Modified silicone rubber containing CNTs (carbon nano tubes)-PDMS (polydimethylsiloxane) and preparation method of modified silicone rubber

A technology of dimethyl siloxane and carbon nanotubes, which is applied in the field of rubber materials, can solve the problems of rare thermal stability and achieve the effect of improving tensile strength and thermal stability

Inactive Publication Date: 2014-03-12
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, research on CNTs and silicone rubber composites has mainly focused on mechanics, optoelectronics, and thermal conductivity, while research on thermal stability is relatively rare.

Method used

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  • Modified silicone rubber containing CNTs (carbon nano tubes)-PDMS (polydimethylsiloxane) and preparation method of modified silicone rubber
  • Modified silicone rubber containing CNTs (carbon nano tubes)-PDMS (polydimethylsiloxane) and preparation method of modified silicone rubber
  • Modified silicone rubber containing CNTs (carbon nano tubes)-PDMS (polydimethylsiloxane) and preparation method of modified silicone rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step 1. Mix 100 parts by weight of raw silicone rubber on a double roller at a temperature of 40°C for 10 minutes to make the SR raw rubber evenly stick to the roller;

[0031] Step 2. Add 40 parts by weight of white carbon black, 10 parts by weight of hexamethyldisilazane, 2 parts by weight of polyvinyl silicone oil, 1 part by weight of carbon nanotube grafted polydimethylsiloxane, and 1 part by weight respectively. 1 part of 2,5-dimethyl-2,5-di-tert-butylperoxide hexane, mixing for 15 minutes, mixing the rubber evenly to obtain a rubber compound;

[0032] Step 3. Load the rubber compound into 140×140×2mm 3 The mold is vulcanized by hot pressing for 5 minutes at a temperature of 200°C and a pressure of 12 MPa, and a vulcanized film is obtained after cooling.

Embodiment 2

[0034] Step 1. Mix 100 parts by weight of raw silicone rubber on a double roller at a temperature of 50°C for 1 min to make the SR raw rubber evenly stick to the roller;

[0035] Step 2: Add 40 parts by weight of white carbon black, 10 parts by weight of hexamethyldisilazane, 3 parts by weight of polyvinyl silicone oil, 2 parts by weight of carbon nanotube grafted polydimethylsiloxane, and 0.5 parts by weight respectively. 1 part of 2,5-dimethyl-2,5-di-tert-butylperoxide hexane, mix for 5-15min, mix the rubber evenly to obtain a rubber compound;

[0036] Step 3. Load the rubber compound into 140×140×2mm 3 The mold is vulcanized and molded by hot pressing for 15 minutes at a temperature of 160°C and a pressure of 5 MPa, and a vulcanized film is obtained after cooling.

Embodiment 3

[0038] Step 1. Put 100 parts by weight of raw silicone rubber on a double roller at a temperature of 45°C and mix for 5 minutes to make the SR raw rubber evenly stick to the roller;

[0039] Step 2: Add 40 parts by weight of white carbon black, 10 parts by weight of hexamethyldisilazane, 2.5 parts by weight of polyvinyl silicone oil, 3 parts by weight of carbon nanotube grafted polydimethylsiloxane, and 0.8 parts by weight. 1 part of 2,5-dimethyl-2,5-di-tert-butylperoxide hexane, mix for 10 minutes, mix the rubber evenly to obtain a rubber compound;

[0040] Step 3. Load the rubber compound into 140×140×2mm 3 The mold is vulcanized and molded by hot pressing for 10 minutes at a temperature of 170°C and a pressure of 10 MPa, and a vulcanized film is obtained after cooling.

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Abstract

The invention discloses a modified silicone rubber containing CNTs (carbon nano tubes)-PDMS (polydimethylsiloxane) and a preparation method of the modified silicone rubber. The preparation method comprises the following steps: mixing 100 parts of methyl vinyl silicone rubber, 40 parts of white carbon black, 10 parts of HMDS (hexamethyldisilazane), 2-3 parts of multi-vinyl silicone oil, 1-5 parts of CNTs-PDMS, 0.5-1 part of 2, 5-dimethyl-2, 5-di(tert-butyl peroxy)hexane in parts by weight, and performing vulcanization for molding. According to the invention, PDMS is used for modifying the surfaces of CNTs, and then the CNTs are compounded with the silicone rubber, so that the thermal oxidation stability of the silicone rubber is improved.

Description

Technical field [0001] The invention belongs to the field of rubber materials, and more specifically, relates to a preparation method for improving the heat resistance of high-temperature vulcanized silicone rubber. Background technique [0002] High Temperature Vulcanized Silicone Rubber (HTVSR) has many unique and excellent properties that ordinary rubber does not have. For example, silicone rubber is non-toxic and odorless, and has good resistance to high and low temperatures (300°C and -90°C). The original strength and elasticity are still not lost), electrical insulation, light aging resistance, oxygen aging resistance, mildew resistance and chemical stability. As a special synthetic rubber, it has been widely used in aerospace, defense and military industry, electronic and electrical, machinery manufacturing, building materials, petrochemicals, medical and health, daily life and other national economic fields, and has become an indispensable advanced material. In order to...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08K13/06C08K9/06C08K7/00C08K3/04C08K3/36C08K5/5445B29C43/58
Inventor 郑俊萍吴亚玲白雨莲张祥汪浩
Owner TIANJIN UNIV
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