CN114507990A - Carbon fiber composite decorative film and preparation method thereof - Google Patents

Carbon fiber composite decorative film and preparation method thereof Download PDF

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Publication number
CN114507990A
CN114507990A CN202011290876.6A CN202011290876A CN114507990A CN 114507990 A CN114507990 A CN 114507990A CN 202011290876 A CN202011290876 A CN 202011290876A CN 114507990 A CN114507990 A CN 114507990A
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carbon fiber
water
resin
aqueous
slurry
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Chinese (zh)
Inventor
刘若鹏
赵治亚
刘凯
杨玉
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Luoyang Institute of Cutting Edge Technology
Luoyang Cutting Edge Equipment Technology Ltd
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Luoyang Institute of Cutting Edge Technology
Luoyang Cutting Edge Equipment Technology Ltd
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Priority to CN202011290876.6A priority Critical patent/CN114507990A/en
Publication of CN114507990A publication Critical patent/CN114507990A/en
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    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06PDYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06PDYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/52General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
    • D06P1/5207Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • D06P1/525Polymers of unsaturated carboxylic acids or functional derivatives thereof
    • D06P1/5257(Meth)acrylic acid
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06PDYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/52General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
    • D06P1/5264Macromolecular compounds obtained otherwise than by reactions involving only unsaturated carbon-to-carbon bonds
    • D06P1/5271Polyesters; Polycarbonates; Alkyd resins
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06PDYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/52General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
    • D06P1/5264Macromolecular compounds obtained otherwise than by reactions involving only unsaturated carbon-to-carbon bonds
    • D06P1/5285Polyurethanes; Polyurea; Polyguanides
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06PDYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/60General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing polyethers
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06PDYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P3/00Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
    • D06P3/80Inorganic fibres

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Laminated Bodies (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

The invention provides a carbon fiber composite decorative film and a preparation method thereof. The carbon fiber composite decorative film comprises a carbon fiber fabric, an elastic water-based resin film and a coloring pigment, wherein the carbon fiber fabric is woven by carbon fibers; the elastic water-based resin film is coated on the surface of the carbon fiber fabric; the coloring pigment is dispersed in the elastic water-based resin film, and is selected from nano transparent pigment and/or micro-nano temperature-sensitive color-changing pigment. The invention utilizes the high color rendering property of the nano transparent pigment and the micro-nano temperature-sensitive color-changing pigment, particularly the high transparency and the high color rendering property of the nano transparent pigment, takes the elastic water-based resin as the adhesive, and organically combines the carbon fiber fabric, the elastic water-based resin film and the two coloring pigments, thereby not only keeping the high-brightness three-dimensional texture of the carbon fiber fabric to the maximum extent, but also endowing the carbon fiber fabric with a certain degree of color hue, and realizing the compatibility of the high-brightness carbon fiber texture and the color.

Description

Carbon fiber composite decorative film and preparation method thereof
Technical Field
The invention relates to the technical field of carbon fiber composite materials, in particular to a carbon fiber composite decorative film and a preparation method thereof.
Background
The carbon fiber composite material part has the characteristic of structural and appearance integration due to the obvious three-dimensional fiber texture effect, and is widely applied to the fields of high-end automobile bodies, interior and exterior decorating parts of aircrafts, high-end bags and the like.
However, most of the resins used in the current carbon fiber composite materials are thermosetting resins and thermoplastic resins, and most of the thermosetting resins are hot-melt epoxy resins, and the currently mainstream hot-press molding process is to impregnate the resin into the fibers to form a prepreg, then to lay the prepreg in a certain shape, and to cure and mold the prepreg under pressure and heat. The processing method of the prepreg comprises a wet method and a dry method, wherein the wet method is to dissolve thermosetting resin in a solvent, and a continuous fiber cloth or a filament bundle is immersed in a glue solution tank to immerse the resin in the fiber bundle to form the prepreg; the dry process is that hot melt resin is coated on release paper to prepare an adhesive film, and then the adhesive films are attached to the upper surface and the lower surface of continuous fiber cloth, and the resin is impregnated into fiber cloth tows through a hot pressing process to prepare the prepreg. One of the thermoplastic prepreg forming methods can refer to chinese patent CN104859158B, the processes from fiber cloth to prepreg to composite material forming are numerous, the process is complex, the cost is high, and the formed composite material needs to be machined, the cost is high, the forming is difficult, and the appearance is not easy to change.
In addition, most of the surface colors of the existing carbon fiber decorative film products are natural black textures, and the existing carbon fiber decorative film products cannot be industrially dyed, and the existing carbon fiber decorative film products are mainly made to have specific colors by adopting modes of dyeing aramid fibers and carbon fibers in a mixed way (CN104908395A), colored metal wires in a mixed way and carbon fibers in a mixed way, plating layers/grafting coating preparation of colored carbon fibers (CN108867025A/CN106149383B) and the like.
In a word, the existing carbon fiber decorative film products mostly have the problems of difficult coloring, complex processing procedures and the like, and the application range and the prospect of the carbon fiber decorative film products are greatly limited.
Disclosure of Invention
The invention mainly aims to provide a carbon fiber composite decorative film and a preparation method thereof, and aims to solve the problems of difficult coloring, complex processing procedures and the like of a carbon fiber decorative film product in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a carbon fiber composite decorative film including: the carbon fiber fabric is formed by weaving carbon fibers; the elastic water-based resin film is coated on the surface of the carbon fiber fabric; and the coloring pigment is dispersed in the elastic water-based resin film and is selected from nano transparent pigment and/or micro-nano temperature-sensitive color-changing pigment.
Furthermore, the raw material of the elastic water-based resin film comprises elastic aqueous resin liquid and a cross-linking agent, the elastic aqueous resin liquid comprises one or more of aqueous aliphatic polyurethane liquid, aqueous epoxy resin liquid, aqueous polyurea modified polyurethane liquid and aqueous polycarbonate modified polyurethane liquid, and the cross-linking agent is water-dispersible isocyanate.
Further, the raw material of the elastic water-based resin film also comprises an aqueous sizing agent, wherein the aqueous sizing agent comprises one or more of film-forming resin, a wetting agent and a coupling agent, and the film-forming resin is selected from one or more of aqueous epoxy resin, aqueous polyurethane and aqueous polyvinylidene fluoride; the wetting agent is selected from one or more of TEGO250, Levelol W-469, GS-2227 and L77; the coupling agent is selected from one or more of KH550, KH792, GE A-1122 and KBM-603.
Further, the raw material of the elastic water-based resin film also comprises an aqueous rheological additive, and the aqueous rheological additive is selected from one or more of WT125, GS-1703, BYK-420 and TEGO 100.
Furthermore, the coloring pigment is 0.33-2.7% of the dry weight of the elastic water-based resin film, and the nano transparent pigment is selected from one or more of water-dispersible phthalocyanine green, water-dispersible phthalocyanine blue, water-dispersible Turnbull blue, water-based JNL-401 blue and SWN-W-60231; the micro-nano temperature-sensitive color-changing pigment is selected from one or more of 313C sky blue, 238C rose red, Green C grass Green, H16 Green and H50 pink, and the color-changing temperature of the micro-nano temperature-sensitive color-changing pigment is-15-70 ℃.
According to another aspect of the present invention, there is also provided a method for preparing the carbon fiber composite decorative film, which comprises the following steps: mixing elastic water-based resin liquid, a cross-linking agent and a coloring pigment to form resin slurry; and (3) soaking the carbon fiber fabric into the resin slurry, taking out and curing to obtain the carbon fiber composite decorative film.
Further, the resin slurry also comprises an aqueous sizing agent, and the step of preparing the resin slurry comprises the following steps: mixing the elastic water-based resin liquid and the water-based sizing agent, and dispersing under a stirring state to obtain a first dispersion liquid; adding a coloring pigment into the first dispersion liquid, and dispersing under stirring to obtain a second dispersion liquid; adding water into the second dispersion to obtain a third dispersion; standing the third dispersion liquid in a sealed state to obtain slurry to be coated; and adding a cross-linking agent into the slurry to be coated to form resin slurry.
Further, the weight of the water-based sizing agent is 2-8.5% of the weight of the elastic water-based resin liquid, the weight of the coloring pigment is 1-5% of the weight of the elastic water-based resin liquid, the weight of the water is 4.4-17% of the weight of the elastic water-based resin liquid, and the weight of the cross-linking agent is 2.4-3.5% of the weight of the elastic water-based resin liquid.
Further, after the cross-linking agent is added to the slurry to be coated, the step of preparing the resin slurry further comprises: and further adding a water-based rheological additive into the slurry to be coated to form resin slurry, wherein the weight of the water-based rheological additive is 0.2-0.7% of that of the elastic water-based resin liquid.
Further, in the step of dipping the carbon fiber fabric into the resin slurry, the temperature of the resin slurry is 35-50 ℃, and the dipping time is 5-15 min.
The invention provides a carbon fiber composite decorative film, which comprises a carbon fiber fabric, an elastic water-based resin film and a coloring pigment; the carbon fiber fabric is formed by weaving carbon fibers; the elastic water-based resin film is coated on the surface of the carbon fiber fabric; the coloring pigment is dispersed in the elastic water-based resin film, and is selected from nano transparent pigment and/or micro-nano temperature-sensitive color-changing pigment. The invention utilizes the high color rendering property of the nano transparent pigment and the micro-nano temperature-sensitive color-changing pigment, particularly the high transparency and the high color rendering property of the nano transparent pigment, takes the elastic water-based resin as the adhesive, and organically combines the carbon fiber fabric, the elastic water-based resin film and the two coloring pigments, thereby not only keeping the high-brightness three-dimensional texture of the carbon fiber fabric to the maximum extent, but also endowing the carbon fiber fabric with a certain degree of color hue, and realizing the compatibility of the high-brightness carbon fiber texture and the color. Meanwhile, the elastic water-based resin is adopted, the resin can be directly prepared into resin slurry with coloring pigment in the preparation process, the resin slurry is wrapped on the surface of the carbon fiber fabric in an impregnation mode, the processing procedure is greatly simplified, the formed carbon fiber composite decorative film has the advantages of small thickness, large elasticity, high product brightness and the like, the carbon fiber composite decorative film can be directly used by cutting and attaching, high-temperature curing, high-temperature mould pressing, no organic solvent and the like are not needed in the manufacturing process, and the preparation method has the characteristics of low energy consumption and environmental protection.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
As described in the background section, the carbon fiber decorative film products in the prior art have the problems of difficult coloring, complex processing procedure, etc.
In order to solve the above problems, the present invention provides a carbon fiber composite decorative film comprising a carbon fiber fabric, an elastic water-based resin film and a coloring pigment, the carbon fiber fabric being woven from carbon fibers; the elastic water-based resin film is coated on the surface of the carbon fiber fabric; the coloring pigment is dispersed in the elastic water-based resin film, and is selected from nano transparent pigment and/or micro-nano temperature-sensitive color-changing pigment.
The invention utilizes the high color rendering property of the nano transparent pigment and the micro-nano temperature-sensitive color-changing pigment, particularly the high transparency and the high color rendering property of the nano transparent pigment, takes the elastic water-based resin as the adhesive, and organically combines the carbon fiber fabric, the elastic water-based resin film and the two coloring pigments, thereby not only keeping the high-brightness three-dimensional texture of the carbon fiber fabric to the maximum extent, but also endowing the carbon fiber fabric with a certain degree of color hue, and realizing the compatibility of the high-brightness carbon fiber texture and the color. Meanwhile, the elastic water-based resin is adopted, the resin slurry can be directly prepared from the elastic water-based resin and a coloring pigment in the preparation process, and the resin slurry is wrapped on the surface of the carbon fiber fabric in an impregnation mode, so that the processing procedure is greatly simplified, and the formed carbon fiber composite decorative film has the advantages of small thickness (about 0.3-0.6 mm), large elasticity (the elongation at break can reach 150%, the film is not broken by pulling), high product brightness and the like, can be directly used by cutting and pasting, does not need high-temperature curing, high-temperature die pressing, organic solvent or the like in the manufacturing process, and has the characteristics of low energy consumption and environmental protection.
When the coloring pigment is a nano transparent pigment, the coloring pigment has stronger color development capability, weak forward scattering capability to visible light, high light transmittance, high weather resistance and high color fastness, and the particle size of the nano transparent pigment is preferably less than 50 nm; when the coloring pigment adopts the micro-nano temperature-sensitive color-changing pigment, the color-changing temperature can be adjusted according to the requirement, and the dynamic color-changing effect is realized.
The carbon fiber fabric may be woven in a manner commonly used in the art, for example, a cloth woven by carbon fiber tows.
In a preferred embodiment, the raw material of the elastic water-based resin film includes an elastic aqueous resin liquid including one or more of an aqueous aliphatic polyurethane liquid, an aqueous epoxy resin liquid, an aqueous polyurea-modified polyurethane liquid, an aqueous polycarbonate-modified polyurethane liquid, and a crosslinking agent. For example, the elastic aqueous resin liquid is one or more of anionic aqueous polyurethane resin AH-1618, aliphatic polyether PUD-1201, aliphatic polyester polyether PUD-805H, aliphatic modified polycarbonate PUD-992F and acrylic emulsion JW 800. Preferably, the crosslinker is a water dispersible isocyanate such as EC606, EC602, and the like. By adopting the water-based resin liquid, the elasticity and transparency of the cured resin film layer are high, the elongation at break of the film is more than 300%, the transparency of the cured resin film is more than 95%, and the carbon fiber composite decorative film formed by impregnation can have better elasticity and transparency. Meanwhile, the aqueous resin liquids are aqueous dispersions which can be cured at room temperature without high-temperature baking or high-temperature high-pressure die pressing. In addition, the dispersion of the coloring pigment therein is better, so that the final decorative film has higher brightness and better color rendering property. More preferably, the elastic aqueous resin liquid includes an aqueous aliphatic polyurethane liquid.
In order to make the interfacial bonding force between the carbon fiber fabric and the elastic water-based resin film stronger, the carbon fibers are more sufficiently anchored by the resin, so that the peeling damage of the decorative film during the tensile deformation process is less, in a preferred embodiment, the raw material of the elastic water-based resin film further comprises an aqueous sizing agent, and the aqueous sizing agent comprises one or more of a film-forming resin, a wetting agent and a coupling agent. Preferably, the film-forming resin is selected from one or more of waterborne epoxy resin, waterborne polyurethane and polyvinylidene fluoride; the wetting agent is selected from one or more of TEGO250, Levelol W-469, GS-2227 and L77; the coupling agent is selected from one or more of KH550, KH792, GE A-1122 and KBM-603.
In a preferred embodiment, the raw material of the elastic water-based resin film further includes an aqueous rheological aid. The elastic water-based resin film has better leveling property by adding the aqueous rheological additive, and can be coated on the surface of the carbon fiber fabric more uniformly. More preferably, the aqueous rheology aid is selected from one or more of WT125, GS-1703, BYK-420, TEGO 100.
For the purpose of comprehensively considering the properties of the decorative film in terms of color, brightness, elasticity and the like, in a preferred embodiment, the coloring pigment is 0.22-2.7% of the dry weight of the elastic water-based resin film. More preferably, the nano transparent pigment is selected from one or more of water-dispersible phthalocyanine green, water-dispersible phthalocyanine blue, water-dispersible Turnbull blue, water-soluble JNL-401 blue and SWN-W-60231; the micro-nano temperature-sensitive color-changing pigment is selected from one or more of 313C sky blue, 238C rose red, Green C grass Green, H16 Green and H50 pink, and the color-changing temperature of the micro-nano temperature-sensitive color-changing pigment is-15-70 ℃. In the actual preparation process, the nano transparent pigment is preferably selected from water-borne phthalocyanine series pigments. The micro-nano thermochromic pigment is a microcapsule-coated thermochromic pigment, and the formula can be adjusted according to needs to realize two-stage or multi-stage color change.
According to another aspect of the present invention, there is also provided a method for preparing a carbon fiber composite decorative film, comprising the steps of: mixing elastic water-based resin liquid, a cross-linking agent and a coloring pigment to form resin slurry; and (3) soaking the carbon fiber fabric into the resin slurry, taking out and curing to obtain the carbon fiber composite decorative film.
In the preparation method, the high color rendering properties of the nano transparent pigment and the micro-nano temperature-sensitive color-changing pigment, particularly the high transparency and the high color rendering properties of the nano transparent pigment, are utilized, the elastic water-based resin is used as a binder, and the carbon fiber fabric, the elastic water-based resin film and the two coloring pigments are organically combined, so that the high-brightness three-dimensional texture of the carbon fiber fabric is retained to the maximum extent, the color hue of the carbon fiber fabric is endowed to a certain degree, and the compatibility of the high-brightness carbon fiber texture and the color is realized. Meanwhile, the elastic water-based resin and the coloring pigment are prepared into resin slurry, and the resin slurry is wrapped on the surface of the carbon fiber fabric in an impregnation mode, so that the processing procedure is greatly simplified, the formed carbon fiber composite decorative film has the advantages of small thickness (about 0.3-0.6 mm), large elasticity (elongation at break can reach 150%, no tensile failure), high product brightness and the like, can be directly used by cutting and pasting, does not need high-temperature curing, high-temperature die pressing, organic solvent and the like in the manufacturing process, and has the characteristics of low energy consumption and environmental protection.
In order to make the interfacial bonding force between the carbon fiber fabric and the elastic water-based resin film stronger, the carbon fibers are anchored more sufficiently by the resin, so that the decorative film has less peeling damage during tensile deformation, in a preferred embodiment, the resin slurry further comprises an aqueous sizing agent, and the step of formulating the resin slurry comprises: mixing the elastic water-based resin liquid and the water-based sizing agent, and dispersing under a stirring state to obtain a first dispersion liquid; adding a coloring pigment into the first dispersion liquid, and dispersing under stirring to obtain a second dispersion liquid; adding water into the second dispersion to obtain a third dispersion; standing the third dispersion liquid in a sealed state to obtain slurry to be coated; and adding a cross-linking agent into the slurry to be coated to form resin slurry.
During the mixing process, better dispersion can be formed among the components through the stirring effect. The specific stirring and dispersing conditions of each step can be selected, and preferably, after the elastic water-based resin liquid and the aqueous sizing agent are mixed, the mixture is dispersed for more than 20min at 300-500 rpm by using a stirrer to form a first dispersion liquid; adding a coloring pigment into the first dispersion liquid, and dispersing for more than 30min at 300-500 rpm by using a stirrer to form a second dispersion liquid; and adding water into the second dispersion, and dispersing for more than 20min at 150-300 rpm by using a stirrer to obtain a third dispersion.
The third dispersion liquid prepared in advance is kept stand in a sealed state, so that the solvent can be prevented from volatilizing, dust particles and the like can be prevented from falling into the slurry. For example, the third dispersion may be left standing in a sealed state for 6 hours or more to obtain a slurry to be coated. For the crosslinking agent, the slurry to be coated can be added immediately before dipping, and then the mixture is stirred and mixed uniformly at a low speed.
For the purpose of comprehensively considering the properties of the decorative film in terms of color, brightness, elasticity and the like, in a preferred embodiment, the weight of the aqueous sizing agent is 2-8.5% of the weight of the elastic water-based resin liquid, the weight of the coloring pigment is 1-5% of the weight of the elastic water-based resin liquid, the weight of the water is 4.4-17% of the weight of the elastic water-based resin liquid, and the weight of the crosslinking agent is 2.4-3.5% of the weight of the elastic water-based resin liquid. For the coloring pigment, the temperature-sensitive color-changing pigment can be directly added in the form of water-based temperature-sensitive color-changing powder, and the nano transparent pigment can be added in the form of color paste, such as water-based phthalocyanine green color paste, water-based Tengtze blue color paste and the like. According to the characteristics of the fineness, the color saturation and the like of the pigment, the pigment generally accounts for less than 1 percent of the total formula, more preferably accounts for about 0.44 percent of the weight of the elastic water-based resin liquid for blue color paste, and more preferably accounts for about 0.67 percent of the weight of the elastic water-based resin liquid for green color paste.
Preferably, the elastic water-based resin liquid has a mass concentration of 30 to 70%, the coloring pigment has a mass concentration of 10 to 22%, and the aqueous sizing agent has a mass concentration of 2 to 30%.
In a preferred embodiment, after adding the cross-linking agent to the slurry to be coated, the step of formulating the resin slurry further comprises: and further adding a water-based rheological additive into the slurry to be coated to form resin slurry. The elastic water-based resin film has better leveling property by adding the aqueous rheological additive, and can be coated on the surface of the carbon fiber fabric more uniformly. Preferably, the weight of the aqueous rheological additive is 0.2-0.7% of the weight of the elastic water-based resin liquid. In a specific implementation process, the slurry can be uniformly stirred after the aqueous rheological additive is added. To make the impregnation process more stable and the coating of the fibre surface more uniform, it is preferred that the resin slurry has a viscosity of 20 + -3 s (viscosity cup test).
In order to stabilize the impregnation process, in a preferred embodiment, the step of impregnating the carbon fiber fabric by immersing the carbon fiber fabric into the resin slurry is performed at a temperature of 35 to 50 ℃ for 5 to 15 min. In the specific operation process, the numerical value slurry can be placed in a constant temperature liquid tank, after the temperature is stable, the carbon fiber fabric cut in advance is immersed in the slurry, taken out after 5-15 min, and hung up to room temperature for curing. The temperature of the resin slurry is preferably 45 ℃.
In a word, the resin system in the production process of the carbon fiber fabric prepreg is improved, the original thermosetting resin is changed into the elastic water-based resin, the coating and forming integration is realized, the improved product is the colorful flexible carbon fiber fabric, and different color surface effects can be presented according to the colors of the coloring pigments added in the elastic water-based resin liquid and the types of the temperature-sensing and photosensitive color-changing powder (micro-nano capsule powder), so that the composite functions of appearance color change and temperature detection are realized. The decorative film prepared by the method is thin and can reach 0.3-0.6 mm, the elasticity is high, the elongation at break can reach 150% (without breaking), and the decorative film has the characteristics of light weight, high elasticity, high appearance adaptability and the like. In addition, the resin is used as a water-based normal-temperature curing system, and high temperature, high pressure and organic solvent are not involved in the curing and forming process, so that the method is safe and environment-friendly, reduces the production cost, and widens the application field of the apparent part of the carbon fiber product.
The present application is described in further detail below with reference to specific examples, which should not be construed as limiting the scope of the invention as claimed.
Example 1
The preparation method of the color single-layer carbon fiber fabric comprises the following steps:
1. taking 90 parts of aqueous elastic resin liquid, adding 2 parts of fiber aqueous sizing agent, and dispersing for 20min at 500rpm by using a stirrer until the mixture is uniformly mixed to form first dispersion liquid; wherein the aqueous elastic resin liquid is aliphatic polyester polyether PUD-805H, and the solid content is 35 percent; the aqueous sizing agent comprises film-forming resin, a wetting agent and a coupling agent, wherein the film-forming resin is aqueous polyurethane, the wetting agent is TEGO250, and the coupling agent is KH550, the weight ratio of the film-forming resin to the wetting agent is 1:2:4, and the solid content of the aqueous sizing agent is 10%;
2. adding 0.6 part of aqueous green color paste into the first dispersion liquid, and stirring for 30min at 300rpm by using a stirrer until the color is uniform to form a second dispersion liquid; wherein the water-based green color paste is water-based phthalocyanine green, the solid content of the water-based green color paste is 20 percent, and the pigment granularity of the water-based green color paste is 50 nm;
3. adding 4.2 parts of deionized water into the second dispersion liquid, and stirring for 20min at 150rpm by using a stirrer until the mixture is uniformly mixed to form a third dispersion liquid;
4. sealing the third dispersion liquid, and standing for 6h to form slurry to be coated;
5. adding 3 parts of water-dispersible isocyanate crosslinking agent EC606 into the slurry to be coated, and stirring at 100rpm for 20min for uniformly mixing;
6. adding 0.2 part of water-based rheological additive BYK-420 before use, uniformly stirring, and measuring the viscosity to be 20 +/-3 s to form resin slurry;
7. pouring the prepared resin slurry into a constant-temperature liquid tank, maintaining the temperature at 45 ℃, immersing the carbon fiber fabric cut in advance into the slurry, taking out after 15min, and hanging up to room temperature for curing;
8. and testing the thickness, color, tensile elasticity and the like of the cured fabric.
The carbon fiber composite decorative film prepared by the embodiment has uniform surface, bright green color, thickness of 0.41 +/-0.05 mm and surface density of 458g per square meter; a spectrocolorimeter is adopted to test the surface color parameters of the sample to be L (32.05), a (-11.03) and b (0.16), the parameters are obviously different from the original colors of the carbon fiber, such as L (37.26), a (-0.14) and b (0.86), the elongation at break is 150% (no breaking), and the sample can be directly cut and applied.
Example 2
The preparation method of the color single-layer carbon fiber fabric comprises the following steps:
1. taking 90 parts of aqueous elastic resin liquid, adding 2 parts of fiber aqueous sizing agent, and dispersing for 20min at 300rpm by using a stirrer until the mixture is uniformly mixed to form first dispersion liquid; wherein the aqueous elastic resin liquid is aliphatic polyether PUD-1201, and the solid content of the aqueous elastic resin liquid is 33%; the aqueous sizing agent comprises film-forming resin, a wetting agent and a coupling agent, wherein the film-forming resin is acrylic emulsion JW800, the wetting agent is GS2227 and the coupling agent is KH550, the weight ratio of the film-forming resin to the wetting agent is 1:2.5:3, and the solid content of the aqueous sizing agent is 10%;
2. adding 0.4 part of water-based blue color paste into the first dispersion liquid, and stirring for 30min at 300rpm by using a stirrer until the color is uniform to form a second dispersion liquid; wherein the water-based blue color paste is water-based Turnbull's blue, the solid content is 25 percent, and the pigment granularity is 50 nm;
3. adding 4.4 parts of deionized water into the second dispersion liquid, and stirring for 20min at 150rpm by using a stirrer until the mixture is uniformly mixed to form a third dispersion liquid;
4. sealing the third dispersion liquid, and standing for 6h to form slurry to be coated;
5. adding 3 parts of water-dispersible isocyanate crosslinking agent EC606 into the slurry to be coated, and stirring at 100rpm for 20min for uniformly mixing;
6. adding 0.2 part of water-based rheological additive BYK-420 before use, uniformly stirring, and measuring the viscosity to be 20 +/-3 s to form resin slurry;
7. pouring the prepared resin slurry into a constant-temperature liquid tank, maintaining the temperature at 50 ℃, immersing the carbon fiber fabric cut in advance into the slurry, taking out after 15min, and hanging up to room temperature for curing;
8. and testing the thickness, color, tensile elasticity and the like of the cured fabric.
The carbon fiber composite decorative film prepared in the embodiment has a uniform surface, is bright and light blue, has a thickness of 0.3 +/-0.05 mm, has an area density of 360 g/square meter, has a color L (30.15), a (-3.73) and b (-4.37), is remarkably different from the primary color L (37.26), a (-0.14) and b (0.86) of carbon fiber, has an elongation at break of 200% (not pulled apart), and can be directly cut for application.
Example 3
The preparation method of the color single-layer carbon fiber fabric comprises the following steps:
1. taking 90 parts of aqueous elastic resin liquid, adding 2 parts of fiber aqueous sizing agent, and dispersing for 20min at 400rpm by using a stirrer until the mixture is uniformly mixed to form first dispersion liquid; wherein the aqueous elastic resin liquid is aliphatic modified polycarbonate PUD-992F, and the solid content is 33%; the aqueous sizing agent comprises film-forming resin, a wetting agent and a coupling agent, wherein the film-forming resin is waterborne polyurethane PUD986F, the wetting agent is GS2227 and the coupling agent is KH792, the weight ratio of the film-forming resin to the wetting agent is 1:1.5:2, and the solid content of the aqueous sizing agent is 12%;
2. adding 0.8 part of thermochromic powder into the first dispersion, and stirring for 30min at 300rpm by using a stirrer until the color is uniform to form a second dispersion; wherein the temperature-sensitive color-changing powder has a color-changing temperature of 30 ℃, a grass green color and a particle size of 500 nm;
3. adding 4 parts of deionized water into the second dispersion liquid, and stirring for 20min at 150rpm by using a stirrer until the deionized water is uniformly mixed to form a third dispersion liquid;
4. sealing the third dispersion liquid, and standing for 6h to form slurry to be coated;
5. adding 3 parts of water-dispersible isocyanate cross-linking agent EC602 into the slurry to be coated, and stirring at 100rpm for 20min for uniformly mixing;
6. adding 0.2 part of water rheological additive GS-1703 before use, uniformly stirring, and measuring the viscosity to be 20 +/-3 s to form resin slurry;
7. pouring the prepared resin slurry into a constant-temperature liquid tank, maintaining the temperature at 40 ℃, immersing the carbon fiber fabric cut in advance into the slurry, taking out after 15min, and hanging up to room temperature for curing;
8. and testing the thickness, color, tensile elasticity and the like of the cured fabric.
The carbon fiber composite decorative film prepared by the embodiment has a uniform surface, the thickness is 0.42 +/-0.06 mm, the area density is 500 g/square meter, a brilliant grass green surface is presented under the background of black carbon fiber textures at the temperature of below 31 ℃, and a high-gloss black carbon fiber texture surface is presented when the temperature is raised to above 31 ℃. Elongation at break 150% (not snapped) and can be directly used for cutting.
Example 4
The preparation method of the color single-layer carbon fiber fabric comprises the following steps:
1. taking 85 parts of aqueous elastic resin liquid, adding 7 parts of fiber aqueous sizing agent, and dispersing for 20min at 400rpm by using a stirrer until the mixture is uniformly mixed to form a first dispersion liquid; wherein the aqueous elastic resin liquid is acrylic emulsion JW800 with solid content of 55%; the aqueous sizing agent comprises film-forming resin, a wetting agent and a coupling agent, wherein the film-forming resin is waterborne polyurethane PUD986F, the wetting agent is GS2227 and the coupling agent is KH792, the weight ratio of the film-forming resin to the wetting agent is 1:2:2, and the solid content of the aqueous sizing agent is 25%;
2. adding 0.8 part of JNL-401 blue pigment into the first dispersion liquid, and stirring for 30min at 300rpm by using a stirrer until the color is uniform to form a second dispersion liquid; the color is lake blue, and the granularity is 50 nm;
3. adding 4 parts of deionized water into the second dispersion liquid, and stirring for 20min at 150rpm by using a stirrer until the deionized water is uniformly mixed to form a third dispersion liquid;
4. sealing the third dispersion liquid, and standing for 6h to form slurry to be coated;
5. adding 3 parts of water-dispersible isocyanate cross-linking agent EC602 into the slurry to be coated, and stirring at 100rpm for 20min for uniformly mixing;
6. adding 0.2 part of water rheological additive GS-1703 before use, stirring uniformly, and measuring the viscosity to be 20 +/-3 s to form resin slurry;
7. pouring the prepared resin slurry into a constant-temperature liquid tank, maintaining the temperature at 40 ℃, immersing the carbon fiber fabric cut in advance into the slurry, taking out after 15min, and hanging up to room temperature for curing;
8. and testing the thickness, color, tensile elasticity and the like of the cured fabric.
The carbon fiber composite decorative film prepared in the embodiment has a uniform surface, the thickness is 0.40 +/-0.06 mm, the area density is 500 g/square meter, and a light lake blue surface is presented under the background of black carbon fiber texture at the temperature of below 31 ℃. Elongation at break of 100% (not broken), can be directly used for cutting.
Example 5
The preparation method of the color single-layer carbon fiber fabric comprises the following steps:
1. taking 82 parts of aqueous elastic resin liquid, and dispersing for 20min at 400rpm by using a stirrer until the aqueous elastic resin liquid is uniformly mixed to form a first dispersion liquid; wherein the aqueous elastic resin liquid is aliphatic modified polycarbonate PUD-992F, and the solid content is 33%;
2. adding 1.2 parts of photochromic powder into the first dispersion liquid, and stirring for 30min at 300rpm by using a stirrer until the color is uniform to form a second dispersion liquid; wherein the photochromic powder is grey white indoors, the outdoor sunlight shows yellow, and the granularity of the pigment is about 700 nm;
3. adding 14 parts of deionized water into the second dispersion liquid, and stirring for 20min at 150rpm by using a stirrer until the deionized water is uniformly mixed to form a third dispersion liquid;
4. sealing the third dispersion liquid, and standing for 6h to form slurry to be coated;
5. adding 2 parts of water-dispersible isocyanate cross-linking agent EC602 into the slurry to be coated, and stirring at 100rpm for 20min for uniformly mixing;
6. adding 0.6 part of water-based rheological additive BYK-420 before use, uniformly stirring, and measuring the viscosity to be 20 +/-3 s to form resin slurry;
7. pouring the prepared resin slurry into a constant-temperature liquid tank, maintaining the temperature at 40 ℃, immersing the carbon fiber fabric cut in advance into the slurry, taking out after 15min, and hanging up to room temperature for curing;
8. and testing the thickness, color, tensile elasticity and the like of the cured fabric.
The carbon fiber composite decorative film prepared in the embodiment has a uniform surface, a thickness of 0.38 +/-0.05 mm and an area density of 470g per square meter, a sample in a room is a black carbon fiber texture, and a yellow effect with the black carbon fiber texture as a base is realized in the sun. Elongation at break 150% (not broken) and can be directly used for cutting.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A carbon fiber composite decorative film, characterized in that, carbon fiber composite decorative film includes:
the carbon fiber fabric is formed by weaving carbon fibers;
the elastic water-based resin film is coated on the surface of the carbon fiber fabric;
a coloring pigment dispersed in the elastic water-based resin film, and the coloring pigment is selected from a nano transparent pigment and/or a micro-nano thermochromic pigment.
2. The carbon fiber composite decorative film according to claim 1, wherein the raw material of the elastic water-based resin film comprises an elastic aqueous resin liquid and a crosslinking agent, the elastic aqueous resin liquid comprises one or more of an aqueous aliphatic polyurethane liquid, an aqueous epoxy resin liquid, an aqueous polyurea modified polyurethane liquid and an aqueous polycarbonate modified polyurethane liquid, and the crosslinking agent is water-dispersible isocyanate.
3. The carbon fiber composite decorative film according to claim 2, wherein the raw material of the elastic water-based resin film further comprises an aqueous sizing agent, the aqueous sizing agent comprises one or more of a film-forming resin, a wetting agent and a coupling agent, and the film-forming resin is selected from one or more of an aqueous epoxy resin, an aqueous polyurethane and an aqueous polyvinylidene fluoride; the wetting agent is selected from one or more of TEGO250, Levelol W-469, GS-2227 and L77; the coupling agent is selected from one or more of KH550, KH792, GE A-1122 and KBM-603.
4. The carbon fiber composite decorative film according to claim 3, wherein the raw material of the elastic water-based resin film further comprises an aqueous rheological additive selected from one or more of WT125, GS-1703, BYK-420 and TEGO 100.
5. The carbon fiber composite decorative film according to any one of claims 1 to 4, wherein the coloring pigment is 0.33-2.7% of the dry weight of the elastic water-based resin film, and the nano transparent pigment is selected from one or more of water-dispersible phthalocyanine green, water-dispersible phthalocyanine blue, water-dispersible Turnbull blue, water-based JNL-401 blue, and SWN-W-60231; the micro-nano temperature-sensitive color-changing pigment is selected from one or more of 313C sky blue, 238C rose red, Green C grass Green, H16 Green and H50 peach red, and the color-changing temperature of the micro-nano temperature-sensitive color-changing pigment is-15-70 ℃.
6. A method for preparing the carbon fiber composite decorative film according to any one of claims 1 to 5, comprising the steps of:
mixing elastic water-based resin liquid, a cross-linking agent and a coloring pigment to form resin slurry;
and (3) soaking the carbon fiber fabric into the resin slurry, taking out and curing to obtain the carbon fiber composite decorative film.
7. The method of manufacturing a carbon fiber composite decorative film according to claim 6, wherein the resin slurry further comprises an aqueous sizing agent, and the step of preparing the resin slurry comprises:
mixing the elastic water-based resin liquid and the aqueous sizing agent, and dispersing under stirring to obtain a first dispersion liquid;
adding the coloring pigment into the first dispersion liquid, and dispersing under stirring to obtain a second dispersion liquid;
adding water into the second dispersion to obtain a third dispersion;
standing the third dispersion liquid in a sealed state to obtain slurry to be coated;
and adding a cross-linking agent into the slurry to be coated to form the resin slurry.
8. The method for preparing the carbon fiber composite decorative film according to claim 7, wherein the weight of the aqueous sizing agent is 2 to 8.5% of the weight of the elastic water-based resin liquid, the weight of the coloring pigment is 1 to 5% of the weight of the elastic water-based resin liquid, the weight of the water is 4.4 to 17% of the weight of the elastic water-based resin liquid, and the weight of the crosslinking agent is 2.4 to 3.5% of the weight of the elastic water-based resin liquid.
9. The method for producing a carbon fiber composite decorative film according to claim 7 or 8, wherein the step of preparing the resin slurry after adding the crosslinking agent to the slurry to be coated further comprises: and further adding a water-based rheological additive into the slurry to be coated to form the resin slurry, wherein the weight of the water-based rheological additive is 0.2-0.7% of the weight of the elastic water-based resin liquid.
10. The method for preparing the carbon fiber composite decorative film according to any one of claims 6 to 8, wherein in the step of immersing the carbon fiber fabric into the resin slurry, the temperature of the resin slurry is 35 to 50 ℃, and the immersion time is 5 to 15 min.
CN202011290876.6A 2020-11-17 2020-11-17 Carbon fiber composite decorative film and preparation method thereof Pending CN114507990A (en)

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CN107760191A (en) * 2017-09-29 2018-03-06 东来涂料技术(上海)有限公司 A kind of waterborne conductive priming paint applied to automobile carbon fiber and preparation method thereof
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