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Low-density high-strength conductive rubber and preparation method thereof

A conductive rubber, low-density technology, applied in the field of low-density and high-strength conductive rubber and its preparation, can solve the problem that conductive silicone rubber cannot have high strength and high conductivity at the same time.

Inactive Publication Date: 2011-08-17
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a low-density high-strength conductive rubber and a preparation method thereof. It aims at the problem that the existing conductive silicone rubber cannot have high strength and high conductivity at the same time, and provides a low-density, high-strength conductive rubber and its preparation method. Preparation method, by using low-density, high-strength conductive fibers as conductive fillers, low-density, high-strength, high-conductivity conductive silicone rubber is obtained. The mechanical properties of the conductive rubber synthesized by this technology are better than those of powdery fillers.

Method used

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  • Low-density high-strength conductive rubber and preparation method thereof
  • Low-density high-strength conductive rubber and preparation method thereof
  • Low-density high-strength conductive rubber and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0014] Embodiment 1: The raw material components of low-density high-conductivity rubber are as follows: (both are parts by mass)

[0015]

[0016] The preparation method is as follows:

[0017] Methyl vinyl silicone rubber raw rubber (110-2, Laizhou Jintai Silicon Industry Co., Ltd.) was mixed on a double-roll mill to the front roll of the tight package, and precipitated silica (JB-180, Zhejiang Yingluohua Chemical Co., Ltd.), after mixing evenly, add nickel-plated carbon fiber with a length of 2-3cm (Ni-CF, carbon fiber continuous nickel-plating production process and its shielding composite material, Journal of Composite Materials, 2010 05 issue), mix evenly, and then Add vinyltriethoxysilane, hydroxy silicone oil and 2,5-dimethyl-2,5-di-tert-butyl peroxyhexane, thin pass 8 times, one-stage vulcanization and two-stage vulcanization to obtain conductive rubber. (First-stage vulcanization conditions: flat machine, 10MPa, 160±5°C, 10min, second-stage vulcanization conditio...

Embodiment 2

[0018] Embodiment 2: The raw material components of low-density high-conductivity rubber are as follows: (both are parts by mass)

[0019]

[0020]

[0021] The preparation method is as follows:

[0022] Mix the methyl vinyl silicone rubber raw rubber on the double-roll mill to the front roll of the tight package, add white carbon black, mix evenly, add nickel-plated carbon fiber, mix evenly, and then add vinyl triethoxysilane , hydroxy silicone oil and 2,5-dimethyl-2,5-di-tert-butylperoxyhexane, thin pass 8 times, one-stage vulcanization, and two-stage vulcanization to obtain conductive rubber. Its density is 1.26g / cm 3 ; The volume resistivity is 0.26Ω·cm; the tensile strength is 2.97MPa; the elongation at break is 197%.

Embodiment 3

[0023] Embodiment 3: The raw material components of low-density high-conductivity rubber are as follows: (both are parts by mass)

[0024]

[0025] The preparation method is as follows:

[0026] Mix the methyl vinyl silicone rubber raw rubber on the double-roll mill to the front roll of the tight package, add white carbon black, mix evenly, add nickel-plated carbon fiber, mix evenly, and then add vinyl triethoxysilane , Hydroxy silicone oil, 2,5-dimethyl-2,5-di-tert-butylperoxyhexane, thin pass 8 times, one-stage vulcanization, and two-stage vulcanization to obtain conductive rubber. Its density is 1.31g / cm 3 ; The volume resistivity is 0.09Ω·cm; the tensile strength is 3.2MPa; the elongation at break is 180%.

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Abstract

The invention relates to a low-density high-strength conductive rubber and a preparation method thereof. According to mass, the raw materials comprise: 100 portions of raw silicon rubber, 50-80 portions of conductive filler, 3-6 portions of white carbon black, 2-5 portions of silane coupling agent, 1-3 portions of hydroxy silicone oil and 1-3 portions of organic peroxides. An open double-stick rubber mixing machine is used for processing. The method includes the following steps: after mill banding of raw rubber, adding the white carbon black, conductive fiber, silane coupling agent and hydroxy silicone oil for mixing; and after uniformly mixed sizing material goes through mill run, adding the organic peroxides, conducting mill run and rolling with output of sheets. A low-density high conductive rubber can be acquired with a relatively low additive amount of conductive filler that is served as by low-density high conductive fiber.

Description

technical field [0001] The invention relates to a low-density high-strength conductive rubber and a preparation method thereof. Background technique [0002] The composite conductive material prepared by adding conductive fillers with silicone rubber as the base material has the characteristics of high temperature resistance, aging resistance, molding processability and good conductivity. It is suitable for the manufacture of conductive rubber products with complex shapes and small structures, and can be used to manufacture computers. The conductive contact points of equipment such as mobile phones and keyboards, and the highly conductive silicone rubber with a volume resistivity below 1Ω·cm can also be used in the sealing system of aerospace, ships, etc., to realize the harmony and coexistence of electronic and electrical equipment and the environment. Compatible with the environment while avoiding the leakage of important information. Commonly used conductive fillers main...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/06C08K13/06C08K9/02C08K7/06C08K5/14C08K3/36
Inventor 万怡灶王睿李群英罗红林
Owner TIANJIN UNIV
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