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CN-121991482-A - Aging-resistant PEEK modified material and preparation method thereof

CN121991482ACN 121991482 ACN121991482 ACN 121991482ACN-121991482-A

Abstract

The invention discloses an aging-resistant PEEK modified material and a preparation method thereof, and belongs to the technical field of PEEK modified materials, wherein the aging-resistant PEEK modified material comprises, by weight, 100 parts of polyether-ether-ketone, 10-15 parts of polytetrafluoroethylene and 10-20 parts of modified glass fiber loaded zinc oxide; the preparation raw materials of the modified glass fiber loaded zinc oxide comprise glass fiber loaded zinc oxide, 3- (azidopropyl) triethoxysilane, 3,4, 5-trihydroxy-N- (prop-2-yn-1-yl) benzamide, fluoroalkyl-substituted propargyl compounds and soluble shirt salts. The PEEK modified material is prepared by blending the PEEK, the polytetrafluoroethylene and the modified glass fiber loaded zinc oxide, and the PEEK modified material is used for preparing a sealing material, so that the ageing resistance is further improved on the basis of keeping good mechanical properties, and meanwhile, the tribological properties and the toughness of the PEEK modified material can be effectively improved.

Inventors

  • WANG XIAOYONG

Assignees

  • 安徽赛诺新材料科技有限公司

Dates

Publication Date
20260508
Application Date
20260213

Claims (10)

  1. 1. The aging-resistant PEEK modified material is characterized by comprising the following raw materials in parts by weight: 100 parts of polyether-ether-ketone, 10-15 parts of polytetrafluoroethylene and 10-20 parts of modified glass fiber loaded zinc oxide; The modified glass fiber loaded zinc oxide is glass fiber loaded zinc oxide the surface of which is subjected to chemical grafting and rare earth ion chelation.
  2. 2. The aging-resistant PEEK modified material according to claim 1, wherein the modified glass fiber-supported zinc oxide preparation raw materials comprise glass fiber-supported zinc oxide, 3- (azidopropyl) triethoxysilane, 3,4, 5-trihydroxy-N- (prop-2-yn-1-yl) benzamide, fluoroalkyl-substituted propargyl compounds and soluble shirt salts.
  3. 3. An aging resistant PEEK modification material according to claim 2, wherein said fluoroalkyl substituted propargyl compound is 1H-perfluorooct-1-yne and/or 2, 2-trifluoroethyl propargyl carbonate.
  4. 4. The aging resistant PEEK modified material of claim 2, wherein said soluble salt is at least one of samarium nitrate hexahydrate, samarium chloride hexahydrate, and samarium nitrate hexahydrate.
  5. 5. The aging-resistant PEEK modified material according to claim 1 or 2, wherein the modified glass fiber-loaded zinc oxide is prepared by the steps of: S1, adding 3- (azidopropyl) triethoxysilane into an ethanol solution, uniformly stirring, adjusting the pH to 4-5 with acetic acid, adding glass fiber loaded zinc oxide, stirring at 60-80 ℃ for 12 hours, filtering, washing a filter cake with deionized water, and drying to obtain the azidated glass fiber loaded zinc oxide; S2, ultrasonically dispersing zinc oxide loaded on the azide glass fiber into N, N-dimethylformamide, then adding 3,4, 5-trihydroxy-N- (prop-2-yn-1-yl) benzamide, fluoroalkyl substituted propargyl compound and copper iodide, uniformly stirring and reacting for 6-12 hours at 60-80 ℃, filtering after the reaction is finished, washing and drying a filter cake to obtain cyclized glass fiber loaded zinc oxide; S3, uniformly mixing cyclized glass fiber loaded zinc oxide, absolute ethyl alcohol and deionized water by ultrasonic, adding soluble shirt salt, heating to 70-80 ℃, stirring and reacting for 8-16 hours, filtering after the reaction is finished, washing a filter cake with deionized water, and drying to obtain the modified glass fiber loaded zinc oxide.
  6. 6. The aging-resistant PEEK modified material according to claim 5, wherein the dosage ratio of 3- (azidopropyl) triethoxysilane, ethanol solution and glass fiber-supported zinc oxide in S1 is 1-3g:150-200mL:10g, and the mass fraction of the ethanol solution is 80-95%.
  7. 7. The aging-resistant PEEK modified material according to claim 5, wherein the amount ratio of zinc oxide, N-dimethylformamide, 3,4, 5-trihydroxy-N- (prop-2-yn-1-yl) benzamide, fluoroalkyl-substituted propargyl compound and copper iodide loaded on the azide glass fiber in S2 is 10g:200-300mL:1.2-2.0mmol:0.8-1.3mmol:0.05-0.15mmol.
  8. 8. The aging-resistant PEEK modified material according to claim 5, wherein the dosage ratio of the zinc oxide loaded on the cyclic glass fiber, the absolute ethyl alcohol, the deionized water and the soluble shirt salt in S3 is 10g:150-200mL:50-100mL:1-3mmol.
  9. 9. The aging-resistant PEEK modified material according to claim 5, wherein the glass fiber loaded zinc oxide is a composite with glass fibers as a substrate and nano zinc oxide grown on the surface of the glass fibers in situ.
  10. 10. A method for preparing the aging-resistant PEEK modified material, which is characterized by comprising the following steps of: and uniformly mixing polyether-ether-ketone, polytetrafluoroethylene and modified glass fiber loaded zinc oxide according to the formula proportion.

Description

Aging-resistant PEEK modified material and preparation method thereof Technical Field The invention belongs to the technical field of PEEK modified materials, and particularly relates to an aging-resistant PEEK modified material and a preparation method thereof. Background Polyether ether ketone (PEEK) is used as a special engineering material, has high strength, high modulus, stable insulation, high fracture toughness and excellent dimensional stability, and the properties enable the PEEK to be an ideal candidate material for key sealing parts (such as sealing rings, bearings, piston rings and valve seats) in the fields of petrochemical industry, aerospace, automobile manufacturing, rail transit and the like, and can replace part of metal under extreme working conditions, so that the weight reduction and the high performance are realized. In sealing applications, the operating conditions can be divided into static and dynamic seals. The static sealing element and the matching part are relatively static, and the working condition is relatively mild. While PEEK is used in dynamic seal scenarios (e.g., high-speed rotary shaft seals, reciprocating seals), the aging failure mechanisms it faces become extremely complex and severe. In the high-speed and high-load friction process, the sealing contact area generates remarkable friction heat, so that the local temperature is rapidly increased, a series of synergistic aging effects are caused by the thermal-mechanical coupling action, wherein the mechanical strength and the wear resistance of the surface material are reduced by the oxidative degradation of the surface material, so that the wear is further increased, the new surface and more friction heat are generated by the wear, and the oxidation aging process is further catalyzed, so that a vicious circle which causes the rapid failure of the sealing is formed. Therefore, aiming at severe applications such as dynamic sealing, the development of PEEK modified materials with long-acting aging resistance is of great significance. At present, a general technical means for improving the ageing resistance of a polymer material is to add a small molecular antioxidant or an anti-ageing agent, however, in the long-term high-temperature use or thermal processing process of PEEK, the auxiliary agents are easy to migrate to the surface of the material through diffusion and separate out. The precipitate not only causes pollution of a sealing interface and influences sealing performance, but also causes continuous loss of anti-aging components in the material, so that long-acting stable protection is not from beginning. Inorganic anti-aging fillers (e.g., zinc oxide) can theoretically circumvent the above drawbacks by virtue of the intrinsic thermo-oxidative stability and non-migration properties. However, when the inorganic particles are directly introduced into a PEEK system, the inorganic particles and the organic matrix are subjected to polarity mismatch to cause uneven dispersion, and the interface combination is weak to cause poor mechanical properties of the final sealing material. In sum, the problem of poor compatibility of inorganic anti-aging filler and PEEK system is solved, and the anti-aging PEEK material suitable for severe dynamic sealing working conditions is provided. Disclosure of Invention The invention aims to provide an aging-resistant PEEK modified material and a preparation method thereof, which are used for solving the problem of poor compatibility between an inorganic aging-resistant filler and a PEEK system in the prior art, thereby providing a PEEK material with long-acting and stable aging-resistant performance for severe working conditions such as dynamic sealing and the like. The aim of the invention can be achieved by the following technical scheme: an aging-resistant PEEK modified material comprises the following raw materials in parts by weight: 100 parts of polyether-ether-ketone, 10-15 parts of polytetrafluoroethylene and 10-20 parts of modified glass fiber loaded zinc oxide. The modified glass fiber loaded zinc oxide is glass fiber loaded zinc oxide the surface of which is subjected to chemical grafting and rare earth ion chelation. Further, the preparation raw materials of the modified glass fiber loaded zinc oxide comprise glass fiber loaded zinc oxide, 3- (azidopropyl) triethoxysilane, 3,4, 5-trihydroxy-N- (prop-2-yn-1-yl) benzamide, fluoroalkyl substituted propargyl compounds and soluble shirt salts. Further, the fluoroalkyl substituted propargyl compound is 1H-perfluorooct-1-yne and/or 2, 2-trifluoroethyl propargyl carbonate. Further, the soluble shirt salt is at least one of samarium nitrate hexahydrate [ Sm (NO 3)3·6H2 O), samarium chloride hexahydrate [ SmCl 2·6H2 O ] and samarium nitrate hexahydrate [ Sm (NO 3)3·6H2 O ]. Further, the preparation method of the modified glass fiber loaded zinc oxide comprises the following steps: S1, adding 3- (azidopropyl) triethoxysilane into an et