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

Conductive elastomer and preparation method thereof

A technology of elastomers and thermoplastic elastomers, applied in the field of materials, can solve problems such as low tensile strength and elongation at break, high resistivity, and hindering applications

Pending Publication Date: 2020-04-24
GUIZHOU MATERIAL IND TECH INSTITUE +1
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing conductive elastomers still have high resistivity, low tensile strength and low elongation at break, which hinder their wider application.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Conductive elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] A preparation method of a conductive elastomer, comprising the steps of:

[0019] Step 1, dissolving the conductive filler in an organic solvent, so that the conductive filler is evenly dispersed to obtain the dispersed conductive filler;

[0020] Step 2. After uniformly mixing the dispersed conductive filler with the fiber-forming polymer, remove the organic solvent, then banbury at 200-250°C for 2-5 minutes with an internal mixer, then cool and crush to make conductive masterbatch;

[0021] Step 3: The conductive masterbatch and the thermoplastic elastomer are evenly mixed, heated and melted, and then multi-stage stretched and extruded to form a conductive elastomer composite material.

[0022] The above manufacturing steps have the following advantages:

[0023] 1. Prepare conductive masterbatch with easy fiber-forming polymer as carrier. After multi-stage stretching, the conductive masterbatch forms a conductive microfiber network in the thermoplastic elastomer, a...

Embodiment 1

[0026] 65 parts of POE elastomer (polyolefin elastomer), 20 parts of polylactic acid, and 15 parts of conductive carbon black were prepared according to the above-mentioned preparation method. The volume resistivity of the prepared CB / PLA / POE elastomer composite was 4.4×10 5 Ω·cm, tensile strength 8.2MPa, elongation at break 1804%.

Embodiment 2

[0028] 68 parts of POE elastomer (polyolefin elastomer), 20 parts of polybutylene terephthalate, and 12 parts of multi-walled carbon nanotubes. The volume resistivity of the prepared MWCNT / PBT / POE elastomer composite was 8.6×10 4 Ω·cm, tensile strength 7.6MPa, elongation at break 1700%.

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
electrical resistivityaaaaaaaaaa
tensile strengthaaaaaaaaaa
electrical resistivityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a conductive elastomer, which comprises the following components in parts by weight: 50-87 parts of thermoplastic elastomer, 10-35 parts of easily-fiber-forming polymer and 3-15 parts of conductive filler. According to the invention, the conductive masterbatch is prepared by taking an easy-fiber-forming polymer as a carrier. The conductive masterbatch forms a conductive microfiber network in the thermoplastic elastomer after multistage stretching, and forms a conductive path in an elastomer matrix, so that the conductivity of the composite material can be well improved;compared with a method of directly adding the conductive filler, the method of prefabricating the master batch has the advantages that the conductive filler can be more uniformly dispersed in the polymer, no pollution is caused to processing equipment, and the damage is smaller. In addition, the conductive filler is dispersed in the carrier, a fiber network is formed through the carrier, then a conductive network is formed in the thermoplastic elastomer, and the flexibility of the elastomer is not reduced while the conductivity of the thermoplastic elastomer is improved.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a conductive elastomer and a preparation method thereof. Background technique [0002] Usually, rubber or elastomer materials have high volume resistivity, which makes it difficult to find applications in microelectronics such as electromagnetic shielding. In order to meet the electrical performance in different environments, people add conductive fillers to the elastomer to reduce the resistivity, thereby improving the electrical conductivity of the material. The prepared conductive elastomer has been widely used in contact switches, sensing elements, electromagnetic shielding seals, antistatic devices and microelectronic components. [0003] However, the existing conductive elastomers still have high resistivity, low tensile strength and elongation at break, which hinder their wider application. Contents of the invention [0004] The object of the present invention is t...

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): C08L23/08C08L67/04C08L67/02C08K3/04C08J3/22
CPCC08L23/0815C08J3/226C08L2207/04C08K2201/001C08K2201/011C08J2323/08C08J2467/04C08J2467/02C08L67/04C08K3/04C08L67/02C08K3/041
Inventor 黄安荣孙静罗珊珊秦舒浩田井速罗恒
Owner GUIZHOU MATERIAL IND TECH INSTITUE
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