577results about How to "Good thermal properties" patented technology

The invention provides a conductive graphene printing ink. The conductive graphene printing ink is composed of 0.001-80wt% of graphene, 1-60wt% of a linking material, 0.1-30wt% of an assistant, and the balance solvent. The invention also provides a preparation method of the conductive graphene printing ink. The conductive graphene printing ink has the advantages of good toughness, good die molding performance, good adhesion and good impact resistance; chemically doped graphene and chemically modified graphene in the graphene have good conductive, mechanical and thermal performances. The molecules of the chemically doped graphene comprise one or more of polyaniline, polyacetylene, polythiophene, polyparaphenylene and polypyrrole, and the functional groups of the chemically modified graphene comprise one or more of an anilino group, a pyrryl group, an imidazolyl group, a benzenesulfonic acid group, a thienyl group, a furyl group, a phenyl group, a hydroxy group, an ester group and derivative groups thereof, so the conductive performance, the mechanical performances and the dispersion stability of graphene in the printing ink are improved.

The invention discloses thermal interface materials and a manufacturing method of the thermal interface materials. The interface materials are formed by means of heating and oxidization of metals such as gallium, indium, mercury, sodium, potassium, cesium or binary alloy and multicomponent alloy of the cesium. The manufacturing method comprises the following steps: selecting metals such as the gallium, the indium, the mercury, the sodium, the potassium, the cesium or the binary alloy and the multicomponent alloy of the cesium, and enabling the metals or the alloy to become liquid and enabling the liquid metals or the alloy to be placed in air or oxygen through heating. By means of placing the metals such as the gallium, the indium, the mercury, the sodium, the potassium, the cesium or the binary alloy and the multicomponent alloy of the cesium in the air and the oxygen to be oxidized to form the thermal interface materials, wettability between metal-based fluid and each interface can be greatly enhanced, thereby requirements of the thermal interface materials can be met. Due to the good thermal and wetting properties, the thermal interface materials can play significant roles in an aspect of electric chip thermal conductivity of the fields such as cryogenic engineering, boosters of computers, satellites and rockets and laser device.

The invention belongs to the technical field of water-based polyurethane paints, and discloses a water-based polyurethane paint containing a polyether glycol / nano TiO2 hybrid material, and a preparation method and application thereof. The paint comprises the following components in parts by mass: 25-75 parts of polyether glycol / nano titanium dioxide hybrid material, 15-65 parts of diisocyanate, 100 parts of polyether glycol, 8-16 parts of polyhydroxy-carboxylic acid, 0.05-0.5 part of organo-metallic catalyst, 0.5-10 parts of crosslinking agent, 6.2-12.4 parts of neutralizer, 1-8 parts of chain extender and 0.2-2.0 parts of defoaming agent. The paint enhances the compatibility between the nano titanium dioxide and polyurethane base, has the advantages of favorable thermal properties, favorable mechanical properties, favorable wear resistance and excellent ultraviolet resistance, and can be widely used in the fields of architectural paints, automobile paints, wood paints, electrodeposition paints, paper conditioning paints, glass fiber paints, electrophoretic paints and the like.

The invention discloses a method for preparing an anti-aging high-transparent polyurethane and graphene oxide composite microporous membrane material. The method includes: preparing graphene oxide as filler, and uniformly mixing the graphene oxide into polyurethane emulsion by the aid of high dispersion wettability of flatting agent. Using the method can improve dispersibility and stability of the graphene oxide in the polyurethane emulsion, enhance the bonding force between the graphene oxide and an interface of a polyurethane matrix, and obtain the anti-aging high-transparent polyurethane and graphene oxide composite microporous membrane material. The method is simple and environment-friendly, the anti-aging performance and transparency of the composite microporous membrane material areevidently improved, and integral strength of the material is basically unaffected.

A polymeric composition containing at least one polymer and carbon nanotubes is described. The polymeric composition can have carbon nanotubes that are multi-wall carbon nanotubes and / or single-wall carbon nanotubes. The compositions can also contain carbon black. Also described are various articles made from the polymeric compositions including cables and other articles.

The invention discloses a production system and method for a polarization-orbital angular momentum mixed entangled state single photon. The system comprises an LD pumping source, an optical coupling system, a laser resonant cavity, a light beam regulating unit, a Q-plate converter and a purification unit, all of which are connected in sequence. The LD pumping source is used for producing pumping light and providing an input signal for the system. The optical coupling system is used for carrying out collimation and focusing on the pumping light. The laser resonant cavity is used for providing feedback energy, and the direction and frequency of the pumping light are selected. The light beam regulating unit is used for regulating the pumping light and outputting a horizontal polarization single photon. The Q-plate converter is used for converting the horizontal polarization single photon into the polarization-orbital angular momentum mixed entangled state single photon. The purification unit is used for carrying out purification on the polarization-orbital angular momentum mixed entangled state single photon. The high-purity polarization-orbital angular momentum mixed entangled state single photon can be stably produced, and the system structure and the production process are simple.

The present invention relates to a polyimide and a coating composition formed thereby, wherein the polyimide is represented by a formula (1), two ends of the polyimide respectively have two -COOH capping groups. The coating composition of the present invention comprises the polyimide and a hardener having two to six functional groups which can be reacted with the -COOH. A polyimide coating and a polyimide film formed by the coating composition of the present invention have excellent solution resistance and coefficient of thermal expansion (CTE), and can be applied to active (passive) assembly, optical materials, touch panels, copper clad laminates, flexible electronic materials, or protection materials of integrated circuit modules, or thin film base materials of glass thin film touch panels.

The invention relates to a compound-type fabric containing liquid metal. The fabric can be completely woven by blended fiber yarn of a liquid-metal-containing fiber, and can also be woven by mixing a natural fiber yarn and blended fiber yarn of the liquid-metal-containing fiber, wherein the liquid-metal-containing fiber is a textile fiber the surface of which is adhered with liquid metal nanoparticles, a tubular textile fiber the pipe of which is filled with liquid metal, or a reticular casing-pipe-type textile fiber which is woven by nanowires and the reticular casing pipe of which is filledwith liquid metal; and the liquid metal is gallium metal, gallium-based alloy, Na-K alloy or wood metal containing indium. The compound-type fabric can be made into a single layer, two layers or three layers according to requirements, can be used as a basic fabric for manufacturing articles such as clothes, trousers, shoes and hats, gloves, stockings, bedclothes and pillowcases and the like, can endow clothing and household articles with temperature adjusting, radiation proofing, electrostatic resisting and sterilizing and antimicrobial functions, has stable performance and high reliability, needs not to be added with other organic components, and can be used for making up the defect of the property singleness of the traditional fabric.

The invention discloses a method for carrying out graft modification on graphene by virtue of a styrene-maleic anhydride copolymer. The method comprises the following steps: taking graphite powder as a raw material, preparing graphene oxide (GO) by utilizing an improved Hummers' process, then grafting maleic anhydride to the GO by adopting a monomer grafting way, then taking a free radical initiator, styrene and maleic anhydride as functional modification reagents, carrying out in situ polymerization, solvent washing and centrifugal separation, and drying, so that styrene-maleic anhydride copolymer grafted graphene oxide is obtained. Grafting ratio of the obtained SMAFG is 20-50%. The styrene-maleic anhydride copolymer grafted graphene oxide can be well dispersed and form stable chemical bonding in a process of preparing a styrene-maleic anhydride copolymer grafted graphene oxide / polymer matrix composite material with the polymer matrix and has the effect of better improving mechanical and thermal properties of a polymer.

The invention relates to a preparation method of double-rare-earth-ion tantalite high-temperature ceramic and belongs to the technical field of high-temperature ceramic preparation. The molecular formula of the double-rare-earth-ion tantalite high-temperature ceramic is shown in the description (REa / REb = Y, La, Nd, Sm, Eu, Gd, Dy, Er and Yb, and REa and REb are not the same type of rare earth elements). The used raw materials are rare earth oxide and tantalum oxide andare weighed in proportion, the weighed raw materials and absolute ethyl alcohol are put in a ball milling tank for mixing and sealing, then the mixture is put on a planetary ball mill for ball milling, the mixture can be evenly mixed, and primary sintering is performed after the mixed powder is dried and screened; the cooled and taken-out sample is grinded, ball-milled, dried and screened and then is put in a mold for compaction, and then secondary sintering is performed. The preparation method is high in purity, low in impurity content, low in product device cost and suitable for batch production, and the product is expected to be a novel ceramic material resistant tohigh temperature, oxidation and abrasion.

The invention discloses a preparation method for a nanometer TiO2 modified composite phase change microcapsule. The preparation method comprises the following steps: preparing a core material from n-alkane and alkyl stearate, preparing a wall material from methyl methacrylate, butyl acrylate, ethyl acrylate, a cross-linking agent and nanometer TiO2 and mixing the core material with the wall material so as to obtain an oil phase A; dissolving a reactive emulsifier in deionized water so as to prepare a water phase B; adding the oil phase A into the water phase B and carrying out ultrasonic dispersion so as to form an O / W pre-emulsion; heating the O / W pre-emulsion and adding an initiator into the O / W pre-emulsion so as to prepare a nanometer TiO2 modified composite phase change microcapsule emulsion; and subjecting the nanometer TiO2 modified composite phase change microcapsule emulsion to standing and carrying out filtering, washing and drying so as to obtain the nanometer TiO2 modified composite phase change microcapsule. According to the preparation method, under the condition of usage of reactive emulsifier, nanometer TiO2 is used to modify the wall material, so the phase change microcapsule with a small and uniform size is prepared.

The invention discloses a carbon nano tube / epoxide resin composite material and a preparation method thereof. The preparation method is as follows: weighing certain amount of eposide resin, putting the eposide resin into a flask; adding plasma-grafted and activated carbon nano tube; after water bath and ultrasonic treatments, stirring the mixture under high speed of 600-1000rpm, and removing the babbles under vacuum condition; at the same time heating to 100 DEG C and then adding 4,4-diaminodiphenyl methane which serves as curing agent; stirring under high speed of 600-1000rpm until the mixture is even; pouring the mixture into a silicone rubber mold to be cured; and finally cooling to room temperature along with the furnace. In this way, the carbon nano tube / epoxide resin composite material can be prepared. The invention realizes even dispersion of the carbon nano tube in the matrix of epoxide resin, the amino-group at the chain terminal of the functional carbon nano tube participates in the curing reaction of the epoxide resin and greatly enhances the interface interaction between the carbon nano tube and the matrix, and the composite material prepared through the method has high strength and high heat resistance.

The invention relates to the three dimensional rapid moulding photosensitive resin field, and discloses a photosensitivity siloxane and hyperbranched polyether polyol-containing photosensitive resin composition. The composition is suitable for a light-cured three dimensional rapid moulding technology, and comprises A)a low-viscosity photosensitivity group (methyl) acrylate group-containig siloxane with usage amount being 0.1-30wt%; B) hyperbranched polyether polyol with number-average molecular weight being 400-20000g / mol and usage amount being 0.1-50wt%; C)an epoxide group-containing cation light-cured compound with usage amount being 5-70 wt%; D)an unsaturated bond function group-containing free radical light-cured compound usage amount being 2-30 wt%; E)a cation photoinitiator usage amount being 1-10 wt%; F)a free radical photoinitiator usage amount being 1-10 wt%; G)a filling material usage amount being 1-20wt%; H)other auxiliary materials usage amount being 0.1-5wt%. The photosensitive resin composition has good mechanics, calorifics performance and solidification performance of a solidification object after laser three dimensional rapid moulding.