Electrode material of carbon black-carbon nanotube mixed filled silica gel and process thereof

A carbon nanotube, mixed filling technology, applied in the direction of carbon silicon compound conductors, circuits, electrical components, etc., can solve the problem of inability to take into account electrical conductivity, flexibility and dimensional stability, reduce the mechanical strength and tensile properties of composite materials, electroosmosis The problem of high threshold value can achieve the effect of low AC impedance, optimized production process and simple preparation process

Pending Publication Date: 2022-08-05
浙江柔灵科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of conductive silicone has poor long-term stability and is not suitable for use in wearable products
[0003] In the application of carbon material-silica gel, due to the high electro-permeation threshold of carbon black in the compound to form a conductive path, the existing carbon black-silica gel conductive composite material needs to be filled with carbon black accounting for 20%-30% of the total mass. However, increasing the proportion of carbon black will reduce the mechanical strength and tensile properties of the composite.
Carbon nanotubes have excellent mechanical properties and electrical conductivity, but are rarely used in mass-produced silicone electrodes due to their high cost
[0004] Therefore, it is necessary to mass-produce flexible silicone electrodes by means of multi-material synergistic modification and production process improvement to solve the problem that the existing technology cannot balance conductivity, flexibility and dimensional stability.

Method used

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  • Electrode material of carbon black-carbon nanotube mixed filled silica gel and process thereof
  • Electrode material of carbon black-carbon nanotube mixed filled silica gel and process thereof
  • Electrode material of carbon black-carbon nanotube mixed filled silica gel and process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] like figure 1 and Image 6 As shown, this carbon black-carbon nanotube hybrid electrode material filled with silica gel is applied to wearable devices, including the following steps:

[0043] S00, using a silane coupling agent to prepare modified carbon black and modified carbon nanotubes treated by surface grafting respectively;

[0044] Wherein, the weight ratio of carbon black (CB) to the silane coupling agent is 1:10-1:20.

[0045] Wherein, the weight ratio of carbon nanotube (CNT) to silane coupling agent is 1:15-1:30.

[0046] The carbon nanotubes are multi-walled carbon nanotubes produced by chemical vapor deposition.

[0047] Among them, the silane coupling agent is mainly acryloxysilane coupling agent, including but not limited to A-174 (3-methacryloyloxypropyltrimethoxysilane), Z-6033 (3-methacryloyloxypropyltrimethoxysilane) Acyloxypropylmethyldimethoxysilane), A-1597 (3-(trimethoxysilyl)propyl acrylate), M-0725 (3-(trimethoxysilyl)propylmethyl acrylate) ...

Embodiment 2

[0064] Based on Embodiment 1, this embodiment provides a preferred example, and the specific steps are as follows:

[0065] Step 1: Dissolve 1 g of high-conductivity carbon black and 20 g of silane coupling agent A-174 in 200 mL of anhydrous toluene, cover with plastic wrap, ultrasonically treat it in a water bath at 70°C for 1 hour, and then cool to room temperature. To the mixture was added the initiator AIBN 1 g and reacted in an oxygen-free environment in an oil bath at 65°C for 24 hours. After the reaction, the product was naturally cooled and washed with toluene, and then centrifuged by a high-speed centrifuge at a speed of 1400 rpm and a centrifugation time of 10 minutes. Conductive carbon black.

[0066] Step 2: Dissolve 1 g of carbon nanotubes and 30 g of silane coupling agent A-174 in 200 mL of anhydrous toluene, cover with plastic wrap, ultrasonically treat in a 75°C water bath for 1 hour, and then cool to room temperature. To the mixture was added AIBN 1 g and re...

Embodiment 3

[0070] This implementation is based on Example 1. As a control group, the difference from Example 2 is that: high-conductivity carbon black-carbon nanotubes are not subjected to surface grafting treatment. 1 g of joint agent KH550 was dispersed in an appropriate amount of DMF, followed by mechanical stirring for 5 minutes, ultrasonic dispersion for 30 minutes, and the rest of the operations were the same to obtain No. 2 sample of conductive silicone rubber.

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Abstract

The invention relates to an electrode material of carbon black-carbon nanotube mixed filled silica gel and a process thereof. According to the scheme, the process comprises the following steps: S00, respectively preparing modified carbon black and modified carbon nanotubes subjected to surface grafting treatment by using a silane coupling agent; s10, taking a proper amount of modified carbon black and modified carbon nanotubes, adding a proper amount of a dispersion medium, carrying out ultrasonic treatment until full dispersion, immediately taking a suspension, stirring and mixing the suspension and liquid silicone rubber for a set time, adding a curing agent in the midway, and continuously stirring until the mixture is uniform to obtain a mixed solution; wherein the weight ratio of the carbon black to the carbon nanotubes is 9: 1-1.5: 1; and S20, the mixed solution is poured into a mold and subjected to vacuum defoaming till defoaming is completed, heating curing is conducted till curing forming is conducted, the electrode material is taken out, and the electrode material is obtained, and the weight ratio of the silica gel to the filler is 100: 7-100: 3. The electrode material prepared by the invention has excellent conductivity, flexibility and dimensional stability, and can be used for wearable equipment for collecting and conducting bioelectricity.

Description

technical field [0001] The invention relates to the technical field of electrode materials, in particular to a carbon black-carbon nanotube mixed-filled silica gel electrode material and a process thereof. Background technique [0002] The current commercial conductive silicone is mainly made of metal and its oxide filled silicone rubber, which adopts the process of molding and extrusion. Such conductive silicone has poor long-term stability and is not suitable for use in wearable products. [0003] In the application of carbon material-silica gel, the existing carbon black-silica gel conductive composite material needs to be filled with carbon black accounting for 20%-30% of the total mass due to the high electro-permeation threshold of carbon black forming a conductive path in the composite. However, increasing the proportion of carbon black will reduce the mechanical strength and tensile properties of the composites. Carbon nanotubes have excellent mechanical properties...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L83/07C08K9/06C08K3/04H01B1/04H01B1/12H01B13/00
CPCC08K9/06C08K3/04C08K3/041H01B1/04H01B1/12H01B13/00C08K2201/011C08K2201/001C08L83/04
Inventor 董瑞涵孙瑜王海涛
Owner 浙江柔灵科技有限公司
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