71results about How to "Improve interfacial bond strength" patented technology

The invention provides an aluminum-based composite material reinforced by nickel-coated silicon carbide through a magnetron sputtering dry method and a preparation process of the aluminum-based composite material, and relates to the technical field of metal-based composite materials and advanced electronic packaging thermal management materials. Comprising the following steps that S1, silicon carbide particles coated with nickel through a magnetron sputtering dry method and aluminum powder are put into a mold to be subjected to compression molding, and an initial blank is obtained; and S2, the initial blank prepared in the step S1 is placed in a re-pressing sintering furnace under the inert gas protection condition, continuous re-pressing is conducted under the temperature condition ranging from the temperature lower than the aluminum melting point by 50 DEG C to the temperature higher than the aluminum melting point by 200 DEG C, and the nickel-coated silicon carbide reinforced aluminum-based composite material obtained through the magnetron sputtering dry method is obtained. The aluminum-based composite material reinforced by magnetron sputtering dry nickel-coated silicon carbide disclosed by the invention is excellent in heat-conducting property and mechanical property and long in service life.

The invention provides a lightweight insulation composite cross arm. The lightweight insulation composite cross arm comprises an insulation core rod, a filler filled in the insulation core rod and an insulation umbrella skirt located outside the insulation core rod, the structure of the insulating core rod is a pipe body formed by modified continuous basalt fibers which are spirally arranged in multiple layers, and resin is adhered to the surfaces of the modified continuous basalt fibers; the structure of the modified continuous basalt fiber is as follows: basalt fiber chips are connected to the surface of the continuous basalt fiber through silica sol; the resin comprises the following raw materials: 100 parts of epoxy resin, 1-5 parts of a silane coupling agent, 5-8 parts of an auxiliary agent, 8-10 parts of basalt fiber chippings, 20-30 parts of a curing agent and 30-50 parts of a solvent. According to the invention, the continuous basalt fibers are modified by the basalt chips, and the basalt chips are used as a bridge, so that the interaction between the continuous basalt fibers and a resin matrix is increased, and the bending modulus and bending strength of the insulating core rod are improved.

The invention relates to the field of waterproof coiled materials, and discloses a modified waterproof coiled material based on a waste high polymer material and a preparation method thereof, and the modified waterproof coiled material comprises 40%-50% of waste thermoplastic polyurethane, 25%-30% of waste rubber powder, 15%-20% of asphalt, 5%-7% of nano-silica, 1%-2% of a silane coupling agent, 3%-5% of tackifying resin and 0.5%-1% of an antioxidant. The modified waterproof coiled material is prepared from waste high polymer materials, nano silicon dioxide is modified by a silane coupling agent and then forms chemical bonding or strong physical adsorption with the surface of a base layer, the interface bonding strength is remarkably improved, meanwhile, the tackifying resin is added, the overall viscosity of the coiled material is further enhanced, and the service life of the coiled material is prolonged. The adhesive can be firmly bonded under various base layer conditions, hollowing and falling phenomena are effectively prevented, resource recycling is realized, dependence on increasingly short raw materials such as traditional petroleum asphalt, SBS and APP is reduced, the production cost is reduced, the market competitiveness of the product is improved, the pressure of waste high polymer materials on the environment is relieved, and the adhesive has good application prospects. The sustainable development concept is met.

The invention relates to the technical field of synthetic fiber paper manufacturing, in particular to meta-aramid paper and a preparation method thereof.The preparation method comprises the steps that para-aramid chopped fibers and potassium hydroxide are added into dimethyl sulfoxide, then water is added, stirring and dispersing are conducted, and nanofiber dispersion liquid is obtained; adding meta-aramid chopped fibers into the nanofiber dispersion liquid for defibering, and uniformly mixing to obtain a meta-aramid chopped fiber dispersion liquid; the preparation method comprises the following steps: continuously and stably adding a meta-aramid polymer liquid, a nanofiber dispersion liquid and a precipitation agent into precipitation equipment, carrying out high-speed shearing to obtain a fibrid, carrying out cooling molding in a water washing pool, and carrying out multi-stage water washing to obtain the meta-aramid fibrid, the meta-aramid chopped fiber dispersion liquid and the meta-aramid fibrid are subjected to defibering and stirring and then subjected to wet forming, squeezing, drying and hot pressing, and the meta-aramid paper is obtained. The meta-aramid paper has higher tensile strength, uniformity, tightness and insulating property, and better internal binding force and surface strength.

The utility model provides a tray foot with a protection structure and a tray, the tray foot with the protection structure is suitable for being arranged at the corner of a bearing plate of the tray to support the bearing plate, and the tray foot comprises a first surface suitable for being in contact with the lower surface of the bearing plate to support the bearing plate, and a second surface suitable for being in contact with the lower surface of the bearing plate; the second surface is opposite to the first surface and is suitable for being in contact with the ground or a bottom plate; the side surface is arranged between the first surface and the second surface; the first protection edge structure is arranged on a part of the edge of the first face, protrudes out of the first face and is suitable for being located on the outer side of the corner of the bearing plate when the first face makes contact with the lower surface of the bearing plate so as to protect the corner of the bearing plate, and therefore damage to the corner of the bearing plate due to collision or impact and the like is prevented. And the attractive appearance and the service life of the bearing plate are prevented from being influenced by damage.

The invention relates to the technical field of synthetic fiber paper manufacturing, in particular to aramid-based heating paper and a preparation method thereof.The preparation method comprises the steps that para-aramid chopped fibers and potassium hydroxide are added into dimethyl sulfoxide, then water is added, stirring and dispersing are conducted, and nanofiber dispersion liquid is obtained; adding carbon fibers and aramid chopped fibers into the nanofiber dispersion liquid for defibering, and uniformly mixing to obtain chopped fiber dispersion liquid; the preparation method comprises the following steps: adding a meta-aramid polymer liquid, a nanofiber dispersion liquid and a precipitation agent into precipitation equipment, carrying out high-speed shearing to obtain a fibrid, carrying out cooling molding in a water washing pool, and carrying out multi-stage water washing to obtain a meta-aramid fibrid; and uniformly mixing the chopped fiber dispersion liquid and meta-aramid fibrid, and then carrying out wet-process papermaking, squeezing drying and hot-pressing treatment to obtain the aramid-based heating paper. According to the preparation method, the carbon fibers and the aramid chopped fibers can be well dispersed, and the prepared aramid-based heating paper has higher uniformity and better mechanical properties and heating performance.

The invention provides an epoxy modified cement-based material, the epoxy modified cement-based material comprises an organic phase structure and inorganic crystals, and the inorganic crystals are radially distributed on the surface of the organic phase structure; the organic phase structure is a spherical or sphere-like structure with the diameter of 3-15 microns; the inorganic crystal is of a needle-shaped, rod-shaped or sheet-shaped structure with the length being 0.3-3 microns and the diameter being 0.05-0.5 microns. The epoxy modified cement-based material disclosed by the invention shows good adhesion and dispersion resistance under water or in a humid environment, can realize rapid underwater construction, and keeps stable performance for a long time under harsh conditions such as a marine environment and a humid environment; the engineering requirements of multiple fields such as building structure repairing, underwater repairing, rapid first-aid repair, ocean protection and road and bridge engineering are met, and the integration of high strength, high toughness, strong interface bonding and long-acting durability is realized.

The application discloses high-strength composite cement blanket and belongs to the technical field of civil engineering composite materials. The application improves the three-dimensional fabric structure: a three-dimensional weaving is adopted to form a top layer, a middle layer and a bottom layer, wherein the middle layer is formed by a honeycomb three-dimensional structure formed by interweaving vertical fiber filaments and horizontal oblique fiber filaments which are arranged obliquely relative to the vertical fiber filaments; the vertical fiber filaments connect the top layer and the bottom layer; and the horizontal oblique fiber filaments pass through the vertical fiber filaments in an S-shaped wiring mode multiple times to form limiting knots which are distributed in the top layer, the middle layer and the bottom layer to form an overall tensile strength reinforcing structure. The three-dimensional fabric can be combined with a "two cloth and one film" protective layer and a solidifiable composite material containing gold steel sand. The application realizes isotropic reinforcement through the honeycomb structure and builds a mechanical occlusal interface through the S-shaped limiting structure, thereby significantly improving the bending strength, interface adhesion and waterproof durability of the cement blanket, and the application is suitable for slope protection, trench lining and temporary road paving engineering and the like.

The invention discloses a polypropylene film suitable for a film lamination method and a preparation method of the polypropylene film. The polypropylene film comprises the following components in parts by weight: 85.6-91.85 parts of polypropylene; 4-7 parts of long-chain branched polypropylene; 4-7 parts of a compatibilizer; 0.05 to 0.1 part of a nucleating agent; and 0.1 to 0.3 part of an antioxidant. Firstly, polypropylene is selected, so that the wettability of a melt to carbon fibers is effectively improved, and the filling defect caused by high viscosity of a traditional material is overcome; and secondly, the compatibilizer is introduced to form firm chemical bonding with the fiber surface, so that the interface bonding strength is greatly enhanced. And finally, by combining a precise extrusion and casting process, the prepared polypropylene film is uniform in thickness, excellent in interface performance and suitable for a film lamination method.

The application discloses a kind of optical cable surface modification method, modified optical cable and concrete monitoring system.The optical cable surface modification method includes the following steps: surface roughening treatment is carried out to the coating layer of optical cable, and surface roughened optical cable is obtained;Nanometer material dispersion liquid is coated to the surface of surface roughened optical cable, and modified optical cable is obtained after solidification treatment.The application constructs micro-nano rough structure on the surface of optical cable coating layer by the synergistic modification strategy of "surface roughening+nanometer material loading", and loads active nanometer material, so that modified optical cable can induce hydration product to be generated densely at interface after being buried in concrete, significantly improve interface bonding strength, reduce interface porosity and thermal resistance, so that high-precision sensing and long-term monitoring stability of stress, strain and temperature are realized.

The present application relates to the technical field of ceramic coating, especially to a micro-nano structure ceramic coating and its application on the reaction furnace of zircon sand boiling chlorination method, aiming at solving the problems of weak bonding force between the existing protective coating and the substrate, poor thermal shock resistance and easy failure in long-term high-temperature chlorine environment; the present application constructs a nano-wire reinforced micro-nano structure transition layer on the surface of porous corundum brick substrate in situ, and sequentially constructs a lanthanum phosphate bonding layer and a yttrium stabilized zirconium oxide barrier layer on the transition layer; the design utilizes the mechanical anchoring effect of micro-nano structure and the strong chemical bonding ability of lanthanum phosphate to realize the firm combination of the coating and the substrate; the dense characteristics of the zirconium oxide layer provide ultimate protection; the method significantly improves the overall anti-peeling ability and long-term corrosion resistance of the coating system.

The present application relates to the technical field of resin, in particular to a conductive polypropylene composite material and a preparation method thereof.In view of the problems of poor processing fluidity, easy shear damage of conductive network and deterioration of mechanical properties caused by high filling of conductive filler in the prior art, the present application realizes the low volume resistivity, high melt flow rate and excellent mechanical toughness by the solid phase pre-coating technology, and effectively balances the conductivity, processability and strength.

The invention relates to the technical field of preparation of concrete, in particular to LC3-basalt fiber regenerated block concrete and a preparation method thereof.The preparation method comprises the following preparation steps that S1, LC3 cement, regenerated blocks, natural sand and gravel are poured into a stirrer to be subjected to uniform dry mixing, and a dry mixture is obtained; s2, adding water, a modified water reducer and a performance modifier into the dry mixture, performing wet mixing, uniformly scattering modified basalt fibers during wet mixing, and performing uniform stirring to obtain a wet mixture; and S3, pouring the wet mixture into a test mold, standing at room temperature, demolding, and curing for 26-28 days to obtain the LC3-basalt fiber regenerated block concrete. Through the synergistic effect of the modified basalt fiber, the modified water reducer and the performance modifier, the compressive strength, the strength retention rate after high temperature and the tensile strength of the concrete are remarkably improved, and chemical activation and densification after the regenerated block is added are achieved.

This invention discloses a self-healing, anti-corrosion, and cooling coating and its preparation method. The preparation method includes: TiO2 surface activation treatment; in-situ construction of a mesoporous silica shell and loading of a corrosion inhibitor; surface silane modification; and coating and curing after blending the obtained filler with resin and curing agent. The coating consists of a polymer resin matrix and a multifunctional core-shell nanocomposite material uniformly dispersed therein; the composite material has a three-level structure of core-shell-interface layer: titanium dioxide as the core, mesoporous silica loaded with corrosion inhibitor as the functional shell, and a silane coupling agent as the interfacial compatibility layer. Through multi-level structural design, this invention enables a single filler to simultaneously achieve high solar reflectance, high infrared emission, and intelligent release of corrosion inhibitors. The coating combines a physical barrier, active corrosion prevention, and radiation cooling triple protection mechanism, and can be widely used for long-term protection of outdoor metal or non-metal substrates.

The invention relates to the technical field of synthetic fiber paper manufacturing, in particular to para-aramid paper and a preparation method thereof, and belongs to the technical field of synthetic fiber paper manufacturing. The preparation method comprises the following steps: adding para-aramid chopped fibers and potassium hydroxide into dimethyl sulfoxide, then adding water, and stirring and dispersing to obtain nanofiber dispersion liquid; adding para-aramid chopped fibers into the nanofiber dispersion liquid for defibering, and uniformly mixing to obtain para-aramid chopped fiber dispersion liquid; the preparation method comprises the following steps: continuously and stably adding a meta-aramid polymer liquid, a nanofiber dispersion liquid and a precipitation agent into precipitation equipment, carrying out high-speed shearing to obtain a fibrid, then carrying out cooling molding in a water washing pool, and carrying out multi-stage water washing to obtain the meta-aramid fibrid, and carrying out wet papermaking on the para-aramid chopped fiber dispersion liquid and meta-aramid fibrid to obtain the para-aramid paper. The para-aramid paper is higher in mechanical property, good in uniformity and high in density, and the glue penetration risk in the process of preparing honeycombs from the para-aramid paper is reduced.

The invention relates to the technical field of composite electroplating, in particular to an electroplating method for preparing a high-wear-resistance self-lubricating plating layer, which comprises the following steps: firstly, carrying out pretreatment of oil removal and acid pickling activation on a metal workpiece; then preparing a nano composite nickel plating solution in which a nickel plating basic solution contains a nano particle composite phase subjected to pre-dispersion treatment, and the total concentration of composite particles is 10-60g / L; then the dispersion stability of the nano-composite nickel plating solution is maintained in a circulating filtration and mechanical stirring combined mode, and the pretreated workpiece is electroplated; and finally, after electroplating is completed, the workpiece is cleaned and dried. According to the electroplating process for preparing the nickel-based composite coating with high wear resistance and low friction coefficient, the pulse current is adopted, and the high instantaneous current density and turn-off time of the pulse current are utilized, so that desorption and rearrangement of adsorbed particles are facilitated, uniform embedding of the particles is promoted, nickel matrix crystal grains are refined, and the compactness and comprehensive mechanical properties of the coating are further optimized.

This invention relates to the field of brass material technology, specifically a high-strength, high-toughness brass material and its preparation method. A porous oxide film is pre-formed on the brass surface through plasma electrolytic oxidation. A double-bonded silver-loaded graphene oxide-doped oxide film is then constructed on the brass surface. A photocurable sealing coating is then prepared for sealing. In the photocurable sealing coating, double-bonded silver-loaded graphene oxide and modified MXene are introduced as fillers. MXene is first thiolated with 3-mercaptopropyltriethoxysilane, and then grafted with a double-bonded dibenzimidazole ring derivative via photo-clicking to obtain modified MXene. A vinyl-terminated polyurethane is used as a crosslinking agent, and a complex crosslinking network is constructed using a blend of o-phenylphenoxyethyl acrylate, butyl acrylate, glycidyl methacrylate, and octadecyl acrylate as acrylic monomers. A diluent and solvent are introduced to extend the service life of the brass material.

The invention relates to the technical field of building materials, and discloses artificial coarse aggregate and a preparation method thereof. The artificial coarse aggregate is prepared from the following raw materials in parts by weight: 100 parts of sea sand; 12 to 20 parts of a binder; 0.06 to 0.18 part of a coalescing agent; 12 to 20 parts of water; wherein the binder is an acrylate copolymer emulsion with the solid content of 50%, and the coalescing agent is propylene glycol monobutyl ether. The preparation method comprises the steps of raw material pretreatment and mixing, adhesive solution preparation, rolling agglomeration granulation, curing maintenance, screening and the like. By controlling the particle size grading of the sea sand, the use amount of the binder and process parameters, the prepared artificial coarse aggregate is in an irregular polygonal form, has a rough and porous surface, has proper bulk density, cylinder compressive strength and water absorption, and can meet the use requirements of C25-C35 grade lightweight concrete. According to the method, efficient utilization of sea sand resources is achieved, the process is simple, energy consumption is low, and the method has good engineering application prospects.

The invention discloses an efficient environment-friendly curing agent for marine soft soil and a preparation method and application thereof, and belongs to the technical field of soft soil curing. The salt-resistant concrete comprises the following components in percentage by mass: 55%-70% of a core gel system, 8%-15% of a composite excitation system, 5%-10% of a salt-resistant modification system and 10%-20% of a reinforced filling system, the core gelling system is composed of steel slag micro powder, slag powder and desulfurized gypsum; the composite excitation system is composed of modified fly ash and a composite alkali activator; the salt-resistant modification system is composed of a chitosan grafted acrylamide copolymer and zeolite powder; the reinforced filling system is composed of polypropylene fibers, nano calcium carbonate and construction waste regenerated micro powder. The curing agent is a special curing agent system for marine soft soil with strong adaptability, high curing efficiency, good durability and essential environmental protection.

This invention belongs to the field of inorganic cementitious materials technology, and discloses a magnesium oxysulfate gel modifier and its modified gel preparation method. The modified magnesium oxysulfate gel contains silica fume, organosilicon waterproofing powder, humic acid, functional additives, nanocomposite particles, sucrose, and ethylene glycol monobutyl ether. After modification, the mechanical strength of the magnesium oxysulfate gel is improved, and its fire resistance, environmental resistance, and antibacterial properties fully meet the standards, solving the pain points of traditional magnesium oxysulfate materials. It can be used in building components such as fireproof door core panels, firewalls, and fireproof partitions. Fireproof door panels made using the modified gel achieve a fire resistance limit of Class A, with improved interfacial bonding strength, excellent impact resistance and weather resistance, and are suitable for multiple scenarios. The entire process is free of VOCs exceeding the standard, and combustion produces no toxic gases, meeting green building material standards and contributing to the development of ultra-low energy consumption buildings. It is suitable for low-temperature and frigid regions, high-temperature industrial environments, high-humidity antibacterial scenarios, and projects with high environmental protection requirements. It constructs a four-dimensional innovation system of "nanoparticle micro-enhancement - functional additive environmental adaptation - traditional component performance optimization - door panel structure synergy", realizing integrated performance improvement of "materials - core panels - door panels".

The invention relates to the technical field of battery shell materials, and particularly discloses a high-temperature-resistant fireproof epoxy material for a composite battery shell material. The flame-retardant epoxy resin paint is prepared from the following raw materials: 20-30% of epoxy resin, 5-15% of a diluent, 35-45% of a flame retardant, 10-15% of polyamine, 1-5% of color paste and 1-2% of a release agent. The high-temperature-resistant flame-retardant glass fiber reinforced plastic is good in impact resistance and high temperature resistance, has good mechanical performance and manufacturability, is low in curing shrinkage rate, meets UL 94V0 fireproof combustion performance and is high in glass transition temperature.

The application discloses a high water pressure resistant, low temperature flexible waterproof and moisture permeable composite fabric and a preparation method thereof. The modified nano silicon dioxide has a nano scale effect, can efficiently shield ultraviolet radiation, and has chemical stability, endowing the material with inherent ability to resist external salt corrosion, and builds a double barrier of resistance to ultraviolet and salt corrosion in the fiber. The micro-nano surface topology of the pine needle shell layer increases the effective exposed area of the modified nano silicon dioxide, optimizes the functional interface, and the axial hollow cavity forms a stress buffer channel in the fiber, reduces the damage of external mechanical stress to the modified nano silicon dioxide dispersion structure to maintain uniform distribution. The high efficiency shielding and chemical resistance of the modified nano silicon dioxide resist ultraviolet penetration and salt erosion, and the micro-nano structure and hollow cavity of the pine needle shell layer maintain low temperature flexibility, and realize the balance of high water pressure resistance, waterproof and moisture permeability and resistance to ultraviolet and salt corrosion.

The application provides a polymethyl methacrylate product and a preparation method thereof. The preparation method of the polymethyl methacrylate product comprises the following steps: S1. mixing a resin matrix, a toughening agent, an antioxidant and a light stabilizer to obtain a mixture; the resin matrix comprises a polymethyl methacrylate resin; the toughening agent comprises a core-shell structure toughening agent and a polyester-based toughening agent; the core-shell structure toughening agent comprises a core and a shell layer; the core comprises polybutyl acrylate, and the shell layer comprises polymethyl methacrylate; S2. melt blending, extruding and granulating the mixture, and drying, injection molding, cooling and annealing. In the application, the core-shell structure toughening agent and the polyester-based toughening agent can synergistically improve the toughening effect.

The invention belongs to the technical field of light building materials, and particularly relates to a preparation method of normal-temperature mixed asphalt concrete. The preparation method of the normal-temperature mixed asphalt concrete comprises the following steps: uniformly mixing 90-100 parts by weight of aggregate, 10-20 parts by weight of limestone mineral powder and 6-12 parts by weight of a fiber material at room temperature, then adding 2-4 parts by weight of a polycarboxylic acid water reducer and 1-5 parts by weight of water, stirring for 20-30 minutes, then adding 20-30 parts by weight of carboxylated cationic emulsified asphalt, and stirring at normal temperature to obtain a mixture; and pouring the mixture to obtain the normal-temperature mixed asphalt concrete. According to the invention, the dynamic stability is effectively improved while good splitting strength is ensured, and the method can be applied to light building materials.

The invention discloses a preparation method for constructing a multistage micro-nano heterostructure based on combination of a laser melting deposition process and a laser shock peening means, which comprises the following steps of: printing by using dry TC4 alloy powder, accumulating a printed TC4 metal printing layer to form a TC4 metal micron layer, performing low-power laser shock peening on part of the TC4 metal micron layer to form a TC4 metal submicron layer, and forming the multistage micro-nano heterostructure. A TC4 metal printing layer is printed on the submicron layer and subjected to high-power laser shock peening to form a TC4 metal nano layer, a TC4 metal printing layer is printed on the nano layer and subjected to low-power laser shock peening to form a TC4 metal submicron layer, printing and cyclic operation are continued on the submicron layer to form a sample, and the sample is obtained through annealing treatment. According to the preparation method disclosed by the invention, a micron layer-nano sandwich composite layer-micron layer multi-stage micro-nano heterostructure is formed, crack propagation is effectively hindered, and the elongation of the material is improved, so that alloy strength and plasticity synergistic strengthening is realized.

The present application proposes a grouting material based on covalent organic framework energy absorption, and its preparation method and application, wherein the grouting material based on covalent organic framework energy absorption includes the following components in parts by weight: 4-6 parts of covalent organic framework single crystals, 0.8-1.2 parts of early strength agent, 0.4-0.6 parts of coagulant, 0.4-0.6 parts of toughening agent, 0.24-0.36 parts of water retention agent, 0.8-1.2 parts of reinforcing agent, and 80-120 parts of ferroaluminate clinker gelling material. The grouting material based on covalent organic framework energy absorption of the present application uses covalent organic framework single crystals in combination with early strength agent, coagulant, toughening agent, water retention agent, reinforcing agent and ferroaluminate clinker gelling material, which can reduce the production cost of the grouting material while improving the impact resistance, mechanical properties, bonding strength and fluidity of the grouting material.

The invention provides a carbon fiber sizing method, and belongs to the technical field of carbon fibers, the carbon fiber sizing method comprises the following steps: S1, providing a waterborne epoxy-polyurethane hyperbranched sizing agent; s2, diluting the sizing agent with deionized water until the concentration of the sizing agent is 1.5 wt%-3.5 wt%; s3, enabling the carbon fiber to be in contact with the diluted sizing agent, and performing sizing coating; and S4, the carbon fibers coated with the sizing agent are subjected to drying and heat treatment, and a sizing agent coating is formed on the surfaces of the carbon fibers. According to the invention, an epoxy-polyurethane hybrid system and a hyperbranched structure are combined, and a double-reaction-activity bridging agent is combined, so that the rigidity and high reaction activity of epoxy resin and the flexibility and toughness of polyurethane are combined through molecular design, and a hyperbranched interpenetrating network structure is constructed; effective improvements are achieved in the aspects of solving the surface inertia of the carbon fiber and improving the balance between the interface bonding strength and toughness of the composite material.

This invention discloses an organo-bentonite flame retardant synergist and its preparation method, belonging to the field of flame retardant materials technology. The preparation method includes: preparing calcium-based bentonite into a slurry, adding sodium carbonate for sodium purification; subjecting the purified slurry to high-pressure homogenization and flake removal; adding an organic modifier composed of octadecyl quaternary ammonium salt and dioctadecyl quaternary ammonium salt to the flaked slurry for intercalation modification, drying and dispersing; and adding end-functionalized polysiloxane to the organo-bentonite powder for surface coating treatment, thus obtaining the final product. The organo-bentonite flame retardant synergist prepared by this invention has a nanoscale layered structure and excellent compatibility with polyolefin matrices. When this synergist is combined with aluminum hydroxide for use in polyolefin composites, it can reduce processing torque, increase tensile strength, improve the limiting oxygen index to achieve UL-94V-0 rating, and simultaneously promote the formation of a continuous and dense expanded char layer, effectively inhibiting dripping.

The application provides a carbon fiber liquid-phase oxidation device and a carbon fiber production system, and belongs to the technical field of carbon fiber manufacturing. The carbon fiber liquid-phase oxidation device comprises an oxidation tank and a conveying unit. An oxidation tank liquid inlet is arranged on a first side wall of the oxidation tank, and an oxidation tank liquid outlet is arranged on a second side wall opposite to the first side wall of the oxidation tank. The oxidation tank liquid inlet and the oxidation tank liquid outlet are respectively located at two ends in the length direction of the oxidation tank, and are communicated by a circulating pump. The conveying unit is configured to convey the carbon fiber along the length direction of the oxidation tank, and to immerse the carbon fiber in the oxidizing solution in the oxidation tank during the conveying process. The carbon fiber liquid-phase oxidation device can effectively improve the problem of poor uniformity of the concentration of the oxidizing solution, so as to obtain a good surface pretreatment effect, and then make the carbon fiber after the sizing treatment have excellent interfacial bonding strength with the resin matrix.

The invention discloses a phase-convertible physical and chemical hybrid cross-linked high-silica resin-based composite material and a preparation method thereof. The material is subjected to primary transformation (50-100 DEG C): a crystalline region in a resin matrix is melted, a large amount of hydrogen bonds are dissociated, the modulus of the material is remarkably reduced, the material becomes flexible, and shape memory, small-scale damage repair (such as recess recovery) or interlayer welding can be carried out. And advanced transformation (gt; 130 DEG C): dynamic covalent bonds (such as ester exchange and DA reverse reaction) start to activate to realize topological rearrangement. And at the temperature, the whole composite material part can be subjected to large-scale remodeling and recycling. 500 DEG C in high-temperature service: when meeting open fire or an ultrahigh-temperature environment, the resin matrix is quickly carbonized, and forms a compact Si-O-C ceramic protection layer together with the high-silica reinforcement, so that excellent ablation resistance and heat insulation performance are achieved. The intelligent network provides a favorable molecular structure basis for active ceramic forming at high temperature.