26results about How to "Avoid phase separation" patented technology

The invention belongs to the technical field of cables, and particularly relates to a high-temperature-resistant metallurgical vehicle-mounted flexible cable and a preparation method thereof. According to the high-temperature-resistant cable material, polyimide, polyphenylene sulfide and polybenzimidazole are matched, so that the high-temperature-resistant cable material is endowed with extremely high high temperature resistance, can resist the high temperature of 300 DEG C, and is extremely suitable for cable materials for metallurgy. Then, the flexibility of the material is improved by adding a flexible polyether-ether-ketone / nano silicon dioxide compound, and the surface of nano silicon dioxide is treated, so that the loading rate of polyether-ether-ketone can be increased, the phase separation phenomenon of polyether-ether-ketone in a blend is prevented, and uniform dispersion is promoted. And finally, the prepared high-temperature-resistant metallurgical vehicle-mounted flexible cable material is used as a filler and a sheath of the cable material, so that the cable structure is reduced, the production difficulty of the cable is reduced, the production process is simplified, and the material and process requirements are reduced, thereby achieving the purposes of reducing the cost and improving the production efficiency to a certain extent.

The invention relates to the technical field of release films, and discloses a silicon-free release PET film and a preparation method thereof. The silicon-free release PET film comprises a polymer wax layer, an intermediate layer and a polymer wax layer in order from top to bottom; the intermediate layer is made of the following raw materials: PET, an inorganic modified filler, a composite additive and an antioxidant 1010; wherein the inorganic modified filler is prepared by grafting polyamide-amine onto the surface of aluminum oxide, thereby improving the mechanical properties and high temperature resistance of the film, and avoiding the film from cracking or breaking when subjected to external force; the composite additive is prepared by preparing a chloroether rubber derivative containing nitrogen and phosphorus flame retardants in the structure, thereby improving the toughness and flame retardant properties of the film, and the comprehensive play of these effects enables the silicon-free release PET film to maintain excellent performance and stability and have a long service life.

The invention belongs to the technical field of ammonia synthesis and electro-catalysis, and particularly relates to a preparation method and application of high-entropy alloy aerogel for electro-catalysis. The preparation method comprises the following steps: mixing an inorganic metal salt in a solvent to obtain a precursor solution, quickly adding a reducing agent, standing, and washing and drying the obtained product to obtain the high-entropy alloy aerogel catalyst, the inorganic salt is selected from five or more of copper salt, cobalt salt, iron salt, nickel salt, palladium salt, gold salt, ruthenium salt, platinum salt and silver salt. The three-dimensional continuous porous reticular high-entropy alloy aerogel is obtained through one-step reduction of the inorganic metal salt and standing assembly, the high-entropy alloy aerogel prepared through the method is high in reduction assembly speed, phase separation of multi-component alloy can be effectively inhibited, an amorphous alloy structure is obtained, and therefore when the high-entropy alloy aerogel is applied to ammonia production through electro-catalysis nitrate reduction, the high-entropy alloy aerogel can be used for preparing the high-entropy alloy aerogel. And excellent electrochemical activity and stability can be presented in an ultra-low overpotential range of-0.2 to + 0.2 V vs.RHE.

The invention discloses a perovskite light-absorbing material and a preparation method thereof, and a perovskite solar cell and a preparation method thereof, the perovskite light-absorbing material has a structural general formula of ABX3, A comprises any one or more of CH3NH3 +, CH (NH2) 2 +, (CH3) 2NH2 + and Cs +; b comprises any one or two of Pb < 2 + > and Sn < 2 + >; x is any one or more of halide ions I <->, Br <-> and Cl <->; and the particle size of the perovskite light-absorbing material is 50-2000 nm. The perovskite grain size of the perovskite light-absorbing material is increased, the grain boundary is reduced, the light-absorbing capability of the film is enhanced, the stability is improved, and the hysteresis effect is inhibited. The two-dimensional perovskite precursor reacts with incompletely reacted lead iodide in the three-dimensional perovskite thin film, and the two-dimensional perovskite can passivate defects in the three-dimensional perovskite, fill the perovskite crystal boundary position, inhibit halogen ion migration, improve the overall crystallinity and enhance the device stability.

The invention provides a perovskite thin film gas passivation method and a laminated solar cell, and belongs to the technical field of perovskite crystal silicon laminated solar energy, a hot injection gas passivation process is adopted to improve the passivation effect, a prepared perovskite thin film is placed in a closed container, and the perovskite thin film is subjected to gas passivation and heating to obtain the perovskite thin film. According to the invention, defects existing in the perovskite thin film can be passivated, sites where defects are possibly generated in the perovskite at high temperature can be passivated, internal defects of the thin film are reduced, the phase separation phenomenon of broadband gap perovskite is effectively inhibited, and the photoelectric conversion efficiency and stability of the crystalline silicon / perovskite laminated solar cell are improved.

The invention discloses a method for improving the stability of metal halide perovskite, a material and application, belongs to the technical field of semiconductor photoelectric devices, and mainly relates to a method for improving the stability of the metal halide perovskite by doping methylene diamine cations (CH2 (NH3) 22 + and MDA < 2 + >) at a site A of a halide perovskite lattice and application of the method. The methylenediamine cation realizes substitution doping of halide perovskite by substituting part of monovalent A-site host cations in a perovskite crystal growth process, and becomes a divalent organic cation which has a proper ion size and can be doped into a lattice A site; the high charge number of the material can form stronger electrostatic interaction with halogen anions which are easy to move in perovskite, so that the migration difficulty of the halogen anions is increased. By doping multivalent cations at the position A of a perovskite lattice, perovskite ion migration is inhibited, phase separation is inhibited, and an important thought and method are provided for preparing efficient and stable perovskite photovoltaic devices and laminated solar cells.

The invention relates to a bi-crosslinking cyanate ester-epoxy blended adhesive and a preparation method thereof, and relates to the technical field of high polymer materials, the adhesive comprises the following components in parts by weight: 45-85 parts of cyanate ester resin, 5-35 parts of epoxy resin, 0-20 parts of a reactive diluent, 2-6 parts of a bi-crosslinking curing agent and 0-50 parts of a functional filler, the bi-crosslinking curing agent has the following structure: R is alkyl, aliphatic amine or aryl; r'is a primary amino group and / or a secondary amino group, R ''is-C = N and / or-OCN, m is an integer from 1 to 3, and n is an integer from 1 to 2. By adding the double-crosslinking curing agent containing the amino group and the cyano group, the technical problems of high curing temperature, large stress after curing, poor temperature resistance of epoxy resin and the like of the existing cyanate ester resin system are solved, and the curing temperature, the bonding strength and the temperature resistance of the adhesive are balanced. The adhesive can be cured at the temperature lower than 90 DEG C, and has high glass transition temperature, low thermal weight loss and excellent adhesive property.

The application relates to the technical field of high polymer composite materials, and particularly discloses a resin applied to motor rotor carbon fiber winding and a preparation method thereof. The resin comprises the following raw materials: 40-60 parts of a tetrafunctional phenolic epoxy resin, 20-40 parts of a biphenyl type epoxy resin, 15-20 parts of a core-shell rubber, 0.1-0.2 parts of triphenylphosphine, 20-25 parts of a curing agent, 0.5-1 part of an accelerator, 3-5 parts of nano fillers, 1-2 parts of a silane coupling agent and 5-8 parts of an active diluent. The resin prepared by the application has excellent high-temperature resistance and high elongation at break, and can be applied to motor rotor carbon fiber winding.

The invention belongs to the technical field of cables, and particularly relates to a parallel reinforced overhead insulated cable. The preparation method comprises the following steps: carrying out a reaction on polyvinyl alcohol and trithiocarbonate to form polyvinyl alcohol-CTA with an RAFT functional group, then carrying out a free radical polymerization reaction on the polyvinyl alcohol-CTA and vinylidene fluoride to generate a triblock copolymer, and finally, carrying out a reaction on bismaleimide and a diene part in the triblock copolymer to obtain the self-healing weather-resistant additive. The self-healing insulating layer material with higher weather resistance is obtained by mixing the self-healing insulating layer material with cross-linked polyethylene, and the self-healing insulating layer material is applied to parallel reinforced overhead insulated cables, shows excellent durability, low maintainability and long-term reliability, and is very suitable for being used in various severe environments.

The invention discloses a polyetherimide-ultraviolet light absorber composite film and a preparation method and application thereof, and the method comprises the following steps: adding a hydroxyl-containing ultraviolet light absorber into a diamine dispersion liquid to obtain a composite solution; bisphenol A type diether dianhydride is added into the composite solution in batches, stirring reaction is carried out, and composite sol is prepared; and preparing a composite film by using the composite sol, and carrying out imidization treatment on the composite film to prepare the polyetherimide-ultraviolet light absorber composite film. According to the method, a hydroxyl-containing ultraviolet light absorber is introduced, and the hydroxyl-containing ultraviolet light absorber and polyetherimide can form hydrogen bonds, so that chain segments are combined more tightly, molecular chain segments are increased, and relative movement of the chain segments is not easy to generate at high temperature, so that the thermal stability is improved, meanwhile, the weather resistance of the composite material is improved, and the service life of the composite material is prolonged. The method is simple to operate and efficient in reaction, and has wide application value.

The invention relates to the technical field of furan resin, in particular to high-strength furan resin as well as a preparation method and application thereof. The high-strength furan resin comprises the following components in parts by weight: 35-60 parts of furfuryl alcohol, 15-25 parts of formaldehyde, 5-10 parts of urea, 1-3 parts of a formaldehyde reducing agent and 3-5 parts of a cross-linking agent. The high-strength furan resin provided by the invention is high-performance furan resin with high mechanical strength, excellent moisture resistance and low free formaldehyde release, and has a wide application prospect in the field of casting. The introduced cross-linking agent can improve the cross-linking density, improve the tensile strength and avoid brittle failure. In addition, carboxyl in molecules of the cross-linking agent can adjust polarity and compatibility of the system, phase separation in storage and use processes is inhibited, and the storage stability of the resin is remarkably improved. The formaldehyde reducing agent introduced by the invention can be subjected to nucleophilic addition reaction with free formaldehyde in a system, so that the formaldehyde content can be efficiently and enduringly reduced, and the production and use environment can be improved.

The present application relates to the field of light stimulus response material, in particular to a kind of D-A structure regulation intramolecular charge transfer realizes double-wavelength stimulus response film long afterglow material and its preparation method and application, the film long afterglow material is host-guest doped type, the host is polyvinyl alcohol, the guest is D-A type triphenylphosphonium derivative.In the D-A structure regulation intramolecular charge transfer of the present application realizes double-wavelength stimulus response film long afterglow material, the single host has no photoexcitation phosphorescence characteristics, the single guest only has weak photoexcitation phosphorescence characteristics, and the film material presents the regulation of double-wavelength photoexcitation after being excited by ultraviolet light by being doped into film by guest and host.Based on D-A structure, the design idea and application prospect of single-component double-wavelength stimulus response film long afterglow material are greatly expanded.

The invention provides a high-entropy metal sulfide, a preparation method thereof and a nitrogen dioxide gas sensor. Metal elements in the high-entropy metal sulfide comprise a tungsten element, a molybdenum element, a zinc element, a tin element and a chromium element. The high-entropy metal sulfide is of a single-phase structure. The metal elements of the high-entropy metal sulfide comprise the tungsten element, the molybdenum element, the zinc element, the tin element and the chromium element, the five elements are matched with one another to generate a synergistic effect, adsorption and the reaction rate of gas molecules are increased, and then the sensitivity to nitrogen dioxide is improved; the five metal elements are matched with one another, so that the electronic state of the high-entropy metal sulfide is enriched, the conductivity of the high-entropy metal sulfide is improved, and the sensing capacity on nitrogen dioxide gas is improved; the high-entropy metal sulfide accidentally shows high sensitivity to nitrogen dioxide gas, and higher response speed and higher monitoring sensitivity to nitrogen dioxide are achieved.

The invention relates to the field of preparation of high polymer materials, in particular to a flexible irradiation crosslinking polyethylene foam material with high tensile strength and a preparation method thereof. According to the method, an elastic grafted polyion brush functional component is compounded with low-density polyethylene, so that the flexibility and tensile strength of the polyethylene foam can be effectively improved, and the polyethylene foam material with flexibility, high tensile strength and no corona gluing is obtained. The method disclosed by the invention has the following advantages: (1) the product is good in flexibility and high in tensile strength, and when the apparent density is lower than 0.1 g / cm < 3 > and the thickness is 1mm, the elastic modulus is below 0.8 MPa, the tensile strength is more than 1.6 MPa, and the elongation is more than 250%; (2) the cohesiveness of the product is high, the surface tension can reach 39 mN / m or above, the requirement of a gluing process is met, and the surface tension can be maintained for 6 months or above; and (3) the obtained product has wide application in the fields of precision mechanical shock absorption, electronic equipment, electronic screen protection and the like.

The invention relates to the technical field of coatings, in particular to water-based two-component low-temperature stoving varnish for a photovoltaic frame and a preparation method of the water-based two-component low-temperature stoving varnish. The water-based two-component low-temperature stoving varnish for the photovoltaic frame comprises a component A and a component B, comprising the following raw materials in parts by weight: 50-60 parts of resin, 10-25 parts of functional filler, 4-10 parts of a solvent, 0.2-0.5 part of a defoaming agent, 0.1-0.3 part of a wetting agent, 0.5-1.5 parts of a dispersing agent, 0.2-0.5 part of a thickening agent and 10-15 parts of water, and the component B is isocyanate. The low-temperature baking varnish prepared by the invention has good adhesive force and excellent corrosion resistance, aging resistance and wear resistance.

This application relates to the field of solar cells, disclosing perovskite materials, perovskite layers, their preparation methods, perovskite solar cells, and photovoltaic modules. The perovskite material has a band gap of 1.65 eV to 1.75 eV, and its chemical formula is ABX3, where A is an A-site cation, B is a B-site cation, and X is an X-site anion. The elements corresponding to the X-site anion include iodine, bromine, and chlorine. In the perovskite material, the mass percentage of bromine is 0.0001% to 0.0012%, and the mass percentage of chlorine is 0.0005% to 0.0020%. The perovskite material provided in this application, while meeting the wide band gap requirement, helps to avoid the formation of bromine-rich phases, thereby effectively preventing the separation of bromine and iodine phases and ensuring that the perovskite layer prepared using this material has high structural stability.

The present application belongs to the technical field of building coatings, and relates to a dual formaldehyde-removing and antibacterial coating and a preparation method thereof. The formaldehyde-removing and antibacterial coating prepared by the method can effectively remove formaldehyde under the action of ultraviolet light catalyst, and at the same time, the amino group can react with the negative charge on the bacterial cell membrane to cause the integrity of the bacterial cell membrane to be destroyed, so that the permeability of the bacterial cell membrane is changed, the cell contents are leaked, and finally the cell death is caused. The polyethylene imine grafted sodium alginate is introduced into the surface of titanium dioxide, so that the high adsorption performance of the alginate on formaldehyde and the dual formaldehyde-removing and antibacterial effect are utilized, and the dispersibility of the filler in the coating matrix is improved through the chemical bond and action between the amino group carried by the polyethylene imine and the epoxy resin. Therefore, the agglomeration problem of the inorganic filler is reduced, the formaldehyde-removing and antibacterial performance of the coating is improved, and the efficient and long-lasting application of the functional coating in the natural indoor environment is realized.

This invention relates to the field of advanced petrochemical new materials technology, and discloses a luminescent composite material, its preparation method, and its application. The composite material comprises the following components: homopolymer polypropylene, polybutylene succinate, a compatibility modification system, double-modified rare-earth strontium aluminate luminescent powder, dispersant, antioxidant, weathering agent, toughening agent, nucleating agent, and silane coupling agent. This invention employs a compatibility modification system composed of maleic anhydride-grafted PP-g-PBS copolymer and double-modified nano-montmorillonite. The maleic anhydride-grafted PP-g-PBS copolymer constructs a chemical link between the polypropylene and polybutylene succinate molecular chains through a grafting reaction, reducing the interfacial tension between the two resins. The double-modified nano-montmorillonite, after ionic liquid intercalation and silane grafting treatment, exhibits increased interlayer spacing and improved surface activity, uniformly dispersed in the matrix, and acts as a physical crosslinking point, improving the compatibility of the matrix resin and preventing phase separation.

The invention discloses plastic capable of transmitting infrared light and a preparation method thereof, and belongs to the field of high polymer material engineering. The plastic capable of transmitting infrared light, prepared by the invention, comprises the following raw material components in parts by mass: 100 parts of carrier resin, 20-30 parts of modified infrared transparent filler and 1-2 parts of auxiliaries, wherein the carrier resin is obtained by crosslinking an ethylene-vinyl acetate copolymer, polyethylene and vinyl cyclosiloxane; the vinyl cyclosiloxane comprises 1, 3, 5-trivinyl-1, 3, 5-trimethyl cyclotrisiloxane and tetramethyl tetravinyl cyclotetrasiloxane, and the vinyl cyclosiloxane comprises 1, 3, 5-trivinyl-1, 3, 5-trimethyl cyclotrisiloxane and tetramethyl tetravinyl The modified infrared transparent filler is obtained by modifying the infrared transparent filler with 1, 1, 3, 3-tetramethoxy-1, 3-dimethyl disiloxane; the infrared transparent filler is obtained by compounding barium fluoride and magnesium fluoride; the plastic capable of transmitting infrared light, prepared by the invention, is relatively good in mechanical property and high in infrared transmittance.

This invention relates to the field of silicone technology, specifically to a silicone composite thermally conductive material and its preparation process. The preparation process of a silicone composite thermally conductive material includes: pretreatment of graphene filler, preparation of modified graphene filler, preparation and modification of heterogeneous filler, and preparation of the silicone composite thermally conductive material. This invention utilizes modified graphene and the construction of a boron nitride-silica heterogeneous filler to form a multi-level thermally conductive network. Combined with electric field-induced ordered arrangement of fillers and pretreatment of graphene with chemically reduced gel and directional ice template, multiple methods are used synergistically to reduce interfacial thermal resistance and phonon scattering, constructing continuous thermally conductive channels. Simultaneously, it improves the structural uniformity, thermal conductivity stability, and mechanical properties of the composite material, effectively solving problems such as filler agglomeration and migration, and significantly improving the thermal conductivity of the silicone composite material.

The application provides a preparation method of wear-resistant and water-absorbing regenerated polyester fiber, comprising the following steps: S1. mesoporous silicon dioxide is immersed in a salt solution to obtain salt-containing silicon dioxide; S2. the salt-containing silicon dioxide and regenerated polyester chips are placed in a double-screw extruder for blending, extrusion and granulation to obtain modified regenerated polyester skin layer master batch; S3. sodium alginate / cellulose nanocrystal composite nanomaterial and regenerated polyester chips are placed in a double-screw extruder for blending, extrusion and granulation to obtain modified regenerated polyester core layer master batch; S4. the master batches prepared in S2 and S3 are respectively used as skin layer and core layer master batches, dry spinning is adopted, and drafting is performed to obtain a skin-core structure fiber; and S5. the skin-core structure fiber obtained in S4 is immersed in a saturated calcium chloride solution, vacuum impregnation is performed, and a wear-resistant and water-absorbing regenerated polyester fiber is obtained. The application prepares a regenerated polyester fiber which can realize the synergistic improvement of wear resistance and water absorption performance, and has mechanical stability and environmental protection.

The application relates to the technical field of building materials, in particular to a core material for A-grade fireproof metal composite board and a preparation method thereof. According to weight parts, the core material for the A-grade fireproof metal composite board comprises the following raw materials: 30-60 parts of base resin, 20-40 parts of flame retardant, 5-10 parts of modified montmorillonite, 0.5-2 parts of coupling agent, 0.5-3 parts of dispersant, 1-3 parts of compatibility agent and 0.5-3 parts of lubricant. The core material has excellent flame retardancy, antibacterial property and mechanical property.

The application relates to the technical field of organic silicon materials and ultraviolet light curing, and discloses a preparation method of a (methyl) acryloxy silane oligomer and a UV cured product thereof. The method comprises the following steps: carrying out hydrolysis condensation reaction on KH-572 monomers, an alcohol solvent and a catalyst at 40-60 DEG C, and preparing KH-572 oligomers with a polymerization degree of 5-25 by controlling the hydrolysis conditions; and mixing the oligomers with methyl methacrylate and a photoinitiator according to a weight ratio of (60-70):(40-30):(1-3), and then carrying out ultraviolet light curing forming. The application solves the technical problem that the KH-572 monomers cannot be directly used for curing by controllable polymerization, and the obtained cured coating has the advantages of compact structure and controllable hydrophobicity. The preparation method is simple in process and easy for industrialized production.

The application belongs to the technical field of resin materials for copper-clad plates, and particularly relates to a carbon-hydrogen resin composition for prepreg and a preparation method thereof. The carbon-hydrogen resin composition is prepared from the following raw materials in parts by mass: hyperbranched modified prepolymer resin 90-100 parts, inorganic filler 15-25 parts, silane coupling agent 0.2-0.4 parts, crosslinking agent 10-20 parts, initiator 0.8-1.5 parts, dibutyltin dilaurate 0.1-0.3 parts, antioxidant 0.5-1 part, and toluene 50-80 parts. The carbon-hydrogen resin composition prepared by the application has low dielectricity, high thermal conductivity, high heat resistance, high toughness, and excellent processing forming property.

The invention relates to the technical field of high polymer materials, in particular to a butyl acrylate-based high polymer dispersant for polyimide foam as well as a preparation method and application of the butyl acrylate-based high polymer dispersant. The dispersing agent is prepared from butyl acrylate (BA), methyl methacrylate (MIMA), polyethylene glycol monomethyl ether acrylate (PEG400MEA), hydroxyethyl methylacrylate (HEMA) and functional monomers through free radical polymerization reaction, wherein the mass percent of each monomer is as follows: 20%-40% of BA, 10%-25% of MMA, 35%-60% of PEG400MEA, 3%-10% of HEMA and 1%-5% of functional monomers. The functional monomer is one or more of acrylic acid, methacrylic acid, sodium p-styrene sulphonate or N-hydroxymethyl acrylamide. In the preparation process, peroxide or an azo substance initiator is adopted, and free radical reaction is carried out under the protection of inert gas. The dispersant belongs to anionic macromolecules, the weight-average molecular weight is 5000-50000, and the molecular weight dispersion coefficient (PDI 1.2-2.5).

The present invention relates to the technical field of polymer materials, and specifically to a block copolymer modified para-aramid polymer solution and a preparation method and application thereof, wherein the preparation method comprises: dissolving a solubilizing salt into an organic solvent under an inert gas atmosphere to obtain the polymer solution; adding a third monomer and terephthaloyl chloride to the polymer solution, controlling the reaction temperature to perform a pre-condensation reaction, and obtaining an amino-terminated oligomer system; adding p-phenylenediamine and terephthaloyl chloride to the oligomer system, and controlling the stirring reaction temperature to perform a block copolymerization reaction under stirring conditions; after the block copolymerization reaction is completed, adding a neutralizer to neutralize the acidic substances generated during the reaction, and finally obtaining a modified para-aramid polymer solution in a neutral environment. The polymer solution is applied to the field of lithium battery separators to obtain a modified aramid coated separator with excellent heat shrinkage performance, high film breaking temperature, porous structure, and high puncture resistance.