11 results about "Self-healing material" patented technology

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.

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.

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.

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.

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 application discloses a kind of self-repairing material for underwater flow field sensing and its preparation method and application, belong to underwater sensing and intelligent material technical field.The application utilizes the self-repairing characteristics of PBS and the inherent conductivity of carbon nanotube and graphene, and prepares self-repairing self-pleated microstructure underwater flow field sensing surface by spraying-rolling method.When the surface is damaged, the continuity of PBS matrix is destroyed and accompanied by the fracture of local conductive network.In water environment or humid environment, water molecules can promote the reversible exchange and rearrangement of dynamic borate ester bond in PBS, so that the polymer chain segments at the fracture interface are reconnected and the network structure is restored, thereby accelerating the crack closure process.Meanwhile, the conductive channel composed of MWCNT / GNP gradually restores the conductivity and flow field response signal, so that the surface re-forms stable microtexture morphology, thereby realizing the continuous sensing and long-term service of flow field disturbance in underwater environment.

This invention relates to a photocatalytic self-healing capsule for cement-based materials and its preparation method. The method for preparing the self-healing capsule includes the following steps: Step 1, mixing sodium bicarbonate, calcium hydroxide, citric acid, and water to obtain a slurry; Step 2, injecting the slurry into a mold and solidifying it to form a capsule core sphere; Step 3, coating the capsule core sphere with a capsule shell, the capsule shell comprising polyethylene material and a photocatalyst to promote polyethylene degradation. This invention, by adding a polyethylene shell made with a photocatalyst, ensures that after concrete cracks appear, the photocatalyst promotes the degradation and breakage of the polyethylene shell under light, thus ensuring that the self-healing material inside the capsule shell can be released and function, solving the problem of existing capsule shells potentially failing to break. After the capsule core sphere is released, it reacts with rainwater to generate a calcium solid substance, filling the concrete cracks and achieving self-healing repair of the concrete cracks.

The invention belongs to the technical field of self-repairing materials, and particularly relates to a self-repairing anti-scraping optical thin film, a preparation method thereof and application of the self-repairing anti-scraping optical thin film in a display device. By reasonably setting the thickness and material composition of the base material layer, the self-repairing functional layer and the anti-scraping layer, all the layers have a synergistic effect, and the self-repairing performance, the anti-scraping performance and the optical performance can be achieved at the same time. The self-repairing functional layer is compounded by polyurethane elastomer and polycaprolactone glycol, and nano silicon dioxide is added, so that not only are the self-repairing performance and the mechanical performance improved, but also the self-repairing efficiency is enhanced; and the anti-scraping layer is formed by combining organic silicon resin and nano silicon nitride, so that the anti-scraping performance is ensured, and meanwhile, the influence on the optical performance is avoided.

This invention provides an organic-inorganic hybrid superabsorbent resin for cement-based self-healing materials and its preparation method. The preparation method includes: dispersing soluble carbonates and nano-silica in water, then adding sodium alginate for dispersion and dissolution, followed by adding acrylic monomers, initiators, and crosslinking agents to carry out a polymerization reaction, and finally obtaining a powdered resin after post-treatment. This invention utilizes the synergistic modification of "soluble carbonates + nano-silica + sodium alginate" to load an excess of carbonate internally into the resin. This releases carbonate ions in the cracks, which react with calcium ions to form calcite, achieving dual repair through physical expansion and chemical precipitation. Cement-based materials incorporating this superabsorbent resin exhibit a 7-day healing rate of over 90% for cracks up to 300 μm, a near 90% impermeability recovery rate, and a 28-day compressive strength loss of only 2.7%. Furthermore, the combination of the superabsorbent resin and polyethylene fiber effectively prevents brittle fracture, significantly improving the self-healing effect.