575results about How to "Good thermal properties" patented technology

The invention discloses a preparation method of a biomass-base polyurethane foam material, belonging to the technical field of chemical industry. The method mainly comprises the following steps: mixing polybasic alcohol liquefier and liquefying catalyst, putting the mixture in a container, heating to 150-200 DEG C, adding biomass waste and industrial lignin, liquefying, and cooling to room temperature to obtain a biomass liquefied product; and mixing the prepared biomass liquefied product, foaming catalyst, foam stabilizer, foaming agent and lignosulphonate into a component A, using isocyanate as a component B, mixing the component A and component B in a mixing vessel, stirring at 20-40 DEG C at 8000-14000 rpm for 5-30 seconds, pouring the mixture into a die, naturally foaming for 5-60 seconds, standing at 80-120 DEG C for 8-24 hours, and storing at room temperature for 8-24 hours until the mixture is sufficiently aged and formed. The invention can obviously improve the properties of the biomass-base polyurethane foam.

The invention provides an offshore wind power duct rack grouting material which comprises a dry material and water, wherein the dry material comprises the following components in percentage by mass: 25.0-40.0 percent of Portland cement, 1.0-5.0 percent of sulphoaluminate cement, 45.0-55.0 percent of quartz sand and 5.0-15.0 percent of admixture; the addition amount of the water is proper. The invention further provides a construction method of the offshore wind power duct rack grouting material. According to the offshore wind power duct rack grouting material and the construction method thereof, the material has the characteristics of high liquidity, high pumpability, super-high early-strength, ultrahigh strength, high durability, good water dispersion resistance, zero shrinkage and high fatigue resistance, can be conveyed by a rubber pipeline by adopting a pumping and grouting construction mode, is suitable for underwater grouting and is also suitable for grouting connection between the offshore wind power duct rack and steel pipe pile foundation.

The invention relates to the field of graphene, particularly a high-quality graphene dispersion method and a method for preparing a film from a corresponding graphene dispersion solution or slurry. Graphene powder or aggregation-state slurry is added into a micromolecule amine compound solution to carry out dispersion treatment, so that the three amine micromolecule compounds are utilized to implement dispersion of the graphene; and in the dispersion solution, the molecules of the compounds are combined with the graphene under the pai-pai interaction, the amino group protonation is utilized to electrically charge the graphene, and the electrostatic repulsion action is utilized to prevent aggregation, thereby implementing the stable dispersion of the graphene. The dispersion solution or slurry can be subjected to spray coating, roller coating, scratch coating or any other conventional coating preparation method to obtain a graphene film on the substrate surface. The method can implement high-concentration efficient dispersion on high-quality graphene with the carbon/oxygen atom ratio of greater than 20 in multiple solvents; and after the film is formed and dried, no solvent or dispersant residue exists.

A high flow miscible thermoplastic resin composition is disclosed which comprises structural units derived from substituted or unsubstituted polycarbonate and substituted or unsubstituted aliphatic polyester. Also disclosed is a high flow and miscible thermoplastic resin composition that comprises of structural units derived from substituted or unsubstituted polycarbonate and substituted or unsubstituted low molecular weight aliphatic polyester. In addition the composition disclosed possess good optical and thermal properties and good flow.

The invention provides a graphene/polylactic acid composite material, comprising the polylactic acid and graphene oxide, wherein the graphene oxide, by mass, accounts for 0.1% to 5% of the polylactic acid. The invention also provides a preparation method of the graphene/polylactic acid composite material,comprising the steps of: a) dispersing the graphene oxide in water for acquiring graphene oxide dispersion liquid; b) adding polylactic acid solution to the graphene oxide dispersion liquid under stirring condition, letting the uniformly stirred mixed solution stand for layering and filteringfor obtaining master batch; and c) blending the master batch with the polylactic acid for obtaining the graphene/polylactic acid composite material. Experiments show that the graphene/polylactic acidcomposite material provided in the invention has a tensile strength up to 79 MPa, a tensile elastic modulus up to 3100 MPa, a notch impact strength up to 12 KJ/m<2> and a heat deflection temperature up to 95 DEG C.

Disclosed herein is a photoresist composition which includes a norbomene copolymer having an epoxy group, an acid generator, and an organic solvent. The norbomene polymer shows superior mechanical and thermal properties, high transparency, excellent insulating properties, and particularly, improved mechanical properties due to the presence of an epoxy group. The photosensitive resin composition shows superior performance, e.g., transparence, developing properties, residual film characteristics, chemical resistance, heat resistance, and flatness. Particularly, since the photosensitive resin composition enables easy formation of a pattern as an interlayer insulating film and shows a high light transmittance even when being formed into a thin film with a relatively large thickness, it is suitable for the production of an interlayer insulating film used in the fabrication processes of LCDs.

The invention provides a method for preparing silicon nitride ceramics through 3D printing. With the adoption of a 3D printing technology, silicon nitride ceramic parts of complicated shapes can be prepared, and a double-layer scraper molding technology in the printing process is utilized, so that beta phase silicon nitride is in oriented arrangement, and after degumming and sintering, the structured silicon nitride ceramics with complicated shapes can be obtained. The prepared silicon nitride parts have excellent reliability, mechanical properties, thermal properties, wear resistance and thelike. The invention provides a novel preparation method, and the molding problem of the silicon nitride ceramics is solved. Moreover, the material performance is improved, and the cost is reduced. According to the preparation method provided by the invention, application of the silicon nitride ceramics in the fields of medical treatment, chemical industry, electronics, aerospace and the like can be promoted.

The invention relates to a phosphor in a polycrystalline ceramic structure and a light-emitting element provided with the same comprising a Light-Emitting Diode (LED) in which a composite structure of phosphor particles is embedded in a matrix, characterized in that the matrix is a ceramic composite structure comprising a polycrystalline ceramic alumina material, hereafter called luminescent ceramic matrix composite. This luminescent ceramic matrix composite can be made by the steps of converting a powder mixture of ceramic phosphor particles and alumina particles into a slurry, shaping the slurry into a compact, and applying a thermal treatment, optionally in combination with hot isostatic pressing into a polycrystalline phosphor-containing ceramic alumina composite structure. The luminescent ceramic matrix composite further allows a method of tuning the light-diffusing properties by changing at least one of the fractions of phosphor particles and second ceramic particles, the grain size of the particles of the ceramic composite structure, the difference in the refractive index of the particles of the ceramic composite structure, and the porosity in the polycrystalline phosphor-containing ceramic composite structure.

The invention provides an ultra high-temperature resistant nickel-chrome alloy and a manufacturing method thereof, wherein the ultra high-temperature resistant nickel-chrome alloy has a higher meltingpoint, can resist the high temperature higher than 1300 DEG C for a long time and has better tensile strength and yield strength simultaneously. The ultra high-temperature resistant nickel-chrome alloy basically comprises the following components in percentage by weight: 21-25 of Cr, 58-63 of Ni, Al which is not less than 1 and not more than 1.7, Cu which is not less than 0.5 and not more than 1.0, C which is not less than 1 and more than 0.1, Si which is not less than 0.5 and more than 0, Mn which is larger than 0 and not more than 1.0, S which is larger than 0 and less 0.015, and the balance of Fe. The manufacturing method comprises the following steps: mixing the materials according to the alloy components and then smelting; carrying out secondary refining; first heating the mixture to900-1200 DEG C, keeping the temperature for 10-40 minutes, and then forging; cold processing; and water cooling. The invention improves the high-temperature resistant performance, the tensile strength and the yield strength of the alloy, and has better comprehensive benefit. The manufacturing method solves the problems of alloy smelting and heat processing, and improves the product purity.

Disclosed herein is a polyamide-imide copolymer film, comprising a copolymer resin in which a unit structure derived from TFDB (2,2′-bistrifluoromethyl-4,4′-biphenyl diamine), a unit structure derived from 6FDA (4,4′-(hexa-fluoroisopropylidene)diphthalic anhydride), a unit structure derived from BPDA (3,3′,4,4′-biphenyltetracarboxylic dianhydride) and a unit structure derived from TPC (terephthaloyl chloride or 1,4-benzenedicarbonyl chloride) are copolymerized, wherein the copolymer resin has a weight average molecular weight of 10,000˜400,000.

The invention discloses an epoxy resin based on gallic acids with a structure shown as the formula I, which has high epoxy values and also has higher crosslinking density after being cured, thus having good mechanical property and thermal property. The invention also discloses a preparation method of the epoxy resin based on the gallic acids, comprising the following steps: mixing the gallic acids, epoxy halogenopropane and a catalyst and reacting for 2-5 hours at the temperature of 100-120 DEG C; cooling to 20-40 DEG C; adding alkaline compounds and water and continuing to react for 2-5 hours; and washing, removing a solvent and drying to obtain the epoxy resin based on the gallic acids. The preparation method is simple in process, good in controllability and easy to implement industrially. The invention also provides an application of the epoxy resin based on the gallic acids. The epoxy resin based on the gallic acids is particularly applied to preparing composite materials, epoxy adhesives and coatings.

A material for an insulating film which comprises a copolymer obtained by reacting a polyamide having a specific structure and a reactive oligomer as a component forming the film; a coating varnish for an insulating film which comprises this material and an organic solvent; an insulating film which comprises a layer of a resin comprising as a main structure a polybenzoxazole which is obtained by treating the above material or the above coating varnish by heating so that condensation reaction and crosslinking reaction take place and has fine pores; and a semiconductor device which comprises an insulating interlayer film for multi-layer wiring comprising the insulating film and/or a surface protective film comprising the insulating film. Excellent electrical, thermal and mechanical properties are exhibited and a low permittivity can be achieved.

A photosensitive resin composition is provided. The composition includes an acrylic copolymer, a photoacid generator and a solvent. The acrylic copolymer includes structural units of Formulae 1, 2, 3 and 4, which are described in the specification. The composition exhibits excellent performance characteristics in terms of mechanical and thermal properties, transmittance, insulating properties, transparency, developability, residual film ratio, heat resistance, flatness and the like. Particularly, the use of the composition facilitates the formation of a pattern as an interlayer insulating film. The composition can also be used to produce a thick film with high transmittance. Therefore, the composition is effectively used as a material for an interlayer insulating layer in LCD fabrication processes. An organic insulating film produced using the composition is also provided.

The present invention discloses an epoxy resin based on 2,5-furandicarboxylic acid, which is a compound has a structure represented by a formula I, is prepared by directly adopting biological origin2,5-furandicarboxylic acid as a raw material, is a biological-base, green and environmentally friendly product, and has dual effects of petroleum resource saving and environment protection. The present invention further discloses a preparation method for the epoxy resin based on 2,5-furandicarboxylic acid, wherein the preparation method has characteristics of simple preparation, good controllability and easy performing. The present invention further discloses an application of the epoxy resin based on 2,5-furandicarboxylic acid, wherein the epoxy resin based on 2,5-furandicarboxylic acid can be applicable for composite materials, epoxy adhesives, coatings and other fields, wherein the epoxy resin based on 2,5-furandicarboxylic acid can be adopted to prepare cured products containing the epoxy resin based on 2,5-furandicarboxylic acid, and can be adopted as a composite material to provide excellent mechanical property and excellent thermal property. Formula I.

The invention discloses fusion-method-prepared functional graphene cellulose fiber. The fiber mainly comprises 0.5-10.0% of graphene and 90.0-99.5% of cellulose. A preparation method of the graphene cellulose fiber comprises procedures of graphene dispersion liquid preparation, cellulose/ionic liquid mixture preparation, mixing, pre-fusing, spinning solution preparation and spinning. The far infrared normal emissivity of the prepared functional graphene cellulose fiber reaches 0.83-0.98, the ultraviolet protection coefficient reaches 62.78-560.21, the ultraviolet a transmittance is smaller than 4.92%, and compared with common viscose, the graphene cellulose fiber has the advantage that the thermal decomposition temperature is raised by 10-42 DEG C. By means of the method, the production process is short, less pollution is caused to the environment, the requirement of sustainable development is met, and the method has great significance for achieving a high-temperature melt spinning route of the functional cellulose.

The invention relates to TPV (Thermoplastic Vulcanizate) material for automobile interior trim. The TPV material comprises the following material in part by weight: 80 to 120 parts of TPV, 0 to 15 parts of cross-linking agent, 0 to 10 parts of nucleating agent, 0 to 5 parts of antioxidant, 0 to 5 parts of light stabilizer and 0 to 5 parts of coloring agent. The invention also discloses a preparation method of the TPV material. The TPV material conducted to radiation crosslinking has the advantages that the high temperature resistance and the ageing resistance are improved, and melt viscosity is increased and molecular chains are difficult to move and are not easy to deform because of crosslinking and involvement of the molecular chains during secondary machine shaping at high temperature, so that the conservation degree of patterns of the TPV material is good.

The invention discloses a method for preparing a negative permittivity material with graphene, carbon nanometer tubes and phenolic resin.The method includes the steps that graphene powder, carbon nanometer tube powder and phenolic resin powder are subjected to ball mill mixing, then a PVA solution is added, and the mixture is ground to be even; the powder is poured into a mold to be pressed into a sheet.A certain quantity of functional groups exist on the surface of the graphene in the composite material prepared with the method, and are not connected with each other and free of electric conduction, repulsive force exists between the functional groups, the functional groups are attached between sheet layers of the graphene and distributed on the surface of the graphene to form an interface layer used for limiting leakage conductive currents, and therefore dielectric losses are decreased.