71results about How to "Reduce interface defects" patented technology

The invention relates to the technical field of biodegradable materials, and particularly discloses a BBM-added bamboo powder biodegradable material and application thereof in beer bottles. The BBM-added bamboo powder biodegradable material is prepared from the following raw materials in parts by mass: 10 to 20 parts of poly (butylene succinate), 10 to 30 parts of poly (butylene adipate-co-terephthalate), 10 to 20 parts of bamboo powder, 1 to 3 parts of dopamine hydrochloride, 0.1 to 0.5 part of n-butylamine, 1 to 2 parts of hexadecyl trimethyl ammonium bromide, 1 to 5 parts of tetraethyl orthosilicate and 1 to 2 parts of tetrabutyl titanate. 1-2 parts of 3-aminopropyltriethoxysilane, 1-2 parts of an antioxidant and 1-2 parts of a plasticizer. The BBM obtained by the invention has excellent mechanical properties, improves the anti-ultraviolet intensity of a degradable material to a certain extent, and has very good biodegradability.

The invention belongs to the field of solar cells, and particularly relates to a hole transport layer, a perovskite solar cell and a preparation method. The hole transport layer comprises a NiOx layer and a self-assembly molecular layer, wherein the self-assembly molecular layer comprises a self-assembly molecular material and a surfactant. The perovskite solar cell comprising the hole transport layer has the advantages of high efficiency, high stability, low production cost and simple preparation process.

The invention belongs to the technical field of epoxy paint, and mainly relates to a preparation method of insulating modified epoxy paint, which comprises the following steps: adding 230-260 parts by weight of basic resin material into a first solvent, and mixing to prepare an epoxy resin material; processing the surface of the modified nano filling material by adding a second solvent into the modified nano filling material; pouring the modified nano filler into an epoxy resin material to form a solution, and further preparing an insulating modified epoxy paint material; by means of the preparation method, the insulativity and stability of the epoxy paint material are improved, and the technical defect that the insulativity of the epoxy paint material cannot be effectively improved through an existing preparation process is overcome.

The invention relates to a polyamide composite membrane containing a middle layer and a preparation method of the polyamide composite membrane. The polyamide composite membrane comprises a polyborosiloxane-based porous polymer substrate, a modified polyimide middle layer and a polyamide separation layer, a modified polyimide intermediate layer is loaded on the surface of the porous polymer substrate, and a polyamide separation layer is loaded on the surface of the modified polyimide intermediate layer. The polyborosiloxane-based porous polymer substrate and the modified polyimide intermediate layer have better compatibility, interface defects can be reduced, the overall performance of the membrane can be improved, moreover, the polyborosiloxane-based porous polymer substrate also has a self-healing characteristic, and after the polyborosiloxane-based porous polymer substrate is damaged, the self-healing property of the polyborosiloxane-based porous polymer substrate is improved. Fractured connection can be repaired without external stimulation (such as light and heat), and self-repairing of the substrate is achieved.

The invention provides a heterojunction cell, a preparation method thereof and a photovoltaic module, and relates to the technical field of solar cells. The heterojunction cell comprises N-type substrate silicon; the first side surface of the N-type substrate silicon comprises a first silicon oxide layer, a first intrinsic amorphous silicon layer, a P-type amorphous silicon layer, an aluminum oxide layer, a first transparent conductive layer and a first grid line electrode which are stacked in sequence; the second side face of the N-type substrate silicon comprises a second silicon oxide layer, a second intrinsic amorphous silicon layer, an N-type amorphous silicon layer, a third silicon oxide layer, a second transparent conductive layer and a second grid line electrode which are sequentially stacked. The first silicon oxide layer and the second silicon oxide layer are respectively combined with the corresponding intrinsic amorphous silicon to form a composite tunneling structure, so that the bottom layer interface recombination can be effectively reduced, and the open-circuit voltage of the heterojunction cell is improved; the aluminum oxide layer and the third silicon oxide layer are introduced as local passivation layers, so that the surface recombination of the heterojunction cell can be effectively reduced under the condition of thinning the silicon wafer, and the photoelectric conversion rate of the heterojunction cell is greatly improved.

The invention belongs to the technical field of heterojunction bipolar transistors, and particularly relates to a heterojunction bipolar transistor and an MOCVD epitaxial growth method thereof. The heterojunction bipolar transistor provided by the invention comprises a transition layer arranged between a base region and an emission layer, and the MOCVD epitaxial growth method comprises the step of growing the transition layer on the surface of the base region by adopting a linear variable-temperature staged pulse metal organic chemical vapor deposition method, pH3 is continuously introduced within the total growth time of the linear variable-temperature staged pulse metal organic chemical vapor deposition method, and trimethyl indium, trimethyl gallium and silane are introduced in a single-cycle staged pulse manner; and the temperature of the reaction chamber is linearly increased from the base region growth temperature to the emission layer growth temperature within the time from the T1 initial moment to the TN initial moment. The heterojunction bipolar transistor obtained by the method provided by the invention is large in gain, low in sheet resistance and good in reliability.

The invention relates to an efficient heat shrink tube preparation method and equipment thereof. FEP granules and modified CaSi2 are fed into an extruder to be extruded, and an FEP pipe is obtained; placing the FEP pipe in an expansion box, taking out the FEP pipe after the pressure in the FEP pipe and the pressure in the expansion box reach expansion pressure and are stabilized for a period of time and the pressure and the temperature in the expansion box and the FEP pipe are reduced to normal pressure and low-temperature oil temperature, and respectively washing the inside and the outside of the FEP pipe with water until the product meets the use requirement; the modified CaSi2 is prepared by the following steps: reacting CaSi2 powder, DMF (Dimethyl Formamide), isocyanatopropyltriethoxysilane, 4-hydroxyphenylboronic acid pinacol ester, lanthanum 5-hydroxyisophthalate, organic tin and methylbenzene, washing, carrying out suction filtration, and drying, thereby obtaining the modified CaSi2. The lanthanum 5-hydroxyisophthalate disclosed by the invention is prepared from 5-hydroxyisophthalic acid and lanthanum nitrate; the heat-shrinkable tube prepared by the invention has a relatively high heat shrinkage ratio.

The invention belongs to the field of solar cells, and particularly relates to a flexible tin-lead perovskite solar cell and a preparation method thereof.A passivation solution is introduced between a tin-lead perovskite light absorption layer and an electron transport layer for passivation treatment, and due to the fact that the passivation solution contains C = O groups or-NH2, the flexible tin-lead perovskite solar cell can be applied to the field of solar cells. The coordination with Sn < 2 + > and Pb < 2 + > in the perovskite light absorption layer can be simultaneously generated, and the defects existing at the perovskite interface can be obviously passivated. Therefore, the tin-lead perovskite solar cell can play a role in inhibiting oxidation of the perovskite layer, and meanwhile, the non-radiative recombination condition of current carriers is reduced, so that the performance of the tin-lead perovskite solar cell is greatly improved.

The invention relates to the technical field of stainless steel, in particular to a high-hardness stainless steel band which comprises a stainless steel band body, a primary nitriding treatment nitride layer, a laser cladding high-entropy alloy layer and a secondary nitriding treatment nitride layer. The laser cladding high-entropy alloy layer is obtained by cladding alloy powder on the stainless steel band with the primary nitriding treatment nitride layer through laser, and the alloy powder comprises iron, cobalt, nickel, aluminum and vanadium elements with equal molar weight. The high-hardness stainless steel band has the effect of improving the strength, hardness, wear resistance and corrosion resistance of the stainless steel band, and the high-hardness stainless steel band can keep good working performance for a long time in a severe working condition environment.

The invention relates to the field of materials, in particular to a PTFE copper-clad plate with a multi-layer structure and a preparation method of the PTFE copper-clad plate. The PTFE copper-clad plate comprises an outermost copper foil layer, a middle high-heat-conductivity tear-resistant layer and a high-adhesion heat-conducting layer between the outermost copper foil layer and the middle high-heat-conductivity tear-resistant layer. The PTFE copper-clad plate disclosed by the invention has high heat-conducting property, high adhesive property and low dielectric loss, is suitable for a high-frequency, high-speed and high-power radio-frequency microwave environment, and ensures stable transmission of high-frequency signals and long-term safe operation of devices.

The present application relates to the field of cementitious materials, and in particular to a high-strength cementitious material based on slag and a preparation method thereof. The high-strength cementitious material based on slag, in parts by mass, comprises the following raw materials: 50 to 65 parts of blast furnace slag, 15 to 25 parts of Portland cement, 5 to 12 parts of fly ash, 10 to 20 parts of filler, 0.5 to 1 part of water reducer, 1 to 3 parts of reinforcing agent, 5 to 15 parts of resin material, 6 to 12 parts of sodium bentonite, and 20 to 40 parts of water. The cementitious material prepared in the present application not only has excellent material strength, but also can ensure good waterproofness, corrosion resistance, etc., and can effectively alleviate the problem of poor stability of the cementitious material caused by differences in slag composition, thereby effectively expanding the application environment and field of slag-based cementitious materials, and has very excellent application prospects.

The invention belongs to the technical field of perovskite batteries, and particularly relates to a perovskite precursor and a preparation method thereof. According to the invention, the perovskite precursor is prepared into an emulsion form, Ge < 4 + > is adopted to prepare the perovskite precursor, and the silicon dioxide nano oxide, the additive and the stabilizer are introduced into the emulsion precursor, so that the moisture resistance and hydrophobicity of the perovskite thin film are improved, and tiny liquid drops in the emulsion are used as a template for perovskite crystal growth, so that the perovskite thin film is prepared. The size and form of perovskite crystals are controlled, the silicon dioxide nano oxide can passivate defect states on the surface of perovskite and reduce recombination of electron-hole pairs, and a precursor in the emulsion is also beneficial to passivating surface defects in the curing process, reducing defect state density and improving device performance. The device prepared by using the perovskite precursor prepared by the invention has good photoelectric property and stability.

The invention discloses a molecular sieve-based flame-retardant material and a preparation method thereof, the molecular sieve-based flame-retardant material comprises a hollow molecular sieve and a flame retardant, the hollow molecular sieve is a hollow structure with micropores, and the flame retardant is coated or embedded in the micropores and the hollow structure of the hollow molecular sieve and / or the crystal surface of the hollow molecular sieve; the preparation method comprises the following steps: C1, introducing a flame retardant into the hollow molecular sieve through a dipping or dissolving method, so that the flame retardant is partially adsorbed in micropores and / or on the surface of the hollow molecular sieve; c2, mixing a hollow molecular sieve containing a flame retardant with the crystallization solution, and carrying out a hydrothermal heavy crystallization reaction at 120-180 DEG C; c3, after the re-crystallization reaction is finished, separating the sample in a filtering or centrifuging manner, cleaning the sample with deionized water, and removing an unreacted crystallization solution; and C4, drying the sample separated in the step C3 to obtain the molecular sieve-based flame-retardant material. The heat stability and the flame-retardant effect are improved.

The invention belongs to the technical field of membrane material preparation, and provides a preparation method and application of a hydrogen-bond-containing multi-dimensional composite material MXene (at) CE, and a mixed matrix membrane capable of efficiently separating CO2 is formed by physically blending the prepared MXene (at) CE and a polyether-polyamide block copolymer Pebax. Hydroxyl on the surface of the two-dimensional MXene nanosheet in the MXene (at) CE interacts with hydroxyl on cellulose to form a hydrogen bond. A polar environment formed by a large number of hydrogen bonds can efficiently capture CO2; the preparation process of the mixed matrix membrane is simple, reaction is controllable, raw materials are cheap and easy to obtain, and conditions are mild. The method provided by the invention has good application in separation of CO2 / CH4 mixed gas, and provides a new effective strategy for efficient separation of CO2.

The invention belongs to the photovoltaic field, and particularly relates to a perovskite precursor solution, a perovskite thin film, a perovskite solar cell and a preparation method. The perovskite precursor solution comprises a perovskite structure substance raw material, an organic additive and a solvent, the chemical formula of the organic additive is shown as a formula I; in the formula I, R1 is amino or acetamido, R2 is chlorine atom, and R3 is hydrogen atom, amino, acetamido, chlorine atom or hydroxyl. The chlorine atom, the pyridine ring and the acetamido (or amino) in the organic additive have a synergistic effect, so that the problems of uneven nucleation and multiple crystal defects of the perovskite thin film are solved, and the photovoltaic performance of the perovskite solar cell is further improved. # imgabs0 #

The present application relates to the technical field of resin, in particular to a conductive polypropylene composite material and a preparation method thereof.In view of the problems of poor processing fluidity, easy shear damage of conductive network and deterioration of mechanical properties caused by high filling of conductive filler in the prior art, the present application realizes the low volume resistivity, high melt flow rate and excellent mechanical toughness by the solid phase pre-coating technology, and effectively balances the conductivity, processability and strength.

This invention discloses a high-performance vitrified microsphere composite polystyrene particle insulation board and its preparation method, comprising the following steps: premixing hydrophobic vitrified microspheres and expandable polystyrene particles coated with expanded graphite at a mass ratio of (2.5~4):1 to obtain composite lightweight aggregate. The insulation board prepared by this invention, with a dry density of only 184-193 kg / m³, exhibits a compressive strength as high as 0.275-0.302 MPa, significantly superior to traditional inorganic insulation boards (0.15-0.25 MPa) and organic insulation boards (0.10-0.15 MPa); its thermal conductivity is as low as 0.034-0.041 W / (m·K), and its insulation efficiency is more than 40% higher than that of traditional inorganic materials, while also possessing Class A fire safety performance; furthermore, the process is simple and controllable, with an industrial solid waste utilization rate of up to 70%, demonstrating significant economic benefits and environmental value, and possessing broad prospects for widespread application.

The invention belongs to the technical field of batteries, and relates to a perovskite battery interface passivation method. The preparation method comprises the following steps: dropwise adding a nickel oxide solution on an ITO substrate, uniformly spin-coating, and then drying, so that a nickel oxide nano-particle layer is cured; dropwise adding an ammonium polyphosphate solution on the cured nickel oxide nano-particle layer, and drying after uniformly spin-coating; coating the perovskite precursor solution on the surface of the ammonium polyphosphate layer of the substrate by adopting a two-step spin coating method, and annealing to complete the preparation of the perovskite layer; preparing an electron transport layer on the perovskite layer; and preparing a gold electrode on the electron transport layer. Ammonium polyphosphate is adopted for passivation of the upper interface and the lower interface of perovskite, phosphate groups of the lower interface and Ni < 2 + > / Ni < 3 + > form a strong coordination structure, a stable buried interface is formed, iodine vacancy forming energy is enhanced, defect states of the lower interface of the film are reduced, phosphate groups of the upper interface can be bonded with uncoordinated Pb < 2 + >, and therefore the defect states of the upper interface of the film are reduced, and the performance of the film is improved. The upper interface and the lower interface of the perovskite solar cell are good in dispersity.

The application discloses a kind of high-performance outdoor full package imitation wood composite board and preparation method thereof, relate to polyurethane composite board technical field, the full package imitation wood composite board includes base board, and the polyurethane material of setting in the lower surface and the four around of base board, and the resin material of setting in upper surface.Its preparation method includes the following steps: pouring polyurethane material in the silica gel mould after surface treatment, place base board, mould pressing, make the polyurethane material with wood texture around and lower surface of base board composite, obtain intermediate product A;Resin material is rolled on the upper surface of intermediate product A, and is dried, to obtain full package imitation wood composite board;The silica gel mould after surface treatment is prepared by transferring real solid wood board texture.

The invention relates to the technical field of halogen-free phosphorus flame-retardant materials, in particular to a halogen-free phosphorus flame-retardant epoxy resin composition and application thereof in a high-heat-resistance copper-clad plate, and the halogen-free phosphorus flame-retardant epoxy resin composition comprises the following raw materials: novolac epoxy resin, a flame retardant, 2-ethyl-4-methylimidazole, a curing agent, fused silicon dioxide and flaky boron nitride. According to the flame retardant, a polyether amine flexible chain segment in a molecular structure of the flame retardant is compatible with an epoxy resin matrix, so that the possibility of phase separation and interface defects is reduced, and the mechanical property level of an epoxy resin cured product is favorably maintained while the flame retardant property is ensured; the epoxy group at the tail end enables the flame retardant to participate in a curing reaction, and is anchored in an epoxy three-dimensional network through a covalent bond, so that the risk of migration and precipitation of the flame retardant is reduced, and the durability and stability of the flame retardant property are ensured.

The present application relates to the technical field of inorganic semiconductor materials, and in particular to a silicon-based two-dimensional gallium nitride and its van der Waals epitaxial preparation method and application. The van der Waals epitaxial preparation method of silicon-based two-dimensional gallium nitride provided in the present application comprises: using gallium metal or gallium oxide as a gallium source, using urea as a nitrogen source, and using a silicon wafer with a van der Waals material on the surface as a growth substrate, and using a vapor deposition method to prepare a silicon-based two-dimensional gallium nitride material. The present application uses van der Waals epitaxial technology to prepare silicon-based two-dimensional gallium nitride on a van der Waals substrate by regulating growth parameters. The silicon-based two-dimensional gallium nitride has high crystal quality, good stability, low preparation cost, fast synthesis speed, and adjustable size and thickness. It can be used as a light detection component of a photodetector for ultraviolet detection.

The application discloses a boride double-scale synergistically reinforced high-manganese steel-based wear-resistant casting and a preparation method thereof, and belongs to the technical field of wear-resistant metal materials and special casting. The casting takes high-manganese steel as a matrix, adopts micron-level TiB2 and nanometer-level ZrB2 to form double-scale boride reinforcing phases, controls the distribution of the reinforcing phases through a powder core wire mesh weaving technology, and forms a metallurgical bonding interface through spray deposition and isothermal annealing. The synergistic improvement of tensile strength, impact toughness and wear resistance is realized. The product is suitable for high-stress wear environments in the mining, metallurgy, building material and other industries, effectively solves the technical pain point that the strength and toughness of traditional high-manganese steel are difficult to be considered, the process is stable and controllable, and differential strengthening can be realized, and the product has industrial application value.

This invention relates to the field of laser cladding technology, specifically to a toughened and reinforced laser cladding alloy powder and its preparation process. It solves the problem of poor hardness and toughness of the cladding layer formed by existing laser cladding alloy powders during use. This laser cladding alloy powder incorporates scandium / erbium-loaded nano-silica and tannic acid-hydroxypropyl cellulose-coated boron nitride. Loading scandium and erbium onto the nano-silica improves the wear resistance and tensile strength of the cladding layer. Coating the boron nitride surface with tannic acid-hydroxypropyl cellulose powder improves the wettability between boron nitride and the metal matrix, reducing interface defects. The synergistic effect of rare earth elements and boron nitride reduces porosity and cracks in the cladding layer. It also improves density by refining grains and strengthening interfacial bonding, further enhancing the material's wear resistance and tensile strength, ensuring service life and reliability under high temperature and high stress environments.

The present invention provides a photovoltaic cell and a method for making the same, the method comprising: making a hole transport layer on a conductive substrate, the hole transport layer being a metal oxide; setting a preset hydrophilic amino acid solution on the surface of the hole transport layer, and performing a first heating treatment so that the preset hydrophilic amino acid solution forms a modified layer above the hole transport layer; making a perovskite layer above the modified layer so that the amino acid molecules in the modified layer are connected to the perovskite layer through hydrogen bonds; making an electron transport layer and an electrode structure above the perovskite layer. In the present invention, the amino acid molecules in the modified layer can improve the surface wettability of the hole transport layer, reduce the pores and defects in the hole transport layer, reduce light scattering and change the refractive index of the film layer, improve the light transmittance of the photovoltaic cell and the crystallization quality of the perovskite layer, ensure the matching degree of the energy levels between the hole transport layer and the perovskite layer, facilitate the transmission and extraction of holes, and ensure the power generation efficiency of the photovoltaic cell.

The application relates to the technical field of composite materials, and discloses a preparation method of a multilayer composite core body, which comprises the following steps: pretreatment, spraying treatment, core composite material preparation, compounding and curing forming; the surface of a fiber base layer is chemically modified through functional pretreatment, the wettability and reactivity of the fiber surface are improved, the different fiber layers with different functional characteristics can be more closely and stably combined, and therefore the integrity, reliability and durability of the multilayer composite core body structure are enhanced; through spraying treatment, functional particles are uniformly loaded on the surface of the fiber base layer in the form of a stable dispersion liquid; the functional particles have good compatibility and bonding force with the fiber base and the interlayer composite material after being treated and surface-modified in a specific manner, the core body is endowed with specific surface functions, the interface bonding between the fiber and the base is enhanced, and the functionality, uniformity and structural strength of the core body are improved.

This invention discloses a precipitated silica dispersant for rubber, its preparation method, and its application, relating to the field of rubber additives. The precipitated silica dispersant for rubber is made from raw materials comprising the following proportions: modified vegetable oil and hydroxide, wherein the molar ratio of the modified vegetable oil to the hydroxide is 1:(0.3-0.6), and the modified vegetable oil is copolymerized from vegetable oil monomers, benzene ring unsaturated monomers, and cashew nut phenol. This application provides an environmentally friendly and safe precipitated silica dispersant that can significantly improve the dispersibility of precipitated silica in rubber compounds while simultaneously improving the mechanical properties of the rubber compounds.

This invention discloses a method for preparing van der Waals metal thin films. The method includes the following steps: S1, coating a polyvinyl alcohol (PVA) film onto the surface of a supporting substrate; S2, depositing a metal film on the surface of the PVA film to obtain an intermediate; S3, placing the intermediate in water at 60-80°C to remove the PVA film, obtaining a floating metal film; transferring the metal film to the surface of a target substrate, and bonding the two together using van der Waals forces to obtain the final product. This invention utilizes the controllable dissolution properties of PVA, achieving the separation and transfer of the metal film from the supporting substrate using deionized water, avoiding the use of toxic chemical solvents and interface damage caused by high-energy bombardment. The method is simple, environmentally friendly, and can be widely applied to the preparation of van der Waals heterostructures such as metal-semiconductor and metal-insulator structures.

The invention discloses a conductive material and a preparation method and related application thereof, and relates to the field of materials, raw materials of the conductive material comprise SAMs molecules and EDOT molecules, the high-performance conductive material is obtained after the SAMs molecules and the EDOT molecules are mixed, compared with PSS, the use amount of SAMs in the conductive material is extremely low, acidity can be greatly reduced, and the stability of a device can be improved; and secondly, the energy band structure can be adjusted by adjusting the types and the adding proportion of the SAMs, and proper hole transport layers can be designed for different devices, so that the efficiency of the hole transport material as a carrier transport material is improved, and the application range is expanded. In addition, SAMs serves as a catalyst and a stabilizer in the reaction process, synthesis can be conducted through a one-pot method, the obtained material can be directly used, the complex purification process is avoided, and the method is suitable for large-scale green industrial production and has very high expected industrial value.

The present invention provides a flame retardant material containing bauxite and a preparation method thereof, and relates to the technical field of flame retardant materials. The flame retardant material containing bauxite of the present invention is prepared from the following raw materials in parts by weight: 25-30 parts of epoxy resin, 8-10 parts of modified sepiolite, 12-16 parts of bauxite, 12-16 parts of attapulgite-nano silicon carbide composite, 6-8 parts of curing agent, 0.5-1 parts of dispersant, 10-12 parts of hexaphenoxy cyclotriphosphazene, 6-10 parts of ammonium polyphosphate, 5-7 parts of starch, 3-5 parts of melamine, and 20-25 parts of water. The flame retardant material containing bauxite of the present invention improves the flame retardant performance, high temperature resistance and adhesion ability of the material by optimizing its composition and ratio, which is helpful to promote the technological progress and industrial upgrading of the fireproof material industry, and provides strong support for protecting the safety of life and property.

The application provides a polymethyl methacrylate product and a preparation method thereof. The preparation method of the polymethyl methacrylate product comprises the following steps: S1. mixing a resin matrix, a toughening agent, an antioxidant and a light stabilizer to obtain a mixture; the resin matrix comprises a polymethyl methacrylate resin; the toughening agent comprises a core-shell structure toughening agent and a polyester-based toughening agent; the core-shell structure toughening agent comprises a core and a shell layer; the core comprises polybutyl acrylate, and the shell layer comprises polymethyl methacrylate; S2. melt blending, extruding and granulating the mixture, and drying, injection molding, cooling and annealing. In the application, the core-shell structure toughening agent and the polyester-based toughening agent can synergistically improve the toughening effect.