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

The invention discloses a compound of a metal organic framework encapsulation corrosion inhibitor and a preparation method and application thereof. The compound is composed of a ZIF metal organic framework material and the corrosion inhibitor encapsulated in the ZIF metal organic framework material. A composite material system is applied to a sea wave splashing zone, and carbon steel or a metal product make a metal organic framework generate defects due to the local acidic environment in the initial stage of dry-wet circulation alternating corrosion, so that the corrosion inhibitor is released, and targeted protection of a corrosion-induced region can be realized. Furthermore, the copper ion modified thiazole corrosion inhibitor is encapsulated in the metal organic framework so that highertransfer capacity can be obtained. Meanwhile, copper ions are desorbed from a pre-coordinated corrosion inhibitor shielding site under an acidic microenvironment, and microbial corrosion caused by growth of various aerobic bacteria on the surface of a substrate can be further inhibited. The corrosion inhibition system is high in targeting property, efficient, durable, high in cost performance, remarkable in application value and wide in market prospect.

Shrinkage-reducing anti-cracking pavement cement concrete and a preparing method thereof are disclosed. The cement concrete is prepared from water, cement, fly ash, basalt fibers, light aggregate, broken stone, sand and a water reducing agent in a mass ratio of (180-200):(400-410):(40-50):(2.65-5.3):(229-286):(465-559):(830-850):(4.1-4.5). The light aggregate is uniformly dispersed in the concrete, the concrete is not liable to crack, adhesive force between the fibers and cement slurry is high, microcrack development is slow, and the concrete has high fatigue resistance and tension resistance.

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 an ion response type antibacterial and anticorrosive coating, which comprises the steps of firstly, preparing a SiO2 nano container through liquid phase mixing and reflux condensation, then mixing the nano material with an antibacterial agent, carrying out ultrasonic treatment to obtain a nano container loaded with the antibacterial agent, then packaging the nano container by adopting a FeIII-TA complex molecular film, finally, according to a basic method for preparing the coating, adding the functional filler into the matrix coating, then adding a coating additive, and stirring at a high speed to obtain the ion response type antibacterial and anticorrosive coating. The selected coating is a water-based coating, the antibacterial agent is triclosan (TCS), and the coating and the antibacterial agent have the characteristics of being green and environment-friendly and do not contain harmful components. In the using process, harm to the human body and the environment is avoided, and the coating has the characteristics of self-repairing, long antibacterial aging and excellent corrosion resistance.

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 discloses a preparation method of a Z-pins-like metal rod enhanced carbon ceramic composite material. According to the method, pretreated metal powder is filled into longitudinal blind holes of a carbon-ceramic composite material; pressing and shaping are performed; sintering is performed in vacuum or inert atmosphere; the Z-pins-like metal rod enhanced carbon ceramic composite material is obtained. By using the technical scheme, the blind hole is prefabricated in a thickness direction of a shaped carbon-carbon prefabricated body or a carbon-carbon prefabricated body; then, the Z-pins-like metal rod enhanced carbon ceramic composite material is obtained through sintering after the metal or alloy powder filing in the blind hole; on one hand, the metal in the formed Z-pins-likestructure is oxidized superior to the ceramic base body in high-temperature environment; a good self healing effect of cracks, holes and the like can be reached; the high-temperature service time ofthe test samples is prolonged; the high-temperature service performance is improved; on the other hand, a great amount of energy is consumed through the mechanical linkage and pulling of the Z-pins-like structure, so that the interlayer cracking resistance performance of the base body is improved; the mechanical performance of the carbon-ceramic composite material is improved.

The invention discloses a self-healing medical gel, belonging to a medical material. The self-healing medical gel is a medical gel that has a double crosslinked and double-network structure and has self-healing capability and is formed by blending a polysaccharide or protein partially modified by dopamine, a crosslinking agent and iron ions. A modified material is high in strength and good in biocompatibility. A red and blue light generator is distributed in the gel to increase collagen fibers of the wound, thereby promoting wound healing and avoiding the contamination risk caused by removal of a dressing during phototherapy, labor intensity of medical workers is reduced, and the self-healing medical gel has a strong application prospect in the field of medical rescue.

The invention provides bionic self-healing asphalt and a preparation method thereof. The bionic self-healing asphalt is prepared from matrix asphalt and a bionic self-healing asphalt modifier, wherein the bionic self-healing asphalt modifier is prepared from a self-healing component. A material which has swelling property and autonomously propagates and crystalizes at normal temperature is taken as the self-healing component, and is combined with the common matrix asphalt in the art to simulate a human body healing system, so that on the premise of not affecting the pavement performance of swelling the asphalt, the obtained bionic self-healing asphalt enables a road to have an autonomous healing function like a human body; the bionic self-healing asphalt has the functions of swelling and autonomously propagating and crystalizing, the preparation method is simple, the production cost is low, and the prepared bionic self-healing asphalt has the effects of autonomously healing cracks and effectively reducing cracking, and furthermore other properties of the asphalt are not affected.

The invention discloses a chitosan / poly-sulfonic acid group betaine dual network self-healing hydrogel and preparation method thereof, and relates to the field of hydrogels. The hydrogel is of a duelnetwork structure which is formed by mutually penetrating of a first network and a second network, the first network is a physical crosslinking network formed by the coordination action of the chitosan and polyvalent anions, the second network is a poly-sulfonic acid group betaine physical crosslinking network, and the first network intersperses in the second network. According to the chitosan / poly-sulfonic acid group betaine dual network self-healing hydrogel, the first network is formed by selecting the chitosan and the polyvalent anions, the second network is formed by selecting the poly-sulfonic acid group betaine, a micelle is adopted as a physical crosslinking point of the poly-sulfonic acid group betaine second network to be crosslinked with the second network, thus the first network and the second network intersperse each other, the duel network structure of the hydrogel is achieved, thus the hydrogel has excellent mechanical properties and self-healing ability, the resistance change rate under strain is large, the sensitivity is high, the test range of a strain sensor is wider, and wide application prospects are achieved.

The invention discloses a method for improving microbial cemented sand. The method comprises the following steps that 1), bacteria are cultured, then the OD 600 value and the activity value of the bacterial liquid are tested, and the bacterial liquid is stored; 2), a cementing solution is prepared; 3), a soil body is prepared; 4), a modifier is prepared; 5), the modifier is added to the soil body,and the weight ratio of the modifier to the soil body is 1:1,000; 6) then, the bacterial liquid is added, the weight ratio of the bacterial liquid to the soil body is 100:1; 7), the cementing solution is added, wherein the weight ratio of the cementing solution to the soil body is 3:10; and 8), finally, an allicin aqueous solution with the mass fraction being 2.5% is added, and the weight ratio of the allicin aqueous solution to the soil body is 1:1,000. By the adoption of the method for improving the microbial cemented sand, the unconfined compressive strength and the residual strength of the sand soil can be remarkably improved, in particular, the defects of the original brittleness of the microbial cemented sand can be improved, the toughness in the damage process is increased, the positive effect is achieved for improving the safety and stability of the engineering structure, and the method is suitable for wide application and popularization.

The invention relates to a preparation method and application of a waterborne automotive coating material with a self-repairing function, and belongs to the series of waterborne automotive coating materials. The invention discloses a preparation method of a silica nano modified polyurethane aqueous dispersion. According to the preparation method, the special physicochemical performance of a nano material and the advantages of polyurethanes are sufficiently combined; the waterborne automotive coating material with the self-repairing function is researched and developed; the microdamage of a surface coating of a car body, particularly the damage which cannot be easily detected in an interior, is enabled to realize self-repairing at a broken position of the coating by means of the coating material in the condition of not using an additional repairing material; the waterborne automotive coating material has significant value. Meanwhile, a nano particle and a framework material interact; aformed paint film is high in luster, good in fullness and excellent in mechanical performance; the comprehensive performance is greatly improved, and the silica nano modified polyurethane aqueous dispersion is environment-friendly and energy-saving, is high in operability, is convenient to popularize and apply, and has a wide market prospect.

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 preparation method of microcapsules for self-healing electrophoretic coatings. A gelatin modified urea-formaldehyde resin is added as capsule walls, thereby improving the flexibility of the surfaces of the self-healing microcapsules, and the obtained microcapsules have the characteristics of high morphology, smooth surface, compact structure and higher strength. SiO2 is grafted onto the surfaces of the urea-formaldehyde resin capsule walls after the surface of the SiO2 is treated with a silane coupling agent, so that SiO2 layers formed on the surfaces of the microcapsules have high barrier property and strength, the occurrence of the microcapsule adhesion phenomenon is reduced, and the prepared microcapsules have high stability and are uniform in particle size distribution. In the microcapsules prepared with the method, an n-butyl glycidyl ether solvent is added into capsule cores, so that modified epoxy resin capsule cores are well diluted. According to the principle of siphon effect, an epoxy resin solution can fully permeate through damaged parts of a whole film along an aperture and undergo a crosslinking and curing reaction, thus achieving a self-healing effect.

The invention belongs to the technical field of self-repairing polyurethane materials, and discloses room-temperature self-repairing polyurethane based on multiple self-repairing units and a preparation method of the room-temperature self-repairing polyurethane. According to the invention, multiple hydrogen bonds and boric acid ester bonds are introduced to synthesize polyurethane capable of self-repairing at room temperature under assistance of water. According to the polyurethane, the synergistic effect of various dynamic bonds is utilized, firstly, an inherent dynamic hydrogen bond system in a polyurethane system is contained, secondly, dynamic coordination bonds and multiple hydrogen bonds are formed through nitrogen and boron coordination, the obtained material has good mechanical performance, and meanwhile, the borate bonds endow the material with the room-temperature self-repairing performance under the action of water. The preparation technology is simple, the cost is low, and the application prospect is wide.

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 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 provides a preparation method of a laser-modified self-healing thermal barrier coating based on ultrasonic vibration assistance. The preparation method comprises the following steps of: uniformly spreading mixed powder containing self-healing particles on a thermal barrier coating sample, putting the sample on an ultrasonic vibration table, and performing laser-modified surface treatment by using a 1kW laser manufacturing system to obtain a self-healing thermal barrier coating. According to the preparation method, the self-healing particles are doped in the thermal barrier coating by using an ultrasonic vibration-assisted laser alloying technology, and the self-healing particles are uniformly distributed in a modified layer; in the thermal service process of the thermal barrier coating, the self-healing particles are oxidized at high temperature to generate oxides to generate volume expansion so as to fill cracks, so that the self-healing effect of the cracks is achieved, and the thermal shock resistance and the thermal corrosion resistance of the thermal barrier coating are improved; and by adopting the laser-modified thermal barrier coating obtained by the preparation method, the adaptability and the service life of key hot end parts of high-end equipment in a high-temperature severe service environment can be obviously improved and prolonged.

The invention provides a self-repairing wear-resistant coating and a preparation method thereof. The coating is prepared from the following raw materials in parts by weight: 50 to 100 parts of modified phenolic resin, 10 to 20 parts of calcium naphthenate, 10 to 20 parts of methyltrimethoxysilane, 15 to 30 parts of self-repairing microcapsules and 8 to 15 parts of latent curing agent, the self-repairing microcapsule comprises a capsule core and a capsule wall; the capsule core comprises a catalyst and ethyl cellulose; the capsule wall is made of modified phenolic resin. When the coating is coated to form a coating, the coating has excellent wear resistance and stable self-repairing characteristic, the coating has high adhesive force with a pasted object, and in addition, the coating also has good mechanical strength and excellent water resistance.

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 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.