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Iron oxide modified carbon nanotube-silicone rubber composite material and preparation method thereof

A technology of carbon nanotubes and composite materials, applied in the field of rubber materials

Inactive Publication Date: 2014-04-09
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As of now, about γ-Fe 2 o 3 -Relevant research on CNTs mainly focuses on the magnetic properties and electrical properties of particles, and few studies combine them with polymer matrices to explore thermal properties.

Method used

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  • Iron oxide modified carbon nanotube-silicone rubber composite material and preparation method thereof
  • Iron oxide modified carbon nanotube-silicone rubber composite material and preparation method thereof
  • Iron oxide modified carbon nanotube-silicone rubber composite material and preparation method thereof

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preparation example Construction

[0029] The specific preparation process is as follows:

[0030] Weigh 1.5g Fe(NO 3 ) 3 ·9H 2 O, dissolve it in 200mL of absolute ethanol and stir for later use. Weigh 0.35 g of acidified CNTs (CNTs-COOH) into 200 mL of absolute ethanol, and ultrasonically treat it for 1 h, then add SDBS of different qualities in the table to the dispersion, and continue ultrasonication for 30 minutes. The above Fe(NO 3 ) 3 ·9H 2 The ethanol solution of O was mixed with the ultrasonically treated CNTs-COOH suspension and stirred for 30 minutes until it was completely uniform. 24mL ammonia water was added dropwise, stirred for 30 minutes, and then stood still for extraction. After washing the product with a large amount of distilled water, it was dried in a vacuum oven at 60°C for 72 hours. The dried product is placed in a tubular muffle furnace, calcined at 600°C for 5 hours under argon protection, and then annealed to room temperature to obtain iron oxide modified CNTs, which are then milled fo...

Embodiment 1

[0035] Step 1. Mix 100 parts by weight of raw silicone rubber on a double roll at 50°C for 10 minutes to make the raw rubber evenly stick to the roll;

[0036] Step 2: Add 40 parts by weight of white carbon black, 12 parts by weight of hexamethyldisilazane and 3 parts by weight of polyvinyl silicone oil in order, mix for 15 minutes, and mix the rubber evenly;

[0037] Step 3: Add 5 parts by weight of iron oxide modified carbon nanotubes, mix for 10 minutes, add 0.5 parts by weight of 2,5-dimethyl-2,5-di-tert-butylperoxide hexane after mixing evenly, and mix for 10 minutes After rolling down the film;

[0038] Step 4. Load the mixed rubber obtained in step 3 into 120×120×2mm 3 The mold is vulcanized and molded by hot pressing for 10 minutes at a temperature of 160°C and a pressure of 10MPa. After cooling, the vulcanized film is obtained; the vulcanized film is placed in an environment of 200°C for 4 hours; then the temperature is naturally cooled to room temperature.

Embodiment 2

[0040] Step 1. Mix 100 parts by weight of raw silicone rubber on a double roller at 40°C for 1 min to make the raw rubber evenly stick to the roller;

[0041] Step 2: Add 38 parts by weight of white carbon black, 10 parts by weight of hexamethyldisilazane and 2 parts by weight of polyvinyl silicone oil in order, mix for 10 minutes, and mix the rubber evenly;

[0042] Step 3. Add 3 parts by weight of iron oxide modified carbon nanotubes, mix for 5 minutes, add 1 part by weight of 2,5-dimethyl-2,5-di-tert-butylperoxyhexane after mixing, and mix for 10 minutes After rolling down the film;

[0043] Step 4. Load the mixed rubber obtained in step 3 into 120×120×2mm 3 The mold is vulcanized by hot pressing at a temperature of 180°C and a pressure of 12MPa for 15 minutes. After cooling, the vulcanized film is obtained; the vulcanized film is placed in an environment of 200°C for 2 hours; then the temperature is naturally cooled to room temperature.

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Abstract

The invention discloses an iron oxide modified carbon nanotube-silicone rubber composite material and a preparation method thereof. The method includes: mixing 100 parts by weight of methyl vinyl silicone rubber, 38-40 parts by weight of white carbon black, 10-12 parts by weight of hexamethyldisilazane, 2-3 parts by weight of polyvinylsilicone oil, 3-5 parts by weight of iron oxide modified carbon nanotubes and 0.5-1 part by weight of 2, 5-dimethyl-2, 5-di-tert-butyl hexane peroxide, and then conducting vulcanization molding. In the invention, iron oxide modified carbon nanotubes are combined with a silicone rubber matrix, thus improving the thermal oxidative stability of the silicone rubber composite material.

Description

Technical field [0001] The invention belongs to the field of rubber materials, and more specifically, relates to an iron oxide modified carbon nanotube / silicone rubber composite material and a preparation method thereof. Background technique [0002] Silicone Rubber (SR), as an important member of high-performance synthetic rubber, has an irreplaceable position in modern high-tech, aerospace and other high-tech fields. Silicone rubber is a polymer with Si-O bond units as the main chain and organic groups as the side chain. It is obviously different in structure and performance from polymers with C-C bond units as the main chain. It is a typical semi-inorganic semi-organic polymer, which has both the heat resistance of inorganic polymers and the flexibility of organic polymers. Compared with other polymer rubbers, the most notable feature of silicone rubber lies in its excellent thermal stability. It is widely used as an elastic material in high-temperature environments in aerosp...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08K13/06C08K9/02C08K7/00C08K3/04C08K3/36C08K5/5445B29C35/02
Inventor 郑俊萍张祥张强
Owner TIANJIN UNIV
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