54results about How to "Reduced thermal performance" patented technology

The invention relates to a composite heat insulation building block which comprises a rectangular building block body, and is characterized in that one side of the rectangular building block body is provided with a group of parallel thermal insulation water-proof chamber (4); the middle part of the rectangular building block is provided with at least one heat insulation chamber (5) which is internally provided with heat insulation fillers (5a); the middle part of the rectangular building block is provided with two parallel heat insulation chambers (5); a leveling groove (7) used for leveling the heat insulation fillers are arranged on a rib plate (6) formed between the heat insulation chambers (5); and the connecting ends at two sides of the rectangular building block are respectively provided with an opening slit building groove (9) and an opening slit building groove (8). The composite heat insulation building block has the advantages of high void content (more than 60%), good heat insulation effect and high strength, and the produced composite heat insulation building brick has light weight, high strength, low water absorption rate, small air shrinkage rate, and good thermal engineering performance, and can meet the design requirement that building energy conservation rate can reach 65%.

The invention relates to a shape memory epoxy resin and a preparation method thereof. The shape memory epoxy resin comprises epoxy resin, a curing agent and hyperbranched polyester at a weight part ratio of 100:(8-80):(3-20). The preparation method comprises the following steps: firstly mixing the epoxy resin and hyperbranched polyester, then adding the curing agent, evenly mixing, then injecting into a die, curing at 50 DEG C-170 DEG C for 1h-6h, then curing at 80 DEG C-200 DEG C for 0h-6h, cooling to room temperature and demoulding, so as to obtain the shape memory epoxy resin. The shape memory epoxy resin has high tenacity within the secondary shape forming temperature range, and has no difference in heat resistance property compared with the corresponding type of shape memory epoxy resin without hyperbranched polyester, is difficult to crack and damage, and has great values on the engineering application aspect of a shape memory epoxy resin-based composite material.

The invention discloses a polyester composition and an application thereof, comprising blends formed by poly(ethylene terephthalate) and poly(ethylene naphthalate) or copolymer formed by ethylene terephthalate units and ethylene naphthalate units; and nucleating agent which accounts for 5ppm-10wt% of the total weight of the polyester combination; in the blends formed by the poly(ethylene terephthalate) and the poly (ethylene naphthalate), the poly(ethylene terephthalate) accounts for 80-99.9mol%, and the poly(ethylene naphthalate) accounts for 0.1-20mol%; in the copolymer formed by the ethylene terephthalate units and the ethylene naphthalate units, the ethylene terephthalate units account for 80-99.9mol%, and the ethylene naphthalate units account for 0.1-20mol%. The composition has good crystallization property, good color tone and low haze. The polyester composition can be used for preparing hot-pressed polymer films.

The invention provides spirofluorene xanthene benzoxazine containing a benzoyloxy group and a preparation method thereof. The method comprises the following steps: by taking spirofluorene xanthene bisphenol as a raw material, reacting spirofluorene xanthene bisphenol with 4-nitrobenzoyl chloride, carrying out a hydrazine hydrate-Pd / C catalytic reduction reaction, thereby obtaining 4-aminobenzoyl spirofluorene xanthene and obtaining a series of benzoxazine monomers through a Mannich condensation reaction. Due to the introduction of spirofluorene xanthene and benzoyloxy group, the polybenzoxazine resin has high glass transition temperature and excellent thermal stability; due to the introduction of alkyl or alkoxy, the thermal performance of the polybenzoxazine resin is reduced, the toughness and processing performance of the polymer are greatly improved, the comprehensive performance is greatly improved, and the polybenzoxazine resin can be widely applied to the fields of photoelectric materials, insulating materials, composite material matrix resins, ablation resistant resins and the like.

The invention discloses an integrated wellhead continuous dosing device which comprises a power end and an overflowing end in mutual connection with each other, wherein the power end comprises a cylinder and a plunger; the cylinder is vertically arranged; the plunger is inserted into a chamber of the cylinder; an extending end of the plunger is connected with a power source; a compression spring for resetting the plunger is arranged between the chamber and the plunger; the overflowing end comprises a channel which is respectively in annular communication with the chamber, a drug kit and a wellhead. Compared with the prior art, the integrated wellhead continuous dosing device has the advantages of simple structure, stability and reliability in work, high adaptive capacity to environment, accurate dosage and convenience in maintenance and repairing.

The invention provides a method for preparing a montmorillonite / graphene oxide aerogel / epoxy resin composite material and relates to a study on single-aspect performance of a double-phase composite material or epoxy resin. The method for preparing the montmorillonite / graphene oxide aerogel / epoxy resin composite material comprises the following steps: after adding expanded graphite to a container under a condition of ice-water bath, adding a mixed solution of concentrated sulfuric acid and concentrated nitric acid to the container; adding potassium permanganate to the container; stirring and heating an obtained mixture; after adding hydrogen peroxide to the mixture till a solution becomes luminous yellow, adjusting the PH value of the solution to 7; centrifuging the solution; freezing and drying the solution to obtain graphene oxide aerogel; taking the graphene oxide aerogel and adding the graphene oxide aerogel to acetone solution; carrying out ultrasonic treatment on an obtained mixture to obtain modified graphene oxide under the nitrogen protection; adding acetone to the modified graphene oxide and modified montmorillonite mixture; adding pre-heated epoxy resin to the modified graphene oxide and modified montmorillonite mixture in advance; and ultrasonically stirring, vacuumizing, heating, curing and cooling an obtained mixture to obtain a three-phase composite material. Themethod for preparing the montmorillonite / graphene oxide aerogel / epoxy resin composite material is used for preparing the montmorillonite / graphene oxide aerogel / epoxy resin composite material.

The invention discloses a heatproof hybrid epoxy resin containing phosphosilicate as well as the preparation method and the application thereof. The preparation method of epoxy resin is that: counting in mass fraction, 100 epoxide polyalkyl silicane, 50 to 120 organic solvent are mixed with 0.001 percent to 0.5 percent catalyst agent of epoxide polyalkyl silicane mass, then under 50 to 120 DEG C, 10 to 40 deionized water is dropwised in mixing solution by hydrolyzing and reflowing for 2 to 8 hours before 1 to 100 active material containing phosphor is added in, and the organic solvent used for reaction is removed after 3 to 10 hours reaction under 100 to 160 DEG C, thus acquiring the heatproof hybrid epoxy resin containing phosphosilicate, the number-average molar mass is 500-6000. After being separately solidified or compound solidified with normal epoxy resin, the heatproof hybrid epoxy resin containing phosphosilicate has the advantages of good mechanical property, flame retardant property and heat-resistant quality, tensile strength up to 43 to 94 Mpa, limiting oxygen index up to 23 to 38 and glass transition temperature up to 165 to 187 DEG C, can be used widely as electronic industrial base material with high-performance.

The invention discloses a pure polylactic acid flocculus and a manufacturing method thereof. The flocculus comprises an upper flocculus, a middle flocculus, and a lower flocculus; and the upper flocculus, the middle flocculus, and the lower flocculus are orderly laminated. The flocculus is characterized in that the upper flocculus and the lower flocculus are both made of a double-component polylactic acid short fiber with a diameter of 1.2 D to 3 D and a length of 38-64 mm, and the middle flocculus is made of a hollow polylactic acid short fiber with a diameter of 3 D to 10 D and a length of 42-76 mm. The manufacturing method does not use glue to adhere the pure polylactic acid flocculi during the production process, so the pure polylactic acid flocculi are not contaminated by other components, and do not contain any other chemical additives. At the same time the elasticity recovery, compression rate, and heat insulating ability of the pure polylactic acid flocculus all meet the industrial standards, furthermore, the pure polylactic acid flocculus has the characteristics of nature, bacterium inhibition, and inability to cause sensitivity, and thus is very suitable for being used as a filling material of bed clothes for the children or the elders.

The invention discloses an integrated wellhead continuous dosing device which comprises a power end and an overflowing end in mutual connection with each other, wherein the power end comprises a cylinder and a plunger; the cylinder is vertically arranged; the plunger is inserted into a chamber of the cylinder; an extending end of the plunger is connected with a power source; a compression spring for resetting the plunger is arranged between the chamber and the plunger; the overflowing end comprises a channel which is respectively in annular communication with the chamber, a drug kit and a wellhead. Compared with the prior art, the integrated wellhead continuous dosing device has the advantages of simple structure, stability and reliability in work, high adaptive capacity to environment, accurate dosage and convenience in maintenance and repairing.

The invention discloses a low-thermal-resistance radiation-resistant nano multilayer film material. The material has a multilayer composite structure formed by cross stacking of metal tungsten nano films and single-layer graphene. A preparation method of the material comprises the following steps: depositing a metal tungsten nano film on a silicon dioxide substrate; transferring single-layer graphene onto the surface of the metal tungsten nano film; and alternately depositing a metal tungsten nano film and transferring single-layer graphene to obtain the low-thermal-resistance radiation-resistant nano multilayer film material. Aiming at the problem that the present bimetal multilayer film structure can greatly lower the thermal property of the material, the material provided by the invention integrates excellent heat-conducting property and radiation resistance and has the multilayer composite structure formed by cross stacking of metal tungsten nano films and single-layer graphene, so that the thermal conductivity lowering caused by the presence of a multilayer film structural interface can be reduced, and the excellent radiation resistance of the material can be kept.

The invention provides application of an active-hydrogen-containing heterocyclic compound to preparation of phthalonitrile resin. The active-hydrogen-containing heterocyclic compound is one of active-hydrogen-containing carbazole, active-hydrogen-containing imidazole, active-hydrogen-containing pyrimidine, active-hydrogen-containing purine, active-hydrogen-containing piperazine, active-hydrogen-containing pyrrole, active-hydrogen-containing pyrazole, active-hydrogen-containing indazole, active-hydrogen-containing indole, active-hydrogen-containing pyrrolo-pyridine and active-hydrogen-containing phthalazinone. According to the new application of the active-hydrogen-containing heterocyclic compound, namely application of the active-hydrogen-containing heterocyclic compound to preparation of phthalonitrile resin, provided by the invention, the active-hydrogen-containing heterocyclic compound is used as a curing agent to accelerate curing of phthalonitrile resin, and meanwhile, heat stability and heat oxygen stability of phthalonitrile resin are improved.

The invention provides a thermosetting alkyl polyol glycidyl ether resin composition and application thereof. The resin composition is prepared by using epoxy resin as a main resin component, wherein the epoxy resin comprises alkyl polyol glycidyl ether which is 50-100 percent of mass of the main resin component. The composition is used for preparing prepregs, laminated boards, printed circuit boards and the like. Since the epoxy resin having an alkyl polyol glycidyl ether molecular structure is adopted as a main resin component, a prepared laminated board has relatively good thermal performance and adhesive performance, and has the advantages of low dielectric performance, low preparation cost, simple method and wide application prospect.

A heat collector of solar energy is composed of a number of gravity heat pipes, a numbers of glass vacuum pipes and a collector. The gravity heat pipes and glass vacuum pipes are level-placed. The energy received from sunlight can not be influenced when water heater is installed on level surface or on vertical surface.

The invention discloses a multifunctional nursing bed for nursing of the nephrology department. The nursing bed comprises a sickbed frame, a fixing cover, a sliding rail, a telescopic blocking cover,an adjusting frame, a clamping plate, a circulation cover, a connecting pipe, a heat supplying pipe, a thermally-insulated cover, a fan, a partition plate, a heater, a heat conducting bar, a filter element, a shell body, a weight displayer, a pothook, a placing groove, a weight sensor, a spring and a supporting plate. The multifunctional nursing bed for nursing of the nephrology department is ingenious in structure and powerful in functions, through the placement design of a combined urine guiding bag, a urine guiding device worn by a patient of the nephrology department can be conveniently stored and detected safely, medical workers can conveniently and quickly know the urine collecting amount, through the cooperative effect of a built-in heating mechanism, moisture of the lower part of the patient body can be effectively reduced, comfort of the patient is improved, the waist part of the patient can be kept warm, the blood circulation is accelerated, the purpose of promoting tissue metabolism is achieved, and finally, the multifunctional nursing bed is beneficial for clinical application and popularization.

The invention discloses an engine connecting rod mechanism with a variable compression ratio. An existing engine connecting rod mechanism is characterized in that once the engine connecting rod mechanism is designed, the compression ratio of an engine cannot be changed through a connecting rod and the performance of the engine cannot be fully exerted due to a fixed compression ratio. According to the engine connecting rod mechanism with the variable compression ratio, the working length of the connecting rod is stretched out and drawn back through connecting rod structures of inner and outer combination bodies; the engine connecting rod mechanism is characterized in that the compression ratio of the engine can be changed and the performance of the engine can be fully exerted.

The invention belongs to the technical field of marine lifesaving equipment, and relates to a low-voltage electric heating warm-keeping lifejacket. The chest and the back waist of a single piece in the back skirt are respectively glued and inlaid with a first electric heating film and a second electric heating film, and the left side of the second electric heating film is glued together. For the thermostat with wires, a third electric heating film is glued and inlaid on the left front chest of the left front jacket, and a fourth electric heating film is glued and inlaid on the right front chest of the right front jacket, and the hat is placed on the inside of the thermal hat. The middle of the back of the head on one side of the expansion layer is glued and inlaid with a fifth electric heating film, the waist and the neck of the thermal hat, the cuffs of the left thermal sleeve and the right thermal sleeve are respectively equipped with built-in fastening belts, and the thermal cap of the thermal cap There is also an upper button on the top, and a lower button on the back of the garment; it is powered by a low-voltage battery to heat and keep warm in a low-temperature environment, and to improve the chances of survival of people who fall into the water; the overall structure is simple, safe and reliable, and the heating voltage is low, keeping warm The effect is good.

The invention relates to a passive-type building stainless steel assembly-type reinforcement structure system. The system comprises multiple main ribs. The main ribs are arranged to be pouring spacesused for pouring a concrete material, threads are arranged on the peripheral surfaces of the main ribs, and the system further comprises multiple sets of hooping. Each set of hooping comprises multiple single ribs, the two ends of each single rib each correspond to one main rib, and the adjacent single ribs are in contact and are welded at the contact points. In the axial direction of the main ribs, two diagonal braces are arranged between every two adjacent single ribs in the same place, the contact points between the single ribs, the diagonal braces and the main ribs as well as the contact points between the diagonal braces are welded, the system further comprises bridge-cut-off thermal insulation rebar components, the bridge-cut-off thermal insulation rebar components are hung and buckled together in a non-contact manner by adopting a stamping structural member shaped like a Chinese character "Ji", and the broken joint parts of the centers of the bridge-cut-off thermal insulation rebar components are subjected to injection molding packaging according to the design intensity. According to the system, the technical problem is effectively solved that in the prior art, the demands of the reinforcement structure for improving the strength and reducing the application amount of stainless steel are difficult to meet at the same time.

The invention discloses a polyester composition and use thereof. The polyester composition comprises a copolymer consisting of an ethylene terephthalate unit and an ethylene naphthalate unit; the ethylene terephthalate unit content of the copolymer consisting of the ethylene terephthalate unit and the ethylene naphthalate unit is 80 to 99.9 mol percent, while ethylene naphthalate unit content is 0.1 to 20 mol percent; and the polyester composition at least contains a compound A which may be an antimony compound or a titanium compound, a compound B which may be a phosphorous compound, and a nucleating agent which is 5ppm to 10 weight percent of the total weight of the polyester composition. The composition has high crystallinity, high tone and low haze, and can be used for preparing a hot-pressed thin polymer film.

The invention relates to a modified rock wool product and a preparation method thereof; the rock wool product is composed of rock wool filaments and a modifier doped with rock wool; the modifier is sprinkled on a rock wool bundle through a vibrating screen above a secondary conveyor belt. The preparation method comprises the preparation steps: carrying out high-temperature melting, centrifugal throwing and high-pressure blowing on raw materials to prepare rock wool yarns, collecting cotton, and conveying, pleating, pressurizing and curing to obtain the rock wool product, wherein a modifier isuniformly added on the rock wool yarns through a vibrating screen above a conveying belt. Existing production equipment is utilized, the modifier is sprinkled to the rock wool bundle through the vibrating screen, and the produced modified rock wool product is low in heat conductivity coefficient and good in heat preservation effect and has the advantages of being simple in technological process, low in production cost and high in engineering applicability.

Provided is an ultra-high pressure brazed connection method for connecting wolfram-diamond / copper-low activation steel. The method relates to the preparation of a water cooling wolfram module of a divertor of a fusion reactor device. The method comprises using the diamond / copper composite materials of different diamond volume ratios as the intermediate layers between the wolfram and the low activation steel, and a layer of CuCrZr or oxygen-free copper (OFC) foil with the thickness of 0.3 mm is added between the diamond / copper composite materials and the wolfram and between the diamond / copper composite materials and the low activation steel, then a cladding type structure is adopted to put the raw materials in a graphite die in sequence, the raw materials are placed into a six-surface diamond presser under the packaging of a steel cup, a magnesium cup, graphite paper and a pyrophyllite wrap sleeve to carry out ultra-high pressure electrifying welding, and wolfram stack-diamond / copper-low activation steel is ultimately formed into an integrate wolfram module at one time. The ultra-high pressure brazed connection method for connecting wolfram-diamond / copper-low activation steel can achieve the welding of the wolfram stack-diamond / copper-low activation steel at one time in a short time, a welding interface is intact, welding strength is high, and the heat-conducting property of the wolfram module is good.

The invention relates to a method for producing lightweight partition batten, and especially relates to a method for producing lightweight partition batten by recycling industrial slag and building garbage. The technical problem that a part of raw material employs large particles with more than 5mm in a partition batten production method in the prior art, so that agglomeration is easy, water absorption is poor, drying shrinkage value and creep value are less, cracking-resistant performance and extensibility are poor, crack is easily generated during the processing process can be solved. According to the invention, industrial slag and building garbage are sorted and screened, the fine stuff with particle size of less than 5 millimeters is taken as a regenerative raw material, industrial slag regenerative particles, building garbage regenerative particles, industrial waste sands, and ceramsite are placed in a mixer for mixing and stirring, cement and fly ash with certain mass percentage are placed in order for secondary mixing and stirring, water is added after second fully mixing and stirring for third stirring, and a mixture for producing the lightweight partition batten can be finally obtained.

The invention provides a preparation method of a steel surface DLC (diamond-like carbon) coating structure based on ionic nitriding and multi-layer compounding, and belongs to the field of steel surface coating materials. The coating comprises a steel matrix surface ion nitriding layer, a Cr transition layer, a gradient change Cr / WC transition layer, a W-doped DLC layer and a hydrogen-containing DLC layer. Through the design of the DLC coating, gradient increase of the hardness of the coating is realized, and the internal stress of the coating is effectively released, so that the binding force of a film substrate is improved, and the thermal stability of the coating is improved. The coating can effectively improve the wear resistance and corrosion resistance of the steel for the special structure, better meet the protection requirement of the steel for the special structure, and greatly prolong the service life of the steel for the special structure.

The invention discloses a down fabric, which sequentially comprises a fabric outer layer, a down layer and an inner lining layer from top to bottom, wherein the fabric outer layer and the down layer as well as the down layer and the inner lining layer are respectively and independently adhered by adhesion layers, the fabric outer layer is prepared from the following raw materials by weight: 50-70parts of polypyrazolo[1,5-A]-1,3,5-triazine-2,4(1H,3H)-dione 3-(tert-butyldimethylsiloxy)glutarate, 20-30 parts of poly bis(carboxyethylgermanium sesquioxide) polytetrahydrofuran glycol ester, and 10-15 parts of graphene oxide. According to the present invention, the down fabric has advantages of excellent gas permeability, excellent down penetration prevention effect, excellent water resistance,excellent cold resistance, excellent weather resistance, excellent flame retardancy and good hand feeling, and further has health-care function of blood circulation promoting.

The invention relates to a modified poly(p-phenylenebenzobisoxazole) (PBO) fiber and a preparation method thereof. According to the fiber, the main problem of poor pressure resistance of the PBO fiber is solved. The preparation method comprises the steps of reacting by virtue of 2-hydroxyl dimethyl terephthalate, an amine source and paraformaldehyde as raw materials so as to prepare terephthalic acid containing an oxazine side group, reacting by virtue of o-amino-phenol hydrochloride, terephthalic acid and terephthalic acid containing the oxazine side group as raw materials so as to prepare modified PBO containing the oxazine side group, carrying out dry-jet wet spinning method to an obtain original benzoxazine grafted modified PBO fiber, and carrying out thermal treatment and benzoxazine open loop crosslinking on the original benzoxazine grafted modified PBO fiber, so as to obtain the modified PBO fiber. The preparation method has the advantages that by introducing an oxazine structure to the side groups of PBO molecular chains, the tensile property of the fiber is hardly influenced; and oxazine is subjected to open loop crosslinking during the thermal treatment of the fiber, and the PBO molecular chains are chemically crosslinked, so that the pressure resistance of the fiber can be substantially improved.

The invention discloses a PBO fiber sizing agent containing a benzoxazole diamine compatibilizer and an application thereof. The sizing agent is modified by silane coupling agent SiO 2 , benzoxazole diamine, epoxy resin and organic solvent; the mass percent composition of sizing agent is as follows: silane coupling agent modified SiO 2 0.1-5%; benzoxazole diamine 0.1-1%; epoxy resin 0.5-3%; the balance organic solvent. Compared with the unmodified PBO fiber, the IFSS of the PBO fiber / epoxy resin composite material modified by using the sizing agent prepared by the invention can be increased by 55-95%. In addition, the surface treatment method used in the present invention is a dip-coating method, which is simple to operate, has mild conditions, does not cause a decrease in the mechanical and thermal properties of the PBO fiber, and has good repeatability and is easy for industrial production.

The invention relates to a manufacturing method of a silk rabbit wool and polyester blended fabric. The manufacturing method comprises the following steps: taking 58-62% by weight of long wool, 25-29%by weight of polyester, 8-12% by weight of non-degummed raw mulberry silk and 2-4% by weight of rabbit wool as raw materials; combing and spinning the long wool into wool strips, preparing the rabbitwool, mulberry silk and the polyester into mixed strips through a cotton spinning process, dissolving sericin protein on the surface of the mulberry silk in the mixed strips and permeating the sericin protein into the mixed strips through a degumming process, and irreversibly denaturing the sericin protein permeated into the mixed strips through a denaturing process of the degummed mixed strips to adhere the rabbit wool; and then blending and mixing the mixed strips and the wool strips, and sequentially carrying out roving, spinning, winding, doubling, double twisting, weaving, dyeing and finishing to obtain the silk rabbit wool and polyester blended fabric. The obtained fabric has the advantages of low cost, high heat retention performance, soft and smooth hand feeling, rich velvet feeling, difficulty in pilling and difficulty in unhairing.