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58results about How to "High volume expansion" patented technology
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Technology of high polymer material post-grouting squeezed cast-in-place pile
ActiveCN102587358AImprove waterproof performanceImprove protectionBulkheads/pilesEconomic benefitsQuality control
Disclosed is construction technology of high polymer material post-grouting squeezed cast-in-place pile. The technology includes that a conventional bored pile is adopted for forming a hole, a grout filling bag is arranged on a reinforcement cage with a designed depth, the reinforcement cage sinks, concrete is cast, high polymer materials are in pressure grouting for the filling bag at a designed position by the aid of a grouting line after the pile building concrete is initially set, and a high polymer material post-grouting squeezed branch and an expanded-base grouting pile are formed. Construction process of a squeezed branch pile and technology of a post-grouting cast-in-place pile are optimized by a method, and problems of squeezing hole collapse of a traditional squeeze branch pipe, excessive scum at a pile end and the like are avoided. In addition, a large quantity of expenditure and construction period can be saved, the high polymer grouting technology is favorable for environmental protection and energy economization, and the quality is easy to control. Besides, the method is simple in construction process, high in operability, convenient in quality control, and remarkable in economic benefit and the effect of management of a soft soil foundation.
Owner:HOHAI UNIV
Thixotropic chemical sealing channeling agent
ActiveCN102181274AFormation damage is smallImprove construction safetyDrilling compositionSealing/packingChemistryCarbon black
The invention provides a thixotropic chemical sealing channeling agent. The sealing channeling agent comprises the following raw materials: 40 to 55 weight parts of iron rich low-carbon sulfur aluminate, 0.2 to 5.0 weight parts of sodium-based bentonite, 0.5 to 2.0 weight parts of fluid loss agent, 0.2 to 5.0 weight parts of white carbon black, 0.5 to 4.0 weight parts of cyclodextrin and / or starch and 30 to 50 weight parts of water. The chemical sealing channeling agent has the characteristics of strong adhesion and thermal stability, good durability, prominent cracking resistance and the like; the linear expansion rate reaches over 0.2 percent, the compressive strength reaches over 30MPa, and the shearing strength reaches over 10MPa; and by adding dispersant, fluid loss agent and thixotropic regulator, the sealing channeling agent has high thixotropic property and loss resistance.
Owner:PETROCHINA CO LTD
Adhesive for insulative articles
ActiveUS20160263876A1Simple compositionLess timeMonocarboxylic acid ester polymer adhesivesNon-fibrous pulp additionCelluloseEmulsion
An adhesive composition that improves structural integrity and insulative properties when applied to a cellulosic substrate is provided. The adhesive composition includes a plurality of microspheres and an emulsion-based polymer that has (i) an elastic modulus greater than 0.5 MPa in the range temperature range of 70° C. to 110° C.; (ii) an absolute log(E) / T slope of less than 0.05 in the range temperature range of 70° C. to 110° C.; and (iii) a tan d value less than 0.6 at 90° C.
Owner:HENKEL KGAA
Adhesive and modified EVA (ethylene vinyl acetute) foaming composite for automobiles
The invention discloses adhesive and modified EVA (ethylene vinyl acetute) foaming composite for automobiles. The foaming composite consists of the following components in parts by weight: 60-80 parts of EVA resin; 5-15 parts of epoxy resin; 5-25 parts of foaming agent; 0.1-5 parts of foaming accelerator; 0.1-5 parts of cross-linking agent; 0.1-5 parts of curing agent; 0.1-5 parts of curing accelerator; 0.1-5 parts of tackifier and 0.1-20 parts of filler. The obtained foaming composite can foam at the temperature range of 140-210 DEG C; and with uniform foam holes, high volume expansion ratioand excellent adhesive force with steel sheets or galvanized steel sheets, the adhesive and modified EVA (ethylene vinyl acetute) foaming composite can fill or seal the cavity of an automobile body and play sound-insulation and vibration-reduction roles.
Owner:广东时利和汽车材料有限公司
Cross flange seal for a pressure vessel, especially for a turbomachine casing
The invention relates to a pressure vessel for a machine, especially a turbomachine, which comprises at least 3 casing shell sections, wherein the intersection region of the parting joints is sealed off by a plug which in its interior has a system of holes and passages through which a sealing compound is pressed into the region between plug and casing shell sections, so that after its setting, an elastic, leakproof and non-destructively disassemblable sealing of the intersection region of the parting joints is created. The plug can be fastened on the casing shell sections by means of an integrated flange.
Owner:ANSALDO ENERGIA SWITZERLAND AG
Grouting reinforcement and earthquake resisting method for earth and rockfill dam
ActiveCN102605750AHigh tensile strengthIncrease elasticityEarth-fill damsRock-fill damsPre embeddingSeismic resistance
The invention discloses a grouting reinforcement and earthquake resisting method for an earth and rockfill dam, which includes the technical steps: using a drilling machine to drill holes at certain intervals on the upstream top and the downstream top of a dam in a range from one-quarter dam height to one-fifth dam height during filling of the dam; driving grouting casings for drilling supporting or pre-embedding horizontal grouting casings with holes in real time; injecting polymer materials into the grouting casings through grouting pipes; allowing the polymer materials to chemically react in the grouting casings and quickly swell and allowing the polymer materials to permeate into surrounding rockfill to be cemented with rockfill through voids inside the rockfill; and forming a solid flexible reinforced complex so that cohesion of rockfill complex is increased and seismic resistance of the dam is improved. The method is applicable to newly built earth and rockfill dams, is also applicable to earth and rockfill dams built already, and is fast in construction, the reinforcement is the flexible complex and adaptable to deformation of the dam under the action of seismic load, and good seismic resisting effect is achieved.
Owner:HOHAI UNIV
Rechargeable battery
InactiveUS20110070471A1High expansion rationExcellent efficiencyFinal product manufactureWound/folded electrode electrodesVolume expansionElectrical and Electronics engineering
The present invention relates to a rechargeable battery that can use a negative electrode active material having a high volume expansion rate by receiving volume variation of an electrode assembly in a case. The rechargeable battery according to the present invention includes i) an electrode assembly including a positive electrode plate, a negative electrode plate, and a separator that are wound in a jelly roll shape to have a flat portion and curved portions disposed at both sides of the flat portion, ii) a case for receiving the electrode assembly, and iii) a cap assembly combined with the case to close and seal the case and that is electrically connected to the electrode assembly. When a direction that is perpendicular to a surface of the separator disposed in the flat portion is set to a first direction, the thickness of the flat portion measured along the first direction is smaller than the maximum thickness of the curved portion measured along the first direction.
Owner:SAMSUNG SDI CO LTD
Method for forming thermoplastic polyester elastomer closed pore micro-foaming product
The invention discloses a method for forming a thermoplastic polyester elastomer closed pore micro-foaming product, which comprises the following steps of: filling a thermoplastic polyester elastomer into a forming die with capillary through holes, putting the forming die into a high-pressure container, injecting a gas into the high-pressure container to displace air in the high-pressure container, adjusting the temperature of the high-pressure container to between 160 and 220 DEG C and adjusting the pressure to between 8 and 30MPa, keeping the high-pressure container for 10 to 50 minutes at a constant temperature under a constant pressure, then reducing the pressure of the high-pressure container to the atmospheric pressure at the speed of 200 to 700MPa / s, taking the forming die out, and cooling and removing the forming die to obtain the thermoplastic polyester elastomer closed pore micro-foaming product, wherein the gas is nitrogen or carbon dioxide. The method has simple process, is convenient to operate and control, and can obtain the micro-foaming polyester elastomer product with smaller foam pore size, higher foam pore density, more uniform foam pore structure and more excellent damping impact resistance.
Owner:中广核俊尔(上海)新材料有限公司 +1
Conductive sheet and electrode
ActiveUS20110318642A1Improve discharge performanceLower resistanceHybrid capacitor electrodesLayered productsFiberPolymer science
The present invention provides a conductive sheet having a surface resistance of 10 Ω / sq or lower on both surfaces, the conductive sheet comprising a sheet (A) and a sheet (B) laminated to the sheet (A), the sheet (A) having an apparent specific gravity of 0.05 g / cm3 to 0.50 g / cm3 and being formed from fibers having a diameter within the range between 3 and 20 μm, and the sheet (B) being formed from fibers having a diameter of 3 μm or smaller. The sheet (A) may be a fibrous material comprises an organic polymer fiber as its main component.
Owner:KURARAY CO LTD
Deep-fried dough stick not using additive containing aluminium and making method thereof
InactiveCN101756100AHas an aluminum-free compositionReduce manufacturing costBakery productsFood preparationSodium bicarbonateAdditive ingredient
The present invention relates to a deep-fried dough stick not using additives containing aluminium and a making method thereof, which belong to the food field. The deep-fried dough stick not using additives containing aluminium is made by using flour as a raw material and using sodium bicarbonate, ammonium bicarbonate and salt as auxiliary materials. The deep-fried dough stick not using additivescontaining aluminium is made by the steps: (1) making dough: the flour and the auxiliary materials are weighed by a ratio, the auxiliary materials are added to the flour after being dissolved by a proper amount of water, and the dough is made by uniformly agitating the mixture; (2) fermenting the dough: the dough is wrapped by a preservative film and placed in a place at a temperature of 5 DEG C to 30 DEG C for 6 to 12 hours; (3) making small strips: the dough fermented is made into small strips; (4) frying: the small strips made are put in a heated oil pot to be fried; (5) draining oil: the deep-fried dough sticks are taken out of the pot to drain oil. The deep-fried dough stick not using additives containing aluminium has the characteristics of no aluminium ingredient, low making cost, large volume expansion rate, golden yellow appearance, crispy external, soft internal, dense holes and crispy and palatable taste.
Owner:金华市卫生监督所
Temperature switch based on phase change and volume change effect of low-melting point metal
ActiveCN102592883ASensitive to temperatureRapid responseThermal switch detailsHeat managementEngineering
The invention relates to a temperature switch based on phase-change effect of a low-melting point metal, which comprises a hollow shell, a fixed rod, a hollow piston, a spring and a liquid metal filled between the fixed rod and the hollow piston, wherein at least one inlet and one outlet for ingress and egress of a fluid are arranged on the hollow shell; the fixed rod is fastened on the inner bottom surface of the hollow shell; the piston is tightly sheathed on the outer wall of the fixed rod, and two ends of the piston are respectively connected with the shell and the piston; and when the temperature changes and the low-melting point metal generates phase change, the piston can move relative to the fixed rod under the actions of an expansive force of the metal and a returning force of the spring, and the fluid inlet and outlet on the shell opens or shuts caused by the movement of the piston, so that the functions of open and shut at different temperatures are realized. By fully utilizing the heat physical properties of high heat conductivity and low thermal capacity of the liquid metal, the temperature switch responds very sensitive; simultaneously, because the liquid metal is numerous in variety, the temperature switch is wide in the selection of threshold; and the temperature switch can be widely applied to the fields of intelligent building, residual-heat utilization, industrial heat management, microfluidic chips and the like.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Citrus fiber mousse yogurt and preparation method thereof
InactiveCN109938100AImprove water holding capacityBubble stabilizationMilk preparationFiberProduct system
The invention discloses citrus fiber mousse yogurt and a preparation method thereof, and belongs to the technology field of dairy product processing. The yogurt is prepared from, by weight, 500-900 parts of raw milk, 0-100 parts of sugar, 10-300 parts of single cream or anhydrous milk fat, 2-50 parts of citrus fiber, 0-30 parts of dried skim milk, 0-30 parts of milk protein concentrate, 5-20 partsof whey protein, 5-30 parts of a compound emulsifying stabilizer, 0-10 parts of a compound sweetener and 0.02-0.08 part of a starter; after fermentation demulsification, direct agitating beating or sterile nitrogen filling is conducted, and the volume expansion rate is 20-100%. The obtained mousse yogurt still has the capacity of supporting the yogurt structure and keeping bubbles stable at the low pH value (pH=4.0-4.6), and the product system is made to be stable and superior to the existing products. The texture is dense, the taste is smooth, and meanwhile the dietary fiber function is achieved.
Owner:山东乐檬生物科技有限公司
Rechargeable battery with larger curved ends having different radius of curvature
InactiveUS8999543B2Increase capacityHigh outputFinal product manufactureWound/folded electrode electrodesElectricityVolume variation
The present invention relates to a rechargeable battery that can use a negative electrode active material having a high volume expansion rate by receiving volume variation of an electrode assembly in a case. The rechargeable battery according to the present invention includes i) an electrode assembly including a positive electrode plate, a negative electrode plate, and a separator that are wound in a jelly roll shape to have a flat portion and curved portions disposed at both sides of the flat portion, ii) a case for receiving the electrode assembly, and iii) a cap assembly combined with the case to close and seal the case and that is electrically connected to the electrode assembly. When a direction that is perpendicular to a surface of the separator disposed in the flat portion is set to a first direction, the thickness of the flat portion measured along the first direction is smaller than the maximum thickness of the curved portion measured along the first direction.
Owner:SAMSUNG SDI CO LTD
Eggshell-yolk structured cobaltosic oxide-nitrogen doped carbon/carbon nanocage composite material and preparation method and application thereof
ActiveCN111193014AImprove cycle stabilityAlleviate volume expansionMaterial nanotechnologyCell electrodesYolkMetal-organic framework
The invention discloses an eggshell-yolk structured cobaltosic oxide-nitrogen doped carbon / carbon nanocage composite material and a preparation method and application thereof. The preparation method comprises the following steps: 1) preparing a carbon nanocage; 2) growing a metal organic framework ZIF-67 crystal in the carbon nanocage prepared in the step 1) in a confinement manner to obtain a ZIF-67 / carbon nanocage composite material; 3) taking the ZIF-67 / carbon nanocage composite material as a precursor, and performing high-temperature calcination to form a cobaltosic oxide-nitrogen-doped carbon / carbon nanocage porous nano composite material; and 4) taking the cobaltosic oxide-nitrogen-doped carbon / carbon nanocage porous nano composite material as the anode material of the lithium ion battery. The composite material prepared by the invention has the advantages of high capacity, good rate capability, strong cycling stability, simple preparation process and the like.
Owner:SOUTHEAST UNIV
Polymer gravel pile grouting method
Owner:HENAN POLYTECH INFRASTRUCTURE REHABILITATION
Polymer multi-edge pile grouting method
ActiveCN103233473AImprove tensile propertiesQuick buildBulkheads/pilesSocial benefitsChemical reaction
Owner:SAFEKEY ENG TECHZHENGZHOU
Asynchronous combustion system
InactiveUS8266884B1Reduce needImprove efficiencyContinuous combustion chamberEfficient propulsion technologiesCombustion systemCombustion
A device and method that converts the high temperature produced by combustion into a fluid volume of high pressure gas without requiring a boiler or heat exchanger. By injecting a fluid directly into a combustion system, heat energy that may otherwise be wasted is converted directly into high pressure gas.
Owner:BAKER MARK
High-temperature-resistant gel plugging agent for oil-based drilling fluid as well as preparation method and application of high-temperature-resistant gel plugging agent
ActiveCN112341997AHigh strengthGood pollution effectDrilling compositionSealing/packingPolymer scienceEthyleneglycol dimethacrylate
The invention provides a high-temperature-resistant gel plugging agent for an oil-based drilling fluid as well as a preparation method and application of the high-temperature-resistant gel plugging agent. The gel plugging agent is prepared from the following raw materials in parts by weight: 15-30 parts of gel, 2-7 parts of a cross-linking agent, 0.3-1 part of an initiator and 60-80 parts of baseoil, wherein the gel is a combination of two or more than three of diethylene glycol dimethacrylate, pentanediol diacrylate, hexadecyl methacrylate and polyurethane resin, and the cross-linking agentis two or three of dibutyl ammonium oleate, zinc acrylate and divinyl benzene. The plugging agent disclosed by the invention enters a crack under the action of pressure difference and is automaticallygelatinized to form high-strength and high-temperature-resistant gel, so that the crack is plugged; the plugging agent is good in oil-based drilling invasion resistance, can act on cracks within a certain width range, has a good plugging effect on malignant leakage, and has the advantages of being resistant to high temperature, high in volume expansion speed, high in gel forming strength, controllable in gel forming time and the like.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Method for the production of electrodes and electrodes made using such a method
ActiveUS20160093872A1Low electrode porosityReduce twistLiquid surface applicatorsSolid electrolytic capacitorsCouplingParamagnetic nanoparticles
A method for the manufacturing of electrodes with at least one porous surfacial layer comprising anisotropic electrochemically active particles. It also relates to electrodes made using such a method. The method comprises the following steps: (a) coupling of paramagnetic nanoparticles to said active particles for the generation of composites; (b) preparation of a slurry of said composites, including a solvent mixed with a binder able to release a volatile component; (c) application of said slurry to a substrate to form a film; (d) application of a magnetic field to the film and orienting said active particles leading to a substrate in which said active particles are arranged with their shortest axes aligned along a preferred axis parallel to said substrate; (e) during or after application of said magnetic field evaporation of said solvent with solidification of the binder and release of said volatile component under formation of said surfacial layer.
Owner:ETH ZZURICH
Aqueous polyurethane gel, process for producing same, and use thereof
The invention provides a polyurethane hydrogel, which, under the condition of the presence of water, has a water-resin (C) weight ratio of greater than 9:1, through which the polyurethane resin (C) containing terminal isocyanate crosslinking and curing preparation. The above resin (C) is a reaction product of a polyisocyanate (A) and a liquid polyhydroxy compound (B) containing 70% or more of a random copolymer in ethylene oxide When the weight ratio of alkane (a) to propylene oxide (b) is 50:50 to 90:10, it is obtained by copolymerizing ethylene oxide (a) and propylene oxide (b). The invention also provides a preparation method and application of the polyurethane hydrogel.
Owner:KANSAI PAINT CO LTD +1
Hole-sealing slurry and preparation method thereof
The present invention provides hole-sealing slurry and a preparation method thereof, and relates to the field of hole-sealing materials, and the hole-sealing slurry comprises the following raw materials by weight: 330-400 parts of cement, 590-670 parts of sand, 3-10 parts of a water reducer, 40-70 parts of an expanding agent, 0.2-0.5 part of aluminum powder, 3-7 parts of an air-entraining agent and 0.3-0.7 part of cellulose. The preparation method of the hole-sealing slurry is as follows: adding the raw materials into a raw material mixer to mix evenly. The hole-sealing material is fast in solidification speed, high in compressive strength and large in volume expansion rate, after 28 days, the strength is up to 20MPa or more, the volume expansion reaches 2.3%, and the preparation process is simple.
Owner:TAIYUAN CITY TIANDINGHENG CONCRETE ADMIXTURES TECH DEV CO LTD
Macromolecule absorbent with modified high thermal stability based on nanosilicon dioxide polylactic acid and preparation method thereof
InactiveCN104987464AImprove the three-dimensional network structureHigh oil absorption rateOther chemical processesPhosphateFire resistance
The invention discloses a macromolecule absorbent with modified high thermal stability based on nanosilicon dioxide polylactic acid and a preparation method thereof. The macromolecule absorbent is characterized in that the macromolecule absorbent comprises, by weight, the following raw materials of 26-28 parts of cyclohexyl acrylate, 17-20 parts of butyl acrylate, 3-4 parts of polylactic acid, 3-4 parts of nanosilicon dioxide, 0.3-0.4 part of gamma-methacrylamide acyloxy propyl trimethoxy silane, 0.16-0.2 part of acrylic ester, 4-5 parts of carboxymethylcellulose, 22-24 parts of ethyl acetate, 1-1.2 parts of benzoyl peroxide, 0.9-1.2 parts of p-methylstyrene, 1.8-2.5 parts of divinyl benzene, 1-2 parts of nano aluminum hydroxide, 0.05-0.07 part of silane coupling agent kh450, 1-1.2 parts of di (isooctyl) phosphate, 0.5-0.6 part of silicone oil and moderate distilled water. The macromolecule absorbent with modified high thermal stability based on the nanosilicon dioxide polylactic acid is of a double-layer porous structure, a big volume expansion ratio is achieved, the thermal stability is high, and certain fire resistance is achieved.
Owner:ANHUI CHENGFANG NEW MATERIAL TECH
Al-Sn film negative electrode and preparation method thereof
ActiveCN103268933ADesignableAlleviate the volume expansion effectCell electrodesResistProtection layer
The present invention discloses an Al-Sn film negative electrode and a preparation method thereof. The preparation method comprises the following steps: a, depositing an aluminum film on a brass substrate; b, adopting the sample obtained in the step a as a substrate, and adopting PMMA as an electron beam resist to prepare a hole array microstructure on the substrate; c, adopting PMMA as a protection layer, and carrying out an etching treatment on the sample obtained in the step b to obtain a hole array microstructure on the aluminum film; d, adopting the substrate with the microcosmic structure in the step c as a substrate, and adopting pure Sn as a target to deposit the pure Sn; and e, adopting hot acetone to remove the resist PMMA to obtain the Al-Sn film negative electrode. The method has advantages of designability, controllability, high flexibility and the like, wherein artificial control and design can be performed on Al-Sn distribution so as to buffer a volume expansion effect during a lithium ion battery charge and discharge reaction process and carry out quantitative analysis on volume structure change.
Owner:SOUTH CHINA UNIV OF TECH
Chemical plugging rubber plug, preparation method and application thereof
ActiveCN109943302AImprove rheologyGood expansion performanceDrilling compositionSealing/packingFluid phaseSulfur hydride
This invention provides a chemical plugging rubber plug, a preparation method and application thereof, and belongs to technical field of oil and gas exploration and development. The chemical pluggingrubber plug comprises the following preparation raw materials by weight: 100 parts of a basic liquid including a resin base liquid and a flow pattern regulator; 1-5 parts of an expansion agent including a liquidoid expansion agent and a solidoid phase expansion agent; 1-25 parts of a gelatinizer. The chemical plugging rubber plug takes the base liquid composed of resin base liquid and flow pattern regulator as the main body, and cooperates with the expansion agent and the thickener, so the obtained chemical sealing rubber plug has the advantages of good rheological properties, excellent expansion property and elastic toughness, high bearing strength, strong corrosion resistance to acid, alkali, salt and hydrogen sulfide, irreversible sealing and long validity period.
Owner:JINGZHOU JIAHUA TECH
Fried bread stick with function of clearing heat and preparation method of fried bread stick
InactiveCN106135350AWith heat-clearing functionHeat-clearing and detoxifyingDough treatmentBakery productsFlavorVegetable oil
The invention discloses a fried bread stick with a function of clearing heat. The fried bread stick is prepared from the following raw materials in parts by weight: 100 to 200 parts of wheat flour, 10 to 50 parts of gluten powder, 1 to 10 parts of traditional Chinese medicinal extracting solution, 1 to 10 parts of pineapple juice, 30 to 100 parts of vegetable oil, 5 to 10 parts of aluminum-free leavening agent, 0.5 to 3 parts of edible salt and 10 to 50 parts of water. A preparation method of the fried bread stick comprises the following steps: firstly, kneading dough for the first time; secondly, performing fermentation for the first time; thirdly, kneading dough for the second time; fourthly, preparing small sticks; fifthly, frying; sixthly, draining oil to obtain the fried bread stick with the function of clearing heat. The preparation method of the fried bread stick is simple; the raw materials are reasonably combined and supplement each other; the prepared fried bread stick is balanced and comprehensive in nutritional ingredients, and unique in mouthfeel and flavor, and also has the efficacy of clearing heat and resisting inflame.
Owner:GUANGXI UNIV
Polyethylene/rubber expansion rubber brick for automobile and preparation method thereof
The invention discloses a polyethylene / rubber expansion rubber brick for an automobile and a preparation method thereof. The expansion rubber brick is prepared by using polyethylene and rubber as raw materials, then adding foaming agent, foaming promoter, cross linking agent, cross linking assistant, tackifying resin and fire retardant, and performing the processes of mixing, milling, prilling and extrusion molding to prepare the high performance expansion rubber brick which integrates the functions of foaming expansion, bonding, fire retardant and the like and is provided with even texture. The preparation method provided by the invention has the advantages ofsimple process and low preparation cost; and the product has the advantages of high bulk expansion ratio, excellent filling and sealing properties, fire resistance, good bonding performance to the steel plate, even structure, stable performance and pollution-free preparation process.
Owner:HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
Adhesive for insulative articles
ActiveUS9849655B2Less timeHigh volume expansionMonocarboxylic acid ester polymer adhesivesNon-fibrous pulp additionCellulosePolymer science
Owner:HENKEL KGAA
Sleeve grouting material for prefabricated part and preparation method of material
ActiveCN112707683AReduce surface tensionReduce brittle weaknessesSolid waste managementPolymer scienceSuperplasticizer
The invention belongs to the field of prefabricated part building materials, and particularly relates to a sleeve grouting material for a prefabricated part and a preparation method of the material. The grouting material is formed by mixing sleeve grouting material dry powder for prefabricated parts with water and a polycarboxylate superplasticizer. The grouting material dry powder is prepared from the following components in parts by weight: 70 to 100 parts of cement, 75 to 100 parts of mixed sand, 20 to 30 parts of glass powder, 1 to 3 parts of expanding agent, 1 to 3 parts of thickening agent and 1 to 3 parts of toughening agent; the mass ratio of the sleeve grouting material dry powder for the prefabricated part to water is 1:(0.1-0.15); and the polycarboxylate superplasticizer is a comprehensive shrinkage-reducing polycarboxylate superplasticizer, the mixing amount of the polycarboxylate superplasticizer is 2%-3%, and the polycarboxylate superplasticizer has the effects of defoaming and low hydration heat. According to the introduced comprehensive shrinkage-reducing type polycarboxylate superplasticizer, the influence of bubbles of the polycarboxylate superplasticizer in the using process can be effectively reduced, the hydration heat of cement can be reduced, shrinkage of the sleeve grouting material in the using process of a prefabricated part is reduced, and large-scale application and popularization of the prefabricated part are facilitated.
Owner:FUJIAN KZJ NEW MATERIALS CO LTD +1
Temperature switch based on phase change and volume change effect of low-melting point metal
ActiveCN102592883BSensitive to temperatureRapid responseThermal switch detailsHeat managementEngineering
The invention relates to a temperature switch based on phase-change effect of a low-melting point metal, which comprises a hollow shell, a fixed rod, a hollow piston, a spring and a liquid metal filled between the fixed rod and the hollow piston, wherein at least one inlet and one outlet for ingress and egress of a fluid are arranged on the hollow shell; the fixed rod is fastened on the inner bottom surface of the hollow shell; the piston is tightly sheathed on the outer wall of the fixed rod, and two ends of the piston are respectively connected with the shell and the piston; and when the temperature changes and the low-melting point metal generates phase change, the piston can move relative to the fixed rod under the actions of an expansive force of the metal and a returning force of the spring, and the fluid inlet and outlet on the shell opens or shuts caused by the movement of the piston, so that the functions of open and shut at different temperatures are realized. By fully utilizing the heat physical properties of high heat conductivity and low thermal capacity of the liquid metal, the temperature switch responds very sensitive; simultaneously, because the liquid metal is numerous in variety, the temperature switch is wide in the selection of threshold; and the temperature switch can be widely applied to the fields of intelligent building, residual-heat utilization, industrial heat management, microfluidic chips and the like.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Thixotropic chemical sealing channeling agent
ActiveCN102181274BMake full use of production capacityImprove efficiencyDrilling compositionSealing/packingSodium BentoniteCyclodextrin
The invention provides a thixotropic chemical sealing channeling agent. The sealing channeling agent comprises the following raw materials: 40 to 55 weight parts of iron rich low-carbon sulfur aluminate, 0.2 to 5.0 weight parts of sodium-based bentonite, 0.5 to 2.0 weight parts of fluid loss agent, 0.2 to 5.0 weight parts of white carbon black, 0.5 to 4.0 weight parts of cyclodextrin and / or starch and 30 to 50 weight parts of water. The chemical sealing channeling agent has the characteristics of strong adhesion and thermal stability, good durability, prominent cracking resistance and the like; the linear expansion rate reaches over 0.2 percent, the compressive strength reaches over 30MPa, and the shearing strength reaches over 10MPa; and by adding dispersant, fluid loss agent and thixotropic regulator, the sealing channeling agent has high thixotropic property and loss resistance.
Owner:PETROCHINA CO LTD
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