Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Conductive silicon rubber material with ultralow compressive deformation and low hardness and preparation method thereof

A compression deformation, conductive silicon technology, applied in conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of large hardness and compression set, complex preparation process, large percolation value of the compound, and achieve low Hardness, simple preparation process, and the effect of reducing the amount of filling

Active Publication Date: 2013-06-19
BEIJING UNIV OF CHEM TECH
View PDF1 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tian Ming, Yan Shani, etc. applied for the publication of the invention patent No.CN102604388A. Modified metal-plated fibers and modified metal-plated particles or graphene are used to fill silicone rubber, but the percolation value of the system is relatively large, and good conductivity must be achieved. It is necessary to increase the filling amount of fillers, which will cause the hardness and compression set of the compound to be too large, and the fillers need to be modified, which makes the preparation process complicated and the cost increased

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A conductive silicone rubber material with extremely low compression deformation and low hardness, the raw material components and parts by mass are:

[0022] Methyl vinyl silicone rubber 100g

[0023] Carbon black 6g

[0024] Carbon nanotubes 0.5g

[0025] Vulcanizing agent TAIC 2g

[0026] Vulcanizing agent bis-2,5 3g

[0027] Composite material preparation method: sequentially add methyl vinyl silicone rubber and carbon black on a two-roll mill and mix for 10 minutes, then add arrayed carbon nanotubes, co-vulcanizing agent, and vulcanizing agent and mix for 5 minutes. Use a 25t flat vulcanizer for one-stage vulcanization, the vulcanization temperature is 170°C, the vulcanization pressure is 10MPa, and the vulcanization time is 10min. Then carry out two-stage vulcanization in an electric blast drying oven. The vulcanization temperature is 200°C, and the vulcanization time is 2h. The test results are: Shore A hardness 42, 25% constant compression set 6% (100℃×24h...

Embodiment 2

[0029] A conductive silicone rubber material with extremely low compression deformation and low hardness, the raw material components and parts by mass are:

[0030] Methyl vinyl silicone rubber 100g

[0031] Carbon black 8g

[0032] Carbon nanotubes 2g

[0033] Vulcanizing agent TAIC 3g

[0034] Vulcanizing agent bis-2,5 5g

[0035] Carry out mixing, test by the preparation method of embodiment 2. The test results are: Shore A hardness of 47, 25% constant compression set of 7% (100℃×24h), instantaneous rebound performance of 69%, and volume resistivity of 4.3Ω·cm.

Embodiment 3

[0037] A conductive silicone rubber material with extremely low compression deformation and low hardness, the raw material components and parts by mass are:

[0038] Methyl vinyl silicone rubber 100g

[0039] Carbon black 10g

[0040] Carbon nanotubes 1.5g

[0041] Vulcanizing agent TAIC 4g

[0042] Vulcanizing agent bis-2,5 6g

[0043] Carry out mixing, test by the preparation method of embodiment 2. The test results are: Shore A hardness 50, 25% constant compression set of 9% (100℃×24h), instantaneous rebound performance of 62%, and volume resistivity of 2.9Ω·cm.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
diameteraaaaaaaaaa
electrical resistivityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a conductive silicon rubber material with ultralow compressive deformation and low hardness and a preparation method thereof and belongs to the technical field of conductive silicon rubber materials. The rubber material is prepared by filling conductive fillers with different shape factors so as to ensure that a network passage is formed under the condition of low-usage conductive filler. The rubber material comprises the following ingredients in parts by mass: 100 parts of silicon rubber, 1-15 parts of vulcanizing agent, 0 or 1-8 parts of vulcanizing assistant, 5-15 parts of carbon black and 0.5-5 parts of carbon nanotubes. According to the material, the material is endowed with higher conductivity under the condition that lower compression permanent deformation and lower hardness are guaranteed; the preparation process is simple, and the cost is low; and through testing the electrical and mechanical properties of the material, the conductive silicon rubber material has the following properties: the Shore A hardness is not higher than 50, the 25% constant compression permanent deformation is not higher than 10% (100 DEG C * 24 h), the instantaneous resilience performance is not lower than 60%, and the volume resistivity is not higher than 50 omega.cm.

Description

technical field [0001] The invention belongs to the technical field of conductive silicon rubber materials, and in particular relates to a conductive silicon rubber material with extremely low compression deformation and low hardness and a preparation method thereof. Background technique [0002] The main function of conductive rubber is to seal and prevent electromagnetic leakage, so good electrical conductivity, low hardness and pressure change are necessary properties for conductive rubber composite materials. Silicone rubber has excellent heat aging resistance and weather resistance, and the molecular chain is very flexible, and the interaction force between the chains is weak, so that it has great flexibility and elasticity after vulcanization. These unique properties make silicone rubber widely used in the field of preparing conductive rubber. At present, my country's research on conductive rubber is still in its infancy compared with other developed countries, and it...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L83/07H01B1/24C08K13/04C08K7/00C08K3/04B29C35/02
Inventor 田明纪连杰张立群邹华宁南英冯予星
Owner BEIJING UNIV OF CHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com