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48results about How to "Strong mechanical properties" patented technology

Collagen-based and high-transparency matrix for cornea thickening and preparation method of collagen-based and high-transparency matrix

The invention discloses a collagen-based and high-transparency matrix for cornea thickening and a preparation method of the collagen-based and high-transparency matrix. The preparation method comprises the following steps: assembling a collagen composite solution into a collagen matrix implant on a set curvature mold through electrochemical deposition; the collagen composite solution is prepared from collagen, glacial acetic acid, hydrogen peroxide, heparin and water; putting the obtained collagen matrix implant and a mold into a cross-linking agent solution for cross-linking; cleaning the residual cross-linking agent after completion, separating the collagen matrix implant from the mold, and placing the collagen matrix implant under an ultraviolet light source for cross-linking to obtain a double-cross-linked collagen matrix implant; and soaking the double-crosslinked collagen matrix implant in a nerve growth factor solution, and performing absorption and combination to obtain the collagen-based and high-transparency matrix for cornea thickening. According to the invention, an electro-deposition assembly technical scheme is adopted, the diameter and thickness of collagen assembly fibers are adjusted and controlled through electric field energy, and the collagen assembly fibers are orderly and regularly arranged, so that scattering and refraction of light are reduced, the light transmittance of cornea is increased and can reach more than 90%, and the problem of light blocking caused by materials is effectively avoided. Operation is matched with femtosecond equipment, operation is easy, consumed time is short, and trauma is small.
Owner:JIANGSU BOCHUANG BIOTECHNOLOGY CO LTD

A preparation method and application method of conductive concrete

A method for preparing conductive concrete comprises the following steps: firstly, evenly mixing expandable graphite, concrete raw materials and carbon fibers to obtain an initial mixture, then adding water to the initial mixture and stirring to obtain concrete slurry, then curing the concrete slurry to obtain a solidified body, and then heating the solidified body to expand the expandable graphite, thereby obtaining the conductive concrete, and the heating temperature is 200°C-600°C. This design not only has better conductivity and lower production cost, but also can improve mechanical properties, and has a wide range of applications, such as indoor climate control, road deicing or cooking.
Owner:WUHAN TEXTILE UNIV

A preparation method and product of conductive concrete with high mechanical properties

A method for preparing conductive concrete with high mechanical properties, firstly bonding multiple expandable graphite particles on the outer periphery of conductive fibers, then standing to wait for bonding and curing to obtain graphite fibers, then uniformly mixing multiple graphite fibers with concrete raw materials, then adding water and stirring to obtain concrete slurry, then standing the concrete slurry to cure to obtain a solidified body, then connecting the two ends of the solidified body to a circuit to energize the solidified body, the graphite fibers after energization heat up, the heating temperature is 200℃-500℃, when the expandable graphite particles in the solidified body expand due to heat, the conductive concrete with high mechanical properties can be obtained. This design not only has better interface performance and can improve the mechanical strength of the final product, but also has better conductive effect and lower production cost.
Owner:WUHAN TEXTILE UNIV

A fibrinogen-based patch and its preparation method and application

ActiveCN116531551Bstrong interactionStrong mechanical propertiesSurgical adhesivesPharmaceutical delivery mechanism
The present invention discloses a fibrinogen-based patch, a preparation method and application thereof, wherein the patch comprises fibrinogen and a stabilizer, wherein some lysine residues of the fibrinogen contain hydrophobic groups; and the stabilizer is used to maintain the activity of the fibrinogen. The preparation method comprises: adding a hydrophobic modification reagent dropwise to a fibrinogen solution, performing dialysis after the reaction, and then freeze-drying to obtain the patch. The patch prepared by the method has excellent mechanical strength and adhesion properties, and its performance is significantly better than that of existing surgical adhesive products and emergency hemostasis products under the same conditions. The patch has good biocompatibility, can be absorbed by the human body, and has great potential in clinical applications.
Owner:ZHEJIANG UNIV

A gas diffusion layer and a method for preparing the same

ActiveCN116826093BStrong mechanical propertiesExtended operating rangeCell electrodesCollectors/separatorsFiberCarbon fibers
The present application relates to a gas diffusion layer and a preparation method thereof, and belongs to the field of fuel cell technology; the gas diffusion layer comprises carbon fiber, a conductive agent and a hydrophobic agent, the carbon fiber is distributed in a porous skeleton to form a carbon fiber skeleton, and the conductive agent and the hydrophobic agent are attached to the carbon fiber skeleton; the gas diffusion layer takes carbon fiber as a substrate, and adds a conductive agent and a hydrophobic agent, so that the conductivity and drainage performance of the GDL are more excellent, and it has stronger mechanical properties. Compared with the traditional GDL, it does not have a GDB layer and an MPL layer, which makes it thinner, and the internal resistance of the body and the internal resistance between it and the CCM are both smaller. When applied to a membrane electrode, the gas distribution during the operation of the membrane electrode is more reasonable, which broadens the operating range of the membrane electrode, and thus can take into account the performance of the membrane electrode at high humidity and low humidity.
Owner:DONGFENG MOTOR GRP

Display module and display device

The invention relates to a display module and a display device.The display module comprises a display panel, a supporting body and an auxiliary supporting piece, the display panel comprises a first non-bending area, a bending area and a second non-bending area which are connected in sequence, and the two sides, in the first direction, of the supporting body are attached to the first non-bending area and the second non-bending area correspondingly; one part of the side face of the auxiliary supporting piece is fixedly connected to the side, facing the bending area, of the supporting body, and the other part of the side face of the auxiliary supporting piece is fixedly connected to the side, close to the second non-bending area, of the first non-bending area. According to the display panel, the position, close to the bending area, of the first non-bending area has high mechanical performance, in the process that production of the display module is completed and a falling ball test is carried out, bad test results such as bright spots and dark spots are not prone to occurring in the corresponding positions, and the display panel has the good display effect.
Owner:JIANGSU HUIXIAN DISPLAY TECHNOLOGY CO LTD

An acoustic structure with low frequency and wide band noise reduction and a design method of the acoustic structure

ActiveCN119920227BStrong mechanical propertiesAnechoic frequency bandwidthSustainable transportationFuselage insulationResonanceEngineering
The application belongs to the field of acoustics, and discloses a low-frequency and wide-band noise reduction acoustic structure and a design method of the acoustic structure. The acoustic structure comprises a plurality of acoustic structural members and an embedded member. At least one embedded member is arranged in the plurality of acoustic structural members. On the same embedded member, the acoustic structural members in communication with the two open ends of the embedded member are arranged in pairs and jointly form a first unit. The acoustic structural member not in communication with the embedded member is a second unit. The first unit and the second unit are arranged in parallel. Compared with the prior art, when sound waves pass through the acoustic structural members arranged in pairs, the coupling resonance generated in the acoustic structural members can widen the noise reduction frequency band at a certain resonance frequency in the low-frequency range. The added embedded member can generate a new noise reduction frequency band. The weak coupling effect between the parallel units can further widen the noise reduction frequency band. Finally, the low-frequency and wide-band noise reduction effect is achieved.
Owner:SHANGHAI AIRCRAFT MFG

Golf club head alloy and method of manufacturing a golf club head

PendingCN122707000AReduce hard and brittle phaseLow Young's modulus
A golf club head alloy is provided to solve the problem that the existing alloy cannot be used to make a striking face plate. The golf club head alloy includes 11-13% by weight of molybdenum, 5-7% of zirconium, 0.5-2.5% of iron and 3-4% of aluminum, and the golf club head alloy further includes a balanced amount of titanium and inevitable impurities. Through the above-mentioned composition, the hard and brittle phase of the golf club head alloy can be reduced, so that the striking face plate made of the golf club head alloy can pass the golf ball impact test, and whether the striking face plate is heat treated is determined according to the needs of the user, so that the striking face plate can have high rebound performance or high strength characteristics. The present application also relates to a method for manufacturing a golf club head from the golf alloy.
Owner:FUSHENG IND CO LTD

A pei or peek-based 3d-printed wave-absorbing material and a method of making the same

The application discloses a kind of PEI or PEEK-based 3D printing wave-absorbing materials and preparation method thereof.The 3D printing wave-absorbing material includes the following components by mass fraction: polyetherimide resin or polyether ether ketone resin: 45~65 parts;Electromagnetic wave absorber: 10~50 parts;Impact modifier: 4~12 parts;Flow aid: 2~8 parts;Antioxidant: 0.5~3 parts;Wherein, the electromagnetic wave absorber includes magnetic absorber and carbon-based absorber, the impact modifier and the carbon-based absorber are pre-coated to form the carbon-based absorber coated with the impact modifier on the surface, and the magnetic absorber is surface modified by silane coupling agent.The application significantly improves the mechanical properties and thermal stability of the material by using specific raw material composition and combining specific multi-layer co-extrusion and online heat treatment process.The preparation process is simple and easy to operate, and is suitable for industrial continuous production.
Owner:HUNAN BOOM NEW MATERIALS

Precision preform soldering and method of making

The application provides a precision preformed soldering piece and a preparation method thereof. By arranging a graphene layer between the preformed soldering piece and a flux layer, the welding quality and efficiency can be improved, the energy consumption and environmental pollution in the welding process can be reduced, the welding strength and corrosion resistance can be improved, the oxidation and thermal stress in the welding process can be reduced, the cavity rate can be reduced, the precision can be improved, fullerene is added in the alloy raw material, the fullerene has high chemical stability and strong mechanical properties, can form strong bonding with rare earth metals, has high heat conduction performance, can effectively dissipate heat, avoids overheating of the welding part to cause failure, significantly reduces the cavity rate, improves the precision of the welding, reduces the welding temperature required by the preformed soldering piece, and has excellent oxidation resistance, which can effectively prevent the oxidation of the metal surface.
Owner:ZHONGSHAN HANHUA TIN CO LTD +1

A method for preparing whole-biological enzyme-degradable particles

The invention discloses a preparation method of a fully bio-enzyme-degradable particle, and relates to the technical field of biodegradable materials. The invention uses 5,6-epoxyhexyltriethoxysilane to modify modified calcium carbonate and a trace amount of ferrosoferric oxide, and then disperses them in a cellulose hydrogel precursor solution. When cellulose self-associates into a three-dimensional network structure, the particles are firmly fixed in its micro-nano pore structure, thereby enhancing the stability of the degradation particle matrix, using starch as a water absorbent, epoxy soybean oil as a plasticizer, and modified rigid particle composite cellulose as a reinforcement, and blending with polylactic acid as a carrier, and then, by hot pressing and curing to obtain degradation particles, the inorganic nanoparticles are more firmly combined with the matrix under the dual influence of temperature and pressure, thereby enhancing the mechanical properties of the film.
Owner:FUJIAN DELV NEW MATERIAL TECH CO LTD

Shielding material for thermoplastic polyvinyl direct-current power cable and preparation method of shielding material

The invention discloses a shielding material for a thermoplastic polyvinyl direct-current power cable as well as a preparation method and application of the shielding material, and relates to the technical field of composite materials. The invention relates to a shielding material for a thermoplastic polyvinyl direct-current power cable. The shielding material comprises the following components in parts by weight: 70-74 parts of polyethylene resin; 22 to 28 parts of filler; 2-6 parts of an auxiliary agent; the filler comprises first conductive carbon black and second conductive carbon black, the particle size of the first conductive carbon black is not less than 30nm, and the particle size of the second conductive carbon black is not more than 15nm. The shielding material is adaptive to an existing thermoplastic polyethylene insulating material, the electric field distortion degree of an insulating / shielding interface is effectively reduced, charge injection into an insulating layer is inhibited, the electric field distortion degree in the insulating layer is effectively reduced, and therefore the electrical characteristics of the insulating material are improved.
Owner:GUANGDONG POWER GRID CO LTD +1

Device for testing temperature sensing cable

The utility model relates to the technical field of cable maintenance devices, and discloses a device for testing a temperature sensing cable, which comprises a box body assembly, the interior of the box body assembly is of a hollow structure, a first surface and a second surface of the box body assembly are provided with holes, and the first surface and the second surface are two opposite surfaces of the box body assembly. The hollow structure and the two open holes form an accommodating cavity for accommodating a temperature sensing cable; the heating piece is arranged in the box body and is used for heating the accommodating cavity; and the temperature control assembly is arranged in the box body, the temperature control assembly is electrically connected with the heating piece, the temperature control assembly is used for obtaining the temperature in the containing cavity, and the temperature control assembly is further used for controlling the heating temperature of the heating piece. The temperature-sensing cable monomer debugging device can reduce the test manpower demand, improve the working efficiency of testers, can be repeatedly used in a subsequent nuclear power unit, reduces the material loss, can be used for debugging the temperature-sensing cable monomer of a nuclear power plant fire alarm system, and can also be used for debugging other monomers equipped with temperature-sensing cables for nuclear power plant and the like.
Owner:CHINA NUCLEAR POWER ENGINEERING CO LTD

Method and device for preparing supporting heat insulation block

PendingCN119636115AGood insulation performanceStrong mechanical propertiesCoatingsGlass fiberPolymer science
The invention relates to a preparation method and a preparation device of a supporting heat insulation block. Firstly, epoxy resin, an amine epoxy resin curing agent, a flame retardant and a filler are put into a glue mixing machine to be uniformly mixed, and a glue material is obtained; impregnating glass fiber cloth in the sizing material through an impregnator, so that the surface of the glass fiber cloth is fully coated with the sizing material; fully dipping the glass fiber cloth by using a dipping roller press, cutting the dipped glass fiber cloth, paving and stacking the glass fiber cloth in a molding press, and heating, curing and molding; and finally demolding to obtain a composite material supporting heat insulation block product. The process is simple in steps and easy to implement, and meanwhile, the prepared composite material supporting heat insulation block product has excellent heat insulation performance, low density and good mechanical property.
Owner:SHANGHAI CHINA SHIPBUILDING MATERIALS ENG CO LTD +1

Preparation method of negative electrode coating material of aqueous zinc ion battery and application thereof

ActiveCN119400795BStrong mechanical propertiesStrong chemical stabilityElectrode manufacturing processesActive material electrodesElectrolytic agentElectrical battery
The application belongs to the technical field of negative electrode materials of aqueous zinc ion batteries, and discloses a preparation method of a negative electrode coating material of an aqueous zinc ion battery and application thereof. The application uses graphite phase carbon nitride as a matrix material, loads enzymatic hydrolysis lignin in the graphite phase carbon nitride to synthesize enzymatic hydrolysis lignin graphite phase carbon nitride composite material, the synthesized material not only has strong mechanical properties and chemical stability, but also can effectively inhibit the corrosion of electrolyte to the surface of zinc negative electrode. The enzymatic hydrolysis lignin is loaded on the graphite phase carbon nitride to prepare the required zinc negative electrode coating material. The coating material serves as a protective layer of the negative electrode material of the aqueous zinc ion battery, can solve the problems of the zinc ion battery negative electrode in the charging and discharging process, inhibit hydrogen evolution, corrosion, side reaction and dendrite of the zinc negative electrode, and effectively improve the stability and charging and discharging cycle efficiency of the aqueous zinc ion battery.
Owner:DALIAN UNIV

A foam ceramic building block and its preparation method and use method

The present invention provides a foam ceramic building block and a preparation method and a use method thereof. The raw materials of the building block include: 100 parts of a main material, 5 to 20 parts of a pore-forming agent, and 5 to 10 parts of a filler. Tap water tail mud, aluminum ash, flue ash and sulfuric acid slag are ground into powder as the main material, at least one of boron mud, carbide slag and industrial salt mud is dried and ground into powder as a pore-forming agent, at least one of pine nuts, castor beans and Spartina alterniflora powder is crushed as a filler, the above raw materials are mixed to form embryos, calcined and cooled to obtain building blocks. The foam ceramic building blocks prepared by the present invention are adhered to each other by applying a masonry agent. The foam ceramic building block has the characteristics of strong mechanical properties, good thermal insulation effect and excellent sound absorption capacity, and is of great significance in the fields of improving the comprehensive utilization rate of solid waste and developing energy-saving building materials.
Owner:THE THIRD CONSTR OF CHINA CONSTR EIGHTH ENG BUREAU

A bio-based polyamide carbon fiber reinforced material and its preparation method

This invention relates to a bio-based polyamide carbon fiber reinforced material, comprising the following components: 100 parts by weight of pentanediamine polyamide resin; 10-30 parts by weight of furanyl polyester resin; 1-5 parts by weight of chain extender; and 10-50 parts by weight of carbon fiber. The preparation method includes acid-alcohol treatment of the carbon fiber: impregnating the carbon fiber in a liquid of polybasic acid and polyol, heating and dehydrating it, then blending the acid-alcohol treated carbon fiber with pentanediamine polyamide resin, furanyl polyester resin, and chain extender, and curing to obtain the reinforced material. This invention improves the bond strength and water absorption of pentanediamine polyamide and carbon fiber, resulting in a reinforced material with strong mechanical properties, low water absorption, and a certain degree of biomass content.
Owner:JIANGSU AOSHENG COMPOSITE MATERIALS HI TECH

Silicon-carbon composite material as well as appearance evaluation standard and application thereof

The invention provides a silicon-carbon composite material as well as an appearance evaluation standard and application thereof, and relates to the technical field of battery negative electrode materials. The silicon-carbon composite material comprises sphere-like silicon-carbon particles, and each sphere-like silicon-carbon particle comprises a silicon-carbon plane and a silicon-carbon transition cambered surface adjacent to the silicon-carbon plane; and the minimum value of the curvature of the cambered surface infinitesimal element of the silicon-carbon transition cambered surface at the joint of the silicon-carbon transition cambered surface and the silicon-carbon plane is 0. The material is of a sphere-like structure containing a plane and an adjacent transition cambered surface, the structure and a base body can form three-dimensional interlocking, mechanical binding force is enhanced, interface crack propagation is restrained, particles can be promoted to be directionally arranged to form regular and uniform slit-shaped channels / pores, the compression resistance and abrasion resistance of the material are improved, the stacking density is increased, and the contact area is increased. And the silicon-carbon composite material has excellent electrochemical performance. The shape evaluation standard represented by the polyhedron degree Q (0-1, the closer to 1, the closer to an ideal polyhedron) is provided, the problem that the shape of an existing polyhedral material lacks a unified evaluation standard is solved, a scheme is provided for similar polyhedral material evaluation, and material design, screening and application are promoted.
Owner:LANXI ZHIDE ADVANCED MATERIALS CO LTD

Bipolar plate and preparation method thereof

ActiveCN119650742AStrong mechanical propertiesavoid deformationFuel cell detailsConvex structureCooling fluid
The invention relates to a bipolar plate and a preparation method thereof, the bipolar plate comprises a cathode plate and an anode plate, a first gasket and a second gasket are superposed between the cathode plate and the anode plate, one surface of the first gasket and one surface of the second gasket are both provided with array-type protrusions, and the surfaces of the first gasket and the second gasket with the protrusions are arranged in a staggered manner. The faces without protrusions are connected with the negative plate and the positive plate respectively, and a plurality of cooling liquid flow channels can be formed after the protrusions of the first gasket and the second gasket make contact in a staggered mode. A flow channel groove structure for cooling liquid to flow can be directly formed between the convex structures which are matched in a staggered mode, the structure is simple and convenient, on the other hand, a point-line contact mode generated between the convex structures has high mechanical performance under the pressed condition, deformation is not prone to occurring, and the service life is long. Therefore, the overall mechanical strength of the bipolar plate can be effectively improved while the bipolar plate structure is provided with the cooling liquid flow channel grooves, effective support can be provided in the process of assembling the bipolar plate into a pile, and the deformation phenomenon is reduced.
Owner:DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES

Fiber-modified concrete segments suitable for dual control of micro and macro cracks and their preparation method

ActiveCN121651789BAchieve whole-process collaborationlimit widthDischarging arrangementUnderground chambersCrude fibreSteel fibre
This invention belongs to the field of concrete building materials technology, and discloses a fiber-reinforced concrete segment suitable for dual control of micro-cracks and macro-cracks, and its preparation method. The fiber-reinforced concrete segment comprises cement-based concrete and crack-resistant fibers and structural fibers compositely added to the cement-based concrete. The crack-resistant fibers are fine steel fibers with a diameter of 0.15-0.25 mm and a length of 10-15 mm; the structural fibers are coarse polypropylene fibers with a diameter of 0.8-1.2 mm and a length of 40-60 mm; the volume fraction of the crack-resistant fibers is 0.5%-0.8%; and the volume fraction of the structural fibers is 0.5%-0.9%. The fiber-reinforced concrete segment provided by this invention can achieve continuous crack control, synergistic effect, and better economic efficiency.
Owner:中铁科学研究院集团有限公司

Composite I-beam structural slab based on 3D printing

The utility model discloses a composite I-shaped beam structural plate based on 3D printing. The composite I-shaped beam structural plate is of a series of rectangular grid structures composed of a plurality of I-shaped beam components, a front-layer surface plate, a rear-layer surface plate, a left-layer surface plate, a right-layer surface plate and rectangular beams. The front and rear surface plates and the left and right surface plates are horizontally arranged in parallel and are mutually connected to form a rectangular frame structure; the I-shaped beams and the rectangular beams are arranged in the rectangular frame structure, the rectangular beams are arranged on the front portion and the rear portion of each row of I-shaped beam component set respectively, the two ends of each rectangular beam are connected with the left surface plate and the right surface plate, the rectangular beams are arranged in four rows, and each I-shaped beam component is connected with the front rectangular beam and the rear rectangular beam of the I-shaped beam component into an integrated structure. The composite I-beam structural slab based on 3D printing provided by the utility model has stronger mechanical properties and can meet the requirements of different working environments. The I-shaped beam structure has various mechanical properties such as excellent impact resistance, wearing resistance, folding resistance and bending performance.
Owner:SHENYANG AEROSPACE UNIVERSITY

Ni-W bimetallic catalyst, its preparation method and application

The application relates to a Ni-W bimetallic catalyst and a preparation method and application thereof, and the preparation method comprises the following steps: I. dissolving a soluble nickel salt, a soluble tungsten salt, and urea and ammonium fluoride in water to form a precursor solution; II. taking carbon paper as a carrier, immersing the precursor solution obtained in the step I in water, and performing hydrothermal reaction to grow the catalyst on the carbon paper; III. performing heat treatment on the carbon paper loaded with the catalyst obtained in the step II under a nitrogen atmosphere to prepare the Ni-W bimetallic catalyst. The Ni-W bimetallic catalyst prepared by the application presents a nano flower morphology, exposes more reaction active sites, the surface of the Ni-W bimetallic catalyst co-modified by single-atom tungsten and metal defects can enhance the adsorption of 5-hydroxymethylfurfural, the bulk phase composed of the Ni-W solid solution induces the generation of more active sites, greatly improves the overall catalytic activity, and realizes high HMF conversion rate, high 2,5-furan dicarboxylic acid yield and high faraday efficiency.
Owner:UNIV OF SCI & TECH OF CHINA

A method for dynamic adjustment of phase of frequency lock feedback with strong interference suppression

ActiveCN115663582Baccurate error signalStrong mechanical propertiesLaser detailsMechanical engineeringHigh voltage
A method for dynamic adjustment of frequency locking feedback phase in strong interference is disclosed, which comprises the following steps: scanning laser frequency by modulating driving current of semiconductor laser, collecting transmission cavity mode signal of optical resonant cavity by photoelectric detector, obtaining error signal for controlling feedback phase based on asymmetry and amplitude of transmission cavity mode signal, amplifying error signal by high voltage amplifier and then applying it to piezoelectric ceramic material with mirror adhered, controlling expansion and contraction of piezoelectric ceramic, and realizing dynamic adjustment of feedback phase. The method has very wide phase adjustment range based on asymmetry and amplitude of transmission cavity mode signal, and can realize stability of feedback system even in harsh environment.
Owner:CHONGQING UNIV

Water pipe single kettle bimodal polyethylene and preparation method thereof

The application belongs to the technical field of polyethylene, and particularly relates to single-kettle bimodal polyethylene for water supply pipes and a preparation method thereof. The single-kettle bimodal polyethylene for water supply pipes is prepared by using ethylene as raw material, hydrogen as molecular weight regulator, a main catalyst and a cocatalyst, and a gas phase fluidized bed process to perform copolymerization with 1-hexene in a single reactor. The main catalyst is a supported metallocene bimetallic catalyst which is prepared by loading bis(cyclopentadienyl)zirconium dichloride, dichlorotitanocene and bis-arene imidazole pyridine iron complex on a silica carrier. The length of tie molecules and the lamella thickness are increased by increasing the polyethylene molecular weight. Meanwhile, the content of the comonomer in the polyethylene molecular chain is increased, which further increases the entanglement effect of the tie molecules between the lamellas, so that the lamellas are not easy to slip, thereby improving the slow crack growth resistance of the material.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

A hot-melt benzoxazine resin composition, prepreg, composite material and preparation method thereof

The present invention provides a hot-melt benzoxazine resin composition, a prepreg, a composite material and a preparation method thereof, wherein the hot-melt benzoxazine resin composition comprises the following components by weight: 30-80 parts of benzoxazine resin, 10-50 parts of epoxy resin, 10-30 parts of toughening agent, 2-15 parts of flame retardant, 10-25 parts of curing accelerator and 1-15 parts of epoxy diluent. The hot-melt benzoxazine resin composition, prepreg, composite material and a preparation method thereof have the characteristics of high heat resistance, strong mechanical properties, good flame retardancy, low product porosity and the like, and meet the requirements of aviation applications.
Owner:BEIJING COMPOSITE MATERIALS CO LTD +1

Carbon fiber composite transmission shaft and forming die and forming method thereof

The invention discloses a carbon fiber transmission shaft and a forming mold and a forming method thereof, and relates to the field of carbon fiber composite materials. The carbon fiber transmission shaft comprises a transmission shaft body and a shaft head. The transmission shaft body is made of a carbon fiber composite material and is tubular, and shaft heads are arranged in cavities at two ends of the transmission shaft body; the shaft head is made of metal or alloy and is tubular; the shaft head and the transmission shaft body are installed in an inverted fit mode. And the shaft head and the transmission shaft body are co-cured integrally formed parts. The invention further discloses a forming die and a forming method, reverse buckling type connection and co-curing integrated forming of the transmission shaft body and the shaft head can be achieved on the basis of the forming die and the forming method, and the defects caused by the fact that in the prior art, a carbon fiber composite transmission shaft cannot be wound away after connection and after connection are overcome. The connection strength of the carbon fiber composite transmission shaft is improved, the dynamic balance of the transmission shaft is optimized, and the production efficiency is improved.
Owner:江苏亨睿弗劳恩新材料研发有限公司

Flexible self-supporting material as well as preparation method and application thereof

The invention belongs to the field of flexible battery energy storage, and relates to a flexible self-supporting material and a preparation method and application thereof. The flexible self-supporting material comprises a carbon nanotube film, a Si / Ge film and a liquid metal film which are arranged in sequence. According to the invention, the carbon nanotube film is used as a flexible carrier, has good flexibility, mechanical property, conductivity and ultra-light weight, can greatly reduce the proportion of inactive substances in the electrode, and improves the energy density of the electrode material. Meanwhile, Si is easy to fall off from the traditional current collector Cu to cause damage to the electrode structure, and the carbon nanotube film well improves the defect and improves the stability of the electrode material.
Owner:CHINA PETROLEUM & CHEMICAL CORP +2

High-strength waterproof formaldehyde-free impregnated paper adhesive and preparation method thereof

InactiveCN119529707ALeading viscosityLeading solid contentProtein adhesivesStarch adhesivesEpoxyPolymer science
The invention discloses a high-strength water-resistant formaldehyde-free impregnated paper adhesive and a preparation method thereof, and relates to the technical field of formaldehyde-free impregnated paper, the high-strength water-resistant formaldehyde-free impregnated paper adhesive comprises the following raw materials by mass: 40-100 parts of an auxiliary additive; by arranging the auxiliary additive, the waterproof agent, the epoxy resin, the natural rubber raw material, the polyvinyl alcohol, the aromatic and the pigment, the adhesive disclosed by the invention is greatly advanced in the aspects of viscosity, solid content, high-temperature-resistant effect, water-resistant effect and drying speed compared with an existing adhesive, and does not contain formaldehyde or derivatives thereof; the environment-friendly impregnated paper adhesive has the advantages that the environment-friendly requirement is met, harmful gas is not released in the use process, the harm of formaldehyde in the traditional impregnated paper adhesive is effectively avoided, the use requirement is met, each link is conveniently monitored and managed in real time by improving the preparation process, the problem point can be found in the first time when the preparation is abnormal, and the production efficiency is improved. And performing corresponding processing.
Owner:临沂江源装饰材料有限公司

Preparation method and application of wood-based heavy metal adsorbent

The invention discloses a method for preparing a wood-based heavy metal adsorbent, wherein the wood-based heavy metal adsorbent takes a wood block as a substrate, is treated with epichlorohydrin to obtain an end-epoxy wood-based material, is then treated with ethylenediamine to obtain an amination wood-based material, and is finally treated with sodium chloroacetate to obtain the wood-based heavy metal adsorbent. The wood-based heavy metal adsorbent has good adsorption performance for Fe(II), Fe(III), Cr(III) and Cr(VI) under the conditions of pH of 1-6 and temperature of 10°C or above.
Owner:TIBET YUANTIDE BIOTECHNOLOGY CO LTD

A porous composite polymer solid-state electrolyte, a preparation method thereof, and a solid-state sodium ion battery

The application discloses a kind of porous composite polymer solid electrolyte and preparation method and solid sodium ion battery thereof.The porous composite polymer solid electrolyte of the application is made of deep eutectic solvent, additive, polymer solution and sodium superionic conductor;The deep eutectic solvent is composed of sodium ion-containing hydrogen bond acceptor and hydrogen bond donor, the sodium ion-containing hydrogen bond acceptor is selected from any one of sodium hexafluorophosphate, sodium tetrafluoroborate, sodium dihydrogen phosphate, sodium difluoro oxalate borate, sodium bis-trifluoromethyl sulfonamide, sodium bisfluorosulfonamide, sodium perchlorate, sodium nitrate, sodium chloride and sodium difluorophosphate;The additive is ethylene carbonate and propylene carbonate;The polymer solution is composed of polymer and organic solvent;The mass ratio of sodium superionic conductor and polymer is 1: (2-5).The porous composite polymer solid electrolyte of the application has excellent ion conductivity, flame retardancy, strong mechanical properties and excellent safety.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)