MOF-5/dopamine double-effect enhanced paper-based friction material and preparation method thereof

A paper-based friction material, MOF-5 technology, applied in the direction of synthetic cellulose/non-cellulose material pulp/paper, special paper, natural cellulose pulp/paper, etc., can solve the problems of no related research and achieve improved friction Effects of wear performance, increase in effective contact area, and promotion of compatibility

Pending Publication Date: 2022-02-25
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no relevant research on the use of MOF-5 and dopamine to enhance paper-based friction materials.

Method used

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  • MOF-5/dopamine double-effect enhanced paper-based friction material and preparation method thereof
  • MOF-5/dopamine double-effect enhanced paper-based friction material and preparation method thereof
  • MOF-5/dopamine double-effect enhanced paper-based friction material and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0055] see figure 1 , a MOF-5 / dopamine dual-effect reinforced paper-based friction material and a preparation method thereof, comprising the following steps:

[0056] 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 12-24 hours. , drying to obtain carbon fiber I with a clean surface;

[0057] Step 2: Dissolve 1.0 to 2.0 g of tris (Tris buffer) in 0.97 to 1.45 L of deionized water at room temperature and stir magnetically to obtain solution A, then dissolve 1.8 to 2.2 g of dopamine in 0.03 ~0.05L deionized water, conduct ultrasonic dispersion to obtain solution B;

[0058] Step 3: Use hydrochloric acid to adjust the pH of solution A to 8-9. During the continuous magnetic stirring process, the magnetic stirring rotation speed is 1000-1500r, pour solution B into so...

Embodiment 1

[0066] Example 1 Blank example and blank paper-based friction material without carbon fiber modification in the prior art

[0067] 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 1.2:1.0:1.3:3.0. Add fillers including barium sulfate, graphite, Al2O3 and talcum powder were used to prepare wet samples through the principle of vacuum filtration and pulping and papermaking, and dried in an oven at a temperature of 75°C for 4 hours to obtain dry samples for later use;

[0068]Step 2: Impregnate the dry sample obtained in Step 1 in the modified phenolic resin with an impregnation concentration of 20%. After completion, it is dried at room temperature and cured by hot pressing at a temperature of 150°C, a curing time of 5 minutes, and a pressure of 15 Pa. Thus a blank paper-based friction material was obtained.

Embodiment 2

[0071] 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 completion, rinse it with deionized water for 3 times and dry it in an oven at 80°C for 12 hours. Dry to obtain carbon fiber with a clean surface I;

[0072] Step 2: Dissolve 1.0 g of tris (Tris buffer) in 0.97 L of deionized water at room temperature, and perform magnetic stirring to obtain solution A, then dissolve 1.8 g of dopamine in 0.03 L of deionized water, and carry out Ultrasonic dispersion to obtain solution B;

[0073] Step 3: Use hydrochloric acid to adjust the pH of solution A to 8. During the continuous magnetic stirring process, the magnetic stirring rotation speed is 1000r, 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 temperature of 80°C f...

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Abstract

The invention relates to an MOF-5 / dopamine double-effect enhanced paper-based friction material and a preparation method thereof. The preparation method comprises the steps that carbon fibers are soaked and cleaned through acetone, and a sizing agent and other impurities on the surfaces of the fibers are removed; carbon fibers with clean surfaces are sequentially put into a trihydroxymethyl aminomethane solution and a dopamine solution, and a high-adhesion dopamine flexible film is formed on the surfaces of the carbon fibers; then, based on a hydrothermal reaction, an MOF-5 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; the modified carbon fibers and a resin matrix are adopted to construct a double-effect enhanced interface structure, and the MOF-5 / dopamine double-effect enhanced paper-based friction material is prepared. The dynamic friction coefficient of the prepared MOF-5 / dopamine double-effect enhanced paper-based friction material is increased to 0.1279 from 0.1068, and the amplification is 19.76%. The wear rate is reduced from 3.55*10<-8 >cm<3>. J<-1> to 3.00*10<-8>cm<3>. J<-1 >, and the reduction amplitude is 15.49%. The double-effect enhancement effect of MOF-5 / dopamine based on a mechanical interlocking and chemical coupling mechanism is fully displayed, and the friction and wear performance can be remarkably improved when the MOF-5 / dopamine is applied to the paper-based friction material.

Description

technical field [0001] The invention belongs to the technical field of friction materials, and relates to a MOF-5 / dopamine double-effect reinforced paper-based friction material and a preparation method. Background technique [0002] The paper-based friction material is made of carbon fiber, aramid fiber, plant fiber, friction performance regulator and resin binder as the main raw materials, and is prepared through the processes of wet papermaking, vacuum filtration and hot pressing curing. Because of its excellent characteristics such as smooth braking process, low noise and long working life, it is widely used in the transmission and braking devices of vehicles. However, due to the smooth surface and strong chemical inertness, it is difficult for high-strength and high-modulus carbon fibers to form an effective bond with the resin matrix, which seriously affects the performance of friction materials. During actual working conditions, under the conditions of heavy load, hi...

Claims

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Application Information

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