39results about How to "Improve thermal stability" patented technology

Belonging to the technical field of batteries, the invention relates to a non-aqueous solution aluminum ion secondary battery and a preparation method thereof. The secondary battery can be widely applied in electronics, communication, electric vehicle and other fields. The aluminum ion battery provided by the invention contains a battery anode, a battery cathode, a diaphragm and an aluminum-containing non-aqueous solution electrolyte. Specifically, the cathode active material can be carbon, graphite, carbon nanotube, graphene, super carbon, WS2 and MoS2, V2O5, TiO2 and other materials having nano-layered, tubular, linear and other structures, and the anode is aluminum-containing metal or alloy. The non-aqueous solution aluminum ion secondary battery provided by the invention has the characteristics of high specific capacity, high coulomb efficiency, long service life and environmental protection, safety and reliability, stable cycle performance, and quick charging, etc.

The present invention relates to preparation process of precursor fiber of cellulose base carbon fiber in chemical fiber production. The preparation process includes mixing concentrated NMMO aqua and carbon black for carbon black water in the weight ratio of 20-10000, decomprssion distillation to obtain NMMO / carbon black solution with water content 24-28 wt%, adding the mixtue of sliced cellulose pulp and NMMO / carbon black solution in the weight ratio of 5-15 to 100 into dissolving reactor, swelling and stirring at 70-90 deg.c, raising the temperature to 90-120 deg.c, stirring and decomprssion distillation to eliminate water and form cellulose / NMMO / carbon black spinning liquid with water content of 12-14 wt%, and dry-wet spinning to obtain the precursor fiber. The present invention has high carbonizing yield, high mechanical performance of the carbon fiber, raised spinnability of the spinning liquid, non-toxic solvent, high solvent recovering rate and environment friendship.

The invention provides an acetylacetone-based composite thermal stabilizer which is a mixture obtained by mixing zinc acetylacetonate, calcium acetylacetonate or magnesium acetylacetonate and hydrotalcite pro rata. The composite thermal stabilizer is suitable for chloride-containing high polymer, such as polyvinyl chloride, chlorinated polyethylene, chlorinated polyvinyl chloride, copolymer of vinyl chloride-ethylene or copolymer of vinyl chloride-vinyl acetate, has better thermal stability, prolongs the thermal aging time of the chloride-containing high polymer, and overcomes the shortcomings of poor long-term performance of single stabilizer of zinc acetylacetonate, poor transparency of stabilizer of calcium acetylacetonate, and poor initial colorability of stabilizer of hydrotalcite. The composite thermal stabilizer has low cost, good initial colorability, excellent long-term performance and good transparency, and is an efficient composite thermal stabilizer.

The present invention belongs to the field of lithium-ion batteries, and provide a modified lithium-ion battery positive electrode material LiNi1-xCoxO2@LiAlO2 with high thermal-stability LiAlO2 coated on the LiNi1-xCoxO2 surface, and a preparation method thereof. A purpose of the present invention is to overcome the disadvantages of overcharging intolerance and pool thermal-stability of the lithium-ion battery LiNi1-xCoxO2 (x is more than 0 and is less than or equal to 0.5) positive electrode material. According to the present invention, the positive electrode material of the present invention has characteristics of good thermal-stability, good discharge specific capacity and excellent cycle stability compared with the LiNi1-xCoxO2 positive electrode material, can meet the large rate charge and discharge requirements, and is especially suitable for the positive electrode material of the electric vehicle power battery; and the product prepared through the preparation method has characteristics of high purity, high chemical uniformity, good coating effect, high crystal quality, fine particle, uniform distribution, excellent electrochemical performance and low manufacturing cost.

The invention provides a rubber material formulation for a high fatigue resistant rubber diaphragm of an automobile brake chamber, which is mainly prepared by natural rubber (NR), styrene butadiene rubber (SBR), polybutylene terephthalate (PBT), vulcanizing agent, zinc oxides, stearic acid, anti-aging agent, dispersant, accelerant, carbon black, aromatic oil and white carbon black. The physical mechanical properties of the rubber diaphragm of the automobile brake chamber prepared by the rubber formulation all reach the novel standard drafted by the Society of Automotive Engineering (SAE) of America; the service life of a platform of the rubber diaphragm reaches over 2 million times; the platform has the advantages of high stress at definite elongation, strength and elongation property, compression fatigue resistivity, flexural deformation resistance and attrition resistance, and maintenance of small variation of the material characteristics within the wide use temperature between 55 and 100 DEG C when the material is used; and the service life of the platform is basically the same as that of an air brake assembly, and resource conservation is greatly promoted simultaneously, thereby realizing conversion of the platform from 'a wearing part' to 'a permanent part'.

The invention relates to the technical field of semiconductor integrated circuits, in particular to a high-entropy alloy diffusion barrier layer for a Cu interconnect integrated circuit and a preparation method of the high-entropy alloy diffusion barrier layer for the Cu interconnect integrated circuit. The high-entropy alloy diffusion barrier layer for the Cu interconnect integrated circuit sequentially comprises a Si substrate layer, a high-entropy alloy intermediate coating and a Cu film from bottom to top, wherein the high-entropy alloy intermediate coating sequentially comprises a third coating, a second coating and a first coating from bottom to top; the first coating is an AlCrTaTiZrMo high-entropy alloy coating; the second coating is a pure Ti coating; and the third coating is an AlCrTaTiZrMoNx high-entropy alloy coating. According to the high-entropy alloy diffusion barrier layer for the Cu interconnect integrated circuit, improvement of the atomic bulk density is facilitated,generation of defects, such as vacancies is reduced, a diffusion channel for atoms is reduced, and the diffusion barrier performance and the heat stability of the high-entropy alloy coatings are improved.

The invention discloses a naphthalimide-selenophene-based organic n-type semiconductor polymer material, a preparation method and application thereof, in particular to an n-type organic conjugated polymer semiconductor material based on long-chain naphthalimide as an electron pulling unit and selenophene and biselenophene and terselenophene as derivatives as an electron feeding unit and a preparation method thereof, and application of the polymer as a cathode interface modification layer material in a perovskite solar cell. The naphthalimide and selenophene derivative based n-type conjugated polymer semiconductor disclosed by the invention has the advantages of solution processing, high electron mobility, excellent thermal stability, appropriate energy level and the like, and is an ideal perovskite solar cell cathode interface modification material.

The invention discloses a metal complex and an OLED (Organic Light Emitting Device) thereof, and relates to the technical field of organic photoelectric materials. The metal complex has a structure asshown in a formula (I), wherein an electron-rich dinitrogen coordination structure in the structure of the metal complex is beneficial for stabilizing central trivalent metal cations, and meanwhile,electron cloud distribution on metal iridium can also be affected, so that great influence to the photoelectric properties of a whole complex molecule can be generated; a quaternary ring formed by a ligand of the dinitrogen coordination structure and metal has stronger rigidity and is beneficial for reducing unnecessary vibration energy loss and realizing high-efficiency luminescence property. Byregulating substituent groups, the metal complex has better thermal stability and chemical property; by preparing the metal complex into a device and particularly using the metal complex as a doping material, the device has the advantages of low driving voltage and high luminous efficiency and is superior to a commonly used OLED.

The invention discloses a modified polyurethane acrylic resin, which is prepared by polymerization among hydroxyl acrylate, diisocyanate, alkylated 4,4'-dicyclohexanol, and polyester / polyether glycol. The invention provides a method of preparing the modified polyurethane acrylic resin at the same time. The provided modified polyurethane acrylic resin does not contain active functional group such as phenyl ring, amino group, or the like, so the modified polyurethane acrylic resin will not become yellow even if the modified polyurethane acrylic resin is irradiated by light, and the weatherability is good. The resin can be applied to an adhesive, and has a good waterproof performance, good anti-falling performance, good drug resistant property, and excellent thermal stability.

The invention discloses a camera and a double-ring glass component thereof. The camera comprises a front cylinder component, a rear cylinder component and a machine core component. The front cylinder component comprises a front cylinder and the double-ring glass component; the front cylinder has a cylindrical structure with two open ends; one end of the front cylinder is closed by the double-ring glass component, and the other end of the front cylinder is connected with the rear cylinder component; the double-ring glass component comprises a light-transmitting ring, a light-transmitting sheet and a ray isolation ring; and the light-transmitting ring is sleeved outside the ray isolation ring, while the light-transmitting sheet is arranged inside the ray isolation ring, and the light-transmitting ring is made of acrylics. When the camera of the double-ring glass component based on the technical scheme adopted by the invention is adopted, because the light-transmitting ring is made of acrylics, the impact resistance of the acrylic light-transmitting ring is 200 times that of a glass light-transmitting ring, so the light-transmitting ring is not broken by shock, and the shock resistance of the camera can be improved; moreover, the thermal stability is better than that of the glass light-transmitting ring, so the glass light-transmitting ring is not ruptured by thermal shock, and the performance of the camera can be greatly improved.

The invention provides preparation of a novel fluorescent imprinting sensor based on a magnetic metal organic framework (MOF), and the novel fluorescent imprinting sensor is successfully used for detection of hepatitis virus a (HAV). In the invention, light emitting MOF (MIL-101-NH2) is introduced to replace quantum dots and organic dyes to serve as output signals. The light emitting MOF materialcan not only be used as the output signals, but also can be used as a carrier. Meanwhile, the metal organic framework has a larger specific surface area, and thus can provide more imprinting sites, thereby improving the response sensitivity of the sensor; due to the combination of ferric oxide particles and the MIL-101-NH2 material, the process of preparing an imprinting polymer is simpler and faster; and a fluorescence analysis method has the advantages of high sensitivity, stronger selectivity, convenient operation and so on. Therefore, by combining the above several advantages, compared with other analysis methods or sensors, the molecular imprinting fluorescent chemical sensor constructed by the invention has good selectivity for template molecules and high detection sensitivity. The results show that the method is simple, convenient and fast, can be used for the qualitative and quantitative detection of HAV, and has important practical potential and significance in biosensing andvirus detection and prevention.

The invention discloses a plasma preparation method of polystyrene fluorescent microspheres and reaction equipment of the plasma preparation method, and relates to the technical field of organic synthesis of fluorescent microspheres. A rare earth organic complex is adopted as a starting raw material, plasma of polystyrene is polymerized on the surface of the rare earth organic complex to coat the surface of the rare earth organic complex with a layer of polystyrene, and thus polystyrene fluorescent microspheres are formed. The method includes the main steps of 1, performing plasma pretreatment of the rare earth organic complex; 2, performing plasma polymerization, wherein plasma of polystyrene monomers is polymerized and deposited on the surface of the rare earth organic complex. The polystyrene fluorescent microspheres obtained through the preparation method have a long fluorescent lifetime and good heat stability, and the preparation process is simple, easy to perform and free of environmental pollution.

The invention discloses an LED lamp with water-proof and dust-proof functions. The LED lamp with the water-proof and dust-proof functions comprises a lamp holder shell, a lampshade, a light source plate and a radiating base, wherein a plurality of ventilating passages for air circulation are formed inside the radiating base; an insulating block used for connecting the radiating base and the lampshade is arranged between the radiating base and the lampshade; a step part is formed in one side, facing to the radiating base, of the insulating block, the radiating base is attached to the step part, and an air inlet communicated with the ventilating passages is informed between the radiating base and the insulating block; one side, facing to the lampshade, of the insulating block, extends to form a stopping edge with a surrounding periphery, and the light source plate and the lampshade are mounted inside the stopping edge; a connecting piece used for connecting the radiating base and the lamp holder shell is further arranged between the radiating base and the lamp holder shell; a plurality of exhaust passages communicated with the ventilating passages and the outside are further arranged on the connecting piece; and the air inlet, the ventilating passages and the exhaust passages are in communication in sequence to form air circulation passages. According to the LED lamp provided by the invention, air circulation heat dissipation is performed through the ventilating passages, and the insulating block is used for preventing the light source plate from being impacted by water and dust.

The invention discloses an anti-flaming thermal-insulation environmentally friendly polymeric foaming material and a method for producing the material. The method comprises the following steps: preparing a urea resin foam adhesive by successively adding 37 % of formaldehyde, polyvinyl alcohol and glycerin in a reaction kettle and stirring to heat up and then adding urea, hexamethylene tetramine, stabilizer and thiourea, preparing a foaming agent by firstly adding water in a stirring tank, successively adding nekal and nonylphenol polyoxylethylene ether with stirring, heating up for completely dissolving, and then adding phosphoric acid, glycerin and sodium phosphate, uniformly stirring until completely dissolving, and discharging and packaging, and preparing a foamed product by taking the urea resin adhesive, urea and the foaming agent, mixing and stirring uniformly, putting in a foaming machine to foam, and carrying out foaming, extrusion molding, drying and packaging. The invention can be widely applied in thermal insulation of building facilities, thermal insulation of venue decoration, shock absorption, replacement of benzene plate flexible package without anti-flaming property, and the like.

The disclosure provides a microcapsule type thermochromic pigment and a preparation method and use thereof, and a thermochromic ink and use thereof. The microcapsule type thermochromic pigment provided by the disclosure includes a core material and a wall material wrapping the core material, wherein the core material includes the following components: a leuco dye, a developer and stearic acid 2-[4-(phenylmethoxy)phenyl]ethyl ester, and the wall material is self-emulsifying polyurethane or self-emulsifying epoxy resin.

The invention relates to a composite quality control product of a liver function, and a preparation method and application thereof, wherein the composite quality control product comprises alpha-L-fucosidase, adenosine deaminase and 5'-nucleotidase; and the preparation method comprises the following steps of: taking a fresh pork liver as a raw material, and obtaining the composite quality control product of the liver function simultaneously containing three kinds of enzymes through processes of grinding, homogenizing, crushing, centrifuging, salting-out, purifying, ultrafiltration, freeze-drying and the like. By optimizing preparation process parameters, enzyme inactivation in the preparation process is avoided; meanwhile, impurities in the finished product are reduced; therefore, the purity of the target enzyme is improved; furthermore, the freeze-dried powder of the composite quality control product with better stability is obtained through a freeze-drying process; furthermore, a protective agent of enzyme solution is optimized, so that the thermal stability and long-term stability of the freeze-dried powder of the composite quality control product are enhanced; and thus, the composite quality control product of the liver function, which is simple and rapid in preparation method, low in cost and high in enzyme activity, uniformity and stability, is obtained.

The invention relates to the technical field of stretching lubricating oil and preparation thereof, in particular to antibacterial easy-to-clean water-soluble drawing oil and a preparation method thereof. The water-soluble drawing oil is prepared from the following components in parts by weight: 25-50 parts of synthetic oil, 10-15 parts of base oil, 5-10 parts of an emulsifier, 8-10 parts of a reinforcing agent, 7-10 parts of a surfactant, 1.5-3.0 parts of a bacteriostatic agent, 16-20 parts of an extreme pressure anti-wear agent, 6-10 parts of a metal cleaning agent and 4-5 parts of a rapid defoaming agent. The water-soluble drawing oil is prepared by mixing and stirring the components and heating. The problems that in the prior art, water-soluble drawing oil is prone to bacteria generation, large in foam and poor in cleaning effect are solved, and the provided water-soluble drawing oil has the advantages of being good in compression resistance and abrasion resistance, good in antibacterial effect, capable of achieving rapid defoaming and easy to clean.

The invention relates to a differential pressure densimeter pressure protection device which comprises a corrugated pipe, a pressing cover, a spring and a corrugated pipe base. The corrugated pipe is arranged on the corrugated pipe base. The spring is connected to the outer portion of the pressing cover in a sleeved mode. A corrugated pipe inner cavity is arranged in the corrugated pipe. A channel which is communicated with the corrugated pipe inner cavity is arranged on the corrugated pipe base. The spring is pressed on the corrugated pipe through the pressing cover. The differential pressure densimeter pressure protection device is good in stability and can avoid waste.

The invention discloses a lithium-ion battery positive pole piece which comprises a current collector and a positive active material layer coating the surface of the current collector, the positive active material layer mainly comprises a positive active material, a conductive agent, additives and a binder, and the additives are aluminum phosphate and lithium phosphate. The preparation method comprises the following steps: (1) uniformly mixing the positive electrode active material, the binder, the conductive agent, the aluminum phosphate, the lithium phosphate and an organic solvent to obtainpositive electrode slurry; and (2) coating the surface of the current collector with the positive pole slurry, and drying to obtain the positive pole piece of a lithium-ion battery. The aluminum phosphate and the lithium phosphate are introduced into the positive active material layer of the positive pole piece of the lithium-ion battery at the same time to serve as the additives, and the comprehensive electrical properties such as high-temperature cycle, high-temperature storage performance and rate capability of the battery are synergistically improved.

The invention provides a thermal-closed-pore composite diaphragm and a preparation method and application thereof, the thermal-closed-pore composite diaphragm comprises a thermosensitive coating and a base film, and at least one surface of the base film is provided with the thermosensitive coating; the thermosensitive coating comprises thermosensitive particles; the thermosensitive particle comprises a shell layer and a core, the shell layer comprises polydopamine, and the core comprises polymer particles and ceramic particles. According to the invention, thermosensitive particles with a core-shell structure are adopted to realize a pore closing effect, and a polydopamine shell layer has excellent thermal stability, so that the dimensional stability of the composite diaphragm under a high-temperature condition is favorably improved; the polydopamine coated on the surfaces of the polymer particles and the ceramic particles can adhere part of the polymer particles to the surfaces of the ceramic particles, so that the composite diaphragm has high dimensional stability; meanwhile, the polydopamine has relatively high polarity, so that the wettability between the diaphragm and an electrolyte can be greatly improved, the ionic conductivity and the lithium ion transference number of the diaphragm are improved, and the battery performance is improved.

The invention discloses a resistant dextrin synthesis technology, which comprises the following steps: 1) using maltodextrin as a raw material, respectively adding glucose and citric acid, and uniformly stirring to obtain a maltodextrin mixture; 2) uniformly stirring the above maltodextrin mixture at the negative pressure of 0.05-0.1 MPa and at the temperature of 130-180 DEG C, and reacting for 2-5 h to prepare a solid crude product; 3) dissolving the above solid crude product by the use of 50-90 DEG C of hot water to obtain a solution with the mass concentration of 5-10%, and adjusting pH of the solution to 3-5; and 4) carrying out activated carbon decoloration on the solution obtained in the step (3), carrying out ion-exchange to obtain an ion exchange liquid, and spray-drying the ion exchange liquid by a spray dryer to finally obtain a yellowish powder product. In comparison with the prior art, the method breaks the tradition that starch is used as a single raw material and the synthesis field of resistant dextrin is broadened. In addition, the method also has advantages of low energy consumption, high conversion rate, short reaction time, simple process, low cost and the like.

The invention discloses a special unsaturated polyester resin adhesive for a quartz stone sheet material. The special unsaturated polyester resin adhesive is prepared from the following raw materials: unsaturated polyester resin, acrylic acid-2-hydroxyethyl ester, pentaerythritol triacrylate, 2-methyl-1-(4-methylthiophenyl)-2-morpholinyl-1-acetone, biphenyl-(2,4,6-trimethylbenzoyl)phosphine oxide, a flatting agent, a de-foaming agent, a silane coupling agent, gas-phase silicon dioxide, glass microsphere and modified aluminum hydroxide. The special unsaturated polyester resin adhesive for the quartz stone sheet material, provided by the invention, has high binding performance, good impacting toughness and excellent flame-retarding performance.

The invention relates to a surface treatment method of a car part of inert material. The surface treatment method comprises the following steps of: firstly, putting a working piece in a closed hollow cavity so that the surface of the working piece to be processed is fully exposed in the hollow cavity; then, pumping air in the hollow cavity; injecting fluorinated gases in the hollow cavity so that the fluorinated volume of the gases in the hollow cavity is 10-20 percent; keeping gas pressure in the hollow cavity as 380-420 mbar so that molecular replacement is carried out between fluorine atoms in the gases and fluorine atoms on the surface of the working piece, and C-F keys are formed on the surface of the working piece; and finally, removing residual fluorinated gases in the hollow cavity and taking out the working piece from the hollow cavity. After the working piece is processed, the surface adhesion is improved, and the surface wettability of the working piece is improved by a coating. Because the C-F keys have high key energy, the working piece has excellent heat stability and chemical inertia and good anti-leakage performance. The invention does not damage the working piece material by even treatment and has high qualified product rate, high production efficiency and low production cost.

The invention discloses a stable organic solar cell and a preparation method thereof. The preparation method comprises the following steps: spin-coating a ZnO precursor solution on an ITO layer so asto prepare an electron transmission layer; then spin-coating a C60-SAM solution to serve as a modification layer; dissolving a donor material and a receptor material; spin-coating the dissolved materials on the modification layer; evaporating molybdenum oxide; and evaporating silver to serve as a positive electrode of the cell so as to prepare the stable organic solar cell. According to the organic solar cell, a green solvent o-xylene is used for replacing chlorobenzene to serve as a processing solvent of an active layer innovatively, so that the illumination stability is improved; and the modification layer is used for modifying the zinc oxide electron transmission layer innovatively, so that the energy conversion efficiency and the thermal stability are improved. The solar cell has relatively high energy conversion efficiency and excellent illumination stability.

The invention discloses a PVC (Polyvinyl Chloride) composite modified material and a preparation method thereof, relates to a PVC modified material and a preparation method thereof, and aims to solve the problems that a product surface is rough and lusterless as a conventional PVC modified material has a certain amount of unsaturated double bonds on a molecular chain, an active center can be formed and thus the ductility is low and a melt is easily crushed. The PVC composite modified material is prepared from the following components in parts by weight: a PVC resin, a low-temperature flexibilizer, an impact modifier, processing aids, a surfactant, a composite stabilizer, a covering agent, an initiator and a cross-linking agent. The preparation method comprises the following steps: I, weighing; II, premixing so as to obtain a premix; III, mixing at different steps so as to obtain mixtures of different steps; IV, performing final mixing so as to obtain a final mixture; and V, performing extrusion pelletizing, thereby obtaining the PVC composite modified material. The invention aims to prepare the PVC composite modified material.