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CN-122011783-A - High-conductivity colored silicon rubber material based on carbon nano tube and preparation and application thereof

CN122011783ACN 122011783 ACN122011783 ACN 122011783ACN-122011783-A

Abstract

The invention relates to the field of conductive silicone rubber, in particular to a high-conductivity colored silicone rubber material based on carbon nanotubes, and preparation and application thereof. The high-conductivity colored silicone rubber material based on the carbon nano tube has the advantages that through the organic silicon raw rubber, the carbon nano tube slurry, the coupling agent, the white carbon black, the organic pigment color paste and the vulcanizing agent in a specific proportion, all the raw materials are matched with each other, the compatibility is good, and the prepared high-conductivity colored silicone rubber material has high conductivity and excellent mechanical property, has stable coloring effect, and is not easy to fade. The specific organic pigment color paste is selected, the crosslinking network and the carbon nano tube conductive path in the sizing material are not damaged after the organic pigment color paste is added, the conductive performance, mechanical strength and processing fluidity of the material are not affected, the preparation process is simple, the operation is easy to control, the industrial mass production is facilitated, the quality of the prepared colored silicone rubber material is stable, the comprehensive performance is superior, and the problem that the high-conductivity silicone rubber in the prior art is only black and cannot be colorful is solved.

Inventors

  • LIU SIBIN

Assignees

  • 东莞市盛懋橡塑材料有限公司

Dates

Publication Date
20260512
Application Date
20260323

Claims (10)

  1. 1. The high-conductivity colored silicone rubber material based on the carbon nano tube is characterized by comprising the following components of organosilicon raw rubber, carbon nano tube slurry, a coupling agent, white carbon black, organic pigment color paste and a vulcanizing agent.
  2. 2. The carbon nanotube-based high-conductivity colored silicone rubber material according to claim 1, which is characterized by comprising, by weight, 90-110 parts of organosilicon raw rubber, 15-25 parts of carbon nanotube slurry, 8-10 parts of a coupling agent, 30-35 parts of white carbon black, 2-4 parts of an organic pigment paste and 7-10 parts of a vulcanizing agent.
  3. 3. The carbon nanotube-based high-conductivity colored silicone rubber material as set forth in claim 1, wherein the carbon nanotube slurry is a single-walled carbon nanotube slurry, and wherein the mass fraction of the single-walled carbon nanotube powder in the single-walled carbon nanotube slurry is 0.03-0.07%.
  4. 4. The carbon nanotube-based colored silicone rubber material of claim 1, wherein the silicone rubber is methyl vinyl silicone rubber.
  5. 5. The carbon nanotube-based highly conductive colored silicone rubber material as set forth in claim 1 wherein said coupling agent comprises bis (3-triethoxysilylpropyl) tetrasulfide.
  6. 6. The carbon nanotube-based colored silicone rubber material of claim 1, wherein the organic pigment paste is CMJ-1508, manufactured by Toguan color Meijia electronic technologies Co., ltd.
  7. 7. The carbon nanotube-based high-conductivity colored silicone rubber material of claim 1, wherein the white carbon black is fumed silica.
  8. 8. A method for preparing the carbon nanotube-based high-conductivity colored silicone rubber material according to any one of claims 1 to 7, comprising the steps of: s1, placing organosilicon raw rubber on a roller of an open double-roller rubber mixing machine at room temperature, and starting the rubber mixing machine to fully divide the raw rubber into rollers; s2, adding white carbon black into the raw rubber wrapped by the roller in the step S1, and mixing until the raw rubber is uniform, adding carbon nano tube slurry, and continuing mixing for 30-60 minutes until the system is uniform; S3, thinning the rubber material which is uniformly mixed in the step S2 for 8-10 times, then adding a coupling agent, continuously mixing for 1-5 minutes, adding a vulcanizing agent, thinning the rubber material for 8-12 times, adding an organic pigment color paste for coloring, uniformly mixing, and rolling and discharging to obtain a rubber compound; S4, placing the mixed rubber obtained in the step S3 into a flat vulcanizing machine for one-stage vulcanization, and primarily forming a silicone rubber semi-finished product; S5, transferring the semi-finished product of the silicon rubber obtained in the step S4 into a drying oven with air blast for secondary vulcanization, and cooling to obtain the silicon rubber composite material.
  9. 9. A preparation method of a high-conductivity colored silicone rubber material based on carbon nanotubes as claimed in claim 8 is characterized in that the specific step of one-stage vulcanization is that after a flat vulcanizing machine die is clamped, 8-12MPa forming pressure is applied, the vulcanization temperature is controlled to be 150-170 ℃, the heat preservation and pressure maintaining are carried out for 50-70 minutes, the specific step of two-stage vulcanization is that the temperature of an oven is controlled to be 150-170 ℃, and the heat preservation and vulcanization are carried out for 110-130 minutes.
  10. 10. Use of a highly conductive colored silicone rubber material based on carbon nanotubes according to any one of claims 1-7 for electrical muscle stimulation.

Description

High-conductivity colored silicon rubber material based on carbon nano tube and preparation and application thereof Technical Field The invention relates to the field of conductive silicone rubber, in particular to a high-conductivity colored silicone rubber material based on carbon nanotubes, and preparation and application thereof. Background At present, the preparation technology of the high-conductivity silicon rubber material is relatively mature, and is widely applied to the fields of electromagnetic shielding, antistatic, flexible electronics and the like. However, the prior art has obvious technical bottlenecks that the traditional silicone rubber material with high conductivity at the level of 10 4 omega/≡is almost dependent on high-filling amount of carbon black, metal powder and other dark conductive fillers, the finished product is generally black, colorful customization cannot be realized, the requirements of consumer ends on the appearance attractiveness and differentiation of the product are difficult to meet, meanwhile, natural contradiction exists between high conductivity and stable coloring, namely the high filling of the conductive fillers can seriously interfere the coloring effect of the color paste, the color is grey and dark, bright and uniform appearance cannot be realized, and the pain point restricts the application of the high-conductivity silicone rubber in wearable and consumer products for a long time. Aiming at the problems, the prior art attempts to realize the compatibility of electric conduction and coloring through various schemes, chinese patent CN202180069739.6 discloses a primer composition for producing a light-colored electric conduction primer coating, which comprises single-wall and/or double-wall carbon nano tubes with concentration of more than 0.005wt.% and less than 0.1wt.%, and realizes the light-colored appearance of a part by preparing a single-layer light-colored electric conduction primer and then carrying out secondary spraying coloring, but the scheme needs multi-layer construction, has complex process, and the primer layer and the top-coat layer are easy to delaminate and fall off, so that an integrated colored high-electric conduction silicon rubber body cannot be directly prepared. Chinese patent CN201811270301.0 discloses a silicon rubber conductive master batch which adopts single-wall carbon nano tubes as conductive materials in silicon rubber compound rubber, has the advantages of no fading, small addition amount, high conductive performance, stable conductive performance, high mechanical performance, low cost and the like, and the addition amount is 0.5-3 parts by mass, so that the antistatic silicon rubber with the surface resistance of 10 to the power of 11 of 10 can be prepared, belongs to antistatic grade, and can not meet the scene of severe requirements on low resistance such as muscle electrical stimulation and the like because the high conductive requirement of 10 4 ohm/-type is far not met. Chinese patent CN202010012028.2 discloses a colored fluorosilicone rubber material with antistatic property, which is prepared by mixing raw fluorosilicone rubber, white carbon black, conductive filler, titanium pigment, toner, vulcanizing agent and the like, wherein the conductive filler is at least one of single-wall carbon nano tube, multi-wall carbon nano tube, carbon fiber, graphene oxide and zinc oxide whisker, the volume resistivity of the fluorosilicone rubber obtained by the method provided by the invention is 10 6~108 Ω & cm, and the colored fluorosilicone rubber material can meet the electromagnetic shielding or antistatic application, and in addition, the addition amount of the conductive filler is small, and the strong covering capability of the titanium pigment is added, so that the electromagnetic protection or antistatic fluorosilicone rubber material with different colors can be obtained, and the same high conductivity level is not achieved, and the mechanical property and the conductive network stability of the silicone rubber cannot be damaged by the large addition of the titanium pigment, and the high conductivity, high coloring and excellent mechanical property cannot be considered. Therefore, the high-conductivity silicone rubber material in the prior art is difficult to be used by being mixed with the color paste independently, a single-layer light-color conductive primer is required to be prepared and then colored, or the color is changed by using titanium pigment to cover the color, and the like, the surface resistivity of the prepared high-conductivity silicone rubber material is difficult to reach 10 4 Ω/≡and meanwhile, the existing high-conductivity silicone rubber is generally black, the requirements of the consumer market on colorful and attractive product appearance cannot be met, and the product differentiation competition is difficult to be realized. Therefore, there is a need for a high-conductivity colored silicone r