140results about How to "Inhibit aggregation" patented technology

The invention discloses a hydrogel scaffold with multiple physical gradients. The hydrogel scaffold is prepared from the following synthetic raw materials: thermo-sensitive polyisocyanide polypeptide, silk nanofibers rich in beta lamellar structures and a conductive nanomaterial. The conductive nano material dispersion liquid and the BSNF solution are uniformly mixed according to a ratio of 1: 4; at 4 DEG C, adding a BSNF-loaded conductive nano material mixture into a PIC aqueous solution, uniformly mixing, adding into a square tank with an electrode, and applying a direct-current electric field to the hydrogel; after the electric field is removed, the temperature is raised to 25 DEG C, PIC is induced to form gel, and the conductive hydrogel stent with multiple physical gradients is obtained. The hydrogel contains multiple physical gradient structures such as rigidity, conductivity and morphology. The multi-gradient hydrogel with different patterns can be constructed by regulating and controlling the shape, the position and the electric field applying time of the electrode; the preparation method disclosed by the invention is simple, convenient to operate, simple in equipment and process requirements, low in cost and capable of realizing large-scale industrial production.

The invention belongs to the technical field of smoke dust purification, and particularly relates to a purification workshop with multiple purification functions, the purification workshop comprises a telescopic arm, the telescopic arm is connected with a purification box, and the bottom of the purification box is communicated with a dust collection cover; a smoke dust purification mechanism is arranged in the purification box, a metal filter screen cylinder is installed in the purification box, an electromagnetic suction strip is arranged on the cylinder wall of the metal filter screen cylinder, a dust filter screen cylinder is inserted into the metal filter screen cylinder in a sealed mode, the cylinder wall of the metal filter screen cylinder and the cylinder wall of the dust filter screen cylinder are installed in a non-contact mode, and a filter element is arranged in the dust filter screen cylinder. The top of the purification box communicates with a dust suction pipe, and a pipe opening of the dust suction pipe is aligned with a barrel opening of the dust filter screen barrel; according to the smoke dust collecting and purifying device, smoke dust generated by welding can be collected and purified in a short-distance and concentrated mode, the situation that the collected smoke dust flows in a pipeline for a too long time, and consequently the pipeline is blocked is avoided, and the phenomenon that energy is wasted due to the fact that the smoke dust generated by welding in a welding workshop is dispersed can be reduced.

The invention discloses a preparation method of a self-supporting carbon nanofiber loaded high-spinning Fe monatomic catalyst and application of the self-supporting carbon nanofiber loaded high-spinning Fe monatomic catalyst in a flexible zinc air battery, and the self-supporting carbon nanofiber loaded high-spinning Fe monatomic catalyst (Fe-N4 / NGC-C) is prepared by using an electrostatic spinning technology in combination with a high-temperature pyrolysis strategy; the carbon nanofiber has the advantages of high length-width ratio, large specific surface area, strong stability and the like, can realize uniform distribution of metal Fe monatomic, and inhibits aggregation of electrocatalytic active sites in the carbonization process. According to the preparation method, the atom utilization rate and the conductivity can be improved, and low load and high catalytic performance are realized.

A preparation method of a magnetic metal nanoparticle-loaded nitrogen-doped wood carbon aerogel wave-absorbing material comprises the following steps: step 1, delignification is performed on cut natural wood, and then freeze drying is performed to obtain delignified wood aerogel; 2, the delignification wood aerogel and a metal adenine solution are subjected to a reaction in a reaction kettle, then freeze drying is conducted, and wood aerogel loaded with a metal adenine complex is obtained; 3, the wood aerogel loaded with the metal adenine complex is subjected to high-temperature carbonization treatment in inert gas, and the nitrogen-doped wood carbon aerogel wave-absorbing material loaded with the magnetic metal nanoparticles is obtained. According to the method, natural wood with a directional multilevel pore channel structure is used as a raw material, and a metal-organic complex grows in situ in a pore channel of the wood through solvothermal reaction. The invention aims to realize uniform dispersion and loading of magnetic nanoparticles in a wood carbon-based material so as to solve the problems of non-uniform structure, complex processing procedures and the like in the preparation process of the wave-absorbing material.

The invention discloses a stable oncolytic adenovirus composition, which contains adenovirus or recombinant oncolytic adenovirus modified based on the adenovirus, and also contains a nonionic surfactant (virus stabilizer), a cryoprotectant, an osmotic pressure regulator and a buffer substance. The composition can still keep stable activity in low-temperature storage (lower than-70 DEG C), cold-chain transportation, repeated freezing and thawing and temporary storage at room temperature (10-30 DEG C). The invention also relates to application of the composition in medicine.

The invention discloses a natto peptide sea cucumber polysaccharide liposome for synergistically improving cardiovascular health and a preparation method and application thereof, belongs to the field of active peptide delivery systems, and aims to solve the stability problem of natto oligopeptide in gastrointestinal digestive tracts. The phytosterol and the vitamin E are filled between phospholipid double layers of the liposome to support a gap between the phospholipid double layers, and the ratio of the phytosterol to the vitamin E is (1-3): 1, so that the natto oligopeptide liposome has the effects that the storage of the natto oligopeptide and the stability of the natto oligopeptide in gastrointestinal and digestive tracts can be improved, the bioavailability of the natto oligopeptide liposome is improved, and the bioavailability of the natto oligopeptide liposome is improved. The traditional Chinese medicine composition has synergistic effects in the aspects of anticoagulation, thrombolysis and blood fat reduction, and has a good cardiovascular protection effect.

The invention relates to the technical field of chemical production, and discloses a continuous production process and a production system of paraformaldehyde. The continuous production process of the paraformaldehyde comprises the following steps: feeding a low-concentration formaldehyde aqueous solution into a formaldehyde concentration tower for reduced-pressure flash evaporation to obtain a high-concentration formaldehyde aqueous solution; pumping the obtained high-concentration formaldehyde aqueous solution into a spray granulation tower for spray granulation to prepare a paraformaldehyde material; and feeding the obtained paraformaldehyde material into a fluidized bed dryer for fluidized drying to obtain a paraformaldehyde product. By adopting a specific combination mode of flash evaporation, spray drying and fluidized drying, the polymerization degree of the prepared paraformaldehyde product is 9-11, and the purity can reach 92-96 wt%. And in cooperation with heat preservation and flow rate control, the polymerization problem caused by too high local concentration of formaldehyde can be effectively avoided, and the continuous production mode can be well met.

The utility model provides a water treatment agent mixing device, which belongs to the technical field of environmental governance, aims to solve the problem that during agent adding, after agents uniformly enter a stirring barrel body from an agent adding opening, the agents are extremely easy to agglomerate due to the fact that the agents are gathered below the agent adding opening, and comprises the stirring barrel body, the dosing hopper is fixedly connected to the outer side of the top end surface of the stirring barrel body; the distributing screen is arranged on the upper side of the inner end of the stirring barrel body in a reciprocating sliding manner; the stirring paddle is arranged on the lower side of the inner end of the stirring barrel body; the defoaming auxiliary net is concentrically and fixedly connected to the outer side of the top end surface of the stirring paddle; the stirring auxiliary mechanism is arranged between the stirring barrel body and the stirring paddle; the material distribution auxiliary mechanism is arranged between the guide auxiliary shaft and the material distribution screen; according to the chemical dosing device, the phenomenon that chemicals are gathered below the chemical dosing hopper and the phenomenon that the chemicals are agglomerated are avoided, the mixing efficiency of the chemicals and sewage is improved, and the reaction time of the chemicals and the sewage is shortened.

The invention discloses a coating material for resisting hydrogen embrittlement in a high-temperature environment and a preparation method of the coating material, diffusion and aggregation of hydrogen atoms are effectively inhibited through a multi-layer structural design, and crack propagation and mechanical property deterioration caused by hydrogen embrittlement in the high-temperature environment are remarkably reduced. According to the coating, under the synergistic effect of the composite ceramic layer, the rare earth doping layer and the metal matrix and oxide composite layer, the hydrogen permeation resistance is greatly enhanced, the oxidation resistance and the fatigue resistance are improved, internal stress accumulation is remarkably reduced, and coating falling and structure cracking are effectively prevented. The coating material can provide more reliable long-term stability and mechanical performance under harsh conditions of high temperature, high pressure, corrosive gas and frequent thermal circulation, greatly prolongs the service life of equipment, reduces the maintenance cost, and effectively improves the safety and reliability of operation.

The invention discloses a backwashing device for a generator filter, and belongs to the technical field of filtering equipment. The filter shell is provided with a water inlet pipe and a water outlet pipe; the filtering assembly comprises a rotatable filtering cylinder, the upper end and the lower end of the filtering cylinder are in sliding connection with the inner wall of the filter shell, the filtering cylinder can rotate around the axis of the filtering cylinder, a sewage cavity communicated with the water inlet pipe is formed in the filtering cylinder, and a purified water cavity communicated with the water outlet pipe is formed by the filtering cylinder and the inner wall of the filter shell; the flushing unit comprises a water spraying pipe, the two ends of the water spraying pipe are fixedly connected with the inner wall of the filter shell respectively, a nozzle opposite to the outer wall of the filter cartridge is arranged on the water spraying pipe, and an inner cavity of the water spraying pipe is communicated with a water source through a pipeline. The filter can be backwashed, and the cleaning effect is good.

The invention belongs to the field of medicines, and particularly relates to application of odd-carbon saturated medium and long-chain fatty acid in preparation of a medicine for treating polyglutamine diseases. Research results of the invention show that the heptadecanoic acid can significantly delay and inhibit the aggregation of polyglutamine (polyQ) disease proteins, and can significantly prolong the survival time of AM141 nematodes at the same time, and the prolonging effect is about 10%. Therefore, the heptadecanoic acid is completely possible to be used as a raw material to prepare related medicines, so as to treat polyQ diseases. In addition, the heptadecanoic acid is clear in component, low in price and easy to obtain, and is more beneficial to benefiting the public.

The invention provides a nano material for a cutter and a preparation method and a product of the nano material, and relates to the technical field of metal materials. The nanometer material is prepared from the following raw material components in parts by weight: 60 to 80 parts of graphene, 10 to 25 parts of nanometer magnesia powder, 10 to 20 parts of nanometer cobalt powder, 5 to 10 parts of lanthanum oxide, 10 to 20 parts of yttrium oxide, 20 to 35 parts of chromium carbide, 20 to 35 parts of a ball milling regulator, 5 to 15 parts of iron powder, 1 to 3 parts of calcium sulfide and 0.5 to 1.5 parts of boron powder. The average particle size of the chromium carbide is 20-50nm. All the components are dispersed and then subjected to intermittent ball milling treatment to obtain the nanometer material, the nanometer material is used for preparing the cutter by controlling the sintering temperature, the heating rate and the time and adopting a gradient heating and gradient cooling method, so that the internal structure of the cutter is more uniform, and the mechanical property is remarkably improved.

The invention discloses a four-step-in-one negative pressure oil-carrying shutdown method for a styrene dehydrogenation reaction system, and relates to the technical field of styrene dehydrogenation. A negative-pressure steam oil-carrying mode is adopted for the first time, after feeding of the dehydrogenation reaction system is cut off, operation of a tail gas compressor is still maintained, the normal negative-pressure working condition of the reaction system is maintained, and steam oil-carrying under the negative-pressure working condition is carried out; after oil carrying is finished, the tail gas compressor still keeps running, the pressure is gradually increased to micro-positive pressure, and catalyst scorching is conducted; and after scorching is finished, the tail gas compressor is still maintained to operate in the steam cooling and nitrogen cooling processes until nitrogen cooling is finished, the tail gas compressor is stopped, and meanwhile multiple times of starting and stopping of the tail gas compressor are optimized into one-time stopping operation in the stages of steam oil carrying, catalyst scorching, steam cooling and nitrogen circulating cooling. One-time shutdown operation of the tail gas compressor is achieved through negative pressure shutdown, the shutdown operation step sequence of the reaction system is greatly simplified, and the shutdown disposal difficulty of the dehydrogenation reaction system is reduced.

The present invention discloses a highly breathable super absorbent diaper pad and a preparation method thereof, which belongs to the technical field of diaper pads, and comprises a protective layer, an absorption layer and an anti-reverse osmosis layer from top to bottom, wherein the protective layer is composed of antibacterial modified soybean protein viscose fiber, polyester fiber and ES fiber, the absorption layer is composed of super absorbent fiber and antibacterial modified soybean protein viscose fiber, and the anti-reverse osmosis layer is composed of super absorbent fiber and antibacterial modified soybean protein viscose fiber. The present invention adopts a three-layer non-woven fabric structure with gradual changes in pore size, hydrophilicity and disorder, which can accelerate urine absorption and prevent reverse osmosis; the present invention treats soybean protein to improve hydrophilicity, antibacterial property and air permeability, and the amphiphilicity can make urine diffuse and be absorbed faster and adjust water absorption balance; the present invention utilizes mannitol, hexafluorobutyl methacrylate and other ingredients to make the fiber have excellent water absorption, reduce surface energy, and form a network structure with block copolymer and sodium polyacrylate to improve water absorption and air permeability.

The invention discloses a long ether chain thiophene copolymer and a preparation method and application thereof. The long ether chain thiophene copolymer is a copolymer of 3-hexylthiophene and 3-(2-butoxyethyl)thiophene, wherein the molar percentage of the 3-(2-butoxyethyl)thiophene chain segment in the long ether chain thiophene copolymer chain segment is 4.7% to 20%. The insertion rate of 3-(2-butoxyethyl)thiophene in the long ether chain thiophene copolymer is high. The copolymer is applied to a perovskite device, can effectively improve the problem of physical poor contact between P3HT and the perovskite interface, reduce charge recombination in the device, and further effectively improve the photoelectric conversion efficiency of the perovskite solar cell.

This invention discloses a hydrocolloid material containing guaiac, its preparation method, and its application, belonging to the field of medical care materials technology. It includes a backing layer and a hydrocolloid functional layer. The hydrophobic elastomer matrix comprises polyisobutylene, styrene-isoprene-styrene block copolymer, tackifying resin, liquid paraffin, and optionally caprylic / capric triglycerides. The pre-wetted hydrophilic absorbent powder comprises sodium carboxymethyl cellulose, pectin, gelatin, calcium alginate, sodium alginate, and caprylic / capric triglycerides. The composite plant repair oil comprises a phellodendron amurense lipid dispersion, Lithospermum erythrorhizon-Angelica dahurica extract, borage oil, sandalwood seed oil, borneol, and DL-α-tocopherol. The guaiac nanoliposome lyophilized powder is obtained by sequentially coating a guaiac nanoliposome aqueous dispersion with quaternized chitosan and sodium hyaluronate, then adding a lyophilization protectant and freeze-drying. This invention solves the problems of poor dispersion stability, easy degradation, insufficient soothing and repairing ability of guaiac, and instability in oil-water blends.

The invention provides high-stability sesame paste and a preparation method thereof. The preparation method comprises the following steps: cleaning sesame; drying the sesames; roasting the sesame seeds; cooling is performed; grinding, homogenizing and centrifugally separating to obtain sesame oil and a solid phase; taking glycyrrhizin and agave fructan, adding deionized water, stirring and dissolving to obtain a mixed water phase; dispersing glyceryl monocaprate in sesame oil, stirring and dissolving to obtain an oil phase; pouring the mixed water phase into the oil phase, and homogenizing to obtain a compound oil emulsion; adding the edible sugar, the table salt and the compound oil emulsion into the solid phase, and uniformly stirring; and performing low-temperature plasma treatment. The composite oil emulsion is obtained through a simple dispersion and emulsification method, formed emulsion droplets are small and uniform in particle size and compact in gel network structure, synergistic coexistence exists on an oil-water interface, interaction force such as hydrogen bonds exists, sesame oil and a solid phase can be firmly combined, a stable homogeneous system is formed, and the stability of the sesame oil is improved. Therefore, the sesame oil is prevented from gathering and being separated out after being remixed with a solid phase.

The present application relates to waste gas treatment technical field, specifically to a kind of acrylic resin waste gas treatment filter equipment, including main body, the main body inside is equipped with purification cavity, the main body circumferential outer wall is fixedly connected with shunt pipe, the shunt pipe bottom is equipped with several air pipes, the air pipe bottom end is penetrated to the inside of purification cavity;The inside of the purification cavity is provided with purification device, the purification device includes rotation installation in the center position of the inside bottom of purification cavity drive shaft, the inside of the purification cavity is located at the top position of drive shaft and is provided with limit frame, the center position of the limit frame bottom is penetrated and is equipped with docking interface.This application is through gas distribution plate, push plate and filter assembly linkage, to establish gas-liquid mixing neutralization system, improve the neutralization of acidic substances and the absorption efficiency of soluble VOCs, reduce the subsequent pollutant load, push plate, filter assembly and other collaborative impurities, clean filter screen, prevent secondary pollution, prolong the service life of filter material.

The utility model relates to the technical field of decolorizing pots, and discloses a stirring type decolorizing pot which comprises a processing barrel serving as a supporting main body, the left end of the processing barrel is fixedly connected with a fixing box, the left end of the fixing box is fixedly connected with a first motor, and the driving end of the first motor penetrates through the fixing box and is fixedly connected with a rotating rod; fixing rings are fixedly connected to the two sides of the outer wall of the rotating rod, stirring plates are fixedly connected to the outer walls of the fixing rings, and a connecting box is fixedly connected to the left end of the treatment barrel. The first motor drives the rotating rod, the rotating rod drives the fixing ring, the fixing ring drives the stirring plate to stir, the fan is started to blow out air, the blown air is heated by the heating wire, the heated air is conveyed to the rotating block through the connecting pipe, and the rotating block feeds hot air from the air inlet and then discharges the hot air from the air outlet. Therefore, the materials in the pot are driven to flow, and the materials to be decolored and the decoloring agent can be mixed more sufficiently and uniformly.

This invention discloses a polypeptide targeting the NPAT protein and its application in inhibiting tumor cell proliferation, belonging to the field of biomedical technology. The polypeptide provided by this invention was discovered during research on the regulatory mechanism of histone matrix formation, a non-membrane organelle in the cell nucleus. Overexpression of this polypeptide in cells effectively inhibits intracellular NPAT aggregation, thereby inhibiting histone matrix formation and downregulating histone gene expression. Using CCK8 assays and clonogenic assays, it was observed that this polypeptide has a significant inhibitory effect on tumor cell proliferation. The polypeptide of this invention is the amino acid sequence of NPAT protein N-terminus 1-50, which can effectively interfere with the normal function of NPAT in regulating histone transcription and hinder the normal progression of the cell cycle. It has promising applications in the pharmaceutical field and can provide new design ideas for developing drugs to inhibit abnormal tumor cell proliferation.

This application discloses a wide-bandgap perovskite solar cell based on fullerene derivatives, a tandem solar cell, and a method for fabricating the same, belonging to the field of perovskite solar cell technology. A wide-bandgap perovskite solar cell based on fullerene derivatives includes a conductive substrate, a first hole transport layer, a self-assembled monolayer, a wide-bandgap perovskite light-absorbing layer, a fullerene derivative electron transport layer, a first electron modification layer, and a first metal electrode layer, sequentially stacked. The molecular formula of the wide-bandgap perovskite is FA. 0.5‑1.0 Cs 0.1‑ 0.3 PbI 1.5‑2.0 Br 1.0‑1.5 The fullerene derivative is 5'-Phenyl-5'. H -[5,6]fullereno-C 60 - I h -[1,9:2',3']pyrido[3,2- b [indole. Through the synergistic effect of electron transport, defect passivation, and thin film stability enhancement, the optoelectronic performance and long-term operational stability of wide-bandgap perovskite and all-perovskite stacked devices are significantly improved.]

The invention relates to a quench cooler electric decoking device and an electric decoking process, and belongs to the field of petrochemical engineering, the quench cooler electric decoking device comprises a current conversion controller, an input electrode, an output electrode, an input detection electrode, an output detection electrode, a detector and a pulse power supply. The input electrode and the input detection electrode are connected to the inlet end of a furnace tube of the quench cooler, the output electrode and the output detection electrode are connected to the outlet end of the furnace tube of the quench cooler, and the detector is connected with the input detection electrode and the output detection electrode. The current conversion controller loads set voltage and current to the two ends of the quench cooler furnace tube through the input electrode and the output electrode, and an electromagnetic field is formed in the quench cooler furnace tube; the flow direction of the reaction material in the furnace tube of the quench cooler is the same as the flow direction of the current; and the input detection electrode and the output detection electrode are used for detecting voltages at two ends of the furnace tube of the quench cooler in real time. The method improves the decoking effect, is suitable for decoking and oxygen-containing flue gas purification at high temperature, and prolongs the operation cycle of the quench cooler.

The invention provides a composition for improving the thrombolysis capacity of a human body, a preparation method and application thereof.The composition is prepared from, by weight, 5-30 parts of earthworm protein, 30-120 parts of hippophae rhamnoides total flavone extract, 50-150 parts of silymarin extract, 20-80 parts of maltodextrin and 15-60 parts of pregelatinized starch, the earthworm protein activates a fibrinolytic system to promote t-PA to release and dissolve thrombus, and the hippophae rhamnoides total flavone extract activates the fibrinolytic system to promote t-PA to release and dissolve thrombus; the hippophae rhamnoides total flavonoids regulate the ratio of PGI2 / TXA2 to inhibit platelet aggregation and reduce blood fat, the silymarin protects the liver function to enhance LDL-C metabolism clearing, the hippophae rhamnoides total flavonoids, the silymarin and the hippophae rhamnoides total flavonoids cooperate to form a thrombolysis-antithrombosis-metabolism regulation three-dimensional intervention system, a whole-course low-temperature mixing direct tabletting process is adopted

The invention discloses a dichloroethane refining device, which comprises a light component tower (1), a heavy component tower (2), a vacuum recovery tower (3), a first dichloroethane feeding pipeline (10), a second dichloroethane feeding pipeline (30) and a third dichloroethane feeding pipeline (50), and is characterized by further comprising a first polymerization inhibitor supply pipeline (60) for supplying aromatic nitryl polymerization inhibitors, the outlet end is connected with a second dichloroethane feeding pipeline (30); the second polymerization inhibitor supply pipeline (70) is used for supplying an aromatic nitryl polymerization inhibitor, and the outlet end of the second polymerization inhibitor supply pipeline (70) is connected with the third dichloroethane feeding pipeline (50); and the third polymerization inhibitor supply pipeline (80) is used for supplying a phenol polymerization inhibitor, and the outlet end of the third polymerization inhibitor supply pipeline (80) is connected with the vacuum recovery tower (3). The invention also discloses a dichloroethane refining process applying the dichloroethane refining device. Compared with the prior art, the method has the advantages that heavy component polymerization can be reduced, and the yield and purity of dichloroethane can be improved.

This invention relates to the field of health food technology, specifically to a method for preparing a tea oil-based paste and its beverage. This invention develops a tea oil-based paste that can be directly mixed with water. By compounding multiple components such as protein, polysaccharides, and curcumin, and using high-pressure homogenization technology to construct a stable tea oil dispersion system, it significantly improves the problems of oil separation and greasy taste in tea oil beverages. The unsaturated fatty acids and natural antioxidants abundant in tea oil in this invention optimize the nutritional structure of the beverage from both fatty acid composition and functional activity perspectives. After mixing the tea oil-based paste with water, a tea oil-based instant beverage with both nutritional value and good mixing properties can be obtained, aligning with the modern consumer market trend of healthier, more functional, and more convenient beverages.

The invention belongs to the technical field of high polymer materials, and particularly relates to a preparation method and application of a synergistic flame retardant, and according to the technical scheme, a composite material is prepared from aluminum oxide, high-crystallinity boehmite and low-crystallinity boehmite through a specific preparation method. According to the technical scheme, prepared aluminum oxide and high-crystallinity boehmite are compounded and then mixed with multi-porosity low-crystallinity boehmite, part of the high-crystallinity boehmite / aluminum oxide compound enters pores of the low-crystallinity boehmite under the ultrasonic action, and the boehmite / aluminum oxide compound is formed; when the boehmite / alumina composite material is applied to a thermoplastic plastic material, part of the thermoplastic plastic material also enters pores of the boehmite / alumina composite material, so that the aggregation phenomenon of the boehmite / alumina composite material is prevented, and when combustion occurs, the thermoplastic plastic forms a more compact carbon layer under the framework action of the boehmite / alumina composite material, so that the combustion performance of the composite material is improved. Heat exchange is blocked, and the flame retardant property is improved.

The invention discloses a novel triarylamine compound and an organic electroluminescent device comprising the compound, by modifying the 9,9-position of fluorene, and not modifying other positions, ensuring good hole transport properties and suitable HOMO / LUMO energy levels of the material. In the connected diarylamine, one of the aryl groups is 4,4-di-tert-butylbiphenyl, and the other is an aryl structure of non-4,4-di-tert-butylbiphenyl, which can fine-tune the mobility of holes in different directions of molecular stacking in three dimensions, so that the lateral current can be reduced while ensuring the mobility. At the same time, the introduction of tert-butyl groups can suppress the aggregation of materials and reduce the evaporation temperature, and improve the efficiency and life of the device.

A display substrate and a manufacturing method thereof, a display panel and a display device. The display substrate comprises a base substrate, and a light shielding layer (S1) and a thin film transistor array layer sequentially located on the base substrate; the light shielding layer (S1) comprises a plurality of imaging pinholes (H1); a first protective layer (P0) is arranged between the light shielding layer (S1) and the thin film transistor array layer; a first region is arranged on the base substrate, and the orthographic projection of the metal film layer included in the thin film transistor array layer on the base substrate is arranged outside the first region; at least a part of the orthographic projection of the imaging pinhole (H1) on the base substrate is arranged in the first region; the orthographic projection of the first protective layer (P0) on the base substrate at least covers a part of the first region; the first region comprises a pinhole region (A0); the orthographic projection of the first protective layer (P0) on the base substrate at least covers the pinhole region (A0); the display substrate further comprises a buffer layer (Bf). The display substrate and the manufacturing method thereof, the display panel and the display device can improve the fingerprint recognition effect.

The invention belongs to the technical field of wire materials, and provides a fireproof and waterproof modified tunnel lighting wire and a preparation method thereof. The preparation method comprises the following steps: mixing 4, 4 '-diaminodiphenyl ether with a small amount of octylamine to introduce a hydrophobic group on the structure of a diamine monomer so as to enhance the waterproof performance of a polymer, adding polymethyl methacrylate microspheres as a template material, uniformly dispersing the microspheres in a polyimide solution, and removing the microspheres after solvent treatment to form a micro-void structure, so as to obtain the polymer. The weight of the material is reduced, the heat dissipation effect is enhanced, meanwhile, the heat insulation performance is improved, the pterostilbene phosphate flame retardant and the modified flame retardant are added into the final composite material, and the flame retardants release phosphoric acid and inert gas during combustion to form a protection carbon layer for isolating a fire source and inhibit free radicals in the combustion process, so that the excellent flame retardant effect is achieved, and the service life of the composite material is prolonged. The low-smoke and non-toxic gas during combustion is ensured, and the low-smoke and halogen-free requirements are met.