145 results about "Damage repair" patented technology

The invention discloses a fiber composite material based on hydrogen bond self-repairing and conductive self-diagnosis and a preparation method of the fiber composite material, and belongs to the technical field of intelligent diagnosis and self-repairing fiber reinforced resin-based composite materials and preparation of the intelligent diagnosis and self-repairing fiber reinforced resin-based composite materials. According to the method, the problem that the self-healing effect cannot be timely obtained on the internal damage of the material due to the fact that the damage area cannot be accurately positioned and identified before the damage of the existing fiber composite material is repaired is solved. According to the invention, a quantum tunnel effect and a three-dimensional conductive skeleton are constructed by using a micro-nano multi-stage conductive filler composed of a nano carbon nanotube, micron flake graphite powder and unidirectional short carbon fiber, a damage occurrence position is realized based on an electro-mechanical corresponding relation, a self-sensing function is given, and accurate positioning of the damage is realized (the error is less than 1mm). A multiple reversible hydrogen bond system formed by acrylamide, polyethyleneimine and epoxy resin is further utilized, the self-repairing effect of the composite fiber material is achieved, and the test result shows that the self-repairing efficiency of at least 90% or above is achieved at the normal temperature.

The utility model discloses a high-pressure mechanical sealing surface damage repairing device which comprises a machine base, a gear motor is arranged on the upper portion of the machine base, a transmission shaft of the gear motor penetrates through the machine base, the lower portion of the transmission shaft is connected with an automatic feeding tool table, and a turning tool is arranged on the lower portion of the automatic feeding tool table. Fastening bolts are further arranged on the lower portion of the machine base, when the repairing device is installed, the machine base is fixedly installed on the overflowing part needing to be repaired, and it is ensured that fixation is compact. The device can be used for repairing a rotten and damaged sealing surface in an ore pulp pipeline system, so that field equipment can be put into use as soon as possible to recover production, and the production efficiency is improved.

The invention provides an irradiation bubble defect repairing method and system, electronic equipment and a storage medium, and relates to the technical field of irradiation damage repairing. The repairing method comprises the following steps: applying a pulse current with a preset current parameter to a to-be-repaired area of a target substrate so as to activate a target atom in an irradiation bubble defect in the to-be-repaired area; applying an ultrasonic stress field with preset ultrasonic parameters to the to-be-repaired area within a first preset time after the application of the pulse current is ended; within a second preset time after the ultrasonic stress field is applied, the temperature of the to-be-repaired area is reduced to a target temperature interval; and performing laser shock on the to-be-repaired area based on the pulse laser with the preset laser parameters so as to repair the irradiation bubble defect. According to the method, the irradiation bubble defect can be repaired through cooperative treatment of three stages (an activation stage, an ultrasonic stress field stage and a laser shock stage).

Computer software and computer-implemented method for preparing an electronic data package in connection with a damaged vehicle for submission to the vehicle owner's insurance company for settlement of a claim or for use by an Original Equipment Manufacturer to determine compliance with established repair requirements. A computer-readable medium for storing executable software for preparing the package for a damaged vehicle, a computer system including the executable computer software stored in the computer-readable medium for preparing the package for a damaged vehicle damage are also disclosed. An electronic date package for vehicle damage repair is prepared by the computer-implemented method by executing the computer software stored in the computer-readable medium of a computer system.

The utility model, which relates to the technical field of circuit board repairing, discloses a folding and pressing damage repairing device comprising a machine table provided with a material carrying table, a fixing mechanism, a conveying mechanism, a repairing mechanism and an adjusting mechanism. When the material repairing device is used, a material to be repaired is placed on the material carrying table and fixed through the fixing mechanism, then the position of the repairing pressing head is adjusted through the adjusting mechanism, the bottom of the repairing pressing head is flush with the top face of the material, and then the conveying mechanism drives the material carrying table to move under the repairing pressing head. And when passing through the repairing pressure head, warped edges or bumps on the material are flattened by the repairing pressure head, so that the material is repaired by folding and pressing damage, manual repairing is not needed, and the repairing efficiency is improved.

This invention discloses a tunnel segment damage repair device, comprising a base plate, clamping devices on both sides of the base plate, and a supporting excavation device on the upper side of the base plate. The supporting excavation device includes a support ring with stepped holes and anchor rods inside the stepped holes. A circular shaft is rotatably connected to the base plate, and the circular shaft is driven to rotate and move axially by a driving device. A disc is fixedly connected to the upper end of the circular shaft, and the disc has a slag discharge channel. A first blade is fixedly connected to the side wall of the slag discharge channel. A sliding groove is provided at the bottom of the disc, and a sliding plate is slidably connected within the sliding groove. A second blade is fixedly connected to the outer end of the sliding plate. A sliding block is slidably connected to the support ring, and a support rod is hinged between the sliding block and the sliding plate. This invention allows the support wheel to continue rolling onto a second arc block. Because the second arc block has the largest diameter, the outer contour of the second blade is the largest, exceeding the diameter of the segment rupture. This is suitable for excavation operations in confined spaces, facilitating the subsequent formation of stepped pouring blocks, and providing greater support strength than direct filling repair methods.

The invention discloses an evaluation device and method for the damage repair effect of an oil and gas well tubular column, and the device comprises a simulation tubular column which is provided with a containing cavity and a simulation leak; the pressure detection module is used for detecting the internal pressure of the simulation tubular column; the heating simulation assembly is used for heating the simulation tubular column; the pressurization simulation assembly is used for pressurizing the simulation tubular column; the spraying assembly comprises a pressure pump, a piston container, a connecting pipe and a spraying head which are sequentially communicated, the connecting pipe is provided with a shut-off valve used for controlling connection and disconnection of the connecting pipe, the spraying head stretches into the containing cavity through the connecting pipe, and the connecting pipe is configured to be capable of moving relative to the simulation pipe column so as to adjust the position of the spraying head relative to the simulation leak. By applying the method and the device, the actual repairing process of the pipe column in actual application can be more accurately simulated, and the accuracy of repairing effect evaluation is improved. And the repairing effect of the nozzle at different positions can be simulated, and the repairing process can be optimized.

A method of repairing a thermoplastic composite material is disclosed herein. The method includes placing the thermoplastic composite material on a supporting anvil, placing an energy transmission material on top of the thermoplastic composite material, and applying an ultrasonic welder to the thermoplastic composite material to consolidate and repair the thermoplastic composite material. Another method of repairing a thermoplastic composite material is disclosed herein. The method includes placing an energy transmission material on a supporting anvil, placing the thermoplastic composite material on top of the energy transmission material, and applying an ultrasonic welder to the energy transmission material to consolidate and repair the thermoplastic composite material.

The utility model discloses a handheld electric impact threading machine which comprises a main machine and a working head. A driver is arranged in the main machine and used for driving the main machine working end of the main machine to rotate. The input end of the working head is connected with the host working end, and the host working end rotates to drive the working head to rotate synchronously; a mounting cylinder is arranged on the working head, a circular die is detachably mounted in the mounting cylinder, the working head drives the circular die to rotate synchronously when rotating, and the rotating axis of the circular die, the rotating axis of the working head and the rotating axis of the working end of the main machine coincide. A driver in the main machine drives the circular die to rotate through the working head, so that the circular die solves the problems of machining of round steel outer cylinder threads and repairing of damaged geometrical shapes of outer thread surfaces. The handheld electric impact threading machine is small in occupied space in use, can be suitable for most scenes, and can reduce the labor intensity of work and improve the working efficiency.

The invention discloses a repairing agent for repairing micro-damage of a wet lithium ion battery diaphragm and a preparation method of the repairing agent, and the repairing agent is prepared from the following components in percentage by weight: 50-80% of matrix resin; 5-20% of a latent curing agent; 3-10% of a penetration enhancer; 1-10% of a nanometer reinforcing filler; 2-10% of an ionic conductor additive; and 0.1-1% of a photo-thermal catalyst. The micro-damage repairing agent for the wet-process lithium ion battery diaphragm has excellent performance, various performance indexes of the diaphragm are greatly improved after the diaphragm is repaired, resource waste is avoided, and the micro-damage repairing agent has good industrial application prospects.

The invention discloses a copper-based salt-spray-corrosion-resistant coating and a plating method thereof.The coating comprises a self-repairing layer and a salt-spray-resistant top layer, the surface of the self-repairing layer is covered with the salt-spray-resistant top layer, and the self-repairing layer is prepared from, by weight, 10-20 parts of sustained-release microcapsules, 60-80 parts of a resin matrix and 5-10 parts of polyisocyanate; the sustained-release microcapsule is composed of a corrosion inhibitor and a polyurethane microcapsule wrapping the corrosion inhibitor; the salt mist prevention top layer is prepared from the following raw materials in parts by weight: 50 to 60 parts of polyurethane resin, 0.5 to 1 part of dimethyl octadecyl [3-(trimethoxysilyl) propyl] ammonium chloride, 1 to 3 parts of mica powder, 1 to 3 parts of nano silicon dioxide, 5 to 10 parts of hexamethylene diisocyanate tripolymer and 0.3 to 0.5 part of catalyst. The method has the effect of synchronously improving the damage repair performance and the overall mechanical property of the coating.

The invention provides UVB damage repair application of a grease composition containing safflower seed oil and fermented artemisia apiacea oil. The fermented artemisia apiacea oil is prepared by the following steps: (a) carrying out supercritical CO2 extraction on artemisia apiacea medicinal materials; (b) fermenting, namely fermenting by adopting bifidus yeast; (c) separating to obtain fermented artemisia apiacea oil; wherein the bifidobacterium is selected from bifidobacterium adolescentis, bifidobacterium animalis subspecies, bifidobacterium animalis subspecies lactis, bifidobacterium bifidum, bifidobacterium breve, bifidobacterium longum subspecies longum or bifidobacterium longum subspecies infantis. The invention further relates to application of the grease composition containing the safflower seed oil and the fermented artemisia apiacea oil in preparation of a skin external preparation with a UVB damage repairing effect.

The invention relates to the field of aluminum alloy repair, and particularly discloses a repair method for local damage of a hard anodic oxide layer on the surface of aluminum alloy, which comprises the following steps: step 1, mixing 52 + / -5wt.% of Ni powder, 13 + / -5wt.% of Cr powder and the balance of Al2O3 powder to form a powder raw material for spraying; 3, the damaged part is pretreated, specifically, the damaged part is cleaned and polished after being cleaned, a regular groove is formed, and the polished damaged part is cleaned again; step 4, spraying the damaged part by using the prepared powder raw material; and fifthly, after spraying is finished, the spraying area is polished according to the shape and size of the damaged part, so that the size and roughness parameters of the damaged part meet the preset repairing requirements. Damage repair of the hard anodic oxidation coating on the surface of the aluminum alloy part is achieved by regulating and controlling the particle size and proportion of Ni-Cr-Al2O3 in the powder raw material and matched low-pressure cold spraying process parameters.

In the embodiment of the invention, the structure layer containing the repairing capsules is adopted in the flywheel rotor, the surface of the structure layer is covered with the coating, and the repairing capsules are uniformly distributed in the structure layer and can crack to generate polymerization reaction for repairing when the flywheel rotor generates cracks; the repairing capsules are embedded in the connecting positions of the hollow center body and the spokes at intervals of 30 degrees along the circumference of the flywheel rotor, the repairing capsules determine damage repairing data of cracks when monitoring signals of breakage of the repairing capsules of the flywheel rotor structure layer and upload the damage repairing data to the control module, and the control module analyzes the damage repairing data and outputs a repairing degree value. And the early warning module gives out early warning after the repairing degree value is lower than a preset degree value, so that the whole-process safety control from beforehand prevention, in-process repairing and afterward early warning is realized, and the problem that the damage state in operation cannot be accurately repaired and timely repaired when the damage of the flywheel rotor is repaired in the prior art is solved. And the harsh requirements of the high-speed flywheel on structural integrity and long-term stability are met.

This invention provides a method for preparing an elastic self-healing surface-enhanced Raman (SERS) substrate, belonging to the field of SERS substrate preparation technology. The method employs a composite precursor constructed from dynamic covalent self-healing units, an elastomer matrix, carbon-based reinforcing fillers, noble metal nanoparticles, inorganic microspheres, and pore-regulating components. Solvent evaporation induces phase separation, followed by hot-pressing curing, to obtain an elastic self-healing SERS substrate with a predetermined porosity. This allows the SERS substrate to maintain high analyte enrichment capacity and Raman enhancement response even after damage repair. This method achieves a synergistic balance between improved detection efficiency, preserved self-healing performance, and long-term stability.

The present application relates to the technical field of composite material repair, and particularly relates to a composite material rapid repair method based on chopped carbon fiber technology, comprising the following steps: chopped carbon fiber pretreatment; resin matrix preparation; spray slurry preparation; laser cleaning of the damaged area; scanning of the unmanned aerial vehicle; layered synchronous curing; evaluation of the coating quality; the chopped fiber spraying technology is used in the aspect of composite material damage repair, the repair time is reduced, the cost is reduced, the interface bonding strength and the fiber orientation are optimized, the problem that the interlayer peeling or the fiber orientation mismatching is prone to occur in the repair area, and the mechanical property recovery rate of the repaired material is low is solved, the thickness of the bubble defect can be rapidly detected, the method is suitable for efficient, accurate and lightweight repair of carbon fiber reinforced composite material (CFRP) damage, and is particularly suitable for on-site rapid repair scene.

The invention discloses a mold composite repair decision-making method and system based on laser thermal layer-by-layer interaction, and relates to the technical field of mold repair, and the method comprises the steps: carrying out the three-dimensional scanning of a damage region of a to-be-repaired mold, and recognizing the geometric features of a damage repair model; carrying out self-adaptive hierarchical planning on the damage repair area along the depth direction, and determining an initial layer thickness for each repair layer; optimized laser process parameters are generated for the current to-be-repaired layer; performing laser repair processing on the current layer, and monitoring thermal parameters and states in the processing process in real time; dynamically adjusting the layer thickness of a subsequent repair layer and laser process parameters; and circularly executing until all the repair layers are processed. The method has the advantages that the subsequent layer thickness and process parameters can be dynamically adjusted on line, so that the generation of defects such as thermal damage, deformation and cracks is remarkably inhibited, finally, the synchronous improvement of the mold repairing efficiency and the repairing quality is realized, and the good matching of the structure property of a repaired part and a matrix is ensured.

A threaded hole bad tooth repairing tool comprises a guiding screw tap, a repairing screw tap and an abutting and supporting pull rod, the repairing screw tap comprises a plurality of repairing units, and the repairing units are clamped to the end of the guiding screw tap in the circumferential direction at intervals; the abutting and supporting pull rod penetrates through the guiding screw tap and the repairing screw tap at the same time and comprises an abutting and supporting end, the abutting and supporting end abuts against the multiple repairing units at the same time, and the abutting and supporting pull rod pulls the multiple repairing units to drive the multiple repairing units to expand outwards at the same time. In-situ repair of the damaged threaded hole of the water-turbine generator set can be achieved.

The invention provides a war injury first-aid repair simulation training platform and method. A cable manufacturing welding training table used for cable manufacturing and welding training is arranged on the upper portion of the front face of a platform body frame. The lower portion of one side face of the platform body frame is provided with an air channel connector, the air channel connector is connected with a leakproofness checking training module, the other side face of the platform body frame is provided with a tool list storage area, and the back of the platform body frame is fixedly provided with a back framework. The top of the back framework is provided with a hidden edge sealing sleeve repairing training module capable of being opened in an overturning mode through a plug pin mechanism. A first skin repair training module and a fastening and insurance training module are hung on the back framework and located on the inner layer of the invisible edge sealing sleeve repair training module; a cable manufacturing and binding training module is arranged on the back of the first skin repairing training module; the back of the fastening and insurance training module is provided with a catheter installation repair training module; a catheter recognition training area is arranged on the lower portion of the middle of the back skeleton. And training requirements of each level of personnel of a war injury first-aid repair group are met through a virtuality and reality combined training mode.

The application belongs to the field of 3D biological printing and particularly relates to a hydrogel with skin damage repair function. 3+ The application proposes a preparation method of Eu 2+ mediated collagen polypeptide / sodium alginate composite hydrogel, successfully applies the hydrogel to 3D printing skin wound dressing, uses the hydrogel as biological ink, prepares skin full-layer damage dressing through 3D printing technology, and finally uses Ca 2+ The coordination between the Eu 2+ and sodium alginate enhances the stability of the hydrogel. The 3D printing skin wound dressing constructed by the application has good function of promoting skin full-layer damage repair and has application potential in the fields of tissue engineering and regenerative medicine.

This invention relates to the field of aircraft fuel tank damage repair technology, specifically a method for rapidly repairing fuel tank punctures using metal tape, comprising: 1) damage assessment and removal; 2) adhesive surface treatment; 3) tape cutting and application; 4) metal patch manufacturing and fastener selection; 5) mechanical connection of the metal patch; 6) additional tape cutting and application; and 7) repair quality inspection. This invention overcomes the problem of long sealant curing time in traditional repair methods by using metal tape in conjunction with metal patches to mechanically connect the entire fuel tank structure, achieving rapid repair of fuel tank punctures, effectively improving sealing and mechanical performance, ensuring the safety and reliability of aircraft operation, and possessing the advantages of simple operation, speed, efficiency, and safety.

The utility model discloses a modularization assembling structure for riverway water damage repair, which comprises a plurality of bottom supporting plates and side supporting plates, the plurality of bottom supporting plates are arranged between the two side supporting plates, the plurality of bottom supporting plates are horizontally distributed, and the side supporting plates are arranged on the bottom supporting plates. The multiple side supporting plates located on the two opposite sides are obliquely distributed, the multiple side supporting plates on the two sides are symmetrically distributed, and every two adjacent bottom supporting plates located on the same horizontal direction are fixed in an inserted connection mode through an inserted connection rod. Every two adjacent bottom supporting plates located in the same horizontal longitudinal direction are fixed in an inserted connection mode through a positioning groove and a positioning frame, and the side supporting plates are fixed to the bottom supporting plates in an inserted connection mode through the inserted connection rods. According to the utility model, the device has the effect of modular assembly, the reliability and stability of the device during repair and use are ensured, and the convenience and stability of the whole device during use are improved.

The invention relates to a ceramic crack repairing method, and belongs to the technical field of ceramic surface damage repairing. The invention provides a ceramic crack repairing method which comprises the following steps: S1, plating a precious metal film on the surface of to-be-repaired ceramic through vacuum plating to obtain pretreated ceramic; s2, the pretreated ceramic obtained in the step S1 is subjected to plasma treatment, and pre-repaired ceramic is obtained; the pressure of the plasma treatment is 200 Pa to 400 Pa, and the temperature of the plasma treatment is 400 DEG C to 600 DEG C; and S3, calcining the pre-repaired ceramic obtained in the step S2 to obtain the repaired ceramic. Plasma is adopted to treat the ceramic, the plasma can change the surface stress field of the zirconia ceramic to influence the phase structure near the crack, and the crack and the microcrack on the surface of the zirconia ceramic structural part are further repaired.

The application discloses a kind of red brick engraving image breakage repair 3D printing and assembly type repair process, it is related to cultural relic repair and 3D printing technical field, the specific steps of this process are as follows: first, prepare red brick bionic inorganic composite material 3D printing special material;Repair module 3D printing digital model containing main body and 0.3mm thick transition layer is then constructed using three-dimensional laser scanning;Then integrated printing and preliminary solidification;After that, texture profiling is handled;Finally, with the help of positioning tool, accurately align and embed, after fixing with glue, stand curing to complete red brick engraving image repair;The application prepares 3D printing special material, realizes that repair material is compatible with original brick material, combines accurate modeling, integrated printing to solve traditional repair problem, adopts texture profiling process to restore original texture, completes assembly solidification with precision positioning tool etc., uses assembly type repair, greatly improves the accuracy of red brick engraving image breakage repair etc., applicable to cultural relic repair and protection.

The application discloses a kind of conveying belt tear damage repair processes, comprising the following steps: S1: the tear damage area and periphery of conveying belt are carried out surface pretreatment;S2: coating primer is applied in the area after pretreatment;S3: after two-component oily polyurethane colloid is mixed uniformly, it is scraped and applied to the primer area;S4: the colloid after scraping and applying is preliminarily cured;S5: the repair area after preliminary curing is kept at constant temperature;S6: the repair area after curing is finished surface finishing, so that it is flush with the surface of conveying belt body.The application compared with prior art has the advantages that: provide a kind of conveying belt tear damage repair process capable of quickly repairing, thereby reducing loss, and guaranteeing the service life after maintenance.

The invention provides an ocean concrete structure wet interface repairing construction method and a repairing material thereof. The repairing material is prepared from 100 to 150 parts of hydroxyl-terminated polydimethylsiloxane, 20 to 60 parts of butyl rubber, 30 to 80 parts of sulphoaluminate cement, 5 to 15 parts of cross-linking agent, 2 to 8 parts of latent catalytic system, 3 to 10 parts of tackifying resin and 20 to 100 parts of filler, wherein the latent catalytic system is prepared by complexing an organic tin catalyst and a chelating agent, long-term storage stability at normal temperature is realized, and a curing reaction is triggered under the combined action of moisture and temperature. According to the construction method of the repairing material, direct construction can be carried out under the wet interface condition that the water content of the surface of a base material is 5%-20%, drying treatment is not needed, the construction process is simple, convenient and rapid, and the method is suitable for in-situ repairing of a tidal range area concrete structure, an underwater concrete structure, an ocean platform pile foundation and wharf facilities; the coating can be constructed under the wet interface condition that the water content of the surface of a base material is 5%-20%, does not need drying treatment, and can be used for corrosion prevention and repair of marine concrete structures, crack sealing, damage repair and steel bar corrosion prevention and protection.

The invention relates to the technical field of biomedical materials, in particular to radiotherapy injury repair injection hydrogel and a preparation method thereof, and the preparation method comprises the following steps: S1, preparing PLGA wrapped anti-inflammatory traditional Chinese medicine formula microspheres by taking an anti-inflammatory traditional Chinese medicine formula, a polylactic acid-glycolic acid copolymer and polyvinyl alcohol as raw materials; s2, dispersing the PLGA coated anti-inflammatory traditional Chinese medicine formula microspheres in a gelatin solution to obtain a solution A; s3, mixing the solution A with an oxidized sodium alginate solution to obtain the radiotherapy injury repair injection hydrogel. The preparation method comprises the following steps: embedding an anti-inflammatory traditional Chinese medicine formula in PLGA microspheres, dispersing the microspheres in an amino group-containing solution such as gelatin, mixing with an oxidized sodium alginate solution, and carrying out a Schiff base reaction on the amino group of the gelatin and the oxidized sodium alginate to form the imine bond dynamic crosslinking injectable hydrogel. Therefore, local slow release of the anti-inflammatory traditional Chinese medicine formula is realized, and the purpose of efficiently repairing radiotherapy injury is achieved.

The application discloses an aero-engine compressor blade damage on-site repair method in the technical field of compressor blade damage repair, adopts any one or a combination of two of the repair methods of the repair method or the symmetric shearing method, removes the damage on the blade without disassembling the blade disc, reduces the influence of the damage on the compressor performance, simultaneously prevents the damage from further expanding, and the repaired blade disc can continue to be used, increases the service life of the blade disc, and guarantees the safety during the use of the blade disc.

The utility model relates to a prestressed sheath damage repairing device which comprises a prestressed tendon and a replacement sheath, the prestressed tendon is sleeved with an original sheath, filler is arranged in the original sheath, a substitute is arranged on the inner side of the filler, the substitute can be in a rod shape or a pipe shape, and the replacement sheath is arranged in the original sheath. The diameter of the substitute is larger than that of a steel strand in the prestressed tendon, and a guide rod structure is installed on one side of the steel strand. Through the guide rod structure, the replacement sheath, the sheath bonding substance and other structures, after pile top over-grouting section concrete is broken, the original seriously-damaged sheath and filler on the prestressed tendon are removed, only the steel strand is left, then the guide rod structure is installed, the replacement sheath is cut into the needed length, and when the replacement sheath is installed, the replacement sheath bonding substance is not required to be replaced. The replacement sheath is sleeved into the steel strand while the replacement object is drawn out, so that the situation that the replacement sheath is difficult to install is prevented.

The invention provides an SH-TPU-based flexible heater with a self-repairing function and a preparation method of the SH-TPU-based flexible heater. According to the heater, SH-TPU serves as a flexible substrate, Ag FDs serves as conductive ink and serves as a heating layer, the SH-TPU substrate is synthesized through a two-step method, and then the AgFDs conductive ink is deposited on the surface of the substrate through a silk-screen printing technology. According to the SH-TPU substrate, self-repairing is achieved through reversible dissociation and recombination of dynamic bonds, damage repairing can be completed in 3 hours in the environment of 60 DEG C or above, the mechanical property is recovered after healing, and 1.5 kg of heavy objects can be lifted; the temperature of the heater can be increased to 105.66 DEG C from the room temperature within 20 seconds only by 5V low voltage, the heating efficiency of unit voltage reaches 21.13 DEG C / V, the saturation temperature drop amplitude after cutting or piercing injury self-healing is smaller than 5%, and the method has outstanding application value in low-power-consumption and high-demand scenes such as flexible electronics and wearable equipment.