62 results about "Syntactic foam" patented technology

The invention discloses a PPE composite foam material as well as a preparation method and application thereof, and belongs to the field of high polymer materials. The PPE composite foam material comprises a foam bead inner core and a conductive shell layer, electromagnetic shielding filler of the foam bead inner core is mainly distributed in a foam hole wall area, and a first electromagnetic isolation network structure in the foam bead inner core is formed; the conductive shell layer is arranged between the inner cores of the foam beads to construct a second electromagnetic isolation network structure; meanwhile, the conductive paths in the core-shell are connected and synergistically improve the conductivity and the electromagnetic shielding performance, under the synergistic effect of the core-shell structure, even if the content of the electromagnetic shielding filler in the inner core of the foam bead is low, the PPE composite foam material can obtain excellent conductivity and electromagnetic shielding performance, foaming is facilitated, and the foaming ratio is increased.

A composite wall includes a foam layer and a concrete layer. The wall includes at least one wall continuous load path structure within the concrete layer and extending from a bottom edge to a proximate a top edge of the wall. The at least one continuous wall load path includes a bottom bracket configured to be secured to a mount in a foundation, a lifting member proximate a top surface of the wall, wherein the concrete layer includes a cavity that exposes an aperture in the lift mechanism, such that the lifting member can be engaged to tilt the wall into an upright position, and a joining member configured to connect the bottom bracket to the lifting member.

The application belongs to the technical field of novel energy storage materials, and particularly relates to a high-performance electrochemical energy storage composite material and a preparation method and application thereof. The preparation method comprises the following steps: adding spherical copper powder into a chemical plating solution to prepare copper-coated nickel powder; mixing the copper-coated nickel powder, lanthanum selenium oxide powder and calcium chloride powder, and obtaining a composite foam metal substrate after cold pressing, sintering and boiling water immersion; adding onion carbon into a nitric acid solution for ultrasonic dispersion, then adding a silane coupling agent for microwave reaction, and obtaining modified onion carbon after filtration and drying; adding the modified onion carbon, cobalt nitrate and iron nitrate into water and uniformly mixing, adjusting the pH to 9-11, placing the composite foam metal substrate into the solution, and obtaining the electrochemical energy storage composite material after heating reaction and treatment. The electrochemical energy storage composite material prepared by the application has stable structure, excellent corrosion resistance and oxidation resistance, can be directly used as a working electrode of a supercapacitor, and can effectively improve the specific capacity and cycle stability of the supercapacitor.

The invention discloses a strain rate sensitive composite foam material and a preparation method thereof, and relates to the technical field of high polymer materials, and the preparation method comprises the following steps: mixing hydroxyl-terminated polydimethylsiloxane, thermoplastic polyurethane powder, a microsphere foaming agent, boric acid and a derivative thereof, and foaming in a temperature range of 65-120 DEG C to obtain the strain rate sensitive composite foam material, the mass ratio of the hydroxyl-terminated polydimethylsiloxane to the thermoplastic polyurethane powder is within the range of 1: (1-10); the addition amount of the microsphere foaming agent is 0.02-15wt% of the total mass of the foaming powder; the molar weight of the boric acid and the derivative thereof is 1-10 times of the molar weight of the hydroxyl-terminated polydimethylsiloxane; the strain rate sensitive composite foam material prepared by the invention has good size and structural stability, good strain rate effect and impact energy absorption effect, and the preparation method is simple.

This invention discloses an article comprising a substrate having a first portion comprising at least one of a metal or a ceramic metal oxide. A composite foam is bonded to the metal or ceramic metal oxide. The composite foam comprises: at least one polymer capable of being prepared by ring-opening metathesis polymerization; at least one catalyst for ring-opening metathesis polymerization; at least one bifunctional coupling agent represented by Z-X-Z. Each Z independently represents a group that chemically reacts with at least one of the chemically bonded surface hydroxyl groups to form at least one covalent bond. Each X independently represents a divalent organic linker group with a number average molecular weight of 500 g / mol to 10000 g / mol. And at least one of hollow glass microspheres or expanded polymer microspheres. This invention also discloses a method for preparing the article.

Described herein are syntactic foams comprising: (i) hollow filler particles; and (ii) an epoxy matrix; wherein, the epoxy matrix is characterized by an ordered microstructure comprising a plurality of vacancies that resides at interstices between the filler particles. The ordered microstructure of the syntactic foams provides the materials with lower densities and higher strengths compared with syntactic foams of the art. Methods of preparing the syntactic foams are additionally described.

A syntactic lightweight foam made of low density spheres embedded in a resin.SOLUTION: Disclosed herein are syntactic foam components and methods of making syntactic foam components. The method includes loading micro-sized low density spheres into a mold that includes a macro tolerance region and a macro restriction region. The method also includes loading macro-sized low density spheres into the mold. Thereby, the macro-sized low density spheres are surrounded by the micro-sized low density spheres and each one is spaced apart from any other one of the macro-sized low density spheres. All of the macro-sized low density spheres are completely within the macro-tolerance area of the mold. The method introduces a resin into the mold to fill the mold and embed the micro-sized low density spheres and the macro-sized low density spheres, and solidifies the resin after the resin fills the mold.SELECTED DRAWING: Figure 5A

The invention relates to a composite foam component and an associated method of making the same. A method of manufacturing a composite foam component includes disposing at least one thermally conductive medium layer within a mold such that at least a portion of the at least one thermally conductive medium layer is spaced from an inner surface of the mold. The method further includes loading a low density sphere into a mold such that it surrounds the at least one thermally conductive medium layer. The method further includes introducing a resin into the mold such that the at least one thermally conductive layer and the low density spheres are embedded within the resin. The thermal conductivity of the at least one thermally conductive medium layer is greater than the thermal conductivity of the low-density spheres and the resin. The method further includes consolidating the resin after introducing the resin into the mold. The method further includes transferring heat through the at least one thermally conductive medium layer while the resin is consolidated.

The application discloses a foam sandwich structure with broadband electromagnetic wave absorption and lattice mechanics enhancement, belongs to the technical field of electromagnetic wave absorbing materials, and comprises, from top to bottom, a wave-transparent panel, a resistive film composite foam core material and an electromagnetic wave reflecting back plate; the resistive film composite foam core material is wrapped with orthogonal lattice webs around; the resistive film composite foam core material comprises a plurality of resistive film composite foam core layers; each resistive film composite foam core layer comprises a foam layer and a resistive film piece which is combined on the foam layer; the resistive film piece comprises a wave-transparent composite material piece and a resistive film layer; and the resistive film layer is printed on the wave-transparent composite material piece. The glass fiber reinforced resin-based composite material is used as the panel layer and the bidirectional lattice web, the basic mechanics performance of the structure is ensured, the resistive films with different square resistance values are combined in the foam core material, and the broadband electromagnetic wave absorption performance is achieved.

The application provides a recycled aluminum ash hollow sphere / aluminum matrix composite foam material and a preparation method thereof, and belongs to the technical field of aluminum industrial solid waste resource recycling and metal material processing. The aluminum matrix is used instead of the resin matrix to prepare the composite foam material, and the aluminum ash is used as the hollow sphere raw material, so that the strength and specific energy absorption of the composite foam material can be significantly improved; after the metal aluminum is extracted, the hollow aluminum oxide particle content in the aluminum ash is relatively high, compared with the aluminum matrix, the hollow particle has a relatively low density, and after the aluminum ash hollow sphere is combined with the aluminum matrix, a light product can be manufactured; the obtained recycled aluminum ash hollow sphere / aluminum matrix composite foam material has the performance advantages of low density, high specific stiffness, high energy absorption capacity, excellent mechanical and acoustic damping performance and the like, and has a wide application prospect in the fields of aerospace, transportation, national defense and building.

The invention discloses a high-performance porous polymer / silicon dioxide aerogel composite foam material and a preparation method thereof. The preparation method comprises the following steps: blending and molding a polymer and PEO to obtain a composite sheet; preparing sol from a silicon source and ethanol; the composite sheet is completely soaked in the sol until a large number of pores appear inside and outside the composite sheet, and the sol is in a completely transparent state; and transferring into a closed container, standing for aging, then immersing into a mixed solution of normal hexane and a hydrophobic modifier for aging to obtain a hydrophobized composite sheet, and then foaming in a foaming kettle to obtain the composite foam material. The invention has the following beneficial effects: the characteristics of light weight and low thermal conductivity of the material are ensured, the flexibility and strength of the material are significantly improved, and the pulverization resistance, damp heat resistance and dimensional stability are better; and meanwhile, the process is simplified, the cost is reduced, large-scale production is easy, and key performance can be regulated as required.

The application provides a hollow sphere reinforced metal matrix composite foam material finite element model modeling method, and belongs to the technical field of finite element modeling. In view of the random distribution characteristics of the hollow sphere reinforced composite foam material, a random geometric model of the hollow sphere in a specified space is generated through a random gravity accumulation algorithm; Gaussian distribution particle size data is generated based on a random variable algorithm of Box-Muller conversion; interference between the hollow spheres is eliminated in combination with an intrusion discrimination algorithm, so that a non-interference geometric model is generated; finally, finite element mesh division, material property definition and load condition loading are performed, and an accurate finite element model is constructed. The application not only can restore the structure of the composite foam material, but also can improve the prediction accuracy of the mechanical properties, thereby providing technical support for the design and optimization of the hollow sphere reinforced metal matrix composite foam material.

The application discloses a kind of foam-based flexible tactile sensor and its preparation method, the flexible tactile sensor has three-layer structure, middle layer is PEDOT:pss / rGO composite foam, the composite foam is tactile sensing material, and the upper and lower layers are both flexible PDMS film;The application uses simple and efficient hydrothermal synthesis method and subsequent flash instantaneous irradiation reduction method, and prepares a kind of three-dimensional porous PEDOT:pss / rGO composite foam, can effectively and maximumly keep the composite skeleton structure of original PEDOT:pss / GO foam, and makes PEDOT:pss polymer polymer and rGO sheet closely connected, so that PEDOT:pss / rGO composite foam has better mechanical elasticity and high conductivity, so that flexible tactile sensor has high sensitivity, ultra-low detection lower limit, short response time and good stability and other excellent performance, widely used in human health, motion monitoring and other fields.

To provide a lightweight foam, particularly a syntactic foam component having an elongated member.SOLUTION: Examples of the present disclosure include an apparatus including a syntactic foam component. The syntactic foam component includes low density spheres at least partially embedded in a resin. The syntactic foam component includes an elongate member partially embedded in the resin and including a first end and a second end. At least the first end is disposed against the syntactic foam component. The first end is thereby exposed to the exterior of the syntactic foam component at the outer surface of the syntactic foam component.SELECTED DRAWING: Figure 5B

The invention relates to a composite foam component with elongate members. Examples of the present disclosure include an apparatus including a composite foam component. The composite foam component includes low density spheres at least partially embedded in a resin. The composite foam component includes an elongate member partially embedded in a resin and including a first end and a second end. At least the first end is positioned relative to the composite foam component such that the first end is exposed to an exterior of the composite foam component at an exterior surface of the composite foam component.

The application provides a functional fiber-based composite foam material and a preparation method thereof, and belongs to the technical field of inorganic fiber composite materials. The preparation method comprises the following steps: providing a basalt fiber-based foam base; providing an impregnating solution in the form of a solution and containing monolayer MXene nanosheets; contacting the basalt fiber-based foam base with the impregnating solution containing monolayer MXene nanosheets, so that the basalt fiber-based foam base is impregnated with the impregnating solution containing monolayer MXene nanosheets; and drying the obtained composite foam loaded with MXene nanosheets, to obtain the functional fiber-based composite foam material with a density of 9-15 mg / cm 3 The method is prepared at low temperature and has low energy consumption. A layered rigid framework composed of flexible fiber chains and rigid sheet-shaped MXene is constructed. The prepared composite foam material has the characteristics of good mechanical properties, low density, compressibility and resilience, excellent sound absorption and heat insulation performance, and high specific shielding effectiveness.

The application discloses a graphene nanocomposite foam material electromagnetic shielding multi-objective optimization model and application thereof. The model combines a graphene nanocomposite foam material electromagnetic constitutive model and a non-dominated sorting genetic algorithm, carries out multi-objective optimization calculation on high electromagnetic shielding efficiency and low cost, mainly considers the interactive influence of microstructure parameters such as a graphene mass fraction, material porosity and sample thickness on the electromagnetic shielding efficiency and cost, and optimizes the microstructure parameters to improve the electromagnetic shielding efficiency of the material and reduce the cost. The model can be applied to determining the minimum parameter of graphene in the graphene nanocomposite foam material, and has guiding significance for microstructure parameter design of a high-efficiency electromagnetic shielding device.

The application discloses fly ash and cement based aggregate-free high-strength concrete and a preparation method thereof, and belongs to the technical field of building materials. The concrete is made of the following raw materials in parts by mass: 50-70 parts of 42.5 grade and above Portland cement, 15-25 parts of fly ash, 15-25 parts of silica ash, 0.5-3.0 parts of high-performance composite foaming agent, and the total water-binder ratio is 0.25-0.40. The preparation method comprises the following steps: uniformly dry mixing the cementitious material and admixture, then adding water and stirring to form a slurry; uniformly mixing stable foam prepared by physically foaming the foaming agent into the slurry; and pouring and performing combined curing of standard curing and steam curing. The application controls the dry density of the concrete at 800-1600 kg / m3, and the 28-day compressive strength is stabilized at more than 10 MPa under the condition of no traditional sand aggregate, by optimizing the ratio of the ternary cementitious system of cement-fly ash-silica ash, using high-performance foam stabilizer and strictly controlling the low water-binder ratio, so that the problems of low strength and poor durability of the existing aggregate-free concrete are solved.

The invention discloses composite foam as well as a preparation method and application thereof. The structure of the composite foam comprises a metal material which is selected from a metal simple substance or a metal alloy; the hollow glass microspheres and the reinforcing filler are dispersed in the metal material; wherein all the hollow glass microspheres are embedded in the metal material. In the composite foam, a composite cavity is formed by using the preformed hollow glass microspheres and stacking gaps among the microspheres, so that the density of the composite foam is reduced, and the strength and functionality of the composite foam are also ensured; connection enhancement of the preformed hollow microspheres is synchronously achieved through the metal material deposition process, and the process is convenient and efficient through connection of the reinforcing filler and the hollow microspheres.

A radome structure may include a first syntactic foam layer, a multilayer tuning component overlying the first syntactic foam layer, a structural laminate core overlying and in contact with the multilayer tuning component, and a second syntactic foam layer overlying the structural laminate core. The multilayer tuning component may include a first tuning sublayer, and a second tuning sublayer overlying the first tuning sublayer. The first tuning sublayer may have a dielectric constant (Dk1) of at least about 1 and not greater than about 3. The second tuning sublayer may have a dielectric constant (Dk2) of at least about 1 and not greater than about 3.

A method of making a syntactic-foam part includes positioning at least one thermally-conductive media layer within a mold such that at least a portion of the at least one thermally-conductive media layer is spaced apart from an interior surface of the mold. The method also includes loading low-density spheres into the mold so they surround the at least one thermally-conductive media layer. The method further includes introducing a resin into the mold so that the at least one thermally-conductive layer and the low-density spheres are embedded within the resin. The at least one thermally-conductive media layer has a thermal conductivity that is greater than a thermal conductivity of the low-density spheres and the resin. The method additionally includes solidifying the resin after the resin is introduced into the mold. The method also includes transferring heat through the at least one thermally-conductive media layer when the resin is being solidified.

The utility model belongs to nursing appliance technical field, concretely relates to a kind of composite foam dressing paste, including base layer, the base layer surface is equipped with through slot, the base layer surface is located the fixed connection of through slot one side non-woven fabric, the non-woven fabric lower surface is provided with dressing replacement layer, and the dressing replacement layer corresponds with through slot. The dressing replacement layer includes multiple bearing layers, the lower surface of bearing layer is fixedly connected with foam layer, multiple bearing layers are stacked distribution, and the upper surface of bearing layer is provided with release agent. The utility model can conveniently replace dressing position, reduce use cost, and also reduce the discomfort of patient caused by frequent replacement of dressing paste.

The invention relates to the technical field of polymer composite materials, in particular to an aramid composite foam material and a preparation method thereof, and the aramid composite foam material comprises the following raw materials: 0.5-1 part of meta-aramid chopped fiber; 0.2 to 0.5 part of a meta-aramid precipitation product; 0.05 to 0.2 part of thermal expansion microspheres; 2-10 parts of a water-based adhesive; 0.5 to 1 part of a surfactant; 15 to 50 parts of deionized water; the preparation method of the meta-position aramid precipitation product comprises the following steps: carrying out polymerization reaction on m-phenylenediamine and isophthaloyl dichloride in a polar solvent to obtain a meta-position stock solution, fully dispersing the meta-position stock solution in water, and carrying out solid-liquid separation to obtain the meta-position aramid precipitation product. The aramid fiber composite foam material has the properties of uniform structure, low density, high strength, temperature resistance and flame retardance, and the preparation method is green and efficient.

To provide a buoyant material having high hydrostatic pressure breaking strength and relatively low density.SOLUTION: The syntactic foam (102) includes a matrix (150), a quantity of cellular polymeric beads (200) disposed within the matrix (150), each of the cellular polymeric beads (200) having a breadth of less than 1.1 5mm, and a quantity of hollow microspheres dispersed within the matrix (150) and between the quantity of cellular polymeric beads (212). The largest of the hollow microspheres (300) is no more than 1 / 7 of the smallest of the porous polymeric beads (200), and the hollow microspheres (300) have a size distribution within ± 10 μm.SELECTED DRAWING: Figure 3

The invention provides an environment-friendly PBAT / PVA composite material with high mechanical property and antibacterial property and a preparation method thereof.The preparation method comprises the steps that firstly, magnesium oxide particles are modified based on CTAB to obtain modified magnesium oxide particles, then the modified magnesium oxide particles serve as filler to be blended with modified polyvinyl alcohol and PBAT, and the environment-friendly PBAT / PVA composite material is obtained. The raw materials are processed by an internal mixer and a press vulcanizer to prepare a plate, or mixed and granulated by a single screw extruder to prepare granules, or further foamed by the plate to prepare a foam material. Specific modified magnesium oxide particles are added as a filler, so that the mechanical property of the composite material is further improved, the composite material is endowed with antibacterial property, and the absorptive property of the composite material in a natural soil environment is effectively enhanced; in addition, the addition of the modified magnesium oxide particles is beneficial to the regulation and control of the foam structure of the composite foam material, and a new strategy is provided for the application and popularization of the PBAT / PVA composite material.

The invention belongs to the technical field of new materials, and particularly relates to a high-bearing and high-sensitivity polyurethane / soybean protein isolate composite foam flexible strain sensor and a preparation method thereof. High-bearing foam with a special pore structure is prepared from a polyurethane prepolymer and a polyvinyl alcohol aqueous solution, low-cost soybean protein isolate is dispersed in pores of polyurethane foam, and a conduction path with high sensitivity response under strain is constructed through a hydrogen bond network formed by the polyurethane foam and polyvinyl alcohol; the mechanical property of the composite foam is improved, so that the material has excellent mechanical property while obtaining unique negative pressure resistance characteristic. The preparation method has the characteristics of simple operation, easily available raw materials, environmental protection and the like, and the prepared sensor has good stability, high sensitivity and high bearing capacity.

The invention belongs to the technical field of new energy automobile parts and polymer composites, and particularly relates to sound-insulation and heat-insulation foam for a new energy automobile and a production process of the sound-insulation and heat-insulation foam. The process comprises the following steps: by taking bamboo fibers as raw materials, firstly, carrying out controllable open fire roasting pretreatment on the bamboo fibers to pre-stabilize and activate the surfaces of the fibers; gradient procedure carbonization is carried out in an inert atmosphere, and fibrous carbonized bamboo fibers with natural hierarchical pore structures are prepared; and then blending the fiber with a polyolefin base material, a compatilizer, a foaming agent and a halogen-free flame retardant, extruding and granulating, and carrying out mould pressing foaming molding to prepare the composite foam material. The bamboo fibers are converted into the functional carbon fibers with a three-dimensional reinforced framework and a multi-stage hole sound absorption and heat insulation unit through cooperation of fire baking and carbonization processes. The invention realizes the spanning from renewable bamboo wood to a high-performance automobile engineering material, and is suitable for key parts such as a new energy automobile battery pack heat insulation pad, a motor cabin sound insulation cover and the like.

The invention relates to a method for smelting high-quality steel through a low-carbon-emission electric furnace, and belongs to the technical field of electric furnace steelmaking. The method comprises the steps that in the electric furnace smelting process, a first batch of low-carbon foam slag is added into an electric furnace; a low-carbon composite foaming agent is sprayed into the electric furnace after the first batch of low-carbon foam slag is added, the spraying position is a preset area around the end of the electrode, and the area is completely covered within preset time to form a foaming agent layer with the preset thickness; when the melting amount of the scrap steel in the furnace reaches a preset threshold value, the range of the sprayed low-carbon composite foaming agent is expanded to cover the whole surface of the molten pool; and the second batch of low-carbon foam slag and the third batch of low-carbon foam slag are sequentially added into the electric furnace into which the low-carbon composite foaming agent is sprayed until smelting is finished. The low-carbon composite foaming agent and the low-carbon composite foaming slag are used in the electric furnace smelting process, so that the environment-friendly target of extremely low carbon emission is achieved while high-end and high-quality steel production is realized.

The invention discloses calcium sulfate whisker-modified graphene oxide composite foam concrete which is prepared from the following raw materials in parts by weight: 40-50 parts of cement, 4-10 parts of fly ash, 20-28 parts of water, 2-6 parts of water glass modified graphene oxide, 1-6 parts of calcium sulfate whiskers, 2-5 parts of a foaming agent and 1-4 parts of a polycarboxylate superplasticizer. The method comprises the following steps: uniformly mixing cement and fly ash to form a dry mixture; uniformly mixing and stirring water, a polycarboxylate superplasticizer, water glass modified graphene oxide and the dry blend, then adding calcium sulfate whiskers, and stirring to form composite slurry; preparing a foaming agent into stable foam, and introducing the stable foam into the composite slurry at a constant speed to obtain a foam concrete mixture; and injecting the mixture into a mold, standing, condensing and curing to obtain the foam concrete. A multi-scale composite reinforcing system based on the water glass modified graphene oxide and the calcium sulfate whiskers is introduced into the foam concrete, a stable reinforcing network from the nanometer level to the micrometer level is constructed, and the comprehensive performance of the foam concrete is improved.

A method of making a syntactic-foam part includes loading low-density spheres into a mold. The method also includes introducing a first resin into the mold. The method further includes coating the low-density spheres with the first resin to form a coating, made of the first resin, around an entirety of each one of the low-density spheres. The method additionally includes solidifying the first resin after the first resin is coated on the low-density spheres. The method also includes solidifying the second resin after the second resin fills the mold.