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Method for conducting chemical modification on nitrile butadiene rubber surface by using oxidation solution

A technology of nitrile butadiene rubber and oxidizing solution is applied in the field of material surface modification, which can solve the problems of difficult to master the degree of treatment, thin modified layer thickness, and complicated processing technology, and achieves improved wettability, improved oil resistance, and simple process. Effect

Active Publication Date: 2012-11-07
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Sulfonation can increase the free energy of the rubber surface, improve the wetting performance, and help improve the bonding strength; but at the same time, it will cause fine cracks on the rubber surface, which is difficult to handle in mass production, and a large amount of concentrated acid will pollute the environment
Surface physical modification technologies such as plasma treatment, graft copolymerization, bionic coating, etc. have the disadvantages of thin modified layer, easy peeling, poor stability, and cumbersome processing technology.

Method used

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  • Method for conducting chemical modification on nitrile butadiene rubber surface by using oxidation solution
  • Method for conducting chemical modification on nitrile butadiene rubber surface by using oxidation solution
  • Method for conducting chemical modification on nitrile butadiene rubber surface by using oxidation solution

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Soak nitrile rubber in a mixed solution containing 50% sulfuric acid, 10% potassium iodide, and 5% potassium bromide (mass percentage), soaking time at room temperature for 3 days; then place it in a dry environment at 100°C for 1 hour, that is Polar nitrile rubber with high hardness and good anti-friction and wear resistance can be obtained. Among them, nitrile rubber needs to be cleaned in an ultrasonic cleaner with acetone with a concentration (volume fraction) of 95%, industrial alcohol with a concentration (volume fraction) of 98%, and deionized water before and after surface treatment. 5 minutes.

Embodiment 2

[0047] Soak nitrile rubber in a mixed solution containing 50% sulfuric acid, 10% potassium iodide, and 5% potassium bromide (mass percentage), soaking time at room temperature for 5 days; then place it in a dry environment at 100°C for 1 hour, that is Polar nitrile rubber with high hardness and good anti-friction and wear resistance can be obtained. Among them, nitrile rubber needs to be cleaned in an ultrasonic cleaner with acetone with a concentration (volume fraction) of 95%, industrial alcohol with a concentration (volume fraction) of 98%, and deionized water before and after surface treatment. 5 minutes.

Embodiment 3

[0049] Soak nitrile rubber in a mixed solution containing 50% sulfuric acid, 10% potassium iodide, and 5% potassium bromide (mass percentage), soaking time at room temperature for 7 days; then place it in a dry environment at 100°C for 1 hour, that is Polar nitrile rubber with high hardness and good anti-friction and wear resistance can be obtained. Among them, nitrile rubber needs to be cleaned in an ultrasonic cleaner with acetone with a concentration (volume fraction) of 95%, industrial alcohol with a concentration (volume fraction) of 98%, and deionized water before and after surface treatment. 5 minutes.

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Abstract

The invention relates to a method for conducting chemical modification on a nitrile butadiene rubber surface by using an oxidation solution. The method includes the following steps: (1) surface processing: soaking nitrile butadiene rubber in a mixed solution containing 30-60% of sulfuric acid, 10-15% of potassium iodide and 5-10% of potassium bromide (mass percentage) for 3-7 days; and (2) drying processing: placing the nitrile butadiene rubber in a dry environment at the temperature of 100-110 DEG C for 1-2 hours. By conducting chemical modification on the nitrile butadiene rubber surface, a molecular structure of the nitrile butadiene rubber surface is changed so that polarity and hardness of the nitrile butadiene rubber surface are improved, mechanical performance, antifriction performance and abrasion resistance are improved, and service life of rubber products is greatly prolonged. The method is simple in process and low in cost.

Description

technical field [0001] The invention relates to a method for oxidizing and chemically modifying the surface of nitrile rubber, which belongs to the technical field of material surface modification. After the method is adopted, the oil resistance and anti-friction and wear resistance of rubber are greatly improved. Background technique [0002] In oil extraction, oil refining, aerospace, automobile, machinery manufacturing and other industrial production, a large number of rubber products are required, and with the continuous development of the level of industrialization, the requirements for the mechanical properties and friction properties of rubber products are becoming more and more stringent. [0003] Nitrile rubber (NBR) is a copolymer of butadiene and acrylonitrile. Since the molecular structure of NBR contains nitrile groups, it has better oil resistance. But at the same time, because the bond energy of the nitrile group is not large enough and the content is limited...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/14C08L9/02
Inventor 王世杰韩珩吕晓仁
Owner SHENYANG POLYTECHNIC UNIV
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