A strong graphene oxide agent and a preparation method and application thereof

Abstract

The application relates to a graphene oxide strong agent and a preparation method and application thereof, and raw materials for preparing the graphene oxide strong agent include a graphene oxide dispersion liquid, modified starch, polyethylene glycol, hydroxypropyl methyl cellulose, a polycarboxylic acid water reducing agent and water. Graphene has excellent mechanical properties and can be used as a filler to increase the compactness of concrete, but is limited in the application in concrete due to dispersion problems. A special dispersant is selected in the application, which can fully disperse graphene oxide to form a stable solution, prevent adsorption of graphene on a water reducing agent, and even maintain the stability of the solution after being compounded with other materials, so that the workability of concrete is improved and the strength of the concrete is improved.

Description

A potent graphene oxide agent, its preparation method and application Technical Field

[0001] This invention belongs to the field of potentiating agents, and relates to a graphene oxide potentiating agent, its preparation method, and its application. Background Technology

[0002] With the rapid development of my country's economy, the government's requirements for energy conservation, emission reduction, and environmental protection are increasingly stringent. Especially after the concept of "carbon peaking and carbon neutrality" was proposed, the requirements for carbon emissions will inevitably become more stringent. Currently, concrete is the most widely used and consumed building material in modern society, and China is the world's largest consumer of concrete. With the country's massive investment in infrastructure and the urgent need for urbanization, the consumption of concrete and related materials in my country has shown a slow but steady growth trend in the short term. However, cement, an essential material for concrete, ranks among the top contributors to carbon emissions during its production process in China. Therefore, reducing cement usage to reduce carbon emissions is a viable option. Of course, this must be done without compromising the performance of concrete, especially its compressive strength.

[0003] To further improve the performance of concrete, existing technologies typically involve adding a strengthening agent. The strengthening agent has two main functions: first, it increases the dispersibility of concrete materials, allowing the concrete particles to disperse fully and preventing them from agglomerating, thereby accelerating the cement hydration process and reducing the amount of cement used in the concrete; second, it increases the adsorption capacity of other concrete additives, such as water-reducing agents, on concrete materials, enhancing their performance.

[0004] Currently, existing strength enhancers in concrete materials have a narrow range of applications and are quite sensitive to material properties. Adding strength enhancers to concrete results in poor water binding, leading to decreased workability during mixing, or uneven distribution of the strength enhancer, causing a decrease in concrete strength. The problem of simultaneously improving concrete workability and strength is frequently encountered. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a graphene oxide potentiator, its preparation method and application.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a graphene oxide activator, wherein the raw materials for preparing the graphene oxide activator include graphene oxide dispersion, modified starch, polyethylene glycol, hydroxypropyl methylcellulose, polycarboxylate superplasticizer and water.

[0008] The high-efficiency agent described in this invention not only does not adsorb the "water-reducing agent," but also has a certain "water-reducing effect." After adding the graphene oxide high-efficiency agent, the slump, spread, and flow rate of the concrete are significantly increased. After the graphene oxide is fully dispersed, it can play a filling role, increase the density of the concrete, and thus improve its strength. Moreover, graphene oxide, modified starch, polyethylene glycol, hydroxypropyl methylcellulose, and polycarboxylate water-reducing agent have a certain synergistic effect on the above-mentioned effects.

[0009] Preferably, the raw materials for preparing the graphene oxide activator include, by mass parts, 20-40 parts of graphene oxide dispersion, 0.05-0.3 parts of modified starch, 0.5-5 parts of polyethylene glycol, 0.1-5 parts of hydroxypropyl methylcellulose, 1-10 parts of polycarboxylate superplasticizer, and water.

[0010] The mass fractions of the graphene oxide dispersion can be selected from 20 parts, 22 parts, 25 parts, 28 parts, 30 parts, 32 parts, 35 parts, 38 parts, 40 parts, etc.; the mass fractions of the modified starch can be selected from 0.05 parts, 0.1 parts, 0.15 parts, 0.2 parts, 0.25 parts, 0.3 parts, etc.; the mass fractions of the polyethylene glycol can be selected from 0.5 parts, 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, etc.; and the mass fractions of the hydroxypropyl methylcellulose... The number of parts can be selected as 0.1 parts, 0.5 parts, 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, etc. The mass fraction of the polycarboxylate superplasticizer can be selected as 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, 5.5 parts, 6 parts, 6.5 parts, 7 parts, 7.5 parts, 8 parts, 8.5 parts, 9 parts, 9.5 parts, 10 parts, etc. Other specific values ​​within the above range can be selected, which will not be elaborated here.

[0011] Preferably, the graphene oxide dispersion comprises graphene oxide and a dispersion.

[0012] Preferably, the dispersion comprises sodium dodecyl diphenyl ether disulfonate, N,N-dimethylformamide, and ethanol.

[0013] The dispersion of the present invention is more conducive to the long-term stable dispersion of graphene oxide, and can better balance its long-term stable dispersion in aqueous solution and concrete. It can also improve the workability of concrete and increase its strength. Furthermore, sodium dodecyl diphenyl ether disulfonate, N,N-dimethylformamide and ethanol have a certain synergistic effect on the above-mentioned effects.

[0014] Preferably, the mass ratio of sodium dodecyl diphenyl ether disulfonate, N,N-dimethylformamide and ethanol in the dispersion is (0.1-10):(3-10):(5-20).

[0015] The specific point values ​​in (0.1-10) can be selected from 0.1, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, etc.; the specific point values ​​in (3-10) can be selected from 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, etc.; and in (5-20)... The specific point values ​​can be selected from 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, 13, 13.5, 14, 14.5, 15, 15.5, 16, 16.5, 17, 17.5, 18, 18.5, 19, 19.5, 20, etc. Other specific point values ​​within the above range can also be selected, which will not be elaborated here.

[0016] Preferably, the graphene oxide dispersion contains 0.5%-20% graphene oxide by mass, such as 0.5%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, etc. Other specific values ​​within the above range can be selected, and will not be elaborated here.

[0017] Preferably, the particle size of the graphene oxide is 1-500nm, such as 1nm, 10nm, 50nm, 100nm, 150nm, 200nm, 250nm, 300nm, 350nm, 400nm, 450nm, 500nm, etc. Other specific values ​​within the above range can be selected, and will not be elaborated here.

[0018] Preferably, the degree of polymerization of the polyethylene glycol is 200-800, such as 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, etc. Other specific values ​​within the above range can be selected, and will not be elaborated here.

[0019] Preferably, the raw materials for preparing the graphene oxide activator also include an antifoaming agent.

[0020] Preferably, the defoamer is in the range of 0.001-0.2 parts by mass, for example, 0.001 parts, 0.005 parts, 0.01 parts, 0.015 parts, or 0.02 parts. Other specific values ​​within the above range can be selected, and will not be elaborated here.

[0021] Preferably, the defoamer includes modified polyether, emulsifier, and dispersant.

[0022] In a second aspect, the present invention provides a method for preparing a graphene oxide stimulant according to the first aspect, the method comprising: mixing a graphene oxide dispersion, a polycarboxylate superplasticizer and water, sonicating, and then mixing with modified starch, polyethylene glycol and hydroxypropyl methylcellulose to obtain the desired product.

[0023] Preferably, the ultrasound duration is 20-60 minutes and the ultrasound frequency is 20-60 kHz.

[0024] The ultrasound duration can be selected from 20 min, 25 min, 30 min, 35 min, 40 min, 45 min, 50 min, 55 min, 60 min, etc., and the ultrasound frequency can be selected from 20 kHz, 25 kHz, 30 kHz, 35 kHz, 40 kHz, 45 kHz, 50 kHz, 55 kHz, 60 kHz, etc. Other specific values ​​within the above range can be selected, which will not be elaborated here.

[0025] Thirdly, the present invention provides an application of the graphene oxide intensive agent according to the first aspect in concrete.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The potent agent described in this invention has two main functions: firstly, it acts as a water-reducing agent; secondly, it enhances the strength of concrete. Therefore, special attention must be paid to the individual properties and interactions of the materials when selecting them. Graphene has attracted much attention due to its excellent mechanical properties and its potential as a filler to increase the density of concrete. However, its dispersion problems limit its application in concrete. While many studies have explored oxidizing and dispersing graphene oxide to prepare admixtures, these methods still suffer from problems such as agglomeration and stratification, preventing long-term stable storage. This invention selects a multi-component dispersant to disperse graphene oxide, which is then compounded with other components to prepare a potent graphene oxide agent. This agent can fully disperse graphene oxide to form a stable solution, prevent the adsorption of water-reducing agents by graphene, and maintain solution stability even after being compounded with other materials. This improves the workability of concrete while simultaneously increasing its strength.

[0028] Multi-component dispersants are more conducive to the long-term stable dispersion of graphene oxide. The synergistic effect of compounding with other functional components can better balance its long-term stable dispersion in aqueous solutions and concrete, and can improve the workability and strength of concrete. The stable dispersed graphene oxide strong agent not only does not adsorb the "water-reducing agent", but also has a certain "water-reducing effect". After adding the graphene oxide strong agent, the slump, spread and flow rate of the concrete are significantly increased. After the graphene oxide is fully dispersed, it can play a filling role, increase the density of concrete, and thus improve its strength. Detailed Implementation

[0029] To further illustrate the technical means and effects of the present invention, the following describes the technical solution of the present invention in conjunction with preferred embodiments of the present invention. However, the present invention is not limited to the scope of the embodiments.

[0030] The sources of the active ingredients in the products involved in the following examples and comparative examples are as follows (only the active ingredients are shown; the necessary excipients contained in other commercially available raw materials are not described):

[0031] The graphene oxide was purchased from a product called "Research Ultrapure Single-Layer Graphene Oxide" from Shenzhen Suiheng Graphene Technology Co., Ltd.

[0032] The modified starch was sourced from a product called hydroxypropyl starch purchased from Chengchi Food Ingredients Company.

[0033] The polyethylene glycol was purchased from a chemical raw material wholesaler and its product was named polyethylene glycol 400 (PEG400).

[0034] Hydroxypropyl methylcellulose was purchased from Chuangsheng Building Materials Chemical Company and its product was traded under the name Hydroxypropyl Methylcellulose (HPMC).

[0035] The polycarboxylate superplasticizer was purchased from a product called polycarboxylate superplasticizer from Kezhijie New Materials Group Co., Ltd.

[0036] The defoamer was purchased from Shenzhen Dianshiyuan Water Treatment Technology Co., Ltd. and its product name was... B-PO defoamer products.

[0037] Example 1

[0038] This embodiment provides a graphene oxide stimulant, the composition of which is: 1.5 parts graphene oxide, 12 parts ethanol, 8 parts N,N-dimethylformamide, 1 part sodium dodecyl diphenyl ether disulfonate, 0.1 parts modified starch, 2 parts polyethylene glycol, 0.3 parts hydroxypropyl methylcellulose, 3 parts polycarboxylate superplasticizer, 0.003 parts defoamer, and water as the balance.

[0039] The preparation method is as follows: ethanol, N,N-dimethylformamide, sodium dodecyl diphenyl ether disulfonate, polycarboxylic acid water-reducing agent are mixed with water, then mixed with graphene oxide, sonicated for 1 hour, and then mixed with modified starch, polyethylene glycol, hydroxypropyl methylcellulose and defoamer to obtain the final product.

[0040] Example 2

[0041] This embodiment provides a graphene oxide stimulant, the stimulant being composed of: 5 parts graphene oxide, 5 parts ethanol, 10 parts N,N-dimethylformamide, 10 parts sodium dodecyl diphenyl ether disulfonate, 0.3 parts modified starch, 5 parts polyethylene glycol, 5 parts hydroxypropyl methylcellulose, 1 part polycarboxylate superplasticizer, 0.2 parts defoamer, and the balance being water.

[0042] The preparation method is as follows: ethanol, N,N-dimethylformamide, sodium dodecyl diphenyl ether disulfonate, polycarboxylic acid water-reducing agent are mixed with water, then mixed with graphene oxide, sonicated for 1 hour, and then mixed with modified starch, polyethylene glycol, hydroxypropyl methylcellulose and defoamer to obtain the final product.

[0043] Example 3

[0044] This embodiment provides a graphene oxide stimulant, the stimulant being composed of: 0.5 parts graphene oxide, 20 parts ethanol, 3 parts N,N-dimethylformamide, 0.5 parts sodium dodecyl diphenyl ether disulfonate, 0.05 parts modified starch, 0.5 parts polyethylene glycol, 0.1 parts hydroxypropyl methylcellulose, 10 parts polycarboxylate superplasticizer, 0.001 parts defoamer, and the balance being water.

[0045] The preparation method is as follows: ethanol, N,N-dimethylformamide, sodium dodecyl diphenyl ether disulfonate, polycarboxylic acid water-reducing agent are mixed with water, then mixed with graphene oxide, sonicated for 1 hour, and then mixed with modified starch, polyethylene glycol, hydroxypropyl methylcellulose and defoamer to obtain the final product.

[0046] Example 4

[0047] This embodiment provides a graphene oxide potentiator, which differs from Example 1 only in that it does not contain ethanol, and its reduced mass is proportionally allocated to the mass of N,N-dimethylformamide and sodium dodecyl diphenyl ether disulfonate, while other components and contents remain unchanged.

[0048] The preparation method is the same as in Example 1.

[0049] Example 5

[0050] This embodiment provides a graphene oxide potentiator, which differs from Example 1 only in that it does not contain N,N-dimethylformamide, and its reduced mass is proportionally allocated to the mass of ethanol and sodium dodecyl diphenyl ether disulfonate, while other components and contents remain unchanged.

[0051] The preparation method is the same as in Example 1.

[0052] Example 6

[0053] This embodiment provides a graphene oxide potentiator, which differs from Example 1 only in that it does not contain sodium dodecyl diphenyl ether disulfonate, and its reduced mass is proportionally allocated to the mass of ethanol and N,N-dimethylformamide, while other components and contents remain unchanged.

[0054] The preparation method is the same as in Example 1.

[0055] Comparative Example 1

[0056] This comparative example provides a graphene oxide stimulant, which differs from Example 1 only in that it does not contain modified starch, and the reduced mass of modified starch is proportionally distributed to the mass of polyethylene glycol, hydroxypropyl methylcellulose, polycarboxylate superplasticizer, and graphene oxide, while other components and contents remain unchanged.

[0057] The preparation method is the same as in Example 1.

[0058] Comparative Example 2

[0059] This comparative example provides a graphene oxide stimulant, which differs from Example 1 only in that it does not contain polyethylene glycol, and its reduced mass is proportionally distributed to the mass of modified starch, hydroxypropyl methylcellulose, polycarboxylate superplasticizer, and graphene oxide, while other components and contents remain unchanged.

[0060] The preparation method is the same as in Example 1.

[0061] Comparative Example 3

[0062] This comparative example provides a graphene oxide stimulant, which differs from Example 1 only in that it does not contain hydroxypropyl methylcellulose. The reduced mass of hydroxypropyl methylcellulose is proportionally distributed to the mass of modified starch, polyethylene glycol, polycarboxylate superplasticizer, and graphene oxide, while other components and contents remain unchanged.

[0063] The preparation method is the same as in Example 1.

[0064] Comparative Example 4

[0065] This comparative example provides a graphene oxide stimulant, which differs from Example 1 only in that it does not contain graphene oxide. The reduced mass of graphene oxide is proportionally distributed to the mass of modified starch, polyethylene glycol, polycarboxylate superplasticizer, and hydroxypropyl methylcellulose, while other components and contents remain unchanged.

[0066] The preparation method is the same as in Example 1.

[0067] Comparative Example 5

[0068] This comparative example provides a graphene oxide stimulant, which differs from Example 1 only in that it does not contain polycarboxylate superplasticizer. Instead, the reduced mass of polycarboxylate superplasticizer is proportionally distributed to the mass of graphene oxide, modified starch, polyethylene glycol, and hydroxypropyl methylcellulose, while other components and contents remain unchanged.

[0069] The preparation method is the same as in Example 1.

[0070] Comparative Example 6

[0071] This comparative example provides a graphene oxide potentiator, the potentiator being composed of: 1.5 parts graphene oxide, 12 parts ethanol, 0.1 parts modified starch, 2 parts polyethylene glycol, 0.3 parts hydroxypropyl methylcellulose, 0.003 parts defoamer, and the balance being water.

[0072] The preparation method is the same as in Example 1.

[0073] Comparative Example 7

[0074] This comparative example provides a graphene oxide potentiator, the potentiator being composed of: 10 parts N,N-dimethylformamide, 1.5 parts graphene oxide, 0.1 parts modified starch, 2 parts polyethylene glycol, 0.3 parts hydroxypropyl methylcellulose, 0.003 parts defoamer, and the balance being water.

[0075] The preparation method is the same as in Example 1.

[0076] Comparative Example 8

[0077] This comparative example provides a graphene oxide potentiator, the potentiator being composed of: 5 parts sodium dodecyl diphenyl ether disulfonate, 1.5 parts graphene oxide, 0.1 parts modified starch, 2 parts polyethylene glycol, 0.3 parts hydroxypropyl methylcellulose, 0.003 parts defoamer, and the balance being water.

[0078] The preparation method is the same as in Example 1.

[0079] Comparative Example 9

[0080] This comparative example provides a graphene oxide intensive agent, the composition of which is: 4 parts polycarboxylate superplasticizer, 1.5 parts graphene oxide, 0.1 parts modified starch, 2 parts polyethylene glycol, 0.3 parts hydroxypropyl methylcellulose, 0.003 parts defoamer, and water as the balance.

[0081] The preparation method is the same as in Example 1.

[0082] Comparative Example 10

[0083] This comparative example provides a graphene oxide stimulant, the stimulant being composed of: 12 parts ethanol, 8 parts N,N-dimethylformamide, 5 parts sodium dodecyl diphenyl ether disulfonate, 1.5 parts graphene oxide, and the balance being water.

[0084] The preparation method is the same as in Example 1.

[0085] Comparative Example 11

[0086] This comparative example provides a graphene oxide potentiator, which differs from Example 1 only in that it does not contain modified starch, and the reduced mass of modified starch is allocated to the mass of polyethylene glycol, while other components and contents remain unchanged.

[0087] The preparation method is the same as in Example 1.

[0088] Comparative Example 12

[0089] This comparative example provides a graphene oxide potentiator, which differs from Example 1 only in that it does not contain polyethylene glycol, and the reduced mass of polyethylene glycol is allocated to the mass of modified starch, while other components and contents remain unchanged.

[0090] The preparation method is the same as in Example 1.

[0091] Test Example 1

[0092] Stability test

[0093] The graphene oxide stimulants prepared in Example 1 and Comparative Examples 6-9 were left to stand and the layering phenomenon was observed. The results are shown in Table 1.

[0094] Table 1

[0095] Sample Results: Example 1: No stratification occurred after 3 months of standing. Comparative Example 6: Stratification began to occur after 10 days of standing. Comparative Example 7: Stratification began to occur after 12 days of standing. Comparative Example 8: Stratification began to occur after 7 days of standing. Comparative Example 9: Stratification began to occur after 5 days of standing. surface

[0096] Test Example 2

[0097] Performance testing of high-strength concrete:

[0098] The workability and workability of concrete were tested according to GB / T50080-2016 "Standard for Test Methods of Performance of Ordinary Concrete Mixtures"; the compressive strength of concrete was tested according to GB / T50081-2019 "Standard for Test Methods of Physical and Mechanical Properties of Ordinary Concrete". The results are shown in Table 2.

[0099] The intensive agents described in Examples 1-6 and Comparative Examples 1-12 were incorporated into the concrete at a rate of 0.8% of the gel material.

[0100] C30 standard group 1 concrete mix proportion: cement 220kg / m³ 3 Mineral powder 80kg / m 3 fly ash 60kg / m³ 3 Stone 990kg / m 3 Sand 870kg / m 3 Additive (3.0%) 10.8 kg / m³ 3 170 kg / m³ of water 3 .

[0101] The concrete mix proportion of the test sample group: except for the addition of 2.88 kg / m³ 3 Apart from the strengthening agent, the composition and quality of other concrete materials remain unchanged, and the process parameters and operating steps are the same as those of C30 standard group 1.

[0102] Table 2

[0103]

[0104]

[0105] Current research indicates that the dispersion of graphene oxide limits its application in concrete. Therefore, based on the multi-component dispersed graphene oxide experiments mentioned in CN116043054A, and combined with the results of Test Example 1, the workability and slump of the concrete show that the more stable the dispersion of the graphene oxide accumulator, the better its workability in concrete. When graphene oxide cannot be uniformly and stably dispersed, it may be due to its high surface energy, making it prone to aggregation and adsorption of other components, resulting in poor concrete workability. This further confirms the importance of stable dispersion of graphene oxide in concrete. The concrete strength data from Comparative Example 4 and C30 Standard 1 show that graphene oxide did not improve concrete strength in these cases. Combined with the results of Comparative Example 10, it is clear that stable dispersion of graphene oxide in the accumulator does not necessarily mean it can be fully dispersed in concrete. Comparing the experimental data of Example 1 (where the concrete not only has good workability but also improved strength) and Comparative Example 5, it can be seen that the presence of polycarboxylate superplasticizer allows graphene oxide to be better dispersed in concrete, thereby improving the strength of concrete while ensuring its workability. Graphene oxide not only needs to be stably dispersed in solution for a long time, but also needs to be fully dispersed in concrete to simultaneously achieve both workability and strength.

[0106] The results of Examples 4-6 show that the composition of the dispersion has a significant impact on the strength and condition of concrete. Ethanol, sodium dodecyl diphenyl ether disulfonate, and N,N-dimethylformamide in the dispersion exhibit a certain synergistic effect in these aspects. The data in the table show that modified starch and polyethylene glycol have a synergistic effect in improving the water retention of concrete, while hydroxypropyl methylcellulose can improve the adhesion of concrete. Graphene oxide dispersion alone, or the combination of other raw materials excluding graphene dispersion, cannot improve the condition and strength of concrete. Only by combining these two components can they better function in concrete, thereby synergistically improving the condition and strength of concrete. Graphene oxide, modified starch, polyethylene glycol, hydroxypropyl methylcellulose, and polycarboxylate superplasticizer have a certain synergistic effect in improving the strength of concrete.

[0107] Based on the above tests, the workability and compressive strength of the concrete were compared with the benchmark after reducing the amount of cement by 20 kg and adding graphene oxide strengthening agent. The results are shown in Table 3.

[0108] C30 standard group 2 concrete mix proportion: cement 220kg / m³ 3 Mineral powder 80kg / m 3 fly ash 60kg / m³ 3 Stone 1020kg / m 3 400 kg / m³ of manufactured sand 3 , yellow sand 450kg / m3 Additive (dosage 3.2%) 11.52 kg / m³ 3 170 kg / m³ of water 3

[0109] Concrete mix proportion for the test sample group: cement 200kg / m³ 3 Mineral powder 80kg / m 3 fly ash 60kg / m³ 3 Stone 1030kg / m 3 410 kg / m³ of manufactured sand 3 , yellow sand 450kg / m 3 Additive (dosage 3.2%) 10.88 kg / m³ 3 170 kg / m³ of water 3 High-efficiency agent (dosage 0.8%) 2.72 kg / m³ 3 The process parameters and operating procedures are the same as those of C30 reference group 2.

[0110] Table 3

[0111]

[0112] As shown in Table 3, in terms of workability and compressive strength, when the amount of cement is reduced by 20 kg, the workability and compressive strength of the concrete with graphene oxide activator (Example 1) can still reach the benchmark level (C30 benchmark 2). The concrete strength of Comparative Example 4, which only adds other raw materials, and Comparative Example 10, which only adds graphene oxide dispersion, is not improved, and is even 2-4 MPa lower than the benchmark.

[0113] The applicant declares that this invention illustrates a graphene oxide potentiator, its preparation method, and its application through the above embodiments. However, this invention is not limited to the above embodiments, meaning that this invention does not necessarily rely on the above embodiments for implementation. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of raw materials, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection and disclosure scope of this invention.

[0114] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0115] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. A potent agent for graphene oxide, characterized in that, The raw materials for preparing the graphene oxide activator include, by mass parts, 20-40 parts of graphene oxide dispersion, 0.05-0.3 parts of modified starch, 0.5-5 parts of polyethylene glycol, 0.1-5 parts of hydroxypropyl methylcellulose, 1-10 parts of polycarboxylate superplasticizer, and water; the graphene oxide dispersion comprises graphene oxide and a dispersion; the dispersion comprises sodium dodecyl diphenyl ether disulfonate, N,N-dimethylformamide, and ethanol; the mass ratio of sodium dodecyl diphenyl ether disulfonate, N,N-dimethylformamide, and ethanol in the dispersion is (0.1-10):(3-10):(5-20); the mass percentage of graphene oxide in the graphene oxide dispersion is 0.5-20%; and the modified starch is hydroxypropyl starch.

2. The graphene oxide potentiator according to claim 1, characterized in that, The graphene oxide has a particle size of 1-500 nm.

3. The graphene oxide potentiator according to claim 1, characterized in that, The degree of polymerization of the polyethylene glycol is 200-800.

4. The graphene oxide potentiator according to claim 1, characterized in that, The raw materials for preparing the graphene oxide potentiator also include defoamers.

5. The graphene oxide potentiator according to claim 4, characterized in that, The defoamer is present in parts by weight of 0.001-0.2 parts.

6. The graphene oxide potentiator according to claim 4 or 5, characterized in that, The defoamer includes modified polyether, emulsifier, and dispersant.

7. The method for preparing the graphene oxide potentiator according to any one of claims 1-6, characterized in that, The preparation method includes: mixing graphene oxide dispersion, polycarboxylic acid water-reducing agent and water, sonicating, and then mixing with modified starch, polyethylene glycol and hydroxypropyl methylcellulose to obtain the final product.

8. The method for preparing the graphene oxide potentiator according to claim 7, characterized in that, The duration of the ultrasound is 20-60 minutes, and the frequency of the ultrasound is 20-60 kHz.

9. The application of the graphene oxide intensive agent according to any one of claims 1-6 in concrete.

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