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399results about How to "High compressive strength" patented technology

Nanometer composite high-molecular dual-network hydrogel and preparation method thereof

The invention provides a high-strength nanometer composite high-molecular dual-network hydrogel and a preparation method thereof, and belongs to the technical field of composite modification of hydrogels. The preparation method of the high-strength nanometer composite high-molecular dual-network hydrogel comprises the following steps of: firstly dissolving a first network monomer, a cross-linking agent and an initiating agent into a water dispersion liquid which contains nanometer particles, and pouring an obtained mixed solution into a mould for heating polymerization to obtain a first network hydrogel; dissolving a second network monomer, the cross-linking agent and the initiating agent into water, placing the first network hydrogel into the solution, swelling for 24 hours, and then carrying out the heating polymerization to obtain the high-strength nanometer composite high-molecular dual-network hydrogel. The high-strength nanometer composite high-molecular dual-network hydrogel provided by the invention is simple in preparation process and superior in property, can be used for enhancing the compression strength of the dual-network hydrogel and keeping higher tensile strength through nanometer enhancement and is widely applied to the fields of biological medicine, agriculture, a building industry, a chemical industry, a mining industry, and the like.
Owner:JIANGNAN UNIV

Method for preparing sintered ore by using high-chromium-type vanadium-titanium mixture

ActiveCN104630449AHigh compressive strengthBreathability does not decreaseChromiumTitanium
The invention discloses a method for preparing sintered ore by using a high-chromium-type vanadium-titanium mixture, belonging to the technical field of metallurgy. The method comprises the following steps: (1) preparing high-chromium-type vanadium-titanium magnetite concentrate, iron ore powder and return mine to serve as raw materials, screening one part with the granularity of less than 0.106mm to serve as fine aggregate, and taking the rest part as coarse aggregate; (2) weighing a part accounting for 20-80 percent of the fine aggregate to serve as a mini-pellet raw material, and mixing with quick lime and coke powder, thereby obtaining the mini-pellet material; (3) taking the rest fine aggregate and all the coarse aggregate as the mixed raw materials, and mixing with quick lime, limestone, magnesite ore and coke powder, thereby obtaining the mixed materials; (4) preparing the high-chromium-type vanadium-titanium mixed materials; (5) distributing in a sintering machine while controlling the distribution thickness at 600-800mm, igniting, exhausting air and sintering; and (6) crushing and screening, thereby obtaining the product. According to the method disclosed by the invention, one part of materials with the granularity of less than 0.106mm can be prepared into mini pellets, so that the product has high compressive strength, and when the height of the sintered mixture layer is increased, the breathability of the sintered mixture layer is not reduced.
Owner:NORTHEASTERN UNIV

Insulation system with polycrystalline insulation mortar

The invention discloses an insulation system with polycrystalline insulation mortar, which belongs to the technical field of the building material. The insulation system comprises interface mortar, insulation mortar and waterproofing mortar, wherein the insulation mortar comprises the following components: cement, redispersable latex powder, cold water type polyvinyl alcohol, hydroxypropyl-methylcellulose ether, air entraining agents, sodium silicate, inorganic retarder and polystyrene particles. Compared with the prior art, the invention has the following advantages of: 1, solving the problem that the bonding strength of the inorganic cementitious material for penetration is not sufficient, and significantly improving the bonding strength and the compressive strength of the whole insulation system; 2, improving the construction property of the material and the insulation effect of the system; 3, improving the construction property and enhancing the long-term strength of the product;4, improving the waterproofing function of the system, and changing the rigidity of various kinds of polycrystalline mortar into softness, thereby improving the impact resistance, bending resistance,tensile strength, shrinkage resistance and other strain capacities of the insulation system; and 5. improving the bending resistance and the tensile strength of the material and the physical anti-cracking performance of the system.
Owner:HAIDA CONSTR GRP

Power battery cooling system based on core-cladding-structure composite phase-change heat storage layer

The invention discloses a power battery cooling system based on a core-cladding-structure composite phase-change heat storage layer. The power battery cooling system comprises a system shell, battery unit modules, heat storage modules, an upper cover plate and a lock screw, wherein the battery unit modules and the heat storage modules are distributed in the shell in a layered and staggered manner, and the upper cover plate and the lock screw are used for realizing assembling and positioning; each heat storage module wholly adopts a core-cladding structure and comprises an outer sealing shell and a composite phase-change material, the outer sealing shell is positioned at the outer layer of each module and made of a high polymer material, the inner chamber of the outer sealing shell is filled with the composite phase-change material in a vacuum manner, and the composite phase-change material is formed by mixing a heat conduction material and a paraffin type phase-change material; the curing temperature of the high polymer material is set to be higher than the phase change temperature of the composite phase-change material, and a certain vacuum clearance is retained in the inner chamber of the outer sealing shell made of the high polymer material for the composite phase-change material. According to the power battery cooling system, the heat storage modules which are convenient to operate and control and can circularly charge and discharge heat. Compared with the prior art, the power battery cooling system effectively solves the problems of difficult sealing and expansion pressure likely caused by the phase-change material.
Owner:HUAZHONG UNIV OF SCI & TECH

Cellulose-reinforced polyurethane/epoxy resin interpenetrating polymer network hard composite foam material and preparation method thereof

InactiveCN105348473AHigh compressive strengthGood sound absorptionInterpenetrating polymer networkIsocyanate compound
The invention discloses a cellulose-reinforced polyurethane/epoxy resin interpenetrating polymer network hard composite foam material and a preparation method thereof, relates to a foam material and a preparation method thereof and aims at solving the problems that existing polymer formed through mutual interpenetrating of two types of polymer, namely polyurethane and epoxy resin, is poor in sound absorption property and low in mechanical property. The sound absorption property of the composite foam material ranges from 80% to 92%, and the composite foam material is prepared from polyether polyol, isocyanate, water, a foaming agent, foam stabilizer, initiator, hydrosol of nano-crystalline cellulose with the mass percentage being 1%, chain extender, a cross-linking agent and epoxy resin. The preparation method comprises the steps of firstly, mixing the polyether polyol, the foam stabilizer, the initiator, the foaming agent, the chain extender and the water with cellulose obtained after pretreatment, then adding the epoxy resin and the cross-linking agent, and obtaining a mixture; then mixing the isocyanate with the mixture, conducting stirring till bubbles are generated, leaving the mixture standing still, obtaining a foamed mixture, finally, conducting curing on the foamed mixture at the room temperature, and then conducting curing at the high temperature.
Owner:NORTHEAST FORESTRY UNIVERSITY

Prestressed bridge surface connection device and prefabrication method and construction method thereof

The invention discloses a prestressed bridge connection device and a prefabrication method and construction method thereof. The prestressed bridge connection device includes a connecting plate main body formed by pouring ultra-high performance concrete, and is characterized in that the inside of the connecting plate main body is fixedly provided with at least one corrugated pipe in the longitudinal direction, the upper portion of the pipe wall of the corrugated pipe is provided with two through grouting holes, a prestressed reinforcing steel bar is inserted in the corrugated pipe, the length of the prestressed reinforcing steel bar is larger than that of the corrugated pipe, a fixing assembly for fixing the prestressed reinforcing steel bar is arranged between the prestressed reinforcing steel bar and the connecting plate main body, and the connecting plate main body is provided with a plurality of transverse connection reinforcing steel bars extending out of the two transverse ends of the connecting plate main body and a plurality of longitudinal connection reinforcing steel bars extending out of the two longitudinal ends of the connecting plate main body; the two transverse ends of the connecting plate main body are provided with post-pouring belts used for pouring the concrete. The prestressed ultra-high-performance concrete bridge connection device has the advantages of cracking prevention and crushing resistance, driving is thus stable and comfortable, and service life of a bridge surface continuous structure is prolonged.
Owner:NINGBO UNIV

Inorganic foam heat insulating material with second-grade closed-pore structure and preparation method thereof

The invention discloses an inorganic foam heat insulting material with a second-grade closed-pore structure. The inorganic foam heat insulating material is prepared by hollow balls (hollow microsphere), gel material, fibers, a foaming agent, a reinforcing agent, a water repellent and water based on the proportion by weight of (70 to100): (35 to 80): (0 to 5): (0.1 to 2.5): (0 to 12): (0 to 5): (76 to 154). The inorganic foam heat insulating material prepared by the materials mentioned above has a second-grade closed-pore structure, so that relatively high heat insulating performance is achieved; the inorganic foam heat insulating material has the dry apparent density of 100 to 500kg/m<3>, compressive strength of 0.2 to 3.0MPa, and thermal conductivity of 0.020 to 0.080W/(m.k), and has the characteristics of incombustibility, low density, good heat insulating performance, capacity of absorbing sound and reducing noise, and low comprehensive cost, is convenient to construct, and uses a large number of solid wastes. The inorganic foam heat insulating material can be widely applied to the fields of building heat insulation and industrial heat insulation, and also can be widely applied to preparing inorganic hollow ball foam products; and the inorganic foam heat insulating material has high value in actual application.
Owner:HEBEI YL BANGDA NEW MATERIALS LTD CO +1

Continuous fiber reinforced polyolefin composite tube and preparation technology thereof

The invention relates to a continuous fiber reinforced polyolefin composite tube and a preparation technology thereof. The continuous fiber reinforced polyolefin composite tube comprises an inner layer plastic tube; an internal heating glue-smelting layer is arranged outside the inner layer plastic tube; a continuous fiber impregnated tape is arranged outside the internal heating glue-smelting layer; an external heating glue-smelting layer is arranged outside the continuous fiber impregnated tape; an outer layer plastic tube is arranged outside the external heating glue-smelting layer. The preparation technology is that the inner layer plastic tube is coated with the internal heating glue-smelting layer, the continuous fiber impregnated tape is preheated and then wound on the inner layer plastic tube, and is coated with the external heating glue-smelting layer, and finally, the external heating glue-smelting layer is coated with the outer layer plastic tube to obtain the composite tube, and then the whole composite tube is heated to enable the mutual fusing and connection and fixation from the inner layer plastic tube, the internal heating glue-smelting layer, the continuous fiber impregnated tape, the external heating glue-smelting layer and the outer layer plastic tube, so as to obtain the continuous fiber reinforced polyolefin composite tube. The continuous fiber reinforced polyolefin composite tube and the preparation technology enhance the compression strength of the composite tube effectively, the crushed material of the composite tube can be directly recycled, the technology is simple, the cost is low, relatively long glass fibers in the crushed material are used as a reinforcing material, and the recycled material can be used as a high-strength reinforced modified material.
Owner:山东方大新材料科技有限公司 +1

Continuous extrusion deformation method of magnesium alloy

InactiveCN101912891AImprove industrial production efficiencyHigh compressive strengthContinuous flowCrystallite
The invention discloses a continuous extrusion deformation method of magnesium alloy, which comprises the steps that: the temperature of a homogenized magnesium alloy blank is heated to 350 to 450 DEG C, an extrusion die, with the temperature lower than that of the magnesium alloy blank by 10 to 30 DEG C, is used for performing first-pass one-way continuous extrusion at the constant-speed extrusion rate of 1m/min to 3m/min in an order of forward extrusion, change channel angular extrusion at 90-degree corner and equal channel angular extrusion at 90-degree corner, so that the magnesium alloy blank, after the forward extrusion at one end of the die, is equivalently divided into a plurality of streams, which are subject to the change channel angular extrusion and the equal channel angular extrusion to form the magnesium alloy at the other end of the die, followed by mold stripping, thus continuous flowing extrusion deformation is formed, the extrusion ratio of the forward extrusion to the change channel angular extrusion at 90-degree corner is 16:1, and the extrusion ratio of the change channel angular extrusion to the equal channel angular extrusion at 90-degree corner is 1:1. The method can not only obtain extremely prominent grain refining effect and more homogenous structure of the magnesium alloy, but can also enhance industrial production efficiency, lower production cost and ensure production quality by increasing the extrusion ratio and the extrusion speed.
Owner:CHONGQING UNIV

Low-temperature delayed-curing sand-control proppant, preparation method of proppant as well as low-temperature delayed-curing sand-control system

The invention discloses a low-temperature delayed-curing sand-control proppant, a preparation method of the proppant as well as a low-temperature delayed-curing sand-control system. The sand-control proppant comprises proppant particles, wherein proppant particles comprise quartz sand and composite resin layers, and the composite resin layers comprise inner resin layers and outer resin layers; the inner resin layers are thermoplastic phenolic resin layers; the outer resin layers comprise components in parts by weight as follows: 1.0-3.5 parts of mixed resin, 0.01-0.02 parts of a resin curing agent, 0.005-0.02 parts of a silane coupling agent and 0.05-0.1 parts of a dispersant; the mixed resin is a mixture of thermoplastic phenolic resin and epoxy resin; the mass ratio of the quartz sand to the inner resin layers to the mixed resin of the outer resin layers is 100:(0.5-2.0):(1.0-3.5). The temperature resistance and the compressive strength of the sand-control proppant are improved by the aid of the composite resin layer, and the sand-control proppant can be cured at the low temperature and even the normal temperature and can be adapted to stratums at different temperatures.
Owner:HENAN TIANXIANG NEW MATERIALS

High-performance assembling type construction reinforcing steel bar sleeve grouting material and using method thereof

The invention discloses a high-performance assembling type construction reinforcing steel bar sleeve grouting material and a using method thereof, and belongs to the technical field of building materials. The grouting material consists of the following components in parts by mass: 80 to 100 parts of cement, 0 to 80 parts of quartz sand, 10 to 100 parts of mountain sand or river sand, 5 to 15 partsof an expanding agent, 0 to 1 part of a set retarder, 0.5 to 3 parts of a water reducing agent, 0 to 1 part of a defoaming agent and 15 to 80 parts of steel slag powder. When the grouting material isused, the cement, the quartz sand and steel slag are uniformly mixed in proportion first, then 2 to 3 times of water is added slowly, the materials are stirred, the expanding agent, the set retarder,the water reducing agent and the defoaming agent are added in proportion in a stirring process, and after the materials are stirred uniformly into the grouting material, the grouting material can beused. According to the grouting material, the quartz sand is partially or completely replaced by adopting the river sand or the mountain sand, the using of complex admixtures is reduced, and industrial waste steel slag is added, so that the performance of the grouting material can be maintained, and meanwhile, the cost is greatly reduced; therefore, the grouting material is suitable to be widely applied in an assembling type construction reinforcing steel bar sleeve grouting material.
Owner:云南鼎安翔农业产业发展股份有限公司
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