19results about How to "Reduced thermal stability" patented technology

The invention relates to an easily-activated Ti-Fe-Y-Mn-Zr-Co-Zn-based hydrogen storage alloy and a preparation method thereof, belongs to the technical field of hydrogen storage alloy materials, and solves at least one of the problems of high activation difficulty, long activation period, poor hydrogen absorption and desorption dynamic performance and the like of a Ti-Fe-based hydrogen storage alloy in the prior art. The invention provides a Ti-Fe-Y-Mn-Zr-Co-Zn based hydrogen storage alloy easy to activate, the chemical formula of the hydrogen storage alloy is Ti 1.15, Fe 0.8, Y 0.03, Mn 0.35-x-y-z ZrxCoyZnz, x, y and z are atomic ratios, x is larger than or equal to 0.05 and smaller than or equal to 0.15, y is larger than or equal to 0.02 and smaller than or equal to 0.1, and z is larger than or equal to 0.02 and smaller than or equal to 0.1. The Ti-Fe-Y-Mn-Zr-Co-Zn based hydrogen storage alloy provided by the invention obtains good activation performance and hydrogen absorption and desorption performance by means of component design and preparation process improvement, can be activated at one time under the conditions of 30 DEG C and 3 MPa, and has the hydrogen storage capacity of more than or equal to 1.69 wt.%, the hydrogen absorption platform pressure of more than or equal to 0.39 MPa and the hydrogen desorption platform pressure of more than or equal to 0.3 MPa.

The invention relates to a hydrated borate micromolecule with a boron-nitrogen coordination bond, a derivative resin material and a preparation method of the hydrated borate micromolecule. The preparation method comprises the following steps: S1, synthesizing boron-nitrogen coordination micromolecules: dissolving and reacting boric acid, a derivative thereof and a polyfunctional group amine compound at room temperature through a solution reaction to obtain the boron-nitrogen coordination micromolecules; the borate micromolecule NCBW-X with intramolecular boron and nitrogen coordination is formed; s2, the NCBW-X micromolecule can be used for curing epoxy resin and synthesizing materials such as phenolic resin through end-NH2 and end-OH on two sides, the NCBW-X improves the mechanical property of each system through a rigid eight-membered ring, boron-nitrogen coordination of the NCBW-X can generate hydration, the environmental endurance is improved on the premise of retaining the original dynamic nature of boric acid ester of the NCBW-X, and the service life of the NCBW-X micromolecule is prolonged. Meanwhile, due to the dynamic reversibility of the NCBW-X, the NCBW-X is used for curing epoxy resin, and materials such as phenolic resin and the like are improved to a certain extent in the aspects of self-repairing and recycling.

The invention relates to the technical field of self-repairing high polymer materials, and discloses self-healing tannic acid-based polyurethane as well as a preparation method and application thereof, tannic acid is taken as a cross-linking agent, castor oil is taken as polyol of polyurethane, isophorone diisocyanate is taken as polyisocyanate of polyurethane, bis (2-ethoxyl) disulfide and 1, 3-butanediol are taken as a crosslinking agent, and the self-healing tannic acid-based polyurethane is prepared by a one-step method. The preparation method comprises the following steps: by taking 1, 4-butanediol as a chain extender of polyurethane, preparing tannic acid-based polyurethane on the basis of a prepolymer method; the self-healing temperature of the tannic acid-based polyurethane film prepared from the tannic acid-based polyurethane is 80 DEG C, and the self-repairing efficiency is as high as 95%.

The invention belongs to the technical field of high polymer materials, and particularly provides a low-temperature-resistant toughened polyamide 66 composite material and a preparation method thereof, and the polyamide 66 composite material comprises the following components in parts by weight: 86-95 parts of polyamide 66, 5-10 parts of a toughening agent, 0.5-2 parts of a flow modifier, 0.25-0.5 part of a lubricant, 0.25-0.75 part of an antioxidant and 0.5-2 parts of black master batch. According to the low-temperature-resistant toughened polyamide 66 composite material disclosed by the invention, the polyamide 66 material is subjected to toughening and fluidity modification by using the self-made toughening agent and the organic silicon flow modifier, so that the low-temperature-resistant toughened polyamide 66 composite material is obtained. The composite material has good low-temperature toughness and fluidity, is simple in preparation process and low in cost, and can be used for ribbons, buckles, wire slots, pipe clamps and the like on electric automobiles or industrial equipment in extremely cold environments.

The invention relates to intrinsic flame-retardant bio-based epoxy resin and a synthesis method thereof.The intrinsic flame-retardant bio-based epoxy resin takes magnolol as a main raw material, and the molecular structure contains biphenyl units and ester bonds, so that the intrinsic flame-retardant bio-based epoxy resin has excellent flame retardance and thermal performance. The synthesis method comprises the following three steps: firstly, reacting magnolol with halogenated alkane to generate a precursor; secondly, reacting the precursor with acyl chloride to generate an intermediate; finally, oxidizing the intermediate to generate the target epoxy resin. The method does not need to add a large amount of flame retardant, and avoids negative influence on the performance of the epoxy resin. The synthesized epoxy resin shows excellent flame retardance and heat resistance, has high carbon residue rate, glass transition temperature and thermal decomposition temperature, and has the flame retardant level reaching V-0 level which is superior to that of general epoxy resin.

The invention discloses a konjak taro ball capable of keeping chewy at low temperature and a preparation method thereof, and belongs to the technical field of konjak taro ball preparation, the konjak taro ball comprises the following components by weight: 15-35 parts of konjak powder, 5-15 parts of tapioca flour, 1-2 parts of a sweetener, 3-5 parts of cranberry pulp, 1-3 parts of vaccinium bracteatum thunb juice, and 40-75 parts of water. Through a specific formula and a specific processing technology, the konjak balls can keep the elastic characteristic at low temperature, and the problem that the quality of the konjak balls is reduced at low temperature in the prior art is solved.

The present application relates to the technical field of environmental microbial degradation of plastics, and particularly relates to a non-decarboxylation klebsiella SW-03 and application thereof in degrading PLA / PBAT plastics, the non-decarboxylation klebsiella SW-03 strain is preserved in Guangdong Microbial Culture Collection Center on December 5, 2025, the preservation number is GDMCC NO:67412, and the preservation address is the 5th floor of the 59th building of the Institute of Microbiology, Guangdong Academy of Sciences, 100, Middle Martyrs Road, Guangzhou City; the non-decarboxylation klebsiella SW-03 is isolated from eutrophic lake environment, can take PLA / PBAT plastics as the only carbon source, realizes the biodegradation of PLA / PBAT plastic film under normal temperature environment, and solves the problems of the current plastic degradation functional strain resource shortage and limited application scene.

The invention relates to the field of building materials, and particularly discloses concrete for a prefabricated lining segment and a preparation method of the concrete. The invention discloses concrete for a prefabricated lining segment. The concrete is prepared from the following raw materials in parts by weight: 380 to 400 parts of cement, 720 to 750 parts of sand, 1135 to 1200 parts of stones, 130 to 150 parts of water, 50 to 60 parts of fly ash, 5.16 to 5.5 parts of an additive, 90 to 100 parts of modified polycrystalline mullite fibers and 45 to 50 parts of porous filler, the modified polycrystalline mullite fiber comprises polycrystalline mullite fiber and alumina nanowire aerogel loaded on the surface of the polycrystalline mullite fiber, and the mass ratio of the polycrystalline mullite fiber to the alumina nanowire aerogel is 1: (0.2-0.4). The concrete for the lining segment is high in compressive strength, good in crack resistance, excellent in high-temperature resistance, high in fire resistance and not prone to cracking at the high temperature.

The invention relates to a carbon fiber and potassium titanate whisker synergistically enhanced wear-resistant thermotropic liquid crystal polymer composite material and a preparation method thereof, and belongs to the technical field of material preparation. The composite material is formed by compounding a lubricant, carbon fibers (CF), potassium titanate whiskers (PTW) and a thermotropic liquid crystal polymer (TLCP), wherein the total addition amount of the CF and the PTW is 25wt% of the TLCP; and the lubricant is PTFE and graphite. The method comprises the following steps: 1) preparing a thermotropic liquid crystal polymer by a one-pot method; (2) carrying out surface modification on the potassium titanate whiskers by utilizing a silane coupling agent; and 3) dispersing the carbon fiber, the potassium titanate whisker / modified potassium titanate whisker and a lubricant in the thermotropic liquid crystal polymer to form a uniform carbon fiber / potassium titanate whisker / thermotropic liquid crystal polymer dispersion system. According to the invention, the dispersibility and compatibility of the potassium titanate whisker in a matrix can be obviously improved, the mechanical property and wear resistance of the thermotropic liquid crystal polymer are enhanced, the preparation process is simple, the production cost is low, the reaction condition is mild, batch production can be realized, and the special requirements of multiple fields such as aerospace and civil industry on resin materials can be met.

The invention discloses a heat-conducting and hydrophobic modified phosphorus-nitrogen halogen-free flame retardant chitosan aerogel as well as a preparation method and application thereof, and belongs to the technical field of aerogel preparation. The invention provides a preparation method of heat-conducting, hydrophobic and flame-retardant chitosan aerogel, which comprises the following steps: by taking biomass chitosan as a matrix, carrying out hydrophobic modification through tetraethoxysilane and methyltrimethoxysilane, and introducing an autonomously synthesized phytic acid-dicyandiamide flame retardant and an MXene high-heat-conductivity filler to form a mixed solution; and freezing in a refrigerator and freeze-drying in vacuum to obtain the multifunctional aerogel with a three-dimensional porous structure. The aerogel has remarkable advantages in the aspects of reducing the dosage of the flame retardant and reducing the thermal conductivity, and has the characteristics of hydrophobicity, flame retardance, thermal conductivity and reproducibility.

The invention discloses a method for reducing and detecting printing ink bubbles, and relates to the technical field of printing ink. The method comprises the steps of taking printing ink, designing a dispensing path, optimizing the dispensing amount and the dispensing speed, obtaining the dispensing amount through formula calculation, setting the dispensing speed and carrying out dispensing. Placing in a vacuum eutectic furnace, vacuumizing step by step to the ultimate vacuum degree, degassing, heating and curing to obtain a dispensing product; taking a dispensing product, adding the antioxidant solution, and recording the temperature T1 and the volume V3 of the dispensing product; and water culture is conducted, vacuumizing is conducted to reach the ultimate vacuum degree, and the temperature T2 and the volume V4 of the vacuumized dispensing product are recorded. According to an ideal gas formula, calculating the volume of bubbles in the printing ink and the dispensing product before and after vacuumizing by measuring the volume variation of the printing ink and the dispensing product in the graduated bottle and the separated graduated cup caused by bubble expansion under a vacuum condition; a spiral or Z-shaped path is adopted for dispensing, and air exhaust is facilitated through a continuous, one-way and non-closed dispensing path.

The present invention provides a cobalt-free positive electrode material and a modification method and application thereof. The surface of the cobalt-free positive electrode material is modified with an amino group, and the chemical formula of the cobalt-free positive electrode material is Li a Ni x Mn y O2, wherein 1<a<1.2, 0.2≤x≤0.95, x+y=1. The present invention modifies the surface of the cobalt-free positive electrode material with amino groups, and the amino groups can cause the positive electrode surface to have electron cloud polarization regions, that is, electron-dense regions and electron-deficient regions, providing a more convenient channel for the migration of lithium ions, and accelerating the formation of the SEI film on the surface of the initial cobalt-free positive electrode material to prevent the surface film from being oxidized. At the same time, after modification with amino groups, the stability of the electrolyte is improved, and finally the cycle stability of the battery containing the cobalt-free positive electrode material provided by the present invention is improved, and the gas production of the battery during its cycle and the thermal stability of the battery are reduced.

The utility model relates to cable technical field discloses a wear -resisting waterproof type power cable, including cable core and shielding layer, the number of cable core is three, the inside of shielding layer is located to cable core, the outer surface of cable core is fixedly connected with insulating layer, the inner chamber of shielding layer and be located between adjacent cable core and be provided with rebound rubber pipe, the utility model discloses a cable core, shielding layer and insulating layer can improve the insulation shielding performance of cable, through setting up rebound rubber pipe, can when the cable is extruded, to its buffer protection, avoid causing cable damage, through setting up waterproof layer, can improve the waterproof performance of cable, through setting up function layer, can improve the heat -proof flame -retardant performance of cable, through setting up wear -resisting layer, can improve the wear resistance of cable, through setting up above structure, can improve the wear -resisting waterproof ability and pressure -resistance of cable, to be able to satisfy the special use demand of user.

The invention discloses a method for connecting a skutterudite thermoelectric material and an electrode by using a novel Al-containing high-entropy alloy diffusion barrier layer, and relates to the design and preparation of the diffusion barrier layer and the method for connecting the skutterudite thermoelectric material and the electrode. The method aims at solving the problems that diffusion cavities are huge due to unbalanced diffusion in a connector interface obtained through an existing skutterudite thermoelectric material welding method, and consequently a connecting connector is difficult to consider heat stability, interface resistance and mechanical performance at the same time. The method comprises the following steps: 1, cleaning a skutterudite thermoelectric material and an electrode; 2, preparing a diffusion barrier layer by using an electric arc melting or high-energy ball milling or rapid solidification method, and carrying out diffusion welding or brazing; and the diffusion barrier layer is made of an Al-Co-Cr-Fe-Ni system. The joint obtained by utilizing the novel Al-containing high-entropy alloy diffusion barrier layer can simultaneously have extremely low contact resistance, extremely high thermal stability and excellent mechanical properties. The method is suitable for connecting the skutterudite thermoelectric material and the electrode.

The invention relates to the technical field of superconducting coil over-current protection devices, in particular to a superconducting coil over-current protection device and circuit based on a superconducting current-limiting cable, and the device comprises a low-temperature Dewar box body which is filled with liquid nitrogen; the superconducting current-limiting cable is positioned in the low-temperature Dewar box body; and the cable joint is connected with the tail end of the superconducting current limiting cable, and the top extends out of the low-temperature Dewar box body. The superconducting current-limiting cable comprises a framework and a superconducting strip which is spirally wound on the periphery of the framework. The round core type superconducting current-limiting cable has the characteristics of high critical current, low inductance and high thermal stability, and can quickly respond within a few milliseconds at the moment when a short-circuit fault occurs, so that the short-circuit current is limited at a relatively low level.

The application belongs to the technical field of synthetic biology, and particularly relates to a recombinant I&III fusion type collagen with high stability and low immunogenicity, and a preparation method and application thereof. The amino acid sequence of the recombinant I&III fusion type collagen and the nucleotide sequence of the coding gene thereof are disclosed. The recombinant I&III fusion type collagen with high stability and low immunogenicity is prepared by a fermentation method of an engineering bacterium. The results of examples show that the recombinant I&III fusion type collagen colI&III-1 provided by the application has good thermal stability, long-term stability and anti-degradation capacity. The animal experiment proves that the recombinant I&III fusion type collagen colI&III-1 has low immunogenicity, and does not cause immune balance disorder of animals. In addition, the recombinant I&III fusion type collagen has the characteristics of high biocompatibility and good safety, and has no influence on the overall health condition of animals.

The application provides a coating slurry, a diaphragm, a preparation method of the diaphragm and a battery. The diaphragm comprises a base material and a coating layer arranged on at least one surface of the base material, wherein the coating layer comprises non-fluorine polymer microspheres and a non-fluorine binder; the mass ratio of the non-fluorine polymer microspheres to the non-fluorine binder is (1-18):1; the melting point of the non-fluorine polymer microspheres is denoted as T, the glass transition temperature of the non-fluorine binder is denoted as Tg, and the T and the Tg satisfy the following relationship: 30≤|T+Tg|≤190. In the application, the diaphragm can be cold-pressed with positive and negative electrode sheets at low temperature, the adhesion between the diaphragm and the positive and negative electrode sheets is high, the diaphragm has excellent interface bonding performance, and the diaphragm has good air permeability, thermal stability and anti-liquid wrinkle performance.

The utility model discloses a device for quickly taking out a spectrum sample from a launder, which comprises an aluminum silicate fiber plug for containing a high-temperature solution in the launder and a support mechanism for bearing the aluminum silicate fiber plug, and the aluminum silicate fiber plug sleeves one end of the support mechanism. And an operating part for operating the supporting mechanism is arranged at the other end of the supporting mechanism. The device for rapidly taking out the spectrum sample from the launder has the advantages of being low in cost and easy to operate, and can meet the high requirements of a production line for timely sampling, rapid inspection and timely adjustment of components of a melt in an electric furnace.

The invention discloses a biodegradable blocked isocyanate chain extender and a preparation method and application thereof. The chain extender is made of multifunctional isocyanate, a capping agent, a polyol and a catalyst, and can be used in the processing of fully biodegradable materials. The chain extender of the invention is biodegradable, has a fast chain extension reaction speed, and has good environmental compatibility. It contains two carbamate groups with different stabilities, and can form a dynamic micro-crosslinked three-dimensional network in which a chemical crosslinked network and a physical crosslinked network coexist in biodegradable plastics, thereby simultaneously improving the strength and toughness of the material. In addition, the unblocked small molecule capping agent has a synergistic effect with the biodegradable material matrix, has an excellent nitrification inhibition effect in the soil, and can effectively reduce nitrogen loss and improve the utilization rate of nitrogen fertilizer.