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CN-122013512-A - Self-lubricating fabric grey cloth and preparation method and application thereof, self-lubricating liner material and preparation method and application thereof, self-lubricating fabric composite material and preparation method and application thereof

CN122013512ACN 122013512 ACN122013512 ACN 122013512ACN-122013512-A

Abstract

The invention relates to the technical field of self-lubricating materials, in particular to self-lubricating fabric grey cloth, a preparation method and application thereof, a self-lubricating lining material, a preparation method and application thereof, a self-lubricating fabric composite material, and a preparation method and application thereof. The method comprises the steps of sequentially performing first twisting and first sizing on meta-aramid fibers to obtain pretreated meta-aramid fibers, sequentially performing second twisting and second sizing on polytetrafluoroethylene fibers to obtain pretreated polytetrafluoroethylene fibers, weaving the pretreated meta-aramid fibers and the pretreated polytetrafluoroethylene fibers to obtain fabric grey cloth, and sequentially performing dopamine-silane coupling agent modification on the fabric grey cloth to obtain self-lubricating fabric grey cloth. The self-lubricating fabric grey cloth prepared by the method based on the fabric pre-weaving treatment technology and the dopamine-silane coupling agent synergistic interface treatment technology has excellent bonding strength, excellent friction and wear performance under the working condition of a temperature change range of-55-230 ℃ and long service life.

Inventors

  • LI PEILONG
  • LIU WEIMIN
  • XU YANLEI
  • ZHANG ZHAOZHU
  • YANG MINGMING
  • LUO ZHIGANG
  • GAO XIANG
  • YUAN JUNYA
  • JIANG WEI
  • CAI MING

Assignees

  • 中国科学院兰州化学物理研究所
  • 中国航发哈尔滨轴承有限公司

Dates

Publication Date
20260512
Application Date
20260330

Claims (10)

  1. 1. The preparation method of the self-lubricating fabric grey cloth is characterized by comprising the following steps of: sequentially performing first twisting and first sizing on the meta-aramid fiber to obtain pretreated meta-aramid fiber; sequentially performing second twisting and second sizing on the polytetrafluoroethylene fibers to obtain pretreated polytetrafluoroethylene fibers; weaving the pretreated meta-aramid fiber and the pretreated polytetrafluoroethylene fiber to obtain a fabric gray fabric; And sequentially modifying the fabric grey cloth by using a dopamine-silane coupling agent to obtain the self-lubricating fabric grey cloth.
  2. 2. The method according to claim 1, wherein the meta-aramid fiber has a breaking strength of 4cN/dtex or more; The breaking strength of the polytetrafluoroethylene fiber is more than or equal to 1.2cN/dtex; the twist of the first twisting and the second twisting are independently 40-280 twists/m; The sizing agent used for the first sizing and the second sizing independently comprises 2-16% of modified polyester sizing agent, 2-16% of polyvinyl alcohol, 0.01-0.1% of defoaming agent, 0.01-0.1% of antistatic agent and the balance of water; The solid content of the modified polyester slurry is 27-33wt%, and the modified polyester in the modified polyester slurry comprises polyester resin; The structure of the fabric grey cloth comprises a structure cycle number of 2-6, a total tightness of 89-99.5, a warp tightness of 65-94 and a weft tightness of 70-83; the mass fraction of the aramid fiber at the middle position of the fabric grey cloth is 32-87%; the warp strength of the fabric grey cloth is greater than or equal to 1040N, and the weft strength of the fabric grey cloth is greater than or equal to 810N.
  3. 3. The method according to claim 1, wherein the dopamine-silane coupling agent modification comprises immersing the fabric blank in a dopamine aqueous solution for dopamine modification, and then immersing in a silane coupling agent solution for silane coupling agent modification; The concentration of the dopamine aqueous solution is 0.01-0.05 mol/L, and the dopamine modification time is 2-10 hours; The concentration of the silane coupling agent in the silane coupling agent solution is 2-8wt%, the solvent in the silane coupling agent solution comprises lower alcohol and water, the silane coupling agent comprises one or more of KH550, KH560 and KH570, and the modification time of the silane coupling agent is 1-3 h.
  4. 4. A self-lubricating fabric blank made by the method of any one of claims 1 to 3.
  5. 5. The self-lubricating textile fabric blank according to claim 4, wherein the self-lubricating textile fabric blank has a mass per unit area of 160-300 g/m 2 .
  6. 6. A self-lubricating mat material comprising the self-lubricating fabric blank of claim 5 or 6 and a resin supported in the self-lubricating fabric blank.
  7. 7. The method of preparing a self-lubricating liner material of claim 6 comprising the steps of: impregnating resin into the self-lubricating fabric grey cloth to obtain a gum-dipped fabric; And curing the gum dipping fabric to obtain the self-lubricating fabric composite material.
  8. 8. A self-lubricating fabric composite material is characterized by comprising a metal matrix and a self-lubricating liner material positioned on the surface of the matrix, wherein the self-lubricating liner material is the self-lubricating liner material according to claim 6 or the self-lubricating liner material prepared by the preparation method according to claim 7.
  9. 9. The method of preparing a self-lubricating textile composite material of claim 8, comprising the steps of: impregnating resin into the self-lubricating fabric grey cloth to obtain a gum-dipped fabric; Pre-curing the gum dipping fabric to obtain a pre-cured material; and (3) adhering the pre-cured material to the surface of the metal matrix, and curing to obtain the self-lubricating fabric composite material.
  10. 10. Use of the self-lubricating textile blank according to claim 4 or 5, the self-lubricating mat according to claim 6, the self-lubricating mat prepared by the preparation method according to claim 7, the self-lubricating textile composite according to claim 8 or the self-lubricating textile composite prepared by the preparation method according to claim 9 in a friction exercise mechanism.

Description

Self-lubricating fabric grey cloth and preparation method and application thereof, self-lubricating liner material and preparation method and application thereof, self-lubricating fabric composite material and preparation method and application thereof Technical Field The invention relates to the technical field of self-lubricating materials, in particular to self-lubricating fabric grey cloth, a preparation method and application thereof, a self-lubricating lining material, a preparation method and application thereof, a self-lubricating fabric composite material, and a preparation method and application thereof. Background The self-lubricating fabric composite material is a functional composite material with low friction, abrasion resistance and long service life, which is prepared by taking a fabric woven by high-performance fibers as a framework material and compounding the framework material with resin and filler. The self-lubricating fabric composite material is commonly used as mechanical parts such as rotation, swing, inching and the like in aviation equipment, heavy engineering machinery and marine equipment, and the tribological performance of the self-lubricating fabric composite material has great influence on the running state and stability of high-end equipment. At present, the method for improving the tribological performance of the self-lubricating fabric composite material is mainly focused on the aspects of fabric structural design, functional filler and resin matrix synthesis and the like. For example, related art discloses a self-lubricating fabric grey cloth of aramid fiber III/PTFE and a self-lubricating liner composite material, and the self-lubricating fabric grey cloth of a variable twill and variable satin structure is designed by taking aramid fiber III and PTFE as raw materials. However, the lining material has large abrasion and short service life in the working condition environment of a temperature range of-55 ℃ to 230 ℃. Disclosure of Invention In view of the above, the present invention aims to provide a self-lubricating fabric blank and a preparation method and application thereof, a self-lubricating lining material and a preparation method and application thereof, a self-lubricating fabric composite material and a preparation method and application thereof. The self-lubricating fabric grey cloth, the self-lubricating lining material and the self-lubricating fabric composite material provided by the invention have excellent tribological performance under the working condition of a temperature range of-55 ℃ to 230 ℃ and long service life. In order to achieve the above object, the present invention provides the following technical solutions: the invention provides a preparation method of self-lubricating fabric grey cloth, which comprises the following steps: sequentially performing first twisting and first sizing on the meta-aramid fiber to obtain pretreated meta-aramid fiber; sequentially performing second twisting and second sizing on the polytetrafluoroethylene fibers to obtain pretreated polytetrafluoroethylene fibers; weaving the pretreated meta-aramid fiber and the pretreated polytetrafluoroethylene fiber to obtain a fabric gray fabric; And sequentially modifying the fabric grey cloth by using a dopamine-silane coupling agent to obtain the self-lubricating fabric grey cloth. Preferably, the breaking strength of the meta-aramid fiber is more than or equal to 4cN/dtex; The breaking strength of the polytetrafluoroethylene fiber is more than or equal to 1.2cN/dtex; the twist of the first twisting and the second twisting are independently 40-280 twists/m; The sizing agent used for the first sizing and the second sizing independently comprises 2-16% of modified polyester sizing agent, 2-16% of polyvinyl alcohol, 0.01-0.1% of defoaming agent, 0.01-0.1% of antistatic agent and the balance of water; The solid content of the modified polyester slurry is 27-33wt%, and the modified polyester in the modified polyester slurry comprises polyester resin; The structure of the fabric grey cloth comprises a structure cycle number of 2-6, a total tightness of 89-99.5, a warp tightness of 65-94 and a weft tightness of 70-83; the mass fraction of the aramid fiber at the middle position of the fabric grey cloth is 32-87%; the warp strength of the fabric grey cloth is greater than or equal to 1040N, and the weft strength of the fabric grey cloth is greater than or equal to 810N. Preferably, the dopamine-silane coupling agent modification comprises the steps of immersing the fabric grey cloth into a dopamine aqueous solution for dopamine modification, and then immersing the fabric grey cloth into a silane coupling agent solution for silane coupling agent modification; the concentration of the dopamine aqueous solution is 0.01-0.05 mol/L, the pH value is 8-8.5, and the dopamine modification time is 2-10 hours; The concentration of the silane coupling agent in the silane coupling agent solution