Bi-component conductive silica gel as well as preparation method and application thereof

A conductive silicone, two-component technology, applied in the field of conductive adhesive, can solve the problem of large heat dissipation, and achieve the effect of improving shielding efficiency, excellent shielding efficiency and good storage stability

Active Publication Date: 2021-06-04
深圳市星河达科技有限公司
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason is that the heat dissipation of 5G equipment is large, which leads to the long-term use of the equipment in an environment greater than 70°C, and the outdoor e

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
  • Bi-component conductive silica gel as well as preparation method and application thereof
  • Bi-component conductive silica gel as well as preparation method and application thereof
  • Bi-component conductive silica gel as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041] Preparation Example 1

[0042] A kind of nickel-coated graphite / carbon fiber in the present application is prepared by the following operation steps:

[0043] a. Weigh graphite and carbon fiber in a ratio of 1:3 by weight, and use ultrasonic treatment to mix the two evenly to obtain a graphite / carbon fiber composite material;

[0044] b. Oil removal: the above-mentioned graphite / carbon fiber composite material was deoiled by ultrasonic oscillation with 15wt% NaOH aqueous solution at 54°C for 10min, and the sample was taken out and rinsed with deionized water until neutral;

[0045] c. Roughening: use 10wt% HNO 3 The aqueous solution was coarsened by ultrasonic vibration at 55 °C for 10 min, and the sample was taken out and rinsed with deionized water until neutral;

[0046] d. Sensitization: in 37wt% hydrochloric acid 60mL / L, SnCl 2 ·2H 2 In the sensitizing solution of 0 30g / L, ultrasonically vibrate for 6min, take out the sample, and rinse it with deionized water; ...

Example Embodiment

[0050] Preparation Example 2

[0051] The nickel-coated graphite / carbon fiber of Preparation Example 2 is the same as that of Preparation Example 1, except that the same amount of graphite is replaced by flexible graphite.

Example Embodiment

[0052] Preparation Example 3

[0053] The fumed silica-titanium dioxide composite powder in this application is prepared by the following operations:

[0054] Pretreatment of fumed silica: Add sodium polyacrylate with 12% total slurry weight, ultrafine grinding for 80min at 23℃, rotating speed 1200r / min, ball-to-material ratio 5.5:1, slurry concentration 2.3% , to obtain the fumed silica after dispersion treatment;

[0055] Pretreatment of titanium dioxide: ultra-fine grinding for 60 minutes at 24°C, rotating speed 1200r / min, ball-to-material ratio of 4:1, and slurry concentration of 50% to obtain dispersed titanium dioxide;

[0056] The treated fumed silica and titanium dioxide are mixed in a weight ratio of 1:0.5, the concentration of the slurry is controlled to be 12%, ultrafine grinding for 40min, and sieving to obtain a silica / titanium dioxide composite material with an average particle size of 1000 meshes .

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
Shielding effectivenessaaaaaaaaaa
Login to view more

Abstract

The invention relates to the technical field of conductive adhesives, in particular to bi-component conductive silica gel and a preparation method and application thereof. The bi-component conductive silica gel comprises an adhesive A and an adhesive B. The adhesive A is prepared from the following raw materials in parts by weight: 80 to 120 parts of alpha, omega-dihydroxy polydimethylsiloxane, 10 to 20 parts of diethylamino methyl triethoxy silane, 60 to 90 parts of nickel-coated graphite/carbon fiber, 1 to 3 parts of coupling agent, 5 to 15 parts of filler and 0.001 to 0.01 part of catalyst; The adhesive B is prepared from the following raw materials in parts by weight: 80 to 120 parts of alpha, omega-dihydroxy polydimethylsiloxane, 10 to 20 parts of diethylamino methyl triethoxy silane, 60 to 90 parts of nickel-coated graphite/carbon fiber, 1 to 3 parts of a coupling agent, 5 to 15 parts of filler and 3 to 5 parts of ethynyl cyclohexanol. The shielding effectiveness of the conductive silica gel can reach up to 138 dB and is more than 80 dB after aging, the shielding effectiveness is excellent, and the conductive silica gel can be widely applied to the repeater to shield electromagnetic interference of wireless communication equipment.

Description

technical field [0001] This application relates to the technical field of conductive adhesive, more specifically, it relates to a two-component conductive silica gel and its preparation method and application. Background technique [0002] With the rapid development of modern communication technology, electromagnetic interference and electromagnetic compatibility problems caused by electromagnetic waves are becoming more and more serious. It will not only cause interference and damage to electronic instruments and equipment, affect their normal work, but also pollute the environment and endanger human health. In addition, electromagnetic wave leakage will also endanger national information security and the security of military core secrets. Therefore, exploring efficient electromagnetic shielding materials to prevent electromagnetic interference and electromagnetic compatibility problems caused by electromagnetic waves is of great significance for improving the safety perfor...

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
IPC IPC(8): C09J183/04C09J9/02C09J11/04C09J11/06H05K9/00
CPCC08K2003/0862C08L2201/08C09J9/02C09J11/04C09J11/06C09J183/04H05K9/0081C08K9/00C08K3/04C08K7/06C08K9/02C08K9/10C08K3/08C08K9/08C08K7/26C08K13/06C08K5/544
Inventor 徐远东
Owner 深圳市星河达科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap