Search

CN-121975168-A - Polymer-based composite material and preparation method thereof

CN121975168ACN 121975168 ACN121975168 ACN 121975168ACN-121975168-A

Abstract

The application provides a polymer matrix composite and a preparation method thereof, wherein the preparation method comprises the following steps of mixing carbon fiber, graphene and phenolic resin in water to obtain a mixed solution; filtering the mixed solution until no water drops are separated out, performing hot pressing solidification to obtain a composite heat-conducting filler, soaking a polymer matrix in the composite heat-conducting filler by vacuum auxiliary soaking, and performing hot pressing molding to obtain the polymer matrix composite material. The polymer matrix composite has good heat conduction performance.

Inventors

  • WU XINFENG
  • REN CHAOQUN
  • Xiang Lixue
  • TANG BO

Assignees

  • 诸暨市幄肯中智新材料有限公司

Dates

Publication Date
20260505
Application Date
20260203

Claims (10)

  1. 1. A method of preparing a polymer matrix composite, comprising the steps of: Mixing carbon fiber, graphene and phenolic resin in water to obtain a mixed solution; filtering the mixed solution until no water drops are separated out, and performing hot pressing solidification to obtain a composite heat-conducting filler; And impregnating a polymer matrix in the composite heat-conducting filler by vacuum auxiliary impregnation, and performing hot press molding to obtain the polymer matrix composite material.
  2. 2. The method of preparing a polymer matrix composite according to claim 1, wherein the carbon fiber, graphene and phenolic resin are mixed in water, comprising the steps of: Performing first ultrasonic dispersion on carbon fibers and graphene in water to obtain carbon fiber-graphene dispersion liquid; And mixing phenolic resin with the carbon fiber-graphene dispersion liquid for second ultrasonic dispersion to obtain the mixed liquid.
  3. 3. The method for preparing the polymer matrix composite according to claim 2, wherein the time of the first ultrasonic dispersion is 15 min-35 min, and the ultrasonic power of the first ultrasonic dispersion is 60 w-120 w; And/or the second ultrasonic dispersion time is 15-35 min, and the ultrasonic power of the second ultrasonic dispersion is 60-120W.
  4. 4. The method for producing a polymer-based composite material according to any one of claims 1 to 3, wherein the carbon fiber has a length of 240 μm to 260 μm.
  5. 5. The method for preparing a polymer matrix composite according to any one of claims 1 to 3, wherein the temperature of the thermocompression curing is 170 ℃ to 190 ℃, and the time of the thermocompression curing is 1.5h to 2.5h.
  6. 6. The method for preparing a polymer matrix composite according to any one of claims 1 to 3, wherein the vacuum-assisted impregnation temperature is 20 ℃ to 30 ℃, the vacuum degree is-70 kPa to-100 kPa, and the impregnation times are 2 times to 3 times.
  7. 7. The method for preparing a polymer matrix composite according to any one of claims 1 to 3, wherein the hot press molding temperature is 170 ℃ to 190 ℃ and the time is 1.5h to 2.5h.
  8. 8. The method for preparing a polymer matrix composite according to any one of claims 1 to 3, wherein the polymer matrix comprises an epoxy resin and a curing agent, and the mass ratio of the epoxy resin to the curing agent is 100 (70 to 90).
  9. 9. A polymer matrix composite, characterized in that it is prepared by the method for preparing a polymer matrix composite according to any one of claims 1 to 8.
  10. 10. The polymer matrix composite according to claim 9, wherein the mass fraction of carbon fibers is 35% -40%, the mass fraction of graphene is 0.15% -1% and the mass fraction of phenolic resin is 18% -20% based on the total mass of the polymer matrix composite.

Description

Polymer-based composite material and preparation method thereof Technical Field The application relates to the technical field of polymer composite materials, in particular to a polymer matrix composite material and a preparation method thereof. Background With the rapid development of 5G and third generation semiconductor technologies, electronic devices are continuously advanced to high integration and miniaturization, and the problem of heat dissipation has become a key bottleneck for limiting the performance and the service life of devices. Traditional heat conducting materials are difficult to meet the increasing thermal management demands, and development of novel efficient heat conducting materials is important. The polymer matrix composite is an ideal choice for solving the heat dissipation problem due to its good processability, corrosion resistance and designable high heat conducting properties. However, polymers rely primarily on lattice vibrational heat transfer and have poor intrinsic thermal conductivity. The traditional method for improving the heat conducting capacity of the polymer is to add high heat conducting filler such as carbon material, metal or ceramic particles and the like into the polymer by a blending method. The blending method has simple process and low cost, but the filler can cause the viscosity to rise and the interface thermal resistance to be increased, but the heat conduction property is limited. Therefore, how to effectively improve the heat conducting property of the polymer matrix composite is the current research focus. Disclosure of Invention Based on the above, the application provides a polymer matrix composite material with good heat conduction performance and a preparation method thereof. The technical scheme provided by the application is as follows: According to a first aspect of the present application there is provided a method of preparing a polymer matrix composite comprising the steps of: Mixing carbon fiber, graphene and phenolic resin in water to obtain a mixed solution; filtering the mixed solution until no water drops are separated out, and performing hot pressing solidification to obtain a composite heat-conducting filler; And impregnating a polymer matrix in the composite heat-conducting filler by vacuum auxiliary impregnation, and performing hot press molding to obtain the polymer matrix composite material. In some embodiments, carbon fiber, graphene, and phenolic resin are mixed in water, comprising the steps of: Performing first ultrasonic dispersion on carbon fibers and graphene in water to obtain carbon fiber-graphene dispersion liquid; And mixing phenolic resin with the carbon fiber-graphene dispersion liquid for second ultrasonic dispersion to obtain the mixed liquid. In some embodiments, the time of the first ultrasonic dispersion is 15 min-35 min, and the ultrasonic power of the first ultrasonic dispersion is 60 w-120 w. In some embodiments, the second ultrasonic dispersion time is 15 min-35 min, and the ultrasonic power of the second ultrasonic dispersion is 60 w-120 w. In some embodiments, the carbon fibers have a length of 240 μm to 260 μm. In some embodiments, the temperature of the thermal press curing is 170 ℃ to 190 ℃, and the time of the thermal press curing is 1.5h to 2.5h. In some embodiments, the temperature of the vacuum-assisted impregnation is 20-30 ℃, the vacuum degree is-70 kPa-100 kPa, and the impregnation times are 2-3 times. In some embodiments, the hot press forming temperature is 170 ℃ to 190 ℃ and the time is 1.5h to 2.5h. In some embodiments, the polymer matrix comprises an epoxy resin and a curing agent, wherein the mass ratio of the epoxy resin to the curing agent is 100 (70-90). According to a second aspect of the present application there is provided a polymer matrix composite prepared by the method of preparing a polymer matrix composite according to the first aspect of the present application. In some embodiments, the mass fraction of carbon fibers is 35% -40%, the mass fraction of graphene is 0.15% -1%, and the mass fraction of phenolic resin is 18% -20% based on the total mass of the polymer matrix composite. Compared with the prior art, the application has at least the following beneficial effects: The preparation method of the polymer matrix composite material comprises the steps of mixing carbon fibers, graphene and phenolic resin, carrying out suction filtration, carrying out hot press solidification to form a composite heat-conducting filler, then impregnating a polymer matrix in the composite heat-conducting filler by vacuum auxiliary impregnation, and carrying out hot press molding to obtain the polymer matrix composite material. The carbon fiber and the graphene have extremely high intrinsic heat conductivity, the heat conductivity is far higher than that of the polymer matrix, and the carbon fiber and the graphene can be used as high-efficiency heat conduction reinforcing phases to directly improve th