18results about How to "Good thermal stability" patented technology

The invention relates to the technical field of rubber material preparation, and discloses an environment-friendly sponge and application thereof.The environment-friendly sponge is prepared from, by weight, 110-150 parts of polyether polyol, 60-80 parts of diphenylmethane diisocyanate, 2-8 parts of a cross-linking agent, 5-10 parts of an opening agent, 3-5 parts of a foaming agent, 0.1-0.5 part of a foam stabilizer, 1.5-2.5 parts of an amine catalyst, 5-10 parts of antibacterial microcapsules and 10-15 parts of modified hybrid nanoparticles; the antibacterial microcapsule is a polyurea microcapsule which is prepared by adopting an interfacial polymerization method and contains benzyl benzoate and 1, 2-benzisothiazole-3-ketone, the modified hybrid nanoparticle is a nano titanium dioxide-nano zinc oxide hybrid particle grafted triazine derivative, and the triazine derivative molecule contains a hindered phenol structure and a siloxane structure. The antibacterial microcapsules are added into the polyurethane foam sponge, the mite killing effect and antibacterial property of the environment-friendly sponge are effectively improved, and meanwhile, the modified hybrid nanoparticles are added, so that the aging resistance of the environment-friendly sponge is improved.

The invention discloses a camouflage material, a hyperspectral camouflage coating and a preparation method and application thereof, and belongs to the technical field of camouflage materials, and the molecular formula of the camouflage material is Co2Cr3TiLiNiO10. The camouflage material has the performance of simulating spectral characteristics of natural yellow and green plants and has a good bionic function, crystals of the camouflage material are of a spinel structure, and the camouflage material has the characteristics that the lightness value L is relatively low, the hue is relatively dark, a green camouflage coating is easier to prepare, the camouflage material has the characteristics of good aging resistance, good thermal stability and the like, and the camouflage material can be used as a green camouflage coating. The reflectivity of the infrared plateau area is higher, the camouflage performance is easier to realize, and the spectral characteristics of green vegetation can be better simulated.

The invention relates to the technical field of ammonium nitrate fuel oil explosives in industrial explosives, in particular to a safe and environment-friendly porous granular ammonium nitrate fuel oil explosive and a preparation method thereof. The safe and environment-friendly porous granular ammonium nitrate fuel oil explosive comprises the following components in percentage by mass: 3-9% of porous granular ammonium nitrate and 91-97% of biomass oil, the biomass oil is cashew nut shell oil or a cashew nut shell oil derivative; the preparation method comprises the following steps: S1, weighing; s2, loading materials; and S3, mixing. The porous granular ammonium nitrate fuel oil explosive is prepared by compounding the renewable and high-flash-point biomass oil containing a plurality of polar groups in the molecular structure with the porous granular ammonium nitrate, renewable resources are fully utilized, resource waste is avoided, pollution of petrochemical resources to the environment is reduced, and the explosive production cost can also be reduced. And the explosive prepared by the invention has excellent thermal stability and explosion performance, and has a good application prospect.

The invention relates to the technical field of synthetic fiber paper manufacturing, in particular to aramid-based heating paper and a preparation method thereof.The preparation method comprises the steps that para-aramid chopped fibers and potassium hydroxide are added into dimethyl sulfoxide, then water is added, stirring and dispersing are conducted, and nanofiber dispersion liquid is obtained; adding carbon fibers and aramid chopped fibers into the nanofiber dispersion liquid for defibering, and uniformly mixing to obtain chopped fiber dispersion liquid; the preparation method comprises the following steps: adding a meta-aramid polymer liquid, a nanofiber dispersion liquid and a precipitation agent into precipitation equipment, carrying out high-speed shearing to obtain a fibrid, carrying out cooling molding in a water washing pool, and carrying out multi-stage water washing to obtain a meta-aramid fibrid; and uniformly mixing the chopped fiber dispersion liquid and meta-aramid fibrid, and then carrying out wet-process papermaking, squeezing drying and hot-pressing treatment to obtain the aramid-based heating paper. According to the preparation method, the carbon fibers and the aramid chopped fibers can be well dispersed, and the prepared aramid-based heating paper has higher uniformity and better mechanical properties and heating performance.

The application discloses a kind of coherent non-local terahertz wave front regulation and control metasurface device use method, it is related to terahertz device technical field.The specific steps of the method are as follows: S1, circularly polarized terahertz waves of opposite rotation are incident from the two sides of coherent non-local terahertz beam deflection metasurface device along normal line;S2, the relative distance of two terahertz waves to metasurface is adjusted, so that the optical path difference is the odd multiple of half wavelength;S3, the transmitted wave generated by the plane wave emitted by one wave source through metasurface is coherent with the reflected wave generated by the plane wave emitted by another wave source through metasurface, and the coherent constructive diffraction wave can be observed at the target diffraction angle.The application integrates efficient circularly polarized wave chirality conversion, sensitive spectral selection, wave front regulation and control and active coherent tuning function of output energy into one, and is simple in design and easy to process, and can be widely applied in the field of terahertz imaging.

This invention belongs to the field of cable technology, and specifically discloses a curve-heat-rise fire-resistant power cable. The curve-heat-rise fire-resistant power cable includes a sheath layer comprising an outer sheath and an inner sheath arranged sequentially. The inner sheath comprises the following raw materials: methyl vinyl silicone rubber, a refractory composition, silica, tetramethyldivinyldisiloxane, epoxidized soybean oil acrylate, a heat stabilizer, an accelerator, and a diphenylsulfonate. The refractory composition comprises modified ceramic material, sulfonate flame retardant, and polyarylene ether nitrile in a mass ratio of (45~52):(25~38):(17~23). This application uses ceramicized silicone rubber material as the inner sheath and a specific mass ratio of modified ceramic material, sulfonate flame retardant, and polyarylene ether nitrile as the refractory composition, significantly improving the high-temperature resistance, excellent thermal stability, and excellent fire resistance of the power cable, effectively increasing the fire resistance time of the power cable under the temperature rise curve.

The invention provides a method for preparing cycloalkanes through microwave pyrolysis of lignite and a hydrogen-donating solvent, belongs to the technical field of microwave pyrolysis of lignite, and mainly aims to prepare C6-C10 cycloalkanes. The method comprises the following steps: firstly, microwave absorbent activated carbon is subjected to microwave irradiation treatment and then is added into a microwave pyrolysis system; then adding the upgraded lignite and a hydrogen-donor solvent into a microwave pyrolysis system according to a certain proportion, and ensuring that the microwave pyrolysis system is in a nitrogen atmosphere; then carrying out pyrolytic reaction in a microwave pyrolytic system with the microwave electric field intensity of 2.68 * 10 < 4 >-3.28 * 10 < 4 > V / m under the normal pressure condition, condensing the generated airflow, and absorbing by dichloromethane; according to the method, the synergistic effect of the lignite, the microwaves, the hydrogen-donor solvent and the microwave absorbent is utilized, the cycloalkane is generated through pyrolysis under the moderate conditions of medium and low temperature and normal pressure, and the excellent results that the lignite conversion rate can reach 70% or above and the cycloalkane yield can reach 2.5% or above can be achieved.

The invention belongs to the technical field of polyester heat stabilizers, and discloses an aluminum metal-organic framework material for improving the heat stability of aliphatic degradable polyesters and a preparation method and application thereof.The preparation method comprises the steps that aluminum salt, 4, 4-diphenyldicarboxylic acid, a template benzoic acid and a 1-methyl-2-pyrrolidone solvent are mixed and subjected to a reaction under the microwave condition, and then a reaction product is obtained; the repeated structural unit of the aluminum metal-organic framework material is [Al2 (BPC) 3]. NMP, BPDC is 4, 4-biphenyl diformate anions, and NMP is 1-methyl-2-pyrrolidone; the method is simple to operate, advanced in process, short in reaction time and high in yield. The aluminum metal-organic framework material can remarkably improve the thermal stability of the aliphatic degradable polyester, the initial pyrolysis temperature T5% of the aliphatic degradable polyester can be increased by 25-35 DEG C, the maximum decomposition temperature Tmax can be increased by 25-40 DEG C, and the aluminum metal-organic framework material has a good application prospect in the field of degradable polyester processing.

The invention provides a layered silicate material, a silicate molecular sieve and a preparation method and application thereof, and belongs to the technical field of molecular sieves. According to the layered silicate material provided by the invention, the ratio of Si to heteroatoms is highly adjustable, the layered silicate material has good thermal stability and hydrothermal stability, a 12-membered ring opening is formed in a silicate layer, and the layered silicate material can be used as a precursor for preparing a molecular sieve to generate a three-dimensional silicate molecular sieve through topological condensation; the monolayer silicate nanosheet can also be obtained through layer stripping treatment and is used for preparing an oriented film, an adsorbent, a catalyst, an ion exchanger, a nanofiltration material or a seawater desalination film and the like. The framework of the silicate molecular sieve provided by the invention has eight topology independent atoms, the crystal structure of the silicate molecular sieve has a 12 * 12 * 12-membered ring three-dimensional cross duct system, and the silicate molecular sieve can be used as a catalyst, an ion exchanger or an adsorbent.

The invention provides a quantum dot color conversion film resistant to high blue light radiation and high temperature and a preparation method of the quantum dot color conversion film, and belongs to the technical field of color conversion films. The preparation method comprises the following steps: preparing Zn-In / La-S quantum dots, growing ZnS shells on the surfaces of the quantum dots, coating a layer of polydopamine layer to prepare modified ZnS shell-coated Zn-In / La-S quantum dots, mixing the modified ZnS shell-coated Zn-In / La-S quantum dots with graphene oxide-coated ZnCNi3 in a solvent, uniformly spin-coating a polycarbonate film, treating the other surface by the same method, and drying to prepare the quantum dot color conversion film resistant to high blue light radiation and high temperature. The quantum dot color conversion film prepared by the invention has better high blue light radiation resistance and high temperature resistance, is high in ultraviolet and blue light blocking efficiency, low in cost and good in heat resistance and chemical stability, can tolerate water and oxygen environments, and has a wide application prospect.

The application relates to the field of high polymer material preparation, and discloses a methyl methacrylate polymer and a preparation method and application thereof. The method comprises the following steps: (1) performing a prepolymerization reaction on methyl methacrylate, optionally a functional monomer X, a chain transfer agent and an initiator I in a reaction kettle I in the presence of a protective gas to obtain a prepolymer; (2) performing a final polymerization reaction on the prepolymer in a reaction kettle II in the presence of the protective gas to obtain the methyl methacrylate polymer; wherein, the step (1) and / or the step (2) are performed in the presence of an initiator II; wherein, the initiator II is a compound shown in formula I, and the methyl methacrylate polymer has the characteristics of narrow molecular weight distribution.

The utility model discloses a kind of glue-doped pieces of ultralow glue overflow amount, covering film, tape glue copper foil substrate and cover plate, including ultralow glue overflow amount glue adhesive layer, polyimide film or coating type polyimide layer, the thickness of the ultralow glue overflow amount glue adhesive layer is 0.5-5 μm.The utility model has excellent flatness, operability, insulating property and thermal stability, and because ultralow glue overflow amount glue adhesive layer is very thin, glue overflow amount is very low, can be used for the compounding of material, thickness reduction, forming, and can be adapted to the process conditions of circuit board technology.

This invention relates to the field of organic electroluminescent display technology, specifically to an electron transport layer material with phenanthreneimidazole as the core framework, an organic electroluminescent diode, and a fabrication method. The ETM, obtained by introducing simple substituents at the N1 and C2 positions, is simple to synthesize and has a high yield. This type of ETM successfully balances the contradiction between conjugation degree and triplet energy level (ET), achieving wide bandgap, high ET, and high electron mobility. OLED devices fabricated with this type of ETM can achieve low turn-on voltage and high device efficiency. For example, CH3OPICN achieves a turn-on voltage of 4 × 10⁻⁶. 5 V cm ‑1 Under an electric field strength of [insert value here], the electron mobility can reach 4.4 × 10 [insert value here]. ‑5 cm 2 V ‑1 s ‑1 Blue OLED devices fabricated using this as an electron transport layer exhibit a turn-on voltage of 3.0V and a density of 83180 cd·m². ‑2 Its brightness reaches 15.7 cd·A. ‑1 The current efficiency is 11.8 lm·W. ‑1 With a power efficiency of 7.7% and an external quantum efficiency, it is an excellent ETM that can be commercialized.

This invention discloses an environmentally friendly fluorinating agent for liquid cooling systems and its preparation method. The main component is perfluoropolyether-modified hydrofluoroether, prepared from raw materials comprising the following mass fractions: 70%–85% hydrofluoroether, 8%–15% perfluoropolyether, 3%–8% heat stabilizer, 2%–6% corrosion inhibitor, 0.2%–0.8% defoamer, and 0%–3% cosolvent. This invention achieves environmental friendliness (lower GWP) and low toxicity (LD50) through a multi-component synergistic design of "low GWP hydrofluoroether + PFPE modification + preferred compound stabilizer and corrosion inhibitor". 50 It is significantly superior to existing products in terms of higher temperature, thermal stability (higher decomposition temperature) and material compatibility (lower corrosion rate and swelling rate), and fully meets the requirements of high-end liquid cooling systems.

The invention discloses a protective coating for a glass inner wall of a container and a preparation method of the protective coating, and belongs to the technical field of coatings. The protective coating is of a composite film structure and comprises an inner layer composed of oxides of silicon, aluminum, zirconium and titanium and an outer layer composed of pure silicon oxide. And the inner layer comprises the following elements in percentage by mass: 80 to 100 percent of silicon element, 0 to 10 percent of aluminum element, 0 to 10 percent of zirconium element and 0 to 3 percent of titanium element based on the total mass of the silicon element, the aluminum element, the zirconium element and the titanium element being 100 percent. By adopting a specific double-layer composite structure, the gradient compact barrier with complementary functions is formed. The structure not only can synergistically block precipitation of various ions, but also has the advantages of firm combination and good thermal stability, so that the chemical stability and the service life of the glass container are remarkably improved.

The invention provides a triazine aromatic group-containing fused ring electron transport material. The structural formula of the triazine aromatic group-containing fused ring electron transport material is # imgabs0 #, wherein Ar1 and Ar2 are deuterium-containing or deuterium-free aromatic groups with the carbon number on the ring being 6-18. Phenanthrene and carbazole are introduced to a substituent group of triazine, so that a conjugated system of the material is enhanced, the electron transport performance and the thermal stability of the compound are improved, and the compound has a wide application prospect.

The invention belongs to the field of preparation of plant-derived functional materials, and particularly relates to puerarin-pueraria starch-Span80 gel beads as well as a preparation method and application of the puerarin-pueraria starch-Span80 gel beads. The method is realized by the following steps: firstly, weighing pueraria starch, and dispersing the pueraria starch in ultrapure water containing sodium alginate to obtain a gelatinized pueraria starch solution; adding a surfactant into the gelatinized pueraria starch solution, stirring, dropwise adding the puerarin-ethanol solution, and continuously stirring after dropwise adding; and sucking the supernate, dripping into a calcium lactate solution, curing into balls, and performing vacuum freeze drying to obtain the product. The puerarin-embedded gel bead prepared by the invention has pores on the surface, and the structure is of a porous three-dimensional network structure, so that the adsorption and embedding of subsequent active substances are facilitated; a texture result shows that in addition to elasticity, the hardness, cohesiveness, gelatinization, chewiness and resilience of the gel beads before freeze-drying are as follows: puerarin-pueraria starch-Span80 gel beads > puerarin-pueraria starch gel beads > pueraria starch gel beads; and the swelling property is good and can reach 6.94 + / -6.34%.

This invention belongs to the field of phosphate binders, specifically relating to a linear saturated aliphatic dicarboxylic acid-iron(III) complex, its preparation method, and its applications, particularly its use in preparing drugs for the treatment or prevention of hyperphosphatemia. In the dicarboxylic acid-iron(III) complex, the molar ratio of iron to dicarboxylic acid is 1:0.8~1.2, and the dicarboxylic acid is a linear saturated aliphatic dicarboxylic acid. The complex is prepared by reacting a ferric salt and a dicarboxylic acid salt in a solvent. In vitro phosphate binding experiments demonstrate that the dicarboxylic acid-iron(III) complex of this invention exhibits high phosphate binding capacity per unit mass of iron within the pH range of 3-7, and maintains a high phosphate binding capacity per unit mass of iron in vivo, significantly superior to commercially available sucrose ferric hydroxide chewable tablets. As an oral phosphate binder, the complex of this invention exhibits stronger phosphate binding capacity per unit mass of iron in vivo, higher iron utilization, lower total iron intake, and fewer adverse reactions.