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Electrochemically modified carbon cloth reinforced friction material and preparation method thereof

A friction material and electrochemical technology, applied in the field of friction materials, can solve problems such as harsh conditions and long processing time, and achieve the effects of simple equipment, precise control of the reaction process, and short processing time

Active Publication Date: 2015-11-11
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carbon fiber cloth used is oxidized, but its oxidation requires high temperature and high pressure environment, harsh conditions and long processing time

Method used

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  • Electrochemically modified carbon cloth reinforced friction material and preparation method thereof
  • Electrochemically modified carbon cloth reinforced friction material and preparation method thereof
  • Electrochemically modified carbon cloth reinforced friction material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1: Cut the carbon cloth into a rectangular shape of 7cm*8cm, first soak it in deionized water for 30min, then arrange the carbon cloth in an acetone solution for 12h with ultrasonic assistance, and then dry it to obtain sample P.

[0032] Step 2: nickel sulfate (NiSO 4 ·7H 2 O) 0.1mol / L, ammonium sulfate ((NH 4 ) 2 SO 4 ) 10g / L, boric acid (H 3 BO 4 ) 20g / L, add 500ml of deionized water and stir for 2 hours to obtain composite nickel source electrolyte solution A, the pH at room temperature is controlled to be 2.2-2.7.

[0033] Step 3: Add solution A to the electrolytic cell, fix the sample P on the anode of the graphite electrode, process the current at 2A, and process for 3 minutes. After the reaction is completed, exchange the cathode and anode, and process again for 3 minutes. Remove the carbon cloth from the electrolytic cell Take it out and dry it in an oven at 80°C to obtain sample B.

[0034] Step 4: Put sample B into modified phenolic resin (30% cas...

Embodiment 2

[0037] Step 1: Cut the carbon cloth into a rectangular shape of 7cm*8cm, first soak it in deionized water for 30min, then arrange the carbon cloth in an acetone solution for 12h with ultrasonic assistance, and then dry it to obtain sample P.

[0038] Step 2: nickel sulfate (NiSO 4 ·7H 2 O) 0.05mol / L, ammonium sulfate ((NH 4 ) 2 SO 4 )5g / L, boric acid (H 3 BO 4 ) 10g / L, add 500ml of deionized water and stir for 1 hour to obtain composite nickel sulfate electrolyte solution A, the pH at room temperature is controlled to be 2.2~2.7.

[0039] Step 3: Add solution A into the electrolytic cell, fix the samples P1 and P2 on the cathode and anode of the graphite electrode respectively, the treatment current intensity is 1A, the treatment time is 1min, and the treated carbon cloth is dried in an oven at 60°C Samples B1, B2 were obtained.

[0040] Step 4: spray modified phenolic resin solution (10% nitrile rubber modified phenolic resin dehydrated alcohol solution) on sample B1, ...

Embodiment 3

[0042] Step 1: Cut the carbon cloth into a rectangular shape of 7cm*8cm, first soak it in deionized water for 30min, then arrange the carbon cloth in an acetone solution for 12h with ultrasonic assistance, and then dry it to obtain sample P.

[0043] Step 2: nickel sulfate (NiSO 4 ·7H 2 O) 0.3mol / L, ammonium sulfate ((NH 4 ) 2 SO 4 ) 15g / L, boric acid (H 3 BO 4 ) 30g / L, add 500ml of deionized water and stir for 3 hours to obtain composite nickel sulfate electrolyte solution A, pH control at room temperature is 2.2~2.7.

[0044] Step 3: Add solution A into the electrolytic cell, fix the samples P1 and P2 on the cathode and anode of the graphite electrode respectively, set the treatment current to 3A, and the treatment time to 4min, and dry the treated carbon cloth in an oven at 80°C to obtain Sample B1, B2.

[0045] Step 4: spray modified phenolic resin solution (20% cashew shell modified phenolic resin absolute ethanol solution) on sample B1, B2, dry naturally, get samp...

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Abstract

The invention provides an electrochemically modified carbon cloth reinforced friction material and a preparation method thereof. The method adopts a carbon fiber cloth and modified phenolic resin as raw materials, and comprises the following steps: processing the carbon cloth under electrochemical conditions, selecting a composite nickel source as an electrolyte, and processing carbon fibers by adopting an anode oxidation and cathode metal nickel deposition technologies; and spraying the processed carbon cloth with a modified phenolic resin solution, taking out the sprayed carbon cloth, naturally airing, and carrying out hot pressing molding by using a vulcanizing machine. The carbon cloth undergoes anode oxidation and cathode deposition treatment under electrochemical conditions with the composite nickel source as an electrolyte to increase the oxygen-containing function groups on the surface of the carbon cloth and uniformly deposit metallic nickel. The method has the advantages of simple device and high efficiency, and the metallic nickel has large hardness, wear resistance and catalysis activity and greatly improves the bonding strength between the carbon cloth and the resin, so the uniformity of netted polymers formed through cross-linking linear polymers in the vulcanizing process is improved, thereby the friction material has a good tribology performance.

Description

【Technical field】 [0001] The invention belongs to the field of friction materials, in particular to an electrochemically modified carbon cloth reinforced friction material and a preparation method thereof. 【Background technique】 [0002] Composite materials refer to materials that use one material as a matrix and another material as a reinforcement. Carbon fiber has the advantages of high specific strength, high specific modulus, high temperature resistance, corrosion resistance, and wear resistance. Carbon fiber cloth has good strength in both transverse and longitudinal directions, high load-bearing pressure and excellent tribological properties. In composite materials Medium is a reinforcement material with excellent performance. Carbon cloth reinforced resin composites are mainly used in automotive automatic transmissions, differentials, synchronizers, torque managers and other wet clutches. Document 1 "Chinese Patent Publication No. CN102757621A" discloses a wet compo...

Claims

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Application Information

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IPC IPC(8): C08L61/14C08K9/00C08K7/06C25D5/54C25D3/12
Inventor 费杰罗丹段笑黄剑锋欧阳海波李翠艳罗威张超
Owner SHAANXI UNIV OF SCI & TECH
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