20results about How to "Good compression resilience" patented technology

The present invention relates to a compressible and resilient chitosan / carbon black composite material, and a preparation method and application thereof. A compressible and resilient chitosan / carbon black composite material with a hierarchical structure having both rigidity and flexibility is prepared by an alkali replacement method assisted by an ice template. A three-dimensional porous chitosan / carbon black composite material is constructed by combining the hydrogen bonding within and between chitosan molecules using an ice template, thereby solving the problems of traditional chitosan hydrogels being easily broken, having low toughness, and having poor mechanical properties under high stress and strain. The chitosan / carbon black composite material has good compression and rebound effects under high stress and strain, and is used for evaporation and desalination of high-concentration brine. It can operate stably in high-concentration brine and has good salt resistance.

The utility model discloses an engineering seat anti-skid wear-resistant seat surface material, which comprises an anti-skid layer, an enhancement layer, a shock absorption layer and an absorption layer, the upper surface of the anti-skid layer is provided with a bionic shark layer structure, the shock absorption layer is internally provided with a plurality of elastic pieces, the shock absorption layer is internally filled with magnetorheological fluid, the absorption layer is internally provided with a silica gel honeycomb block, and the silica gel honeycomb block is filled with a plurality of elastic pieces. A reinforcing band is arranged in the absorbing layer, and the reinforcing band is filled with polyurethane foam. According to the device, the stability of the static friction coefficient is improved by arranging the bionic shark layer structure, the surface is durable and wear-resistant, scratches and fuzzing are reduced, and by means of hexagonal elastic deformation when the silica gel honeycomb block is pressed, the viscosity of magnetorheological fluid, damping vibration of polyurethane foam in the reinforcing band through a closed-cell structure, elastic deformation of an elastic piece and deformation of an air capsule, the stability of the static friction coefficient is improved. A multi-stage damping mechanism is formed to absorb vibration, local pressure can be dispersed to the whole absorption layer, and the excellent compression resilience performance is achieved.

According to the high-entropy heat-insulation aerogel material and the preparation method thereof, oxygen-containing functional groups on the surface of graphene oxide serve as multi-component metal ion chelation sites, a graphene aerogel three-dimensional network serves as a framework, and the high-entropy heat-insulation aerogel material is prepared by combining the induction effect of a two-dimensional graphene sheet on a layered structure of high-entropy metal crystal growth. And preparing the high-entropy aerogel material with a continuous network, wherein two-dimensional layered high-entropy metal oxide crystals are lapped in pore walls of the high-entropy aerogel material. The high-entropy aerogel prepared by the scheme has low thermal conductivity and low density, has good compression elasticity in room-temperature and high-temperature air environments, has heat insulation performance remarkably superior to that of a corresponding single-component oxide aerogel material, and has a very good application prospect in the fields of heat preservation, heat insulation and high-temperature-resistant thermal protection.

The invention relates to the technical field of micro-nano fiber material preparation, and discloses a high-elastic crimped micro-nano fiber sponge and a preparation method thereof.The preparation method comprises the steps that an asymmetric airflow shearing field is constructed by adjusting an eccentric coaxial spray head, spinning solution jet flow is induced to generate high-frequency spiral whipping, and micro crimped fibers are formed; meanwhile, pulse hot airflow generated by an air cushion receiving table is used for carrying out suspension lifting, in-situ heat setting and vertical disturbance on deposited fibers, and an isotropic three-dimensional porous network with a Z-axis physical interlocking structure is constructed. The volume density of the prepared sponge is only 3-30 kg / m < 3 >, the porosity is as high as 90%-99%, the rebound rate is kept at 95% or above after 1000 times of cyclic compression under 60% strain, the problems that a compact film is easily formed, the interlayer binding force is weak and the fatigue resistance is poor in a traditional spinning technology are effectively solved, and the sponge has the advantages of being simple in process equipment, wide in raw material adaptability and the like.

The present invention discloses a new energy electric car sound insulation material and its production process, and relates to the technical field of sound insulation materials. The production process of the sound insulation material of the present invention comprises the following steps: after adding butyl rubber to a rubber mixer and rolling it, adding stearic acid and zinc oxide for mixing, adding cross-linked silicone rubber for mixing evenly, adding diisopropyl peroxide, thinning out a sheet, vulcanizing and molding, and obtaining modified silicone rubber; after mixing the modified silicone rubber and benzoyl peroxide, a mixed component is obtained; plasticizing acrylonitrile-butadiene-styrene copolymer and rolling it, adding the mixed component for mixing, and obtaining a masterbatch; mixing the masterbatch and acrylonitrile-butadiene-styrene copolymer evenly, melt-extruding, granulating, and drying, and obtaining a sound insulation material. The present application adds modified silicone rubber to the sound insulation material, giving the sound insulation material excellent barrier effects in both medium and high frequency noise and low frequency noise.

The application discloses a composite aerogel and a preparation method and application thereof, and belongs to the technical field of functional materials and environmental treatment. In the application, delignified cotton stalk cellulose is compounded with MXene to prepare a suspension, directional freezing self-assembly is carried out by using n-heptane as a heat transfer medium, and after freezing drying and polydimethylsiloxane dip coating, a PDMS / CMNF / MXene composite aerogel is obtained. The aerogel has an ultra-fine scale, high-density vertically arranged pore channels and a multi-level pore structure, and the pore channel diameter is 20-40 mu m. Under the driving of solar energy, the surface temperature of the aerogel can reach above 120 DEG C, the rapid in-situ viscosity reduction and efficient adsorption of high-viscosity crude oil are realized, the adsorption capacity is more than 56 times of the weight of the aerogel, and the performance retention rate is greater than 90% after 10 cycles. The application provides an efficient, green and recyclable solution for the treatment of marine high-viscosity crude oil leakage.

The utility model relates to the technical field of bearings, and discloses a bearing sealing check ring which comprises a sealing ring body, a plurality of clamping pieces are fixedly connected to the inner side of the upper face of the sealing ring body, a groove is formed in the upper face of the sealing ring body, and a reinforcing assembly is arranged in the groove and comprises a metal layer. The sealing check ring comprises a metal layer, a lower heat insulation layer is arranged below the metal layer, a lower sealing layer is arranged below the lower heat insulation layer, an upper heat insulation layer is arranged above the metal layer, and an upper sealing layer is arranged above the upper heat insulation layer. The sealing check ring is prevented from deforming, the heat insulation performance of the sealing check ring in use is improved under the action of the lower heat insulation layer and the upper heat insulation layer, and the sealing performance of the sealing check ring is improved under the action of the lower sealing layer and the upper sealing layer.

The utility model discloses a kind of high sealing observation windows of cremator, including two I-beam reinforcing plates, the upper and lower ends of two I-beam reinforcing plates are clamped with reinforcing plate, the reinforcing plate is connected by locking mechanism and I-beam reinforcing plate, glass body is installed between two I-beam reinforcing plates and two reinforcing plates, the periphery of glass body is clamped with sealing strip, glass body is composed of nano coating toughened glass, low emissivity film and quartz glass, the sealing strip is sequentially composed of first foamed silica gel layer, ceramic fiber matrix, aerogel layer and second foamed silica gel layer from inside to outside. The utility model can effectively prevent carbonization or cracking of sealing material under high temperature, while composite sealing structure significantly improves sealing performance and durability, in addition, three-layer structure synergistic effect, comprehensively improve the visibility, security and functionality of observation window, realize multifunctional protection.

The invention relates to a manufacturing method of a fibrofelt for automatic prime coat equipment and the fibrofelt, and the manufacturing method of the fibrofelt comprises the following steps: 1, opening and disorderly carding chemical fiber short fibers A with the diameter of 19-25 microns to form a thin fiber web B with the weight of 20-40 g / m < 2 >; secondly, the multiple layers of thin fiber webs B are laid in parallel and subjected to needling reinforcement, and fiber webs are obtained; thirdly, the fiber web is laid to obtain a multi-layer fiber web, then the multi-layer fiber web is reinforced, and a fiber felt block with the volume density being 0.2-0.3 g / cm < 3 > is obtained; and 4, according to the requirements of automatic prime coat equipment, carrying out module processing on the fibrofelt blocks to obtain the fibrofelt with a specific shape and specification. Therefore, the fibrofelt manufactured by the design has better porosity and better uniformity of coating thickness and width.

The invention discloses a silicone rubber foam material and a preparation method and application thereof.The silicone rubber foam material comprises a rubber A and a rubber B. The mass ratio of the rubber A to the rubber B is 1: (0.9-1.1), both the rubber A and the rubber B contain modified base rubber and an activating agent, and the modified base rubber is prepared from, by weight, 1-2 parts of a foaming agent, 1-2 parts of a foaming agent and 1-2 parts of a foaming agent. Comprising the following components in parts by weight: 68-72 parts of vinyl silicone oil, 3-6 parts of diphenyl silanediol, 28-32 parts of silicon dioxide and 0.5-0.8 part of a coupling agent. The silicone rubber foam material disclosed by the invention has high waterproof performance while realizing uniform foam holes and high rebound resilience.

The utility model provides a battery elastic piece device, which comprises an enclosure frame, a battery elastic piece and a battery elastic piece, wherein the enclosure frame is of a concentric-square-shaped frame structure; the elastic piece is of a wave-shaped structure, and the side edge of the elastic piece is fixed to the inner side wall of the enclosure frame; the supporting plates are fixed on the upper surface and the lower surface of the elastic sheet; according to the utility model, the elastic sheet structure is used for replacing foam in the module and serves as a buffer material in the middle of the battery cell, and the battery cell is always in a stable high-pretightening-force state in the circulation process by utilizing the advantages that the metal material is not easy to deform and the elastic sheet is good in compression resilience; the problem of insufficient pre-tightening force of the battery cell in the middle and later periods is solved, the performance of the battery cell is fully exerted, and the cycle life is prolonged.

The present invention discloses a bionic thermal insulation, noise reduction and fireproofing integrated nanofiber aerogel and a preparation method thereof, and belongs to the technical field of fiber aerogel. The preparation method of the bionic thermal insulation, noise reduction and fireproofing integrated nanofiber aerogel of the present invention comprises the following steps: mixing silica sol and water to obtain a premixed liquid, then adding a hydrophilic colloid and SiO2 nanofibers, mixing evenly, and obtaining a suspension; performing directional freezing on the suspension, and then vacuum drying and sintering to obtain the bionic thermal insulation, noise reduction and fireproofing integrated nanofiber aerogel. The present invention utilizes the property that hydrophilic colloids can gel with the change of temperature, and can quickly solidify to form a high-strength gel during the directional freezing process to solidify the fiber matrix and the infrared sunscreen reinforcing phase, and then removes ice crystals and hydrophilic colloids through freeze drying and high-temperature sintering, thereby solving the sedimentation problem of high-density reactants during the freezing process.

This application discloses a special graphite plate for fuel cells and its preparation process, relating to the field of fuel cell technology. The raw materials, by weight, include 78-82 parts pre-expanded graphite, 2-3 parts carbon black, 6-8 parts graphene-modified mesophase carbon microspheres, 1.5-2.5 parts silicon carbide whiskers, 4-6 parts borosilicate-modified phenolic resin, 0.3-0.5 parts silane coupling agent, and 20-30 parts anhydrous ethanol. The pre-expanded graphite, carbon black, graphene-modified mesophase carbon microspheres, and silicon carbide whiskers are added to a high-speed mixer for dry mixing. Then, borosilicate-modified phenolic resin and silane coupling agent are added, and high-speed shear mixing continues. Anhydrous ethanol is added, and after mixing, the materials are dried and crushed into powder. The obtained powder is placed in a mold and pressed into shape. The sample is then cured by stepped heating and pressing, and after cooling, the special graphite plate for fuel cells is obtained. The graphite plate provided by this application has excellent surface conductivity and mechanical strength.

The present invention discloses a graphene thermally conductive gasket and a preparation method thereof, wherein the thermally conductive gasket comprises graphene composite films stacked along the thickness direction, wherein the graphene composite films are bonded and stacked by adhesive; the graphene composite film comprises an adhesive tape and a graphene thermally conductive film bonded to the surface of the adhesive tape. Since the graphene composite film has good flexibility and thermal conductivity, and the graphene thermally conductive film on the surface of the adhesive tape is relatively thin, the adhesive is easy to penetrate and infiltrate, thereby enhancing the bonding force between the graphene layers. Therefore, the thermally conductive gasket obtained by cutting along the thickness direction is not prone to cracking caused by graphene delamination, and the elasticity enhanced by the adhesive tape substrate and the adhesive is obtained.

The embodiment of the invention provides a multi-layer material, an abrasive material used by the multi-layer material and application, the abrasive material is a foamed sheet of a polyester elastomer, and the loss factor of the abrasive material at any temperature within the range of 25-85 DEG C is smaller than 0.1. When the polyester elastomer is used for the grinding material, the multilayer material adopting the grinding material can be ensured to have a very good elastic recovery rate, and the planarization rate of a base material is stable.

This application relates to the textile field, specifically disclosing a thermal insulation fabric and its production method. The thermal insulation fabric comprises, from the outside in, a PTFE garment film, an adhesive layer, a polyethersulfone / polyurethane mixed fiber wadding, a hollow PBT core-sheath composite fiber layer, an adhesive layer, and a polyurethane / zirconia aerogel composite fiber layer. The polyurethane / zirconia aerogel composite fiber layer is woven from polyurethane / zirconia aerogel composite fibers, which have a core-sheath structure. It is prepared by coaxial wet spinning of the sheath solution and the core solution, followed by impregnation in a tert-butanol aqueous solution, pre-freezing, and freeze-drying. The sheath solution is a polyurethane solution, and the core solution is a polyurethane solution containing zirconia aerogel powder, with a mass ratio of zirconia aerogel powder to polyurethane of 0.2-0.3:1. The thermal insulation fabric of this application has the advantages of good thermal insulation effect, high mechanical strength, high compression resilience, and relatively fluffy texture.

The invention discloses a buffer flame retardant cross-linked polypropylene foam material for lithium battery pack and a preparation method thereof, which comprises the following raw material components in weight percentage: 5-25wt% foaming masterbatch, the particle size of the foaming masterbatch is 2-25μm; 6-12wt% flame retardant masterbatch; 0.3-2wt% antioxidant masterbatch; 0.3-2wt% compatibilizer masterbatch; 0.3-2wt% molecular weight regulator masterbatch; 60-80wt% polypropylene rubber masterbatch. After the masterbatch is mixed in proportion, it can form a network structure through extrusion and irradiation, and finally a polypropylene foam material with a ratio of 5-30 times is obtained through high temperature foaming. The material has good compression resilience and can pass HF-1 test; the preparation method is simple, cheap, and can be mass-produced, and has high economic value.

The utility model relates to a liquid metal sheet base material heat-conducting fin which comprises a liquid metal sheet, a first heat-conducting and electric-conducting silica gel layer, a second heat-conducting and electric-conducting silica gel layer and a third heat-conducting and electric-conducting silica gel layer, the first heat-conducting and electric-conducting silica gel layer is attached to the top of the liquid metal sheet, and the second heat-conducting and electric-conducting silica gel layer is attached to the bottom of the liquid metal sheet. And the third heat-conducting and electric-conducting silica gel layer wraps the four side surfaces of the liquid metal sheet. The liquid metal sheet base material heat-conducting fin does not overflow after being heated, and is good in heat-conducting effect and good in shock absorption performance and compression resilience.

The invention relates to a high-resilience interval knitted fabric which comprises a first planar knitted fabric layer and a second planar knitted fabric layer, the first planar knitted fabric layer and the second planar knitted fabric layer are connected through woven interval yarns, and the interval yarns are parallel thermoplastic polymer composite monofilaments; the first component system and the second component system in any axial section of the parallel thermoplastic polymer composite monofilament are respectively arranged on two sides of the monofilament; the first component system and the second component system of the parallel thermoplastic polymer composite monofilament have shrinkage rate difference, and the shrinkage rate difference value is less than or equal to 15%; and the diameter of the parallel thermoplastic polymer composite monofilament is not less than 0.07 mm. The spacer yarns in the high-resilience spacer knitted fabric adopt the parallel thermoplastic polymer composite monofilaments, so that the durability of the spacer yarns is enhanced, and the compression resilience of the spacer knitted fabric is greatly improved.

This invention belongs to the field of inorganic nanofiber materials technology, specifically relating to a highly flexible boron nanofiber (BN) ceramic nanofiber and its preparation method. Using boric acid and melamine as main raw materials, this invention prepares the nanofiber through a complexation reaction, solution preparation, electrospinning, and heat treatment. The raw materials are inexpensive, the process is simple, and it is easy to scale up production. By heating the electrospinning needle at 90-120℃, the viscosity of the precursor needle tip is reduced, preventing premature crystallization of the complex and completely solving the needle clogging problem, ensuring continuous and stable spinning, and improving spinning efficiency and fiber quality. The resulting BN nanofibers are continuous, have uniform diameter, and a smooth surface. The controllable transformation from amorphous BN to highly crystalline hexagonal boron nitride can be achieved by adjusting the heat treatment temperature. The amorphous BN nanofiber felt has extremely low thermal conductivity (≤0.029 W / (m·K)) and excellent compression resilience, making it suitable as a reinforcement for composite materials or directly applicable in high-temperature filtration, high-efficiency heat insulation, and catalyst carriers.