Preparation method of double-electric ionic liquid corrosion inhibition bactericide

Abstract

The invention relates to a double-electric ionic liquid corrosion inhibition bactericide with corrosion inhibition and sterilization performance. The invention explores a green, environment-friendly and simple synthetic method for preparing the ionic liquid corrosion inhibition bactericide. 2-bromoethyl sodium sulfonate (BES) is used as a matrix, aminoethyl piperazine (AEP) and 4-aminopyridine (4AP) are respectively modified on the matrix by utilizing bromination reaction, two ionic liquids are formed while the corrosion inhibition performance is improved, and the bactericidal performance is introduced by virtue of double electricity, so that the double-electricity type ionic liquid corrosion inhibition bactericide with good corrosion inhibition and bactericidal performance is finally obtained.

Description

Technical Field

[0001] The invention relates to a dual-charge ionic liquid corrosion inhibitor and bactericidal agent with corrosion inhibition and bactericidal performance and a preparation method thereof. Background Art

[0002] Metal corrosion is a kind of damage that occurs to metal materials in the external environment, which will cause a significant decrease in the various mechanical properties of the material. At the same time, in the fields of petrochemicals, microorganisms such as various bacteria, algae, etc., their metabolites will form an anaerobic environment on the surface of pipelines and equipment, causing microbial erosion and accelerating surface corrosion. In the field of corrosion inhibition and sterilization, ionic liquids have shown potential application value due to their special structure and performance. Traditional antiseptics and bactericides often have problems such as high toxicity, volatility, and environmental unfriendliness. In contrast, some specific types of ionic liquids can not only provide effective corrosion inhibition, but also reduce the impact on the environment due to their low volatility and low biological toxicity. In addition, by changing the type and ratio of anions and cations, ionic liquids with different functional characteristics can be designed, thereby achieving a selective protective effect for specific metal materials or microorganisms. Therefore, the present invention synthesizes two ionic liquids by modifying different groups, while improving the corrosion inhibition performance, introducing dual-electric bactericidal properties, and preparing a new type of dual-electric ionic liquid corrosion inhibitor bactericide. Summary of the invention

[0003] The purpose of the present invention is to provide a corrosion inhibitor and bactericide which can effectively protect metal from corrosion and provide excellent bactericidal performance and a preparation method thereof, so as to solve the current hidden dangers of metal corrosion and the problem of biological corrosion formed by protecting bacteria and microorganisms.

[0004] To achieve the above objectives, the present specification provides a method for preparing a dual-charged ionic liquid with corrosion inhibition and bactericidal properties, characterized in that the synthesized ionic liquid has both positive and negative charges, which improves the corrosion inhibition performance while introducing bactericidal properties and its lower biological toxicity can reduce the impact on the environment.

[0005] The implementation process of the present invention is briefly explained below.

[0006] (I) Preparation method of piperazine ionic liquids according to the present invention:

[0007] (1) Dissolve 2.11 g of sodium 2-bromoethylsulfonate and 1.29 g of aminoethylpiperazine in 5 ml of deionized water, respectively, and stir ultrasonically for 5 min to fully dissolve.

[0008] (2) Place the former solution in a two-necked flask and stir with a magnetic stirrer.

[0009] (3) Slowly add the latter solution dropwise into the flask and connect it to a condenser.

[0010] (4) Place the mixed solution in an oil bath and react for 6 hours.

[0011] (5) The product after the reaction is completed is distilled under vacuum until it becomes viscous.

[0012] (6) Drying the above product in a vacuum drying oven to obtain the final product, pyridinium ionic liquid.

[0013] (II) The preparation method of the pyridinium ionic liquid involved in the present invention:

[0014] (1) Dissolve 2.11 g of sodium 2-bromoethylsulfonate and 1.29 g of 4-aminopyridine in 5 ml of deionized water, respectively, and stir ultrasonically for 5 min to fully dissolve.

[0015] (2) Place the former solution in a two-necked flask and stir with a magnetic stirrer.

[0016] (3) Slowly add the latter solution dropwise into the flask and connect it to a condenser.

[0017] (4) Place the mixed solution in an oil bath and react for 6 hours.

[0018] (5) The product after the reaction is completed is distilled under vacuum until it becomes viscous.

[0019] (6) Drying the above product in a vacuum drying oven to obtain the final product, pyridinium ionic liquid.

[0020] Furthermore, in steps (1) and (2), the ultrasonic power is 750W.

[0021] Furthermore, in steps (1, 2) (4), the temperature of the oil bath is 60°C.

[0022] Further, in step (1, 2) (5), the pressure of vacuum distillation is 1.33 kPa

[0023] Furthermore, in steps (1, 2) (6), the pressure of the vacuum drying oven is 20 Pa, the temperature of the vacuum drying oven is 60° C., and the drying time is 12 h. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Attached Figure 1 AC impedance spectra of AEP-BES (a) and 4AP-BES (b).

[0025] Attached Figure 2 FTIR spectra of AEP-BES (a) and 4AP-BES.

[0026] Attached Figure 3 Corrosion rate and inhibition efficiency diagram of AEP-BES (a) and 4AP-BES.

[0027] Attached Figure 4 Macroscopic corrosion morphology of AEP-BES (a) and 4AP-BES.

[0028] Attached Figure 5 Bacterial fluorescence microscopy morphology of AEP-BES (a) and 4AP-BES.

[0029] Attached Figure 6 Bacterial killing rate diagram of AEP-BES (a) and 4AP-BES. DETAILED DESCRIPTION

[0030] The present invention relates to a dual-charge ionic liquid corrosion inhibitor and bactericidal agent with corrosion inhibition and bactericidal performance and a preparation method thereof. The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] Example 1

[0032] First, weigh 2.11g of sodium 2-bromoethylsulfonate and 1.29g of aminoethylpiperazine, and measure 5ml of deionized water respectively. Stir the solution with a magnetic stirrer for 5min to fully dissolve it. Place the former solution in a two-necked flask and connect a condenser to condense it. Slowly drop the latter solution into the flask for 5min. Place the mixed solution flask in a 60℃ oil bath and react for 6h. In order to improve the purity of the product, the product after the reaction is placed in a vacuum rotary evaporator and vacuum distilled to a viscous state at a pressure of 1.33kPa. Then place the above product in a vacuum drying oven at a pressure of 20Pa and a temperature of 60℃ and dry it for 12h to obtain the final product AEP-BES ionic liquid.

[0033] Example 2

[0034] First, weigh 2.11g of sodium 2-bromoethylsulfonate and 1.29g of 4-aminopyridine, measure 5ml of deionized water respectively, stir with a magnetic stirrer for 5min to fully dissolve them, place the former solution in a two-necked flask, connect a condenser to condense, slowly drop the latter solution into the flask for 5min, place the mixed solution flask in a 60℃ oil bath, and react for 6h. In order to improve the purity of the product, the product after the reaction is placed in a vacuum rotary evaporator and vacuum distilled to a viscous state at a pressure of 1.33kPa. Then place the above product in a vacuum drying oven at a pressure of 20Pa and a temperature of 60℃ and dry it for 12h to obtain the final product 4AP-BES ionic liquid.

[0035] Example 3

[0036] In this experimental example, the corrosive medium is 1M HCl solution, the working temperature is 25°C, and the corrosion inhibitors AEP-BES and 4AP-BES are added to the medium solution in different proportions. After the addition, the concentrations of the corrosion inhibitors are 50, 100, 150, and 200 mg / L. The static hanging method is used to detect the corrosion efficiency of the corrosion inhibitor. The steel sheet is the commonly used N80 steel, and the hanging time is 24 hours. The corrosion rate and corrosion efficiency under different concentration gradients are shown in the attached figure. Figure 3 shown.

[0037] The parts and English abbreviations not described in detail in this embodiment are common knowledge in the industry and can be searched on the Internet, so they are not described here one by one. The chemical reagents involved are available in the market.

[0038] The parts not described in the present invention can be realized by referring to the prior art.

[0039] It should be noted that all equivalent substitutions made by those skilled in the art under the guidance of the present invention should be within the protection scope of the present invention.

Claims

1. A method for preparing a dual-charge ionic liquid corrosion inhibitor and bactericide, (I) A method for preparing a piperazine ionic liquid (AEP-BES) according to the present invention, characterized in that: (1) Dissolve 2.11 g of sodium 2-bromoethylsulfonate and 1.29 g of aminoethylpiperazine in 5 ml of deionized water, respectively, and dissolve them thoroughly by ultrasonication. (2) Place the former solution in a two-necked flask and stir with a magnetic stirrer. (3) Slowly add the latter solution dropwise into the flask and connect it to a condenser. (4) Place the mixed solution in an oil bath and react for 6 hours. (5) The product after the reaction is completed is distilled under vacuum until it becomes viscous. (6) Drying the above product in a vacuum drying oven to obtain the final product, piperazine ionic liquid.

2. A method for preparing a dual-charge ionic liquid corrosion inhibitor and bactericide, (ii) a method for preparing a pyridinium ionic liquid (4AP-BES) according to the present invention, characterized in that: (1) Dissolve 2.11 g of sodium 2-bromoethylsulfonate and 1.29 g of 4-aminopyridine in 5 ml of deionized water, respectively, and stir ultrasonically for 5 min to fully dissolve. (2) Place the former solution in a two-necked flask and stir with a magnetic stirrer. (3) Slowly add the latter solution dropwise into the flask and connect a condenser. (4) Place the mixed solution in an oil bath and react for 6 hours. (5) The product after the reaction is completed is distilled under vacuum until it becomes viscous. (6) Drying the above product in a vacuum drying oven to obtain the final product, pyridinium ionic liquid.

3. The method for preparing the ionic liquid according to claim 1, 2, characterized in that: In steps (1) and (2) (1), the ultrasonic power is 750W.

4. The method for preparing the ionic liquid according to claim 1, 2, characterized in that: In steps (1, 2) (4), the temperature of the oil bath is 60°C.

5. The method for preparing the ionic liquid according to claim 1, 2, characterized in that: In steps (1, 2) (5), the pressure of the reduced pressure distillation is 1.33 kPa.

6. The method for preparing the ionic liquid according to claim 1, 2, characterized in that: In steps (1, 2) (6), the vacuum drying oven pressure is 20 Pa, the vacuum drying oven temperature is 60° C., and the drying time is 12 h.

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