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Method for preparing high-temperature-resistant friction material from modified ramie fibers

A technology of ramie fiber and friction material, which is applied in the field of friction material preparation, can solve the problems of poor friction stability, poor heat resistance, and low mechanical properties of materials, and achieve the effects of good heat resistance, good friction stability, and improved mechanical properties

Inactive Publication Date: 2016-12-14
仇颖莹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention: in view of the disadvantages of poor heat resistance of the currently used friction materials, when the temperature of the friction surface exceeds 120°C, it will gradually coke, resulting in poor friction stability and low mechanical properties of the material, and provides A method of weighing raw ramie hemp, soaking it in sodium chloride solution, adjusting the pH after heating and heat preservation, and filtering to obtain the filtrate after heat preservation, washing, air drying, mixing with phospholipase C and bakelite powder, and degumming modification to obtain degumming Modified ramie fiber, and then mixed ethyl orthosilicate ethanol solution, sodium dodecylsulfonate and other substances to prepare a modified mixed solution, mixed with degummed modified ramie fiber, ultrasonic oscillation, and microwave reaction modification to obtain modified ramie fiber The method of making high-temperature-resistant friction material by mixing permanent ramie fiber with nitrile rubber and other materials, and then hot-pressing it in a mold

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] First weigh the raw ramie and put it into a container, add 20% sodium chloride solution to soak the raw ramie, then heat the container, set the temperature at 110°C, keep the temperature for 30 minutes, and use the mass fraction Adjust the pH to 8.5 for the 40% sodium hydroxide solution, then raise the temperature to 130°C, keep the temperature for 1 hour, cool to room temperature naturally, filter, rinse the filtrate with absolute ethanol for 3 times, and then air-dry the above Mix the air-dried filtrate, phospholipase C with a mass of 6% of the filtrate, and 200-mesh Bakelite powder with a mass of 4% of the filtrate, soak in distilled water, and stir at 150r / min at 30°C for 1h after degumming and modification Filtrate, collect the filtrate and place it in an oven at 90°C to dry overnight to obtain degummed modified ramie fibers for subsequent use; in parts by weight, take 40 parts by weight of 35% tetraethyl orthosilicate ethanol solution, 15 parts of ten Sodium dialk...

example 2

[0019] First weigh the raw ramie and put it into a container, add 20% sodium chloride solution to soak the raw ramie, then heat the container, set the temperature at 115°C, keep the temperature for 35min, and use the mass fraction Adjust the pH to 8.8 for 40% sodium hydroxide solution, then raise the temperature to 140°C, keep the temperature for 2 hours, cool to room temperature naturally, filter, rinse the filtrate with absolute ethanol for 4 times, and then air-dry the above Mix the air-dried filtrate, phospholipase C with a mass of 7% of the filtrate, and 200-mesh Bakelite powder with a mass of 5% of the filtrate, soak in distilled water, and stir at 150r / min at 33°C for 2h after degumming and modification Filtrate, collect the filtrate and place it in an oven at 90°C to dry overnight to obtain degummed modified ramie fibers for subsequent use; in parts by weight, take 43 parts by weight of ethyl orthosilicate ethanol solution with a mass fraction of 35%, 13 parts of ten S...

example 3

[0022]First weigh the raw ramie and put it into a container, add 20% sodium chloride solution to soak the raw ramie, then heat the container, set the temperature at 120°C, keep the temperature for 40 minutes, and use the mass fraction Adjust the pH of 40% sodium hydroxide solution to 9.0, then raise the temperature to 150°C, keep the temperature for 2 hours, cool to room temperature naturally, filter, rinse the filtrate with absolute ethanol for 5 times, and then air-dry the above Mix the air-dried filtrate, phospholipase C with 9% of the filtrate, and 200-mesh bakelite powder with 6% of the filtrate, soak in distilled water, and stir at 150r / min at 35°C for 2h after degumming and modification Filtrate, collect the filtrate and place it in an oven at 90°C to dry overnight to obtain degummed modified ramie fibers for subsequent use; in parts by weight, take 45 parts by weight of 35% ethyl orthosilicate ethanol solution, 10 parts by ten Sodium dialkyl sulfonate, 20 parts of ammo...

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Abstract

The invention discloses a method for preparing a high-temperature-resistant friction material from modified ramie fibers and belongs to the technical field of friction material preparation. Raw ramie is weighed and soaked with a sodium chloride solution, after heating and heat preservation, the pH value is adjusted, filtering is carried out after heat preservation, a filtered material is obtained, after washing and air-drying, the material is mixed with phospholipase C and bakelite powder, and degummed modified ramie fibers are prepared through degumming modification; an ethyl orthosilicate ethanol solution, sodium dodecyl sulfate and other matter are taken and mixed to be prepared into a modified mixed solution, the modified mixed solution is mixed with the degummed modified ramie fibers, and the modified ramie fibers are prepared after ultrasonic oscillation and microwave reaction modification; the modified ramie fibers are mixed with butadiene-acrylonitrile rubber and other matter, and the high-temperature-resistant friction material is prepared through hot-press molding in a die. The method has the advantages that the preparation steps are simple, and the obtained product is good in heat resistance and can resist the temperature of 200-220 DEG C; the friction stability of the material is good, and the mechanical performance is improved by 45-48%.

Description

technical field [0001] The invention relates to a method for preparing a high-temperature-resistant friction material by using modified ramie fibers, and belongs to the technical field of friction material preparation. Background technique [0002] Friction material is a component material used in power machinery that relies on friction to perform braking and transmission functions. It mainly includes brake linings and clutch facings. Brake pads are used for braking and clutch plates are used for transmission. Any mechanical equipment and various moving vehicles must have braking or transmission devices. Friction material is a critical component on this braking or transmission. Its main function is to absorb or transmit power through friction. For example, the clutch plate transmits power, and the brake plate absorbs kinetic energy. They enable mechanical equipment and various motor vehicles to work safely and reliably. So the friction material is a widely used and eve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08L9/02C08K7/06C08K3/34C08K3/30C08J5/14C09K3/14
CPCC08L1/02C08L2201/08C08L2203/30C09K3/1436C08L9/02C08K7/06C08K3/346C08K2003/3045
Inventor 仇颖莹盛艳花宋国
Owner 仇颖莹
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