CN-121991468-A - High-modulus and high-toughness carbon fiber epoxy composite material and preparation method thereof

CN121991468ACN 121991468 ACN121991468 ACN 121991468ACN-121991468-A

Abstract

The invention discloses a high-modulus and high-toughness carbon fiber epoxy composite material and a preparation method thereof. The composite material consists of an epoxy resin matrix material and at least 2 carbon fiber cloth layers, wherein the carbon fiber cloth layers are penetrated at intervals along the thickness direction of the epoxy resin matrix material. The epoxy resin matrix material is uniformly dispersed with tellurium zinc molybdate modified by a silane coupling agent, and the mass percentage of the tellurium zinc molybdate is 0.1-20 percent. The preparation method of tellurium zinc molybdate comprises the steps of mixing and grinding polycrystal ZnTeMoO 6 、TeO 2 and MoO 3 according to a certain molar ratio, melting to obtain monocrystal ZnTeMoO 6 powder, mixing a silane coupling agent with ethanol, adding monocrystal ZnTeMoO 6 powder for ultrasonic treatment, and settling and drying the reacted product to obtain modified tellurium zinc molybdate. The composite material has high modulus and high toughness, and is superior to the prior art.

Inventors

SHEN XIAOJUN
XU HUAN
ZHAO SANGEN
DANG RUIQIONG
GUAN JIPENG
YU LICHAO
PAN YAJIE

Assignees

嘉兴大学

Dates

Publication Date: 20260508
Application Date: 20241105

Claims (5)

1. A high-modulus and high-toughness carbon fiber epoxy composite material is characterized in that: Comprises an epoxy resin matrix material and more than 2 carbon fiber cloth layers penetrating through the epoxy resin matrix material at intervals along the thickness direction of the epoxy resin matrix material; Tellurium zinc molybdate with the surface modified by a silane coupling agent is uniformly dispersed in the epoxy resin matrix material; the mass percentage of tellurium zinc molybdate with the surface modified by the silane coupling agent relative to the epoxy resin matrix material is 0.1-20%; the tellurium zinc molybdate with the surface treated by the silane coupling agent is prepared by the following method: (1) Uniformly grinding a mixture of polycrystal ZnTeMoO 6 、TeO 2 and MoO 3 in a molar ratio of 1:2-5:2-5, transferring the mixture into a crucible, placing the crucible at 500-700 ℃ for 2-3 days until a melt is uniform, cooling to room temperature, and grinding to obtain monocrystal ZnTeMoO6 powder; (2) Mixing and stirring a silane coupling agent and ethanol in a volume ratio of 1:10-20 for 1-2h, then adding the monocrystal ZnTeMoO 6 powder obtained in the step1, and carrying out ultrasonic treatment for 10-30min until the monocrystal ZnTeMoO 6 powder and the silane coupling agent are uniformly dispersed, wherein the mass ratio of the monocrystal ZnTeMoO 6 powder to the silane coupling agent is 100:1-3; (3) Placing the solution obtained in the step (2) into a water bath kettle with the temperature of 80-100 ℃ for heat preservation for 1-3 hours, and stirring at the speed of 100-1000 rpm in the heat preservation process; (4) And (3) naturally settling the product obtained after the reaction in the step (3), removing the supernatant, and drying the obtained precipitate to obtain the tellurium zinc molybdate modified by the silane coupling agent.
2. The high-modulus and high-toughness carbon fiber epoxy composite material of claim 1, wherein the ethanol is industrial ethanol with a mass fraction of 95%.
3. The high modulus, high toughness carbon fiber epoxy composite material of claim 1, wherein the silane coupling agent is KH560.
4. A method for preparing a high modulus, high toughness carbon fiber epoxy composite material according to any one of claims 1 to 3, comprising the steps of, in order: 1) Carrying out ultrasonic mixing treatment on tellurium zinc molybdate with the surface modified by a silane coupling agent and ethanol for 0.5-5 hours to obtain an ethanol solution of tellurium zinc molybdate with the surface modified by the silane coupling agent, and adding 0.01-20g of tellurium zinc molybdate with the surface modified by the silane coupling agent into each liter of ethanol; 2) Then adding epoxy resin into the ethanol solution of tellurium zinc molybdate with the surface modified by the silane coupling agent, stirring for 5-30 minutes, and then carrying out ultrasonic treatment for 0.5-5 hours to obtain a mixed solution, wherein the concentration of the epoxy resin in the mixed solution is 100-200g/L; 3) Then, the mixed solution obtained in the step 2) is put into an oven with the temperature of 50-80 ℃ to be baked for 10-48 hours, and then the ethanol solvent in the mixed solution is pumped out by a vacuum pump until the mixed solution has no bubbles; 4) Adding a stoichiometric amount of curing agent into the mixed solution in the step 3) according to the amount of the epoxy resin, stirring for 10-20 minutes at room temperature to obtain a mixture, and then extracting bubbles in the mixture until no bubbles are generated in the mixture; 5) And finally, placing more than 2 carbon fiber cloth layers in a composite mold, introducing the mixture obtained in the step 4) into the composite mold through a vacuum auxiliary resin transfer process to be compounded with each carbon fiber cloth layer, and curing to obtain the high-modulus and high-toughness carbon fiber epoxy composite material.
5. The method for preparing a high-modulus and high-toughness carbon fiber epoxy composite material according to claim 4, wherein the power of the ultrasonic treatment is 300-1000W.

Description

High-modulus and high-toughness carbon fiber epoxy composite material and preparation method thereof Technical Field The invention belongs to the field of preparation of polymer matrix composite materials, and particularly relates to a high-modulus and high-toughness carbon fiber epoxy composite material and a preparation method thereof. Background The carbon fiber epoxy composite material has the unique advantages of high specific strength and specific rigidity, strong designability, good fatigue fracture resistance, corrosion resistance, good structural dimensional stability and convenience for large-area integral molding, and is widely applied to various fields of national economy such as aerospace, sports equipment, automobiles and the like. However, the carbon fiber epoxy composite material still has the problem of insufficient toughness, and the modulus is not reduced or is difficult to improve while the toughness of the carbon fiber epoxy composite material is improved, because the conventional epoxy resin toughening agent tends to reduce the modulus of the material while toughening. Disclosure of Invention The invention relates to a high-modulus and high-toughness carbon fiber epoxy composite material and a preparation method thereof. The invention is realized by the following technical scheme: a high-modulus and high-toughness carbon fiber epoxy composite material comprises an epoxy resin matrix material and more than 2 carbon fiber cloth layers penetrating through the epoxy resin matrix material at intervals along the thickness direction of the epoxy resin matrix material; Tellurium zinc molybdate with the surface modified by a silane coupling agent is uniformly dispersed in the epoxy resin matrix material; the mass percentage of tellurium zinc molybdate with the surface modified by the silane coupling agent relative to the epoxy resin matrix material is 0.1-20%; the tellurium zinc molybdate with the surface treated by the silane coupling agent is prepared by the following method: (1) Uniformly grinding a mixture of polycrystal ZnTeMoO 6、TeO2 and MoO 3 in a molar ratio of 1:2-5:2-5, transferring the mixture into a crucible, placing the crucible at 500-700 ℃ for 2-3 days until a melt is uniform, cooling to room temperature, and grinding to obtain monocrystal ZnTeMoO6 powder; (2) Mixing and stirring a silane coupling agent and ethanol in a volume ratio of 1:10-20 for 1-2h, then adding the monocrystal ZnTeMoO 6 powder obtained in the step1, and carrying out ultrasonic treatment for 10-30min until the monocrystal ZnTeMoO 6 powder and the silane coupling agent are uniformly dispersed, wherein the mass ratio of the monocrystal ZnTeMoO 6 powder to the silane coupling agent is 100:1-3; (3) Placing the solution obtained in the step (2) into a water bath kettle with the temperature of 80-100 ℃ for heat preservation for 1-3 hours, and stirring at the speed of 100-1000 rpm in the heat preservation process; (4) And (3) naturally settling the product obtained after the reaction in the step (3), removing the supernatant, and drying the obtained precipitate to obtain the tellurium zinc molybdate modified by the silane coupling agent. Specifically, the ethanol is industrial ethanol with the mass fraction of 95%. Specifically, the silane coupling agent is KH560. The preparation method of the high-modulus and high-toughness carbon fiber epoxy composite material comprises the following steps in sequence: 1) Carrying out ultrasonic mixing treatment on tellurium zinc molybdate with the surface modified by a silane coupling agent and ethanol for 0.5-5 hours to obtain an ethanol solution of tellurium zinc molybdate with the surface modified by the silane coupling agent, and adding 0.01-20g of tellurium zinc molybdate with the surface modified by the silane coupling agent into each liter of ethanol; 2) Then adding epoxy resin into the ethanol solution of tellurium zinc molybdate with the surface modified by the silane coupling agent, stirring for 5-30 minutes, and then carrying out ultrasonic treatment for 0.5-5 hours to obtain a mixed solution, wherein the concentration of the epoxy resin in the mixed solution is 100-200g/L; 3) Then, the mixed solution obtained in the step 2) is put into an oven with the temperature of 50-80 ℃ to be baked for 10-48 hours, and then the ethanol solvent in the mixed solution is pumped out by a vacuum pump until the mixed solution has no bubbles; 4) Adding a stoichiometric amount of curing agent into the mixed solution in the step 3) according to the amount of the epoxy resin, stirring for 10-20 minutes at room temperature to obtain a mixture, and then extracting bubbles in the mixture until no bubbles are generated in the mixture; 5) And finally, placing more than 2 carbon fiber cloth layers in a composite mold, introducing the mixture obtained in the step 4) into the composite mold through a vacuum auxiliary resin transfer process to be compounded with each carbon fiber cloth layer, and cu