steps: pre-treating the metal substrate; preparing Er modified amorphous alumina sol containing an aluminum source and erbium salt through a sol-gel process; a coating prefabricated layer is formed on a substrate through a coating technology, organic matter is removed through low-temperature heat treatment, and the coating is obtained. According to the coating, Er-O bonds and interface hydrogen blocking traps are formed through solid solution and nanocrystalline precipitation of Er in an amorphous aluminum oxide network, and the barrier property is remarkably improved. Experiments show that when the Er modification proportion is 10%, the deuterium permeation barrier factor PRF of the coating reaches 2407, and the permeability of the coating is reduced by about three orders of magnitude compared with that of a stainless steel matrix. The method is simple in process, low in preparation temperature, excellent in hydrogen resistance and suitable for the fields of nuclear energy, hydrogen energy and the like.

This invention discloses a modified aluminide coating based on Ni2Al3 powder, its preparation method, and its application, belonging to the field of high-temperature alloy surface protection technology. The invention uses Ni2Al3 powder and aluminum powder as the aluminum source, silicon powder and rare earth oxides as modifiers, and polyvinyl alcohol aqueous solution as a binder. These are mixed to form a slurry, which is then coated onto the surface of an alloy substrate. After high-temperature sintering, a coating is formed on the substrate surface. This invention introduces Ni2Al3 alloy powder to replace traditional pure Al powder as the aluminum source, fully utilizing the advantages of Ni2Al3 alloy powder, overcoming the limitations of existing coating preparation methods, and effectively improving the stability of the coating under high-temperature environments. It has significant engineering application value and broad industrial prospects in the field of anti-oxidation protection in high-temperature environments such as aero-engine turbine blades.

The utility model provides an automatic tea packaging device, which relates to the technical field of tea processing and comprises a material injection box, a material outlet is arranged on the material injection box, the material injection box is communicated with a screening box fixedly arranged on the material injection box through a conveying pipe, an emergency stop electromagnetic valve is arranged on the material outlet, and a chain plate conveying belt is arranged below the material outlet. An automatic cover covering assembly and a plurality of mounting plates are arranged on the chain plate conveying belt, each mounting plate is provided with a weighing assembly and a containing groove used for containing a sealing cover, a feeding hopper, a discharging opening and a vibration motor are arranged on the screening box, and the discharging opening communicates with a discharging pipe; the device can automatically complete material injection weighing of tea leaves and cover sealing packaging after weighing, manual intervention is not needed, the labor intensity is reduced, the process is convenient and efficient, meanwhile, manual discharging of tea stems and residual materials is not needed, discharging of the tea stems and the residual materials can be automatically completed along with screening, and the automation degree of tea leaf packaging is improved.

This invention belongs to the field of electrochemical power source technology, and relates to a multi-metal ion-substituted V site M x V₂O₅ materials, their preparation methods, and applications. The preparation steps are as follows: Citric acid monohydrate, anhydrous oxalic acid, and ammonium metavanadate are sequentially added to deionized water and stirred until completely dissolved to obtain a first solution; citric acid monohydrate and a salt containing metal cation M are added to deionized water and stirred until the salt containing metal cation M is completely dissolved to obtain a second solution; the two solutions are mixed evenly and reacted under a preset temperature to form a gel-like product; the gel-like product is dried to obtain a precursor dry gel; then, after grinding and high-temperature annealing, M is obtained. x V₂O₅ material. The M x When V2O5 is used as a cathode material for lithium-ion secondary batteries, it exhibits excellent reversible capacity and cycle stability, and eliminates the problems of voltage drop and poor cycle stability of traditional V2O5 during discharge.

This invention discloses a green production method for biodiesel. First, pretreated feedstock oil and methanol are preheated and then fed into a reactor loaded with a superhydrophobic polymer solid acid catalyst for esterification. After oil-water separation, the oil phase is then fed into a reactor loaded with a macroporous strong-base ion exchange resin for transesterification. The biodiesel product is collected by vacuum distillation. The biodiesel production method provided by this invention has strong feedstock adaptability, no wastewater discharge, and excessive energy consumption. Methanol can be recycled, resulting in high feedstock utilization and product quality. Furthermore, the catalyst is simple to prepare, the reaction rate is fast, and the active phase is not easily lost.

The invention discloses a preparation method of a cast-rolling-pushing composite molded thick-wall high-performance elbow. The preparation method is simple, convenient and efficient in process, suitable for planned mass production of thick-wall elbows, low in cost and stable in quality. According to the method, (1) an intermediate-frequency smelting furnace is firstly adopted for smelting and tempering alloy to obtain alloy melt, and then refining is performed through furnace bottom argon blowing, so that the alloy can be better refined, and the quality and the stability of the final elbow are improved; and (2) the steel wire roller brush rotates to polish and clean the inside and the outside of the pipe blank at high temperature (such as about 700 DEG C), so that impurities and dross thereof are efficiently removed. And (3) the residual temperature (about 600 DEG C) of the thick-wall cast pipe blank is utilized, the pipe blank with residual heat is repeatedly and axially rolled, and the inner diameter and the outer diameter of the pipe blank are synchronously enlarged while the thickness of the pipe wall is reduced.

The application discloses a wind turbine tower bolt loosening identification method and system, comprising the following steps: S1, obtaining unit operation data; S2, calculating the actual tower frequency, and then generating the corresponding time sequence; S3, performing stability analysis on the generated time sequence, and marking the suspected bolt loosening abnormal points of the tower; and S4, determining the loosening position of the tower bolt. Without using special monitoring hardware equipment, the application is based on the existing general operation data fusion driving of the unit, constructs the corresponding algorithm, realizes the reliable monitoring and early warning of the tower bolt loosening, and has the advantages of high accuracy, high reliability, low cost, and the like.

The invention discloses a preparation method of a magnetic hydrothermal carbon adsorbent, and belongs to the technical field of adsorbent preparation. The method comprises the following steps: (1) taking red mud and peanut shells as raw materials, and respectively preparing red mud powder and peanut shell powder; (2) mixing the red mud powder and the peanut shell powder to obtain mixed powder; (3) adding a NaOH solution into the mixed powder, uniformly stirring, and then transferring into a hydrothermal reaction kettle for hydrothermal reaction; and (4) carrying out solid-liquid separation after the hydrothermal reaction, and washing and drying a solid-phase product to obtain the magnetic hydrothermal carbon adsorbent. According to the invention, synergistic conversion and high-added-value utilization of two industrial and agricultural solid wastes of red mud and peanut shells are innovatively realized, and the magnetic hydrothermal carbon adsorbent with excellent adsorption performance and magnetic performance is prepared by a hydrothermal method. The method has the advantages of being short in process, high in efficiency, low in energy consumption and the like, and has wide application prospects in the fields of environmental governance and resource recycling.

The invention relates to the technical field of traditional Chinese medicinal material extraction, and discloses a mesona chinensis liquid multistage countercurrent extraction device and a use method thereof, the mesona chinensis liquid multistage countercurrent extraction device comprises: a first fixed base placed on the ground; the extraction structure comprises a first extraction part and a second extraction part, the first extraction part comprises a first countercurrent tank placed at the top of the first fixed base, a first fixed plate is fixedly mounted on the outer wall of one side of the first countercurrent tank, a first servo motor is fixedly mounted at the top of the first fixed plate, and a first rotating rod is arranged in the first countercurrent tank; an output shaft of the first servo motor is fixedly connected with one end of a first rotating rod through a coupling, and three groups of first stirring fan blades are fixedly mounted on the outer wall of the first rotating rod; the purpose of stirring and mixing materials is achieved, the mixing effect of the materials and an extracting solution is improved, the extraction degree of the materials is improved, material adding is facilitated, operation of operators is facilitated, and the using flexibility of the device is improved.

The invention discloses a novel rare earth cerium oxide CeO2 hydrogen-deuterium-tritium resistant coating and a preparation method thereof, which are suitable for the fields of nuclear energy, hydrogen energy, petrochemical industry, aerospace and semiconductor manufacturing. The coating comprises a substrate and a CeO2 nanocrystalline coating covering the substrate, and the substrate is made of a metal material. Before preparation, the metal base material needs to be ground and polished, and surface oil stains and oxide layers are removed; then, preparing CeO2 sol through a sol-gel process (Sol-gel) by utilizing a coordination-assisted deposition method; and finally, preparing a CeO2 coating through a pulling method, and heating the CeO2 coating by using a muffle furnace to generate nanocrystals. The CeO2 nanocrystal has excellent hydrogen / deuterium / tritium permeation blocking capacity, and the performance and the service life of the coating can be greatly improved and prolonged.