Graphene-waterborne epoxy high-dispersion system and synthetic method thereof

A water-based epoxy and synthesis method technology, applied in epoxy resin coatings, anti-corrosion coatings, coatings, etc., can solve problems such as pending research, heavy steel connection workload, structural safety hazards, etc., to reduce usage and increase market share. Competitiveness and the effect of reducing production costs

Active Publication Date: 2017-11-17
江苏丰彩建材(集团)有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent 201410535914.8 discloses a high-strength epoxy resin composite material and its preparation method. The method is to combine oxidized nano-carbon material (ie graphene) and triglycidyl p-aminophenol (ie epoxy resin) through simple physical Stir and mix, and then react the mixture of oxidized nano-carbon material and triglycidyl p-aminophenol with the curing agent, and add the oxidized nano-carbon material to the cured product of epoxy resin and curing agent. In essence, the oxidized nano-carbon material is still It exists in

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  • Graphene-waterborne epoxy high-dispersion system and synthetic method thereof
  • Graphene-waterborne epoxy high-dispersion system and synthetic method thereof
  • Graphene-waterborne epoxy high-dispersion system and synthetic method thereof

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Example Embodiment

[0052] Example one

[0053] According to the molar ratio of 1:2.0, take polyethylene glycol diglycidyl ether and triethylenetetramine and mix them uniformly, and carry out addition chain extension reaction at 65℃ for 3h, thereby introducing hydrophilic groups on the primary amino groups to obtain the end Amino hydrophilic polyether segment (see figure 1 ). According to the molar ratio of 2.0:1, take the amino-terminated hydrophilic polyether segment and E51 epoxy resin for addition chain extension reaction at 65℃ for 4h to obtain the amino-terminated long-chain non-ionic self-emulsifying epoxy curing agent (see figure 2 ).

[0054] Using ultrasound-assisted Hummers method to prepare low-oxidation graphene, such as image 3 As shown, the specific steps are as follows: (1) Take 100 parts by weight of 98% concentrated sulfuric acid, 0.8 parts by weight of graphite powder and 0.3 parts by weight of sodium nitrate in the first beaker according to the proportion by weight. After stirrin...

Example Embodiment

[0058] Example two

[0059] According to the molar ratio of 1:2.1, take polyethylene glycol diglycidyl ether and isophorone diamine and mix them uniformly, and carry out addition chain extension reaction at 60°C for 4 hours to introduce hydrophilic groups on the primary amino groups. The amino-terminated hydrophilic polyether segment is obtained. According to the molar ratio of 2.1:1, the amino-terminated hydrophilic polyether segment and E44 epoxy resin were subjected to addition chain extension reaction at 60°C for 3h to obtain an amino-terminated long-chain non-ionic self-emulsifying epoxy curing agent.

[0060] The ultrasonic-assisted Hummers method is used to prepare low-oxidation graphene. The specific steps are as follows: (1) Take 100 parts by weight of 98% concentrated sulfuric acid, 1.0 part by weight of graphite powder and 0.5 part by weight of sodium nitrate in the first beaker according to the weight ratio. After stirring for 1 hour at 2°C, add 4 parts by weight of po...

Example Embodiment

[0064] Example three

[0065] According to the molar ratio of 1:2.05, take triethylene glycol diglycidyl ether and p-xylylenediamine and mix them uniformly, and carry out addition chain extension reaction at 63℃ for 3.5h, thereby introducing hydrophilic groups on the primary amino groups. The amino-terminated hydrophilic polyether segment is obtained. According to the molar ratio of 2.05:1, the amino-terminated hydrophilic polyether segment and the E20 epoxy resin were subjected to addition chain extension reaction at 63° C. for 3.5 hours to obtain an amino-terminated long-chain non-ionic self-emulsifying epoxy curing agent.

[0066] The ultrasonic-assisted Hummers method is used to prepare low-oxidation graphene. The specific steps are as follows: (1) Take 100 parts by weight of 98% concentrated sulfuric acid, 1.2 parts by weight of graphite powder, and 0.7 parts by weight of sodium nitrate in the first beaker. After stirring for 1 hour at 0°C, add 6 parts by weight of potassium ...

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Abstract

The invention relates to a synthetic method of a graphene-waterborne epoxy high-dispersion system. The method comprises steps as follows: step 1, glycidyl ether type epoxy resin and double-end amino micromolecular amine are subjected to an addition chain extension reaction, and an amino-terminated hydrophilic polyether chain segment is obtained; step 2, the amino-terminated hydrophilic polyether chain segment and a macromolecular epoxy group are subjected to an addition chain extension reaction, and an amino-terminated long-chain non-ionic self-emulsifying epoxy curing agent is obtained; step 3, low-oxidation graphene is prepared with an ultrasonic assisted Hummers method; step 4, the non-ionic self-emulsifying epoxy curing agent and low-oxidation graphene are subjected to a covalent grafting modification reaction, and the graphene-waterborne epoxy high-dispersion system is obtained. The synthetic method has the advantages as follows: the long-chain non-inoic self-emulsifying epoxy curing agent is grafted on the surface of graphene through a nucleophilic opening ring reaction, re-agglomeration of a graphene sheet layer is inhibited to a certain extent, the electric conductivity of graphene is retained, and the comprehensive mechanical performance and modulus of the graphene-waterborne epoxy high-dispersion system are improved effectively.

Description

technical field [0001] The invention relates to a graphene-water-based epoxy high dispersion system and a synthesis method thereof, in particular to the preparation of a nonionic self-emulsifying epoxy curing agent, the preparation of low-oxidation graphene and the nonionic self-emulsifying epoxy curing agent. The invention discloses a method for modifying low-oxidation graphene with an epoxy curing agent, which belongs to the technical field of chemical organic synthesis new materials. Background technique [0002] Graphene is a new two-dimensional honeycomb carbonaceous material. Due to its unique structure, it not only has excellent electrical, thermal, and optical properties, but also exhibits good mechanical properties. The ideal graphene structure has a tensile strength as high as 130GPa and a Young's modulus of 1100GPa, which is a hundred times that of ordinary steel. In addition, the specific surface of graphene is as high as 2630g / ㎡, which makes it a two-dimensional...

Claims

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Application Information

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IPC IPC(8): C08G59/50C08G59/22C08G65/333C08G81/00C09D163/00C09D187/00C09D5/10C09D7/12C04B28/04
CPCC04B28/04C08G59/22C08G59/502C08G59/5026C08G59/5033C08G59/504C08G65/33306C08G65/3331C08G65/33313C08G81/00C08K3/04C08K7/00C08K2003/0893C09D5/106C09D163/00C09D187/005C04B14/06C04B14/02C04B2103/302C04B2103/0068C04B2103/50C04B14/024C04B24/281C04B18/08C04B18/141C04B18/146
Inventor 朱殿奎沈志明杨亚萍李晴李文陈涛孙涛
Owner 江苏丰彩建材(集团)有限公司
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