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A method for modifying nanocarbon materials to strengthen epoxy resin matrix composites

A nano-carbon material and epoxy resin technology are applied in the field of modifying nano-carbon materials to strengthen epoxy resin-based composite materials to achieve the effect of improving storage modulus and simple process

Active Publication Date: 2019-11-12
常州嘉晖新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is simple, economical, efficient, and environmentally friendly, and solves the problem of industrialization of high-performance nano-carbon materials-epoxy resin composites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this embodiment, the method is as follows:

[0028] 1) Disperse a certain amount of nano-diamond in excess concentrated ammonia water;

[0029] 2) Stir overnight to hydrolyze the functional group of O=C-O structure to generate carboxyl group, and combine with NH 3 •H 2 O reaction, the hydrogen in the carboxyl group is replaced with ammonium ions, and the excess ammonia volatilized is absorbed by water through the gas outlet to form ammonia water, which can be recycled for step 1;

[0030] 3) After fully stirring, turn it into 60 o C oven overnight to hydrolyze the O=C-O structural functional group and carboxyl and NH 3 •H 2 The neutralization reaction of O is further fully carried out, and the excess ammonia volatilized is absorbed by water through the gas outlet to form ammonia water, which can be recycled for step 1;

[0031] 4) The dried products were collected, and X-ray photoelectron spectroscopy showed that new nitrogen groups appeared, indicating that the...

Embodiment 2

[0035] In this embodiment, the method is as follows:

[0036] 1) Disperse a certain amount of carbon nanotubes in excess concentrated ammonia water;

[0037] 2) Stir overnight to hydrolyze the functional group of O=C-O structure to generate carboxyl group, and combine with NH 3 •H 2 O reaction, the hydrogen in the carboxyl group is replaced with ammonium ions, and the excess ammonia volatilized is absorbed by water through the gas outlet to form ammonia water, which can be recycled for step 1;

[0038] 3) After fully stirring, turn it into 60 o C oven overnight to hydrolyze the O=C-O structural functional group and carboxyl and NH 3 •H 2 The neutralization reaction of O is further fully carried out, and the excess ammonia volatilized is absorbed by water through the gas outlet to form ammonia water, which can be recycled for step 1;

[0039] 4) Collect the dried product, and evenly disperse the modified carbon nanotubes in a commercial epoxy resin material according to th...

Embodiment 3

[0043] In this embodiment, the method is as follows:

[0044] 1) Disperse a certain amount of graphene in excess concentrated ammonia water;

[0045] 2) Stir overnight to hydrolyze the functional group of O=C-O structure to generate carboxyl group, and combine with NH 3 •H 2 O reaction, the hydrogen in the carboxyl group is replaced with ammonium ions, and the excess ammonia volatilized is absorbed by water through the gas outlet to form ammonia water, which can be recycled for step 1;

[0046] 3) After fully stirring, turn it into 60 o C oven overnight to hydrolyze the O=C-O structural functional group and carboxyl and NH 3 •H 2 The neutralization reaction of O is further fully carried out, and the excess ammonia volatilized is absorbed by water through the gas outlet to form ammonia water, which can be recycled for step 1;

[0047] 4) Collect the dried product, and evenly disperse the modified graphene in a commercial epoxy resin material at a mass ratio of 1:100;

[0...

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Abstract

The invention relates to the field of an epoxy resin-based composite material, in particular to a method for modifying a nanometer carbon material to enhance an epoxy resin-based composite material. Hydrogen in carboxyl is replaced by ammonium ions by utilizing hydrolysis of rich O=C-O structural functional groups (such as carboxyl, anhydride and lactone) on the surface of a nanometer carbon material (such as nanometer diamond, a nanometer carbon tube and graphene) as well as the characteristic that an acidic carboxyl functional group is liable to react with ammonia water, so that the aim of modifying a specific nitrogen-containing group on the nanometer carbon material is fulfilled. The modification process is green and pollution-free, and the volatilized ammonia water can be effectivelycollected and recycled. The modified nanometer carbon material is compounded with the epoxy resin material; and compared with the epoxy resin-based composite material without adding the nanometer carbon material or added with the unmodified nanometer carbon material, the obtained composite material greatly improves the storage modulus under the conditions of not reducing hardness, breaking tenacity and tensile strength. The process is simple, economic, efficient and environmentally friendly, and the industrialization problem of the high-performance nanometer carbon material-epoxy resin composite material is solved.

Description

[0001] The invention relates to the field of epoxy resin-based composite materials, in particular to a method for modifying nano-carbon materials to strengthen epoxy resin-based composite materials. Background technique [0002] Nano-carbon materials (nano-diamonds, carbon nanotubes, carbon nano-fibers, graphene, etc.) often have excellent thermal, mechanical, and electrical properties. For example, diamond is the hardest substance in nature and has unique thermal conductivity; the Young's modulus of carbon nanotubes can reach 1.8 GPa, the bending strength is as high as 14.2 GPa, and the tensile strength is about 100 times that of steel, but the density is only steel About 1 / 7 of that; single-layer graphene has a Young's modulus as high as 1 TPa and an ultimate strength of 130 GPa, which has been confirmed as the strongest material found so far; sp 2 The graphite layer of the structure has excellent electrical conductivity. The surface of carbon nanomaterials is also often ri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K9/04C08K7/24C08K3/04
CPCC08K3/04C08K7/24C08K9/04C08K2201/011C08K2201/014C08L63/00
Inventor 王奇苏利群朱波苏党生
Owner 常州嘉晖新材料科技有限公司
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