A kind of preparation method of super high strength concrete

An ultra-high-strength, concrete technology, used in anti-corrosion coatings, conductive coatings, epoxy resin coatings, etc., can solve problems to be studied, heavy steel connection workload, hidden structural safety hazards, etc., to reduce usage and improve market competition. power and reduce production costs

Active Publication Date: 2019-08-13
江苏丰彩建材(集团)有限公司 +1
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  • Summary
  • 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 a free state and has not been grafted into the cured product of epoxy resin and curing agent. Therefore, whether the epoxy resin composite material has the enhanced performance of oxidized nano-carbon materials remains to be studied.
At this stage, the most reliable connection technology for longitudinal steel bars is sleeve grouting connection technology, but the workload of grouting steel bars one by one is heavy, and there is no effective detection method to detect the connection quality of grouting sleeves. There are great risks to safety

Method used

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  • A kind of preparation method of super high strength concrete
  • A kind of preparation method of super high strength concrete
  • A kind of preparation method of super high strength concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] According to the molar ratio of 1:2.0, take polyethylene glycol diglycidyl ether and triethylenetetramine and mix them uniformly, then carry out addition chain extension reaction at 65°C for 3 hours, so as to introduce hydrophilic groups on the primary amino groups to obtain terminal 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 °C for 4 hours to obtain the amino-terminated long-chain nonionic self-emulsifying epoxy curing agent (see figure 2 ).

[0054] Ultrasound-assisted Hummers method was used to prepare low-oxidation graphene, such as image 3 As shown, the specific steps are as follows: (1) according to the proportioning by weight, 100 parts by weight of 98% vitriol oil, 0.8 parts by weight of graphite powder and 0.3 parts by weight of sodium nitrate are placed in a beaker, and stirred for 1 hour a...

Embodiment 2

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

[0060] Adopt ultrasonic-assisted Hummers method to prepare graphene with low degree of oxidation, concrete steps are as follows: (1) according to the proportioning by weight, the 98% vitriol oil of 100 weight parts, 1.0 weight part graphite powder and 0.5 weight part sodium nitrate are placed in beaker one, in After stirring for 1 hour at 2°C, add 4 parts by weight of potassium...

Embodiment 3

[0065] According to the molar ratio of 1:2.05, take triethylene glycol diglycidyl ether and p-xylylenediamine and mix them evenly, then carry out addition chain extension reaction at 63°C for 3.5 hours, so as to introduce hydrophilic groups on the primary amino groups An amino-terminated hydrophilic polyether chain 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 nonionic self-emulsifying epoxy curing agent.

[0066] Adopt ultrasonic-assisted Hummers method to prepare low oxidation degree graphene, concrete steps are as follows: (1) get 98% vitriol oil of 100 parts by weight, 1.2 parts by weight of graphite powder and 0.7 parts by weight of sodium nitrate in beaker one according to the proportioning by weight, place in beaker one, in After stirring at 0°C for 1 hour, add 6 parts...

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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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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/50C08G59/22C08G65/333C08G81/00C09D163/00C09D187/00C09D5/10C09D5/24C04B28/04
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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