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UiO-66-(COOH) 2/dopamine synergistically modified carbon fiber reinforced paper-based friction material and preparation method thereof

A paper-based friction material, uio-66-technology, applied in the direction of synthetic cellulose/non-cellulose material pulp/paper, carbon fiber, fiber raw material processing, etc., can solve problems such as no research, and achieve the effect of improving friction and wear performance

Active Publication Date: 2022-02-08
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, using UiO-66-(COOH) 2 / Dopamine synergistic modification of carbon fiber reinforced paper-based friction materials, etc. There is no relevant research

Method used

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  • UiO-66-(COOH) 2/dopamine synergistically modified carbon fiber reinforced paper-based friction material and preparation method thereof
  • UiO-66-(COOH) 2/dopamine synergistically modified carbon fiber reinforced paper-based friction material and preparation method thereof

Examples

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Effect test

preparation example Construction

[0042] see figure 1 , a UiO-66-(COOH) 2 / Dopamine synergistically modified carbon fiber reinforced paper-based friction material and a preparation method thereof, comprising the following steps:

[0043] Step 1: Take 15g of carbon fiber and soak it in acetone for 12-48 hours to remove the sizing agent and other impurities on the surface of the fiber. After completion, rinse it with deionized water for 3-5 times and dry it in an oven at a temperature of 80-150°C for 12-48 hours. , drying to obtain carbon fiber I with a clean surface;

[0044] Step 2: Dissolve 1.0-2.5 g of tris (Tris buffer) in 0.97-1.45 L of deionized water at room temperature and stir magnetically to obtain solution A, then dissolve 1.6-2.8 g of dopamine in 0.03 ~0.05L deionized water, conduct ultrasonic dispersion to obtain solution B;

[0045] Step 3: Use hydrochloric acid to adjust the pH of solution A to 8-10. During the continuous magnetic stirring process, the magnetic stirring rotation speed is 1000-...

Embodiment 1

[0053] Example 1 is a blank paper-based friction material that does not use modified carbon fibers in the prior art

[0054] Step 1: Decompose carbon fiber, aramid fiber and pulp fiber to form a fiber mixture, the mass ratio of carbon fiber, aramid fiber, pulp fiber and filler is 1.3:1.2:1.3:3.0, and add fillers including molybdenum disulfide and mica Powder, diatomaceous earth and kaolin, the wet samples were prepared by the principle of vacuum filtration and pulping and papermaking, and dried in an oven at a temperature of 55 ° C for 5 hours to obtain dry samples for later use;

[0055] Step 2: Impregnate the dry sample obtained in Step 1 in the modified phenolic resin with an impregnation concentration of 20%. After completion, dry it at room temperature and perform hot-press curing treatment. The hot-press temperature is 130°C, the curing time is 8 minutes, and the pressure is 10Pa. Thus a blank paper-based friction material was obtained.

Embodiment 2

[0057] Step 1: Take 15g of carbon fiber and soak it in acetone for 24 hours to remove the sizing agent and other impurities on the surface of the fiber. After the completion, rinse it with deionized water for 3 times, and dry it in an oven at a temperature of 120°C for 48 hours to obtain a carbon fiber with a clean surface. I;

[0058] Step 2: Dissolve 1.5g of tris (Tris buffer) in 0.97L of deionized water at room temperature, and perform magnetic stirring to obtain solution A, then dissolve 2.0g of dopamine in 0.03L of deionized water, and carry out Ultrasonic dispersion to obtain solution B;

[0059] Step 3: Use hydrochloric acid to adjust the pH of solution A to 9. During the continuous magnetic stirring process, the magnetic stirring rotation speed is 1300r, pour solution B into solution A, and make it fully mixed. Put the carbon fiber I obtained in step 1 into the above mixed solution, stir at room temperature, and dry in an oven after the reaction is completed at a temp...

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Abstract

The invention relates to a UiO-66-(COOH) 2 / dopamine synergistically modified carbon fiber reinforced paper-based friction material and a preparation method thereof. The preparation method comprises the steps that carbon fibers with clean surfaces are sequentially placed in trihydroxymethyl aminomethane (Tris buffer solution) and a dopamine solution, and a high-adhesion dopamine flexible film grows and wraps the surfaces of the carbon fibers; then, based on a hydrothermal reaction, a UiO-66-(COOH) 2 crystal layer grows on the surface of the carbon fiber in situ, and after the reaction is completed, the modified carbon fiber is fully washed and dried. An interface structure is constructed and reinforced by adopting the bi-component modified carbon fibers and a resin matrix, and the UiO-66-(COOH) 2 / dopamine synergistically modified carbon fiber reinforced paper-based friction material is prepared. The dynamic friction coefficient of the UiO-66-(COOH) 2 / dopamine synergistically modified carbon fiber reinforced paper-based friction material prepared by the preparation method disclosed by the invention is increased to 0.1353 from 0.1044, and the amplification is 29.60%. The wear rate is reduced from 3.35 * 10 <-8 > cm < 3 >. J <-1 > to 2.65 * 10 <-8 > cm < 3 >. J <-1 >, and the reduction amplitude is 20.89%. The result shows that the UiO-66-(COOH) 2 / dopamine synergistically modifies and reinforces the material interface structure, and the friction and wear performance of the paper-based friction material can be remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of wet friction materials, and relates to a UiO-66-(COOH) 2 / Dopamine synergistically modified carbon fiber reinforced paper-based friction material and its preparation method. Background technique [0002] Paper-based friction materials can be widely used as engineering materials in vehicles, construction machinery, machine tools, ships and other industries under oil-lubricated conditions. Therefore, high-strength and wear-resistant fibers are needed to further improve the performance of paper-based friction materials. Due to the advantages of high strength and high modulus, light weight and good wear resistance, carbon fiber is often used in the preparation process of paper-based friction materials. However, the surface of carbon fiber is smooth and chemically inert, showing a turbostratic graphite structure, which makes it difficult to form a good and effective interfacial bond with the resin matrix, res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/00D21H13/50D21H13/26D21H11/00D21H17/67D21H17/00D21H17/68D06M13/368D06M15/37D06M101/40
CPCD21H27/00D21H13/50D21H13/26D21H11/00D21H17/67D21H17/00D21H17/675D21H17/68D06M13/368D06M15/37D06M2101/40D06M2200/35
Inventor 李贺军马珊珊费杰齐乐华
Owner NORTHWESTERN POLYTECHNICAL UNIV
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