35 results about "Microwave absorber" patented technology

A transparent wideband microwave absorber unit cell, a transparent wideband microwave absorber and a method of forming a transparent wideband microwave absorber, include a metal substrate, a first layer of glass attached to the metal substrate and having a first pattern of indium tin oxide (ITO) configured as a square loop centered about a central vertical axis and a second pattern of ITO including four equidistant square patches, a second layer of glass attached to the first layer of glass and having a third pattern of ITO configured as a dipole having a cross shape with a center axis coaxial with the central vertical axis, and a third layer of glass attached to the second layer of glass and having a fourth pattern of ITO configured as five circular patches, with a first circular patch located coaxially with the central vertical axis and four equidistant circular patches.

The invention discloses a preparation method and application of ferrite-based micron-sized flaky microwave absorbent powder, and relates to the technical field of microwave absorbing materials.The preparation method comprises the following steps that S1, ferrite precursor tape casting slurry A is pretreated, and slurry B is obtained; s2, the slurry B is poured into a casting machine for casting, and a casting green tape C is obtained at an outlet of the casting machine; s3, stripping and removing the PET substrate on the tape casting green tape C to obtain a ferrite green tape sheet D; s4, sintering the ferrite green tape sheet D in sintering equipment, and cooling to room temperature to obtain a ferrite sheet E; and step S5, crushing the ferrite sheet E, and performing classified screening treatment to obtain the flaky ferrite absorbent powder. According to the invention, the design is reasonable, the flaky ferrite powder is used as the magnetic absorbent, compared with the traditional flaky carbonyl iron, the ferrite material has obvious lightweight and anticorrosion advantages, the labyrinth effect formed by the flaky structure can further improve the anticorrosion performance of the product, and impedance mismatching caused by eddy current loss is avoided.

A method for load detection in a cooking chamber of a cooking device is described. At least one cooking chamber climate value in the cooking chamber is acquired. A gradient of a temperature change is acquired using a temperature sensor associated with a microwave trap or a microwave absorber. The at least one cooking chamber climate value and the gradient of the temperature change are evaluated jointly to estimate the load in the cooking chamber of the cooking device. Furthermore, a cooking device for cooking food to be cooked is described.

This application belongs to the field of microwave absorber technology, and particularly relates to a frequency-selective microwave absorber. The frequency-selective absorber includes a support layer having a first surface and a second surface disposed opposite to each other; a first dielectric layer bonded to the first surface; a second dielectric layer bonded to the second surface; a loss layer bonded to the side of the first dielectric layer away from the first surface to absorb electromagnetic waves of a preset frequency band; and a transmission layer bonded to the side of the second dielectric layer away from the second surface, allowing electromagnetic waves of the preset frequency band to pass through. The support layer, the first dielectric layer, the second dielectric layer, the loss layer, and the transmission layer are all transparent structures. This application can solve the technical problem in the prior art where frequency-selective absorbers lack optical transparency.

This invention relates to a composite aerogel material, its preparation method, and its applications. The invention selects cobalt and carbon as components of the microwave absorber, utilizing the synergistic effect between the different components to maintain a wide effective absorption bandwidth while exhibiting strong electromagnetic wave attenuation. Chitosan aerogel is prepared using directional cryogenic casting, followed by a high-temperature carbonization reaction in a tube furnace to obtain an aerogel loaded with cobalt particles. The process of this invention is simple and easy to implement; the composite aerogel microwave absorber can be prepared through directional cryogenic casting and a one-step carbonization process.

This invention discloses a microwave absorber and its fabrication method. The microwave absorber includes multiple absorber units, each of which includes a dielectric layer and a patterned carbon-based conductive layer formed on the dielectric layer. The carbon-based conductive layer includes a central pattern and four peripheral patterns surrounding the central pattern. The central pattern includes a pair of parallel first vertical line segments and a first horizontal line segment connecting the middle of the first vertical line segments. Each first vertical line segment connects to two adjacent peripheral patterns. Each peripheral pattern includes a pair of parallel second vertical line segments and a second horizontal line segment connecting the middle of the second vertical line segments. The first vertical line segments connect to the second vertical line of one peripheral pattern and extend to the second horizontal line segment of another peripheral pattern. This microwave absorber facilitates bandwidth expansion and exhibits good broadband reflection suppression.

The invention belongs to the technical field of microwave absorbers, and particularly discloses a P-K wave band ultra-wideband microwave absorber which comprises a bottom plate, and a first frequency selection surface layer, a second frequency selection surface layer and an active frequency selection surface layer are sequentially arranged on the upper end face of the bottom plate in the first direction, a first spacing layer is arranged between the first frequency selection surface layer and the second frequency selection surface layer, a second spacing layer is arranged between the second frequency selection surface layer and the active frequency selection surface layer, and a third spacing layer is arranged between the active frequency selection surface layer and the bottom plate. Broadband high-efficiency absorption from a low-frequency P wave band to a high-frequency K wave band can be achieved, and good angle stability and polarization insensitivity are achieved.

The embodiment of the utility model provides a microwave oven, which belongs to the technical field of cooking and comprises a main oven, a microwave generator, an objective table and a microwave absorber. The main oven is provided with a cooking cavity and a microwave receiving hole communicated with the cooking cavity. The microwave generator is installed on the main oven, and microwaves generated by the microwave generator enter the cooking cavity through the microwave receiving hole. The objective table is located in the cooking cavity. The microwave absorber is installed on the objective table and used for absorbing microwaves in the cooking cavity and converting the microwaves into heat energy. According to the microwave oven, the microwave absorber is installed on the objective table and used for absorbing the microwaves in the cooking cavity and converting the microwaves into the heat energy, so that reflection of the microwaves in the microwave oven can be reduced, a standing wave field of the microwaves can be weakened, energy near food on the objective table is improved, and heating of the microwave oven is more uniform. And the microwave absorber can also reduce the energy reflected back to the microwave generator, so that the energy efficiency of the microwave oven can be improved, and the safety of the microwave oven can also be improved.

The invention discloses a composite hose based on micron-sized self-repairing microcapsules and microwave triggering and a preparation and repairing method of the composite hose, and relates to the technical field of co-extrusion hose manufacturing and self-repairing materials.According to the scheme, the preparation method comprises the steps that 1, the micron-sized self-repairing microcapsules containing a core material of epoxy resin-curing agent and nano calcium carbonate reinforcing filler and a urea-formaldehyde resin wall material are prepared; 2) spraying the surface of the enhancement layer to form a self-repairing layer, enabling the enhancement layer to pass through an extrusion die, and simultaneously extruding the inner surface and the outer surface by double-screw extrusion equipment to form an inner layer and an outer layer respectively; 3, carbonyl iron powder is added to the outer layer of the hose to serve as a microwave absorbent, and repairing is triggered within 30-60 seconds in cooperation with a handheld microwave generator. According to the method, repairing can be completed within 5 minutes after cracks appear, the repairing efficiency is larger than or equal to 85%, the change rate of the mechanical property of the hose is smaller than or equal to 5%, the annual average maintenance cost is reduced by 50% or above, meanwhile, plastic waste is reduced, and the medium leakage risk is reduced.

The invention relates to an antibacterial low-temperature polycaprolactone composition suitable for microwave heating and a preparation method and application thereof in the field of medical polymer materials. The antibacterial low-temperature polycaprolactone composition suitable for microwave heating comprises the following blended components: polycaprolactone, a nano filler, a microwave absorbent and a supported antibacterial agent, the total amount of the polycaprolactone and the nano filler is 100 parts by weight, the polycaprolactone accounts for 42-95 parts by weight, and the nano filler accounts for 5-58 parts by weight; 0.3-5 parts by weight of a supported antibacterial agent; and 0.5-7 parts by weight of a microwave absorbent. The odor of the polycaprolactone composition can reach grade 3.5 or below, the microwave heating performance is greatly improved, meanwhile, the rigidity of the material is effectively improved, the operation process is simple and reliable, the input cost is low, and the polycaprolactone composition is suitable for the field of medical surgical materials.

The application adopts microwave pyrolysis of waste plastic polyethylene terephthalate (PET) to prepare porous carbon catalytic material, and applies it to peroxymonosulfate (PMS) catalytic activation to degrade organic pollutants such as carbamazepine (CBZ). Microwave absorber cobalt nitrate and initial carbonized alpha-cellulose are used to assist the carbonization of waste plastic PET, and thiourea is used as a metal sulfidation reagent to prepare the waste plastic derived porous carbon material catalyst in a commercial microwave oven with a power of 800W for 10 minutes. The formation of cobalt oxide, the generation of cobalt sulfide, the introduction of C=O and oxygen vacancies, and the increase of specific surface area are all conducive to the improvement of the degradation performance of the catalyst to organic pollutants. The best catalyst S 0.3 -Co@P2C can achieve 100% CBZ degradation in 15 min, and the rate constant is 0.7445 min ‑1 . Compared with the traditional pyrolysis method, the microwave treated carbon material is not only more conducive to the formation and exposure of active sites (CoS and CoO) in the catalytic material, but also conducive to the generation of SO4 •‑ ·OH, O2 •‑ and 1 O2 by PMS catalytic activation. In addition, the introduction of PET is conducive to the formation of C=O in the catalytic material to promote PMS activation and accelerate the non-radical pathway to degrade CBZ.

This invention discloses a high-efficiency microwave absorber in the 2GHz-18GHz band based on metamaterials and composite materials, belonging to the field of electromagnetic microwave absorber technology. The absorber is composed of a fiber-reinforced laminate, a dielectric layer, a PET layer, and a metamaterial layer stacked together. The fiber-reinforced laminate consists of fibers embedded in a substrate, the substrate having a square cross-section, while the fiber portion uses materials such as SiC or glass with a grid-like cross-section. The dielectric layer uses the same material as the substrate of the fiber-reinforced laminate. The metamaterial layer uses an ITO conductive film with an etched circular pattern. This high-efficiency microwave absorber combining metamaterials and composite materials, through careful design, can achieve electromagnetic wave attenuation of over -20dB in the 2GHz-18GHz frequency band. The composite material portion achieves the absorption effect by converting electromagnetic energy into heat energy, while the metamaterial portion dissipates electromagnetic energy through resonance, thus achieving the absorption effect.

This application relates to the technical field of microwave absorbing materials, and in particular to a high-power electromagnetic compatibility (EMC) composite microwave absorbing material and its preparation method. The high-power EMC composite microwave absorbing material comprises an aramid paper honeycomb core and a microwave absorbing resin composite solution coated on the surface of the aramid paper honeycomb core. The microwave absorbing resin composite solution comprises the following raw materials in parts by weight: 2-7 parts microwave absorber, 30-40 parts solvent-based binder, 1-5 parts dispersant, 0.1-0.8 parts additives, and 50-65 parts solvent. The high-power EMC composite microwave absorbing material prepared by this application has the advantages of withstanding high-power radiation, good broadband absorption performance, and stable product performance, meeting the core requirements of EMC anechoic chambers for microwave absorbing materials.

One embodiment of the present invention provides a method for manufacturing an electromagnetic wave absorbing material, the method comprising: a step of mixing a powder containing at least one selected from the group consisting of a Ca precursor, a Ba precursor, a Sr precursor, an Re precursor, an Me precursor, a Co precursor, and an Fe precursor; a step for performing a first heat treatment on the mixed powder; a step of ball-milling the powder after the heat treatment; and a step of performing a second heat treatment on the powder after the ball milling, thereby manufacturing an electromagnetic wave absorbing material including W-type hexagonal ferrite represented by the chemical formula 1. The present invention is a research result of a development subject of a microwave absorber for 5G communication (28GHz), which is supported by the Chang star (strain) and is executed by a first university production and study association group.

A thermoplastic composition includes: a) from about 30 wt% to about 85 wt% of a polyamide resin; b) from about 1 wt% to about 25 wt% of a polycarbonate-siloxane copolymer; c) from about 5 wt% to about 40 wt% of a glass fiber; and d) a carbon filler component including d1) from greater than 0.1 wt% to less than 1 wt% carbon fiber, d2) from greater 1 wt% to less than 5 wt% carbon black, or d3) from greater than 1 wt% to less than 5 wt% multi-wall carbon nanotubes (MWCNTs). The composition exhibits a percent Absorbed Power measured in Transmission mode of at least 70% when observed according to a Free Space method at a frequency of 77 GHz. The composition exhibits an ε' of at least 5 and an ε" of no more than 4, wherein ε' and ε" are evaluated according to a Free Space Method.

This invention discloses a method for enhanced microwave remediation of polycyclic aromatic hydrocarbon (PAH) contaminated soil, comprising the following steps: S1, soil selection; S2, soil pretreatment; S3, preparation of enhancing agents: the enhancing agents include a first microwave absorber and a second microwave absorber; the first microwave absorber is a biochar microwave absorber; the second microwave absorber includes manganese dioxide, magnetite, persulfate, and self-healing microcapsules doped with sodium dodecyl sulfate with a particle size of 1-3 mm; S4, remediation treatment; the self-healing microcapsules doped with sodium dodecyl sulfate prepared by this invention utilize the gradual release of sodium dodecyl sulfate encapsulated in the microcapsules as the temperature rises, enhancing the desorption efficiency of PAHs from soil particles, resulting in a significant increase in desorption rate; and the acid and alkali resistance of the polydopamine coating distributed on the outer side of the capsule wall adapts to complex soil environments, making the remediation effect more stable.

In a method for producing a low-molecular-weight fluorine compound by decomposing a fluororesin by bringing a heated microwave absorber into contact with a material containing a fluororesin in a reaction vessel provided with a carrier gas inlet and a decomposition gas outlet, (i) a temperature difference Delta 1(TR−TI), obtained by subtracting the carrier gas temperature TI (° C.) from the temperature TR (° C.) of the heated microwave absorber, is set to be more than 500° C. and / or (ii) a temperature difference Delta 2(TR−TE), obtained by subtracting the product gas temperature TE (° C.) at the outlet from the temperature TR (° C.), is set to be 300° C. or higher.

The invention discloses a microwave heating hydrophobic coating as well as a preparation method and application thereof. The microwave heating hydrophobic coating comprises the following components in percentage by mass: 55-60% of matrix resin, 10-30% of a microwave absorbent, 8-12% of a hydrophobic modifier, 2-4% of a dispersing agent, 5-7% of a curing agent, 0.1-0.3% of a toughening agent, 0.45-0.6% of an interface modifier and the balance of a solvent, the matrix resin is epoxy modified organic silicon resin; the microwave absorbent is composed of nano SiC particles and nano Fe3O4 (at) SiO2 particles. The microwave heating hydrophobic coating successfully realizes collaborative design of microwave heating and hydrophobic functions, so that electromagnetic waves can be efficiently converted into heat energy to directionally act on an ice layer on the surface of concrete, rapid and low-energy-consumption deicing without damaging a matrix is realized, the hydrophobic capacity, durability and crack resistance of a concrete product can be improved, and the service life of the concrete product is prolonged. The deicing device can be widely applied to the field of surface deicing of concrete products in plateau alpine regions.

Thermoplastic compositions include: (a) a polycarbonate resin: (b) a poly (carbonate-siloxane) copolymer having a siloxane content of at least about 5 wt %; and (c) from about 0.15 wt % to about 4.5 wt % of a carbon nanotube filler. The carbon nanotubes have an average diameter of from about 8-12 nanometers (nm), a length of about 5 micron (μm) or less, a surface area of about 220 square meters per gram (m2 / gr) or higher, and a volume resistivity lower than about 10−2 Ohm·centimeters (Ohm·cm). The composition has a volume electrical resistivity of at least about 1.0E+06 Ohm·cm as determined in accordance with ASTM D257. A molded sample of the composition has a percent absorbed power measured in Transmission mode of at least about 60% when observed according to a Free Space method at frequencies from about 75 GHz to 110 GHZ.

The invention provides a flower-like multi-shell hollow metal oxide low-frequency microwave absorbent and a preparation method and application thereof, the flower-like multi-shell hollow metal oxide low-frequency microwave absorbent has a flower-like morphology, and the flower-like morphology is formed by stacking metal oxide nanoparticles with a multi-shell hollow structure, the number of shell layers of the multi-shell hollow structure is at least three. Wherein the flower-shaped morphology shows that a large number of wrinkles are formed on the surface of a spherical structure, the whole flower-shaped morphology is in a petal-like appearance, the morphology and the multi-shell hollow structure are in synergistic effect, the multiple reflection and scattering effects of incident microwaves can be enhanced, the interaction time of the microwaves and the material is prolonged, and then the microwave absorption performance of the low-frequency wave band (2-8 GHz) is improved. The invention also provides a preparation method and application of the microwave absorbent.

The invention relates to a medical polycaprolactone composition capable of being heated by microwaves as well as a preparation method and application of the medical polycaprolactone composition, belonging to the field of medical polymer materials. The medical polycaprolactone composition capable of being heated by microwaves is prepared from the following blended components in parts by weight: 40 to 90 parts of polycaprolactone, 10 to 60 parts of nano filler, 1 to 6 parts of microwave absorbent and 0 to 10 parts of heat conducting agent, wherein the sum of the weight of the polycaprolactone and the nano filler is 100 parts. The odor of the polycaprolactone composition can reach grade 3.5 or below, the microwave heating performance is greatly improved, meanwhile, the mechanical property of the material is good, and the polycaprolactone composition can be applied to the field of medical surgical materials.

The invention provides a microwave pyrolysis recovery method for waste circuit boards, and relates to the technical field of waste recovery. The method provided by the invention comprises the following steps: stripping an electronic element on the waste circuit board, and crushing to obtain recycled powder; mixing the recycled powder with a microwave absorbent to obtain mixed powder; the mixed powder is subjected to microwave pyrolysis at the temperature of 400-600 DEG C, the microwave power of 600-800 W and the protective atmosphere, and then a metal enriched material is obtained through separation; and grinding the metal enriched material, and separating under the action of a leaching agent to obtain metal components. According to the method, the organic nonmetal components in the waste circuit board are subjected to pyrolysis separation by utilizing microwave pyrolysis, so that the metal components are quickly enriched, dust pollution is favorably reduced, and generation and emission of toxic pollutants are inhibited.

The present application relates to the technical field of solid waste treatment, and provides a method for preparing high-purity hydrogen by using waste plastic self-derived carbon nanotubes, which comprises the following steps: S1, mixing plastic and multi-element nanometer metal catalyst, adding microwave absorber to obtain a mixture, wherein the multi-element nanometer metal catalyst comprises Ni, Al and Fe; S2, microwave heating the mixture in inert gas to obtain hydrogen and self-derived carbon nanotubes; S3, reloading the self-derived carbon nanotubes with the multi-element nanometer metal catalyst, adding in step S1, and microwave heating reaction in step S2 to obtain high-purity hydrogen. The method for preparing hydrogen by using waste plastic self-derived carbon nanotubes can further improve the hydrogen yield by more than 20%, and the hydrogen yield reaches 62.55 mmol / g, and the hydrogen purity is greater than 90 vol%.

Control device (200) for an internal combustion engine (100), wherein the internal combustion engine (100) comprises the following: a motor body (1); a catalyst device (34) configured in an exhaust gas line of the engine body (1) and comprising an exhaust gas purification catalyst with at least one oxidation function and a microwave absorber contained in a catalyst coating layer (342) formed in a substrate (341); and a microwave transmitter (35) for irradiating the catalyst device (34) with microwaves, wherein the control device (200) is configured such that, if an internal combustion engine start is requested when the temperature of the exhaust gas purification catalyst is lower than a predetermined temperature, it causes the microwave transmitter (35) to irradiate the catalyst device (34) with microwaves and to operate the engine body (1) in such a way that the air-fuel ratio of exhaust gas expelled from the engine body (1) becomes a predetermined lean air-fuel ratio, which is leaner than a stoichiometric air-fuel ratio. the control device (200) is further set up as follows: to calculate a delay time until the combustion engine start is requested; and to cause the microwave transmitter (35) to irradiate the catalyst device (34) with microwaves when the delay time is a predetermined time or less, and when the microwave transmitter (35) is caused to irradiate the catalyst device (34) with microwaves without operating the engine body (1), the specified time is a period of time that allows the temperature of the exhaust gas purification catalyst to be increased to a temperature at which a specified exhaust gas purification performance is achieved in the catalyst device (34), when the engine body (1) is operated in such a way that the air-fuel ratio of the exhaust gas becomes the stoichiometric air-fuel ratio.

The application discloses a kind of active site adjustable porous carbon catalyst based on waste plastics microwave pyrolysis preparation and its application in efficient activation peroxymonosulfate (PMS) degradation organic pollutants. The method is that polycarbonate (PC) is mixed with polypropylene (PP) or polyether sulfone (PES) waste plastics as carbon source, sodium hydroxide is used as microwave absorber and pore-forming agent, and microwave one-pot solid-phase pyrolysis method is used to prepare metal-free porous carbon catalyst (PC1PP3 and PC1PES3) under 800W power irradiation for 2 minutes. The application realizes directional switching of catalytic mechanism by regulating waste plastic components: doping PP significantly improves the graphitization degree, specific surface area (up to 934.99m 2 / g) and defect vacancy concentration of the material, and constructs a direct electron transfer channel; doping PES introduces thiophene sulfur sites and modifies the electronic structure of C=O sites, which promotes the generation of singlet oxygen ( 1 O2). The obtained catalyst shows excellent sulfamethoxazole (SMX) degradation performance in PMS activation system, and the highest reaction rate constant can reach 0.257min −1 . Moreover, PC1PP3 / PMS system realizes PMS utilization rate up to 92.5%. The application not only realizes high-value utilization of waste plastics, but also provides a new way for low-consumption drug and high-efficiency water treatment technology.

A thermoplastic composition includes: a thermoplastic polymer component including a polyester; and from greater than 0.10 wt% to about 1.95 wt% carbon nanotube (CNT) filler. A 6 in x 8 in x 1 / 8 in molded sample of the composition has a percent absorbed power measured in transmission mode of at least 60% when observed at a frequency of 77 GHz according to the free space method. In some embodiments, the polyester includes polybutylene terephthalate (PBT). Further embodiments include an article (e.g., radar sensor, camera, electronic control unit, etc.) that includes a molded part that includes a microwave absorbing material (absorber). The article may have at least two openings that allow the transmission of microwave radiation between a transmitting antenna and a receiving antenna located in / on the sensor's printed circuit board.

This invention utilizes microwave-assisted rapid preparation of Ni-ZIF-8 derived carbon materials. Using this material as the main component, sulfur is loaded as the active material to prepare the cathode material, which is then assembled into an RT Na-S battery. The process is simple, structurally stable, and exhibits excellent electrochemical performance, possessing certain practical application value. By introducing metallic nickel to modify the basic structure of ZIF-8, the derivative acquires certain catalytic capabilities, and the precursor Ni-ZIF-8 is prepared using a simple synthetic reaction. Then, by introducing a microwave absorber, rapid carbonization is achieved under microwave irradiation to obtain the Ni-ZIF-8 derived carbon material. The drastic temperature change causes the bulk structure of the precursor to break down during carbonization, preserving the high specific surface area and abundant active sites of traditional ZIFs while enhancing the material's conductivity. Relying on the high specific surface area, abundant active sites, and excellent conductivity of the Ni-ZIF-8 derived carbon material, the synergistic effect of "physical adsorption-chemical adsorption-catalytic conversion" effectively suppresses sodium polysulfide shuttle, reduces internal battery polarization, and exhibits excellent electrochemical performance.

This invention discloses a continuous microwave thermal conversion device and method for recovering glass fiber from decommissioned wind turbine blades, achieving efficient decomposition of organic components and clean recovery of inorganic fibers from decommissioned wind turbine blades. This invention utilizes the self-heating effect of materials and microwave absorbers under microwave action, significantly reducing reaction temperature and energy consumption. Uniform pyrolysis of materials is achieved in the microwave pyrolysis unit through a feeding hopper and a rake-type stirring device; the pyrolysis residue solids then enter the microwave oxidation unit for further oxidation and decomposition. The generated inorganic solids are separated by cyclone separation to obtain clean glass fiber, while the microwave absorber is sorted and returned to the system for recycling. The material residence time is controlled by adjusting the furnace inclination, and precise control and power optimization are achieved for different temperature zones using a multi-stage variable frequency microwave source. This enables continuous and efficient processing of large-size decommissioned wind turbine blades, effectively reducing secondary pollution and ensuring the quality of the recovered glass fiber while lowering the temperature and energy consumption of traditional heat recovery processes.

This invention belongs to the technical field of additive manufacturing and discloses a method and product for forming ceramic preforms based on microwave in-situ sintering. The method includes the following steps: preparing a microwave absorber and SiC powder; performing three-dimensional printing using the SiC powder; during the three-dimensional printing process, after printing and forming a slice layer, spraying the microwave absorber onto the surface of the slice layer; then microwaving the slice layer to perform in-situ heating and sintering, thereby forming each slice layer layer by layer to obtain the desired ceramic preform. This invention also discloses the product obtained by the above method. This invention solves the problems of organic binders easily clogging the ink path and corroding the printhead, and low preform strength. Furthermore, the in-situ sintering method eliminates the need for subsequent curing and degreasing heat treatment processes, simplifying the manufacturing process.

The application discloses a kind of based on micron self-repairing microcapsule and microwave trigger composite hose and its preparation and repair method, it is related to the technical field of self-repairing material and co-extrusion hose manufacturing, scheme includes:1) preparation epoxy resin-curing agent+nanometer calcium carbonate reinforcing filler-containing core material, urea-formaldehyde resin wall material micron self-repairing microcapsule;2) self-repairing layer is formed by spraying on the surface of reinforcing layer, reinforcing layer passes through extrusion die, and inner layer and outer layer are formed by extruding respectively on inner surface and outer surface by double screw extrusion equipment;3) carbonyl iron powder is added as microwave absorber in the outer layer of hose, and 30-60 seconds trigger repair is realized by cooperating handheld microwave generator.The application can complete repair within 5 minutes after crack appears, repair efficiency is greater than or equal to 85%, mechanical property change rate of hose is less than or equal to 5%, annual average maintenance cost is reduced by more than 50%, while reducing plastic waste generation, reducing medium leakage risk.