CN114987024B - Composite board mobile phone cover with textures and production process thereof - Google Patents

Composite board mobile phone cover with textures and production process thereof Download PDF

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Publication number
CN114987024B
CN114987024B CN202210536606.1A CN202210536606A CN114987024B CN 114987024 B CN114987024 B CN 114987024B CN 202210536606 A CN202210536606 A CN 202210536606A CN 114987024 B CN114987024 B CN 114987024B
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fiber cloth
phone cover
silicon dioxide
mobile phone
glass fiber
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CN114987024A (en
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张宗权
何辉春
王碧武
陈建
陈欢
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Guangdong Zongsheng New Materials Co.,Ltd.
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Huizhou Zongsheng Electronic Material Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
    • D06M11/74—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/77—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof
    • D06M11/79—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof with silicon dioxide, silicic acids or their salts
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/50—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with organometallic compounds; with organic compounds containing boron, silicon, selenium or tellurium atoms
    • D06M13/51—Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond
    • D06M13/513—Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond with at least one carbon-silicon bond
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M14/00—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/14—Glass
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/02—Ingredients treated with inorganic substances
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Reinforced Plastic Materials (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

The application discloses a composite board mobile phone cover with texture and a production process thereof, wherein glue solution is coated on two sides of continuous glass fiber cloth, then the two sides are solidified to form prepregs, then a plurality of prepregs are stacked in turn from top to bottom, a texture film can be placed on the uppermost layer during actual processing, the texture film is formed by contacting a PET bottom layer (PET release paper) and a UV glue layer containing texture patterns, the UV glue layer is in thermal pressing compounding with the uppermost prepreg during placement, a mobile phone cover plate with the texture film is formed, the PET bottom layer (PET release paper) above the mobile phone cover plate is torn off, the UV glue layer containing the texture patterns is transferred to the upper surface of the mobile phone cover plate, so that the texture patterns are formed on the surface of the mobile phone cover plate, the texture patterns are not easy to fall off, and the practicability is more excellent. The prepared composite mobile phone cover plate has excellent strength and mechanical properties, excellent surface water resistance and moisture resistance, excellent high temperature resistance and high practicability.

Description

Composite board mobile phone cover with textures and production process thereof
Technical Field
The application relates to the technical field of mobile phone cover plates, in particular to a composite board mobile phone cover with textures and a production process thereof.
Background
Glass fiber is an inorganic nonmetallic material with excellent performance, and has the advantages of good insulativity, strong heat resistance, good corrosion resistance and high mechanical strength, but has the disadvantages of brittle property and poor wear resistance. Glass fibers are commonly used as reinforcing materials in composite materials and are widely used in various fields. At present, with the rapid development of electronic products, the requirements of consumers on the performance of the mobile phone cover plate are higher and higher, and the requirements on the surface patterns and the decoration attractiveness of the mobile phone cover plate are higher, so that on the basis, the improvement of the strength and the high temperature resistance of the mobile phone cover plate is the main content of research and development.
Therefore, based on the above situation, the application discloses a textured composite board mobile phone cover and a production process thereof, so as to prepare and obtain a high-strength cover board material.
Disclosure of Invention
The application aims to provide a composite board mobile phone cover with textures and a production process thereof, which are used for solving the problems in the background technology.
In order to solve the technical problems, the application provides the following technical scheme:
a production process of a composite board mobile phone cover with textures comprises the following steps:
(1) Mixing graphene oxide with deionized water, stirring for 20-30 min, and performing ultrasonic dispersion for 1-1.5 h to obtain graphene dispersion liquid;
mixing a silane coupling agent A with ethanol to obtain a mixed solution; taking silicon dioxide and deionized water, ultrasonically stirring for 20-30 min, adding the mixed solution at 50-60 ℃, carrying out heat preservation reaction for 1-1.5 h, then heating to 70-80 ℃, and carrying out heat preservation treatment for 2-2.5 h to obtain silicon dioxide dispersion liquid; the silane coupling agent A is KH-550 and KH-560 mixed;
(2) Soaking the continuous glass fiber cloth into the graphene dispersion liquid for 10-20 min, and taking out for vacuum drying; soaking the mixture in a silicon dioxide dispersion liquid, standing the mixture for 15 to 20 minutes, regulating the pH of the silicon dioxide dispersion liquid to 8 to 9, heating the mixture to 65 to 75 ℃, carrying out heat preservation reaction for 2 to 3 hours, adding gamma-mercaptopropyl trimethoxy silane, continuously stirring the mixture for 20 to 30 minutes, taking out the mixture, and carrying out vacuum drying to obtain graphene oxide-silicon dioxide loaded fiber cloth;
mixing an epoxy monomer containing allyl with toluene to obtain an epoxy monomer solution; soaking fiber cloth loaded with graphene oxide-silicon dioxide into an epoxy monomer solution, stirring and reacting for 30-40 min under a nitrogen environment, wherein the reaction temperature is 85-90 ℃, adding azodiisobutyronitrile, continuously reacting for 10-12 h, taking out after the reaction, washing and drying to obtain modified glass fiber cloth;
(3) Mixing epoxy resin and an allyl-containing epoxy monomer, adding a curing agent, and uniformly mixing to obtain a glue solution; coating glue solution on two sides of the modified glass fiber cloth, and curing to form prepreg;
stacking a plurality of layers of prepreg from top to bottom, and placing a texture film on the upper surface, wherein the texture film comprises a PET bottom layer and a UV adhesive layer with texture patterns, the UV adhesive layer is contacted with the prepreg, and the PET bottom layer is removed by hot-pressing and compounding to obtain the mobile phone cover with texture.
More preferably, the preparation method of the epoxy monomer containing allyl comprises the following steps:
s1: dissolving diphenol monomer with absolute ethyl alcohol, adding absolute potassium carbonate, heating to 80-85 ℃, stirring and reacting for 1-1.5 h, slowly dripping allyl bromide during the reaction, continuing the reaction for 6-8 h, collecting the product after the reaction, washing the product sequentially with absolute ethyl alcohol and deionized water, vacuum drying, heating to 170-180 ℃ under nitrogen atmosphere, carrying out heat preservation treatment for 20-30 min, continuously heating to 210-215 ℃, carrying out heat preservation and reacting for 1.5-2 h, and obtaining monomer containing allyl; the diphenol monomers include 3-fluorobiphenyl-4, 4 '-diphenol, 4' -amino-4-diphenol and biphenol;
s2: mixing and stirring allyl-containing monomer, epichlorohydrin, benzyl triethyl ammonium chloride and dioxane for 20-30 min, heating to 90-95 ℃, stirring and reacting for 4-5 h, collecting a product after the reaction, mixing the product with toluene, dropwise adding sodium hydroxide solution at 85-90 ℃ for continuous reaction for 4-5 h, washing with deionized water after the reaction, and vacuum drying to obtain the allyl-containing epoxy monomer.
In a more optimized scheme, in the step S1, the molar ratio of the 3-fluorobiphenyl-4, 4 '-biphenol, the 4' -amino-4-biphenol and the biphenol is 1:1:1, a step of; the molar ratio of the diphenol monomer to the anhydrous potassium carbonate to the allyl bromide is 1: (2.5-3): (4-5).
In a more optimized scheme, in the step S2, the molar ratio of the monomer containing allyl, the epoxy chloropropane and the benzyl triethyl ammonium chloride is 1:4:0.5.
in a more optimized scheme, in the step (1), the molar ratio of KH-550 to KH-560 is 3:1, a step of; the mass ratio of the silicon dioxide to the silane coupling agent A is 10:1, wherein the mol ratio of KH-550 to gamma-mercaptopropyl trimethoxysilane is 1:3.
in the more optimized scheme, in the step (2), the continuous glass fiber cloth is pretreated, and the specific steps are as follows: taking a silane coupling agent B, absolute ethyl alcohol and deionized water, and performing ultrasonic dispersion for 20-30 min to obtain a silane coupling agent solution; soaking the continuous glass fiber cloth into a silane coupling agent solution for 20-30 min, taking out, and vacuum drying to obtain the pretreated continuous glass fiber cloth.
In a more optimized scheme, the silane coupling agent B is KH-843.
In a more optimized scheme, the mass ratio of the epoxy resin to the allyl-containing epoxy monomer to the curing agent is 5:1:1.5; the curing agent is polyamide 650.
And the mobile phone cover is prepared according to the production process of the composite plate mobile phone cover with the texture.
Compared with the prior art, the application has the following beneficial effects:
the application discloses a production process of a composite board mobile phone cover with textures, which comprises the steps of coating glue solution on two sides of continuous glass fiber cloth, curing to form prepregs, stacking a plurality of prepregs sequentially from top to bottom, placing a texture film on the uppermost layer during actual processing, enabling the texture film to be formed by contacting a PET bottom layer (PET release paper) and a UV glue layer containing texture patterns, carrying out hot pressing compounding on the UV glue layer and the uppermost prepreg during placing to form a mobile phone cover board with the texture film, tearing off the PET bottom layer (PET release paper) above the mobile phone cover board, and transferring the UV glue layer containing the texture patterns to the upper surface of the mobile phone cover board, so that the texture patterns are formed on the surface of the mobile phone cover board, are not easy to fall off, and the practicality is more excellent. The texture pattern is a cobble pattern or a diamond pattern.
According to the preparation method, the surface of the continuous glass fiber cloth is modified during preparation, the continuous glass fiber is firstly arranged in graphene dispersion liquid, graphene is deposited and impregnated on the surface of the continuous glass fiber cloth, then the continuous glass fiber cloth is placed in silica dispersion liquid treated by a silane coupling agent A to adsorb and deposit silica, so that the glass fiber cloth with the surface loaded with graphene oxide-silica is obtained, graphene oxide and silica are sequentially deposited outwards on the surface of the glass fiber cloth, the graphene oxide and the silica can be used as reinforcing frameworks, and the strength and mechanical properties of the mobile phone cover plate can be greatly improved after the glue solution is solidified.
In this step, the following conditions need to be defined:
(1) The silane coupling agent A introduced into the silicon dioxide dispersion liquid is mixed by KH-550 and KH-560, and the mol ratio of KH-550 to KH-560 is 3:1, a step of; the purpose of this defined parameter is to: because the surface of the graphene oxide is negatively charged, amino groups are introduced to the surface of the silicon dioxide, so that the silicon dioxide can be assembled with the graphene oxide electrostatically, and the silicon dioxide is deposited and impregnated on the surface of the graphene oxide to form a reinforced structure; on the other hand, the introduction of the epoxy group is to improve the compatibility between the subsequent epoxy resin glue solution, the adhesion wettability of the glue solution on the surface of the continuous glass fiber cloth and the crosslinking density of the glue solution, so that the strength and the mechanical property of the mobile phone cover plate are improved.
(2) Soaking the continuous glass fiber cloth into the silicon dioxide dispersion liquid, and adjusting the pH value to 8-9 for reaction; the reason for this parameter adjustment is: at the moment, amino groups and epoxy groups exist on the surface of the silicon dioxide, the amino groups on the surface of the silicon dioxide open the rings of the epoxy groups in an alkaline environment, bridging among silicon dioxide particles is realized, the deposition effect of the silicon dioxide can be improved, the reinforcing effect of the silicon dioxide is improved, and the strength of a finished cover plate is further improved.
(3) After regulating the pH value of the system, adding gamma-mercaptopropyl trimethoxy silane for reaction; the purpose of this step is: the preparation method comprises the following steps of introducing sulfhydryl groups on the surface of the glass fiber loaded with graphene oxide and silicon dioxide, wherein the main creation points are as follows: in the conventional step, gamma-mercaptopropyl trimethoxy silane can be completely added into a silane coupling agent A or a silane coupling agent B to directly pretreat silicon dioxide or continuous glass fiber cloth so as to introduce mercapto groups, but in the scheme, the negative charge of graphene oxide and the electrostatic action of amino silicon dioxide are utilized, so that the addition sequence of the mercapto silane coupling agent is adjusted to be after deposition adsorption to reduce the influence caused by the mercapto groups in order to avoid influencing the electrostatic assembly effect.
On the basis of the scheme, the epoxy monomer containing allyl is grafted on the surface of the glass fiber cloth loaded with graphene oxide-silicon dioxide, and the epoxy monomer is grafted on the surface of the glass fiber cloth through mercapto-alkene click reaction, so that the adhesiveness between the surface of the continuous glass fiber cloth and the epoxy resin glue solution is improved, the epoxy monomer contained on the surface of the continuous glass fiber cloth can participate in the curing of the resin glue solution, the curing and coating effects of the resin glue solution are effectively improved, and the strength of the prepreg is greatly improved.
Meanwhile, the allyl-containing epoxy monomer is prepared by taking a diphenol monomer as a raw material, and the scheme limits that the diphenol monomer comprises 3-fluorobiphenyl-4, 4 '-diphenol, 4' -amino-4-diphenol and diphenol, and the molar ratio is 1:1:1", the epoxy monomer contains fluorine and biphenyl units, the introduction of the biphenyl units can improve the high temperature resistance of the epoxy resin, the introduction of the fluorine can effectively improve the waterproof and moistureproof capacity of the mobile phone cover plate, and meanwhile, the epoxy monomer containing allyl is introduced into an epoxy resin curing system, so that the crosslinking density of glue solution can be improved, and the strength of the mobile phone cover plate is excellently influenced.
According to the scheme, the continuous glass fiber cloth is pretreated, the continuous glass fiber is pretreated by adopting the silane coupling agent KH-843, KH-843 is a double-amino silane coupling agent, and after the continuous glass fiber cloth is pretreated, the deposition of graphene oxide on the surface of the continuous glass fiber cloth can be effectively improved; meanwhile, the introduction of the amino can further improve the adhesion of the continuous glass fiber cloth and the subsequent epoxy glue solution, and the mechanical property of the cured product is improved.
The scheme discloses a production process of a composite board mobile phone cover with textures, which is reasonable in process design and simple to operate, and the prepared composite mobile phone cover plate has excellent strength and mechanical property, and the surface of the composite mobile phone cover plate is excellent in waterproof and moistureproof properties, excellent in high temperature resistance and high in practicability.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In examples 1 to 4 of this embodiment, the specific preparation steps of the allyl-containing epoxy monomer are as follows:
s1: dissolving diphenol monomer in absolute ethyl alcohol, adding absolute potassium carbonate, heating to 80 ℃, stirring and reacting for 1.5 hours, slowly dripping allyl bromide during the reaction, continuing the reaction for 7 hours, collecting a product after the reaction, washing the product sequentially by absolute ethyl alcohol and deionized water, drying in vacuum, heating to 170 ℃ under nitrogen atmosphere, carrying out heat preservation treatment for 30 minutes, continuing heating to 210 ℃, and carrying out heat preservation reaction for 2 hours to obtain monomer containing allyl; the diphenol monomers include 3-fluorobiphenyl-4, 4 '-diphenol, 4' -amino-4-diphenol and biphenol; the molar ratio of the 3-fluorobiphenyl-4, 4 '-diphenol, the 4' -amino-4-diphenol and the biphenol is 1:1:1, a step of; the molar ratio of the diphenol monomer to the anhydrous potassium carbonate to the allyl bromide is 1:2.5:4.
s2: mixing and stirring allyl-containing monomers, epichlorohydrin, benzyl triethyl ammonium chloride and dioxane for 30min, heating to 90 ℃, stirring and reacting for 5h, collecting a product after the reaction, mixing the product with toluene, dropwise adding sodium hydroxide solution at 85 ℃, continuing the reaction for 5h, washing with deionized water after the reaction, and vacuum drying to obtain the allyl-containing epoxy monomer. The molar ratio of the allyl-containing monomer to the epoxy chloropropane to the benzyl triethyl ammonium chloride is 1:4:0.5; the molar ratio of the allyl-containing monomer to sodium hydroxide is 1:2.
the scheme is mainly characterized in that the prepreg is prepared, so that the influence of UV glue is avoided, the detection is convenient in actual preparation, and a texture film can not be adhered; the model of the scheme glass fiber cloth is 2116.
Example 1:
a production process of a composite board mobile phone cover with textures comprises the following steps:
(1) Mixing graphene oxide with deionized water, stirring for 20min, and performing ultrasonic dispersion for 1h to obtain graphene dispersion liquid with the concentration of 4g/L;
mixing a silane coupling agent A with ethanol with equal mass to obtain a mixed solution; the silane coupling agent A is prepared by mixing KH-550 and KH-560, wherein the molar ratio of KH-550 to KH-560 is 3:1.
mixing silicon dioxide and deionized water for 20min by ultrasonic stirring, adding the mixed solution at 50 ℃, reacting for 1.5h by heat preservation, heating to 70 ℃, and performing heat preservation for 2.5h to obtain silicon dioxide dispersion; the mass ratio of the silicon dioxide to the deionized water is 1:50; the mass ratio of the silicon dioxide to the silane coupling agent A is 10:1.
(2) Soaking the continuous glass fiber cloth into graphene dispersion liquid for 10min, and taking out for vacuum drying; drying, soaking in a silicon dioxide dispersion liquid, standing for 15min, regulating the pH of the silicon dioxide dispersion liquid to 8, heating to 65 ℃, preserving heat for 3h, adding gamma-mercaptopropyl trimethoxy silane, continuously stirring for 20min, taking out, and vacuum drying to obtain graphene oxide-silicon dioxide loaded fiber cloth; the bath ratio during soaking is 1:10. the molar ratio of KH-550 to gamma-mercaptopropyl trimethoxysilane is 1:3.
mixing an epoxy monomer containing allyl with toluene to obtain an epoxy monomer solution; the concentration of the epoxy monomer solution is 4g/L; soaking fiber cloth loaded with graphene oxide-silicon dioxide into an epoxy monomer solution, stirring and reacting for 30min under a nitrogen environment, wherein the reaction temperature is 90 ℃, adding azodiisobutyronitrile, continuing to react for 10h, taking out after the reaction, and washing and drying to obtain modified glass fiber cloth; the azodiisobutyronitrile is 1wt% of the epoxy monomer; the mass ratio of the fiber cloth loaded with the graphene oxide-silicon dioxide to the epoxy monomer is 1:8.
(3) Mixing epoxy resin and an allyl-containing epoxy monomer, adding a curing agent, and uniformly mixing to obtain a glue solution; coating glue solution on two sides of the modified glass fiber cloth, and curing to form prepreg; coating amount was 250g/m 2 。
The mass ratio of the epoxy resin to the allyl-containing epoxy monomer to the curing agent is 5:1:1.5; the curing agent is polyamide 650.
And stacking four layers of prepregs from top to bottom, and performing hot pressing and compounding to obtain a finished product.
Example 2:
a production process of a composite board mobile phone cover with textures comprises the following steps:
(1) Mixing graphene oxide with deionized water, stirring for 25min, and performing ultrasonic dispersion for 1.5h to obtain graphene dispersion liquid with the concentration of 4g/L;
mixing a silane coupling agent A with ethanol with equal mass to obtain a mixed solution; the silane coupling agent A is prepared by mixing KH-550 and KH-560, wherein the molar ratio of KH-550 to KH-560 is 3:1.
mixing silicon dioxide and deionized water for 25min by ultrasonic stirring, adding the mixed solution at 55 ℃, reacting for 1.5h by heat preservation, heating to 75 ℃, and performing heat preservation for 2.5h to obtain silicon dioxide dispersion; the mass ratio of the silicon dioxide to the deionized water is 1:50; the mass ratio of the silicon dioxide to the silane coupling agent A is 10:1.
(2) Soaking the continuous glass fiber cloth into graphene dispersion liquid for 15min, and taking out for vacuum drying; drying, soaking in a silicon dioxide dispersion liquid, standing for 18min, regulating the pH of the silicon dioxide dispersion liquid to 9, heating to 70 ℃, carrying out heat preservation reaction for 2.5h, adding gamma-mercaptopropyl trimethoxy silane, continuously stirring for 25min, taking out, and carrying out vacuum drying to obtain graphene oxide-silicon dioxide loaded fiber cloth; the bath ratio during soaking is 1:10. the molar ratio of KH-550 to gamma-mercaptopropyl trimethoxysilane is 1:3.
mixing an epoxy monomer containing allyl with toluene to obtain an epoxy monomer solution; the concentration of the epoxy monomer solution is 4g/L; soaking fiber cloth loaded with graphene oxide-silicon dioxide into an epoxy monomer solution, stirring and reacting for 35min under a nitrogen environment, wherein the reaction temperature is 90 ℃, adding azodiisobutyronitrile, continuing to react for 11h, taking out after the reaction, and washing and drying to obtain modified glass fiber cloth; the azodiisobutyronitrile is 1wt% of the epoxy monomer; the mass ratio of the fiber cloth loaded with the graphene oxide-silicon dioxide to the epoxy monomer is 1:8.
(3) Mixing epoxy resin and an allyl-containing epoxy monomer, adding a curing agent, and uniformly mixing to obtain a glue solution; coating glue solution on two sides of the modified glass fiber cloth, and curing to form prepreg; coating amount was 250g/m 2 。
The mass ratio of the epoxy resin to the allyl-containing epoxy monomer to the curing agent is 5:1:1.5; the curing agent is polyamide 650.
And stacking four layers of prepregs from top to bottom, and performing hot pressing and compounding to obtain a finished product.
Example 3:
a production process of a composite board mobile phone cover with textures comprises the following steps:
(1) Mixing graphene oxide with deionized water, stirring for 30min, and performing ultrasonic dispersion for 1.5h to obtain graphene dispersion liquid with the concentration of 4g/L;
mixing a silane coupling agent A with ethanol with equal mass to obtain a mixed solution; the silane coupling agent A is prepared by mixing KH-550 and KH-560, wherein the molar ratio of KH-550 to KH-560 is 3:1.
mixing silicon dioxide and deionized water for 30min by ultrasonic stirring, adding the mixed solution at 60 ℃, reacting for 1h by heat preservation, heating to 80 ℃, and performing heat preservation treatment for 2h to obtain silicon dioxide dispersion liquid; the mass ratio of the silicon dioxide to the deionized water is 1:50; the mass ratio of the silicon dioxide to the silane coupling agent A is 10:1.
(2) Soaking the continuous glass fiber cloth into graphene dispersion liquid for 20min, and taking out for vacuum drying; drying, soaking in a silicon dioxide dispersion liquid, standing for 20min, regulating the pH of the silicon dioxide dispersion liquid to 9, heating to 75 ℃, preserving heat for 2h, adding gamma-mercaptopropyl trimethoxy silane, continuously stirring for 30min, taking out, and vacuum drying to obtain graphene oxide-silicon dioxide loaded fiber cloth; the bath ratio during soaking is 1:10. the molar ratio of KH-550 to gamma-mercaptopropyl trimethoxysilane is 1:3.
mixing an epoxy monomer containing allyl with toluene to obtain an epoxy monomer solution; the concentration of the epoxy monomer solution is 4g/L; soaking fiber cloth loaded with graphene oxide-silicon dioxide into an epoxy monomer solution, stirring and reacting for 40min under a nitrogen environment, wherein the reaction temperature is 85 ℃, adding azodiisobutyronitrile, continuing to react for 12h, taking out after the reaction, and washing and drying to obtain modified glass fiber cloth; the azodiisobutyronitrile is 1wt% of the epoxy monomer; the mass ratio of the fiber cloth loaded with the graphene oxide-silicon dioxide to the epoxy monomer is 1:8.
(3) Mixing epoxy resin and an allyl-containing epoxy monomer, adding a curing agent, and uniformly mixing to obtain a glue solution; coating glue solution on two sides of the modified glass fiber cloth, and curing to form prepreg; coating amount was 250g/m 2 。
The mass ratio of the epoxy resin to the allyl-containing epoxy monomer to the curing agent is 5:1:1.5; the curing agent is polyamide 650.
And stacking four layers of prepregs from top to bottom, and performing hot pressing and compounding to obtain a finished product.
Example 4: the continuous glass cloth was pretreated on the basis of example 2, the rest of the process being unchanged.
A production process of a composite board mobile phone cover with textures comprises the following steps:
(1) Mixing graphene oxide with deionized water, stirring for 25min, and performing ultrasonic dispersion for 1.5h to obtain graphene dispersion liquid with the concentration of 4g/L;
mixing a silane coupling agent A with ethanol with equal mass to obtain a mixed solution; the silane coupling agent A is prepared by mixing KH-550 and KH-560, wherein the molar ratio of KH-550 to KH-560 is 3:1.
mixing silicon dioxide and deionized water for 25min by ultrasonic stirring, adding the mixed solution at 55 ℃, reacting for 1.5h by heat preservation, heating to 75 ℃, and performing heat preservation for 2.5h to obtain silicon dioxide dispersion; the mass ratio of the silicon dioxide to the deionized water is 1:50; the mass ratio of the silicon dioxide to the silane coupling agent A is 10:1.
(2) Taking a silane coupling agent B, absolute ethyl alcohol and deionized water, and performing ultrasonic dispersion for 25min to obtain a silane coupling agent solution; and soaking the continuous glass fiber cloth into a silane coupling agent solution for 25min, taking out, and vacuum drying to obtain the pretreated continuous glass fiber cloth. The silane coupling agent B is KH-843, and the mass ratio of the silane coupling agent B to the absolute ethyl alcohol to the deionized water is 5:12:2; the bath ratio is 1:10.
soaking the pretreated continuous glass fiber cloth into graphene dispersion liquid for 15min, and taking out for vacuum drying; drying, soaking in a silicon dioxide dispersion liquid, standing for 18min, regulating the pH of the silicon dioxide dispersion liquid to 9, heating to 70 ℃, carrying out heat preservation reaction for 2.5h, adding gamma-mercaptopropyl trimethoxy silane, continuously stirring for 25min, taking out, and carrying out vacuum drying to obtain graphene oxide-silicon dioxide loaded fiber cloth; the bath ratio during soaking is 1:10. the molar ratio of KH-550 to gamma-mercaptopropyl trimethoxysilane is 1:3.
mixing an epoxy monomer containing allyl with toluene to obtain an epoxy monomer solution; the concentration of the epoxy monomer solution is 4g/L; soaking fiber cloth loaded with graphene oxide-silicon dioxide into an epoxy monomer solution, stirring and reacting for 35min under a nitrogen environment, wherein the reaction temperature is 90 ℃, adding azodiisobutyronitrile, continuing to react for 11h, taking out after the reaction, and washing and drying to obtain modified glass fiber cloth; the azodiisobutyronitrile is 1wt% of the epoxy monomer; the mass ratio of the fiber cloth loaded with the graphene oxide-silicon dioxide to the epoxy monomer is 1:8.
(3) Mixing epoxy resin and an allyl-containing epoxy monomer, adding a curing agent, and uniformly mixing to obtain a glue solution; coating glue solution on two sides of the modified glass fiber cloth, and curing to form prepreg; coating amount was 250g/m 2 。
The mass ratio of the epoxy resin to the allyl-containing epoxy monomer to the curing agent is 5:1:1.5; the curing agent is polyamide 650.
And stacking four layers of prepregs from top to bottom, and performing hot pressing and compounding to obtain a finished product.
Comparative example 1: control was performed on the basis of example 4, and in comparative example 1, the allyl-containing epoxy monomer was prepared without adding 4' -amino-4-biphenol.
The specific parameters are as follows: the diphenol monomer comprises 3-fluorobiphenyl-4, 4' -diphenol and diphenol; the molar ratio of the 3-fluorobiphenyl-4, 4' -diphenol to the biphenol is 1:1, a step of; the molar ratio of the diphenol monomer to the anhydrous potassium carbonate to the allyl bromide is 1:2.5:3.
comparative example 2: control was performed on the basis of example 4, and in comparative example 2, the allyl-containing epoxy monomer was prepared without adding 3-fluorobiphenyl-4, 4' -diol.
The specific parameters are as follows: the diphenol monomers include 4' -amino-4-diphenol and diphenol; the molar ratio of the 4' -amino-4-diphenol to the biphenol is 1:1, a step of; the molar ratio of the diphenol monomer to the anhydrous potassium carbonate to the allyl bromide is 1:2.5:3.
comparative example 3: a control was made on the basis of example 4, and in comparative example 3, the molar ratio of KH-550 to KH-560 in the silane coupling agent A was adjusted to 2:1.
comparative example 4: a control was made on the basis of example 4, and in comparative example 4, the molar ratio of KH-550 to KH-560 in the silane coupling agent A was adjusted to 2:1, and defines a molar ratio of KH-550 to gamma-mercaptopropyl trimethoxysilane of 1:1.
comparative example 5: the control was performed based on example 4, and in comparative example 5, KH-550, KH-560 and gamma-mercaptopropyl trimethoxysilane were added together without limiting the order of addition of the silane coupling agent.
A production process of a composite board mobile phone cover with textures comprises the following steps:
(1) Mixing graphene oxide with deionized water, stirring for 25min, and performing ultrasonic dispersion for 1.5h to obtain graphene dispersion liquid with the concentration of 4g/L;
mixing a silane coupling agent A with ethanol with equal mass to obtain a mixed solution; the silane coupling agent A is mixed by KH-550, KH-560 and gamma-mercaptopropyl trimethoxy silane, and the molar ratio of KH-550, KH-560 and gamma-mercaptopropyl trimethoxy silane is 3:1:9.
mixing silicon dioxide and deionized water for 25min by ultrasonic stirring, adding the mixed solution at 55 ℃, reacting for 1.5h by heat preservation, heating to 75 ℃, and performing heat preservation for 2.5h to obtain silicon dioxide dispersion; the mass ratio of the silicon dioxide to the deionized water is 1:50; the mass ratio of the silicon dioxide to the silane coupling agent A is 10:1.
(2) Taking a silane coupling agent B, absolute ethyl alcohol and deionized water, and performing ultrasonic dispersion for 25min to obtain a silane coupling agent solution; and soaking the continuous glass fiber cloth into a silane coupling agent solution for 25min, taking out, and vacuum drying to obtain the pretreated continuous glass fiber cloth. The silane coupling agent B is KH-843, and the mass ratio of the silane coupling agent B to the absolute ethyl alcohol to the deionized water is 5:12:2; the bath ratio is 1:10.
soaking the pretreated continuous glass fiber cloth into graphene dispersion liquid for 15min, and taking out for vacuum drying; drying, soaking in a silicon dioxide dispersion liquid, standing for 18min, regulating the pH of the silicon dioxide dispersion liquid to 9, heating to 70 ℃, carrying out heat preservation reaction for 2.5h, taking out, and then carrying out vacuum drying to obtain graphene oxide-silicon dioxide loaded fiber cloth; the bath ratio during soaking is 1:10.
mixing an epoxy monomer containing allyl with toluene to obtain an epoxy monomer solution; the concentration of the epoxy monomer solution is 4g/L; soaking fiber cloth loaded with graphene oxide-silicon dioxide into an epoxy monomer solution, stirring and reacting for 35min under a nitrogen environment, wherein the reaction temperature is 90 ℃, adding azodiisobutyronitrile, continuing to react for 11h, taking out after the reaction, and washing and drying to obtain modified glass fiber cloth; the azodiisobutyronitrile is 1wt% of the epoxy monomer; the mass ratio of the fiber cloth loaded with the graphene oxide-silicon dioxide to the epoxy monomer is 1:8.
(3) Mixing epoxy resin and an allyl-containing epoxy monomer, adding a curing agent, and uniformly mixing to obtain a glue solution; coating glue solution on two sides of the modified glass fiber cloth, and curing to form prepreg; coating amount was 250g/m 2 。
The mass ratio of the epoxy resin to the allyl-containing epoxy monomer to the curing agent is 5:1:1.5; the curing agent is polyamide 650.
And stacking four layers of prepregs from top to bottom, and performing hot pressing and compounding to obtain a finished product.
Comparative example 6: in comparative example 6, KH-550, KH-560 and gamma-mercaptopropyl trimethoxysilane were added together without limiting the order of addition of the silane coupling agent.
A production process of a composite board mobile phone cover with textures comprises the following steps:
(1) Mixing graphene oxide with deionized water, stirring for 25min, and performing ultrasonic dispersion for 1.5h to obtain graphene dispersion liquid with the concentration of 4g/L;
mixing a silane coupling agent A with ethanol with equal mass to obtain a mixed solution; the silane coupling agent A is mixed by KH-550, KH-560 and gamma-mercaptopropyl trimethoxy silane, and the molar ratio of KH-550, KH-560 and gamma-mercaptopropyl trimethoxy silane is 3:1:2.
mixing silicon dioxide and deionized water for 25min by ultrasonic stirring, adding the mixed solution at 55 ℃, reacting for 1.5h by heat preservation, heating to 75 ℃, and performing heat preservation for 2.5h to obtain silicon dioxide dispersion; the mass ratio of the silicon dioxide to the deionized water is 1:50; the mass ratio of the silicon dioxide to the silane coupling agent A is 10:1.
(2) Taking a silane coupling agent B, absolute ethyl alcohol and deionized water, and performing ultrasonic dispersion for 25min to obtain a silane coupling agent solution; and soaking the continuous glass fiber cloth into a silane coupling agent solution for 25min, taking out, and vacuum drying to obtain the pretreated continuous glass fiber cloth. The silane coupling agent B is KH-843, and the mass ratio of the silane coupling agent B to the absolute ethyl alcohol to the deionized water is 5:12:2; the bath ratio is 1:10.
soaking the pretreated continuous glass fiber cloth into graphene dispersion liquid for 15min, and taking out for vacuum drying; drying, soaking in a silicon dioxide dispersion liquid, standing for 18min, regulating the pH of the silicon dioxide dispersion liquid to 9, heating to 70 ℃, carrying out heat preservation reaction for 2.5h, taking out, and then carrying out vacuum drying to obtain graphene oxide-silicon dioxide loaded fiber cloth; the bath ratio during soaking is 1:10.
mixing an epoxy monomer containing allyl with toluene to obtain an epoxy monomer solution; the concentration of the epoxy monomer solution is 4g/L; soaking fiber cloth loaded with graphene oxide-silicon dioxide into an epoxy monomer solution, stirring and reacting for 35min under a nitrogen environment, wherein the reaction temperature is 90 ℃, adding azodiisobutyronitrile, continuing to react for 11h, taking out after the reaction, and washing and drying to obtain modified glass fiber cloth; the azodiisobutyronitrile is 1wt% of the epoxy monomer; the mass ratio of the fiber cloth loaded with the graphene oxide-silicon dioxide to the epoxy monomer is 1:8.
(3) Mixing epoxy resin and an allyl-containing epoxy monomer, adding a curing agent, and uniformly mixing to obtain a glue solution; coating glue solution on two sides of the modified glass fiber cloth, and curing to form prepreg; coating amount was 250g/m 2 。
The mass ratio of the epoxy resin to the allyl-containing epoxy monomer to the curing agent is 5:1:1.5; the curing agent is polyamide 650.
And stacking four layers of prepregs from top to bottom, and performing hot pressing and compounding to obtain a finished product.
Comparative example 7: control was performed on the basis of example 4, and in comparative example 7, an allyl-containing epoxy monomer was not added to the dope.
A production process of a composite board mobile phone cover with textures comprises the following steps:
(1) Mixing graphene oxide with deionized water, stirring for 25min, and performing ultrasonic dispersion for 1.5h to obtain graphene dispersion liquid with the concentration of 4g/L;
mixing a silane coupling agent A with ethanol with equal mass to obtain a mixed solution; the silane coupling agent A is prepared by mixing KH-550 and KH-560, wherein the molar ratio of KH-550 to KH-560 is 3:1.
mixing silicon dioxide and deionized water for 25min by ultrasonic stirring, adding the mixed solution at 55 ℃, reacting for 1.5h by heat preservation, heating to 75 ℃, and performing heat preservation for 2.5h to obtain silicon dioxide dispersion; the mass ratio of the silicon dioxide to the deionized water is 1:50; the mass ratio of the silicon dioxide to the silane coupling agent A is 10:1.
(2) Taking a silane coupling agent B, absolute ethyl alcohol and deionized water, and performing ultrasonic dispersion for 25min to obtain a silane coupling agent solution; and soaking the continuous glass fiber cloth into a silane coupling agent solution for 25min, taking out, and vacuum drying to obtain the pretreated continuous glass fiber cloth. The silane coupling agent B is KH-843, and the mass ratio of the silane coupling agent B to the absolute ethyl alcohol to the deionized water is 5:12:2; the bath ratio is 1:10.
soaking the pretreated continuous glass fiber cloth into graphene dispersion liquid for 15min, and taking out for vacuum drying; drying, soaking in a silicon dioxide dispersion liquid, standing for 18min, regulating the pH of the silicon dioxide dispersion liquid to 9, heating to 70 ℃, carrying out heat preservation reaction for 2.5h, adding gamma-mercaptopropyl trimethoxy silane, continuously stirring for 25min, taking out, and carrying out vacuum drying to obtain graphene oxide-silicon dioxide loaded fiber cloth; the bath ratio during soaking is 1:10. the molar ratio of KH-550 to gamma-mercaptopropyl trimethoxysilane is 1:3.
mixing an epoxy monomer containing allyl with toluene to obtain an epoxy monomer solution; the concentration of the epoxy monomer solution is 4g/L; soaking fiber cloth loaded with graphene oxide-silicon dioxide into an epoxy monomer solution, stirring and reacting for 35min under a nitrogen environment, wherein the reaction temperature is 90 ℃, adding azodiisobutyronitrile, continuing to react for 11h, taking out after the reaction, and washing and drying to obtain modified glass fiber cloth; the azodiisobutyronitrile is 1wt% of the epoxy monomer; the mass ratio of the fiber cloth loaded with the graphene oxide-silicon dioxide to the epoxy monomer is 1:8.
(3) Taking epoxy resin, adding a curing agent, and uniformly mixing to obtain a glue solution; coating glue solution on two sides of the modified glass fiber cloth, and curing to form prepreg; coating amount was 250g/m 2 . The mass ratio of the epoxy resin to the curing agent is 4:1, a step of; the curing agent is polyamide 650.
And stacking four layers of prepregs from top to bottom, and performing hot pressing and compounding to obtain a finished product.
Comparative example 8: control was performed on the basis of example 4, with no silica introduced in comparative example 8.
A production process of a composite board mobile phone cover with textures comprises the following steps:
(1) Mixing graphene oxide with deionized water, stirring for 25min, and performing ultrasonic dispersion for 1.5h to obtain graphene dispersion liquid with the concentration of 4g/L;
(2) Taking a silane coupling agent B, absolute ethyl alcohol and deionized water, and performing ultrasonic dispersion for 25min to obtain a silane coupling agent solution; and soaking the continuous glass fiber cloth into a silane coupling agent solution for 25min, taking out, and vacuum drying to obtain the pretreated continuous glass fiber cloth. The silane coupling agent B is KH-843, and the mass ratio of the silane coupling agent B to the absolute ethyl alcohol to the deionized water is 5:12:2; the bath ratio is 1:10.
soaking the pretreated continuous glass fiber cloth into graphene dispersion liquid for 15min, adding gamma-mercaptopropyl trimethoxy silane, continuously stirring for 25min, taking out, and vacuum drying to obtain graphene oxide-loaded fiber cloth; the bath ratio during soaking is 1:10. the molar ratio of the graphene oxide to the gamma-mercaptopropyl trimethoxysilane is 1:4.
mixing an epoxy monomer containing allyl with toluene to obtain an epoxy monomer solution; the concentration of the epoxy monomer solution is 4g/L; soaking fiber cloth loaded with graphene oxide-silicon dioxide into an epoxy monomer solution, stirring and reacting for 35min under a nitrogen environment, wherein the reaction temperature is 90 ℃, adding azodiisobutyronitrile, continuing to react for 11h, taking out after the reaction, and washing and drying to obtain modified glass fiber cloth; the azodiisobutyronitrile is 1wt% of the epoxy monomer; the mass ratio of the fiber cloth loaded with the graphene oxide-silicon dioxide to the epoxy monomer is 1:8.
(3) Mixing epoxy resin and an allyl-containing epoxy monomer, adding a curing agent, and uniformly mixing to obtain a glue solution; coating glue solution on two sides of the modified glass fiber cloth, and curing to form prepreg; coating amount was 250g/m 2 . The mass ratio of the epoxy resin to the allyl-containing epoxy monomer to the curing agent is 5:1:1.5; the curing agent is polyamide 650.
And stacking four layers of prepregs from top to bottom, and performing hot pressing and compounding to obtain a finished product.
Detection experiment:
1. the cover plate samples prepared in examples 1 to 4 and comparative examples 1 to 8 were taken to have a size of 10cm×8cm, immersed in distilled water at normal temperature for 7 days, taken out, wiped to dry the surface moisture, weighed and recorded before and after immersion, respectively, and the% water absorption was calculated.
2. Cover plate samples prepared in examples 1-4 and comparative examples 1-8 were taken, and bending strength was measured according to GB/T9341-2008 "determination of Plastic bending Property"; after the test, the test piece was left at 140℃for 7 days in a 100% humidity environment, and the bending strength was again measured.
3. Samples of the cover plates prepared in examples 1 to 4 and comparative examples 1 to 8 were treated at 250℃for 3 hours, and the change in appearance was observed.
Project Flexural Strength (MPa) Flexural Strength after Placement (MPa) Water absorption percentage% Appearance (250 ℃,3 h)
Example 1 627 514 0.8％ No layering and no discoloration
Example 2 631 517 0.7％ No layering and no discoloration
Example 3 623 511 0.7％ No layering and no discoloration
Example 4 646 544 0.6％ No layering and no discoloration
Comparative example 1 628 502 0.9％ /
Comparative example 2 626 476 1.6％ /
Comparative example 3 617 495 0.7％ /
Comparative example 4 611 476 0.9％ /
Comparative example 5 602 469 1.1％ /
Comparative example 6 596 458 1.4％ /
Comparative example 7 593 421 2.1％ /
Comparative example 8 588 474 0.7％ /
Conclusion: the scheme discloses a production process of a composite board mobile phone cover with textures, which is reasonable in process design and simple to operate, and the prepared composite mobile phone cover plate has excellent strength and mechanical property, and the surface of the composite mobile phone cover plate is excellent in waterproof and moistureproof properties, excellent in high temperature resistance and high in practicability.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present application, and the present application is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present application has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (6)

1. A production process of a composite board mobile phone cover with textures is characterized in that: the method comprises the following steps:
mixing epoxy resin and an allyl-containing epoxy monomer, adding a curing agent, and uniformly mixing to obtain a glue solution; coating glue solution on two sides of the modified glass fiber cloth, and curing to form prepreg;
stacking a plurality of layers of prepreg from top to bottom, and placing a texture film on the upper surface, wherein the texture film comprises a PET bottom layer and a UV adhesive layer with texture patterns, the UV adhesive layer is contacted with the prepreg, and the PET bottom layer is removed by hot-pressing and compounding to obtain a mobile phone cover with texture;
the preparation method of the modified glass fiber cloth comprises the following steps:
(1) Mixing graphene oxide with deionized water, stirring for 20-30 min, and performing ultrasonic dispersion for 1-1.5 h to obtain graphene dispersion liquid;
mixing a silane coupling agent A with ethanol to obtain a mixed solution; taking silicon dioxide and deionized water, ultrasonically stirring for 20-30 min, adding the mixed solution at 50-60 ℃, carrying out heat preservation reaction for 1-1.5 h, then heating to 70-80 ℃, and carrying out heat preservation treatment for 2-2.5 h to obtain a silicon dioxide dispersion liquid; wherein the silane coupling agent A is mixed by KH-550 and KH-560; the molar ratio of KH-550 to KH-560 is 3:1, a step of; the mass ratio of the silicon dioxide to the silane coupling agent A is 10:1, a step of;
(2) Soaking the continuous glass fiber cloth into the graphene dispersion liquid for 10-20 min, and taking out for vacuum drying; soaking the fiber cloth in a silicon dioxide dispersion liquid, standing for 15-20 min, adjusting the pH of the silicon dioxide dispersion liquid to 8-9, heating to 65-75 ℃, carrying out heat preservation reaction for 2-3 h, adding gamma-mercaptopropyl trimethoxy silane, continuously stirring for 20-30 min, taking out, and carrying out vacuum drying to obtain the fiber cloth loaded with graphene oxide-silicon dioxide; the molar ratio of KH-550 to gamma-mercaptopropyl trimethoxysilane is 1:3, a step of;
mixing an epoxy monomer containing allyl with toluene to obtain an epoxy monomer solution; soaking the fiber cloth loaded with graphene oxide-silicon dioxide into an epoxy monomer solution, stirring and reacting for 30-40 min under a nitrogen environment, wherein the reaction temperature is 85-90 ℃, adding azodiisobutyronitrile, continuously reacting for 10-12 h, taking out after the reaction, washing and drying to obtain the modified glass fiber cloth;
the preparation method of the epoxy monomer containing allyl comprises the following steps:
s1: dissolving diphenol monomer with absolute ethyl alcohol, adding absolute potassium carbonate, heating to 80-85 ℃, stirring and reacting for 1-1.5 h, slowly dripping allyl bromide during the reaction, continuing the reaction for 6-8 h, collecting a product after the reaction, washing the product sequentially with absolute ethyl alcohol and deionized water, vacuum drying, heating to 170-180 ℃ under nitrogen atmosphere, carrying out heat preservation treatment for 20-30 min, continuously heating to 210-215 ℃, carrying out heat preservation and reacting for 1.5-2 h, and obtaining monomer containing allyl; the diphenol monomers include 3-fluorobiphenyl-4, 4 '-diphenol, 4' -amino-4-diphenol and biphenol;
s2: mixing and stirring allyl-containing monomers, epichlorohydrin, benzyl triethyl ammonium chloride and dioxane for 20-30 min, heating to 90-95 ℃, stirring and reacting for 4-5 h, collecting a product after the reaction, mixing the product with toluene, dropwise adding sodium hydroxide solution at 85-90 ℃ for continuous reaction for 4-5 h, washing with deionized water after the reaction, and vacuum drying to obtain allyl-containing epoxy monomers;
in the step S2, the molar ratio of the monomer containing allyl, the epichlorohydrin and the benzyl triethyl ammonium chloride is 1:4:0.5.
2. the process for producing the textured composite board mobile phone cover according to claim 1, wherein the process comprises the following steps: in the step S1, the molar ratio of the 3-fluorobiphenyl-4, 4 '-diphenol, the 4' -amino-4-diphenol and the biphenyldiphenol is 1:1:1, a step of; the molar ratio of the diphenol monomer to the anhydrous potassium carbonate to the allyl bromide is 1: (2.5-3): (4-5).
3. The process for producing the textured composite board mobile phone cover according to claim 1, wherein the process comprises the following steps: in the step (2), the continuous glass fiber cloth is pretreated, and the specific steps are as follows: taking the silane coupling agent B, absolute ethyl alcohol and deionized water, and performing ultrasonic dispersion for 20-30 min to obtain a silane coupling agent solution; and soaking the continuous glass fiber cloth into the silane coupling agent solution for 20-30 min, taking out, and vacuum drying to obtain the pretreated continuous glass fiber cloth.
4. A process for producing a textured composite board cell phone cover according to claim 3, wherein: the silane coupling agent B is KH-843.
5. The process for producing the textured composite board mobile phone cover according to claim 1, wherein the process comprises the following steps: the mass ratio of the epoxy resin to the allyl-containing epoxy monomer to the curing agent is 5:1:1.5; the curing agent is polyamide 650.
6. A cellular phone cover manufactured by a process for manufacturing a cellular phone cover with a composite board and texture according to any one of claims 1 to 5.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103770390A (en) * 2014-01-09 2014-05-07 广州金发碳纤维新材料发展有限公司 Continuous fiber ultrathin composite material sheet with different surface patterns and preparation method and application of sheet
CN113061275A (en) * 2021-03-23 2021-07-02 惠州市纵胜电子材料有限公司 Production process of spraying plate for main battery cover of mobile phone
CN113681935A (en) * 2021-08-13 2021-11-23 惠州市众力电子科技有限公司 Production process and application of transparent 3D glass fiber board with textures

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103146147B (en) * 2013-02-06 2016-05-04 常州龙途新材料科技有限公司 A kind of epoxy resin toughened/glass fibre prepreg and preparation method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103770390A (en) * 2014-01-09 2014-05-07 广州金发碳纤维新材料发展有限公司 Continuous fiber ultrathin composite material sheet with different surface patterns and preparation method and application of sheet
CN113061275A (en) * 2021-03-23 2021-07-02 惠州市纵胜电子材料有限公司 Production process of spraying plate for main battery cover of mobile phone
CN113681935A (en) * 2021-08-13 2021-11-23 惠州市众力电子科技有限公司 Production process and application of transparent 3D glass fiber board with textures

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
烯丙基功能化环氧树脂的设计、制备及性能研究;戴雪岩;中国博士学位论文全文数据库（电子期刊）;B016-209 *

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