Colored fibers, colored fiber pieces, fiber reinforced composites, structural pieces, and methods of making

Abstract

The application discloses colored fibers, colored fiber products, fiber reinforced composite materials, structural parts and preparation methods, and belongs to the field of fiber materials. The colored fiber comprises transparent inorganic fibers and pigments, the transparent inorganic fibers are of a hollow structure, and the pigments are located inside cavities of the transparent inorganic fibers. The color of the colored fiber has permeability, and the pigments are protected by the transparent inorganic fibers and are not easy to be abraded or damaged. The preparation method of the colored fiber is simple and easy to operate, the cost is relatively low, the process of adding the pigments to the transparent inorganic fibers is not subject to excessive restrictions, and the customized demand of rapid iteration of colored fiber products is met.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of fiber materials, in particular to colored fiber, colored fiber piece, fiber reinforced composite material, structural piece and preparation method. BACKGROUND

[0002] Glass fiber is an inorganic fiber material, which has the advantages of high mechanical strength, strong heat resistance and good corrosion resistance. The glass fiber reinforced composite material based on glass fiber also has excellent strength and is widely used in various products that require lightweight and high strength. With the increasing demand for visual effects of product appearance, colored glass fiber has appeared. Colored glass fiber is obtained by coloring treatment of transparent glass fiber.

[0003] The colored glass fiber provided by the related art is obtained by mixing color powder with the raw material for preparing glass fiber, and then integrally forming the colored glass fiber by a melt-drawing method, or by coating a colored layer on the surface of the glass fiber to obtain the colored glass fiber.

[0004] However, the colored glass fiber prepared by mixing the color powder with the raw material for preparing glass fiber has a high production cost. The colored glass fiber prepared by coating a colored layer on the surface of the glass fiber has a high preparation difficulty, and the mechanical strength and heat resistance of the colored layer are usually lower than those of the glass fiber, so that the colored layer is easily abraded during the application of the colored glass fiber.

[0005] DISCLOSURE

[0006] In view of this, the present disclosure provides colored fiber, colored fiber piece, fiber reinforced composite material, structural piece and preparation method, which can solve the above technical problems.

[0007] In one aspect, a colored fiber is provided, comprising: a transparent inorganic fiber and a pigment, the transparent inorganic fiber being a hollow structure, and the pigment being located inside the cavity of the transparent inorganic fiber.

[0008] The colored fiber provided by the embodiments of the present disclosure places the pigment inside the cavity of the transparent inorganic fiber, so that the color of the pigment can be transmitted from the inside to the outside of the transparent inorganic fiber and then observed, thereby realizing the purpose of imparting color to the transparent inorganic fiber. Since the pigment is transmitted from the cavity of the transparent fiber to the outside through the transparent inorganic fiber body, the color of the colored fiber has permeability. On the one hand, the pigment is protected by the transparent inorganic fiber and is not easily abraded or damaged, which is beneficial to improve the color stability of the colored fiber. On the other hand, the material of the transparent inorganic fiber itself is not affected by the pigment, so that the colored fiber has all the advantages of inorganic fiber.

[0009] In the preparation of the colored fiber, the preparation method of the colored fiber is simple and easy to operate, and the cost is low, by placing the pigment inside the cavity of the transparent inorganic fiber, and the process of adding the pigment to the transparent inorganic fiber is not subject to too many restrictions, which is not only suitable for mass production of colored fibers, but also extremely advantageous for rapid customization of small batches of colored fibers of specific colors, meeting the customized demand for rapid iteration of colored fiber products.

[0010] In some possible implementations, the length of the colored fiber is greater than 10 mm, and further, the length of the colored fiber is greater than or equal to 5 cm, greater than or equal to 10 cm, greater than or equal to 20 cm, greater than or equal to 30 cm, greater than or equal to 40 cm, greater than or equal to 50 cm, greater than or equal to 60 cm, greater than or equal to 70 cm, greater than or equal to 80 cm, greater than or equal to 90 cm, or greater than or equal to 100 cm, etc.

[0011] In some possible implementations, the pigment includes at least one of toner, thermochromic pigment, photochromic pigment, and electrochromic pigment.

[0012] In some possible implementations, the pigment is not present inside part of the cavity of the transparent inorganic fiber.

[0013] In some possible implementations, the pigment completely fills all the cavities of the transparent inorganic fiber.

[0014] In another aspect, a colored fiber piece is provided, including: a plurality of colored fibers connected to each other;

[0015] The colored fiber is as described in any one of the above.

[0016] In the colored fiber piece provided by the embodiments of the present disclosure, a plurality of colored fibers are connected to each other to form the colored fiber piece, and the connection mode of the plurality of colored fibers is determined according to the structure of the colored fiber piece, and the connection mode between them includes but is not limited to: winding, weaving, etc.

[0017] In some possible implementations, the colored fiber piece is a fiber yarn or a fiber fabric.

[0018] In some possible implementations, among the plurality of colored fibers of the colored fiber piece, at least part of the colors of the colored fibers are different. This includes: the colors of part of the colored fibers are different (correspondingly, there are part of the colored fibers whose colors are the same); and the colors of all the colored fibers are different.

[0019] In some possible implementations, among the plurality of colored fibers of the colored fiber piece, the colors of the plurality of colored fibers are the same.

[0020] In another aspect, a fiber-reinforced composite material is provided, which includes a resin matrix and a reinforcement, the reinforcement being inside the resin matrix.

[0021] The reinforcement includes any of the colored fibers or colored fiber pieces described above.

[0022] The resin matrix can be a thermosetting resin or a thermoplastic resin. The thermosetting resin includes, but is not limited to, an epoxy resin, a phenolic resin, an unsaturated resin, and a curing agent corresponding to each of the resins, etc. The thermoplastic resin includes, but is not limited to, a polyester resin, etc. For example, the polyester resin includes, but is not limited to, a polycarbonate (PC), a thermoplastic urethane (TPU), etc.

[0023] Based on the use of the colored fiber piece provided by the embodiments of the present disclosure, the fiber-reinforced composite material provided by the embodiments of the present disclosure not only has a specific color, but also can present a variety of appearance effects. In addition, the fiber-reinforced composite material has a fiber-reinforced effect, so that the fiber-reinforced composite material has at least the advantages of light weight, high strength, excellent chemical resistance, etc. The mechanical properties of the fiber-reinforced composite material are much higher than those of the resin matrix.

[0024] In another aspect, a structural member is provided, which is prepared from the fiber-reinforced composite material described above.

[0025] In some examples, the structural member includes, but is not limited to, a housing member, a mechanical structural member, a plate, etc. For example, the housing can be used in electronic products (such as computers, mobile phones, sound boxes, cameras, etc.), home products, vehicle products (such as cars, etc.), chemical equipment products, etc. The mechanical structural member includes, but is not limited to, a screw, a clamp, a gear, a bearing, a sealing ring, etc. The plate includes, but is not limited to, a flat plate, a wavy plate, a bent plate, etc.

[0026] In another aspect, a method for preparing a colored fiber is provided, the colored fiber being described above, and the method for preparing the colored fiber includes: providing a pigment liquid, the pigment liquid including a pigment;

[0027] One end of a transparent inorganic fiber is immersed into the pigment liquid, so that the pigment liquid is absorbed into a cavity of the transparent inorganic fiber under the action of pressure to form a colored fiber intermediate;

[0028] The colored fiber intermediate is post-treated to obtain the colored fiber.

[0029] In some possible implementations, the absorption of the pigment liquid into the cavity of the transparent inorganic fiber under the action of pressure includes:

[0030] A negative pressure is applied to the other end of the transparent inorganic fiber, so that the pigment liquid is sucked into the cavity of the transparent inorganic fiber under the action of the negative pressure.

[0031] In some possible implementation manners, the fiber-reinforced composite material is as shown above;

[0032] The method for preparing the fiber-reinforced composite material comprises: preparing a colored fiber piece;

[0033] The colored fiber piece is used as a reinforcing body to be combined with a resin matrix, so that the fiber-reinforced composite material is obtained.

[0034] In some possible implementation manners, the preparation of the colored fiber piece comprises:

[0035] A transparent fiber piece is prepared by using a plurality of transparent inorganic fibers;

[0036] A pigment liquid containing pigments is provided;

[0037] One end of the transparent fiber piece is immersed into the pigment liquid, so that the pigment liquid is sucked into the cavities of the transparent inorganic fibers of the transparent fiber piece under the action of pressure, to form a colored fiber piece intermediate;

[0038] The colored fiber piece intermediate is post-processed, so that the colored fiber piece is obtained.

[0039] In some possible implementation manners, the sucking of the pigment liquid into the cavities of the transparent inorganic fibers of the transparent fiber piece under the action of pressure comprises:

[0040] A negative pressure is applied to the other end of the transparent fiber piece, so that the pigment liquid is sucked into the cavities of the transparent inorganic fibers of the transparent fiber piece under the action of the negative pressure.

[0041] In another aspect, another method for preparing a fiber-reinforced composite material is provided, and the fiber-reinforced composite material is as shown above;

[0042] The method for preparing the fiber-reinforced composite material comprises: combining a resin matrix and a plurality of transparent inorganic fibers to obtain a first composite material intermediate;

[0043] The first composite material intermediate is processed, so that two ends of the plurality of transparent inorganic fibers are exposed outside end faces of the resin matrix, to obtain a second composite material intermediate;

[0044] A pigment liquid including a pigment is provided, one end of a transparent inorganic fiber of the second composite material intermediate is immersed into the pigment liquid, the pigment liquid is inhaled into the cavity of the transparent inorganic fiber under the action of pressure, and a third composite material intermediate is obtained.

[0045] The third composite material intermediate is post-processed, and the fiber-reinforced composite material is obtained.

[0046] In some possible implementation manners, the inhaled pigment liquid into the cavity of the transparent inorganic fiber of the transparent fiber piece under the action of pressure includes:

[0047] The other end of the transparent inorganic fiber of the second composite material intermediate is applied with negative pressure, and the pigment liquid is inhaled into the cavity of the transparent inorganic fiber under the action of the negative pressure. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 A schematic diagram of a meridional cross section of an example colored fiber provided by an embodiment of the present disclosure;

[0049] Figure 2 A schematic diagram of a meridional cross section of another example colored fiber provided by an embodiment of the present disclosure;

[0050] Figure 3 A schematic diagram of an axial cross section of an example colored fiber provided by an embodiment of the present disclosure;

[0051] Figure 4 A schematic diagram of an axial cross section of another example colored fiber provided by an embodiment of the present disclosure;

[0052] Figure 5 A flowchart of preparation of an example colored fiber provided by an embodiment of the present disclosure;

[0053] Figure 6 A schematic diagram for inhaled pigment liquid into the cavity of the transparent inorganic fiber provided by an embodiment of the present disclosure;

[0054] Figure 7 A schematic diagram of a colored fiber piece of an example fiber yarn structure provided by an embodiment of the present disclosure;

[0055] Figure 8 A schematic diagram of a colored fiber piece of an example fiber fabric structure provided by an embodiment of the present disclosure;

[0056] Figure 9 A flowchart of preparation of an example colored fiber piece provided by an embodiment of the present disclosure;

[0057] Figure 10 A flowchart of preparation of another example colored fiber piece provided by an embodiment of the present disclosure;

[0058] Figure 11 An exemplary schematic diagram of an alternative coloring of a colored fiber fabric provided by an embodiment of the present disclosure;

[0059] Figure 12 An exemplary schematic diagram of a random coloring of a colored fiber fabric provided by an embodiment of the present disclosure;

[0060] Figure 13 An exemplary schematic diagram of a gradient coloring of a colored fiber fabric provided by an embodiment of the present disclosure;

[0061] Figure 14 An exemplary flow chart of a preparation of a fiber reinforced composite material provided by an embodiment of the present disclosure;

[0062] Figure 15 An exemplary schematic diagram of a combination of a reinforcing body and a resin matrix provided by an embodiment of the present disclosure;

[0063] Figure 16 An exemplary schematic diagram of a laying manner of a reinforcing body and a resin matrix provided by an embodiment of the present disclosure;

[0064] Figure 17 An exemplary schematic diagram of another combination of a reinforcing body and a resin matrix provided by an embodiment of the present disclosure;

[0065] Figure 18 An exemplary flow chart of a preparation of another fiber reinforced composite material provided by an embodiment of the present disclosure;

[0066] Figure 19 A corresponding structural arrangement diagram when a second composite material intermediate is prepared into a third composite material intermediate provided by an embodiment of the present disclosure.

[0067] The reference signs respectively represent:

[0068] 100 - transparent inorganic fiber,

[0069] 101 - cavity,

[0070] 200 - pigment,

[0071] 001 - colored fiber,

[0072] 002 - colored fiber piece,

[0073] 003 - resin matrix,

[0074] 004 - fiber reinforced composite material. DETAILED DESCRIPTION

[0075] In order to make the technical solutions and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the drawings.

[0076] Glass fiber is an inorganic fiber material with advantages such as high mechanical strength, strong heat resistance, and good corrosion resistance. Glass fiber reinforced composites also possess excellent strength and are widely used in various products that require both lightweight and high strength. As users' demands for product appearance and visual appeal increase, colored glass fibers have emerged. These colored glass fibers are obtained by coloring transparent glass fibers.

[0077] The methods for obtaining colored glass fibers provided by related technologies mainly include the following: (1) mixing color powder with the raw materials for preparing glass fibers and forming colored glass fibers in one piece by melt drawing; (2) coating a coloring layer on the surface of the glass fibers to obtain colored glass fibers.

[0078] Regarding the method mentioned in (1), since the pigment is directly mixed with the glass fiber, the raw material formula for colored glass fiber needs to be customized according to the target color. The raw material formula customization process requires multiple iterations to achieve the expected effect, which makes the mixing cost during production high. In addition, even if the demand for colored fiber is extremely low, it means that a large amount of glass raw materials will be wasted, resulting in higher production costs. This makes this method unable to meet the customization needs of rapid iteration of colored fiber products.

[0079] Regarding the method described in (2), the preparation of colored glass fibers by coating the surface of glass fibers with a coloring layer is quite difficult (for example, the coloring layer is easily worn during processes such as weaving, cutting, hot-pressing injection molding, and molding, or the coloring layer is destroyed due to insufficient heat resistance). Furthermore, the mechanical strength and heat resistance of the coloring layer are usually lower than those of the glass fiber, making the coloring layer extremely easy to wear during the application of colored glass fibers. In addition, the preparation of the coloring layer requires consideration of various properties such as the appearance, mechanical toughness, temperature resistance, and bonding strength with the glass fiber, which further increases the difficulty of preparation.

[0080] According to one aspect of this disclosure, embodiments of this disclosure provide a colored fiber 001, as shown in the attached... Figure 1 As shown, the colored fiber 001 includes: transparent inorganic fiber 100 and pigment 200, wherein the transparent inorganic fiber 100 has a hollow structure and the pigment 200 is located inside the cavity 101 of the transparent inorganic fiber 100.

[0081] The transparent inorganic fiber 100 with a hollow structure disclosed herein includes: a transparent inorganic fiber body and a cavity extending along the axial direction of the inorganic fiber body and penetrating both ends thereof.

[0082] All transparent inorganic material fibers are suitable for the embodiments of the present disclosure, wherein the transparency of the inorganic fiber is such that the color of the pigment 200 can be transmitted by the inorganic fiber body. In some examples, the transparent inorganic fiber 100 suitable for the embodiments of the present disclosure includes but is not limited to glass fiber or ceramic fiber, for example, the glass fiber can be quartz glass fiber, soda-lime glass fiber, aluminum-silicon glass fiber, etc.

[0083] Both types of inorganic fiber materials have the advantages of high mechanical strength, high heat resistance, good corrosion resistance, etc. The fiber reinforced composite material based on such inorganic fiber also has excellent strength and can be widely used in various products that require lightweight and high strength.

[0084] The colored fiber 001 provided by the embodiments of the present disclosure can realize the purpose of imparting color to the transparent inorganic fiber 100 by placing the pigment 200 inside the cavity 101 of the transparent inorganic fiber 100, and the color of the pigment 200 can be transmitted from the inside to the outside of the transparent inorganic fiber 100 and then observed. This makes the color of the colored fiber 001 have permeability. On the one hand, the pigment 200 is protected by the transparent inorganic fiber 100 and is not easy to be abraded or damaged, which is beneficial to improve the color stability of the colored fiber 001, and on the other hand, the material of the transparent inorganic fiber 100 itself is not affected by the pigment 200, so that the colored fiber 001 has all the advantages of inorganic fiber.

[0085] In the preparation of the colored fiber 001, by placing the pigment 200 inside the cavity 101 of the transparent inorganic fiber 100, the preparation method of the colored fiber 001 is simple and easy to operate, and the cost is low. Moreover, the process of adding the pigment 200 to the transparent inorganic fiber 100 is not subject to excessive restrictions, which is not only suitable for mass production of the colored fiber 001, but also extremely beneficial for rapid customization of small batches of colored fiber 001 of specific colors, meeting the customized needs of rapid iteration of the colored fiber 001 product.

[0086] For the colored fiber 001 provided by the embodiments of the present disclosure, the two ends of the transparent inorganic fiber 100 can be end-capped before the colored fiber 001 is applied, to seal the cavity of the transparent inorganic fiber 100 and prevent the pigment 200 from leaking therefrom. Alternatively, the two ends of the transparent inorganic fiber 100 can also be end-capped during the application of the colored fiber 001 to prevent the pigment 200 from leaking therefrom. The above end-capping treatment includes but is not limited to the form of sealing with a cured resin, etc.

[0087] In some implementations, the colored fiber 001 according to embodiments of the present disclosure is a long fiber, also known as a continuous fiber, which is distinguished from a short fiber, and the long fiber is more advantageous for increasing the strength of a composite material when used to prepare a fiber-reinforced composite material.

[0088] In some examples, the colored fiber 001 according to embodiments of the present disclosure has a length along the axial direction thereof greater than 10 mm, and further, the length of the colored fiber 001 is greater than or equal to 2 cm, greater than or equal to 5 cm, greater than or equal to 10 cm, greater than or equal to 20 cm, greater than or equal to 30 cm, greater than or equal to 40 cm, greater than or equal to 50 cm, greater than or equal to 60 cm, greater than or equal to 70 cm, greater than or equal to 80 cm, greater than or equal to 90 cm, or greater than or equal to 100 cm, etc.

[0089] As for the pigment 200, the pigment 200 according to embodiments of the present disclosure can have various types of colors, including conventional colors and unconventional colors. For example, the conventional colors include but are not limited to red, green, red, yellow, orange, cyan, blue, purple, black, etc., and the unconventional colors include but are not limited to fluorescent red, fluorescent orange, fluorescent yellow, fluorescent green, gold, silver, bronze, etc.

[0090] In one colored fiber 001, only one type of pigment 200 can be arranged, so that the colored fiber 001 only presents one color, or two or more colors can also be arranged at the same time, for example, two or more different colors are presented in sequence in segments along the axial direction of the colored fiber 001.

[0091] In some examples, the pigment 200 is in a solid form, so that when the colored fiber 001 is prepared, the pigment 200 can be mixed with a good solvent thereof to form a pigment liquid, the pigment liquid is placed inside the cavity of the transparent inorganic fiber 100, and then a drying process is performed, so as to complete the attachment of the pigment 200 inside the cavity of the transparent inorganic fiber 100.

[0092] In other examples, the pigment 200 is in a liquid form, so that when the colored fiber 001 is prepared, the pigment 200 can be directly used as a pigment liquid, the pigment liquid is placed inside the cavity 101 of the transparent inorganic fiber 100, and then an optional drying process is performed, so as to complete the attachment of the pigment 200 inside the cavity of the transparent inorganic fiber 100.

[0093] In embodiments of the present disclosure, the pigment 200 can be a pigment with a fixed color, or a pigment with a color that can change under certain conditions, and the types of the pigment 200 include but are not limited to at least one of toner, thermochromic pigment, photochromic pigment, and electrochromic pigment.

[0094] For the toner, it can be inorganic toner (e.g. oxide, chromate, sulfate, silicate, borate, molybdate, phosphate, vanadate, ferricyanide, hydroxide, sulfide, metal with color, etc.), and can also be organic toner (e.g. azo pigment, phthalocyanine pigment, anthraquinone, indigo group, quinacridone, dioxazine, etc. polycyclic pigment, arylmethane pigment, etc.).

[0095] For the thermochromic pigment, it presents one color below the thermochromic basic temperature and presents another color above the thermochromic basic temperature, and the thermochromic basic temperature of the thermochromic pigment includes but is not limited to: -5℃, 0℃, 5℃, 10℃, 16℃, 21℃, 31℃, 33℃, 38℃, 43℃, 45℃, 50℃, 65℃, 70℃, etc. For example, the thermochromic pigment includes but is not limited to: fluorane, triarylmethane, liquid crystal, spiropyran, Schiff base, etc.

[0096] For the photochromic pigment, it can present different colors (e.g. colorless to colored, or one color to another color) under different light intensities, for example, the photochromic pigment includes but is not limited to: copper oxide, silver chloride, silver bromide, diaryl ethylene derivative or azobenzene derivative, etc., which have the advantages of good photochromic effect and color diversity.

[0097] For the electrochromic pigment, it includes but is not limited to: viologen and its derivatives, anthraquinone, metal titanium phthalocyanine, aromatic amine, polypyrrole, polythiophene, etc.

[0098] For the distribution of the pigment 200 inside the cavity 101 of the transparent inorganic fiber 100, the following exemplary descriptions are made respectively:

[0099] In some implementations, as shown in the attached Figure 1 , the pigment 200 completely fills all the cavities 101 of the transparent inorganic fiber 100, i.e. the pigment 200 forms a solid column inside the cavity 101 of the transparent inorganic fiber 100, and the structure and size of the solid column match the structure and size of the cavity 101 of the transparent inorganic fiber 100, and the two are tightly fitted.

[0100] In some implementations, the pigment 200 is not arranged inside part of the cavities 101 of the transparent inorganic fiber 100, and the pigment 200 can be arranged inside part of the cavities 101 of the transparent inorganic fiber 100 in the following ways:

[0101] (1) As shown in the attached Figure 2 , the pigment 200 is attached to all or part of the inner walls of the cavities 101 of the transparent inorganic fiber 100 to form a colored layer, but the colored layer is a hollow structure (i.e. has a cavity).

[0102] (2) As attached Figure 3 As shown, the pigment 200 completely or partially fills only a portion of the axially extending cavity 101 of the transparent inorganic fiber 100, while the other portion of the axially extending cavity 101 does not contain any pigment 200. That is, the first portion of the cavity of the transparent inorganic fiber 100 contains pigment 200, while the second portion of the cavity of the transparent inorganic fiber 100 does not contain pigment 200. For example, the volume of the second portion of the cavity is 0.1-0.5 times the sum of the volumes of the first and second portions of the cavity, such as 0.1 times, 0.15 times, 0.2 times, 0.25 times, 0.3 times, 0.35 times, 0.4 times, 0.45 times, etc.

[0103] (3) As attached Figure 4 As shown, the pigment 200 does not completely fill the cavity 101 of the transparent inorganic fiber 100. The pigment 200 is located inside the cavity 101 of the transparent inorganic fiber 100 in a dispersed form, so that the pigment 200 exists in various forms inside the cavity 101 of the transparent inorganic fiber 100, such as in the form of a coloring layer attached to the inner wall of the cavity, or in the form of dispersed particles. However, the position of the pigment 200 inside the cavity of the transparent inorganic fiber 100 can vary (for example, depending on the different bending states of the colored fiber 001, the spatial arrangement of the colored fiber 001, etc., the position of the pigment 200 therein will change accordingly).

[0104] For any of the transparent inorganic fibers 100 shown above, their physical parameters are as follows, to ensure that the physical properties and color rendering properties of the colored fiber 001 reach the desired state:

[0105] The diameter (i.e., outer diameter) of the transparent inorganic fiber 100 is 5um-20um, for example, 5um, 8um, 10um, 11um, 12um, 13um, 14um, 15um, 16um, 17um, 18um, 19um, 20um, etc.

[0106] The hollowness of the transparent inorganic fiber 100 is greater than or equal to 30%, for example, greater than or equal to 40%, greater than or equal to 50%, greater than or equal to 60%, greater than or equal to 70%, greater than or equal to 80%, etc. Here, the hollowness of the fiber refers to the proportion of the area of ​​the hollow portion (i.e., the cavity portion) on the cross-section of a single transparent inorganic fiber 100 to the total cross-sectional area of ​​the transparent inorganic fiber 100.

[0107] In some possible implementations, the colored fiber 001 provided in this disclosure embodiment further includes an auxiliary agent configured to increase the bonding force between the pigment 200 and the inner wall of the cavity of the transparent inorganic fiber 100. For example, the auxiliary agent may be a coupling agent or the like that compatible with the pigment 200.

[0108] According to another aspect of the embodiments of the present disclosure, a method for preparing a colored fiber is also provided, wherein the colored fiber is any of the colored fibers shown above in the embodiments of the present disclosure, such as the colored fiber 001 shown in FIG. 1. Figure 5 As shown in FIG. 2, the method for preparing the colored fiber includes the following steps:

[0109] Step S101: providing a pigment liquid, wherein the pigment liquid includes a pigment.

[0110] Step S102: immersing one end of a transparent inorganic fiber into the pigment liquid, so that the pigment liquid is absorbed into the cavity of the transparent inorganic fiber under pressure to form a colored fiber intermediate (see FIG. 3). Figure 6 As shown in FIG. 3, wherein part A schematically shows the transparent inorganic fiber 100, and part B schematically shows the colored fiber intermediate 001.

[0111] Step S103: post-processing the colored fiber intermediate to obtain a colored fiber.

[0112] For step S101, the composition of the pigment liquid includes but is not limited to the following examples:

[0113] In some examples (1), the pigment is in a solid form, at this time, the pigment liquid can be obtained by mixing the pigment with a good solvent of the pigment. The good solvent is used to disperse the pigment in the pigment liquid, for example, the mass concentration of the pigment in the pigment liquid is 10%-90%, such as 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, etc.; the mass concentration of the pigment in the pigment liquid can be adjusted according to the desired color effect.

[0114] In some examples (2), the pigment is in a liquid form, in this case, the pigment can be directly used as the pigment liquid; further, in this example, the liquid form of the pigment can also be diluted with a solvent to obtain different color effects.

[0115] In some examples (3), the pigment is mixed with a curable resin to form a pigment liquid, and after the pigment liquid is filled into the cavity of the transparent inorganic fiber, the curable resin is cured, and the curing mode of the curable resin can be photocuring or thermal curing.

[0116] For step S102, by immersing one open end of the transparent inorganic fiber into the pigment liquid, and the other open end of the transparent inorganic fiber is not immersed in the pigment liquid but is located outside the pigment liquid, the pigment liquid is absorbed into the cavity of the transparent inorganic fiber under pressure. This method has good controllability and facilitates the arrangement of the pigment liquid in the cavity of the transparent inorganic fiber in various ways.

[0117] The pressure for the pigment liquid to be inhaled into the transparent inorganic fiber, in some examples, is from the pressure generated by the siphon effect, i.e. the pigment liquid is inhaled into the transparent inorganic fiber automatically under the siphon effect. In other examples, the pressure is from an externally applied pressure. The following is an exemplary description of the implementation of the externally applied pressure:

[0118] In some implementations, the pigment liquid is inhaled into the cavity of the transparent inorganic fiber under the pressure, including: applying a negative pressure to the other end of the transparent inorganic fiber, so that the pigment liquid is inhaled into the cavity of the transparent inorganic fiber under the negative pressure.

[0119] By applying a negative pressure to the open end of the transparent inorganic fiber outside the pigment liquid, the pigment liquid can be quickly inhaled into the cavity of the transparent inorganic fiber. And by changing the size of the negative pressure and the time of applying the negative pressure, the filling amount and filling position of the pigment liquid in the cavity of the transparent inorganic fiber can be adjusted, so that the arrangement of the pigment is more controllable and diversified.

[0120] In other implementations, the pigment liquid is inhaled into the cavity of the transparent inorganic fiber under the pressure, including: placing the pigment liquid in a closed container, one end of the transparent inorganic fiber sealingly passes through the closed container and is immersed into the interior of the pigment liquid, and the other end is located outside the closed container. A positive pressure is applied to the interior of the closed container, so that the pigment liquid is inhaled into the cavity of the transparent inorganic fiber under the positive pressure.

[0121] By applying a positive pressure to the open end of the transparent inorganic fiber outside the pigment liquid, the pigment liquid can be quickly inhaled into the cavity of the transparent inorganic fiber. And by changing the size of the positive pressure and the time of applying the positive pressure, the filling amount and filling position of the pigment liquid in the cavity of the transparent inorganic fiber can be adjusted, so that the arrangement of the pigment is more controllable and diversified.

[0122] The above-mentioned application of negative pressure and positive pressure can be implemented by conventional application methods in the art, which are not specifically limited here.

[0123] For step S103, the colored fiber intermediate is post-treated to obtain a colored fiber. The post-treatment method is selected according to the composition of the pigment liquid, and the following is an exemplary description of various post-treatment methods:

[0124] In some examples (1), the pigment liquid includes: a pigment in solid form and its good solvent. Correspondingly, the post-processing of the colored fiber intermediate includes: drying the colored fiber intermediate at a temperature sufficient to allow the good solvent of the pigment to evaporate rapidly without affecting the properties of the transparent inorganic fiber. For example, the drying temperature is 30°C-200°C, such as 40°C, 45°C, 50°C, 55°C, 60°C, 65°C, 70°C, 75°C, 80°C, 90°C, 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, 160°C, 170°C, 180°C, etc. Further, the drying process can be carried out, for example, in an oven.

[0125] In some examples (2), the pigment liquid includes pigment in liquid form, and correspondingly, the post-processing of the colored fiber intermediate includes: end-sealing the colored fiber intermediate to seal the two ends of the transparent inorganic fiber to prevent the liquid pigment from leaking out.

[0126] In some examples (3), the pigment liquid includes pigment and curable resin. Correspondingly, the post-processing of the colored fiber intermediate includes curing the curable resin in the colored fiber intermediate. The curing process can be a thermosetting process or a photosetting process. Through the curing process, not only is the curable resin fixed, but the pigment is also fixed therein.

[0127] According to another aspect of the embodiments of this disclosure, a colored fiber component 002 is also provided, as shown in the attached figure. Figure 7 Or attach Figure 8 As shown, the colored fiber component 002 includes: a plurality of interconnected colored fibers 001, wherein the colored fibers 001 are as shown in any of the embodiments of this disclosure above.

[0128] Multiple colored fibers can be provided in the form of fiber bundles, that is, multiple bundles of colored fibers are interconnected to form a colored fiber component. Each fiber bundle includes nK colored fibers, where K represents a unit of 1000, and n can be an integer between 1 and 50, for example, the fiber bundle can include 1K, 3K, 6K, 12K colored fibers, etc.

[0129] It is formed by connecting multiple bundles, such as 2 bundles, 5 bundles, 10 bundles, or 100 bundles of colored fibers. The connection method of the multiple colored fibers is determined according to the structure of the colored fiber component. The connection methods between them include, but are not limited to, winding and weaving. The corresponding colored fiber component can be fiber yarn or fiber fabric.

[0130] The methods for preparing this colored fiber component include, but are not limited to, the following two types:

[0131] In some implementations, as shown in FIG. 2A, the method for preparing the colored fiber piece includes: Figure 9

[0132] Step S211: preparing a colored fiber. The method for preparing the colored fiber can refer to the method described above, and will not be repeated here.

[0133] Step S212: using the plurality of colored fibers to prepare a colored fiber piece.

[0134] For example, the plurality of colored fibers are wound to form a yarn-shaped colored fiber piece, or the plurality of colored fibers are woven to form a fabric-shaped colored fiber piece.

[0135] When the plurality of colored fibers are used to prepare the colored fiber piece, the two ends of each colored fiber can be capped in advance, or the two ends of the plurality of colored fibers can be capped after the colored fiber piece is formed.

[0136] In other implementations, as shown in FIG. 2B, the method for preparing the colored fiber piece includes: Figure 10

[0137] Step S221: using a plurality of transparent fibers to prepare a transparent fiber piece. The transparent fiber piece is formed by connecting a plurality of, for example, greater than or equal to 2, 5, 10, 100, etc. transparent inorganic fibers to each other. Since the raw material for preparation is transparent inorganic fiber, the transparent fiber piece is also transparent.

[0138] The connection mode of the plurality of transparent inorganic fibers is determined according to the structure of the transparent fiber piece, and the connection mode therebetween includes but is not limited to winding, weaving, etc.

[0139] Step S222: providing a pigment liquid including a pigment. The composition of the pigment liquid can refer to the description above, and will not be repeated here.

[0140] Step S223: immersing one end of the transparent fiber piece into the pigment liquid, so that the pigment liquid is sucked into the cavities of the plurality of transparent inorganic fibers of the transparent fiber piece under the action of pressure, forming a colored fiber piece intermediate.

[0141] For example, negative pressure is applied to the other end of the transparent fiber piece (specifically, negative pressure is applied to the opening end of the plurality of transparent inorganic fibers located outside the pigment liquid), so that the pigment liquid is sucked into the cavities of the plurality of transparent fibers of the transparent fiber piece under the action of the negative pressure.

[0142] ​​Step S224: post-treating the colored fiber piece intermediate to obtain the colored fiber piece. The post-treatment of the colored fiber piece intermediate can refer to the post-treatment of the colored fiber intermediate.

[0143] The colored fiber piece according to the embodiments of the present disclosure can have various forms, including but not limited to fiber yarns and fiber fabrics. The two forms are described below.

[0144] For the fiber yarn, the fiber yarn can be formed by connecting a plurality of colored fibers in a winding manner. The winding between the plurality of colored fibers is also referred to as twisting. The twisting direction can be S-twist or Z-twist. For example, the fiber yarn can be formed by connecting a plurality of colored fibers in a winding manner. Figure 7 An example of the structure of the fiber yarn is shown.

[0145] The physical parameters of the fiber yarn according to the embodiments of the present disclosure can be as follows:

[0146] The hollow ratio of the fiber yarn is greater than or equal to 90%, including but not limited to 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, etc. The hollow ratio refers to the proportion of the number of transparent inorganic fibers with hollow structure in the fiber yarn to the total number of all transparent inorganic fibers in the fiber yarn.

[0147] The twist of the fiber yarn is 10 T / m-50 T / m, for example, 50 T / m. The twist of the fiber yarn refers to the number of twists per unit length of the fiber yarn.

[0148] In some examples, the preparation method of the colored fiber yarn can refer to the preparation method of the transparent fiber yarn. Figure 6 One end of the transparent fiber yarn is immersed into the pigment liquid, and the pigment liquid is absorbed into the cavities of the plurality of transparent inorganic fibers of the transparent fiber yarn under the action of pressure to form a colored fiber yarn intermediate. Then, the colored fiber yarn intermediate is taken out and dried to obtain a colored fiber yarn.

[0149] For the fiber fabric, including fiber cloth, fiber belt, fiber unidirectional fabric, fiber three-dimensional fabric, etc., the fiber fabric can be formed by connecting a plurality of colored fibers or a plurality of fiber yarns in a weaving manner.

[0150] The weaving manner of the fiber fabric can adopt a common weaving manner. For example, the weaving manner of the fiber cloth includes but is not limited to plain weave, twill weave, etc. For example, the fiber cloth can be formed by connecting a plurality of colored fibers in a weaving manner. Figure 8 An example of the structure of the fiber fabric is shown.

[0151] In some examples, the fiber fabric is a fiber cloth, which can have a thickness of 0.2-0.8 mm, a width of 80-150 mm, and a length of 100-300 mm, for example, a thickness of 0.5 mm, a width of 100 mm, and a length of 200 mm.

[0152] The colored fiber piece provided by the embodiments of the present disclosure includes a plurality of colored fibers, in some examples, all the fibers included in the colored fiber piece are the colored fibers provided by the embodiments of the present disclosure, in other examples, part of the fibers included in the colored fiber piece are the colored fibers provided by the embodiments of the present disclosure.

[0153] For the plurality of colored fibers of the colored fiber piece, the colors of the plurality of colored fibers can be the same, i.e., only one color is presented. At least part of the colored fibers can also have different colors, which includes: part of the colored fibers have different colors (correspondingly, part of the colored fibers have the same color); and all the colored fibers have different colors.

[0154] Taking the colored fiber piece as an example, the fiber fabric includes a plurality of colored fibers (referred to as warp colored fibers) distributed in the warp direction in sequence and parallel to each other, and a plurality of colored fibers (referred to as weft colored fibers) distributed in the weft direction in sequence and parallel to each other.

[0155] In the fiber fabric, at least part of the colored fibers have different colors, and the different colors can be implemented in various ways, including but not limited to: alternating coloring using multiple colors, irregular coloring using multiple colors, regular coloring using multiple colors to form a specific pattern, gradient coloring using multiple colors, etc., which are described below respectively:

[0156] (1) In some examples, the colors of the plurality of weft colored fibers are the same or are alternately colored in sequence, and the plurality of warp colored fibers are alternately colored in sequence. For alternating coloring, two different colors can be used for alternating coloring, for example, first color-second color-first color-second color…, or three or more different colors can be used for alternating coloring, for example, first color-second color-third color-first color-second color-third color…. Figure 11 An example of a fiber fabric using alternating coloring is shown, wherein, Figure 11 The first color in the above formula is represented by C1, and the second color is represented by C2.

[0157] (2) In some examples, multiple weft-direction colored fibers are made to have the same color, or alternately colored, or randomly colored, while multiple warp-direction colored fibers are randomly colored. Regarding random coloring, two, three, four, or more colors can be used. For example, first color - second color - third color - second color - fourth color - first color - third color, etc. Figure 12 An example is given of a fiber fabric using an irregular coloring method, wherein, Figure 12 The first color in the diagram is represented by C1, the second color by C2, the third color by C3, the fourth color by C4, and the fifth color by C5.

[0158] (3) In some examples, multiple weft-direction colored fibers are made to have the same color, or to be gradually colored according to a certain pattern, while multiple warp-direction colored fibers are gradually colored according to a certain pattern. Gradual coloring refers to achieving this by adjusting the shade of a base color. For example, the color of multiple colored fibers gradually lightens from the colored fiber in the middle position to the colored fibers on both sides. (Appendix) Figure 13 An example is a fiber fabric using a gradient coloring method, wherein, Figure 13 The primary color in the code is represented by C10, and C13, C12, and C11 refer to colors that are progressively lighter than C10.

[0159] (4) In some examples, the colors of multiple weft colored fibers are made to be exactly the same, or to be colored alternately in sequence, and the colors of multiple warp colored fibers are colored regularly to form a specific pattern, such as, but not limited to, indicator marks, product shape marks, etc.

[0160] In some examples, the preparation methods for the aforementioned colored fiber fabrics are as follows: The transparent inorganic fibers requiring coloring in the transparent fiber components are classified according to their coloring method. Each type of transparent inorganic fiber is then colored sequentially to acquire a specific color, followed by drying to achieve color fixation. After all types of transparent inorganic fibers have been colored sequentially in the above manner, the colored fiber fabric is obtained.

[0161] According to another aspect of the embodiments of this disclosure, as shown in the appendix Figure 16 As shown, a fiber-reinforced composite material 004 is provided, which includes a resin matrix 003 and a reinforcement, wherein the reinforcement is located inside the resin matrix 003; wherein the reinforcement includes any of the colored fibers 001 or any of the colored fiber parts 002 described in the embodiments of this disclosure.

[0162] In some examples, the reinforcing body comprises a plurality of colored fibers that are not connected to each other, and the plurality of colored fibers can exist in the form of fiber bundles, for example, a plurality of fiber bundles are arranged in a certain geometric pattern, and they are not connected to each other.

[0163] In other examples, the reinforcing body comprises a colored fiber piece formed by a plurality of colored fibers connected to each other as shown above.

[0164] The fiber-reinforced composite material provided by the embodiments of the present disclosure can comprise one reinforcing body, or can comprise a plurality of reinforcing bodies distributed in sequence and at intervals. For the case of comprising a plurality of reinforcing bodies, there is a resin matrix between any two adjacent reinforcing bodies, and for the arrangement of colored fibers or colored fiber pieces in the plurality of reinforcing bodies, all layers can be the same, some layers can be the same, or all layers can be different.

[0165] Exemplarily, the resin matrix can be a thermosetting resin or a thermoplastic resin, the thermosetting resin includes but is not limited to epoxy resin, phenolic resin, unsaturated resin, and optional curing agent corresponding to each resin, etc., and the thermoplastic resin includes but is not limited to polyester resin, etc., for example, the polyester resin includes but is not limited to polycarbonate (PC), thermoplastic urethane (TPU), etc.

[0166] In some examples, the mass ratio of the reinforcing body to the resin matrix is (0.1-25):1, for example, 0.5:1, 1:1, 5:1, 10:1, 15:1, 20:1, 25:1, etc.

[0167] The fiber-reinforced composite material obtained by combining the thermoplastic resin with the colored fiber piece has the advantages of high strength, excellent fatigue resistance, high impact toughness, excellent creep resistance, etc. The fiber-reinforced composite material obtained by combining the thermosetting resin with the colored fiber piece has the advantages of high strength, light weight, excellent corrosion resistance, excellent heat resistance, etc.

[0168] Based on the use of the colored fiber provided by the embodiments of the present disclosure, the fiber-reinforced composite material provided by the embodiments of the present disclosure not only has a specific color and can present a variety of appearance effects, but also obtains a fiber-reinforced effect, so that the fiber-reinforced composite material at least has the advantages of light weight, high strength, excellent chemical resistance, etc., and its mechanical properties are much higher than those of the resin matrix.

[0169] According to another aspect of the present disclosure, a method for preparing a fiber-reinforced composite material is provided, wherein the fiber-reinforced composite material is any of the fiber-reinforced composite materials described in the embodiments of the present disclosure. The method for preparing the fiber-reinforced composite material may include the following two types of approaches:

[0170] (1) Among some possible implementations, such as the appendix Figure 14 As shown, the preparation method of this fiber-reinforced composite material includes:

[0171] Step S311: Prepare the colored fiber component. The method for preparing the colored fiber component can be found in the method described above.

[0172] For example, the preparation of colored fiber parts includes: using multiple transparent inorganic fibers to prepare transparent fiber parts;

[0173] A pigment liquid containing pigment is provided; one end of a transparent fiber is immersed in the pigment liquid, causing the pigment liquid to be drawn into the cavity of the transparent inorganic fibers of the transparent fiber under pressure, forming a colored fiber intermediate; the colored fiber intermediate is then post-processed to obtain a colored fiber. The post-processing method for the colored fiber intermediate can refer to the method described above, for example, the post-processing could be a drying process.

[0174] In some examples, drawing the pigment liquid into the cavity of the transparent inorganic fibers of the transparent fiber piece under pressure includes: applying a negative pressure to the other end of the transparent fiber piece, causing the pigment liquid to be drawn into the cavity of the transparent inorganic fibers under negative pressure. Alternatively, applying a positive pressure to the system containing the pigment liquid, causing the pigment liquid to be drawn into the cavity of the transparent inorganic fibers of the transparent fiber piece under positive pressure.

[0175] Step S312: Use colored fiber parts as reinforcements to combine with the resin matrix to obtain fiber-reinforced composite materials.

[0176] As attached Figure 15 As shown, the methods for achieving the combination of the colored fiber component and the resin matrix involved in step S312 include the following:

[0177] Step S3121: Provide a film-like resin matrix, and alternately stack the resin matrix and colored fiber components to form a composite. (See attached image) Figure 16 As shown, a film-like resin matrix 003 and a colored fiber component 002 are alternately stacked to form a composite body, wherein the bottom and top layers of the composite body are both resin matrix 003.

[0178] The resin matrix 003 can be a thermoplastic resin or a thermosetting resin. The number of alternations of the resin matrix 003 and the colored fiber member 002 is adjusted according to the thickness of the fiber-reinforced composite material, for example, the number of alternations is greater than or equal to 2 times.

[0179] When the colored fiber member is a fiber yarn, a plurality of fiber yarns can be laid on the surface of the resin matrix in a certain arrangement, for example, a plurality of fiber yarns are arranged in the warp direction and the weft direction in turn. When the colored fiber member is a fiber fabric, one or more fiber fabrics can be directly laid on the surface of the resin matrix.

[0180] Further, before step S3121, the resin matrix and the colored fiber member can be cut respectively, so that the sizes of the two after cutting meet the preparation requirements of the structural member, which is a product prepared from the fiber-reinforced composite material. For example, the sizes of the resin matrix and the colored fiber member after cutting are slightly larger than the size of the structural member.

[0181] Step S3122: hot pressing the superimposed body to obtain a fiber-reinforced composite material. The superimposed body is obtained from step S3121, the hot pressing process can be carried out in a hot pressing mold, and the temperature and time of hot pressing are determined according to the specific material of the resin matrix, which can effectively complete the curing of the resin matrix.

[0182] In some examples, the prepared fiber-reinforced composite material can be used to prepare a structural member through a computerized numerical control (CNC) machining process (referred to as CNC machining).

[0183] When the resin matrix is a thermosetting resin, as shown in FIG. 4, the implementation mode of the combination of the colored fiber member and the resin matrix in step S312 can further include the following: Figure 17

[0184] Step S3123: obtaining a resin solution by using the resin matrix; for the resin matrix which is liquid and has appropriate viscosity, it can be used directly; for the resin matrix with high viscosity, a good solvent thereof is used to dilute to obtain a resin solution with appropriate viscosity.

[0185] Step S3124: immersing the colored fiber member into the resin solution, taking it out after sufficient impregnation, and obtaining a colored fiber prepreg. For the resin solution containing a solvent, the solvent in the corresponding colored fiber prepreg needs to be volatilized.

[0186] ​Further, the number of layers of the colored fiber prepreg is determined according to the thickness of the fiber reinforced composite material, for example, a plurality of colored fiber preps can be sequentially laminated to obtain a colored fiber prep having a target thickness. Wherein, the number of lamination layers is adjusted according to the thickness of the fiber reinforced composite material, for example, the number of lamination layers is greater than or equal to 2 times.

[0187] Step S3125: hot pressing the colored fiber prep to obtain a fiber reinforced composite material. Wherein, the hot pressing process can be carried out in a hot pressing mold, and the temperature and time of hot pressing are determined according to the specific material of the resin matrix, which can effectively complete the curing of the resin matrix.

[0188] When the colored fiber piece is a fiber yarn, a plurality of fiber yarns can be laid according to a certain arrangement and impregnated in the resin solution, for example, a plurality of fiber yarns are sequentially distributed according to the warp and weft. When the colored fiber piece is a fiber fabric, one or more fiber fabrics can be directly laid and impregnated in the resin solution.

[0189] Further, before step S3124, the colored fiber piece can also be cut respectively, so that the size of the cut colored fiber piece meets the preparation requirements of the structural part, wherein the structural part is a product prepared from the fiber reinforced composite material. For example, the size of the cut colored fiber piece is slightly larger than the size of the structural part.

[0190] In some examples, the prepared fiber reinforced composite material can be used to prepare a structural part through a CNC machining process.

[0191] (2) In some possible implementations, as shown in FIG. 8, the method for preparing the fiber reinforced composite material includes: Figure 18

[0192] Step S321: combining the resin matrix and the plurality of transparent inorganic fibers to obtain a first composite material intermediate, wherein the combination of the resin matrix and the plurality of transparent inorganic fibers can refer to the combination of the resin matrix and the colored fiber piece as described above, which will not be repeated here.

[0193] The plurality of transparent inorganic fibers can exist in the form of transparent fiber pieces, such as transparent fiber yarns or transparent fiber fabrics, or the plurality of transparent inorganic fibers can also exist in the form of fiber bundles, for example, a plurality of transparent fiber bundles are arranged according to a certain geometric pattern.

[0194] Step S322: processing the first composite material intermediate so that both ends of the plurality of transparent inorganic fibers are exposed outside the end face of the resin matrix to obtain a second composite material intermediate.

[0195] ​The resin matrix involved in the second composite intermediate is a cured resin matrix obtained after the raw resin matrix is hot-pressed. As shown in FIG. 3, the second composite intermediate includes a resin matrix 003 and a plurality of transparent inorganic fibers 100. Figure 19

[0196] In some examples, the first composite intermediate can be processed by a CNC machining process, so that both ends of the transparent fiber piece are exposed outside the end face of the resin matrix, that is, both open ends of the plurality of transparent inorganic fibers included in the transparent fiber piece are located outside the end face of the resin matrix instead of being closed therein, and the size of the obtained second composite intermediate needs to be larger than that of the finally prepared structural piece.

[0197] Step S323: providing a pigment liquid including pigments, and immersing one end of the transparent inorganic fiber of the second composite intermediate into the pigment liquid, so that the pigment liquid is sucked into the cavity of the transparent inorganic fiber under the action of pressure, to obtain a third composite intermediate.

[0198] As shown in FIG. 4, the second composite intermediate includes a resin matrix 003 and a plurality of transparent inorganic fibers 100. Figure 19 As shown in FIG. 4, the second composite intermediate includes a resin matrix 003 and a plurality of transparent inorganic fibers 100.

[0199] For step S323, the pigment liquid is sucked into the cavity of the transparent inorganic fiber under the action of pressure, including: (1) applying negative pressure to the other end of the transparent inorganic fiber of the second composite intermediate, so that the pigment liquid is sucked into the cavity of the transparent inorganic fiber under the action of negative pressure. Alternatively, (2) applying positive pressure to the system in which the pigment liquid is located, so that the pigment liquid is sucked into the cavity of the transparent inorganic fiber under the action of positive pressure.

[0200] Step S324: post-treating the third composite intermediate to obtain a fiber-reinforced composite material. The post-treatment of the third composite intermediate can be in the manner as described above for the post-treatment of the colored fiber intermediate, for example, the post-treatment can be a drying treatment.

[0201] The fiber-reinforced composite material obtained in step S324 includes a plurality of colored fibers, which can exist in the form of a colored fiber piece, such as colored fiber yarns or colored fiber cloth, or the plurality of transparent inorganic fibers can exist in the form of a colored fiber bundle, such as a plurality of colored fiber bundles arranged in a certain geometric pattern.

[0202] ​In some examples, the post-treatment of the third composite intermediate is a drying treatment, which can be a drying treatment at a set temperature, for example, a drying treatment in an oven, and the drying temperature is sufficient to enable the solvent in the pigment liquid to be sufficiently volatilized.

[0203] The method for preparing the fiber-reinforced composite material according to the embodiments of the present disclosure can be used to prepare a fiber-reinforced composite material with more colorful color effects. Compared with the fiber-reinforced composite material prepared by the prior art, the method for preparing the fiber-reinforced composite material with a certain color according to the embodiments of the present disclosure has the advantages of short process, low cost, and strong material performance stability.

[0204] According to still another aspect of the embodiments of the present disclosure, a structural member is also provided, which is prepared from the fiber-reinforced composite material according to the embodiments of the present disclosure.

[0205] In some examples, the structural member includes, but is not limited to, a housing member, a mechanical structural member, a plate, and the like. For example, the housing can be used in electronic products (such as computers, mobile phones, sound boxes, cameras, and the like), household products, vehicle products (such as cars, and the like), and chemical equipment products. The mechanical structural member includes, but is not limited to, a screw, a clamp, a gear, a bearing, a sealing ring, and the like. The plate includes, but is not limited to, a flat plate, a wavy plate, a bent plate, and the like.

[0206] For the method for preparing the structural member, it includes, but is not limited to, the following: (1) first preparing the fiber-reinforced composite material according to the above method, and then preparing the structural member by using a CNC processing process; (2) based on the colored fiber member and the resin matrix, preparing the structural member by using a wet molding process; and (3) based on the colored fiber member and the resin matrix, preparing the structural member by using a resin transfer molding process.

[0207] For the terms “each”, “multiple”, “any”, and the like used in the embodiments of the present disclosure, the multiple includes two or more, each refers to each of the corresponding multiple, and any refers to any one of the corresponding multiple.

[0208] The above description is only for the convenience of those skilled in the art to understand the technical solutions of the present disclosure, and is not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, and the like made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A fiber-reinforced composite material, characterized in that, The fiber-reinforced composite material includes a resin matrix and a reinforcement, wherein the reinforcement is located inside the resin matrix; The reinforcing body includes colored fibers or colored fiber components; The colored fiber includes: transparent inorganic fiber (100) and pigment (200), wherein the transparent inorganic fiber (100) has a hollow structure and a hollowness greater than or equal to 30%, and the pigment (200) is in solid form and is attached to the cavity (101) inside the transparent inorganic fiber; The colored fiber component includes: multiple interconnected colored fibers; The pigment (200) includes at least one of the following: color powder, thermochromic pigment, photochromic pigment, and electrochromic pigment.

2. The fiber-reinforced composite material according to claim 1, characterized in that, The length of the colored fiber (001) is greater than 10 mm.

3. The fiber-reinforced composite material according to claim 1, characterized in that, The transparent inorganic fiber (100) does not contain the pigment (200) in some of its cavities.

4. The fiber-reinforced composite material according to claim 1, characterized in that, The pigment (200) fills all the cavities of the transparent inorganic fiber (100).

5. The fiber-reinforced composite material according to claim 1, characterized in that, The colored fiber component (002) is a fiber yarn or fiber fabric.

6. The fiber-reinforced composite material according to claim 5, characterized in that, In the multiple colored fibers (001) of the colored fiber component (002), at least some of the colored fibers (001) are of different colors.

7. The fiber-reinforced composite material according to claim 5, characterized in that, In the multiple colored fibers (001) of the colored fiber component (002), the multiple colored fibers (001) are all the same color.

8. A structural component, characterized in that, The structural component is prepared using the fiber-reinforced composite material as described in any one of claims 1-7.

9. A method for preparing a fiber-reinforced composite material, characterized in that, The fiber-reinforced composite material is as described in any one of claims 1-7; The method for preparing the fiber-reinforced composite material includes: preparing colored fiber parts; The colored fiber component is used as a reinforcement and combined with a resin matrix to obtain the fiber-reinforced composite material.

10. The method for preparing the fiber-reinforced composite material according to claim 9, characterized in that, The preparation of the colored fiber parts includes: Transparent fiber components were prepared using multiple transparent inorganic fibers. Provide pigment liquid containing pigments; One end of the transparent fiber is immersed in the pigment liquid, and the pigment liquid is drawn into the cavity of the transparent inorganic fiber of the transparent fiber under pressure to form a colored fiber intermediate. The colored fiber intermediate is post-processed to obtain the colored fiber part.

11. The method for preparing the fiber-reinforced composite material according to claim 10, characterized in that, The process of drawing the pigment liquid into the cavity of the transparent inorganic fiber of the transparent fiber component under pressure includes: A negative pressure is applied to the other end of the transparent fiber component, causing the pigment liquid to be drawn into the cavity of the transparent inorganic fiber of the transparent fiber component under the action of the negative pressure.

12. A method for preparing a fiber-reinforced composite material, characterized in that, The fiber-reinforced composite material is as described in any one of claims 1-7; The method for preparing the fiber-reinforced composite material includes: combining a resin matrix with multiple transparent inorganic fibers to obtain a first composite material intermediate; The first composite material intermediate is processed so that the two ends of the multiple transparent inorganic fibers are exposed outside the end face of the resin matrix to obtain the second composite material intermediate. A pigment liquid containing pigments is provided, and one end of a transparent inorganic fiber of the second composite material intermediate is immersed into the pigment liquid, so that the pigment liquid is drawn into the cavity of the transparent inorganic fiber under pressure to obtain a third composite material intermediate. The third composite material intermediate is post-processed to obtain the fiber-reinforced composite material.

13. The method for preparing the fiber-reinforced composite material according to claim 12, characterized in that, The process of drawing the pigment liquid into the cavity of the transparent inorganic fiber under pressure includes: A negative pressure is applied to the other end of the transparent inorganic fiber of the second composite material intermediate, causing the pigment liquid to be drawn into the cavity of the transparent inorganic fiber under the action of the negative pressure.

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