CN112358633B - Carbon cloth-epoxy resin composite material and preparation method and application thereof - Google Patents
Carbon cloth-epoxy resin composite material and preparation method and application thereof Download PDFInfo
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- 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
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
- C08J5/042—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with carbon fibres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/5006—Amines aliphatic
- C08G59/502—Polyalkylene polyamines
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/5026—Amines cycloaliphatic
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- 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
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- 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
- C08J2363/02—Polyglycidyl ethers of bis-phenols
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- 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
- C08K7/06—Elements
Abstract
The invention belongs to the field of polymer composite materials, and particularly relates to a carbon cloth-epoxy resin composite material as well as a preparation method and application thereof. The carbon cloth-epoxy resin composite material comprises carbon cloth, setting resin and molding resin, wherein the setting resin is bisphenol A epoxy resin with medium molecular weight, and the molding resin comprises a component A and a component B; the component A is a mixture of low-molecular-weight bisphenol A epoxy resin and 1, 4-butanediol diglycidyl ether, and the component B comprises isophorone diamine, m-cyclohexyldimethylamine and polyetheramine 230; the invention also provides a preparation method of the carbon cloth-epoxy resin composite material, and the method has the characteristics of short curing time, low curing temperature, easiness in operation, low cost and the like.
Description
Technical Field
The invention belongs to the field of polymer composite materials, and particularly relates to a carbon cloth-epoxy resin composite material as well as a preparation method and application thereof.
Background
Carbon Fiber (CF), a fibrous Carbon material with a Carbon content of 95% or more, has a series of excellent properties such as high specific strength, high specific modulus, high temperature resistance, wear resistance, corrosion resistance, fatigue resistance, low electrical resistance, high thermal conductivity, low thermal expansion, and high electromagnetic shielding performance. In addition, carbon fiber has the advantages of fiber flexibility and knittability, the density is less than 1/4 of steel, but the tensile strength is 7-9 times of steel, the Young modulus is more than 2-3 times of Glass Fiber (GF) or Kevlar fiber (K-49), and the carbon fiber is one of the most important reinforcing materials of advanced composite materials.
The carbon fiber is usually used as a reinforcing material and polymers such as epoxy resin, phenolic resin, polytetrafluoroethylene and the like are combined to form a composite material, wherein the carbon fiber-epoxy resin composite material is an advanced composite material which takes the epoxy resin as a matrix and takes the carbon fiber as a reinforcement material, and the carbon fiber-epoxy resin composite material has a series of excellent performances such as high fatigue strength, small thermal expansion coefficient, corrosion resistance, stable structure size, freely designed material performance and the like besides the main performance of the advanced composite material, namely high specific strength and specific modulus. As a new advanced composite material, the carbon fiber-epoxy resin composite material can be used as a structural material for bearing load, and can meet the fields with strict requirements on weight, strength, rigidity, fatigue property and the like, in addition, the high temperature and chemical stability of the carbon fiber-epoxy resin composite material enable the carbon fiber-epoxy resin composite material to also be used as a functional material to play a role, and the carbon fiber-epoxy resin composite material is widely applied to the fields of national defense, aerospace, automobile industry, building materials, light rail trains, energy power generation, biomedical appliances, sports and leisure equipment and the like, has numerous advantages compared with the traditional simple-substance metal, ceramic, polymer and other materials, and will gradually replace the traditional simple-substance metal, ceramic, polymer and other materials to become the leading in the future development.
Currently, the research focus of carbon fiber-epoxy resin composite materials focuses on the following aspects: firstly, researching the surface modification of carbon fiber; secondly, researching toughening and modification of the composite material; research on curing and composite forming process. Wherein, the curing of the epoxy resin-based composite material is completed by the reaction and crosslinking of the epoxy resin and the curing agent. In recent years, novel curing techniques and curing agents have been the focus of research efforts, and it is desired to further improve the properties of cured products, reduce the conditions required by a curing reaction system, and the like, and obtain composite materials with more excellent properties.
Disclosure of Invention
In order to overcome the disadvantages and shortcomings of the prior art, the primary object of the present invention is to provide a carbon cloth-epoxy resin composite material.
The invention also aims to provide a preparation method of the carbon cloth-epoxy resin composite material, which has the characteristics of short curing time, low curing temperature, easiness in operation, low cost and the like.
The invention also aims to provide application of the carbon cloth-epoxy resin composite material.
The purpose of the invention is realized by the following technical scheme:
a carbon cloth-epoxy resin composite material comprises carbon cloth, setting resin and molding resin;
the setting resin is bisphenol A epoxy resin with medium molecular weight;
the molding resin comprises a component A and a component B;
the component A is a mixture of low molecular weight bisphenol A epoxy resin and 1, 4-butanediol diglycidyl ether (BDDE), wherein the BDDE has a good effect of reducing the viscosity of the resin, can greatly improve the impact resistance of the product, and has a wide range of raw material sources;
the viscosity of the component A is preferably 2000cps to 4000 cps;
the component B comprises the following raw materials in percentage by mass:
30-45% of isophorone diamine;
20-35% of m-cyclohexyldimethylamine;
23020-35% of polyether amine;
the mass ratio of the component A to the component B is preferably 4: 1;
the preferable medium molecular weight bisphenol A epoxy resin is E-20;
the low molecular weight bisphenol A epoxy resin is preferably south Asia 128 or E-51;
the preparation method of the carbon cloth-epoxy resin composite material comprises the following steps:
(1) dissolving bisphenol A epoxy resin with medium molecular weight in a solvent to obtain bisphenol A epoxy resin solution with medium molecular weight; spraying or dip-coating the bisphenol A epoxy resin solution with medium molecular weight on the carbon cloth, drying and rolling to obtain the shaped carbon cloth;
(2) diluting low molecular weight bisphenol A epoxy resin to 2000-4000 cps with 1, 4-butanediol diglycidyl ether (BDDE) to obtain a molding resin component A; uniformly mixing isophorone diamine, m-cyclohexyldimethylamine and polyether amine 230 according to a ratio to obtain a molding resin component B; uniformly mixing the component A and the component B of the molding resin according to the mass ratio of 4:1 to obtain the molding resin;
(3) putting the shaped carbon cloth prepared in the step (1) into a mold cavity of a mold, and then pouring or spraying the shaped resin prepared in the step (2) onto the shaped carbon cloth in the mold cavity to obtain the shaped carbon cloth with the shaped resin on the surface; repeating the operation for 2-4 times to form a composite layered structure which has 3-5 layers of shaped carbon cloth and is formed by continuous and alternate molding resin and the shaped carbon cloth;
(4) heating the mould to 110-120 ℃, standing for 5-10 min for curing, and cooling to obtain the carbon cloth-epoxy resin composite material;
the solvent in step (1) is preferably methyl acetate;
the content of the medium molecular weight bisphenol A epoxy resin in the shaped carbon cloth in the step (1) is preferably 20-35 wt%;
the drying in the step (1) is preferably drying;
the temperature of the dilution in the step (3) is preferably 25 ℃ at room temperature;
the content of the resin in the shaped carbon cloth with the surface provided with the molding resin in the step (3) is preferably 15-25 wt%;
the curing time in the step (4) can be shortened or prolonged according to the thickness of the actually formed resin/formed carbon cloth superposed layer, wherein if the thickness of the formed resin/formed carbon cloth superposed layer is thicker, the retention time is longer;
the carbon cloth-epoxy resin composite material is applied to the field of decorative materials;
the carbon cloth-epoxy resin composite material is applied to the fields of sports and leisure equipment decorative materials, box packaging decorative materials and automobile decorative materials;
compared with the prior art, the invention has the following advantages and effects:
(1) according to the invention, bisphenol A type epoxy resins with different molecular weights are adopted to respectively shape and form the carbon cloth, wherein the bisphenol A type epoxy resin with the medium molecular weight is firstly adopted to shape the carbon cloth, so that the obtained shaped carbon cloth can be ensured to have dry and comfortable surface and no disordered lines; further adopt low molecular weight bisphenol A type epoxy to carry out the shaping to carbon cloth, wherein, low molecular weight bisphenol A type epoxy mobility is good, to the mould die cavity of large tracts of land, structure complicacy, resin flow is balanced among the forming process for the product can impregnate or permeate well, avoids appearing defects such as more space even having the gas pocket.
(2) According to the invention, isophorone diamine, m-cyclohexyldimethylamine and polyether amine 230 are used as curing agents, so that the curing time and the curing temperature are greatly reduced, and the properties such as the glossiness and the transparency of a finished product can be improved.
(3) The preparation method of the carbon cloth-epoxy resin composite material provided by the invention is simple to operate, low in cost and suitable for industrial production.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1
(1) Dissolving medium molecular weight bisphenol A epoxy resin (E-20) in methyl acetate to obtain medium molecular weight bisphenol A epoxy resin solution; coating the carbon cloth with a bisphenol A epoxy resin solution with a medium molecular weight in a dipping way, drying and rolling to obtain the shaped carbon cloth with dry and comfortable surface and no disordered lines, wherein the content of the bisphenol A epoxy resin with the medium molecular weight in the shaped carbon cloth is 30 wt%;
(2) diluting low molecular weight bisphenol A epoxy resin (E-51) with 1, 4-butanediol diglycidyl ether (BDDE) at room temperature of 25 deg.C to viscosity of 3000cps to obtain molding resin component A; uniformly mixing isophorone diamine, m-cyclohexyldimethylamine and polyether amine 230 according to 35%, 35% and 30% by mass to obtain a molding resin component B; uniformly mixing the component A and the component B of the molding resin according to the mass ratio of 4:1 to obtain the molding resin;
(3) putting the shaped carbon cloth prepared in the step (1) into a mold cavity of a mold, and pouring the molding resin prepared in the step (2) onto the shaped carbon cloth in the mold cavity to obtain the shaped carbon cloth with the molding resin on the surface, wherein the content of the molding resin in the shaped carbon cloth with the molding resin on the surface is 20 wt%; repeating the operation for 3 times to form a composite layered structure which is provided with 4 layers of shaped carbon cloth and is formed by continuously and alternately molding resin and the shaped carbon cloth;
(4) and heating the mould to 115 ℃, standing for 7min for curing, and cooling to obtain the carbon cloth-epoxy resin composite material.
Example 2
(1) Dissolving medium molecular weight bisphenol A epoxy resin (E-20) in methyl acetate to obtain medium molecular weight bisphenol A epoxy resin solution; coating the carbon cloth with a bisphenol A epoxy resin solution with a medium molecular weight in a dipping way, drying and rolling to obtain the shaped carbon cloth with dry and comfortable surface and no disordered lines, wherein the content of the bisphenol A epoxy resin with the medium molecular weight in the shaped carbon cloth is 35 wt%;
(2) diluting low molecular weight bisphenol A epoxy resin (E-51) with 1, 4-butanediol diglycidyl ether (BDDE) to viscosity of 2000cps at room temperature of 25 deg.C to obtain molding resin component A; uniformly mixing isophorone diamine, m-cyclohexyldimethylamine and polyether amine 230 according to the mass percent of 45%, 30% and 25% to obtain a molding resin component B; uniformly mixing the component A and the component B of the molding resin according to the mass ratio of 4:1 to obtain the molding resin;
(3) putting the shaped carbon cloth prepared in the step (1) into a mold cavity of a mold, and pouring the molding resin prepared in the step (2) onto the shaped carbon cloth in the mold cavity to obtain the shaped carbon cloth with the molding resin on the surface, wherein the content of the molding resin in the shaped carbon cloth with the molding resin on the surface is 25 wt%; repeating the operation for 2 times to form a composite layered structure which is provided with 3 layers of shaped carbon cloth and is formed by continuously and alternately molding resin and the shaped carbon cloth;
(4) and heating the mould to 110 ℃, standing for 5min for curing, and cooling to obtain the carbon cloth-epoxy resin composite material.
Example 3
(1) Dissolving medium molecular weight bisphenol A epoxy resin (E-20) in methyl acetate to obtain medium molecular weight bisphenol A epoxy resin solution; coating the carbon cloth with a bisphenol A epoxy resin solution with a medium molecular weight in a dipping way, drying and rolling to obtain the shaped carbon cloth with dry and comfortable surface and no disordered lines, wherein the content of the bisphenol A epoxy resin with the medium molecular weight in the shaped carbon cloth is 20 wt%;
(3) diluting low molecular weight bisphenol A epoxy resin (E-51) with 1, 4-butanediol diglycidyl ether (BDDE) to viscosity 4000cps at room temperature of 25 deg.C to obtain molding resin component A; uniformly mixing isophorone diamine, m-cyclohexyldimethylamine and polyether amine 230 according to the mass percentage of 30%, 35% and 35% to obtain a molding resin component B; uniformly mixing the component A and the component B of the molding resin according to the mass ratio of 4:1 to obtain the molding resin;
(3) putting the shaped carbon cloth prepared in the step (1) into a mold cavity of a mold, and pouring the molding resin prepared in the step (2) onto the shaped carbon cloth in the mold cavity to obtain the shaped carbon cloth with the molding resin on the surface, wherein the content of the molding resin in the shaped carbon cloth with the molding resin on the surface is 15 wt%; repeating the operation for 4 times to form a composite layered structure which is provided with 5 layers of shaped carbon cloth and is formed by continuously and alternately molding resin and the shaped carbon cloth;
(5) and heating the mould to 120 ℃, standing for 10min for curing, and cooling to obtain the carbon cloth-epoxy resin composite material.
Comparative example 1
Dissolving low molecular weight bisphenol A epoxy resin in methyl acetate to obtain low molecular weight bisphenol A epoxy resin solution; and (3) dip-coating the medium-molecular-weight bisphenol A epoxy resin solution on the carbon cloth, drying and rolling to obtain the shaped carbon cloth.
Compared with the embodiment 1, the embodiment adopts the low molecular weight bisphenol A epoxy resin, all carbon cloths can stick together after drying and rolling, the lines are disordered, subsequent molding and curing can not be carried out, if the subsequent molding and curing are directly carried out after drying, the obtained composite material can stick to a workpiece, and the subsequent construction can not be carried out.
Comparative example 2
(1) Dissolving medium molecular weight bisphenol A epoxy resin (E-20) in methyl acetate to obtain medium molecular weight bisphenol A epoxy resin solution; coating the carbon cloth with a bisphenol A epoxy resin solution with a medium molecular weight in a dipping way, drying and rolling to obtain various shaped carbon cloth with dry and comfortable surface and no disordered lines, wherein the content of the bisphenol A epoxy resin with the medium molecular weight in the shaped carbon cloth is 30 wt%;
(2) diluting low molecular weight bisphenol A epoxy resin (E-51) with 1, 4-butanediol diglycidyl ether (BDDE) to viscosity 3000cps at room temperature of 25 deg.C to obtain molding resin component A; uniformly mixing the component A of the molding resin and a curing agent m-cyclohexyldimethylamine according to the mass ratio of 4:1 to obtain the molding resin;
(3) and (2) putting the shaped carbon cloth prepared in the step (1) into a mold cavity of a mold, and pouring the molding resin prepared in the step (2) onto the shaped carbon cloth in the mold cavity to quickly cure the resin, wherein the resin flows unevenly, so that the shaped carbon cloth cannot be well impregnated or permeated, and the defects of more gaps, air holes and the like are generated.
Comparative example 3
(1) Dissolving medium molecular weight bisphenol A epoxy resin (E-20) in methyl acetate to obtain medium molecular weight bisphenol A epoxy resin solution; coating the carbon cloth with a bisphenol A epoxy resin solution with a medium molecular weight in a dipping way, drying and rolling to obtain the shaped carbon cloth with dry and comfortable surface and no disordered lines, wherein the content of the bisphenol A epoxy resin with the medium molecular weight in the shaped carbon cloth is 30 wt%;
(2) diluting low molecular weight bisphenol A epoxy resin (E-51) with 1, 4-butanediol diglycidyl ether (BDDE) to viscosity 3000cps at room temperature of 25 deg.C to obtain molding resin component A; uniformly mixing the component A of the molding resin and a curing agent isophorone diamine according to a mass ratio of 4:1 to obtain the molding resin;
(3) putting the shaped carbon cloth prepared in the step (1) into a mold cavity of a mold, and then pouring the molding resin prepared in the step (2) onto the shaped carbon cloth in the mold cavity to obtain the shaped carbon cloth with the molding resin on the surface, wherein the content of the molding resin in the shaped carbon cloth with the molding resin on the surface is 20 wt%; repeating the operation for 3 times to form a composite layered structure which is provided with 4 layers of shaped carbon cloth and is formed by continuously and alternately molding resin and the shaped carbon cloth;
(4) and heating the mould to 120 ℃, standing for more than 30min for curing, and cooling to obtain the carbon cloth-epoxy resin composite material.
Compared with the example 1, the single curing agent is adopted for curing, the curing time is more than 30min, and the hardness and the toughness (bending strength) of the prepared carbon cloth-epoxy resin composite material are respectively reduced by 5% and 10%.
Comparative example 4
(1) Dissolving medium molecular weight bisphenol A epoxy resin (E-20) in methyl acetate to obtain medium molecular weight bisphenol A epoxy resin solution; coating the carbon cloth with a bisphenol A epoxy resin solution with a medium molecular weight in a dipping way, drying and rolling to obtain the shaped carbon cloth with dry and comfortable surface and no disordered lines, wherein the content of the bisphenol A epoxy resin with the medium molecular weight in the shaped carbon cloth is 30 wt%;
(2) diluting low molecular weight bisphenol A epoxy resin (E-51) with 1, 4-butanediol diglycidyl ether (BDDE) to viscosity 3000cps at room temperature of 25 deg.C to obtain molding resin component A; uniformly mixing the component A of the molding resin and a curing agent diethylenetriamine according to a mass ratio of 4:1 to obtain the molding resin;
(3) putting the shaped carbon cloth prepared in the step (1) into a mold cavity of a mold, and then pouring the molding resin prepared in the step (2) onto the shaped carbon cloth in the mold cavity to obtain the shaped carbon cloth with the molding resin on the surface, wherein the content of the molding resin in the shaped carbon cloth with the molding resin on the surface is 20 wt%; repeating the operation for 3 times to form a composite layered structure which is provided with 4 layers of shaped carbon cloth and is formed by continuously and alternately molding resin and the shaped carbon cloth;
(4) and heating the mould to 120 ℃, standing for more than 40min for curing, and cooling to obtain the carbon cloth-epoxy resin composite material.
When the aliphatic amine-based curing agent is used, the brittleness of the resulting carbon cloth-epoxy resin composite material is increased, the weather resistance is remarkably shortened, and the curing speed is slow as compared with example 1.
Comparative example 5
(1) Dissolving medium molecular weight bisphenol A epoxy resin (E-20) in methyl acetate to obtain medium molecular weight bisphenol A epoxy resin solution; coating the carbon cloth with a bisphenol A epoxy resin solution with a medium molecular weight in a dipping way, drying and rolling to obtain the shaped carbon cloth with dry and comfortable surface and no disordered lines, wherein the content of the bisphenol A epoxy resin with the medium molecular weight in the shaped carbon cloth is 30 wt%;
(2) diluting low molecular weight bisphenol A epoxy resin (E-51) with 1, 4-butanediol diglycidyl ether (BDDE) to viscosity 3000cps at room temperature of 25 deg.C to obtain molding resin component A; uniformly mixing the component A of the molding resin and curing agent aniline according to a mass ratio of 4:1 to obtain molding resin;
(3) putting the shaped carbon cloth prepared in the step (1) into a mold cavity of a mold, and pouring the molding resin prepared in the step (2) onto the shaped carbon cloth in the mold cavity to obtain the shaped carbon cloth with the molding resin on the surface, wherein the content of the molding resin in the shaped carbon cloth with the molding resin on the surface is 20 wt%; repeating the operation for 3 times to form a composite layered structure which is provided with 4 layers of shaped carbon cloth and is formed by continuously and alternately molding resin and the shaped carbon cloth;
(4) and heating the mould to 120 ℃, standing for more than 1h for curing, and cooling to obtain the carbon cloth-epoxy resin composite material.
Compared with example 1, if aniline curing agent is used, the color of the prepared carbon cloth-epoxy resin composite material becomes dark and black, and the curing speed is slow, and the manufacturability is poor.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A carbon cloth-epoxy resin composite material is characterized by comprising carbon cloth, setting resin and molding resin;
the setting resin is bisphenol A epoxy resin with medium molecular weight;
the molding resin comprises a component A and a component B;
the component A is a mixture of low molecular weight bisphenol A epoxy resin and 1, 4-butanediol diglycidyl ether;
the component B comprises the following raw materials in percentage by mass:
30-45% of isophorone diamine;
20-35% of m-cyclohexyldimethylamine;
23020-35% of polyether amine;
the preparation method of the carbon cloth-epoxy resin composite material comprises the following steps:
(1) dissolving bisphenol A epoxy resin with medium molecular weight in a solvent to obtain bisphenol A epoxy resin solution with medium molecular weight; spraying or dip-coating the bisphenol A epoxy resin solution with medium molecular weight on the carbon cloth, drying and rolling to obtain the shaped carbon cloth;
(2) diluting low molecular weight bisphenol A epoxy resin to 2000-4000 cps with 1, 4-butanediol diglycidyl ether to obtain a molding resin A component; uniformly mixing isophorone diamine, m-cyclohexyldimethylamine and polyether amine 230 according to a ratio to obtain a molding resin component B; uniformly mixing the component A and the component B of the molding resin according to the mass ratio of 4:1 to obtain the molding resin;
(3) putting the shaped carbon cloth prepared in the step (1) into a mold cavity of a mold, and then pouring or spraying the shaped resin prepared in the step (2) onto the shaped carbon cloth in the mold cavity to obtain the shaped carbon cloth with the shaped resin on the surface; repeating the operation for 2-4 times to form a composite layered structure which has 3-5 layers of shaped carbon cloth and is formed by continuous and alternate molding resin and the shaped carbon cloth;
(4) and heating the die to 110-120 ℃, standing for 5-10 min for curing, and cooling to obtain the carbon cloth-epoxy resin composite material.
2. The carbon cloth-epoxy composite material of claim 1, wherein:
the bisphenol A epoxy resin with the medium molecular weight is E-20.
3. The carbon cloth-epoxy composite of claim 1, wherein:
the low molecular weight bisphenol A epoxy resin is south Asia 128 or E-51.
4. The method for preparing the carbon cloth-epoxy resin composite material as claimed in any one of claims 1 to 3, characterized by comprising the steps of:
(1) dissolving medium molecular weight bisphenol A epoxy resin in a solvent to obtain medium molecular weight bisphenol A epoxy resin solution; spraying or dip-coating the bisphenol A epoxy resin solution with medium molecular weight on the carbon cloth, drying and rolling to obtain the shaped carbon cloth;
(2) diluting low molecular weight bisphenol A epoxy resin to 2000-4000 cps with 1, 4-butanediol diglycidyl ether to obtain a molding resin A component; uniformly mixing isophorone diamine, m-cyclohexyldimethylamine and polyether amine 230 according to a ratio to obtain a molding resin component B; uniformly mixing the component A and the component B of the molding resin according to the mass ratio of 4:1 to obtain the molding resin;
(3) putting the shaped carbon cloth prepared in the step (1) into a mold cavity of a mold, and then pouring or spraying the shaped resin prepared in the step (2) onto the shaped carbon cloth in the mold cavity to obtain the shaped carbon cloth with the shaped resin on the surface; repeating the operation for 2-4 times to form a composite layered structure which has 3-5 layers of shaped carbon cloth and is formed by continuous and alternate molding resin and the shaped carbon cloth;
(4) and heating the die to 110-120 ℃, standing for 5-10 min for curing, and cooling to obtain the carbon cloth-epoxy resin composite material.
5. The method for preparing a carbon cloth-epoxy resin composite material according to claim 4, characterized in that:
the solvent in the step (1) is methyl acetate.
6. The method for preparing a carbon cloth-epoxy resin composite material according to claim 4, characterized in that:
the content of the setting resin in the setting carbon cloth in the step (1) is 20-35 wt%.
7. The method for preparing a carbon cloth-epoxy resin composite material according to claim 4, characterized in that:
the drying in the step (1) is drying.
8. The method for preparing a carbon cloth-epoxy resin composite material according to claim 4, characterized in that:
the temperature of the dilution described in step (2) was 25 ℃ at room temperature.
9. The method for preparing a carbon cloth-epoxy resin composite material according to claim 4, characterized in that:
the content of the resin in the shaped carbon cloth with the surface provided with the molding resin in the step (3) is 15-25 wt%.
10. Use of the carbon cloth-epoxy resin composite material as set forth in any one of claims 1 to 3 in the field of decorative materials.
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| CN105778426A (en) * | 2016-05-20 | 2016-07-20 | 江苏兆鋆新材料股份有限公司 | Preparation and application of high-wettability epoxy resin composite material |
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| WO2018036506A1 (en) * | 2016-08-25 | 2018-03-01 | 惠柏新材料科技（上海）股份有限公司 | Epoxy resin composition with rapid curing and low linear shrinkage |
| WO2019111607A1 (en) * | 2017-12-07 | 2019-06-13 | 三菱瓦斯化学株式会社 | Epoxy resin curing agent, epoxy resin composition and cured product of same, and fiber-reinforced composite material |
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| CN105778426A (en) * | 2016-05-20 | 2016-07-20 | 江苏兆鋆新材料股份有限公司 | Preparation and application of high-wettability epoxy resin composite material |
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| CN106626439A (en) * | 2016-12-27 | 2017-05-10 | 长春工业大学 | Preparation method of low-cost and large-tow 48K carbon fiber preimpregnated cloth and composite material thereof |
| WO2019111607A1 (en) * | 2017-12-07 | 2019-06-13 | 三菱瓦斯化学株式会社 | Epoxy resin curing agent, epoxy resin composition and cured product of same, and fiber-reinforced composite material |
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