A kind of carbon nanotube predispersion for modified epoxy resin and preparation method thereof

A carbon nanotube and epoxy resin technology, applied in the field of materials, can solve the problems of carbon nanotubes, reduced dispersion problems, poor antistatic properties, etc., and achieves important commercial application value, less addition, and dispersion cycle. short effect

Active Publication Date: 2022-02-11
JIANGXI COPPER TECHNOLOGY RESEARCH INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Epoxy resin is a thermosetting resin material that is widely used today, but epoxy resin usually has some defects after curing: high brittleness, poor heat resistance, poor impact resistance, poor antistatic property, etc. Certain restrictions, so the compounding of epoxy resin has become an important research topic in the industry
Although there have been many reports in the industry about carbon nanotubes improving the performance of epoxy resins, 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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  • A kind of carbon nanotube predispersion for modified epoxy resin and preparation method thereof
  • A kind of carbon nanotube predispersion for modified epoxy resin and preparation method thereof
  • A kind of carbon nanotube predispersion for modified epoxy resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Step 1: Preparation of carbon nanotube epoxy predispersion

[0054] First, pour 10 g of carbon nanotubes with a diameter of 1 to 50 nm and a length of 0.1 to 50 μm, 70 g of epoxy oligomer, 5 g of a wetting agent, and 15 g of a dispersant into a beaker, and stir for 30 minutes with a high-speed mixer until they are mixed. 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 speed of the rollers is 100 rpm, and the grinding is repeated once, and finally the carbon nanotubes are obtained. Tube predispe...

Embodiment 2

[0057] Step 1: Preparation of carbon nanotube epoxy predispersion

[0058] First, pour 10 g of carbon nanotubes with a diameter of 1 to 50 nm and a length of 0.1 to 50 μm, 70 g of epoxy oligomer, 5 g of a wetting agent, and 15 g of a dispersant into a beaker, and stir for 30 minutes with a high-speed mixer until they are mixed. 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 200 rpm, and the grinding is repeated more than 2 times, and finally carbon Nanotube Predispersion.

[0059] St...

Embodiment 3

[0062] Step 1: Preparation of carbon nanotube epoxy predispersion

[0063] First, pour 10 g of carbon nanotubes with a diameter of 1 to 50 nm and a length of 0.1 to 50 μm, 70 g of epoxy oligomer, 5 g of a carbon tube wetting agent, and 15 g of a carbon tube dispersant into a beaker, and use a high-speed mixer to Stir for 30 minutes until the mixture is homogeneous. 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 roll, the middle roll and the discharge roll is 20 μm; the roll speed is 100 rpm, and the grinding is repeated for more than 3 times, and finally the carbon nanotubes ...

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Abstract

The invention relates to the field of carbon nanotubes, and relates to a carbon nanotube predispersion for modifying epoxy resin and a preparation method thereof. The carbon nanotube predispersion is a carbon nanotube additive that can be effectively dispersed in epoxy resin, and the carbon nanotube predispersion can effectively disperse single-wall, double-wall and multi-wall carbon nanotubes. The preparation process of the carbon nanotube pre-dispersion is as follows: the epoxy oligomer, wetting agent and dispersant are fully mixed to obtain a good carrier; Dispersions. The preparation of the carbon nanotube predispersion only needs two steps of reaction, which is simple and easy. This carbon nanotube pre-dispersion is used to improve the antistatic grade of epoxy resin. It has the advantages of less addition, short dispersion cycle, good dispersion of carbon nanotubes, and good stability of epoxy resin. It can be widely used in various antistatic The carbon nanotube composite epoxy resin 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 epoxy resin and a preparation method thereof, which uses the carbon nanotube predispersion to improve the performance of epoxy resin. Background technique [0002] Carbon nanotubes have attracted great interest since their discovery due to their excellent electrical and mechanical properties. The mechanical strength of carbon nanotubes is 3 orders of magnitude higher than that of ordinary carbon fiber, glass fiber and other commonly used reinforcing materials for polymers. How to effectively, conveniently and simply disperse carbon nanotubes in polymer materials to improve the electrical and mechanical properties of polymer materials has always been a hot topic of concern to scholars at home and abroad: nanocomposites. Therefore, the biggest key to preparing carbon nanotube composites is to improve the dispersion of carbon nanotubes in polymer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/04C08K9/12C08L63/00
CPCC08K3/041C08K9/12C08K2201/011C08K2201/003C08K2201/004C08K2201/017C08L2201/04C08L63/00
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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