48 results about "Self-healing material" patented technology

The invention relates to an intelligent permeation grouting process and device for concrete crack self-repairing. The intelligent permeation grouting process and device are suitable for crack detection and repairing of a newly-built concrete structure. The device comprises a blood vessel network embedded into concrete, a crack detection sensor, a control module, a pumping module and a self-repairing material storage module, and automatic detection and repairing of cracks are achieved. The technological process comprises crack detection, data analysis, grouting parameter determination, material injection and repair monitoring. Through the automation and intelligence technology, the repairing efficiency and precision are remarkably improved, and the device is suitable for large structures such as bridges and tunnels.

The invention belongs to the technical field of ocean engineering materials, and particularly relates to an underwater concrete self-repairing material containing dynamic disulfide bonds as well as a preparation method and application of the underwater concrete self-repairing material. The underwater concrete self-repairing material containing the dynamic disulfide bond comprises the following components in parts by weight: 50-70 parts of a hardening agent which is an epoxy prepolymer containing the dynamic disulfide bond; the water repellent agent comprises 20-35 parts of a curing agent and 1-3 parts of an accelerant. According to the underwater concrete self-repairing material containing the dynamic disulfide bonds, the epoxy prepolymer containing the dynamic disulfide bonds serves as a main network, the epoxy prepolymer is broken under the action of external force, and then new covalent bonds can be formed through spontaneous recombination to repair microcracks.

The invention discloses a self-repairing material for electronic device packaging and a preparation method and a packaging method thereof, and belongs to the technical field of electronic device packaging. The self-repairing material comprises the following components: a dynamic reversible chemical bond network formed by a DA bond prepolymer and a hydrogen bond donor in a synergistic manner, boron nitride nanosheets and carbon quantum dots, adding boron nitride nanosheets and carbon quantum dots into the DA bond prepolymer, and fully dispersing; then adding a hydrogen bond donor, and fully stirring to obtain a self-repairing material; spraying a self-repairing material on the surface of the substrate to form a thick packaging layer, curing to form a three-dimensional interpenetrating network structure, and packaging the electronic device; according to the invention, the packaging layer has a rapid self-repairing capability and supports efficient repair; the material has high thermal conductivity, mechanical strength and thermal expansion matching with an LED chip; the self-repairing process does not need high temperature or complex equipment, and is compatible with the existing packaging production line.

The invention belongs to the technical field of coal mine machinery, and particularly relates to a self-repairing mining vertical chain connecting ring and a manufacturing method thereof.The chain connecting ring takes 23MnNiMoCr54 alloy steel as a base material and is made of a steel billet added with self-repairing material components; the self-repairing material comprises nano-particles, shape memory alloy particles and a catalyst. According to the mining vertical chain connecting ring, the self-repairing material is added on the original basis, so that the chain connecting ring automatically repairs surface and internal damage under the complex working condition environment of a mine, the service life of the chain connecting ring is effectively prolonged, and compared with a traditional chain connecting ring, the service life can be prolonged by 30%-50%. The 23MnNiMoCr54 alloy steel is used as a base material, self-repairing material components and a special preparation process are combined, the original excellent mechanical properties such as high strength and high toughness of the chain connecting ring are guaranteed, meanwhile, the chain connecting ring is endowed with the self-repairing characteristic, and good comprehensive performance is achieved.

The invention discloses a high-altitude tunnel lining concrete damage self-repairing material and a preparation method thereof, and the self-repairing material is prepared by doping a microcapsule and a conductive filler in a specific proportion into a traditional concrete matrix, the concrete comprises the following components: cement, fine aggregate, coarse aggregate, water, microcapsules I, microcapsules II, nano silicon dioxide, silica fume, carbon fibers and polypropylene fibers. According to the invention, a dual repairing system of the microcapsule I and the microcapsule II is innovatively adopted. The microcapsule I can repair large cracks (the width is larger than or equal to 0.2 mm), and the microcapsule II aims at small cracks (the width is smaller than 0.2 mm). The dual mechanism ensures comprehensive repair of cracks with different sizes, effectively prevents invasion of moisture and harmful substances, and remarkably improves the durability of the concrete. The microcapsule can be rapidly broken and release the repairing agent when the crack is generated, and the repairing agent can be cured in a short time, so that the crack is effectively prevented from further expanding, and the risk of structural damage is reduced.

This invention relates to the field of concrete technology, specifically to a self-healing concrete material, its preparation method, and its application. The self-healing concrete material is a core-shell structured microcapsule, comprising a core material and a wall material. The wall material wraps around the core material. The core material comprises the following raw materials in parts by weight: 4-6 parts β-cyclodextrin, 12-18 parts sepiolite powder, 5-10 parts shellac powder, 25-35 parts sulfoaluminate cement, 10-15 parts magnesium oxide, 12-16 parts sodium silicate aqueous solution, and 14-17 parts calcium carbonate. The wall material comprises the following raw materials in parts by weight: 20-30 parts polyvinyl alcohol, 20-30 parts ethyl cellulose, 15-25 parts bentonite, and 25-35 parts corn starch. The mass ratio of the core material to the wall material is 6-7:3-4. The core material of the self-healing concrete material provided by this invention, comprising β-cyclodextrin, sepiolite powder, and shellac powder, can improve the problems of slow repair speed and poor reinforcement effect of self-healing materials.

The invention relates to the field of building materials, and particularly discloses a self-repairing special concrete and a preparation method thereof, the self-repairing special concrete comprises the following raw materials by weight: 40-80 parts of cement, 60-100 parts of gravel, 70-90 parts of machine-made sand, 15-25 parts of an admixture, 20-30 parts of a self-repairing material, 2-6 parts of an auxiliary agent, and 20-45 parts of water; the self-repairing material is prepared by the following steps: uniformly dispersing a repairing material in a water-soluble coating material, adding a wetting agent, shearing, emulsifying and homogenizing to form a stable emulsion, and spray-drying to form microcapsules; adding the microcapsules into a polylactic acid solution, carrying out ultrasonic oscillation and mixing, and emulsifying, curing and centrifuging the mixed solution to obtain the self-repairing material. The preparation method of the self-repairing special concrete comprises the following step: uniformly stirring and mixing the cement, the broken stones, the machine-made sand, the admixture, the self-repairing material, the auxiliary agent and the water to obtain the self-repairing special concrete. The obtained concrete can automatically repair cracks and cracks, and the repair effect is good.

The invention belongs to the technical field of building materials, and particularly relates to an anti-seepage self-repairing material and a preparation method and application thereof. According to the material, graded porous SiOmicrospheres with functionalized surface epoxy groups are taken as a carrier, are loaded in order through space, and are coated with a hydrophobic dynamic repairing agent and a mineral reinforced precursor at the same time. A main chain of the hydrophobic dynamic repairing agent contains a dynamic disulfide bond, so that the hydrophobic dynamic repairing agent has rapid hydrophobic plugging and room-temperature self-healing capabilities; the mineral reinforced precursor can generate secondary C-S-H gel in the cracks, and long-term reinforcement is achieved. The two realize efficient cascade repair under the adjacent action of the carrier space, and the epoxy group on the carrier surface and the cement matrix form strong chemical bonding. After the material is doped into concrete, the self-repairing efficiency and the long-term durability of cracks can be remarkably improved, the material is particularly suitable for concrete structures in water conservancy, ocean and other harsh and humid environments, and the problems that an existing repairing technology product is poor in durability and an interface is prone to falling off are solved.

This invention relates to the field of cement-based engineering materials technology, and in particular to a self-healing plugging material and its preparation method. The material uses calcined magnesium oxide, lightly calcined magnesium oxide, modified silica fume, and magnesium chloride as raw materials to form a heat-resistant self-healing material. Hollow polyvinyl alcohol fiber is used as a carrier, and the outer layer is treated with a silane coupling agent to prepare the self-healing fiber. Combined with calcium carbonate whiskers, the plugging material is toughened, its crack resistance is improved, and microcracks are self-repaired. It can be used for high-temperature cementing and plugging in environments of 150-180℃.

An electronic device may have a hinge that allows the device to be flexed about a bend axis. A display may span the bend axis. To facilitate bending about the bend axis without damage, the display may include a display cover layer with a flexible portion. The flexible portion of the display cover layer may be interposed between first and second rigid portions of the display cover layer. The display cover layer may also include a layer with self-healing properties. The layer of self-healing material may be formed across the entire display cover layer or may be formed only in the flexible region of the display cover layer. The display cover layer may include a layer of elastomer in the flexible region of the display cover layer for increased flexibility. Self-healing may be initiated or expedited by externally applied heat, light, electric current, or other type of external stimulus.

This invention discloses a method for preparing a high-salinity intelligent responsive cement-based anti-salt corrosion and self-healing material. The method includes constructing an intelligent responsive base by preparing a microcapsule self-healing agent and regulating the ZIF-8 preparation process, followed by in-situ growth of Mg-Al-LDH and functional film coating. This achieves the synergistic functions of active anti-salt corrosion, efficient and stable self-healing, promoting cement hydration, and regulating ion adsorption in high-salt environments. This invention can accurately sense changes in high-salt environments and intelligently release the self-healing agent, realizing the dual functions of anti-salt corrosion and self-healing in cement-based materials. It can be widely applied in cement-based engineering projects in high-salt environments such as marine and salt lake environments, extending the service life of concrete structures.

A sensor cover includes a base layer, a cover layer disposed on the base layer and made of a self-healing material, and a heating film disposed between the base layer and the cover layer and configured to generate heat. The base layer and the cover layer are integrated with each other through a double injection molding process.

The application provides a microcapsule self-repairing material constitutive curve prediction method and device, and relates to the technical field of tunnel and underground engineering materials, and aims to solve the problem that the mesoscopic mechanics model cannot reflect and predict the softening stage after the peak value of a cement-based material in the prior art. The method comprises the following steps: if the self-repairing concrete material is a conventional concrete material, calculating the constitutive curve of the conventional concrete material under tensile load in a plane strain condition; if the self-repairing concrete material is a microcapsule self-repairing concrete material containing a strong healing agent, calculating the constitutive curve of the microcapsule self-repairing concrete material containing the strong healing agent under tensile load in a plane strain condition; and if the self-repairing concrete material is a microcapsule self-repairing concrete material containing a weak healing agent, calculating the constitutive curve of the microcapsule self-repairing concrete material containing the weak healing agent under tensile load in a plane strain condition. The microcapsule self-repairing material constitutive curve prediction device is applied to the microcapsule self-repairing material constitutive curve prediction method.

The invention discloses a self-repairing composite material as well as a preparation method and application thereof, and belongs to the technical field of self-repairing materials. According to the self-repairing composite material provided by the invention, thermoplastic polyamide particles with the average particle size of less than 50 microns are distributed between two adjacent layers of carbon fiber / epoxy resin materials in a laying density range of 45-80mg / 100cm < 2 >, and liquid defects are not introduced, so that relatively high I-type interlaminar fracture toughness repairing efficiency is obtained, and relatively high I-type post-healing interlaminar fracture toughness is maintained at the same time; and the preparation method is simple, convenient and efficient, and has good market prospects and industrial application prospects.

The application provides a light response self-repairing material and a preparation method and application thereof, and relates to the technical field of self-repairing materials.The light response self-repairing material takes a photosensitive polymer as a matrix, modified nanosilica and a plant extraction adhesive are wrapped in the self-repairing material, under ultraviolet irradiation, the photosensitive polymer is softened and the modified nanosilica and the plant extraction adhesive are released, the plant extraction adhesive expands when meeting water, and a silica gel network is formed by combining the modified nanosilica, so that cracks are rapidly filled; meanwhile, the toughening fibers in the silica gel network can effectively improve the strength of the repaired crack gap. In addition, it has been verified that the light response self-repairing material can achieve good repair effect in low-temperature or high-salinity water, and can be widely applied to the preparation process of river revetment surface coating.

This application relates to the field of self-healing materials, specifically disclosing a high-toughness self-healing functional material, its preparation method, and its applications. This self-healing functional material is a supramolecular elastomer formed by in-situ free radical polymerization of the tetrad hydrogen-bonded monomer UPy-EMA, a host-guest inclusion complex, and an acrylate monomer under the action of a crosslinking agent and an initiator. The high-toughness self-healing functional material provided in this application is the first to effectively integrate multiple functions of "strength, toughness, self-healing, conductivity, and antibacterial properties," ultimately obtaining a self-repairing material that combines high strength and toughness, rapid self-healing at room temperature, conductivity, and antibacterial properties, with broad application prospects.

The present application relates to the technical field of building materials, and particularly relates to a solid waste-based Yellow River sediment gelatinized material and a preparation method of artificial flood-prevention prepared stone. The solid waste-based Yellow River sediment gelatinized material comprises the following raw materials in parts by weight: 300-500 parts of Yellow River sediment, 80-130 parts of cinder ash, 40-80 parts of steel slag, 20-50 parts of alunite tailings, 25-55 parts of mirabilite gypsum, 0.5-1.5 parts of crack self-repairing material, and 1-3 parts of workability regulator. The artificial flood-prevention prepared stone prepared by the method has excellent mechanical properties and erosion resistance, can reduce carbon emissions and improve ecological properties, and makes the Yellow River sediment realize resource utilization.

The invention relates to the technical field of hydraulic engineering, in particular to a hydraulic concrete crack self-repairing material based on double capsules. The hydraulic concrete crack self-repairing material based on the double capsules is prepared by the following steps: putting the cement, the fly ash, the slag powder, the fine aggregate, the coarse aggregate and the double-microcapsule system into a stirrer according to the formula ratio, carrying out dry mixing for 1-2 minutes until the mixture is uniform, then adding the water reducing agent and water, and stirring for 3-5 minutes to obtain the hydraulic concrete crack self-repairing material based on the double capsules. The prepared hydraulic concrete crack self-repairing material based on the double capsules is high in repairing efficiency, the repairing opportunity is accurately controlled, the repaired concrete is good in strength recovery, and construction is convenient.

The invention discloses a low-temperature repair-resistant reinforced anti-cracking additive and a preparation method thereof, and belongs to the technical field of concrete repair materials. The additive is composed of a matrix component, a functional additive and an active repairing component according to the mass ratio of 80: (5-10): (5-10). The matrix component comprises sulphoaluminate cement clinker and composite mineral filler; the functional additives comprise modified nano silicon dioxide, polymer rubber powder, an organic anti-freezing agent and anti-cracking fibers; the active repairing component comprises a microbial capsule type self-repairing material and an internal curing agent, wherein a microbial capsule comprises sporosarcina pasteurii and bacillus urealyticum. Through the synergistic effect of the microbial capsules and the modified nano silicon dioxide, efficient self-repairing of concrete microcracks in a low-temperature freeze-thaw environment is achieved, meanwhile, the early strength, freezing resistance, crack resistance and durability of concrete are remarkably improved, and the concrete is especially suitable for protection and repairing of concrete structures in alpine regions.

The invention belongs to the technical field of lubricating oil additives, and provides an industrial lubricating oil extreme-pressure anti-wear agent containing a self-repairing material and a preparation method of the industrial lubricating oil extreme-pressure anti-wear agent. The preparation method comprises the following steps: firstly, preparing a solution containing a multi-metal complex and a phosphate precursor solution, forming an anti-wear active component through the synergistic effect of the multi-metal complex, introducing a phosphate system, and mixing the multi-metal complex solution, the phosphate precursor solution and other components to form an inner core phase; a shell phase is formed through a resin precursor and a modifier, a microcapsule structure containing multiple metals and phosphate components is prepared through further emulsification, and active substances are released under working conditions to reduce friction and abrasion; the preparation method comprises the following steps: preparing an MOF material, functionalizing the MOF material to enable the MOF material to have anti-wear performance, preparing an MOF composite material with lubrication enhancement characteristics by introducing a modifier containing multifunctional groups and a composite component, and mixing microcapsules with the functionalized MOF composite material to obtain the industrial lubricating oil extreme pressure anti-wear agent containing the self-repairing material.

This invention belongs to the field of lubricant additive technology and provides an industrial lubricant extreme pressure anti-wear agent containing self-healing materials and its preparation method. First, a solution containing multi-metal complexes and a phosphate precursor solution are prepared. Through the synergistic effect of the multi-metal compounds, an active component with anti-wear properties is formed. This is introduced into a phosphate system, where the multi-metal complex solution and the phosphate precursor solution are mixed to form a core phase. A shell phase is formed using a resin precursor and a modifier. Further emulsification prepares a microcapsule structure containing multi-metal and phosphate components, releasing active substances under operating conditions to reduce friction and wear. Subsequently, MOF materials are functionalized to acquire anti-wear properties. By introducing modifiers and composite components containing multifunctional groups, a MOF composite material with lubrication-enhancing properties is prepared. Finally, the microcapsules are mixed with the functionalized MOF composite material to obtain an industrial lubricant extreme pressure anti-wear agent containing self-healing materials.

This application provides a self-healing material, preparation method, surge arrester, and system for surge arresters. The self-healing material has a three-layer core structure; from the inside out, the three-layer core structure includes a temperature-sensitive / force-sensitive dual-response film, an electric field-thermal conversion layer, and a repair layer. The temperature-sensitive / force-sensitive dual-response film exposes the electric field-thermal conversion layer when the ambient temperature reaches a threshold and / or the external mechanical stress reaches a preset stress threshold. The electric field-thermal conversion layer heats up upon contact with the distorted electric field at the insulation damage site of the surge arrester after exposure. The repair layer allows a repair agent to penetrate into the insulation damage area of ​​the surge arrester at a preset temperature and completes curing. This self-healing material expands the self-healing application scenarios of surge arresters, thereby further improving the service life of surge arresters and ensuring the stable operation of power systems.

The invention provides a waterproof layer structure capable of being self-repaired for multiple times for a tunnel, which is used for separating water for multiple times and self-repairing tunnel cracks, and is characterized by comprising at least one waterproof unit, at least one waterproof layer and at least one waterproof layer, the self-repairing material is arranged in the inner container; the outer container is arranged on the outer side of the inner container, an energy storage assembly is arranged between the inner container and the outer container and used for providing power, and the self-repairing material is extruded after the inner container is punctured by water flow, so that the tunnel cracks can be filled with the self-repairing material. The tunnel crack repairing device not only can effectively prevent leakage water from invading, but also has the function of automatically repairing cracks, and is particularly suitable for repairing cracks caused by leakage water in a tunnel. According to the method, in the tunnel construction and operation process, once the waterproof layer has microcracks or is damaged, a repairing mechanism can be automatically started, the integrity of the waterproof layer is ensured, the cracks are prevented from further expanding, and the safety and long-term stability of a tunnel structure are improved.

Disclosed is a smart sensor using a self-healing material. The self-healing material can be manufactured by a manufacturing method comprising: a first step of synthesizing an oligomer of a first self-healing polymer; a second step of hydrothermally synthesizing multi-walled carbon nanotubes functionalized with an amino group (NH4OH) by heating a solution in which multi-walled carbon nanotubes (MWCNT) and ammonium hydroxide (NH4OH) are mixed; and a third step of preparing a second self-healing polymer by molding and drying a solution in which the oligomer and the multi-walled carbon nanotubes are mixed.

The application provides an active silicon biomimetic self-repairing material and a preparation method and application thereof, and relates to the technical field of building materials.The active silicon biomimetic self-repairing material comprises, calculated on the basis of the total mass of raw materials being 100%, 50-70% of nano-microporous active silicon, 5-20% of modified epoxy resin, 10-30% of sodium silicate and 1-10% of calcium carbonate.The technical scheme can guarantee the controllability of the repair process through fine matching of the components, and can make the crystallization reaction efficiently and uniformly carried out at the cracks.

This invention relates to the field of epoxy resin self-healing materials, specifically a self-healing encapsulation material and its preparation method. This invention solves the problem of the mutual exclusion between high crosslinking density and high repair efficiency in traditional self-healing materials. The self-healing encapsulation material is prepared by mixing bisphenol A type epoxy resin, terminal epoxy-terminated hyperbranched polysiloxane, aminated mesoporous silica loaded with bisphenol F resin, and a dual-dynamic bond curing agent containing imine and disulfide bonds, followed by stepwise curing. This invention achieves deep synergy between intrinsic network exchange of dual-dynamic covalent bonds and the release of exogenous repair agents from microcapsules, and utilizes hyperbranched siloxane to impart extremely high slippage to the chain segments, effectively accelerating the physical entanglement and chemical healing of the crack interface. Simultaneously, the aminated inorganic framework ensures the mechanical strength of the system through covalent anchoring. The resulting material possesses both high mechanical strength and excellent multi-microcrack self-healing capability.

This invention discloses a concrete penetrating crystallization self-healing material, comprising the following raw materials in parts by weight: 30-40 parts silicate cement, 10-15 parts quartz sand, 5-10 parts aluminum silicate, 2-5 parts sodium citrate, 1-2 parts nano-silica, 3-5 parts fluorinated halloysite nanotubes, 2-6 parts modified calcium hydroxide, 2-5 parts surfactant, and 0.1-0.2 parts cellulose. The concrete penetrating crystallization self-healing material of this invention enables repaired concrete to maintain good mechanical strength and impermeability, exhibiting excellent self-healing effects.

The present application relates to the technical field of self-repairing materials, and discloses an air-triggered stress synergistic self-repairing asphalt-based fiber rod and a preparation method thereof, which comprises an asphalt-based outer layer and an air-triggered composite inner core, the asphalt-based outer layer is wrapped around the outer periphery of the air-triggered composite inner core, and a continuous and stable double-layer coaxial core-shell structure is formed. The double-layer coaxial core-shell structure of the air-triggered composite inner core and the asphalt-based outer layer is adopted, so that stress damage and air triggering are synergistically self-repaired, and the problems of low self-repairing efficiency and harsh triggering conditions of traditional asphalt-based materials are solved; the composite inner core is sealed and stored in the dark, remains stable and does not solidify when not in contact with air, and only starts solidification and repair when cracks occur and air penetrates, unnecessary pre-solidification waste is avoided, and the accuracy and reliability of self-repairing are improved; the asphalt-based stress-sensitive shell replaces the traditional polymer shell, is easy to break at low temperature, is stable at high temperature, and is completely homologous and compatible with asphalt.

The present disclosure provides a sensor cover comprising: a base layer; a cover layer disposed on the base layer and formed of a self-healing material; and a heating film disposed between the base layer and the cover layer and configured to generate heat. The base layer and the covering layer are integrally formed through a double-injection molding process.

The invention relates to a formula and a preparation process of an active siliceous self-repairing material in the technical field of concrete repairing, the formula comprises a siliceous base material, an active group package, a temperature-inhibiting group package, a reinforcing group package, a coagulation-inhibiting group package, an anti-cracking group package, a mud-inhibiting group package, a hydrophobic group package, a coagulation-accelerating group package and an assistant package, and the preparation process comprises the following steps: S1, preparing an active silicon self-repairing material; preparing an active group package; s2, preparing an anti-crack group packet; s3, preparing a temperature-inhibiting group packet; s4, preparing a hydrophobic group package; s5, preparing an enhanced group packet; s6, preparing a coagulation accelerating group bag; s7, preparing a coagulation inhibition group packet; s8, preparing a mud inhibition group packet; according to the concrete self-repairing agent, self-repairing of concrete structure microcracks is achieved by doping the concrete self-repairing agent in concrete or mortar, the anti-cracking and repairing purposes are achieved by enhancing the immunity of the concrete, and compared with a traditional mode, the concrete self-repairing agent has the advantages that the repairing capacity of the concrete is enhanced, the repairing effect of the concrete is improved, and the service life of the concrete is prolonged.