98results about How to "Increase stress" patented technology

The invention relates to an integrally-formed hollow-structure Pick racket and a preparation method thereof, and belongs to the technical field of Pick rackets. The hollow cavity shell is filled with the foam core layer, an opening is formed in the hollow cavity shell, and the foam core layer is obtained by conducting heat treatment foaming on a foaming raw material; the method further comprises the following steps that an integrally-formed hollow cavity shell with an opening is obtained through a blow molding technology; the hollow cavity shell is filled with foaming raw materials; the filled hollow cavity shell is subjected to heat treatment, so that the foaming raw materials are foamed, expanded and fused in the shell, and a foam core layer tightly combined with the shell is formed; according to the Pick racket, an adhesive interface existing in a traditional spliced racket is structurally and thoroughly eliminated, the risk of adhesive failure and layering after long-term use or damp is fundamentally avoided, the structural integrity of the racket is greatly improved, and the durable life of the racket is greatly prolonged.

This utility model discloses a container, comprising a frame, a top panel, side panels, end panels, and door panels. At least one of the top panel, side panels, end panels, and door panels includes at least two layers: a steel plate and a composite material plate. The steel plate is fixedly connected to the frame. The composite material plate is located on at least one side of the steel plate facing inwards and outwards, and is fixedly connected to the steel plate. The composite material plate has the same shape as the steel plate to be integrally fitted with it, or the composite material plate is flat and partially fitted with the steel plate. According to this utility model, at least one of the top panel, side panels, end panels, and door panels is configured as a two- or multi-layer structure, wherein the side of the steel plate facing inwards and / or the side facing outwards is a composite material plate. This design allows the container to meet long-term requirements for wear resistance, acid and alkali resistance, salt spray resistance, and mildew resistance. Furthermore, container wall maintenance is relatively simple and inexpensive.

This invention discloses a silicon nitride grinding device, relating to the technical field of silicon nitride grinding devices. The device includes a support frame and a collection box. A conical cylinder is fixedly mounted on the upper surface of the support frame, and the collection box is disposed on the lower surface of the support frame. A feed trough is fixedly mounted on the upper surface of the conical cylinder, and a water storage tank is fixedly mounted on the circumferential surface of the conical cylinder. A water spray head is provided on the inner wall of the conical cylinder. A rotating shaft is rotatably mounted on the upper surface of the inner wall of the conical cylinder, and a grinding head is fixedly mounted on the lower surface of the rotating shaft. A grinding disc is fixedly mounted on the inner wall of the conical cylinder. A material unblocking device is also provided inside the conical cylinder. When the feed trough is blocked, it affects the grinding efficiency, potentially causing a decrease in output or production stoppage. Blockage causes material to accumulate in the feed trough, increasing the pressure and stress on the material. If this blockage persists for a long time, it may damage the feed trough.

The invention provides an epoxy modified cement-based material, the epoxy modified cement-based material comprises an organic phase structure and inorganic crystals, and the inorganic crystals are radially distributed on the surface of the organic phase structure; the organic phase structure is a spherical or sphere-like structure with the diameter of 3-15 microns; the inorganic crystal is of a needle-shaped, rod-shaped or sheet-shaped structure with the length being 0.3-3 microns and the diameter being 0.05-0.5 microns. The epoxy modified cement-based material disclosed by the invention shows good adhesion and dispersion resistance under water or in a humid environment, can realize rapid underwater construction, and keeps stable performance for a long time under harsh conditions such as a marine environment and a humid environment; the engineering requirements of multiple fields such as building structure repairing, underwater repairing, rapid first-aid repair, ocean protection and road and bridge engineering are met, and the integration of high strength, high toughness, strong interface bonding and long-acting durability is realized.

A substrate to be connected is prevented from being damaged. An electronic component (100) is provided with a substrate (1) to be connected and a flexible printed wiring board (3). The substrate (1) to be connected has a first base sheet (11), a circuit (13) formed on the first base sheet (11), a first terminal forming portion (E1) formed on at least one end of the first base sheet, and a plurality of first terminals (15) formed on the first terminal forming portion (E1) and connected to the circuit (13). The flexible printed wiring board (3) has a second base sheet (31), a second terminal forming portion (E2) formed on at least one end of the second base sheet, and a plurality of second terminals (33) formed on the second terminal forming portion (E2) and connected to the first terminals (15). A wide portion (31a) extending in an X direction, which is a direction in which the plurality of second terminals (33) are arranged, is formed on the second terminal forming end portion (E2). Dummy terminals (39, 39 ') are formed on at least one of the wide portion (31a) and a portion of the first base sheet (11) facing the wide portion (31a).

The present application relates to the technical field of high molecular antifogging coating, and particularly relates to a supermolecular coated shed film antifogging coating solution, a preparation method and application thereof, wherein acrylic acid, acrylamidoalkyl sulfonic acid, hydroxyalkyl acrylate and double-ene crosslinking monomer are used for tetra-copolymerization to construct a supermolecular matrix with carboxyl, sulfonic acid group, hydroxyl side group and crosslinking network, and a spandex antifogging agent is introduced in situ in the matrix, hydrogen bond and hydrophobic association synergistic effect between the side group functional groups and the spandex molecules are used to realize supermolecular coating, and then pH adjustment and functional additive compounding are performed to obtain the coating solution. The present application solves the problems of easy migration and precipitation of the traditional antifogging agent, coating brittleness, short effective period, and the obtained coating has comprehensive performances of long-acting antifogging, high light transmission, strong adhesion, flexible and bending-resistant, water-resistant and aging-resistant, and room temperature rapid curing, and is suitable for antifogging treatment of various agricultural shed films and greenhouse transparent materials.

This invention relates to the field of battery technology, specifically to a composite negative electrode current collector, its preparation method, and its application. The composite negative electrode current collector of this invention includes a polymer material layer, a lithium replenishment layer, and a conductive metal layer. The lithium replenishment layer is located on at least one surface of the polymer material layer, and the conductive metal layer is located on the surface of the lithium replenishment layer away from the polymer material layer. The lithium replenishment layer includes a composite lithium material comprising a lithium metal core and a lithium compound coating layer covering the surface of the lithium metal core. The conductive metal layer has multiple through-hole structures. The composite negative electrode current collector of this invention, through the coordination of its various layer structures, is beneficial for improving the storage performance of the negative electrode, reducing battery impedance, shortening the electrolyte wetting time, enhancing lithium replenishment capacity, preventing the formation of lithium dendrites, and improving battery safety performance.

The application discloses a MEMS structure and a MEMS sensor for optimizing anchor point design, comprising a structure anchor point, an elastic beam group, a movable mass block, a differential capacitor group, a Cap layer and a Sub layer; wherein the structure anchor point comprises three groups of sensitive structure anchor points and lead anchor points corresponding to the three groups of sensitive structure anchor points, the sensitive structure anchor points are connected with the lead anchor points through the elastic beam group; the first group and the third group of sensitive structure anchor points are connected with the movable mass block through the differential capacitor group respectively, and the second group of sensitive structure anchor points is connected with the movable mass block through the elastic beam group; the sensitive structure anchor points are anchored with the Cap layer and are not anchored with the Sub layer, the lead anchor points are anchored with the Cap layer and the Sub layer. The application suspends the MEMS movable structure, effectively blocks the direct transmission path of the packaging stress to the MEMS anchor point, and makes the stress need to be transmitted through a more tortuous path, so that the transmission distance is significantly increased, and the stress acting on the MEMS anchor point is greatly attenuated.

This utility model discloses a secondary battery and an electrical device, belonging to the field of battery technology. The secondary battery includes a wound cell, which includes a flat region and a corner region. The wound cell includes a positive electrode, a negative electrode, and a separator between the positive and negative electrode. The positive electrode includes a positive current collector and a flame-retardant layer and a positive active material layer sequentially disposed on at least one surface of the positive current collector. This utility model controls the thickness relationship between the flame-retardant layer and the positive active material layer in the flat region and the corner region, thereby significantly improving the lithium plating phenomenon at the corner.

The application discloses a kind of copolymer organic semiconductor devices based on isolation and interconnection and preparation method, including substrate, photoetching blocking layer, insulating isolation layer, N organic field effect transistor and N-1 interconnection line;Photoetching blocking layer includes isolation layer and inorganic dielectric layer;Isolation layer is opened with N longitudinal through isolation groove along length direction;Inorganic dielectric layer includes lower dielectric layer and upper dielectric layer;Lower dielectric layer is located in N isolation, and upper dielectric layer is laid on the top of isolation layer and lower dielectric layer;Each organic field effect transistor includes semiconductor layer, source, drain and gate;Semiconductor layer is laid in the isolation groove at the bottom of corresponding lower dielectric layer section, and its material is organic copolymer.The application effectively utilizes isolation groove and photoetching blocking layer, and the semiconductor layer of different semiconductor materials is wrapped and isolated, so as to realize the integration of different organic field effect transistors on the same substrate, and the organic field effect transistor can realize effective interconnection.

The application provides a brake disc and a vehicle, and belongs to the technical field of vehicle braking systems, and comprises a disc cap, an outer disc and an inner disc; the disc cap is coaxially fixed to a wheel hub; the outer disc is coaxially connected to the outer periphery of the disc cap, and the outer surface of the outer disc forms an outer braking surface ring; the inner disc is coaxially connected to the outer disc as a whole through multiple ventilation ribs, the inner surface of the inner disc forms an inner braking surface ring, and the outer diameters of the inner braking surface ring and the outer braking surface ring are consistent; a plurality of heat dissipation channels are formed between the outer disc and the inner disc based on the ventilation ribs, and each ventilation rib is a variable cross-section gradient structure with the cross-sectional area increasing from the middle to the two ends in the respective axial direction. The brake disc provided by the application adopts the variable cross-section gradient structure with the middle being thin and the two ends being thick, can optimize the thermal stress distribution and mechanical properties of the ventilation rib, reduces the risk of cracks, the middle being thin helps to improve the air flow speed, and the two ends being gradually thickened helps to form stable airflow, thereby enhancing the convective heat dissipation efficiency and improving the heat dissipation performance.

The invention discloses a partition induction regulation and control device and method for high-strength steel laser cladding. The partition induction regulation and control device comprises a welding mechanical arm, a laser head, a shielding gas assembly, a magnetic induction coil, an infrared thermometer and a control system. The laser head is clamped at the tail end of the welding mechanical arm; the nozzle is connected with the laser head; the plurality of groups of magnetic induction coils are relatively independent, are arranged on the laser head through a coil bracket, and are used for performing zoned temperature control on a cladding area; the infrared thermometer is arranged on the coil bracket and is used for measuring the temperature of a cladding area; the laser head, the welding mechanical arm, the shielding gas assembly, the magnetic induction coil and the infrared thermometer are all connected with the control system. According to the zoning induction regulation and control device, zoning temperature control is conducted on a cladding area, precise regulation of local temperature is achieved, infrared temperature measurement real-time feedback and closed-loop control are combined, the uniformity and metallurgical bonding strength of a cladding layer can be remarkably improved, and cracks and defects are reduced.

The invention discloses modified chickpea starch and a preparation method and application thereof, and belongs to the technical field of food processing.The modified chickpea starch is obtained by adding oat beta glucan into chickpea starch, then conducting pretreatment on the chickpea starch, conducting extrusion treatment on the chickpea starch through a double-screw extruder, and cooling, drying and smashing an extruded sample; wherein the addition amount of the oat beta glucan is 3 to 15 percent; the temperature of the extrusion treatment is 80-120 DEG C. The chickpea starch is subjected to compound modification by adopting a twin-screw extrusion technology in cooperation with oat beta glucan, and a starch semi-crystalline layer is deeply destroyed to realize deep regulation and control of a multi-scale structure; meanwhile, the oat beta glucan and the starch form a hydrogen bond network, so that the problem of excessive modification of chemical modification is avoided, and the thermal stability, the shear resistance and the aging resistance of the starch are remarkably improved; no chemical reagent participates in the whole process, no chemical residue risk exists, and the method has the advantages of continuous production, large treatment capacity, low energy consumption and the like.

The application discloses a low-stray inductance power module packaging structure and a packaging method, and relates to the technical field of semiconductor packaging. The packaging structure comprises a DBC substrate and a chip set arranged on the DBC substrate, and the chip set comprises at least one chip. A target chip in the chip set is electrically connected with the DBC substrate through an interconnecting conductive sheet. A plurality of stress release holes are arranged on the interconnecting conductive sheet and penetrate through the interconnecting conductive sheet. The packaging structure effectively reduces the stray inductance of the power module and improves the reliability of the power module packaging.

The utility model discloses a steel grating with reinforcing structure, including steel frame, the utility model discloses through being equipped with a plurality of first flat steel and a plurality of second flat steel respectively in steel frame, and first flat steel and second flat steel insert and connect, in a plurality of first flat steel, the first steel wire rope is inserted in common, and first flat steel and first steel wire rope junction utilize spacing pad and fix, in a plurality of second flat steel, the second steel wire rope is inserted in common, and second flat steel and second steel wire rope junction also utilize spacing pad and fix, the both ends of first steel wire rope and second steel wire rope are equipped with support block, the threaded rod that support block one end is equipped with inserts nut member in, in the first flat steel and second flat steel in steel frame, the first steel wire rope and second steel wire rope are inserted respectively, and utilize nut member and threaded rod cooperation adjustment tightness, prevent the whole steel grating to be in sinking state, avoided the relaxation after long time use, increased the support force and service life.

The present application relates to the field of organic solar cells, and provides a kind of full asymmetric small molecule donor SMD-Asy and its preparation method and application.The SMD-Asy is connected by Stille coupling from asymmetrically substituted conjugated BDTT core and acceptor unit, and the side chain and main chain structure are all asymmetrically distributed.The preparation of the small molecule donor includes: constructing thiophene and benzo dithiophene diketone BDTT intermediate, introducing long-chain alkoxy side chain under phase transfer catalysis condition, obtaining tin precursor by low-temperature lithiation, and then coupling with halogenated acceptor unit to obtain target molecule.Due to the simultaneous asymmetric design of main chain-side chain, SMD-Asy can regulate the phase separation scale and chain conformation of blended film as the third component in PM6:Y6 system, thereby improving the hole / electron transport balance and mechanical ductility, so that the device can ensure high photovoltaic performance while improving the cracking strain rate.The small molecule donor of the present application is suitable for flexible and stretchable organic solar devices.

This invention discloses a silicon-carbon composite anode material, its preparation method, and its applications. The preparation method includes: preparing a nitrogen-doped porous carbon framework from a carbon source, a nitrogen source, a pore-forming agent, and a soft template agent; surface-modifying the nitrogen-doped porous carbon framework with a silane coupling agent; subjecting the surface-modified nitrogen-doped porous carbon framework to chemical vapor deposition to obtain a silicon-carbon composite intermediate; and carbon-coating the silicon-carbon composite intermediate to form the silicon-carbon composite anode material. This invention improves the interfacial bonding strength between silicon and the carbon framework through chemical anchoring, and provides sufficient buffer space for silicon volume expansion through the synergistic pore-forming effect of the pore-forming agent and the soft template agent, thereby improving cycle stability. All steps are conventional chemical unit operations, and the raw materials used are all industrial-grade chemicals. The equipment requirements are low, and it is easy to scale up production.

This invention relates to a high thermal conductivity rare-earth copper-chromium alloy and its preparation method, belonging to the field of alloy material technology. The chemical composition of the copper-chromium alloy includes: 0.5-1.0 wt% Cr, 0.01-0.05 wt% Zr, 0.005-0.015 wt% Ce, no more than 0.005 wt% unavoidable impurity elements, and the balance being Cu. By adding trace amounts of cerium and zirconium to the copper-chromium alloy, this invention not only utilizes the grain boundary purifying effect of cerium in the alloy system and reduces the scattering of thermally conductive electrons by solid-solution Cr and Zr atoms, thereby significantly reducing the adverse effects of solid-solution chromium and zirconium atoms on the thermal conductivity of copper, but also utilizes the synergistic effect of zirconium and chromium to significantly improve the thermal conductivity, stress relaxation resistance, and high-temperature strength of the copper-chromium alloy. The high thermal conductivity rare-earth copper-chromium alloy of this invention has excellent thermal conductivity and high-temperature strength, making it suitable for large-scale application as an electrical contact material.

This utility model discloses a rotary joint and a crane, relating to the field of hydraulic oil conveying technology. The rotary joint includes an oil delivery shaft, an oil supply sleeve, and an oil distribution sleeve. The oil delivery shaft has at least two independent oil delivery channels inside. The oil supply sleeve is rotatably fitted onto the first end of the oil delivery shaft and has oil supply channels corresponding to the corresponding oil delivery channels, which are connected to each other. The oil distribution sleeve is rotatably fitted onto the second end of the oil delivery shaft and has oil distribution channels corresponding to the corresponding oil delivery channels, which are connected to each other. The oil delivery shaft is used to convey hydraulic oil between the oil supply sleeve and the oil distribution sleeve. The pipe connected to the oil supply sleeve and the rotating mechanism connected to the oil distribution sleeve can both rotate coaxially relative to the oil delivery shaft, which can improve the problem in related technologies where the rotary joint is subjected to a counter-torque, causing fatigue stress in the connected fixed pipe, resulting in loosening or damage.

This invention relates to the field of polymer technology and discloses a method for producing polyethylene resin for geomembranes. A dual-loop reactor is used, with ethylene as the raw material, 1-hexene as the comonomer, isobutane as the diluent, and an aluminum-modified supported chromium catalyst for catalysis; the chromium catalyst has a specific surface area of ​​280–330 m². 2 / g, pore volume of 2.3-2.8mL / g, chromium content of 2-4wt%, aluminum content of 1-5wt%; slurry density of the first reactor is 510-520kg / m³ 3 The slurry density in the second reactor is 530-540 kg / m³. 3 The ethylene concentration in the first reactor is 3.5-4.5 mol%, and the ethylene concentration in the second reactor is controlled at 6-6.5 mol%. The temperature in the first reactor is controlled at 94-96℃, and the temperature in the second reactor is controlled at 93-95℃. The pressure in the first reactor is controlled at 3.7-3.9 MPa, and the pressure in the second reactor is controlled at 3.9-4.1 MPa. The residence time in the first reactor is 70-90 min, and the residence time in the second reactor is 40-50 min. The polyethylene resin used in the geomembrane has low density and soft material, which is beneficial for downstream construction and has good processing performance.

The application relates to an ultra-low-loss large-effective-area optical fiber, which comprises, from inside to outside along the radial direction of the optical fiber, a core layer, a first gradient layer, an inner cladding layer, a second gradient layer, a sunken cladding layer, a third gradient layer, a transition cladding layer, a fourth gradient layer and an outer cladding layer; the core layer is chlorine-boron co-doped or chlorine-fluorine co-doped silica and is not doped with germanium; the first gradient layer, the inner cladding layer, the second gradient layer, the sunken cladding layer, the third gradient layer, the transition cladding layer and the fourth gradient layer are all fluorine-boron co-doped silica; and the outer cladding layer is pure silica. The application can solve the optical fiber attenuation problem caused by the viscosity imbalance of the existing optical fiber structure while having ultra-low loss and large effective area.

The invention relates to the technical field of high polymer materials, in particular to a composite composition for rotational plastic, polyvinyl rotational plastic and application. The composite composition for the rotational molding material comprises a component A and a component B, wherein the component A comprises polyethylene resin, modified polyethylene resin, polyethylene wax and alkylphenol polyoxyethylene ether; the component B comprises a modified fiber material, an antioxidant, a flame retardant, an inorganic filler and a light stabilizer; wherein the modified polyethylene resin is polyethylene resin modified by a polysiloxane compound; the modified fiber material is a fiber material modified by organic acid or inorganic acid. The rotational plastic prepared from the composite composition for the rotational plastic provided by the invention has the mechanical properties of environmental stress cracking resistance and high impact resistance.

The application discloses a shape memory composite component without external heating components, which comprises a plurality of resin-based carbon fiber layers, the projection shape of the composite material in the thickness direction is rectangular, two electrode sheets are arranged in the resin-based carbon fiber layers, and the two electrode sheets are arranged between two resin-based carbon fiber layers, the layer angles of the two resin-based carbon fiber layers on the two sides of the electrode sheets are both 0° direction, and the two electrode sheets are away from and respectively arranged at the two ends of the 0° direction; the electrode sheets are provided with openings, and the electrode sheets are connected with wires. The shape memory composite material structure is provided with electrodes, the carbon fiber electric heating performance is used to complete temperature rise to realize shape recovery of the shape memory composite material. The problems of invasion of the heating components into the deformation space of the shape memory structure, reduction of the deformation capacity of the structure, increase of the folding stress of the shape memory composite material and material damage caused by the folding stress are effectively solved.

The utility model discloses a polarizing plate processing equipment including compound device and warping adjusting device, compound device includes upper pressure roller and lower pressure roller, and the upper pressure roller is installed at the top of lower pressure roller, and the line of the center of upper pressure roller and the center of lower pressure roller is in vertical direction, warping adjusting device includes the always keeping level and can be along the vertical direction up and down movement and can stay on the preset height automatic realization position locking adjusting roller, and the polarizing plate of compound through upper pressure roller and lower pressure roller, around to the lower of adjusting roller and closely adjusting roller, and the polarizing plate after leaving adjusting roller is hauled to the above of adjusting roller, and adjusting roller exerts pressure to the polarizing plate, and the up and down movement adjusting roller improves the warping of polarizing plate, the utility model discloses a polarizing plate processing equipment can effectively solve the warping exception of polarizing plate.

The application discloses a processing method of a high-entropy alloy, which comprises first laser action, second laser action, electric field action and He + ion irradiation, coupling of the three means, and can realize improvement of the corrosion resistance of the high-entropy alloy, and through accurate matching and regulation of multiple process parameters, a synergistic effect is realized. Specifically, a certain amount of He + ion irradiation can improve the residual stress distribution and mechanical properties of the surface layer of the high-entropy alloy, the electric field action can improve the diffusion of the composition of the high-entropy alloy, and the laser action can optimize the microstructure, so that the pitting corrosion resistance, the crevice corrosion resistance and the stress corrosion resistance of the high-entropy alloy can be significantly improved as a whole, the comprehensive corrosion resistance of the high-entropy alloy is significantly enhanced, and the market application value of the high-entropy alloy is increased, so as to meet the demand of nuclear power plants for corrosion-resistant materials.

This invention discloses a pipe node connection assembly and an aquaculture cage, relating to the field of deep-sea aquaculture equipment technology. The pipe node connection assembly is applied to an aquaculture cage, which includes a central column and multiple edge columns. The pipe node connection assembly includes struts, spokes, and an elbow plate structure. Adjacent edge columns are connected by struts, with each edge column connected to two struts. The central column is connected to multiple edge columns via multiple spokes, with the spokes positioned between two struts on the same edge column. The elbow plate structure is fan-shaped and connected to the outer periphery of the edge columns. The elbow plate structure is positioned between the struts and spokes, with the radial sections on both sides of the elbow plate structure connected to the struts and spokes, respectively. This invention, through the coordinated arrangement and connection of the struts, spokes, and elbow plate structure, effectively enhances the connection strength and stress concentration resistance of key pipe nodes in the aquaculture cage, while reducing structural complexity and saving economic costs.

The utility model provides a door sealing opening anti-cracking structure, and relates to the technical field of buildings. The door sealing opening anti-cracking structure comprises a new wall body and an old wall body, a plurality of embedded steel bars are arranged between the new wall body and the old wall body, one ends of the embedded steel bars are embedded into the new wall body, and the other ends of the embedded steel bars are embedded into the old wall body; reinforcing plates are symmetrically arranged on the two sides of the new wall body, the reinforcing plates are connected through a first connecting piece and a second connecting piece, and an inner reinforcing layer and an outer reinforcing layer are arranged on the inner side and the outer side of each reinforcing plate respectively. The anti-cracking structure can improve the connecting strength of the new wall and the old wall, prevent the wall from cracking and improve the attractiveness of the wall.

The invention relates to a structural battery based on integration of a honeycomb composite material and an electrochemical energy storage unit. According to the structural battery, a force bearing function and an electric energy storage function are combined. According to the battery, a bionic honeycomb composite material is adopted as a matrix, and a lithium ion electrochemical unit is embedded into the matrix, so that the multifunctional structure battery with high mechanical strength and excellent electrochemical performance is formed. The honeycomb composite material is used as a carrier and an ion transmission channel of an electrode active material, and is also used as a bearing structure of a mechanical load. According to the design, the energy density, the safety and the cycle life of the battery are remarkably improved, and the battery is particularly suitable for the fields of electric automobiles, aerospace and the like with relatively high requirements on light weight and space utilization rate.

The invention relates to the technical field of spacecraft skins, in particular to a lightweight thermoplastic composite material film for a spacecraft skin. The thermoplastic composite material film is prepared by the following steps: dipping carbon fibers and a hollow ceramic tube in a mixed solution consisting of polyetherimide and graphene oxide dissolved in N-methyl pyrrolidone, and then carrying out heat treatment to obtain modified carbon fibers and modified hollow ceramic tubes; adding polyarylene ether nitrile into a double-screw extruder, melting, adding the modified hollow ceramic tube, and continuously mixing for 10-15 minutes to obtain a resin matrix; the preparation method comprises the following steps: mixing modified carbon fibers with a resin matrix, casting the mixed material to form a film, cooling to room temperature, rolling to obtain unidirectional prepregs, crosswise and symmetrically laying the unidirectional prepregs, and carrying out hot press molding to obtain the lightweight thermoplastic composite film for the spacecraft skin. The film prepared by the invention has the effects of low density, high strength and extreme climate resistance.