21results about How to "High decomposition temperature" patented technology

The invention belongs to the technical field of polymer composite materials, and particularly relates to a high-strength flame-retardant composite material for pipelines and a preparation method thereof. The high-strength flame-retardant composite material for the pipeline is prepared from the following components in parts by weight: 70 to 80 parts of PA12T, 10 to 15 parts of a toughening agent, 20 to 30 parts of fiber reinforced filler, 8 to 16 parts of melamine polyphosphate, 1 to 6 parts of attapulgite, 2 to 4 parts of graphene, 0 to 3 parts of a coupling agent, 0 to 3 parts of a lubricating agent and 0 to 3 parts of an antioxidant. MPP is an N and P double-element synergistic flame retardant, and the flame retardant effect is better. Through the adsorption effect of the attapulgite, the dispersing performance of the MPP in the PA12T can be improved, and the precipitation phenomenon of the MPP can be prevented. The graphene is used as a common flame-retardant carbon-forming agent, and the lamellar structure of the graphene can play a role in resisting molten drops; and moreover, the graphene and the attapulgite with a rodlike structure interact with each other, so that the dispersion performance of the graphene, the attapulgite and the melamine polyphosphate in the nylon resin is promoted.

The invention discloses a compound and a preparation method thereof, a hole transport material and a perovskite solar cell, and belongs to the technical field of materials. The structure of the compound is as follows: # imgabs0 # 10lt; nlt; 10000, and n is an integer; and Ar is an aniline fluorene group or a diphenylamine group. The preparation method comprises the following steps: reacting dithienopyrrole, 4-bromobenzaldehyde and a catalyst I to obtain an intermediate I; reacting the intermediate I with bromo-succinimide to obtain an intermediate II; reacting the intermediate II, aniline fluorene or diphenylamine substances and a catalyst II to obtain an intermediate III; reacting the intermediate III with sodium borohydride to obtain an intermediate IV; reacting the intermediate IV with acryloyl chloride to obtain an intermediate V; mixing and reacting the intermediate V and an initiator to obtain the compound. As a hole transport material, the compound is relatively high in decomposition temperature, high in stability, good in film-forming property and good in mobility, and is beneficial to the photoelectric conversion effect of a perovskite solar cell.

The application discloses a method for preparing polylactic acid by using an organic base-sulfourea dual catalytic system, and comprises the following steps: under the catalysis of the organic base-sulfourea dual catalytic system, ring-opening polymerization of lactide is carried out under the action of an initiator to obtain the polylactic acid; and the sulfourea is disulfourea or trisulfourea. The sulfourea catalyst is easy to synthesize, the organic base-sulfourea dual catalytic system formed by modular combination of the organic base and the sulfourea has a high decomposition temperature, and therefore has good high-temperature resistance, so that the controllable ring-opening polymerization of lactide in a solution can be realized, and the controllable ring-opening polymerization of lactide at high temperature can also be realized; the catalyst used in polymerization is a hydrogen bond bifunctional catalyst, and the controllable polymerization effect that cannot be achieved when only alkali is used for catalysis can be achieved, so that the polylactic acid has a narrow molecular weight distribution; by adjusting the ratio of lactide, the initiator, the organic base and the sulfourea, the catalytic activity can be further regulated, and the polylactic acid with a high molecular weight and a controllable structure can be obtained.

The present invention relates to the field of new energy batteries, and specifically to an electrode assembly and a preparation method thereof and a battery, wherein the electrode assembly comprises a positive electrode sheet, a negative electrode sheet and a separator, wherein a functional layer is provided between the negative electrode sheet and the separator; wherein the functional layer contains a fibrous solid electrolyte and niobium-based oxide nanoparticles, and at least part of the niobium-based oxide nanoparticles are adsorbed on the surface of the fibrous solid electrolyte. The battery of the present invention can improve the thermal stability of a high energy density battery cell, accelerate the migration of lithium ions, and enhance the fast charging performance of the battery through the functional layer containing fibrous solid electrolyte and niobium-based oxide nanoparticles.

The invention belongs to the technical field of functional microcapsules, and discloses an aromatic anti-mosquito microcapsule as well as a preparation method and application thereof. The preparation method comprises the following steps: emulsifying a core material in a weakly alkaline aqueous solution containing an emulsifier to obtain a core material emulsion; diisocyanate and dopamine are added into the core material emulsion for a reaction, dopamine is subjected to in-situ self-polymerization to generate polydopamine, polydopamine and diisocyanate are subjected to an interface reaction, a polyurea shell material is generated, the core material is wrapped in the polyurea shell material, and the aromatic anti-mosquito microcapsule is obtained. The core material is composed of two components including mosquito-repelling plant essential oil and deet.

The present invention belongs to the technical field of polyester fiber manufacturing, and particularly relates to a flame-retardant polyester fiber and a preparation method thereof. The flame-retardant polyester material is obtained by melt blending and spinning polyester slices, flame retardants and modified aramid fibers as raw materials. The flame retardant interacts with cyclic phosphate as an acid source, melamine as a gas source and pentaerythritol as a carbon source. When heated, the decomposition product has a strong dehydration effect, which can carbonize the surface of the covered polymer to form a carbon film, isolate the air, and prevent the polymer from continuing to burn, so that the flame-retardant polyester fiber has good flame retardant properties.

The present invention belongs to the technical field of polymer composite materials, and specifically relates to a high-strength flame-retardant composite material for pipelines and a preparation method thereof. The high-strength flame-retardant composite material for pipelines comprises the following components in parts by weight: 70-80 parts of PA12T, 10-15 parts of toughening agent, 20-30 parts of fiber-reinforced filler, 8-16 parts of melamine polyphosphate, 1-6 parts of attapulgite, 2-4 parts of graphene, 0-3 parts of coupling agent, 0-3 parts of lubricant, and 0-3 parts of antioxidant. MPP is a N and P dual-element synergistic flame retardant with better flame retardant effect. Through the adsorption of attapulgite, the dispersibility of MPP in PA12T can be improved to prevent precipitation. As a common flame-retardant carbonizing agent, graphene has a lamellar structure that can not only play a role in resisting molten droplets; and it interacts with the attapulgite of the rod-like structure, which promotes the dispersibility of graphene, attapulgite and melamine polyphosphate in nylon resin.

The invention discloses a coated high-nickel material and a preparation method and application thereof, the coated high-nickel material comprises a high-nickel material and a coating layer coating the surface of the high-nickel material, and the coating layer is composed of an NASICON fast ion conductor and a metal boride. The coated high-nickel material has high surface ion / electron conductivity, is easy to dissipate heat and has good compatibility with electrolyte.

The invention relates to the technical field of heat-sealing adhesives, and in particular to a composite water-based thin-film heat-sealing adhesive and a preparation method thereof. The invention discloses an ethylene acrylic acid copolymer using tert-butyl alcohol, acrylic acid and ethylene as raw materials, which has excellent ultraviolet light aging resistance and a stable and lasting bonding effect. The ethylene acrylic acid copolymer is added into a flame-retardant water-based polyurethane to prepare the composite water-based thin-film heat-sealing adhesive, which can ensure that a good bonding effect can be achieved on surfaces of different materials, and can also optimize the heat-sealing and flame-retardant properties of the thin-film heat-sealing adhesive by combining the flame-retardant properties of the flame-retardant water-based polyurethane, so as to ensure that a stable, firm and flame-retardant sealing layer is formed during the heat-sealing process; secondly, the ethylene acrylic acid copolymer can interact with a flame retardant through a specific group or segment in its molecular structure, so as to further improve the flame-retardant properties of the heat-sealing adhesive, so that the prepared composite water-based thin-film heat-sealing adhesive has a wider application field.

The invention discloses a lithium manganese iron phosphate positive electrode material and a preparation method thereof, and relates to the technical field of lithium ion batteries, and the method comprises the following steps: adding a LiMnXFe (1-X) PO4 precursor, a composite carbon source and a part of viscous dispersant into deionized water according to a ratio, carrying out ultrasonic oscillation for 1-2 hours, and then carrying out suction filtration, drying and grinding to obtain a mixture; putting the mixture into a sintering furnace, sintering for 2 hours at 200 DEG C in a nitrogen atmosphere, heating to 650-750 DEG C, sintering for 4-5 hours, cooling to room temperature, and grinding to obtain modified LiMnXFe (1-X) PO4; and uniformly mixing the modified LiMnXFe (1-X) PO4, the conductive agent, the binder and the residual viscous dispersant to obtain black slurry, namely the lithium iron manganese phosphate positive electrode material with excellent electrochemical performance.

The invention discloses a new energy battery insulation protection UV tape and a preparation method thereof, which belongs to the technical field of battery UV tape processing, and comprises the following steps: mixing a matrix resin, a modified polymerization monomer, a composite filler, a tackifying resin, an ultraviolet light delayed curing agent, a photobase generating agent, a photoinitiator, an antioxidant, and a solvent, stirring to obtain a UV glue; applying the UV glue to the surface of a substrate blue film, drying to obtain an adhesive layer, and laminating a release film on the surface of the adhesive layer to obtain a UV tape. Soy protein isolate is complexed with metal impurities such as iron, chromium, calcium, magnesium, and sodium in montmorillonite to avoid falling off; the UV tape includes a photobase generating agent, a photoinitiator, and an ultraviolet light delayed curing agent for coordinated use, triggering the preliminary curing of the UV glue, and then laminating the battery surface, so as to achieve a fixing effect within 1-2 hours, and avoid the UV tape curing speed being fast, resulting in uneven curing of the UV tape on the battery, and a short operating time, which affects the battery quality.

The invention discloses a liquid-liquid extraction dearomatization process and system, and belongs to the field of petrochemical industry. According to the process, N, N '-dialkyl pyrrolidone and / or N, N'-dioxypyrrolidone is used as an extraction solvent, and separation is completed through four steps of liquid-liquid extraction, raffinate oil rectification, back extraction and solvent and aromatic hydrocarbon recovery. The aromatic hydrocarbon selectivity and dissolving capacity are enhanced through the double-ring synergistic effect of the twin-structure solvent, the problems that an existing monocyclic solvent is low in selectivity and large in agent-oil ratio, and water washing is needed for solvent recovery are solved, raw material pretreatment and a cosolvent are not needed in the process, the aromatic hydrocarbon recovery rate reaches 85% or above, the solvent recovery rate exceeds 91%, and the method is suitable for industrial production. The method is suitable for high-efficiency separation of aromatic hydrocarbons and non-aromatic hydrocarbons of various fuel oils such as straight-run diesel oil, catalytic diesel oil and reformed gasoline.

The invention relates to the technical field of casting shell-making materials, and particularly discloses compound crystal sand powder and a preparation method thereof. The invention relates to a preparation method of compound crystal sand powder, which comprises the following steps: 1) separating and purifying bauxite to obtain refined bauxite; 2) taking carrageenan and tetrabutylphosphorus hydroxide, uniformly mixing, drying, performing first-stage calcination treatment, and grinding to obtain a first calcined material; mixing and grinding aluminum powder, silicon powder and the first calcined material, then carrying out second-stage calcining treatment under vacuum, and grinding to obtain a second calcined material; and (3) uniformly mixing the refined bauxite, the second calcined material and the multi-element metal doping material, then adding a modifier, and grinding, thereby obtaining the product, the multi-element metal doping material is prepared from at least two of nano titanium oxide, nano ferrite, nano zirconium oxide and nano zinc oxide. The prepared composite crystal sand powder has the advantages of being low in linear expansion coefficient, high in true porosity after sintering, high in slag corrosion resistance and high in thermal shock resistance.

This invention relates to the field of organic electroluminescent devices, and discloses a silicon-containing organic compound, its application, and an organic electroluminescent device. The compound has the structure shown in formula (I). The aforementioned organic compound provided by this invention has a high glass transition temperature, a high decomposition temperature, and a high refractive index. When applied as a capping layer on a device, it can improve the light extraction efficiency of the cathode, thereby improving the luminous efficiency of the device.

The invention relates to a dispersing agent and a preparation method thereof, an electrode material and a secondary battery, the dispersing agent comprises a first component and a second component, the first component comprises a nonionic polymer, the weight-average molecular weight of the nonionic polymer is 5000-80000, the second component comprises an organic compound containing at least one of carboxyl, hydroxyl and amino, and the weight-average molecular weight of the nonionic polymer is 5000-80000. The boiling point of the second component is greater than or equal to 250 DEG C. The dispersant can solve the problems of slurry thickening and pole piece cracking caused by component volatilization.

This invention provides a method for preparing bisphenol A-bis(diphenyl phosphate), comprising the following steps: 1) mixing a catalyst, bisphenol A-bis(diphenyl phosphate), and phosphorus oxychloride uniformly to obtain a mixed solution; 2) heating bisphenol A to a liquid state and continuously feeding it and the mixed solution from step 1) into an esterification reactor for esterification reaction, followed by removal of phosphorus oxychloride to obtain an intermediate reaction solution; 3) preheating phenol and the intermediate reaction solution from step 2), and continuously feeding them into a sealing reactor for sealing reaction, followed by removal of phenol to obtain bisphenol A-bis(diphenyl phosphate). This method allows for all-liquid phase feeding, resulting in a high yield of the flame retardant BDP and a low content of impurity Z in the product.

This application provides an extreme pressure anti-wear hydraulic oil and its preparation method. The raw materials for preparing the extreme pressure anti-wear hydraulic oil include the following components in parts by weight: 80-90 parts by weight of base oil, 2-5 parts by weight of antioxidant, 1-3 parts by weight of rust inhibitor, 0.5-1 parts by weight of pour point depressant, and 0.2-0.5 parts by weight of extreme pressure anti-wear agent; the extreme pressure anti-wear agent is obtained by mixing boronamide and ammonium phosphate ionic liquid in a weight ratio of 1:0.5-1. The preparation method includes the following steps: (1) mixing the base oil and antioxidant in parts by weight, stirring for 10-20 minutes at a temperature of 40-50℃ to obtain a first mixture; (2) adding the rust inhibitor, pour point depressant, and boronamide and ammonium phosphate ionic liquid in parts by weight to the first mixture, heating and refining to obtain the extreme pressure anti-wear hydraulic oil. This application achieves long-term stable operation of the extreme pressure anti-wear hydraulic oil under extreme pressure conditions.

The invention discloses a low-density flame-retardant PP mesh cable filling rope, and belongs to the technical field of filling rope processing. The technical problem that in the prior art, the flame retardant property of a PP net-shaped cable filling rope and the utilization rate of a foaming agent potassium bicarbonate need to be further improved is solved. The preparation method comprises the following steps: preparing modified polypropylene resin of which the side chain has a char-forming dehydration group, siloxane and a foaming agent, and preparing a foaming nucleating agent which takes amidated graphene oxide as a substrate material and is internally filled with mixed powder modified by an aluminate coupling agent in an intercalation manner, the foaming nucleating agent promotes heterogeneous nucleation of the modified polypropylene resin and releases gas at the same time, so that the density of the modified polypropylene resin material is reduced, the mechanical property of the modified polypropylene resin material is enhanced, and in the combustion process, the foaming nucleating agent is matched with functional groups of side chains of the modified polypropylene resin to improve the flame retardant property of the modified polypropylene resin material; finally, the wear-resistant, low-density, high-temperature-resistant and flame-retardant net-shaped PP filling rope is prepared.

The application provides a nitrogen-containing fused aromatic ring compound and an organic electroluminescent device thereof, and relates to the technical field of organic electroluminescent materials. In order to solve the problems existing in the prior art of organic electroluminescent materials and devices, the application provides a nitrogen-containing fused aromatic ring compound, which is applied to an organic electroluminescent device as a host material of an electron transport layer, a hole blocking layer and a light-emitting layer, so that the luminous efficiency, driving voltage and service life of the device can be effectively improved. The novel nitrogen-containing fused aromatic ring organic compound has a high triplet energy level, appropriate HOMO / LUMO energy level, high electron affinity and electron mobility, is conducive to the transmission of electrons, balances the transmission of holes and electrons, and has a high decomposition temperature and glass transition temperature and good film-forming property, so that the stability and high efficiency of the device can be effectively ensured, and the luminous efficiency of the organic electroluminescent device can be significantly improved when the compound is applied to the organic electroluminescent device as a host material of a light-emitting layer.

The invention discloses a method for preparing foam metal through friction stir welding, and belongs to the technical field of foam metal material preparation, and the method comprises the following steps: an alloy plate is used as a raw material, and the plate is firstly machined to form a groove for filling foaming agent powder and foaming auxiliary powder; preparing foaming agent powder and foaming auxiliary powder according to a certain proportion, and mixing the powder to prepare a powder mixture; filling the powder mixture into a groove of an alloy plate, and preparing the alloy plate filled with the mixed powder into a welding plate by adopting a friction stir welding technology; the welded plate is subjected to multi-pass rolling to form a rolled plate; compared with the prior art, the method has the advantages that porosity control and pore diameter adjustment in the foaming process are facilitated, distribution and microstructure of foaming agent mixed powder can be remarkably improved, and formation of a pore structure is facilitated.

The utility model belongs to the technical field of silica gel foam, and particularly relates to ceramic silica gel foam which comprises a graphite layer, a polyester film layer, composite ceramic foam and a self-adhesive tape layer which are sequentially arranged from top to bottom. Every two of the graphite layer, the polyester film layer, the composite ceramic foam and the self-adhesive tape layer are attached to each other in sequence, and the fireproof and heat-insulation insulating performance of the silica gel foam is improved to a great extent through the structural arrangement.