Nanoparticle-containing composite film, preparation device and method and film preparation method

Abstract

The invention relates to a nano-particle-containing composite film, a preparation device and method and a film preparation method, and the nano-particle-containing composite film comprises a plurality of film layers (a) and fiber bundle layers (b) arranged between the adjacent film layers (a); the film layer is an epoxy resin film containing nano particles, or nano particles are added to fiber bundles in the fiber bundle layer (b); and the nano particles are magnetized nano particles. According to the preparation method disclosed by the invention, the nanoparticles can be regularly arranged by magnetizing the nanoparticles, so that the mechanical property of the nanoparticle-containing composite film can be effectively enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of composite materials, and in particular to a composite film containing nanoparticles, a preparation device and method, and a film preparation method. Background Art

[0002] Fiber-reinforced composite materials have the advantages of high specific strength and specific stiffness and are widely used in aerospace, automobile manufacturing, construction and other fields. However, in the preparation process of composite materials, since the common fiber diameters are mostly a few microns to tens of microns, it is difficult to control their spatial position. The random distribution of fibers causes the material properties of the prepared composite materials to be highly dispersed, reducing their macroscopic mechanical properties.

[0003] Chinese patent application CN111070720B discloses a fiber position control device and method for fiber reinforced composite materials, in which the tip of the elbow tweezers is wrapped with tape to clamp a single fiber filament, and is controlled by a three-axis micro-motion platform, which can semi-automatically realize the alignment of the fiber filament and the penetration of the micropores in the microporous mold to achieve regular fiber distribution; Chinese patent application CN114474784A discloses a method and device for preparing a micron-level regularly arranged fiber bundle, in which a single fiber filament bonded with a mass block is placed on a single fiber fixture, and the single-layer fiber fixture is moved to a suitable position by operating a horizontal moving platform, and then the single fiber fixture is driven downward by operating a vertical moving platform to fix the fiber filament on the single fiber fixture on the single-layer fiber fixture. Although these existing schemes can realize the control of the spatial position of the fiber, they are not suitable for the mass production of composite materials with uniform fiber distribution, and the prepared composite materials do not contain nanomaterials, have poor mechanical properties, and are difficult to meet the corresponding use requirements. Summary of the invention

[0004] The object of the present invention is to provide a composite film containing nanoparticles, a preparation device, a method and a film preparation method.

[0005] To achieve the above-mentioned object of the invention, the present invention provides a nanoparticle-containing composite membrane, comprising: a plurality of film layers and a fiber bundle layer arranged between adjacent film layers; The film layer is an epoxy resin film containing nanoparticles, or the fiber bundles in the fiber bundle layer are attached with nanoparticles; The nanoparticles are magnetizable nanoparticles.

[0006] According to one aspect of the present invention, if the film layer is an epoxy resin film containing nanoparticles, it is obtained by the following steps, including: In a direction away from the carrier, a vacuum silica gel layer, a water-soluble polymer film layer, and a silane coupling agent layer are sequentially arranged; Arranging an epoxy resin colloid containing nanoparticles on the silane coupling agent layer, wherein the nanoparticles are magnetized; Applying a magnetic field to align the orientation of the magnetized nanoparticles; The epoxy resin colloid is solidified, and the water-soluble polymer film layer is dissolved to obtain the film layer.

[0007] According to one aspect of the present invention, in the step of providing the epoxy resin colloid containing nanoparticles on the silane coupling agent layer, the epoxy resin colloid containing nanoparticles is obtained by the following steps, which include: Taking a preset equivalent amount of epoxy resin solution and a curing agent, adding a silane coupling agent, and stirring at room temperature for a preset time to obtain a first mixture; adding nanoparticles to the first mixture and dispersing the nanoparticles in an ultrasonic field to obtain a second mixture; The nanoparticles in the second mixture are magnetized by surface modification of magnetic nanoparticles or carbonization of magnetic precursors, and the bubbles in the second mixture are completely extracted by a vacuum pump under magnetic stirring to obtain epoxy resin colloid containing nanoparticles.

[0008] According to one aspect of the present invention, if the fiber bundles in the fiber bundle layer are attached with magnetized nanoparticles, the film layer is an epoxy resin film; The fiber bundle with attached magnetized nanoparticles is obtained by the following steps, which include: Static electricity is applied to the fiber bundle, and magnetized nanoparticles adhere to the statically applied fiber bundle.

[0009] To achieve the above-mentioned purpose of the invention, the present invention provides a device for preparing the aforementioned nanoparticle-containing composite film, comprising: a winding module, a motor connected to the winding module, a feeding module for supporting the motor, and a guiding module for conveying a fiber bundle; The winding module comprises: a winding roller and an attachment plate; The winding roller comprises: a fixed roller and a sticking roller sleeved outside the fixed roller; A temperature control module and a temperature sensor module are arranged on the outer side of the fixed roller; Along the axial direction of the fixed roller, a plurality of temperature control modules are arranged at equal intervals; The temperature sensor module is arranged between adjacent temperature control modules; Along the radial direction of the winding roller, the temperature control module and the temperature sensor module are spaced from the pasting roller; The feeding module is linearly driven, and its driving direction is arranged to be consistent with the axial direction of the winding roller.

[0010] According to one aspect of the present invention, the guide module comprises: a tensioning assembly and a transparent ruler; The tensioning assembly and the winding roller are spaced apart, and the transparent scale is arranged between the tensioning assembly and the winding roller; The tensioning assembly comprises: a first tensioning roller and a second tensioning roller; The first tensioning roller and the second tensioning roller are arranged with a gap; The transparent scale comprises: a transparent substrate, a tension reference mark, a tension scale mark and a position scale mark arranged on the transparent substrate; The tension reference mark is symmetrically arranged on two opposite sides of the tension scale mark; There are a plurality of position scale marks arranged at equal intervals, The tension reference mark and the tension scale mark are arranged along the conveying direction of the fiber bundle; The plurality of position scale marks are arranged along a direction perpendicular to the conveying direction of the fiber bundle.

[0011] To achieve the above-mentioned object of the invention, the present invention provides a method for preparing a composite film containing nanoparticles using the above-mentioned preparation device, wherein the composite film containing nanoparticles comprises: a plurality of film layers and a fiber bundle layer arranged between adjacent film layers; The film layer is an epoxy resin film containing nanoparticles, or the fiber bundles in the fiber bundle layer are attached with nanoparticles; The nanoparticles are magnetized nanoparticles; The preparation method comprises the following steps: S1. Attach a film layer to the pasting roller of the winding roller; S2. The fiber bundle passes through the tensioning assembly of the guide module and adheres to the film layer of the pasting roller; S3. Calibrate the tension and position of the fiber bundle based on the tensioning assembly and the transparent ruler; S4. The feeding module drives the winding roller to move along its axial direction at a preset speed, and at the same time, the motor drives the winding roller to rotate at a preset speed; S5. After the fiber bundle is wound on the film layer, the feeding module and the motor are stopped, and the fiber bundle is cut along the butting position of the film layer on the pasting roller to form a fiber bundle layer on the film layer; S6. Take another film layer and attach it to the previous film layer to wrap the fiber bundle layer between the two film layers; S7. Repeat steps S2 to S6 until the thickness of the fiber bundle layer reaches the preset requirement; S8. Based on the temperature control module in the winding roller, the roller temperature of the pasting roller is controlled to debond the prepared nanoparticle-containing composite film from the surface.

[0012] According to one aspect of the present invention, in step S1, the step of attaching a film layer to a sticking roller of a winding roller includes: S11. The end of the film layer is pasted to the surface of the pasting roller; S12. Adjust the position of the attachment plate relative to the attachment roller so that the attachment plate is pressed against the film layer; S13. Rotate the pasting roller, and make the film layer adhere to the surface of the pasting roller based on the pressing effect of the pasting plate.

[0013] To achieve the above-mentioned object of the invention, the present invention provides a method for preparing a film containing nanoparticle epoxy resin film, comprising: In a direction away from the carrier, a vacuum silica gel layer, a water-soluble polymer film layer, and a silane coupling agent layer are sequentially arranged; Arranging an epoxy resin colloid containing nanoparticles on the silane coupling agent layer, wherein the nanoparticles are magnetized; Applying a magnetic field to align the orientation of the magnetized nanoparticles; The nanoparticle-containing epoxy resin colloid is solidified, and the water-soluble polymer film layer is dissolved to obtain the nanoparticle-containing epoxy resin film.

[0014] According to one aspect of the present invention, the nanoparticle-containing epoxy resin colloid is obtained by the following steps, which include: Take a preset equivalent amount of epoxy resin solution and curing agent, add a silane coupling agent, and stir at room temperature for a preset time to obtain a first mixture; wherein the preset time is 15 to 20 minutes; adding nanoparticles to the first mixture and dispersing the nanoparticles in an ultrasonic field to obtain a second mixture; The nanoparticles in the second mixture are magnetized by surface modification of magnetic nanoparticles or carbonization of magnetic precursors, and the bubbles in the second mixture are completely extracted by a vacuum pump under magnetic stirring to obtain the epoxy resin colloid containing nanoparticles.

[0015] According to one solution of the present invention, the present invention can magnetize the nanoparticles so that the nanoparticles are arranged regularly, thereby effectively enhancing the mechanical properties and electrical conductivity of the composite film containing the nanoparticles.

[0016] According to one scheme of the present invention, the present invention can achieve the introduction of nanoparticles in the nanoparticle-containing composite membrane by attaching nanoparticles to the fiber bundles of the fiber bundle layer, and then a thin film layer made of ordinary materials can be used, which effectively reduces the production difficulty and cost of the thin film layer, making the preparation of the present invention more flexible.

[0017] According to one solution of the present invention, the present invention can accurately control the position of the fiber bundles to obtain a fiber bundle layer with precise spacing between the fiber bundles.

[0018] According to one solution of the present invention, the present invention can accurately control the winding speed of the limiting bundle and the travel speed of the feeding module, thereby realizing flexible control of the laying efficiency of the fiber bundle layer and improving the laying speed of the fiber bundle layer.

[0019] According to one scheme of the present invention, the present invention can realize accurate control of the fiber bundle conveying speed, and can also flexibly arrange the number of wire bundles (such as using a single bundle or multiple bundles), thereby realizing the preparation of different types of fiber bundle layers; in addition, the position of the fiber bundle can be accurately calibrated through the set transparent ruler, so as to effectively improve the laying accuracy of the fiber bundle layer.

[0020] According to one solution of the present invention, the present invention can basically measure the tension of the fiber bundle during laying by setting a transparent ruler, and can basically ensure that the path of the fiber monofilament is stable during the laying process.

[0021] According to one scheme of the present invention, the temperature of the winding module can be flexibly controlled during the preparation of a nanoparticle-containing composite film, and the temperature of the composite material during the operation process can be accurately controlled in real time, which helps to ensure the quality of the nanoparticle-containing composite film and is beneficial to the laying of the nanoparticle-containing composite film and fiber adhesion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a diagram schematically showing the structure of a composite film containing nanoparticles according to one embodiment of the present invention; Figure 2 is a diagram schematically showing a regular distribution of magnetized nanoparticles in a nanoparticle-containing epoxy resin film according to an embodiment of the present invention; Figure 3 is a diagram schematically showing the distribution of non-magnetized nanoparticles in a nanoparticle-containing epoxy resin film according to one embodiment of the present invention; Figure 4 is a schematic structural diagram of a device for preparing a composite film containing nanoparticles according to an embodiment of the present invention; Figure 5 is a structural diagram schematically showing a winding module according to an embodiment of the present invention; Figure 6 is a structural diagram schematically showing a guide module according to an embodiment of the present invention; Figure 7 is a schematic diagram of a method for preparing a composite film containing nanoparticles according to one embodiment of the present invention; Figure 8 is a microscopic view schematically showing a fiber bundle layup of multiple fiber bundle layers in a nanoparticle-containing composite membrane according to one embodiment of the present invention; Fig. 9 FIG. 1 is a microscopic view schematically showing a fiber bundle layup of a multi-layer fiber bundle layer of a conventional composite membrane according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the embodiments of the present invention are not therefore limited to the following embodiments.

[0026] like Figure 1 As shown, according to one embodiment of the present invention, the present invention provides a composite film containing nanoparticles, comprising: a plurality of film layers a and a fiber bundle layer b arranged between adjacent film layers a; in this embodiment, the film layer is an epoxy resin film containing nanoparticles, or the fiber bundle in the fiber bundle layer b is attached with nanoparticles; wherein the nanoparticles are magnetizable nanoparticles, and further, the nanoparticles can also be provided with functions such as conductivity, such as carbon nanotubes.

[0027] In this embodiment, if the film layer is an epoxy resin film containing nanoparticles, the nanoparticles are embedded in the epoxy resin in a regularly arranged manner and then cured.

[0028] In this embodiment, if nanoparticles are added to the fiber bundles in the fiber bundle layer b, the nanoparticles are regularly adhered to the fiber bundles, wherein electrostatic force is applied to the fiber bundles to make the nanoparticles adhere to the fiber bundles.

[0029] like Figure 1 As shown, according to one embodiment of the present invention, if the film layer is an epoxy resin film containing magnetized nanoparticles, it is obtained by the following steps, including: In the direction away from the carrier, a vacuum silicone layer, a water-soluble polymer film layer, and a silane coupling agent layer are arranged in sequence; in this embodiment, a regular glass slide can be used as a carrier for preparing the epoxy resin film, wherein the outer dimensions of the glass slide are arranged in accordance with the outer dimensions of the epoxy resin film to be prepared. In this embodiment, the vacuum silicone layer is coated with vacuum silicone so that it is covered on the surface of the glass slide, and then a water-soluble polymer film layer is covered on the vacuum silicone layer by an attachment method, wherein the water-soluble polymer film layer can be obtained by a pre-prepared method, and further, a silane coupling agent layer is coated on the formed water-soluble polymer film layer, thereby completing the overall structural arrangement of the carrier.

[0030] An epoxy resin colloid containing nanoparticles is arranged on the silane coupling agent layer, wherein the nanoparticles are subjected to magnetization treatment.

[0031] Apply a magnetic field to align the orientation of the magnetized nanoparticles; see Figure 2 and Figure 3 As shown, in this embodiment, the carrier is fixed as a whole on a thin film spin coater, and a magnetic sheet is installed on the other side of the carrier fixed on the thin film spin coater so that the direction of the magnetized nanomaterials is consistent; wherein the obtained epoxy resin colloid is smeared on the silane coupling agent layer so that the epoxy resin colloid can adhere to the water-soluble polymer film layer, and then, by adjusting the rotation speed of the thin film spin coater, a preset thickness and uncured epoxy resin film containing nanoparticles can be obtained.

[0032] The nanoparticle-containing epoxy resin colloid is solidified, and the water-soluble polymer film layer is dissolved to obtain a thin film layer; in this embodiment, the carrier on the thin film spin coater is removed, and then the whole is placed in an oven at a preset temperature for a certain period of time to solidify the formed nanoparticle-containing epoxy resin film, and then cooled to room temperature in the oven; further, the cooled carrier is placed in a glass container filled with room temperature water and left to stand for a preset time to dissolve the water-soluble polymer film layer, thereby separating the solidified nanoparticle-containing epoxy resin film from the carrier, and then the separated nanoparticle-containing epoxy resin film is taken out and cannot be dried to obtain a finished nanoparticle-containing epoxy resin film.

[0033] According to one embodiment of the present invention, in the step of providing the epoxy resin colloid containing nanoparticles on the silane coupling agent layer, the epoxy resin colloid containing nanoparticles is obtained by the following steps, which include: Take a preset equivalent amount of epoxy resin solution and curing agent, add a silane coupling agent, and stir at room temperature for a preset time to obtain a first mixture; in this embodiment, the preset time is 15 to 20 minutes.

[0034] Nanoparticles are added to the first mixture and dispersed in an ultrasonic field to obtain a second mixture.

[0035] The nanoparticles in the second mixture are magnetized by surface modification of magnetic nanoparticles or carbonization of magnetic precursors, and bubbles in the second mixture are completely extracted by a vacuum pump under magnetic stirring to obtain epoxy resin colloid containing nanoparticles.

[0036] According to an embodiment of the present invention, if the fiber bundles in the fiber bundle layer b are attached with magnetized nanoparticles, the film layer a is an epoxy resin film; wherein the epoxy resin film is made of a single material. In this embodiment, the fiber bundles attached with magnetized nanoparticles are obtained by the following steps, which include: Static electricity is added to the fiber bundle, and magnetized nanoparticles are attached to the fiber bundle based on the static electricity. In this embodiment, the fiber bundle is electrostatically treated by setting an electrostatic generating device, and then the fiber bundle passes through the nanoparticle holding device, so that the surface of the fiber bundle after passing through the nanoparticle holding device is attached with nanoparticles with a consistent arrangement direction. In this embodiment, the magnetized nanoparticles are magnetized after being attached to the fiber bundle and before the fiber bundle is adhered to the film layer a.

[0037] Combination Figure 4 , Figure 5 and Figure 6 As shown, according to one embodiment of the present invention, the present invention provides a preparation device for the aforementioned nanoparticle-containing composite film, comprising: a winding module 1, a motor 2 connected to the winding module 1, a feeding module 3 for supporting the motor 2, and a guiding module 4 for conveying a fiber bundle; in this embodiment, the winding module 1 comprises: a winding roller 11 and an attachment plate 12; wherein the winding roller 11 comprises: a fixed roller 111 and a pasting roller 112 sleeved on the outside of the fixed roller 111; in this embodiment, the pasting roller 112 is a hollow cylinder with openings at both ends, which is sleeved on the outside of the fixed roller 111, and is fixed to the two ends of the fixed roller 111 through opposite ends to achieve a coaxial connection between the pasting roller 112 and the fixed roller 111.

[0038] In this embodiment, the attachment plate 12 is spaced from the outer surface of the pasting roller 112. Specifically, along the radial direction of the pasting roller 112, the position of the attachment plate 12 relative to the pasting roller 112 can be adjusted, so that the side of the film layer a can be adhered to the pasting roller 112 on the pasting roller 112, and the position of the attachment plate 12 relative to the pasting roller 112 can be adjusted, and then the film layer a can be precisely adhered to the outer surface of the pasting roller 112 by the attachment plate 12 by rotating the pasting roller 112. In this embodiment, the attachment plate 12 can be set as a flat plate or a curved plate, so that the film layer a is fully adhered by line contact or surface contact. In this embodiment, the size of the film layer a can match the size of the outer surface of the pasting roller 112, so that the film layer a covers the pasting roller 112 while the opposite ends of the film layer a are butted, thereby ensuring that the length of the adhered fiber bundle can completely match the length of the film layer a, avoiding the waste of fiber bundle material.

[0039] In this embodiment, a temperature control module 111a and a temperature sensor module 111b are arranged on the outer side of the fixed roller 111; wherein, along the axial direction of the fixed roller 111, a plurality of temperature control modules 111a are arranged at equal intervals; the temperature sensor module 111b is arranged between adjacent temperature control modules 111a; in this embodiment, the temperature control module 111a is provided with a plurality of temperature control sub-modules 111a1, wherein, along the circumference of the fixed roller 111, a plurality of temperature control sub-modules 111a1 in each temperature control module 111a are arranged adjacent to each other in sequence to achieve the circumferential encirclement of the fixed roller 111.

[0040] In this embodiment, the temperature sensor module 111b is provided with a plurality of temperature sensors 111b1, wherein along the circumference of the fixed roller 111, the plurality of temperature sensors 111b1 in each temperature sensor module 111b are arranged adjacent to each other in sequence to achieve the circumference surrounding of the fixed roller 111.

[0041] In this embodiment, the number of temperature control submodules 111a1 in each temperature control module 111a is consistent with the number of temperature sensors 111b1 in each temperature sensor module 111b. Thus, the temperature control submodules 111a1 and temperature sensors 111b1 of the adjacent temperature control modules 111a and temperature sensor modules 111b can be arranged adjacent to each other in a one-to-one manner to achieve accurate control and monitoring of the temperature.

[0042] In this embodiment, along the radial direction of the winding roller 11, there is a spacing between the temperature control module 111a, the temperature sensor module 111b and the pasting roller 112; wherein, by setting the pasting roller 112 and the fixed roller 111 with a spacing, there is also a spacing between the temperature control module 111a and the temperature sensor module 111b and the pasting roller 112. Through the above arrangement, the temperature control module 111a can be prevented from contacting the pasting roller 112, and then the temperature distribution of the hollow position can be made more uniform by heat transfer in the hollow position, which effectively ensures the uniform heating of the pasting roller 112, so that the film layer can be accurately controlled in the adhesion and debonding state. In addition, through the above arrangement, the problem of uneven heating area caused by failure of some temperature control submodules 111a1 or temperature sensors 111b1 can be effectively avoided, and the influence on the film layer can be effectively avoided (preventing film denaturation (temperature is too high) and difficulty in sticking the film (temperature is too low)).

[0043] In this embodiment, the feeding module 3 is linearly driven, and its driving direction is consistent with the axial direction of the winding roller 11; in this embodiment, the feeding module 3 can be implemented by an electric cylinder. Of course, the feeding module 3 can also be constructed by a combination of guide rails and lead screws, as long as the winding module 1 and the motor 2 can be stably supported.

[0044] Combination Figure 4 , Figure 5 and Figure 6 As shown, according to one embodiment of the present invention, the guide module 4 includes: a tensioning assembly 41 and a transparent scale 42; in this embodiment, the tensioning assembly 41 and the winding roller 11 are spaced apart, and the transparent scale 42 is arranged between the tensioning assembly 41 and the winding roller 11; wherein, the first tensioning roller 411 and the second tensioning roller 412 are spaced apart; in this embodiment, the first tensioning roller 411 and the second tensioning roller 412 can be arranged in an upper and lower spacing manner, for example, the first tensioning roller 411 is directly above or obliquely above the second tensioning roller 412.

[0045] In this embodiment, the axial direction of the first tensioning roller 411 is arranged to be consistent with the axial direction of the winding roller 11, so that the fiber bundle can be transported to the winding roller 11 after passing through the second tensioning roller 412 and the first tensioning roller 411. In this embodiment, the transparent scale 42 is located between the first tensioning roller 411 and the winding roller 11, and its position is lower than the position of the fiber bundle connected between the first tensioning roller 411 and the winding roller 11, so that the relative position relationship between the fiber bundle and the corresponding scale on the transparent scale 42 can be obtained by projection. Of course, in different embodiments, the position of the transparent scale 42 can be moved up and down, or it can be fixed, as long as it does not affect the transportation of the fiber bundle. In this embodiment, in order to ensure that the projection position of the fiber bundle corresponds accurately to the corresponding scale on the transparent scale 42, the transported fiber bundle is kept parallel to the transparent scale 42.

[0046] In this embodiment, the transparent scale 42 includes: a transparent substrate 421, a tension reference mark 422, a tension scale mark 423 and a position scale mark 424 arranged on the transparent substrate 421; wherein the tension reference mark 422 is symmetrically arranged on opposite sides of the tension scale mark 423. In this embodiment, the tension reference mark 422 and the tension scale mark 423 are arranged along the conveying direction of the fiber bundle. In this embodiment, the tension reference mark 422 can be set as a straight groove or a straight protrusion, and it is set in the middle position of the transparent substrate 421; and the tension scale mark 423 is evenly spaced on each side of the tension reference mark 422, wherein the tension scale mark 423 can also be set as a straight groove or a straight protrusion, and each tension scale mark 423 is arranged parallel to the tension reference mark 422. In this embodiment, the tension scale mark 423 is micrometer level.

[0047] In this embodiment, a plurality of position scale marks 424 are arranged at equal intervals, and the plurality of position scale marks 424 are arranged along the conveying direction perpendicular to the fiber bundle; wherein the position scale marks 424 can also be set as straight grooves or straight protrusions; in this embodiment, the position scale marks 424 are at the micron level.

[0048] Combination Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, according to one embodiment of the present invention, the present invention provides a method for preparing a composite film containing nanoparticles using the aforementioned preparation device, wherein the composite film containing nanoparticles comprises: a plurality of film layers a and a fiber bundle layer b arranged between adjacent film layers a. In this embodiment, the film layer is an epoxy resin film containing nanoparticles, or the fiber bundles in the fiber bundle layer b are attached with nanoparticles; wherein the nanoparticles are magnetized nanoparticles. In this embodiment, the preparation method comprises the following steps: S1. Attach a film layer a to the pasting roller 112 of the winding roller 11; in the present embodiment, the film layer a can be made of an epoxy resin film containing nanoparticles or an epoxy resin film without nanoparticles, which can be adhered to the pasting roller 112 based on the viscosity of the film layer a itself; of course, while adhering the film layer a to the pasting roller 112, the surface temperature of the pasting roller 112 can be matched with the adhesion characteristics of the film layer a by controlling the temperature control module 111a, thereby ensuring that the adhesion of the film layer a is stable and reliable.

[0049] S2. Pass the fiber bundle through the tensioning assembly 41 of the guide module 4 and adhere it to the film layer a of the pasting roller 112; in this embodiment, the fiber bundle passes through the second tensioning roller 412 and the first tensioning roller 411 in sequence, so that its end can be further adhered to the film layer a, wherein, along the axial direction of the pasting roller 112, the fiber bundle is adjacent to or flush with one side of the film layer a; further, define the tangent point between the fiber bundle and the first tensioning roller 411 as A, define the tangent point between the fiber bundle and the pasting roller 112 as B, and define the midpoint between point A and point B as C, thereby adjusting the position of the transparent ruler 42 so that the tension reference mark 422 on the transparent ruler 42 coincides with point C, and mark the point C of the fiber bundle. At the same time, it is necessary to adjust the angle of the transparent ruler 42 so that the transparent ruler 42 is parallel to the fiber bundle and the fiber bundle is aligned with a position scale mark 424 on the transparent ruler 42.

[0050] S3. The tension and position of the fiber bundle are calibrated based on the tensioning assembly 41 and the transparent scale 42; in this embodiment, the initial position of the fiber bundle is calibrated based on the position scale mark 424 corresponding to the fiber bundle and the transparent scale 42; further, the first tensioning roller 411 and the second tensioning roller 412 are moved to observe the position of the marked point (i.e., point C) on the fiber bundle relative to the tension scale mark 423 to calibrate the limiter bundle tension, so as to determine whether the tension of the fiber bundle meets the requirements. In this embodiment, the alignment accuracy of the fiber bundle and the tension scale mark 423 is observed by using a microscope.

[0051] S4. The feeding module 3 drives the winding roller 11 to move along its axial direction at a preset speed, and at the same time, the motor 2 drives the winding roller 11 to rotate at a preset speed; in this embodiment, during the axial movement of the winding roller 11, the fiber bundle is wound in a manner that the fiber bundle is aligned with the position scale mark 424 on the transparent ruler 42, so as to keep the spacing of the fiber bundles on the pasting roller 112 constant. In this embodiment, the alignment accuracy of the fiber bundle with the position scale mark 424 during the winding process is observed by using a microscope.

[0052] S5. After the fiber bundle is wound on the film layer a, the feeding module 3 and the motor 2 are stopped, and the fiber bundle is cut along the docking position of the film layer a on the pasting roller 112 to form a fiber bundle layer b on the film layer a; in this embodiment, after the fiber bundle is wound from one end of the winding roller 11 to the other end of the winding roller 11, the fiber bundle is evenly distributed on the film layer a, and then the feeding module 3 and the motor 2 stop moving at the same time to complete the winding of the fiber bundle. In this embodiment, the fiber bundle is cut along the docking position of the film layer a on the pasting roller 112, thereby dividing the entire fiber bundle into fiber bundle segments arranged at equal intervals on the pasting roller 112.

[0053] S6. Take another film layer a and attach it to the previous film layer a to wrap the fiber bundle layer b between the two film layers a; S7. Repeat steps S2 to S6 until the thickness of the fiber bundle layer b reaches the preset requirement, see Figure 8 and Fig. 9 ; S8. Based on the temperature control module 111a in the winding roller 11, the roller temperature of the sticking roller 112 is controlled to debond the prepared nanoparticle-containing composite film from the surface.

[0054] Combination Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, according to an embodiment of the present invention, in step S1, the step of attaching a film layer a to the pasting roller 112 of the winding roller 11 includes: S11. The end of the film layer a is pasted to the surface of the pasting roller 112; S12. Adjust the position of the attachment plate 12 relative to the attachment roller 112 so that the attachment plate 12 is pressed against the film layer a; S13 . The pasting roller 112 is rotated, and the film layer a is adhered to the surface of the pasting roller 112 due to the pressing effect of the pasting plate 12 .

[0055] According to an embodiment of the present invention, in step S2, in the step of passing the fiber bundle through the tensioning assembly 41 of the guide module 4 and adhering to the film layer a of the pasting roller 112, if the fiber bundle in the fiber bundle layer b is attached with nanoparticles, the fiber bundle can be pre-attached with nanoparticles or the nanoparticles can be attached before the fiber bundle passes through the tensioning assembly 41 and is wound around the pasting roller 112. In this embodiment, the effect of the fiber bundle adhering to the magnetized nanoparticles is achieved based on the method of adding static electricity to the fiber bundle; in this embodiment, the fiber bundle is electrostatically treated by setting an electrostatic generating device, wherein a friction plate (to generate static electricity by friction, collision, etc. of the glass fiber) can be used, and static electricity can also be generated by methods such as electrostatic induction.

[0056] Furthermore, the fiber bundle is passed through a nanoparticle holding device so that the surface of the fiber bundle after passing through the nanoparticle holding device is covered with nanoparticles arranged in a consistent direction; of course, in another embodiment, the surface of the fiber bundle can also be covered with nanoparticles arranged in a consistent direction by spraying nanoparticles on the electrostatically charged fiber bundle.

[0057] like Figure 1 As shown, according to one embodiment of the present invention, the present invention provides a method for preparing a film containing nanoparticle epoxy resin film, comprising: In the direction away from the carrier, a vacuum silicone layer, a water-soluble polymer film layer, and a silane coupling agent layer are arranged in sequence; in this embodiment, a regular glass slide can be used as a carrier for preparing the epoxy resin film, wherein the outer dimensions of the glass slide are arranged in accordance with the outer dimensions of the epoxy resin film to be prepared. In this embodiment, the vacuum silicone layer is coated with vacuum silicone so that it is covered on the surface of the glass slide, and then a water-soluble polymer film layer is covered on the vacuum silicone layer by an attachment method, wherein the water-soluble polymer film layer can be obtained by a pre-prepared method, and further, a silane coupling agent layer is coated on the formed water-soluble polymer film layer, thereby completing the overall structural arrangement of the carrier.

[0058] An epoxy resin colloid containing nanoparticles is arranged on the silane coupling agent layer, wherein the nanoparticles are subjected to magnetization treatment.

[0059] Apply a magnetic field to align the orientation of the magnetized nanoparticles; see Figure 2 and Figure 3 As shown, in this embodiment, the carrier is fixed as a whole on a thin film spin coater, and a magnetic sheet is installed on the other side of the carrier fixed on the thin film spin coater so that the direction of the magnetized nanomaterials is consistent; wherein the obtained epoxy resin colloid is smeared on the silane coupling agent layer so that the epoxy resin colloid can adhere to the water-soluble polymer film layer, and then, by adjusting the rotation speed of the thin film spin coater, a preset thickness and uncured epoxy resin film containing nanoparticles can be obtained.

[0060] The nanoparticle-containing epoxy resin colloid is solidified, and the water-soluble polymer film layer is dissolved to obtain the nanoparticle-containing epoxy resin film. In this embodiment, the carrier on the thin film spin coater is removed, and then the whole is placed in an oven, and placed at a preset temperature for a certain time, so that the formed nanoparticle-containing epoxy resin film is solidified, and cooled to room temperature with the oven; further, the cooled carrier is placed in a glass container filled with room temperature water and left to stand for a preset time, so that the water-soluble polymer film layer is dissolved, and then the solidified nanoparticle-containing epoxy resin film can be separated from the carrier, and then the separated nanoparticle-containing epoxy resin film is taken out and cannot be dried to obtain the finished nanoparticle-containing epoxy resin film.

[0061] like Figure 1 As shown, according to one embodiment of the present invention, the epoxy resin colloid containing nanoparticles is obtained by the following steps, which include: Take a preset equivalent amount of epoxy resin solution and curing agent, add a silane coupling agent, and stir at room temperature for a preset time to obtain a first mixture; wherein the preset time is 15 to 20 minutes; adding nanoparticles to the first mixture and dispersing the nanoparticles in an ultrasonic field to obtain a second mixture; The nanoparticles in the second mixture are magnetized by surface modification of magnetic nanoparticles or carbonization of magnetic precursors, and bubbles in the second mixture are completely extracted by a vacuum pump under magnetic stirring to obtain epoxy resin colloid containing nanoparticles.

[0062] The above contents are merely examples of specific solutions of the present invention. For devices and structures not described in detail therein, it should be understood that they can be implemented by adopting general devices and general methods available in the art.

[0063] The above is only one solution of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A composite film containing nanoparticles, characterized in that: include: A plurality of film layers (a) and a fiber bundle layer (b) disposed between adjacent film layers (a); The film layer (a) is an epoxy resin film containing nanoparticles, or the fiber bundles in the fiber bundle layer (b) are supplemented with nanoparticles; The nanoparticles are magnetizable nanoparticles.

2. The nanoparticle-containing composite film according to claim 1, characterized in that: If the film layer (a) is an epoxy resin film containing nanoparticles, it is obtained by the following steps, including: In a direction away from the carrier, a vacuum silica gel layer, a water-soluble polymer film layer, and a silane coupling agent layer are sequentially arranged; Arranging an epoxy resin colloid containing nanoparticles on the silane coupling agent layer, wherein the nanoparticles are magnetized; Applying a magnetic field to align the orientation of the magnetized nanoparticles; The nanoparticle-containing epoxy resin colloid is solidified, and the water-soluble polymer film layer is dissolved to obtain the film layer.

3. The nanoparticle-containing composite film according to claim 2, characterized in that: In the step of arranging the epoxy resin colloid containing nanoparticles on the silane coupling agent layer, the epoxy resin colloid containing nanoparticles is obtained by the following steps, which include: Taking a preset equivalent amount of epoxy resin solution and a curing agent, adding a silane coupling agent, and stirring at room temperature for a preset time to obtain a first mixture; adding nanoparticles to the first mixture and dispersing the nanoparticles in an ultrasonic field to obtain a second mixture; The nanoparticles in the second mixture are magnetized by surface modification of magnetic nanoparticles or carbonization of magnetic precursors, and the bubbles in the second mixture are completely extracted by a vacuum pump under magnetic stirring to obtain epoxy resin colloid containing nanoparticles.

4. The nanoparticle-containing composite film according to claim 1, characterized in that: If the fiber bundles in the fiber bundle layer (b) are attached with magnetized nanoparticles, the film layer (a) is an epoxy resin film; The fiber bundle with attached magnetized nanoparticles is obtained by the following steps, which include: Static electricity is applied to the fiber bundle, and magnetized nanoparticles adhere to the statically applied fiber bundle.

5. A device for preparing a composite film containing nanoparticles according to any one of claims 1 to 4, characterized in that: include: A winding module (1), a motor (2) connected to the winding module (1), a feeding module (3) for supporting the motor (2), and a guiding module (4) for conveying a fiber bundle; The winding module (1) comprises: a winding roller (11) and an attachment plate (12); The winding roller (11) comprises: a fixed roller (111) and a sticking roller (112) sleeved on the outside of the fixed roller (111); A temperature control module (111a) and a temperature sensor module (111b) are arranged on the outer side of the fixed roller (111); Along the axial direction of the fixed roller (111), a plurality of the temperature control modules (111a) are arranged at equal intervals; The temperature sensor module (111b) is arranged between adjacent temperature control modules (111a); Along the radial direction of the winding roller (11), the temperature control module (111a) and the temperature sensor module (111b) are spaced from the pasting roller (112); The feeding module (3) is linearly driven, and its driving direction is arranged to be consistent with the axial direction of the winding roller (11).

6. The preparation device according to claim 5, characterized in that: The guide module (4) comprises: a tensioning component (41) and a transparent ruler (42); The tensioning assembly (41) and the winding roller (11) are arranged at a distance from each other, and the transparent scale (42) is arranged between the tensioning assembly (41) and the winding roller (11); The tensioning assembly (41) comprises: a first tensioning roller (411) and a second tensioning roller (412); The first tensioning roller (411) and the second tensioning roller (412) are arranged with an interval; The transparent scale (42) comprises: a transparent substrate (421), a tension reference mark (422), a tension scale mark (423), and a position scale mark (424) arranged on the transparent substrate (421); The tension reference mark (422) is symmetrically arranged on two opposite sides of the tension scale mark (423); The position scale marks (424) are arranged in a plurality at equal intervals. The tension reference mark (422) and the tension scale mark (423) are arranged along the conveying direction of the fiber bundle; The plurality of position scale marks (424) are arranged along a direction perpendicular to the conveying direction of the fiber bundle.

7. A method for preparing a composite film containing nanoparticles using the preparation device according to any one of claims 5 to 6, characterized in that: The nanoparticle-containing composite film comprises: a plurality of film layers (a) and a fiber bundle layer (b) disposed between adjacent film layers (a); The film layer is an epoxy resin film containing nanoparticles, or the fiber bundles in the fiber bundle layer (b) are supplemented with nanoparticles; The nanoparticles are magnetized nanoparticles; The preparation method comprises the following steps: S1. attaching a film layer (a) to the sticking roller (112) of the winding roller (11); S2. The fiber bundle passes through the tensioning assembly (41) of the guide module (4) and adheres to the film layer (a) of the pasting roller (112); S3. Calibrate the tension and position of the fiber bundle based on the tensioning assembly (41) and the transparent ruler (42); S4. The feeding module (3) drives the winding roller (11) to move along its axial direction at a preset speed, and at the same time, the motor (2) drives the winding roller (11) to rotate at a preset speed; S5. After the fiber bundle is wound on the film layer (a), the feeding module (3) and the motor (2) are stopped, and the fiber bundle is cut along the film layer (a) at the docking position on the pasting roller (112) to form a fiber bundle layer (b) on the film layer (a); S6. Take another film layer (a) and attach it to the previous film layer (a) to wrap the fiber bundle layer (b) between the two film layers (a); S7. Repeat steps S2 to S6 until the thickness of the fiber bundle layer (b) reaches a preset requirement; S8. Based on the temperature control module (111a) in the winding roller (11), the roller temperature of the sticking roller (112) is controlled to debond the prepared nanoparticle-containing composite film from the surface.

8. The method according to claim 7, characterized in that In step S1, the step of attaching a film layer (a) to the sticking roller (112) of the winding roller (11) comprises: S11. pasting the end of the film layer (a) to the surface of the pasting roller (112); S12. adjusting the position of the attachment plate (12) relative to the attachment roller (112) so that the attachment plate (12) is pressed against the film layer (a); S13. Rotate the pasting roller (112), and based on the pressing effect of the attachment plate (12), make the film layer (a) adhere to the surface of the pasting roller (112).

9. A method for preparing a film containing nanoparticle epoxy resin film, characterized in that: include: In a direction away from the carrier, a vacuum silica gel layer, a water-soluble polymer film layer, and a silane coupling agent layer are sequentially arranged; Arranging an epoxy resin colloid containing nanoparticles on the silane coupling agent layer, wherein the nanoparticles are magnetized; Applying a magnetic field to align the orientation of the magnetized nanoparticles; The nanoparticle-containing epoxy resin colloid is solidified, and the water-soluble polymer film layer is dissolved to obtain the nanoparticle-containing epoxy resin film.

10. The thin film preparation method according to claim 9, characterized in that: The nanoparticle-containing epoxy resin colloid is obtained by the following steps, which include: Take a preset equivalent amount of epoxy resin solution and curing agent, add a silane coupling agent, and stir at room temperature for a preset time to obtain a first mixture; wherein the preset time is 15 to 20 minutes; adding nanoparticles to the first mixture and dispersing the nanoparticles in an ultrasonic field to obtain a second mixture; The nanoparticles in the second mixture are magnetized by surface modification of magnetic nanoparticles or carbonization of magnetic precursors, and the bubbles in the second mixture are completely extracted by a vacuum pump under magnetic stirring to obtain the epoxy resin colloid containing nanoparticles.

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