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

Triphase-body nanometer composite material with high dielectric constant and high elasticity and preparation method thereof

A nanocomposite, high dielectric constant technology, applied in rubber insulators, organic insulators, etc., can solve the problems of difficult to obtain flexibility, loss of mechanical properties, increase in dielectric loss, etc., to shorten the preparation time, save time and Energy, effect of lowering molding temperature

Inactive Publication Date: 2011-09-28
BEIJING UNIV OF CHEM TECH
View PDF0 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many deficiencies in the design of rubber elastomer materials, such as low dielectric constant, high dielectric loss, and poor mechanical properties.
[0003] At present, it is difficult to obtain two-phase rubber-based composite materials with good flexibility, high dielectric constant and low dielectric loss
For example, in order to obtain a composite material with a high dielectric constant, a large amount of high dielectric ceramic filler is added, so that the composite material loses the excellent mechanical properties of the rubber matrix; in addition, the added conductive filler (metal, carbon black, carbon fiber, carbon nanotube etc.), especially when the content of the conductive filler is close to the percolation threshold, the dielectric constant of the composite material can be significantly improved, while ensuring the flexibility of the rubber matrix, but the dielectric loss of the composite material is significantly increased, and the resistivity sudden drop

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
  • Triphase-body nanometer composite material with high dielectric constant and high elasticity and preparation method thereof
  • Triphase-body nanometer composite material with high dielectric constant and high elasticity and preparation method thereof
  • Triphase-body nanometer composite material with high dielectric constant and high elasticity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] According to the A1 label formula in table 1, adopt the above-mentioned preparation method to make 13.054g of BaTiO 3 , 3.5569g of VMQ, 0.05673g of CB three materials are fully mixed evenly, after being hot-pressed and vulcanized at 170°C on a hot press (pressure of 15MPa, time of 15min), the second stage is carried out in an oven at 190°C for 3 hours Vulcanization, process such as figure 1 The second half shown. The dielectric constant of its three-phase composite material (CB / BT / VMQ) corresponds to Figure 4 In 2, the dielectric loss corresponds to Figure 5 2 of

Embodiment 2A2-A6

[0033] With CB powder and VMQ by A2-A6 label proportioning and above-mentioned preparation method in table 1, with the BaTiO of 13.054g 3 Mix thoroughly and evenly. After hot press vulcanization at 170°C (pressure 15MPa, time 15min) on a hot press, perform two-stage vulcanization in an oven at 190°C for 3 hours. The process flow is as follows: figure 1 shown. A series of samples can be prepared by using this method, and the dielectric constant of the three-phase composite material whose sample ratio is A2-A6 varies with frequency corresponding to Figure 4 In 3-7, the dielectric loss of the three-phase composite material whose sample ratio is A2-A5 changes with frequency Figure 5 In 3-6, the relationship between the dielectric constant of the three-phase composite material with the sample ratio of A5 and the temperature and frequency corresponds to Image 6 . The elastic moduli of the three-phase composites with sample ratios of A4 and A5 correspond to Figure 7 2 and 3 i...

Embodiment 3A7

[0035] CB powder and VMQ are pressed the A7 proportioning in table 1 with the BaTiO of 13.054g 3 Mix thoroughly and evenly. After hot press vulcanization at 170°C (pressure 15MPa, time 15min) on a hot press, perform two-stage vulcanization in an oven at 190°C for 3 hours. The process flow is as follows:figure 1 shown. The frequency-dependent dielectric properties of the sample correspond to Figure 4 8 of them.

[0036] From attached image 3 It can be seen that the percolation threshold of the three-phase composite composed of carbon black, barium titanate and silicone rubber occurs when the volume fraction of carbon black is 3.5%. When the volume content of carbon black is 3.5%, the three-phase composite has a high dielectric constant ( image 3 Known), low dielectric loss ( Figure 5 6 in) and higher elasticity ( Figure 7 3 in it can be known).

[0037] Table 1

[0038]

[0039] Description: Each composite contains 40vol% BaTiO 3 , with a mass of 13.054g.

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
dielectric lossaaaaaaaaaa
Login to View More

Abstract

The invention discloses a triphase-body nanometer composite material with high dielectric constant and high elasticity and a preparation method thereof, wherein the triphase-body nanometer composite material comprises an inorganic material and an organic material, wherein the inorganic material comprises conductive stuffing carbon black (CB) powder and barium titanate BaTiO3 (BT) and the organic material comprises methylvinylsiloxane rubber (VMQ). The triphase-body nanometer composite material has the formula in a volume ratio: 0.5 to 4% of CB powder body, 40% of barium titanate powder body (BT) and 56 to 59.5% of methylvinylsiloxane rubber (VMQ). The preparation method comprises the steps of: heat-treating the BT powder and the CB powder, grinding and formulating a VMQ solution, carrying out pressure moulding by adopting a solution mixing and low-temperature hot pressing vulcanization method, and carrying out post treatment. The triphase-body (CB / BaTiO3 / VMQ) nanometer composite material disclosed by the invention has the advantages of high dielectric constant, low dielectric loss and high elasticity; and a hot pressing method for reducing forming temperature, shortening preparation time and being convenient for forming is adopted; and the composite material with stable performance and fine tenacity is obtained in a shorter time, therefore time and energy are saved.

Description

technical field [0001] The invention belongs to the technical scope of composite materials, and specifically relates to a novel high dielectric constant triple-phase nanocomposite material with high dielectric constant, low dielectric loss, high elasticity and wide application and a preparation method thereof. Background technique [0002] Rubber-based nanocomposites are new polymer composites that use rubber as the matrix and filled particles dispersed in the matrix at the nanometer scale. Due to the nano effect of nanoparticles and the strong interfacial interaction between nanoparticles and matrix, rubber-based nanocomposites have better electrical, mechanical and thermal properties than conventional polymer composites with the same components, so as to prepare high-performance, Versatile next-generation composites offer a new avenue. Rubber-based nanocomposites have a special structure and excellent performance, showing attractive application prospects. At present, they...

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): C08L83/07C08K3/04C08K3/24B29C43/02B29C35/02H01B3/28
Inventor 党智敏夏兵
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