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Production method and application of micro-nano crystal nucleus compound material

A composite material and micro-nano crystal technology, applied in the field of cement-based material admixtures, can solve the problems of easy agglomeration of C-S-H, achieve excellent concrete durability, promote hydration, and highlight the effect of early strength

Active Publication Date: 2020-02-14
BEIJING INST OF CLOTHING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN106746834B and CN106315573B adopted the in-situ precipitation method, and utilized C-S-H to achieve the purpose of dispersing graphene or graphene oxide, but C-S-H itself is easy to reunite and does not fundamentally solve the problem

Method used

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  • Production method and application of micro-nano crystal nucleus compound material
  • Production method and application of micro-nano crystal nucleus compound material
  • Production method and application of micro-nano crystal nucleus compound material

Examples

Experimental program
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Effect test

preparation example 1

[0044] With 25kg methallyl polyoxyethylene ether (molecular weight 1200), 5kg end group is the isobutyl polyoxyethylene ether (molecular weight 500) of phenyl, 0.58kg mass fraction is 30% hydrogen peroxide and 70kg deionized water Prepare the base material and add it to the reaction kettle, heat and stir until the temperature rises to 80°C; mix 0.2kg sodium bisulfite, 10kg itaconic acid, 10.4kg 2-acrylamide-2-methylpropanesulfonic acid, 0.1kg 2- Mixed solution of methyl styrene and 0.2kg propyl methacrylate was added dropwise to the base material, and the dropwise addition was completed in 3 hours and kept warm for 2 hours. Afterwards, 30 kg of 2% sodium hydroxide solution was added dropwise and kept for 1 hour, the temperature was lowered to less than 45° C., and water was added to adjust the solid content to obtain a 20% polymer solution.

preparation example 2

[0046] 30kg of isopentenyl polyoxyethylene ether (molecular weight: 3000), 70kg of N-methylpyrrolidone, and 1.28kg of butyl acrylate were added to the reaction kettle, heated and stirred until the temperature rose to 60 ℃; 0.27kg of azobisisobutyronitrile and 30kg of methacrylic acid were added dropwise to the base material respectively, and the dropwise addition was completed within 3 hours. Then add 20kg of 2% sodium hydroxide solution dropwise for 1 hour, keep warm for 1 hour, cool down to less than 45°C, add water to adjust the solid content to prepare a 20% polymer solution.

preparation example 3

[0048] With 30kg acetone, 1.64kg dibenzoyl peroxide, 10kg isopentenyl polyoxyethylene ether (molecular weight is 2400), 200kg2-acrylamido-2-methylpropionic acid, 6.7kg N-methyl perfluoro Octane sulfonamido ethyl acrylate is made into a mixed solution and added to the reaction kettle, heated and stirred until the temperature rises to 50°C, and kept for 5 hours. Afterwards, 30 kg of 2% sodium hydroxide solution was added dropwise and kept for 1 hour, the temperature was lowered to less than 45° C., and water was added to adjust the solid content to obtain a 20% polymer solution.

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Abstract

The invention provides a micro-nano crystal nucleus compound material and a production method and application thereof. The compound material contains graphene oxide and / or chemically-grafted modifiedgraphene oxide, hydrated calcium silicate and a high-molecular polymer. By means of the micro-nano crystal nucleus compound material and the production method and application thereof, a graphene oxidecompound with high dispersity can be obtained, and not only is hydration of a cement-based material promoted to make the cement-based material have outstanding early strength, but also the cement-based material has excellent concrete durability.

Description

technical field [0001] The invention belongs to the technical field of cement-based material admixtures, and in particular relates to a micro-nano crystal nucleus composite material, a preparation method and an application thereof. Background technique [0002] The setting and strength development of concrete affect the early construction and later service performance of concrete. The incorporation of various chemical admixtures has an important impact on the setting and strength development of cement concrete. In the process of rapid development of modern urban construction, some special projects, such as prefabricated component products, low-temperature construction and emergency reinforcement projects, urgently need to improve the early strength of cement-based materials, especially in the precast concrete production process, the cycle of demoulding and maintenance Longer, thereby reducing production efficiency and increasing the production cost of precast concrete. Alt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32C08F283/06C08F220/58C08F220/06C08F230/02C08F220/18C08F220/54C08F292/00C08F222/02
CPCC04B40/0039C08F283/065C08F292/00C08F220/06C08F230/02C08F220/54C08F222/02C04B14/024C04B22/00C04B24/32
Inventor 张力冉王栋民李宏伟
Owner BEIJING INST OF CLOTHING TECH