Preparation method of ultralow-friction rubber material

A rubber material and ultra-low friction technology, applied in the field of friction materials, can solve problems such as poor retention, complicated process, and high production costs, and achieve the effects of reducing friction coefficient and wear rate, simple operation, and cost reduction

Inactive Publication Date: 2020-10-16
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the existing low-friction rubber materials have good hydrophilicity and low wear properties, under complex working conditions, the low-friction rubber contact pairs have a relatively high friction coefficient and wear rate
Studies have shown that surface treatment of low-friction rubber can effectively improve this situation. Traditional low-friction rubber surface treatment methods mainly include: coating, texture, physical and chemical modification and other technologies, all of which are expensive, complicated, and poor in retention. insufficient
There are also technologies for processing porous structures on the surface of low-friction rubber by laser, ion etching, etc., but the production cost is high and the applicability is poor.

Method used

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  • Preparation method of ultralow-friction rubber material
  • Preparation method of ultralow-friction rubber material

Examples

Experimental program
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Effect test

Embodiment 1

[0020] This embodiment provides a method for preparing an ultra-low friction rubber material, which includes 6 parts by weight of rubber and 0.5-2 parts by weight of a pore-forming agent. In this embodiment, the number of parts by weight of the pore-forming agent is 1 part.

[0021] The rubber is an existing and commonly used rubber, which is not specifically limited, and can be nitrile rubber, natural rubber, styrene-butadiene rubber, butadiene rubber, or isoprene rubber, etc.; in this embodiment, nitrile rubber is selected.

[0022] The pore-forming agent is non-toxic and water-soluble particles, which can be sodium chloride or potassium chloride. In this embodiment, low-cost and easily available sodium chloride is selected. The particle size of the pore-forming agent is 140-200 μm, and as a further preference, the particle size of the pore-forming agent is 164±15 μm.

[0023] The specific preparation steps include fully blending the rubber and the pore-forming agent, follow...

Embodiment 2

[0030] The difference between this embodiment and Example 1 is only that the parts by weight of the pore-forming agent are 0.5 parts, the selected rubber is natural rubber, the pore-forming agent is potassium chloride, and the particle size of the pore-forming agent is 140 μm. The number of times of refining in the machine is 20 times, the pressure of vulcanization treatment is 9.5MPa, the temperature is 160°C, and the time is 25min.

Embodiment 3

[0032] The difference between this example and Example 1 is that the weight parts of the pore-forming agent is 2 parts, the rubber used is isoprene rubber, the particle size of the pore-forming agent is 200 μm, and the number of refining times in the open rubber mixer is 35 times, the pressure of vulcanization treatment is 10.5MPa, the temperature is 180°C, and the time is 35min.

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Abstract

The invention discloses a preparation method of an ultralow-friction rubber material. The ultralow-friction rubber material comprises 6 parts by weight of rubber and 0.5-2 parts by weight of a pore-forming agent, the pore-forming agent is non-toxic water-soluble particles, and the particle size of the pore-forming agent is 140-200 [mu] m; rubber and the pore-forming agent are fully blended and then subjected to vulcanization treatment, and then the surface pore-forming agent is dissolved and removed. According to the preparation method of the ultralow-friction rubber material, uniform micropores are formed in the surface of the prepared rubber material, the friction coefficient and the wear rate are remarkably reduced, and compared with an existing rubber friction material surface treatment method, operation is simpler, and the cost is remarkably reduced.

Description

technical field [0001] The invention relates to the technical field of friction materials, in particular to a preparation method of an ultra-low friction rubber material. Background technique [0002] Low-friction rubber is often used as a water-lubricated bearing bushing material and widely used in ship propulsion systems due to its good environmental protection and vibration reduction characteristics. In general, the ship propulsion system usually works under the condition of low speed and high torque, so that the low-friction rubber is in a mixed lubrication state as the contact pair. In this working condition, the friction pair will appear in a difficult state such as dry friction or boundary lubrication, resulting in The friction coefficient of the bushing layer increases and the wear is serious. Therefore, it is of great significance to improve the tribological properties of the low-friction rubber-lubricated interface. [0003] Although the existing low-friction rub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/26C08L9/02C08L7/00C08L9/06C08L9/00B29C35/02
CPCB29C35/02C08J9/26C08J2201/0444C08J2201/0446C08J2307/00C08J2309/00C08J2309/02C08J2309/06
Inventor 王家序金达韩彦峰肖科李俊阳冯伟唐东兴向果周广武周青华蒲伟
Owner CHONGQING UNIV
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