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CN-122011724-A - High-wear-resistance PEEK composite material and preparation method thereof

CN122011724ACN 122011724 ACN122011724 ACN 122011724ACN-122011724-A

Abstract

The invention discloses a high-wear-resistance PEEK composite material and a preparation method thereof, which belong to the technical field of material science, and the high-wear-resistance PEEK composite material comprises the following raw materials in parts by weight: 25-30 parts of polyether-ether-ketone powder, 47-52 parts of PEEK-BN, 13-18 parts of polytetrafluoroethylene powder and 5-10 parts of MoS 2 sulfonated polyether-ether-ketone composite material. Mixing the raw materials, adopting a mechanical blending mode to uniformly mix, ball-milling and blending, pouring the mixture into a mould after blending, and prepressing and hot-pressing to form to obtain the high-wear-resistance PEEK composite material. The MoS 2 sulfonated polyether-ether-ketone composite material is obtained by forming a uniform coating layer on the surface of the sulfonated polyether-ether-ketone by electrostatic self-assembly of the MoS 2 nano sheet, and the wear resistance of the PEEK composite material is improved by the cooperation of the PEEK-BN and the hydroxylated boron nitride nano sheet.

Inventors

  • WANG XIAOYONG

Assignees

  • 安徽赛诺新材料科技有限公司

Dates

Publication Date
20260512
Application Date
20260213

Claims (10)

  1. 1. The high wear-resistant PEEK composite material is characterized by comprising, by weight, 25-30 parts of polyether-ether-ketone powder, 47-52 parts of PEEK-BN, 13-18 parts of polytetrafluoroethylene powder and 5-10 parts of MoS 2 sulfonated polyether-ether-ketone composite material.
  2. 2. The high wear resistant PEEK composite according to claim 1, wherein the PEEK-BN is prepared by: Mixing a hydroxylated boron nitride nanosheet, hydroxyl-terminated hyperbranched polysiloxane, hydroquinone, 4' -difluorobenzophenone and diphenyl sulfone, stirring under the protection of nitrogen, adding toluene, calcium carbonate and potassium carbonate, heating to 125-130 ℃ after the addition, carrying out heat preservation reaction for 4-5h, heating to 300-320 ℃ and carrying out heat preservation reaction continuously to obtain PEEK-BN.
  3. 3. The high wear-resistant PEEK composite material according to claim 2, wherein the addition amount of hydroxyl-terminated hyperbranched polysiloxane is 4% -6% of the mass of the hydroxylated boron nitride nano-sheets, and the mass fraction of the hydroxylated boron nitride nano-sheets in PEEK-BN is 5% -10%.
  4. 4. The highly abrasion resistant PEEK composite according to claim 1, wherein the hydroxyl terminated hyperbranched polysiloxane is prepared by: Under the protection of nitrogen, mixing and reacting tetraethoxysilane, dihydric alcohol and p-toluenesulfonic acid to obtain the hydroxyl-terminated hyperbranched polysiloxane.
  5. 5. The high wear-resistant PEEK composite material according to claim 4, wherein the dosage ratio of the ethyl orthosilicate to the dihydric alcohol is 1mol:3.5-4mol, and the addition amount of the p-toluenesulfonic acid is 0.5% of the mass of the ethyl orthosilicate.
  6. 6. The high wear resistant PEEK composite of claim 4, wherein the glycol is one of 1, 2-hexanediol, 1, 2-pentanediol, and neopentyl glycol.
  7. 7. The high wear resistant PEEK composite of claim 1, wherein the MoS 2 sulfonated polyetheretherketone composite is prepared by: adding molybdenum disulfide nanosheets into hexadecyl trimethyl ammonium bromide solution for ultrasonic dispersion, and obtaining CTAB-MoS 2 through centrifugal separation and drying; Adding CTAB-MoS 2 into water to prepare dispersion liquid, then adding sulfonated polyether-ether-ketone powder, stirring for 1-3h at room temperature, performing solid-liquid separation, washing with water, and drying to obtain MoS 2 sulfonated polyether-ether-ketone composite material.
  8. 8. The high wear-resistant PEEK composite material according to claim 7, wherein the mass fraction of MoS 2 in the MoS 2 sulfonated polyether-ether-ketone composite material is 40% -60%, and the sulfonation degree of the sulfonated polyether-ether-ketone is 5% -15%.
  9. 9. A method for preparing the high wear-resistant PEEK composite material, which is used for preparing the high wear-resistant PEEK composite material according to any one of claims 1 to 8, and is characterized by comprising the following steps: mixing the raw materials, adopting a mechanical blending mode to uniformly mix, ball-milling and blending, pouring the mixture into a mould after blending, and prepressing and hot-pressing to form to obtain the high-wear-resistance PEEK composite material.
  10. 10. The preparation method of the high wear-resistant PEEK composite material according to claim 9, which is characterized by comprising the steps of mechanically blending, wherein ball milling and blending are carried out at a rotating speed of 400-500r/min for 150-180min; The pre-pressing condition is that the pressure is set to 3-5MPa and the time is 1-5min; The hot press molding condition is that the temperature is 360-380 ℃, the pressure is 10-15MPa, and the pressure is maintained for 50-80min.

Description

High-wear-resistance PEEK composite material and preparation method thereof Technical Field The invention belongs to the technical field of material science, and particularly relates to a high-wear-resistance PEEK composite material and a preparation method thereof. Background Polyether ether ketone (Polyetherether Ketone, PEEK for short) refers to a linear polymer with a macromolecular main chain composed of aryl groups, ketone bonds and ether bonds. As a semi-crystalline aromatic thermoplastic engineering plastic, PEEK has the remarkable characteristics of excellent dimensional stability, strong radiation resistance, high toughness, easiness in extrusion and injection molding, excellent processability and higher molding efficiency. Owing to the excellent comprehensive properties, PEEK materials are widely applied to the high-tech fields of automobile industry, precision instruments, aerospace, chemical industry, medical instruments, electronic appliances and the like. However, with the continuous advancement of the industrialization process, the problems of equipment failure and economic loss caused by the phenomenon of friction and abrasion are increasingly prominent in national economic pillar industries such as metallurgy, machining, petrochemical industry, transportation, aerospace, precision instrument manufacturing and the like. Specifically, performance degradation and frequent replacement of key parts of mechanical equipment caused by friction and abrasion in the long-term operation process not only obviously increase equipment maintenance cost, but also restrict popularization and application of part of advanced mechanical equipment and high-end manufacturing technology. In addition, the wear resistance of the polyether-ether-ketone material with a single component under the dry friction working condition is limited, and the severe requirement on the multifunctional characteristics of the material under the complex service environment is difficult to meet, so that the application range and depth of the PEEK material are limited to a certain extent. In order to improve the tribological performance of the PEEK material, polytetrafluoroethylene (PTFE), inorganic nano-fillers and the like are generally adopted in the prior art to modify the PEEK matrix. The PTFE particles are filled into the polytetrafluoroethylene matrix, so that the wear resistance of the composite material can be remarkably improved on the basis of keeping the excellent performance of PTFE, and a small amount of nano-scale particles are filled into the polymer matrix, so that the wear resistance of the composite material can be improved while keeping the excellent performance of the matrix by utilizing the small size effect and the surface effect of the nano-scale particles. Nanoscale particles are regarded as effective reinforcing phases due to their small size effect and surface effect, and can significantly improve the abrasion resistance of polymers at lower addition levels. However, the fillers still face a plurality of key problems in practical application, namely, firstly, the nano fillers have large specific surface area and high surface energy, agglomeration is easy to occur in a polymer matrix, uniform dispersion is difficult to realize, and the agglomeration of the fillers can lead to the formation of stress concentration points in the composite material, cause uneven performance distribution and seriously weaken the corresponding reinforcing effect of the matrix. Secondly, the addition amount of the filler has obvious range sensitivity that the excessive filling can damage the continuity of the PEEK matrix, weaken the interface bonding strength, simultaneously the hard filler is easy to fall off in the friction process to form abrasive dust with larger size, and the abrasive dust has obvious plough action on the friction interface and accelerates the abrasion of materials. In addition, in the friction process, part of filler particles are debonded and fall off due to weaker combination with a matrix interface, and falling abrasive dust enters the contact surface, so that mechanical interlocking and friction resistance of the interface can be increased, the surface of a material and a mating part can be further damaged through a furrow effect, and particularly when filler is unevenly dispersed, an aggregate is easier to fall off under the shearing action, and the abrasion process is further increased. Disclosure of Invention The invention aims to provide a high-wear-resistance PEEK composite material and a preparation method thereof, so as to solve the problem of poor wear resistance of the PEEK composite material. The aim of the invention can be achieved by the following technical scheme: The invention provides a high-wear-resistance PEEK composite material, which comprises, by weight, 25-30 parts of polyether-ether-ketone powder, 47-52 parts of PEEK-BN, 13-18 parts of polytetrafluoroethylene powder and 5-10 parts of M