37results about How to "Achieve self-healing effect" patented technology

The invention relates to a synchronous belt. The synchronous belt is formed by casting a rubber compound and strong thread rope, and the rubber compound comprises, by weight, 45-60 parts of hydrogenated nitrile butadiene rubber, 14-25 parts of trans-1,4-polyisoprene, 6-10 parts of polybutylene telephthalate, 4-8 parts of methacryloxy silane, 7-15 parts of a microcapsule, 1-4 parts of a lubricant, 1-4 parts of a curing agent and 1-2 parts of an antioxidant; and the strong thread rope is one of glass fibers, polyester fibers, aramid fibers and carbon fibers. The invention also relates to a production of the synchronous belt. The adhesive wrapping microcapsule is dispersed in a matrix, and when the matrix micro-cracks, the wall of the polyurea resin capsule is ruptured, so the adhesive in the microcapsule flows out of the capsule, and realizes cross-linking curing of an epoxy group with -NH2 in the matrix in order to realize a self-healing effect of the synchronous belt; and hydrogenated nitrile butadiene rubber, trans-1,4-polyisoprene and methacryloxy silane are used to effectively improve the integral performances of the synchronous belt.

The invention discloses a self-healing backwater surface waterproof material capable of stopping open water, a preparation method and application thereof. The material comprises the following powder materials by weight: 16-22 parts of sulphoaluminate cement, 8-12 parts of mineral powder, 6-10 parts of fly ash, 40-48 parts of quartz sand, 4-6 parts of sodium silicate, 0.5-1 part of a waterproof agent, 4-8 parts of silica fume, 4-6 parts of rubber powder, 0.25-0.4 part of an early strength agent and 0.3-0.8 part of magnesium fluosilicate; and the liquid materials: 20-26 parts of a polymer emulsion, 0.1-0.2 part of an antifoaming agent, 0.05-0.15 part of a dispersant, 0.05-0.1 part of a multifunctional auxiliary agent, 0.06-0.12 part of an antiseptic, 0.08-0.14 part of an anti-freezing agentand 20-26 parts of water. The material disclosed by the invention is good in durability, impermeable, anti-cracking and anti-freezing; and the waterproof material is simple and convenient to manufacture and convenient to construct, has self-repairing and self-healing effects when leakage occurs again, and achieves an efficient and long-lasting waterproof effect.

The invention discloses a preparation method of novel photo-induced self-repairing nanometer composite hydrogel. The high-strength nanometer composite hydrogel is prepared by constructing a functionalized nanometer cross-linking agent by virtue of the coordination effect of unsaturated metal atoms on the surface of a transition metal chalcogenide compound (taking a molybdenum disulfide nanosheet as an example) on S atoms. A brand-new hydrogel self-repairing mechanism is provided on the basis of a dynamic Mo-S bond, and the high-strength nanometer composite hydrogel capable of completing self-repairing under near-infrared light induction is prepared by combining the excellent photo-thermal performance and mechanical performance of molybdenum disulfide.

The invention provides a microcapsule using an isocyanate derivative as a core material. The microcapsule comprises the following components by weight percent: 30wt%-65wt% of modified paraffin, 34wt%-68wt% of the isocyanate derivative and 1wt%-2wt% of an additive. The microcapsule provided by the invention is of a core-shell-similar structure, and the modified paraffin is used as a wall material to package the isocyanate derivative used as the core material. When the microcapsule provided by the invention is added to a common coating, the microcapsule is stably stored in the coating during storage. After being coated to form a film, the microcapsule does not have adverse effects on the properties of the film. When the film is damaged, the microcapsule of a damaged part is fractured to release the isocyanate derivative, the isocyanate derivative is permeated along a gap until to fill up the gap of the damaged part, the isocyanate derivative is subjected to cross-linking reaction with moisture in the air to be solidified, the damaged surface of the film is successfully repaired after the isocyanate derivative is solidified to achieve the self-healing effect, and the service life of the film also can be prolonged simultaneously.

The invention relates to an anti-interference attack detection and self-healing controller and control method for an unmanned aerial vehicle attitude control system and aims to ensure the self-healingcapability of the unmanned aerial vehicle attitude control system under malicious attack and improve the reliability of the unmanned aerial vehicle attitude control system through simultaneous rapidestimation and online compensation of attack and interference signals. The anti-interference attack detection and self-healing controller and control method for the unmanned aerial vehicle attitude control system are used for unmanned aerial vehicle attitude control systems influenced by attack and interference at the same time. According to the anti-interference attack detection and self-healingcontroller and control method for the unmanned aerial vehicle attitude control system of the invention, a multi-source interference model of an unmanned aerial vehicle attitude control system is established; an inner loop variable structure interference observer is designed to realize the rapid estimation of interference; a composite anti-interference attitude control law is designed to stabilizethe anti-interference attitude of the unmanned aerial vehicle; and an outer loop attack detection and self-healing control unit with an interference compensation effect is designed to ensure that theunmanned aerial vehicle system discovers attack behaviors in time and starts a repair program. With the controller and control method of the invention adopted, the accuracy and real-time performance of attack detection under the influence of interference can be improved, and the anti-interference self-healing control problem of an unmanned aerial vehicle in the tasks of strategic reconnaissance, earthquake relief work, environmental monitoring and the like can be solved.

The invention provides high-hardness thermosetting self-repairing polyurethane and a preparation method thereof. According to the technical scheme, isocyanate-terminated polyurethane containing 2-hydroxyethyl disulfide as a functional group, and polyvinyl alcohol grafted polycaprolactone are cross-linked and cured to synthesize thermosetting self-repairing polyurethane with high self-repairing efficiency, high hardness and transparency. Self-repairing of the material is achieved on the basis of disulfide bond exchange reaction, polyvinyl alcohol grafted polycaprolactone is taken as a cross-linking agent to provide a cross-linking network, and the obtained material has excellent mechanical properties, high Young modulus, good transparency, high self-repairing efficiency, shape memory, reprocessing and other properties. Besides, the invention also discloses a synthesis method of the polyvinyl alcohol grafted polycaprolactone, the polyvinyl alcohol grafted polycaprolactone prepared by themethod has a plurality of hydroxyl sites, the hydrogen bond interaction among molecular chains is increased, and higher chemical and physical crosslinking degree is achieved.

The invention provides a high-hardness thermosetting self-repairing polyurethane and a preparation method thereof. The technical scheme uses isocyanate-terminated polyurethane containing 2-hydroxyethyl disulfide as a functional group to cross-link and cure polyvinyl alcohol-grafted polycaprolactone to synthesize a thermosetting self-healing material with high self-healing efficiency and high hardness and transparency. Repair polyurethane. The invention realizes the self-healing of the material based on the disulfide bond exchange reaction, and provides a cross-linked network by grafting polycaprolactone with polyvinyl alcohol as a cross-linking agent, and the obtained material has excellent mechanical properties, high Young's modulus, and at the same time The material has good transparency, high self-healing efficiency, shape memory, reprocessing and other properties. In addition, the present invention also discloses a synthesis method of polyvinyl alcohol-grafted polycaprolactone. The polyvinyl alcohol-grafted polycaprolactone prepared by the method has multiple hydroxyl sites, which increases the interaction of hydrogen bonds between molecular chains. role, can provide a higher degree of chemical and physical cross-linking.

The invention discloses a metal-organic framework encapsulating a corrosion inhibitor compound and a preparation method and application thereof. The compound is composed of a ZIF metal-organic framework material and a corrosion inhibitor encapsulated therein. The composite material system is applied in the splash area of ​​seawater waves. Due to the local acidic environment in the early stage of the alternating dry-wet cycle corrosion of carbon steel or metal products, the metal-organic framework is defective and the corrosion inhibitor is released, which can realize the targeting of the corrosion-induced area. protection. Further encapsulation of copper ion-modified thiazole corrosion inhibitors in metal-organic frameworks can obtain higher reprinting capacity. To inhibit the microbial corrosion caused by the growth of various aerobic bacteria on the surface of the substrate. Adopting the corrosion inhibition system of the present invention has strong targeting, high efficiency and durability, high cost performance, and has remarkable application value and broad market prospect.

The invention discloses a self-healing branched polyethylene diamine hydrogel microcapsule composite material, its preparation method and application, and belongs to the technical field of new energy materials. Self-healing hydrogel microcapsules are formed by encapsulating carbonaceous microspheres and branched polyethylene diamine hydrogel with a trimethylolpropane ethoxylate triacrylate shell, and then combining nano-vanadium pentoxide with self-healing hydrogel The active composite material of the positive electrode of the magnesium ion battery is obtained by mixing the glue microcapsules. The invention can accurately heal the cracks of the positive plate of the magnesium ion battery after the hydrogel with self-healing function is released, and the conductive carbonaceous balls play a bridge role in the electrode cracks, effectively enhancing the electron transport channel and the electrode stability. As a result, the conductive carbonaceous spheres and the branched polyethylene diamine hydrogel have a synergistic effect, which can not only achieve electron conduction healing, but also ensure good stability after self-healing, thereby realizing the battery's rapid charge-discharge cycle. Super long life.

The invention discloses a preparation method of a gold nanorod and polymer hybrid material with a self-healing performance and relates to organic / inorganic hybrid nano materials.The preparation method includes enabling the surfaces of prepared gold nanorods to be provided with reactive aminos by a ligand exchange method, preparing P(MMA-co-AAEM)-b-POEGMA copolymers with proportion-adjustable chain segments by a reversible addition-fragmentation chain transfer polymerization method, and doping the gold nanorods into polymers to achieve good dispersion of the gold nanorods in the polymers under the action of imine bonds and hydrogen bonds formed between the aminos and the polymers so as to obtain the hybrid material.By the aid of effective light-heat conversion performance of the gold nanorods, the hybrid material can be subjected to defect self-healing under the action of near-infrared light.

The invention provides a microcapsule using an isocyanate derivative as a core material. The microcapsule comprises the following components by weight percent: 30wt%-65wt% of modified paraffin, 34wt%-68wt% of the isocyanate derivative and 1wt%-2wt% of an additive. The microcapsule provided by the invention is of a core-shell-similar structure, and the modified paraffin is used as a wall material to package the isocyanate derivative used as the core material. When the microcapsule provided by the invention is added to a common coating, the microcapsule is stably stored in the coating during storage. After being coated to form a film, the microcapsule does not have adverse effects on the properties of the film. When the film is damaged, the microcapsule of a damaged part is fractured to release the isocyanate derivative, the isocyanate derivative is permeated along a gap until to fill up the gap of the damaged part, the isocyanate derivative is subjected to cross-linking reaction with moisture in the air to be solidified, the damaged surface of the film is successfully repaired after the isocyanate derivative is solidified to achieve the self-healing effect, and the service life of the film also can be prolonged simultaneously.

The invention discloses a metal-organic framework encapsulating a corrosion inhibitor compound and a preparation method and application thereof. The compound is composed of a ZIF metal-organic framework material and a corrosion inhibitor encapsulated therein. The composite material system is applied in the splash area of ​​seawater waves. Due to the local acidic environment at the initial stage of the alternating dry-wet cycle corrosion of carbon steel or metal products, the metal-organic framework is defective and the corrosion inhibitor is released, which can realize the targeting of the corrosion-induced area. protection. Further encapsulation of copper ion-modified thiazole corrosion inhibitors in metal-organic frameworks can obtain higher reprinting capacity. To inhibit the microbial corrosion caused by the growth of various aerobic bacteria on the surface of the substrate. Adopting the corrosion inhibition system of the present invention has strong targeting, high efficiency and durability, high cost performance, and has remarkable application value and broad market prospect.

The invention discloses a method for preparing microcapsules for self-healing electrophoretic coatings. In the invention, gelatin-modified urea-formaldehyde resin is added as the capsule wall to improve the flexibility of the surface of the self-healing microcapsules, and the obtained microcapsules have good shape, The surface is smooth, the structure is dense, and it has high strength; in the present invention, SiO is treated with silane coupling agent 2 After the surface is grafted to the surface of the urea-formaldehyde resin capsule wall, the SiO formed on the surface of the microcapsules 2 layer, has good barrier properties and strength, thereby reducing the occurrence of microcapsule adhesion, and the prepared microcapsules have good stability and uniform particle size distribution; for the microcapsules prepared by the method of the present invention, n-butylene is added to the capsule core Based on glycidyl ether solvent, it has a good dilution effect on the modified epoxy resin capsule core. Using the principle of siphon effect, the epoxy resin solution can completely penetrate into the damaged part of the entire coating film along the gap, and a crosslinking and curing reaction occurs. So as to achieve a self-healing effect.

The invention relates to an anti-jamming attack detection and self-healing controller and control method of an unmanned aerial vehicle attitude control system. At the same time, rapid estimation and online compensation ensure the self-healing ability of the UAV attitude control system under malicious attacks and improve the reliability of the UAV attitude control system. Firstly, the multi-source interference model of the UAV attitude control system is established; secondly, the inner loop variable structure interference observer is designed to realize the rapid estimation of the interference; then, the compound anti-jamming attitude control law is designed to realize the anti-jamming attitude stabilization of the UAV; Finally, the outer loop attack detection and self-healing control unit with interference compensation effect is designed to ensure that the UAV system detects the attack behavior in time and starts the repair program. The invention can improve the accuracy and real-time performance of attack detection under the influence of interference, and can solve the problem of anti-interference self-healing control of unmanned aerial vehicles in tasks such as strategic reconnaissance, earthquake relief, and environmental monitoring.

The invention belongs to the technical field of construction engineering structure reinforcement, and particularly relates to a crystal structure self-healing grouting method. Crystalline materials are added into 60 DEG C-80 DEG C warm water to be evenly mixed to form a saturated solution, grouting materials are additionally added to be mixed and stirred according to the ratio of grouting materialto water given by instructions of the grouting materials, stirring is carried out to a normal temperature status, and grouting is carried out based on an existing grouting method after the crystal materials crystallize fully. The crystal materials are any crystal material which is soluble in water, does not react with cement and has the effect of cooling and crystallization. According to the crystal structure self-healing grouting method, an original grouting reinforcement method is improved, lacks of the original method is supplemented, and a groundbreaking supplement is achieved to an existing reinforcement method; and according to the technical scheme, the grouting materials are adopted by an existing traditional reinforcement, but a construction method is improved, so that the concrete achieves the effect of self-healing, and the service life is prolonged.

The invention discloses a preparation method of an aluminum oxide tritium-resistant insulating coating on the surface of a vanadium alloy, and relates to the field of surface engineering technology and thermonuclear fusion application. The method comprises the following steps: pretreating a vanadium alloy matrix material; carrying out hot-dipping aluminum plating treatment on the pretreated matrix material; and carrying out micro-arc oxidation treatment on the surface of the material subjected to hot-dipping treatment. In this way, the aluminum oxide coating which is good in tritium resistance, insulativity and abrasion resistance and high in adhesive force and has self-repairing force can be prepared on the vanadium alloy matrix. The method can be used in the field of nuclear fusion tritium-resistant coatings of liquid lead-lithium breeder claddings.

The invention relates to a synchronous belt. The synchronous belt is formed by pouring a rubber material and a strong wire rope. The rubber material includes 45-60 parts by weight of hydrogenated nitrile rubber, trans 1,4-polyisoprene 14 ~25 parts, 6~10 parts of polybutylene terephthalate, 4~8 parts of methacryloxysilane, 7~15 parts of microcapsules, 1~4 parts of lubricant, 1~4 parts of curing agent , 1 to 2 parts of anti-aging agent; the strong cord is one of glass fiber, polyester fiber, aramid fiber and carbon fiber. The present invention also relates to the preparation method of the synchronous belt. The microcapsules wrapped with the adhesive are dispersed in the matrix. When microcracks appear in the matrix material, the capsule wall of the urea-formaldehyde resin is ruptured, and the adhesive in the microcapsules flows out of the capsule to pass through the ring. Oxygen and ‑NH2 in the matrix material are cross-linked and cured, so that the synchronous belt achieves self-healing effect; while hydrogenated nitrile rubber, trans 1,4‑polyisoprene and methacryloxysilane The use effectively improves the overall performance of the synchronous belt.