Carbon nanotube pre-dispersion for modification of silicone rubber and preparation method thereof

A carbon nanotube and pre-dispersion technology, applied in the field of materials, can solve the problem of reducing the dispersion problem, can not solve the carbon nanotubes and other problems well, and achieves a small amount of addition, important commercial application value, and good stability of silicone rubber. Effect

Active Publication Date: 2020-01-10
JIANGXI COPPER TECHNOLOGY RESEARCH INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there have been many reports on the performance of carbon nanotube modified silicone rubber in the industry, none of them can solve the problem of fast, convenient and effective dispersion of carbon nanotubes and how to effectively reduce the minimum threshold of carbon nanotubes.

Method used

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  • Carbon nanotube pre-dispersion for modification of silicone rubber and preparation method thereof
  • Carbon nanotube pre-dispersion for modification of silicone rubber and preparation method thereof
  • Carbon nanotube pre-dispersion for modification of silicone rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Step 1: Preparation of carbon nanotube silicone oil predispersion

[0049] First, pour 10g of carbon nanotubes with a weighing diameter of 1-50nm and a length of 0.1-50μm, 70g of silicone oil oligomer, 5g of wetting agent and 15g of dispersing agent into a beaker, and stir with a high-speed mixer for 30 minutes until the mixture is uniform . Secondly, the uniformly mixed primary carbon tube pre-dispersion is subjected to high-strength grinding and shearing by using a CNC three-roller machine, and the entanglement is entangled by changing the speed and roller spacing of the feeding roller, middle roller, and discharging roller of the CNC three-roller machine. The carbon nanotubes are dispersed, and the grinding process parameters of the CNC three-roller machine: the gap between the feeding roller, the middle roller and the discharging roller is 20 μm; the roller speed is 1000rpm and the grinding is repeated once, and finally the carbon nanotubes are obtained. pre-disper...

Embodiment 2

[0053] Step 1: Preparation of carbon nanotube silicone oil predispersion

[0054] First, pour 10g of carbon nanotubes with a weighing diameter of 1-50nm and a length of 0.1-50μm, 70g of silicone oil oligomer, 5g of wetting agent and 15g of dispersing agent into a beaker, and stir with a high-speed mixer for 30 minutes until the mixture is uniform . Secondly, the uniformly mixed primary carbon tube pre-dispersion is subjected to high-strength grinding and shearing by using a CNC three-roller machine, and the entanglement is entangled by changing the speed and roller spacing of the feeding roller, middle roller, and discharging roller of the CNC three-roller machine. The carbon nanotubes are dispersed, and the grinding process parameters of the CNC three-roller machine: the gap between the feeding roller, the middle roller and the discharging roller is 10 μm; the roller speed is 200rpm and the grinding is repeated 5 times, and finally the carbon nanotubes are obtained. pre-disp...

Embodiment 3

[0058] Step 1: Preparation of carbon nanotube silicone oil predispersion

[0059] First, pour 10g of carbon nanotubes with a weighing diameter of 1-50nm and a length of 0.1-50μm, 70g of silicone oil oligomer, 5g of wetting agent and 15g of dispersing agent into a beaker, and stir with a high-speed mixer for 30 minutes until the mixture is uniform . Secondly, the uniformly mixed primary carbon tube pre-dispersion is subjected to high-strength grinding and shearing by using a CNC three-roller machine, and the entanglement is entangled by changing the speed and roller spacing of the feeding roller, middle roller, and discharging roller of the CNC three-roller machine. The carbon nanotubes are dispersed, and the grinding process parameters of the CNC three-roller machine: the gap between the feeding roller, the middle roller and the discharging roller is 30 μm; the roller speed is 400rpm and the grinding is repeated twice, and finally the carbon nanotubes are obtained. pre-disper...

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Abstract

The invention relates to the field of carbon nanotubes, and relates to a carbon nanotube pre-dispersion for modification of silicone rubber and a preparation method thereof. The carbon nanotube pre-dispersion is a carbon nanotube additive that can be effectively dispersed in silicone rubber resin. The carbon nanotube pre-dispersion can disperse single-walled, double-walled and multi-walled carbonnanotubes, and is suitable for industrial additives improving the antistatic grade of silicone rubber. The preparation process of the carbon nanotube pre-dispersion includes: fully mixing a silicone oil oligomer, a carbon tube wetting agent and a carbon tube dispersing agent to obtain a good carrier; and grinding the good carrier and carbon nanotubes under the grinding action of a three-roller machine to obtain the carbon nanotube pre-dispersion. Preparation of the carbon nanotube pre-dispersion only needs two-step reaction, and is simple and practicable. The carbon nanotube pre-dispersion hasthe advantages of small adding amount, short dispersion period, good carbon tube dispersity, good silicone rubber stability and the like, can be widely applied to various anti-electromagnetic shielding carbon nanotube composite silicone rubber, and has important commercial application value.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a carbon nanotube predispersion for modifying silicone rubber and a preparation method thereof, which uses the carbon nanotube predispersion to improve the performance of silicone rubber. Background technique [0002] Silicone rubber is a special synthetic rubber whose main chain is alternately arranged Si-O atoms, and the side groups are siloxane chain polymers, which can be cross-linked into rubber-like elastomers. Silicone rubber has excellent heat resistance, cold resistance, physiological inertia, etc., and is widely used in aerospace, chemical, medical, agricultural and other fields. However, the application of one-component silicone rubber in special fields is often limited by extreme conditions, such as high and low temperature, strong radiation, high dielectric constant, etc. Therefore, various modifications of silicone rubber have become important research topics in this field ....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L83/08C08K9/12C08K3/04
CPCC08K9/12C08K2201/003C08K2201/004C08K2201/011C08L2201/04C08K3/041C08L83/04C08L83/08
Inventor 孙云龙陈名海彭小权王小斌
Owner JIANGXI COPPER TECHNOLOGY RESEARCH INSTITUTE CO LTD
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