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Method for preparing nitrile rubber filled with carbon nano tube and having thermal-oxidative aging resistance

A technology of carbon nanotubes and nitrile rubber, which is applied in the field of rubber, can solve problems such as few reports, and achieve the effects of simple and easy preparation process, excellent high temperature resistance, and strong process operability

Active Publication Date: 2016-11-09
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Few reports have been reported on carbon nanotubes with inert surfaces

Method used

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  • Method for preparing nitrile rubber filled with carbon nano tube and having thermal-oxidative aging resistance
  • Method for preparing nitrile rubber filled with carbon nano tube and having thermal-oxidative aging resistance
  • Method for preparing nitrile rubber filled with carbon nano tube and having thermal-oxidative aging resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Preparation of functional carbon nanotubes

[0048] Weigh 13 g of multi-walled carbon nanotubes, and simultaneously measure 450 mL of concentrated sulfuric acid and 150 mL of concentrated nitric acid into a 1000 mL beaker, stir mechanically for 30 min, transfer the mixture to a 1000 mL three-necked flask, and reflux at 120 °C for 6 h. After the temperature in the flask dropped to room temperature, the activated carbon nanotubes were centrifuged and washed with a large amount of distilled water until neutral, and placed in a vacuum drying oven at 80° C. for 24 hours. The mass concentrations of concentrated sulfuric acid and concentrated nitric acid are 98% and 68% respectively.

[0049] Weigh 10 g of activated carbon nanotubes, 5 g of hindered phenol AO-80, and 600 mL of solvent DMF, put them in a 1000 mL beaker, stir mechanically for 30 min, transfer the mixture to a 1000 mL three-necked flask, and reflux at 160 °C for 10 h. After the temperature in the flask dropp...

Embodiment 2

[0058] (1) Preparation of functional carbon nanotubes

[0059] The preparation method of functional carbon nanotubes is the same as that in Example 1.

[0060] (2) Preparation of nitrile rubber

[0061] 100 parts of nitrile rubber (40% by mass of acrylonitrile) raw rubber was masticated on an open mill and rolled several times. Reduce the roller pitch, and mix 30 parts of hindered phenol-modified carbon nanotubes, 3 parts of magnesium stearate, 2 parts of zinc oxide, 2.5 parts of sulfur and 1 part of accelerator TMTD on the open mill. The mixed rubber was vulcanized in a hot press, and hot-pressed at 15MPa and 160°C for 30min to obtain the final product.

[0062] The performance data of the prepared nitrile rubber is shown in Table 2.

Embodiment 3

[0064] 1. Preparation of functional carbon nanotubes

[0065] The preparation steps of functional carbon nanotubes are the same as Example 1.

[0066] 2. Preparation of NBR

[0067] 100 parts of nitrile rubber (40% by mass of acrylonitrile) raw rubber was masticated on an open mill and rolled several times. Reduce the roller distance, mix 15 parts of hindered phenol modified carbon nanotubes, 3 parts of calcium hydroxide, 2 parts of zinc stearate, 2.5 parts of sulfur, 1 part of accelerator DM and 0.5 parts of accelerator TMTD on the open mill uniform. The mixed rubber was vulcanized in a hot press, and hot pressed at 20 MPa and 155° C. for 30 minutes to obtain the final product.

[0068] The performance data of the prepared nitrile rubber is shown in Table 2.

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Abstract

The invention relates to a method for preparing nitrile rubber filled with carbon nano tubes and having thermal-oxidative aging resistance. The method comprises the following steps: firstly, preparing a carbon nano tube padding with thermal-oxidative aging resistance, from the point of a molecular structure; mixing the padding with a nitrile rubber matrix, a vulcanizing agent, an acid-absorbing agent and an accelerant; and vulcanizing, thereby acquiring the product. The nitrile rubber prepared according to the method provided by the invention has excellent thermal-oxidative aging resistance, has better mechanical properties and high temperature resistance, can be used as a high-performance sealing material for a long term, and is especially suitable for long-time hot air and oil medium sealing environment.

Description

technical field [0001] The invention belongs to the field of rubber, in particular to a method for preparing heat-resistant and oxidative aging carbon nanotube-filled nitrile rubber. Background technique [0002] Rubber materials are an important class of polymer materials and are widely used in sealing products in aerospace, electronic instrumentation and other fields. However, long-term use of rubber will cause it to age, resulting in hardening and brittleness of the material, a decrease in strength, and a gradual loss of sealing performance. If it is exposed to high temperature air for a long time, it will produce serious thermo-oxidative aging reaction, which will greatly shorten the service life of rubber materials. For nitrile rubber that often works under thermal oxygen conditions, it is urgent to effectively prevent the negative effects of thermal oxygen aging. Usually, in order to improve the aging performance of nitrile rubber, engineers will add a certain amount...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08K13/06C08K9/02C08K9/04C08K7/00C08K3/04
CPCC08K3/04C08K7/00C08K9/02C08K9/04C08K13/06C08K2201/005C08K2201/011C08L2201/08C08L9/02
Inventor 张继华王昊张辉李杰陈江涛
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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