Rigid-flexible ZIF-8/dopamine synergistically enhanced paper-based friction material and preparation method thereof

A paper-based friction material, ZIF-8 technology, applied in the direction of synthetic cellulose/non-cellulose material pulp/paper, natural cellulose pulp/paper, paper, etc., can solve problems such as single method and no related research, and achieve Improve interface bonding, improve the ability to resist stress damage, and prevent fiber pull-out

Active Publication Date: 2021-09-28
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is a single method for improving the interfacial bonding of composite materials in the existing technology, and it is urgent to develop a simple and effective method to improve the interfacial bonding of paper-based friction materials while maintaining the strength of the fiber material body, so as to comprehensively improve paper-based friction. Friction and wear properties of materials
At present, there is no relevant research on the use of two-component ZIF-8 and dopamine to construct a rigid-flexible interface structure to synergistically reinforce paper-based friction materials.

Method used

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  • Rigid-flexible ZIF-8/dopamine synergistically enhanced paper-based friction material and preparation method thereof
  • Rigid-flexible ZIF-8/dopamine synergistically enhanced paper-based friction material and preparation method thereof
  • Rigid-flexible ZIF-8/dopamine synergistically enhanced paper-based friction material and preparation method thereof

Examples

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preparation example Construction

[0048] see figure 1 , a rigid-flexible (ZIF-8 / dopamine) synergistically reinforced paper-based friction material and a preparation method thereof, comprising the following steps:

[0049] Step 1: Take 15g of carbon fiber and soak it in acetone for 12-24 hours to remove the sizing agent and other impurities on the surface of the fiber. After completion, rinse it with deionized water for 3-5 times and dry it in an oven at a temperature of 80-120°C for 12-24 hours. , drying to obtain carbon fiber I with a clean surface;

[0050] Step 2: Dissolve 1.0-1.5 g of tris (Tris buffer) in 0.97-1.45 L of deionized water at room temperature, stir magnetically to obtain solution A, and then dissolve 1.8-2.2 g of dopamine in 0.03 ~0.05L deionized water, conduct ultrasonic dispersion to obtain solution B;

[0051] 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 1200-1500r, pour solut...

Embodiment 1

[0063] Step 1: Take 15g of carbon fiber and soak it in acetone for 12 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 80°C for 12 hours. Dry it to obtain carbon fiber with a clean surface I;

[0064] 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;

[0065] 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 1200r, 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...

Embodiment 2

[0073] Step 1: Take 15g of carbon fiber and soak it in acetone for 16 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 85°C for 18 hours. Dry to obtain carbon fiber with a clean surface I;

[0074] Step 2: Dissolve 1.2g of tris (Tris buffer) in 0.97L of deionized water at room temperature, and perform magnetic stirring to obtain solution A, then dissolve 1.9g of dopamine in 0.03L of deionized water, and carry out Ultrasonic dispersion to obtain solution B;

[0075] Step 3: Use hydrochloric acid to adjust the pH of solution A to 8.5. 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 temperature of 90°...

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Abstract

The invention relates to a rigid-flexible ZIF-8/dopamine synergistically enhanced paper-based friction material and a preparation method thereof. The preparation method comprises the steps that carbon fibers are sequentially placed in tris(hydroxymethyl)aminomethane (Tris buffer solution) and a dopamine solution, and a high-adhesion dopamine flexible film is formed on the surface of the carbon fibers; and then, a compact and uniform nano ZIF-8 crystal rigid layer grows on the surface of the carbon fiber in situ through a green hydrothermal reaction, a rigid-flexible interface enhancement structure is constructed through the modified carbon fiber and a resin matrix, and the ZIF-8/dopamine synergistic enhancement type paper-based friction material is prepared. The dynamic friction coefficient of the prepared rigidity-flexibility (ZIF-8/dopamine) synergistically enhanced paper-based friction material is increased from 0.1068 to 0.1356, the increase amplitude is 26.97%, the wear rate is decreased from 3.55*10<-8> cm<3>.J<-1> to 2.45*10<-8> cm<3>.J<-1>, and the decrease amplitude is 30.99%. The synergistic effect of a ZIF-8/dopamine bi-component enhanced and constructed rigid-flexible interface enhanced structure is fully displayed, and the friction and wear performance of the paper-based friction material can be remarkably improved when the paper-based friction material 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 rigid-flexible ZIF-8 / dopamine synergistically reinforced paper-based friction material and a preparation method. Background technique [0002] The paper-based friction material is made of carbon fiber, aramid fiber and other reinforcing fibers as the main raw material, based on wet forming and pulping and papermaking technology, and is prepared through vacuum filtration and resin hot-press curing. Because of its stable friction coefficient, low wear rate and long working life, it is widely used in wet clutches and brakes in various vehicles, construction machinery, machine tools, ships and other industries. However, the low surface energy of carbon fiber, strong chemical inertness, and poor interfacial bonding with resin lead to carbon fiber fracture and interfacial debonding in carbon fiber reinforced paper-based friction materials during actual use, which limits the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/00D21H11/00D21H13/50D21H13/26D21H17/67D21H17/68D21H17/00D21J5/00D06M15/37D06M101/40
CPCD21H27/00D21H11/00D21H13/50D21H13/26D21H17/67D21H17/675D21H17/68D21H17/00D21J5/00D06M15/37D06M2101/40
Inventor 李贺军马珊珊费杰齐乐华
Owner NORTHWESTERN POLYTECHNICAL UNIV
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