597results about How to "Inhibit migration" patented technology

The invention relates to the technical field of metal bearings, in particular to a reinforced liquid metal sliding bearing. The enhanced liquid metal sliding bearing comprises a rotor, a stator and liquid metal filled in an assembling gap between the rotor and the stator. The fixed positions of the rotor and the stator are provided with a spiral groove structure, a textured microstructure, an infiltration coating and a sealing coating. By adopting the enhanced liquid metal sliding bearing provided by the invention, the wettability and the wear resistance of a bearing rotating pair can be improved, and the problems of coating falling, wear, poor lubrication and the like of the enhanced liquid metal sliding bearing in a high-vacuum, high-temperature, high-pressure, high-speed and high-load use environment are effectively solved. High-pressure sealing is formed on the gaps between the stator and the rotor and between the limiting rings of the stator and the rotor, the liquid metal is kept in the bearing, the assembled bearing does not need a vacuum environment in the transfer process, meanwhile, external gas is prevented from entering the bearing structure, and the possibility that the liquid metal leaks or gets stuck is reduced.

The invention relates to the field of hot melt adhesives, and discloses a biodegradable hot melt adhesive based on castor oil and rosin resin and a preparation process thereof, the biodegradable hot melt adhesive comprises EVA resin, modified castor oil, rosin resin, a modified additive, a lubricant and an antioxidant; the modified castor oil is prepared by crosslinking castor oil and isophorone diisocyanate and reacting lignin, 1, 4-butanediol and isocyanate groups; the modified castor oil and the modified additive are added, the modified castor oil and the modified additive are added, the modified castor oil and the modified additive are added, the modified castor oil and the modified additive are added, the modified castor oil and the modified additive are added, the modified castor oil and the modified additive are added, and the modified castor oil and the modified additive are added, so that the modified castor oil and the modified additive are added, and the modified castor oil and the modified additive are added; the tensile property and the adhesive property of the hot melt adhesive are improved, and meanwhile, the flame retardant property and the high and low temperature resistance of the hot melt adhesive can be improved.

The invention discloses a waterborne epoxy resin coating, a preparation method and application in bridge protection, and belongs to the technical field of coatings. The water-borne epoxy resin coating comprises the following raw material components in parts by weight: 15-25 parts of epoxy composite resin emulsion, 100 parts of emulsified asphalt, 3-5 parts of a curing agent and 6-10 parts of water, wherein the epoxy composite resin emulsion is obtained by carrying out a composite reaction on 30-60 parts by mass of epoxy resin, 2-3 parts by mass of an emulsifier, 6-9 parts by mass of an acrylate composition and 1.4-1.6 parts by mass of a co-stabilizer; the acrylate composition is prepared by prepolymerizing 15 to 16 parts by mass of butyl methacrylate, 10 to 12 parts by mass of 2-isopropenyl aniline, 5 to 7 parts by mass of allyl glycidyl ether and 1 to 1.2 parts by mass of allyl polyhedral oligomeric silsesquioxane and then combining the prepolymerized materials with 1 to 3 parts by mass of acrylic acid.

The invention discloses a PROTACs compound for targeted degradation of PRMT5 and application of the PROTACs compound. The PROTACs compound comprises a compound as shown in the following formula, and related analogues or pharmaceutically acceptable salts, metabolites or prodrugs of the compound: in the # imgabs0 # formula, X represents a ligand bound to PRMT5 protein, Z represents a ligand of E3 ubiquitin ligase, and Y represents a linking group for linking X and Z; according to the invention, CRBN is used as E3 ligase, and a series of PRMT5-targeted PROTAC degradation compounds are designed and synthesized. The compound can effectively induce PRMT5 degradation, significantly inhibit proliferation, growth, migration, infiltration, clone formation and metastasis of tumor cells, promote apoptosis of cancer cells, promote autophagy of the tumor cells, prevent or overcome drug resistance of BTK inhibitors and / or prolong the lifetime of tumor patients, and has wide application prospects.

The invention discloses a preparation method of a flame-retardant anti-aging polyolefin plastic, and belongs to the technical field of polyolefin material processing.The preparation method comprises the steps that a modified anti-aging agent is mixed with a DOPO-based flame retardant modified by introducing isocyanate and epoxy groups, the mixture is added into a polyolefin material, during combustion, carbon formation is promoted by the phosphorus element, and the flame-retardant anti-aging polyolefin plastic is obtained. The flame retardant and nitrogen element synergistically play a flame-retardant role, meanwhile, epoxy groups in the flame retardant and carboxyl of polypropylene are subjected to a ring-opening reaction, the crosslinking degree of the material is enhanced, the modified anti-aging agent can effectively capture free radicals and inhibit oxidative degradation, and the mechanical strength and flame-retardant effect of the material are improved. According to the modification method, the anti-aging, high-temperature-resistant and flame-retardant properties of the polyolefin plastic are remarkably improved, the stability of the polyolefin plastic in high-temperature and severe environments is enhanced, the service life is prolonged, and the mechanical property and the thermal stability of the polyolefin plastic are improved.

The invention belongs to the technical field of packaging adhesive films for photovoltaic modules, and particularly relates to a water-blocking and oxygen-blocking adhesive film for photovoltaic module packaging and a preparation method of the water-blocking and oxygen-blocking adhesive film for photovoltaic module packaging, and the water-blocking and oxygen-blocking adhesive film comprises a water-blocking layer and an oxygen-blocking layer which are adjacent to each other through co-extrusion; wherein the waterproof layer is prepared from the following materials in parts by mass: 100 parts of grafted polyolefin resin, 0.05 to 0.5 part of alkaline nano oxide and 0.1 to 1 part of antioxidant; the oxygen barrier layer is prepared from the following materials in parts by mass: 100 parts of oxygen barrier resin, 0.1-1 part of an oxygen absorbent, 0.1-1 part of a silane coupling agent and 0.05-0.5 part of a light conversion agent; the oxygen-resistant resin comprises any one or a combination of more of PS (polystyrene), PE (polyethylene), PET (polyethylene terephthalate), PB (polybutylene), PP (polypropylene), PVC (polyvinyl chloride), PVDC (polyvinyl dichloride), PA6 (polyamide 6) and EVOH (ethylene-vinyl alcohol).

The invention discloses a polyurethane-based solid electrolyte as well as a preparation method and application thereof. The polyurethane-based solid electrolyte comprises a metal organic framework three-dimensional skeleton film and a composite polyurethane layer attached to the surface of the metal organic framework three-dimensional skeleton film, the metal organic framework three-dimensional framework film is metal organic framework modified glass fiber cloth; the composite polyurethane layer comprises polyurethane and metal organic framework particles embedded in a macromolecular network of the polyurethane in situ; a carbamate group of polyurethane and a three-dimensional skeleton of the metal organic framework form a hydrogen-bond interaction, so that the ion transmission performance and the mechanical performance are synergistically improved. The polyurethane-based solid electrolyte provided by the invention can promote lithium salt dissociation, inhibit anion migration, improve the ionic conductivity and the ionic transference number, and improve the charge-discharge stability; a large number of repetitive unit carbamate groups in polyurethane and a three-dimensional skeleton form hydrogen-bond interaction to synergistically promote rapid transmission of lithium ions, so that the transference number of the polymer electrolyte is increased, and the ion transmission performance and the mechanical performance are improved.

The invention provides a platinum-based alloy catalyst, a preparation method thereof and a fuel cell. The method comprises the following steps: carrying out reduced pressure ball milling treatment on a non-metallic element doped carrier material, a platinum-based precursor and a transition metal-based precursor to obtain a platinum-based alloy catalyst precursor material; and carrying out reduction calcination treatment on the platinum-based alloy catalyst precursor material to obtain the platinum-based alloy catalyst. According to the preparation method, the platinum-based alloy catalyst with controllable particle size, good oxygen reduction reaction (ORR) performance and stability can be prepared without using an organic solvent by adopting a method of combining reduced pressure ball milling and reduction calcination treatment.

The invention discloses a method for improving the efficiency of a perovskite solar cell, and belongs to the technical field of solar cells. The insulating spacer film prepared between the electron transport layer and the perovskite layer of the perovskite solar cell by adopting the electron beam evaporation method has high uniformity, the cell interface structure can be optimized, defects are reduced, charge recombination loss is reduced, and the photoelectric conversion efficiency and stability are effectively improved. The insulating spacer layer not only can block external moisture and pollutants, reduce direct contact between the perovskite layer and the electron transport layer and prolong the service life of the cell, but also can inhibit internal ion migration and slow down performance degradation. By accurately regulating and controlling the thickness of the insulating spacer layer, charge transmission optimization and compound loss minimization are realized. An innovative technical path is provided for research and development of efficient and stable perovskite solar cells, and further development of the solar cell technology is expected to be promoted.

The embodiment of the invention provides a perovskite solar cell and a preparation method and application thereof. The perovskite solar cell comprises a perovskite absorption layer and a vulcanization layer which are arranged in a stacked mode. The material of the vulcanization layer comprises a sulfonium salt organic matter, wherein cations of the sulfonium salt organic matter have a structure as shown in a formula (I). The material of the sulfide layer in the perovskite solar cell is the sulfonium salt organic matter, on one hand, the sulfonium salt organic matter is combined with the surface of perovskite, the stable sulfide layer is formed between the perovskite absorption layer and the carrier transport layer, ion defects are reduced, ion migration is effectively prevented, and the performance and stability of a device are improved; on the other hand, the hydrophobic group of the sulfonium salt organic matter can improve the hydrophobicity of the surface of the perovskite absorption layer, and the moisture resistance of the cell is improved.

The invention discloses a whitening nano-emulsion and a preparation method thereof, and relates to the technical field of cosmetics and skin care products. The whitening nano-emulsion is prepared from the following components in percentage by weight: 2.0 to 10.0 percent of an emulsifying agent, 4.0 to 10.0 percent of an emollient, 3.0 to 8.0 percent of glycerol, 3.0 to 8.0 percent of butanediol, 0.5 to 3.0 percent of nicotinamide, 1.0 to 3.0 percent of a Soulixian extract, 0.5 to 3.0 percent of ascorbyl tetraisopalmitate, 0.3 to 3.0 percent of hydrogenated lecithin, 0.1 to 2.0 percent of hydroxyethyl piperazine ethanesulfonic acid, 0.1 to 1.0 percent of SymSitive1609, 0.03 to 0.5 percent of a mulberry root extract, 0.03 to 1.0 percent of cerium oxide and the balance of water. The toothpaste is prepared from the following components in percentage by weight: 0.05 to 0.5 percent of tocopheryl acetate, 0.03 to 0.3 percent of stearyl glycyrrhetinic acid ester, 0.01 to 0.1 percent of poly gamma-sodium glutamate, 0.03 to 0.2 percent of EDTA (Ethylene Diamine Tetraacetic Acid) disodium, 0.2 to 1.0 percent of preservative, 0.01 to 0.1 percent of aromatic and the balance of water, wherein the total The prepared whitening nano-emulsion can solve the problems of excessive addition, difficult absorption and instability of active ingredients of cosmetics, can inhibit DPPH free radical activity, hydroxyl free radical activity and tyrosinase activity through the synergistic effect of all the components, achieves the effects of resisting oxidation, whitening, removing freckles, brightening skin and the like, and does not cause damage to the skin.

The invention relates to the technical field of molecular biology diagnosis, in particular to application of an FIBCD1 marker. The invention provides an application of a substance for inhibiting expression of an FIBCD1 marker in preparation of a medicine for preventing and / or treating breast cancer complicated with diabetes mellitus. The invention also discloses application of a reagent for detecting expression of the FIBCD1 marker in preparation of a kit for diagnosis and / or prognosis evaluation of breast cancer combined with diabetes mellitus. According to the application, a novel cancer-promoting regulation molecule FIBCD1 is found, and through experimental analysis, the FIBCD1 is abnormally highly expressed in focus tissues of a BC-DM patient and is positively correlated with the fasting blood-glucose value of the patient, so that a novel target is provided for precise prevention and treatment and targeted intervention of the unique breast cancer subtype BC-DM.

The invention relates to the field of concrete additives, in particular to a heat-resistant anti-freezing water-based permeable inorganic waterproof agent as well as a preparation method and application thereof. The invention discloses a heat-resistant and anti-freezing water-based permeable inorganic waterproof agent which is prepared from the following raw materials in parts by mass: 55-70 parts of active potassium silicate, 10-12 parts of Portland cement, 10-20 parts of modified silicon dioxide, 5-10 parts of a filling agent, 2-4 parts of a coupling agent, 0.5-1.5 parts of a catalyst, 3-8 parts of a dispersing agent, 1.5-3 parts of a stabilizer and 30-50 parts of deionized water. The inorganic waterproof agent prepared by the invention not only has excellent waterproof performance, but also can effectively improve the corrosion resistance, aging resistance, stability and the like of concrete at the same time, can meet the construction requirements of existing deep operation, has very excellent comprehensive performance, and has very excellent application prospects.

The invention discloses a membrane electrode, a preparation method thereof and a fuel cell, the membrane electrode comprises a catalyst layer and a proton exchange membrane, the catalyst layer comprises an anode catalyst layer and a cathode catalyst layer, and the anode catalyst layer and the cathode catalyst layer are respectively arranged on two sides of the proton exchange membrane; the catalyst layer and the proton exchange membrane are both doped with phosphoric acid. By macroscopically regulating and controlling the PA content of the catalyst layer and the proton exchange membrane in the membrane electrode, more three-phase reaction interfaces are constructed, so that the Pt catalyst can be fully utilized, and unnecessary migration of PA is reduced, thereby avoiding the phenomenon of acid flooding, ensuring sufficient PA in the proton exchange membrane to provide sufficient proton conductivity, and improving the proton exchange efficiency. And the power density of the fuel cell is further improved.

The invention discloses concrete with high salt corrosion resistance and a preparation method of the concrete. The concrete is prepared from 300-400 kg / m < 3 > of cement, 50-150 kg / m < 3 > of slag powder, 1000-1200 kg / m < 3 > of gravel, 650-800 kg / m < 3 > of machine-made sand, 0.5-2 kg / m < 3 > of a modified polycarboxylic acid water reducing agent, 0.005-0.01 kg / m < 3 > of an air entraining agent, 0.05-0.1 kg / m < 3 > of an ion chelating agent, 0.05-0.1 kg / m < 3 > of polyacrylamide, 0.01-0.05 kg / m < 3 > of sodium methyl silicate, 0.1-0.5 kg / m < 3 > of multiwalled carbon nanotube dispersion liquid and 140-160 kg / m < 3 > of water. The preparation method comprises the following steps: stirring and mixing the modified polycarboxylate superplasticizer, the air entraining agent, the ion chelating agent, the polyacrylamide, the sodium methyl silicate and part of the water for mixing to obtain an admixture mixed solution; sequentially putting broken stones, cement, machine-made sand, the admixture mixed solution, the multi-walled carbon nanotube dispersion liquid and the rest of mixing water into a stirrer, and stirring for 2-3 minutes, so as to obtain the concrete with high salt corrosion resistance. The concrete has high salt corrosion resistance in a complex service environment, the service life of a concrete structure is effectively prolonged, and a reliable guarantee is provided for infrastructure construction.

The invention relates to the technical field of high polymer materials, and particularly discloses a nuclear-grade cable for spent fuel aftertreatment and a preparation method of the nuclear-grade cable. Comprising the following steps: S1, taking hydroxyl-containing cyclotriphosphazene, tetra (4-hydroxybenzene) ethylene, oleic acid acyl chloride, guar gum hydroxypropyl trimethyl ammonium chloride, triethylamine and a mixed solvent, cooling, dropwise adding triethylamine in a nitrogen atmosphere, dropwise adding a phenoxyphosphoryl dichloride solution, stirring for reaction, filtering, and performing rotary evaporation to obtain a composite flame retardant; s2, polyethylene, aluminum hydroxide, a composite flame retardant and an anti-radiation agent are added into an internal mixer for mixing, a cross-linking agent is added, uniform mixing, extrusion and granulation are performed, and a cable material is obtained; the cable material is used for preparing an outer sheath layer of a nuclear-grade cable. S3, twisting a plurality of copper metal monofilaments to form a conductor, wrapping the conductor with an insulating layer, and wrapping the conductor with a polyimide film to form a wire core; a plurality of wire cores are twisted to form a cable core; a non-woven fabric wrapping tape layer and an outer sheath layer are wrapped outside the cable core; and obtaining the nuclear-grade cable.

The invention discloses markers for diagnosing and treating tumors. It is found for the first time that overexpressed circRNABP9 can inhibit proliferation, migration and invasion of gastric cancer cells and promote aging of the gastric cancer cells; the circTMEM45A can inhibit proliferation, migration and invasion of esophageal cancer cells, and further through mouse transplantation tumor experiment verification, a new thought and direction are provided for diagnosis and treatment of gastric cancer and esophageal cancer, and the circTMEM45A has a wide application prospect.

The invention belongs to the technical field of perovskite solar cell interface modification, and particularly provides a perovskite passivation material, a passivation unit and a perovskite cell. The perovskite passivation material provided by the invention comprises a vinyl thiophene compound. According to the invention, the perovskite layer is passivated and modified through the vinyl thiophene compound, and the passivation layer has a good passivation effect and effectively passivates defects in the perovskite layer; and high stability is achieved, the long-term effectiveness of the passivation layer is guaranteed, and the passivation effect can be stably kept for a long time. The passivation layer can greatly improve the photoelectric conversion efficiency of the device, and provides powerful support for the development of the fields of perovskite solar cells and the like.

The invention belongs to the field of organic electroluminescence, and provides a metal iridium complex, a preparation method thereof and an organic electroluminescent device. The structural general formula of the metal iridium complex is shown in the specification. The metal iridium complex provided by the invention has the advantages of low evaporation temperature, high photo-electrochemical stability, high luminous efficiency, long device life and the like, the preparation method provided by the invention is simple in process, the prepared product is high in purity and suitable for industrial production, and the problem that the luminous efficiency of an existing luminous material is insufficient is solved.

The invention discloses a perovskite solar cell with an organic polymer molecule modified perovskite layer, and belongs to the technical field of photovoltaic solar materials. The structure of the device sequentially comprises a conductive glass layer, a hole transport layer, a perovskite layer, a perovskite modification layer, an electron transport layer and a metal electrode layer from bottom to top. The structural formula of the perovskite layer is FAxMAyPbI3, x ranges from 0.7 to 0.9, y ranges from 0.1 to 0.3, and the perovskite modified layer comprises linear polyethyleneimine. The linear polyethyleneimine has a molecular structure as shown in a formula (1). Hydroxyl in linear polyethyleneimine can be used as a Lewis base to interact with uncoordinated Pb < 2 + > on the grain boundary and the surface of perovskite, so that the lead ion defect can be effectively passivated; the secondary amine group can form a hydrogen bond with unsaturated I <-> to inhibit ion migration, and meanwhile, linear polyethyleneimine protects a perovskite layer from being influenced by water molecules through a hydrophobic long alkyl chain, so that the photoelectric conversion efficiency and stability of the perovskite solar cell are improved. # imgabs0 #

The invention relates to the field of photovoltaic adhesive films, and discloses an anti-migration long-service-life light conversion adhesive film and a preparation method and application thereof.The anti-migration long-service-life light conversion adhesive film comprises a light conversion layer, an anti-migration layer and a UV cut-off layer which are sequentially arranged in an attached mode; the raw materials of the light conversion layer comprise first matrix resin and a light conversion agent; the raw materials of the anti-migration layer comprise second matrix resin and inorganic nano powder; the particle size D50 of the inorganic nano powder is 1-200nm, and the mass of the inorganic nano powder is 0.01-0.5% of the total mass of the anti-migration layer; the anti-migration layer is pre-crosslinked through electron beam irradiation; the raw materials of the UV cut-off layer comprise third matrix resin and an ultraviolet absorbent. The anti-migration layer added with the inorganic nano powder and pre-crosslinked through electron beam irradiation is arranged between the light conversion layer and the UV cut-off layer, the free volume of a crosslinked polymer can be effectively reduced by adding the inorganic nano powder and carrying out electron beam irradiation pre-crosslinking, and a migration channel of an auxiliary agent is blocked; mutual migration of the light conversion agent and the ultraviolet absorbent is effectively prevented.

The invention discloses a synthesis method and application of a special dispersant for polar rubber carbon black, and relates to the technical field of rubber auxiliary materials. The synthesis method of the special dispersant for polar rubber carbon black comprises the following steps: in an inert protective gas atmosphere, carrying out heat preservation reaction on polyether amine, absolute ethyl alcohol and an acrylate monomer to obtain an intermediate I; in an inert protective gas atmosphere, carrying out heat preservation reaction on the intermediate I, a catalyst I and fatty diacid to obtain an intermediate II; and in an inert protective gas atmosphere, carrying out heat preservation reaction on the intermediate II, a catalyst II and fatty monoacid to obtain the special dispersing agent for the carbon black for the polar rubber. The prepared special dispersant for polar rubber carbon black has good precipitation resistance in polar rubber such as nitrile rubber, and can uniformly disperse the carbon black and improve the mechanical properties and apparent properties of the rubber.

The invention discloses a wide-band-gap perovskite solar cell and a preparation method thereof, and belongs to the technical field of new energy, the method comprises the following steps: 1) spin-coating a NiOx solution on a pretreated substrate, and drying to obtain a NiOx hole transport layer; 2) mixing FAI, CsI, PbBr2 and PbI2, dissolving the mixture in a mixed solution of DMF and DMSO, and then adding 4, 5-dicyanoimidazole to obtain a perovskite precursor solution; the NiOx hole transport layer obtained in the step 1) is coated with a perovskite precursor solution through a two-step spin-coating method, and a perovskite layer is obtained after annealing treatment; and 3) successively preparing an electron transport layer and an electrode layer to obtain the wide-band-gap perovskite solar cell. By providing a 4, 5-dicyanoimidazole additive strategy, the strong coordination effect between 4, 5-dicyanoimidazole and iodide ions effectively inhibits the precipitation of iodine, thereby significantly improving the stability of the wide-band-gap solar cell.

The invention relates to the field of earmuff products, in particular to a high-flexibility attached earmuff and a preparation method thereof. The high-flexibility attached earmuff structurally comprises an outer protection layer located at the top, a sound absorption layer located in the middle and a flexible layer located at the bottom. The flexible layer is prepared from the following raw materials in parts by mass: 30 to 40 parts of polyether polyol, 20 to 30 parts of polyisocyanate, 5 to 10 parts of a foaming agent, 1 to 2 parts of a catalyst, 1 to 2 parts of a stabilizer, 3 to 5 parts of a flame retardant, 1 to 2 parts of an antioxidant and 5 to 15 parts of a filling agent. The earmuff product prepared by the invention not only has an excellent sound insulation effect, but also can effectively ensure that the earmuff product has good moisture resistance, water resistance, aging resistance, mechanical quality and other properties, and is especially suitable for environments requiring long-time wearing, such as the fields of music production, industrial operation and the like.

The invention discloses a sulfide composite electrolyte as well as a preparation method and application thereof, and relates to the technical field of solid-state batteries, an organic coating agent and an organic solvent are mixed, oxide nanoparticles are dispersed in the mixture, a precipitate is extracted and dried to obtain an oxide-organic coating agent composite material, then the oxide-organic coating agent composite material is subjected to ball milling treatment in the sulfide electrolyte, and the sulfide composite electrolyte is obtained. The sulfide composite electrolyte solves the problems of lithium dendrites and self discharge existing in a sulfide all-solid-state battery, the prepared sulfide composite electrolyte can smoothly transmit lithium ions, meanwhile, electron transfer between sulfide electrolyte interfaces is blocked, the electron conductivity is reduced, and the service life of the sulfide all-solid-state battery is prolonged. The growth of lithium dendrites along gaps of sulfide electrolyte is favorably inhibited, and the problem of lithium dendrites in a solid-state battery can be reduced. The preparation method provided by the invention is simple in process, low in equipment requirement and easy to amplify.

The invention relates to a method for improving particles generated between an epitaxial cavity and an exchange cavity, and the method is characterized in that the method comprises the following stages: S100, in the first stage, removing oxides, raising the temperature in the epitaxial cavity to a preset temperature, and introducing hydrogen to remove the oxides on the surface of silicon; s200, second-stage impurity dissolution: introducing hydrogen chloride gas into the epitaxial cavity to dissolve metal impurities and part of impurities in the cavity; s300, performing third-stage cleaning, filling hydrogen into the epitaxial cavity, performing air exhaust treatment on the epitaxial cavity through a tail gas treatment device, removing reactants and impurities in the cavity, monitoring the pressure in the epitaxial cavity in real time, adjusting the air exhaust rate by using an air pump, ensuring that the pressure in the epitaxial cavity reaches 1.2 times of the pressure of an exchange cavity, preventing particles from migrating, and performing third-stage cleaning; and a gradual heating mode is adopted, so that oxides on the surface of the silicon wafer are completely removed, thermal stress is controlled within a preset range, and particle generation caused by temperature difference is avoided.

The invention discloses a preparation method of a water-based coating for antistatic treatment of a flexible PVC (polyvinyl chloride) material, belongs to the technical field of antistatic coating processing, and aims to solve the technical problem that the flexibility, conductivity and conductive stability of a water-based coating film in the prior art need to be further improved. The preparation method comprises the following steps: adding polyacrylate into a polyurethane emulsion, stirring, adding a sodium hydroxide solution into a reaction system, adjusting the pH value of the system to 8-9, raising the temperature of the reaction system to 70-80 DEG C, carrying out heat preservation and stirring for 90-120 minutes, and carrying out post-treatment to obtain composite polyurethane; the graphene oxide is modified and then mixed with the polyacrylate reinforced composite polyurethane material, so that the antistatic property, flexibility and adhesiveness of the water-based paint are effectively improved, the water-based paint has good washing migration resistance, and the conductive stability of the water-based paint is improved.

The invention discloses a graphene active carbon-based material loaded low-platinum catalyst as well as a preparation method and application thereof, and belongs to the field of proton exchange membrane fuel cell cathode catalytic materials. The method comprises the following steps: firstly preparing a transition metal Co (at) ZIF-8 / G precursor, then carrying out high-temperature calcination to form a Co-N-C-G catalyst, taking the Co-N-C-G catalyst as an active carbon carrier, and reducing Pt salt by using polyol to enable Pt particles to be uniformly loaded on Co-N-C-G to obtain the Pt / Co-N-C-G catalyst. The low-platinum supported catalyst Pt / Co-N-C-G which is good in dispersity, high in activity and high in stability is finally prepared by optimizing the shape and the structure of the carrier, taking the supporting effect of the carrier as the basis and regulating and controlling the Pt-based metal nanoparticles by enhancing the interaction between the Pt nanoparticles and the carbon carrier. The preparation cost of the fuel cell cathode catalyst can be effectively reduced, and the method has important significance on innovative development and commercial application of fuel cells.

The invention relates to a molecular sieve catalyst as well as a preparation method and application thereof, and the preparation method of the molecular sieve catalyst comprises the following steps: (1) obtaining an all-silicon Silicate-1 molecular sieve; (2) preparing the molecular sieve catalyst: S1, uniformly mixing an all-silicon Silicate-1 molecular sieve with a silicon source, alkali, a template agent, water, a Pt source and an auxiliary agent, and aging under a negative pressure condition; s2, heating under a microwave induction condition for crystallization, and then washing, drying and roasting to obtain the molecular sieve catalyst. The prepared catalyst shows excellent stability and carbon deposition resistance and higher propylene product selectivity in a reaction for preparing propylene through propane dehydrogenation, and the catalyst is beneficial for prolonging the operation cycle of a device and reducing the unit consumption of the reaction.

The invention provides a method for preparing a composite solid electrolyte through a Lewis fluorine supply nano additive, and the composite solid electrolyte comprises the following components in parts by weight: 10-20 parts of a polymeric monomer, 2-6 parts of a lithium salt, 1-4 parts of a nano functional additive and 5-12 parts of an organic solvent. When the prepared composite solid electrolyte is used for a lithium ion battery, the composite solid electrolyte has the characteristics of no need of an additional initiator, uniform polymerization reaction, high ionic conductivity and the like, and the stability, the rate and the cycle performance of the semi-solid lithium ion battery can be improved; according to the preparation method, no extra initiator is added into the preparation raw materials of the in-situ cured solid electrolyte, the lithium salt is instably decomposed into the lewis acid in a heating state, the lewis acid is utilized to efficiently initiate ring-opening of cyclic ether to perform polymerization reaction, no initiator is left, and no extra side reaction is generated to cause reduction of battery performance.