153results about How to "High elastic modulus" patented technology

The invention relates to the technical field of building materials, and particularly discloses high-strength lightweight concrete containing hollow glass beads and a preparation method of the high-strength lightweight concrete. The high-strength lightweight concrete containing the hollow glass beads is prepared from cement, fly ash, carbon fiber grafted hollow glass beads, lightweight sand, deionized water, polypropylene fiber grafted rubber particles and a water reducing agent according to the mass ratio of (58-75): (25-38): (45-65): (20-40): (42-55): (35-55): (5-12) through mixing, mold filling, vibration molding, covering and demolding. The addition amount of the hollow glass beads is strictly controlled, the influence on the overall strength of the concrete is avoided, the density and weight of the concrete are reduced due to the addition of the light sand and the hollow glass beads, the compactness and integrity of the concrete are improved due to the synergistic effect of the two added fibers, and the raw materials have excellent cohesiveness; the concrete can effectively absorb and disperse stress, and has the advantages of excellent strength, light weight, good durability and excellent comprehensive performance.

The invention relates to the field of cables, and discloses a high-strength corrosion-resistant ship cable and a preparation method thereof.The high-strength corrosion-resistant ship cable comprises a guide core, an insulating layer wrapping the outer portion of the guide core, a shielding layer wrapping the outer portion of the insulating layer and a sheath layer wrapping the outer portion of the shielding layer; the sheath layer comprises the following components in parts by weight: 40-55 parts of polyvinyl chloride, 20-30 parts of nitrile rubber, 5-15 parts of modified basalt fiber, 3-8 parts of a flame retardant, 1-2 parts of a lubricant and 0.1-1 part of a light stabilizer; the modified basalt fiber is a basalt fiber grafted macromolecular antioxidant modified basalt fiber, and the flame retardant is prepared from the following raw materials: phosphonitrilic chloride trimer, DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) and a hydroxyl-terminated phosphorus-containing intermediate. The cable is endowed with excellent mechanical property, salt spray corrosion resistance, thermo-oxidative aging resistance and flame retardant property.

The invention relates to the technical field of building materials, in particular to a wollastonite fiber-based high-temperature-resistant geopolymer and a preparation method thereof, and the high-temperature-resistant geopolymer is prepared from the following raw materials in parts by weight: 360 to 370 parts of metakaolin, 850 to 855 parts of fly ash, 470 to 475 parts of alkali activator, 160 to 165 parts of water and 121 to 183 parts of wollastonite fiber. By doping the wollastonite fiber, the pore structure of the geopolymer can be optimized, and the bridging effect of the fiber can effectively prevent microscopic cracks from developing to the macroscopic level, so that the mechanical property and high temperature resistance of the geopolymer are improved. The wollastonite fiber geopolymer disclosed by the invention has the advantages of good mechanical property, high temperature resistance and the like.

The invention provides a high-performance epoxy resin grouting material as well as a preparation method and application thereof, the epoxy resin grouting material comprises a component A, a component B and a component C which are mixed according to a mass ratio of 100: (30-40): (650-980) during use; the component A comprises 100 parts of epoxy resin, 20-35 parts of a reactive diluent, 1-2 parts of a wetting dispersant and 0.3-1 part of a defoaming agent; the component B comprises 100 parts of a modified amine curing agent, 12-30 parts of amino modified POSS (Polyhedral Oligomeric Silsesquioxane) and 5-15 parts of a curing accelerator; and the component C comprises 100 parts of cement and black gold sand with different mesh numbers. The high-density, low-oil-absorption and high-strength black gold sand aggregate is introduced, so that the prepared epoxy grouting material has the advantages of high fluidity, good pouring performance, good comprehensive strength and high compressive elastic modulus, and the performance of the epoxy grouting material is far superior to that of a traditional epoxy grouting material. And the introduced high-density black gold sand aggregate improves the slurry density, improves the slurry bubble escape efficiency, reduces the bubble content of the system, and improves the comprehensive compactness, so that the mechanical strength and the comprehensive performance are improved.

The invention belongs to the technical field of cutter materials, and particularly relates to a nano-composite coating hard alloy cutter for intermetallic compound / high-temperature alloy machining and a preparation method of the nano-composite coating hard alloy cutter. An intermetallic compound / high-temperature alloy is a novel key material for aero-engines, is a difficult-to-process material, has high red hardness and good wear resistance, is easy to generate brittle fracture at high temperature, and is easy to generate thermal expansion and deformation in the processing process. Lanthanum-doped tungsten carbide and modified nickel powder are matched with other raw materials to prepare a novel hard alloy matrix, a boron nitride composite material and magnetic chitosan in the coating are matched, the hard alloy cutter is prepared, through the combined action of multiple components, the bending strength and hardness of the cutter material are effectively improved, and the service life of the cutter material is prolonged. Therefore, the good binding force between the coating and the matrix is enhanced.

The invention belongs to the technical field of fabric coatings, and particularly relates to a self-cleaning sensing type composite coating for fabric and a preparation method of the self-cleaning sensing type composite coating. The self-cleaning sensing type composite coating comprises a polypyrrole coating, a ferroferric oxide coating and a hydrophobic polyurea modified coating. The self-cleaning sensing type composite coating has good self-cleaning performance, sensing performance, wave absorbing performance and hydrophobic performance.

The invention discloses a porous static pressure gas radial bearing based on piezoelectric shunt damping, and belongs to the technical field of static pressure gas bearings. Comprising a bearing shell, a bearing sleeve and a porous throttler which are arranged in the bearing shell in the axial direction, and a piezoelectric shunt damping module which is arranged between the bearing shell and the bearing sleeve and is axially fixed through a check ring. Wherein the piezoelectric shunt damping module is formed by connecting a force amplifier, a piezoelectric ceramic stack, a pre-tightening pressing block, a pre-tightening screw, a steel ball and a locking nut; the force amplifier is of an axisymmetric structure composed of two trapezoidal connectors, four thin-wall beams and two end plates. The piezoelectric shunt damping module is arranged in the bearing, vibration mechanical energy of the bearing sleeve is converted into electric energy through the piezoelectric ceramic stack, and net damping is provided for the bearing by consuming the electric energy generated by the piezoelectric ceramic stack through the external shunt resonance circuit, so that the amplitude of the rotor relative to the bearing at a high rotating speed is reduced; the high-speed stability of the bearing is improved.

The invention provides a thickening agent for an oil field fracturing fluid, a preparation method of the thickening agent and the fracturing fluid, and belongs to the technical field of fracturing fluids. Comprising a polymer, a synergist, a salt-resistant component, a structure regulator, a suspending agent and an emulsifier. The polymer prepared by the invention contains abundant anions and cations, including quaternary ammonium salt cation structures, sulfonate anions and the like, and molecular winding can be realized through mutual attraction of the anions and cations, so that the elasticity modulus is increased, the sand-carrying performance is improved, and the sand-carrying and thickening performance of the thickening agent is improved; the fracturing fluid has good temperature resistance, salt resistance, shearing resistance, water solubility and thickening property, integrates the functions of drag reduction, sand carrying, fracture forming, swelling prevention, discharge aiding, low damage and the like, and has wide application prospects.

The invention discloses injectable hydrogel for cartilage injury repair and a preparation method of the injectable hydrogel. The gel is prepared by crosslinking 3 to 4 parts of recombinant III type humanized collagen-sodium hyaluronate gel particles, 0.5 to 1 part of thrombin solution and 4 to 6 parts of fibrinogen solution. The recombinant III type humanized collagen-sodium hyaluronate-thrombin-fibrinogen gel for injection, prepared by the preparation method disclosed by the invention, has the advantages of high elastic modulus, good biocompatibility, good needle passing performance and long in-vivo degradation period. Particularly, the recombinant III type humanized collagen-sodium hyaluronate-thrombin-fibrinogen gel for injection prepared by the invention can effectively promote regeneration of cartilage tissues, and is an innovative cartilage repair gel.

The invention relates to a concrete filled steel tube arch bridge rib core ultra-high performance concrete mix proportion design method, which comprises the following steps: (1) taking slump, expansion and 28d compressive strength as response values, and adopting a response surface method to carry out mix proportion optimization design on a water-binder ratio and the composition of a cementing material to obtain the optimal value of the water-binder ratio and the composition of the cementing material; and (2) taking the slump, the expansion degree, the relative pressure bleeding rate, the segregation rate, the 28d compressive strength and the 28d elastic modulus as response values, and performing optimization design on the steel fiber mixing amount, the coarse aggregate and the binder ratio by adopting a response surface method to obtain the optimal values of the coarse aggregate substitution rate, the steel fiber volume mixing amount and the binder ratio. The concrete-filled steel tube core steel fiber ultra-high performance concrete mix proportion designed by adopting a response surface method can have good pumping performance under the condition of not performing high-temperature steam curing, and has the characteristics of high strength, high elastic modulus, micro-expansion and the like.

The invention belongs to the technical field of polyurethane resin, and particularly relates to a preparation method and application of thermoplastic carbon fiber sizing agent waterborne polyurethane resin.The preparation method comprises the following steps that (1) a prepolymer is prepared, specifically, 72-76 parts of polyester polyol and 20-24 parts of isocyanate are mixed and react, 13-16 parts of dimethylolpropionic acid and 6-9 parts of 1, 4-dihydroxy-2, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3-trimethyl-1, 3-trimethyl-1, 3-trimethyl-1, 3-trimethyl-1, 3-trimethyl-1, 3-trimethyl-1, 3-trimethyl-1, 3-trimethyl-1, 3-trimethyl-1, 2, 2-dimethyl piperazine and 40-50 parts of acetone react, 1-3 parts of triethylamine is added, a reaction is conducted for 5-10 min, then 2-4 parts of sodium ethylenediamine ethanesulfonate is added, and a prepolymer is obtained; (2) emulsifying: transferring the prepolymer into an emulsifier, adding 280-300 parts of an ice-water mixture, stirring, adding 6-8 parts of an ethylenediamine aqueous solution with the mass fraction of 18-20%, standing for 20-24 hours, removing acetone, adding a coalescing agent, a wetting agent, a defoaming agent and a lubricating agent, and uniformly stirring to obtain the waterborne polyurethane resin.

The invention relates to a metal surface self-adaptive modified reinforced additive material and a preparation process and method thereof, which are characterized in that silicate-containing natural minerals, amorphous carbon, SiO2, metal mixed powder, a curing agent, a defoaming agent, white grease and basic lubricating oil are mixed and stirred to react for 24-48 hours in a reaction kettle at 60 DEG C to generate a gel product. Through online intervention of functional materials, modification and reinforcement of additive materials, dynamic superfinishing and solid-liquid multi-component composite lubrication, an equipment extremely-low-friction self-lubricating environment is constructed, and the purposes of reinforcement of kinematic pair friction interface material performance, dynamic optimization of matching pair gaps, targeted repair of abrasion, reduction of friction abrasion, prolonging of the service life of equipment and improvement of the energy efficiency of the equipment are achieved. And the energy consumption and the operation and maintenance cost of the equipment in the whole life cycle are reduced.

The invention relates to a hydrated borate micromolecule with a boron-nitrogen coordination bond, a polyurethane elastomer material and a preparation method thereof, and the preparation method comprises the following steps: S1, dissolving and reacting 1, 4-benzene diboronic acid and a polyfunctional group amine compound at room temperature through a solution reaction to form a rigid eight-membered ring intramolecular boron-nitrogen coordination micromolecule NCBW-X; s2, polyester (polycaprolactone, polybutylene terephthalate, polylactic acid and the like) or polyether (polytetrahydrofuran, polypropylene ether polyol and the like) and diisocyanate (isophorone diisocyanate, toluene diisocynate and the like) react in a dry solvent at 80 DEG C by using a catalyst to form a prepolymer; hydrazide and NCBW-X are added into the obtained prepolymer for chain extension; the water resistance and the acid and alkali resistance of the material are enhanced through the boron-nitrogen coordination structure characteristic; and the prepared polyurethane elastomer material has very strong self-repairing efficiency and environmental adaptability.

The invention belongs to the technical field of food packaging materials, and particularly discloses a preparation method and fresh-keeping application of a wheat protein cross-linked edible nanocellulose coating film. The multifunctional edible composite coating film with good mechanical strength, water resistance, water binding capacity, self-healing property and transparency is successfully prepared by dissolving four substances of soybean seed coat nanocellulose, sodium alginate, wheat protein and lactone at high temperature to form a composite solution, and is applied to fruit preservation, such as bananas; the preparation method of the edible nanocellulose coating film is simple, and various properties are integrated and excellent.

The invention belongs to the technical field of adhesives, and relates to an epoxy resin composition, an epoxy resin adhesive film and application thereof. The epoxy resin composition comprises epoxy resin, a curing agent, a flexibilizer, a filler and rosin modified phenolic resin, the curing agent at least comprises a latent curing agent, the flexibilizer at least comprises acrylate rubber, the softening point of the rosin modified phenolic resin is 120-180 DEG C, the acid value is 40-100 mgKOH / g, and the filler is a filler. The rosin modified phenolic resin with the specific softening point and acid value is introduced, and the types of the curing agent and the flexibilizer are limited, so that the damping loss factor of an epoxy resin adhesive film prepared from the epoxy resin composition is relatively low in the range of 0-100 DEG C, and the stability of the damping loss factor is relatively high; meanwhile, the adhesive also has the characteristics of high elastic modulus, high toughness, high peel strength, good normal-temperature storage stability and good high-temperature rapid reactivity.

A diaphragm valve (10) has an axially driven valve shaft (12), a thrust member (14) and a diaphragm (16) including a diaphragm body (18) associated with the thrust member (14) and a diaphragm membrane (24) associated with a valve seat. The valve shaft (12) is drivingly coupled to a diaphragm body (18) by means of a thrust member (14), the diaphragm body (18) being axially arranged between the thrust member (14) and a diaphragm membrane (24). Here, the membrane film (24) has an elastic modulus of at least 1000 MPa.

The invention discloses a self-lubricating high-corrosion-resistance composite coating as well as a preparation method and application thereof, and belongs to the technical field of composite coating materials. The preparation method of the self-lubricating high-corrosion-resistance composite coating comprises the following steps: preparing a ceramic-fluoride-based composite coating on the surface of a metal substrate to obtain an intermediate material; the intermediate material is placed in liquid formed by heating and melting the solid-liquid reversible lubricating phase to be subjected to vacuum impregnation, so that the solid-liquid reversible lubricating phase permeates into the structural defects of the ceramic-fluoride-based composite coating; and then cooling and solidifying to solidify the solid-liquid reversible lubricating phase and remain in the structural defect. The preparation method is simple, rapid and efficient, the composite coating which is suitable for seawater or seawater-atmosphere alternating environment and integrates the self-lubricating function and the strong anti-corrosion function can be obtained, and the composite coating has the low friction coefficient and the excellent anti-corrosion performance and can be used for preparing ocean engineering equipment.

The invention belongs to the technical field of high-entropy alloys, and particularly relates to a CoCrNi series high-toughness high-density twin boundary medium-entropy alloy and a preparation method thereof. Aiming at the situation that the traditional alloy component design field lacks mature and reliable design principles, the invention provides three component design principles: high elastic modulus, low stacking fault energy and proper phase stability. Based on the three principles, the general formula of the non-equal-atomic-ratio medium-entropy alloy is CoaCrbNic, 30 < = a < = 37, 30 < = b < = 35, and 28 < = c < = 40. A metal raw material with the purity being 99.5% or above is polished and cleaned and then smelted into a cast ingot in a vacuum arc furnace, and then the medium-entropy alloy with high strength and toughness and the high-proportion twin boundary can be obtained after solid solution, hot rolling and recrystallization annealing processes are conducted. The design principle can also be popularized to other alloy systems, operation is easy, the production period is short, safety and reliability are achieved, and wide application prospects are achieved.

The invention relates to the technical field of alloy materials, in particular to a design and preparation method of a high-strength low-modulus Ti-Mo-Nb-Zr-Sn biomedical titanium alloy. Beta-type medical titanium alloy with low elastic modulus is designed by adopting a method of combining a physical metallurgical model and machine learning, a titanium alloy plate is prepared through cold working deformation, and finally, the cold-rolled plate is further strengthened by adopting short-time low-temperature deformation aging treatment. The Ti-Mo-Nb-Zr-Sn alloy obtained through the method has the excellent performance of high strength and low modulus, the tensile strength Rm is not lower than 775 MPa, the elastic modulus E is not higher than 45 GPa, the highest strength-modulus ratio is 22.2 * 10 <-3 >, from the aspect of the strength-modulus ratio, on the basis of the low elastic modulus, the mechanical compatibility of the alloy is remarkably improved through deformation aging treatment, the performance requirement is met, and meanwhile the mechanical property of the alloy is improved. The stress shielding phenomenon can be effectively improved, and the material can be used as a potential medical fixing material in clinical application.

The present invention discloses a modified expandable polystyrene particle, a preparation method and an application thereof, and relates to the technical field of polyurethane. The modified expandable polystyrene particle is used as a raw material to prepare a high-elasticity, low-density, temperature-controllable polyurethane foam. In the process of preparing the polyurethane foam, by adjusting the raw material components and proportions of the reaction two-component material, and adding expandable polystyrene particles and phase change composite materials at the same time, heat can be absorbed and the temperature generated by the reaction can be controlled, thereby avoiding the generation of high temperature. While foaming, the expandable polystyrene particles are combined with polyurethane through chemical bonds to ensure that the interface is free of defects, and a low-density, high-elasticity polyurethane foam is obtained. The preparation method of the present invention is simple, the source of raw materials is reliable, and it is suitable for direct production and use by existing polyurethane stock solution production enterprises, and the process is easy to control, and it is suitable for large-scale promotion and use.

The invention provides an aluminum alloy material for extrusion casting, which comprises the following components in percentage by weight: 6.5 to 11.5 percent of Si, 2.1 to 3.7 percent of Ni, 1.2 to 2.3 percent of Cu, 0.4 to 0.8 percent of Mg, 0.08 to 0.15 percent of Zr, B, Ti, Al2O3 and the balance of Al. The invention further provides a preparation method of the aluminum alloy material for extrusion casting. In the process of preparing the aluminum alloy material, mixed powder of titanium powder, boron powder and nanometer aluminum oxide powder is added into an aluminum alloy melt, the mixed powder is uniformly dispersed and distributed in an aluminum matrix under electromagnetic stirring, and the defect sensitivity of aluminum oxide particles to a matrix alloy is reduced through in-situ self-generated AlB2 and TiB2 in combination with an extrusion casting mode; and the interface bonding capacity of the aluminum oxide particles and the aluminum matrix is effectively enhanced, so that the aluminum alloy material with excellent mechanical property, high elastic modulus and high wear resistance is obtained, and the use requirements of the high-performance piston under the conditions of high temperature and high rotating speed can be met.

The invention provides a NiTiHf alloy for an aircraft bearing and a preparation method of the NiTiHf alloy. The method comprises the following steps: smelting Ni, Ti and Hf raw materials according to stoichiometry to obtain an alloy ingot; performing a thermal compression test on the alloy ingot to obtain stress-strain data of the alloy ingot; obtaining an energy dissipation diagram according to the relationship between the energy dissipation factor eta and the temperature as well as the strain rate, and obtaining a rheological instability diagram according to the relationship between the material rheological instability parameter xi and the temperature as well as the strain rate; and according to the energy dissipation diagram and the rheological instability diagram phase, a hot working diagram of the alloy ingot is obtained through superposition, hot working technological parameters of the alloy ingot are determined, and the hot working technological parameters comprise the hot working temperature and the strain rate. According to the method, the hot working parameters of the NiTiHf alloy with the specific stoichiometric ratio can be simply and conveniently determined, and therefore the problem that hot working is difficult due to the fact that the Hf element is introduced into the NiTi alloy can be solved.

The invention discloses an elastic bonding coating for preventing aluminum veneer deformation of a thermal insulation decorative integrated panel and a preparation method thereof. The coating comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by mass: 75 parts of polyol, 5 parts of catalyst, 4 parts of surfactant, 2 parts of foaming agent, 15 parts of flame retardant and 1 to 20 parts of polyamide 1212 elastomer low-foam particles; the component B comprises the following raw materials in parts by mass: 30 to 70 parts of crude MDI and 10 parts of phase change composite material; the elastic coating is sprayed on the back of the aluminum veneer and has the advantages of good wear resistance, corrosion resistance, high toughness, high resilience, aging resistance and the like.

The present invention addresses the problem of providing a methacrylic resin composition having high transparency, low haze, high heat resistance, high elastic modulus, and low water absorptivity; and providing a molded article thereof. Provided is a methacrylic copolymer comprising 5 to 96 mass% of a methyl methacrylate unit; 1 to 70 mass% of a structural unit (R) having in its main chain at least one ring structure selected from the group consisting of a glutaric anhydride unit and an N-substituted glutarimide unit; 1 to 48 mass% of an α-methylstyrene unit; and 1 to 48 mass% of a styrene unit, the N-substituted glutarimide unit being represented by the following formula (I): (wherein R1 and R2 are as described in the specification) .

The invention relates to the technical field of cosmetic preparations, and discloses a composition containing succinyl glycan and application of the composition to regulation and control of the repetition distance of a liquid crystal lamellar phase, the composition comprises a liquid crystal component and an effective amount of succinyl glycan, wherein the stratified phase repetition distance of liquid crystals in the composition can be effectively adjusted by adding the succinyl glycan, and the thermal stability of the composition is improved; small-angle X-ray scattering (SAXS) proves that the addition of the succinyl glycan enables the repetition distance of the lamellar phase of the liquid crystal to generate a measurable change of 6.2% to 19.4%; the invention provides a novel method for accurately regulating and controlling the liquid crystal structure of the cosmetic from the nanoscale, and the obtained composition has better stability, moisture retention and skin feeling in use.

The invention discloses a water-swelling elastic plugging agent for a water-based drilling fluid and a preparation method of the water-swelling elastic plugging agent. The water-swelling elastic plugging agent comprises the following components in parts by weight: 100 parts of a polyolefin elastomer matrix material; 15 to 20 parts of a reinforced matrix material; 0.8 to 1.5 parts of a polyolefin elastomer matrix material cross-linking agent; 8 parts to 15 parts of a reinforcing agent A; 20 to 30 parts of a reinforcing agent B; 15 to 30 parts of super absorbent resin; 15 to 20 parts of a plasticizer; 0.2 to 0.8 part of an isolating agent; 0.5 to 1 part of an anti-aging agent; the plugging agent provided by the invention is simple in preparation process, not only is beneficial to industrial production, but also is convenient to prepare plugging slurry on site, can achieve a good plugging effect, and provides an effective technical means for well leakage treatment.

The invention discloses a 3D printing manufacturing method of metal molybdenum and application of the 3D printing manufacturing method of the metal molybdenum in manufacturing of biological medical equipment. The 3D printing manufacturing method of the metal molybdenum comprises the steps that spherical molybdenum powder is loaded into 3D printing equipment for 3D printing manufacturing forming, the scanning power of 3D printing is 380-420 W, the scanning speed is 500-800 mm / s, the scanning layer thickness is 20-40 microns, the scanning interval is 70-100 microns, and the laser energy density is 118-280 J / mm < 3 >. The spherical molybdenum powder is used as the raw material, and metal molybdenum with high density, tensile strength sigma b, yield strength sigma 0.2 and elasticity modulus can be prepared by adopting a proper 3D printing forming process.

The invention discloses a formula and a manufacturing method of a high-emissivity resistance heating biological wave emitting chip, the high-emissivity resistance heating biological wave emitting chip comprises a supporting plate, a first emitting layer is fixedly compounded on the surface of one side of the supporting plate, and a second emitting layer is fixedly compounded on the surface of one side of the first emitting layer. Aluminum strip layers are fixedly connected to the outer side faces of the first emission layer and the second emission layer, a colloid protection layer is fixedly compounded on the surface of one side of the second emission layer, the colloid protection layer is fixedly connected to the outer surface of the aluminum strip layer, a positioning groove is formed in the surface of the other side of the supporting plate, a through hole is formed in the positioning groove, and a through hole is formed in the through hole. The through holes are aligned to the surface of the back of the first emission layer, a heating plate is fixedly connected to the interior of the positioning groove, the high-strength, high-heat-conductivity, high-vacuum adaptability, high elastic modulus, low thermal expansion coefficient, excellent thermal shock resistance, corrosion resistance and oxidation resistance and the like are achieved, the high emissivity is achieved, and machining and using are facilitated.

The invention discloses a method for preparing a near-stoichiometric yttrium oxide coating at a high deposition rate as well as a product and application of the near-stoichiometric yttrium oxide coating, and relates to the technical field of semiconductors. The yttrium oxide coating is prepared by adopting a physical vapor deposition intermediate-frequency reaction magnetron sputtering technology, and the oxygen flow and the target voltage are dynamically regulated and controlled through a closed-loop feedback control system, so that the target material works in a transition area between a metal mode and an oxidation mode. The target material is located between a metal mode and an oxidation mode, the deposition efficiency of the coating is remarkably improved, and the coating has the near-stoichiometric ratio characteristic and better mechanical and corrosion-resistant performance.

This invention belongs to the field of engineered wood products manufacturing, specifically a method for preparing low-formaldehyde finger-jointed boards based on bio-based modified adhesives. The method includes preparing an adhesive composed of modified soybean protein, non-formaldehyde crosslinking agents, micro / nano cellulose, nano-silica, and epoxidized vegetable oil elastomers; pre-treating the wood and cutting the finger joints; applying a sealing liquid via atomization for end-face damping treatment; performing quantitative adhesive application and stepped butt joint molding; and employing a multi-stage hot-pressing process involving preheating penetration, high-temperature curing, and cooling and pressure holding. Through the above technical solution, this application can achieve the formation of a dense adhesive film at the finger joint interface, significantly improving bonding strength and stability while reducing formaldehyde release.