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Low-compressive-deformation and high-conductivity rubber composite material and preparation method thereof

A composite material and high conductivity technology, applied in the production of bulk chemicals, etc., can solve the problems of small elasticity affecting the sealing effect, and achieve the effects of good elasticity and sealing, improved dispersion, and low viscosity

Active Publication Date: 2012-07-25
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a low compression deformation high conductive rubber composite material and its preparation method for the problem that the existing high conductive rubber composite material has little elasticity and affects the sealing effect. 2 The combined use of granular and fibrous metal-plated conductive fillers modified by reactive double bond silane coupling agents in a supercritical state improves the elasticity of conductive rubber composites and obtains a low compression deformation high conductive rubber composite

Method used

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  • Low-compressive-deformation and high-conductivity rubber composite material and preparation method thereof
  • Low-compressive-deformation and high-conductivity rubber composite material and preparation method thereof
  • Low-compressive-deformation and high-conductivity rubber composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] Low compression deformation and high conductive rubber composite material, its raw material components and mass parts are:

[0029] Methyl vinyl silicone rubber 100g

[0030] Conductive filler 202g

[0031] Vulcanizing agent double 2,5 2g

[0032] The conductive filler is a mixture of modified silver-plated glass beads and modified silver-plated glass fibers, and the mass ratio of the modified silver-plated glass beads to the modified silver-plated glass fibers is 14:5.

[0033] Filler modification method: 140g of silver-plated glass microspheres (S-3000-S3N from Porter, USA, particle size 20-50μm, real density 2.5g / cm 3 ), 50g of silver-plated glass fiber (SF82TF8 from Porter, USA, aspect ratio 5-50, length 50-175μm, real density 2.7g / cm 3 ), 12g of vinyltriethoxysilane A151 were added to the reaction kettle, then dry ice was added, and a magnetic stirring bar was put in at the same time, the reaction kettle was sealed and heated in a constant temperature oil bath a...

Embodiment 2

[0036] Low compression deformation and high conductive rubber composite material, its raw material components and mass parts are:

[0037]

[0038]The conductive filler is a mixture of modified silver-plated copper and modified silver-plated glass fiber, and the mass ratio of the modified silver-plated copper to the modified silver-plated glass fiber is 8:1.

[0039] Filler modification method: 160g of silver-plated aluminum (SA270S20, American Porter Company, particle size 44-88μm, real density 3.2g / cm 3 ), 20g silver-plated glass fiber (with embodiment 1), 12g coupling agent octyltriethoxysilane A137 add in the reactor, then add dry ice, put into magnetic stirring bar simultaneously, the reactor is airtight and in constant temperature oil bath Heat at medium temperature at 100°C until the pressure reaches 13.5MPa, turn on the magnetic stirrer, stir for 1.5 hours, close the valve after the reaction and slowly reduce the pressure to normal pressure, wait for the reaction ke...

Embodiment 3

[0042] Low compression deformation and high conductive rubber composite material, its raw material components and mass parts are:

[0043]

[0044] The conductive filler is a mixture of modified nickel-plated graphite and modified nickel-plated carbon fiber, and the mass ratio of modified silver-plated copper to modified silver-plated glass fiber is 4:1.

[0045] Filler modification method: 80g nickel-plated graphite (E-FILL2701 from Sulzer, Canada, particle size 60-165μm, true density 4.0g / cm 3 ), 20g nickel-plated carbon fiber (Sulzer Canada E-FILL2901, aspect ratio 5-50, length 60-250μm, true density 3.8g / cm 3 ), 6g of coupling agent vinyltriethoxysilane A151 were added to the reaction kettle, then dry ice was added, and a magnetic stirring bar was placed at the same time, the reaction kettle was sealed and heated in a constant temperature oil bath at a temperature of 40°C until the pressure reached 10MPa , turn on the magnetic stirrer, stir for 1 hour, close the valve ...

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Abstract

The invention relates to a low-compressive-deformation and high-conductivity rubber composite material and a preparation method thereof. The low-compressive-deformation and high-conductivity rubber composite material is prepared by the following steps of: taking silicon rubber as a base body and utilizing modified grain-shaped and fiber-shaped metal-plating conductive fillers containing a reactive double-bond silane coupling agent under a CO2 supercritical state to prepare low-compressive-deformation and high-conductivity rubber composite material. Under the condition of guaranteeing the high conductivity, the use amount of the conductive fillers is reduced and the composite material has low compressive deformation and high conductive property.

Description

technical field [0001] The invention relates to a low-compression-deformation high-conductivity rubber composite material and a preparation method thereof, that is, a low-compression-deformation high-conductivity rubber composite material is obtained by plating conductive metal particle fillers and plating conductive metal fibers and filling silicone rubber, which is used for civil, Electromagnetic shielding sealing system for military electronic equipment. Background technique [0002] Conductive rubber composite materials are prepared by compounding conductive fillers and filling rubber matrices. They are mainly used to prevent electromagnetic leakage from pores in electronic equipment. Therefore, high conductivity and flexibility are necessary properties for electromagnetic shielding rubber composite materials. Predecessors have done a lot of research on the preparation of high-performance conductive rubber composite materials filled with different fillers. [0003] In t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K9/02C08K9/06C08K7/20C08K7/14C08K3/08C08K3/04C08K7/06
CPCY02P20/54
Inventor 田明颜莎妮张立群邹华冯予星张继阳
Owner BEIJING UNIV OF CHEM TECH
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