MOF-5 nondestructive modified carbon fiber reinforced resin-based wet friction material and preparation method thereof

A fiber-reinforced resin, wet friction material technology, applied in chemical instruments and methods, other chemical processes, bulk chemical production, etc. Surface energy, solving the effect of low interface strength and increasing surface roughness

Active Publication Date: 2019-04-12
SHAANXI UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

The Chinese patent with the application number CN201610554989.X "A Method for Grafting Triazine Dendritic Molecules on the Surface of Carbon Fibers" removes the epoxy coating on the surface of carbon fibers, oxidizes carbon fibers, reduces carbon fibers, and grafts triazines on the surface of carbon fibers. Dendritic molecules and other processes have been used to obtain modified carbon fibers, which effectively solve the problems of less grafting of groups to carbon fibers and large loss of carbon fiber body strength, but the experimental process is cumbersome and the test period is long
The Chinese patent with application number CN201710056932.1 "A method of grafting and modifying carbon fiber surface sizing agent with acrylamide aqueous solution" solves the technology of low interfacial bonding strength of carbon fiber reinforced vinyl ester resin or unsaturated polyester resin composite materials problem, but will cause damage to the inherent strength of the fiber

Method used

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  • MOF-5 nondestructive modified carbon fiber reinforced resin-based wet friction material and preparation method thereof
  • MOF-5 nondestructive modified carbon fiber reinforced resin-based wet friction material and preparation method thereof
  • MOF-5 nondestructive modified carbon fiber reinforced resin-based wet friction material and preparation method thereof

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preparation example Construction

[0028] A method for preparing MOF-5 nondestructively modified carbon fiber reinforced resin-based wet friction material, comprising the following steps:

[0029] Step 1: Firstly, acetone is used in a Soxhlet extractor under oil bath conditions, and a mixture of acetone and water is used to treat carbon fibers in a supercritical state to remove surface sizing agents and other pollutants. It was washed and dried repeatedly with deionized water. Wherein, the temperature and time of the oil bath used were 110° C. and 2 h, respectively, and a mixed solution of acetone and water with a volume ratio of 5:1 was used to treat the carbon fibers in a Soxhlet extractor.

[0030]Step 2: The above-mentioned carbon fibers were treated with nitric acid at 130° C. for 2 hours, filtered and recovered, washed with deionized water, and placed in an oven at 70° C. for drying to obtain functionalized carbon fibers.

[0031] Step 3: Dissolve a certain amount of zinc nitrate hexahydrate and terephth...

Embodiment 1

[0037] Step 1: Firstly, acetone and a mixture of acetone and water are used to treat the carbon fiber at a supercritical state of 110°C in a Soxhlet extractor under oil bath conditions, so as to remove surface sizing agents and other pollutants. It was washed and dried repeatedly with deionized water. The above-mentioned carbon fibers were treated with nitric acid at 130°C for 2 hours, recovered by filtration, washed with deionized water, and placed in an oven at 70°C to dry for later use to obtain functionalized carbon fibers.

[0038] Step 2: Dissolve 0.1g polyacrylonitrile-based carbon fiber, 0.714g zinc nitrate hexahydrate and 0.133g terephthalic acid in 50mL N,N-dimethylformamide, magnetically stir for 1 hour, and perform a homogeneous reaction at 130°C React in the container for 24 hours, cool with the furnace, take out the carbon fiber after the reaction is completed, wash the carbon fiber with DMF and chloroform repeatedly for 3 times, age for 12 hours, and then dry it...

Embodiment 2

[0042] Step 1: Firstly, acetone and a mixture of acetone and water are used to treat the carbon fiber at a supercritical state of 110°C in a Soxhlet extractor under oil bath conditions, so as to remove surface sizing agents and other pollutants. It was washed and dried repeatedly with deionized water. The above-mentioned carbon fibers were treated with nitric acid at 130°C for 2 hours, recovered by filtration, washed with deionized water, and placed in an oven at 70°C to dry for later use to obtain functionalized carbon fibers.

[0043] Step 2: Dissolve 0.01g polyacrylonitrile-based carbon fiber, 0.714g zinc nitrate hexahydrate and 0.133g terephthalic acid in 50mL N,N-dimethylformamide, magnetically stir for 1 hour, and perform a homogeneous reaction at 130°C React in the container for 24 hours, cool with the furnace, take out the carbon fiber after the reaction is completed, wash the carbon fiber with DMF and chloroform repeatedly for 3 times, age for 12 hours, and then dry i...

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Abstract

The invention discloses an MOF-5 nondestructive modified carbon fiber reinforced resin-based wet friction material and a preparation method thereof. The preparation method comprises the following steps: firstly, treating carbon fibers to remove a surface sizing agent other pollutants, then treating the carbon fibers by nitric acid at a certain temperature to obtain functionalized carbon fibers forproviding active sites for subsequent growth, dissolving the carbon fibers, zinc nitrate hexahydrate and terephthalic acid in an N,N-dimethylformamide solution, carrying out uniform magnetic stirring, then carrying out a hydrothermal reaction to modify the carbon fibers to obtain MOF-5 modified carbon fibers, finally, mixing the modified carbon fibers with aramid fibers, paper fibers and resin toprepare friction material body paper, and carrying out hot-pressing curing process to obtain the MOF-5 modified carbon fiber reinforced resin-based wet friction material. According to the invention,loss caused by a conventional treatment process on carbon fibers can be avoided, and strength of the fibers is not damaged while surface activity of the fibers is improved.

Description

technical field [0001] The invention relates to the field of wet friction materials, in particular to a MOF-5 non-destructive modified carbon fiber reinforced resin-based wet friction material and a preparation method thereof, which are suitable for aviation, automobiles, trains, airplanes, ships, oil drilling rigs, mining machinery, energy sources , ships, construction and other traffic engineering machinery fields. Background technique [0002] Friction materials are widely used in various transportation vehicles (such as automobiles, trains, airplanes, ships, etc.) and transmission materials in brakes, clutches and friction transmission devices of various machinery and equipment, and are very important security parts. Resin-based friction material has the advantages of high friction coefficient, smooth and soft joint, low noise, less damage to the paired disc, and low cost. It is an indispensable friction material for power transmission or braking deceleration in various ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08L1/02C08L77/10C08K9/04C08K7/06C08J5/24C09K3/14
CPCC08J5/24C08J2361/14C08J2401/02C08K7/06C08K9/04C09K3/14Y02P20/54
Inventor 费杰周曼段笑屈蒙张立洁谷岳峰黄剑锋曹丽云
Owner SHAANXI UNIV OF SCI & TECH
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