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Method for modifying surface of polymer by carbon dioxide plasma discharge under atmospheric pressure

A technology of plasma and carbon dioxide, which is applied in the field of ionic discharge modification of polymer surfaces under atmospheric pressure, can solve environmental damage, global warming and other problems, and achieve good adhesion and good tribological properties

Active Publication Date: 2021-02-19
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But CO 2 It is a kind of greenhouse gas, which brings great harm to the environment. The continuous aggravation of the atmospheric greenhouse effect will lead to global warming, resulting in a series of global climate problems that cannot be predicted by today's science.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Wash fluorosilicone rubber in deionized water for 6 minutes, repeat 5 times to remove surface pollutants;

[0017] (2) Put the above-mentioned cleaned fluorosilicone rubber into a plasma generator based on atmospheric pressure discharge; turn on the DC power supply, adjust the current to 100 mA, the working voltage to 2500 V, and the average power to 100 W;

[0018] (3) Introduce working gas CO 2 , controlling the gas flow to 3 L / min, the generated plasma density is 10 11 / cm -3 , treat the surface of the fluorosilicone rubber for 30 minutes, and take it out after the chamber cools down to obtain the plasma-modified fluorosilicone rubber;

[0019] (4) The friction performance of the above-mentioned plasma-modified fluorosilicone rubber was tested on a friction testing machine: a GCr15 steel ball with a diameter of ø5 mm was selected as the dual ball. The specific parameters are as follows: the friction load is 3N, the linear speed is 68 mm / s, the rotation radius ...

Embodiment 2

[0021] (1) Wash the fluorosilicone rubber in deionized water for 6 minutes and repeat 5 times to remove surface pollutants;

[0022] (2) Put the above-mentioned cleaned fluorosilicone rubber into a plasma generator based on atmospheric pressure discharge; turn on the DC power supply, adjust the current to 80 mA, the working voltage to 2500 V, and the average power to 100 W;

[0023] (3) Introduce working gas CO 2 , the air flow is controlled at 5 L / min, and the generated plasma density is 10 11 / cm -3 ;Treat the surface of the fluorosilicone rubber for 20 minutes, take it out after the cavity is cooled, and obtain the plasma-modified fluorosilicone rubber;

[0024] (4) Detect the friction performance of the above plasma-modified fluorosilicone rubber on a friction testing machine: select a GCr15 steel ball with a diameter of ø5mm as the dual ball. The specific parameters are as follows: the friction load is 3N, the linear speed is 68 mm / s, the rotation radius is 4mm, the hu...

Embodiment 3

[0026] (1) Wash the silicone rubber in deionized water for 6 minutes and repeat 5 times to remove surface pollutants;

[0027] (2) Put the above-mentioned cleaned silicone rubber into a plasma generator based on atmospheric pressure discharge; turn on the DC power supply, adjust the current to 60 mA, the working voltage to 2500 V, and the average power to 100 W;

[0028] (3) Introduce working gas CO 2 , control the gas flow to 1 L / min, the generated plasma density is 10 11 / cm -3 ; Treat the surface of the silicone rubber for 40 minutes; take it out after the cavity is cooled, and obtain the plasma-modified silicone rubber;

[0029] (4) Friction properties of plasma-modified silicone rubber on a friction testing machine: GCr15 steel balls with a diameter of ø5 mm were selected as the dual balls. The specific parameters are as follows: the friction load is 3 N, the linear speed is 68 mm / s, the rotation radius is 4 mm, the humidity is 27%, the test time is 30 min, and the fri...

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Abstract

The invention discloses a method for modifying the surface of a polymer by CO2 plasma discharge under atmospheric pressure, wherein the method comprises the following steps: generating plasma in CO2 gas flow by using a plasma generator based on atmospheric pressure discharge, and modifying the surface of the polymer (fluorinated silicone rubber or silicone rubber) to obtain the polymer with a low-friction-coefficient surface. The friction coefficient of the surface of the polymer is reduced to about 0.35. The surface of the polymer is bombarded on the basis of the generated CO2 high-energy particles, and the fracture and synthesis reaction of surface bonds are completed only by several atomic layers, so that the polymer has good cohesiveness while the performance of the polymer is maintained. In addition, the friction coefficient of the polymer can be reduced due to the fact that plasmas generated by discharging of the CO2 gas in the atmospheric pressure react with the polymer, the surface modified polymer with good tribological performance is obtained, and contribution is made to sustainable development of development which needs to meet the requirements of contemporary people anddoes not damage the capacity, meeting the requirements, of subsequent people.

Description

technical field [0001] The invention relates to a method for modifying the surface of a polymer, in particular to a method for modifying the surface of a polymer by discharging carbon dioxide plasma under atmospheric pressure. Background technique [0002] As early as the primitive society period, people have perceived CO in their daily life practice. 2 Its existence, until 1840, was confirmed under the name "carbon dioxide". CO 2 It has many uses, and can be used as gas fertilizer, fire extinguisher filling material, industrial raw material, and solid CO 2 (Dry ice) can be used to create stage effects and refrigeration. But CO 2 It is also a kind of greenhouse gas, which brings great harm to the environment. The continuous aggravation of the atmospheric greenhouse effect will lead to global warming, resulting in a series of global climate problems that cannot be predicted by today's science. In our daily life, CO is unavoidably produced 2 , such as: organic matter (in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08L83/04C08L83/08
CPCC08J7/123C08J2383/04C08J2383/08
Inventor 张俊彦贾倩张斌高凯雄
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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