CN111471444A - Polyamino bactericidal surfactant and preparation method and application thereof - Google Patents
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Abstract
The invention relates to a polyamino bactericidal surfactant, a preparation method and application thereof, wherein the method comprises the following steps: 1) mixing dipentaerythritol and caproyl chloride, and stirring and reacting for 2-4 hours at the temperature of 30-50 ℃ to obtain a viscous liquid intermediate I; 2) adding the viscous liquid intermediate I into a first solvent, adding powdery sodium hydroxide after the viscous liquid intermediate I is completely dissolved, stirring and reacting for 0.5-1 h at the temperature of 25-35 ℃, then adding 3-chloro-2-hydroxypropyl trimethyl ammonium chloride into the solution, heating to 70-90 ℃, reacting for 5-7 h, and carrying out suction filtration on the solution to obtain a solid product intermediate II; 3) and adding the solid product intermediate II into a second solvent, adding hexamethylene diisocyanate under stirring, heating to 40-50 ℃, reacting for 3-5 hours, and performing suction filtration and drying to obtain the polyamino bactericidal surfactant. The polyamino bactericidal surfactant solves the problem that in the process of oil field exploitation, injected water is used for breeding bacteria to corrode exploitation equipment, and further the petroleum yield and the oil gas quality are reduced.
Description
Technical Field
The invention relates to an oilfield auxiliary bactericide, in particular to a polyamino bactericidal surfactant, and a preparation method and application thereof.
Background
Recovery rates have declined year by year with the continuing exploitation and utilization of oil fields, and chemical flooding is often used to increase recovery rates. However, in the process, because the injected water contains a large amount of organic compounds, a large amount of bacteria such as iron bacteria, sulfate reducing bacteria, saprophytic bacteria and the like are propagated, equipment for oil field exploitation is continuously and seriously corroded, further, pipelines are blocked, an oil layer is damaged, finally, the water injection amount, the oil yield and the oil gas quality are reduced, and serious capital loss is caused. In order to reduce the loss, the addition of a surfactant with bactericidal performance during water injection has been studied to reduce the corrosion of the pipelines of the mining equipment. At present, the research on the sterilization performance of quaternary ammonium salt surfactants has made great progress, but the development of novel efficient sterilization surfactants becomes a research hotspot of people along with the improvement of bacterial resistance, the continuous increase of dosage and the increase of input cost year by year.
Disclosure of Invention
The method aims to solve the problem that in the process of oil field exploitation, injected water is corroded by bacteria breeding to exploitation equipment, so that the petroleum yield and the oil gas quality are reduced. The invention aims to provide a polyamino bactericidal surfactant, and a preparation method and application thereof. The polyamino bactericidal surfactant is formed by N in a molecule+The cationic group is an active group, and is adsorbed and aggregated on the surface of negatively charged thallus, so that the permeability of the cell wall of the bacteria is changed, and cytoplasm flows out, and on the other hand, hydrophobic alkyl enters a lipoid layer of cells due to extremely strong hydrophobic effect, so that enzyme protein in the cells is denatured and loses activity, and the sterilization effect is achieved.
The technical scheme adopted by the invention is as follows:
the structural formula of the polyamino bactericidal surfactant is as follows:
a preparation method of a polyamino bactericidal surfactant comprises the following steps:
1) mixing dipentaerythritol and caproyl chloride, stirring and reacting for 2-4 hours at the temperature of 30-50 ℃, and cooling to room temperature; neutralizing, washing, extracting and distilling under reduced pressure to obtain a viscous liquid intermediate I;
2) adding the viscous liquid intermediate I into a first solvent, adding powdery sodium hydroxide after the viscous liquid intermediate I is completely dissolved, stirring and reacting for 0.5-1 h at the temperature of 25-35 ℃, then adding 3-chloro-2-hydroxypropyl trimethyl ammonium chloride into the solution, heating to 70-90 ℃, reacting for 5-7 h, and carrying out suction filtration on the solution to obtain a solid product intermediate II;
3) and adding the solid product intermediate II into a second solvent, adding hexamethylene diisocyanate under stirring, heating to 40-50 ℃, reacting for 3-5 hours, and performing suction filtration and drying to obtain the polyamino bactericidal surfactant.
As a further improvement of the invention, in the step 1), the molar ratio of the dipentaerythritol to the caproyl chloride is 1 (2.9-3.1).
As a further improvement of the invention, in the step 2), the adding amount molar ratio of the viscous liquid intermediate I to the 3-chloro-2-hydroxypropyl trimethyl ammonium chloride is 5-1.
As a further improvement of the present invention, in step 2), the first solvent is dimethyl sulfoxide.
As a further improvement of the invention, in step 3), the solid product intermediate ii is added in an amount of 2: 1 mol.
As a further improvement of the present invention, in step 3), the second solvent is dimethylformamide.
An application of polyamino bactericidal surfactant as bactericide.
The adding mass fraction of the polyamino bactericidal surfactant is 3%, and the using temperature is 35-45%.
The adding amount of the polyamino bactericidal surfactant is 3 percent (mass fraction), and the bacterial liquid contains iron bacteria, sulfate reducing bacteria and saprophytic bacteria, and the content of the bacteria is 50 mg/L, 76 mg/L and 48 mg/L respectively.
Compared with the prior art, the invention has the following advantages:
the preparation reaction condition of the surfactant for multi-amino sterilization is mild, the synthetic process is simple, and the raw materials are cheap and easy to obtain. The polyamino surfactant for sterilization contains a plurality of N+On the other hand, hydrophobic alkyl enters a lipoid layer of cells due to extremely strong hydrophobic effect, so that the enzyme protein in the cells is denatured and inactivated. The polyamino surfactant for sterilization has the advantages of high efficiency, low toxicity, no accumulation, no influence of pH change and easy dispersion.
Description of the drawings:
FIG. 1 is a synthetic route of the polyamino germicidal surfactant obtained in example 4;
FIG. 2 nuclear magnetic hydrogen spectrum of a polyamino germicidal surfactant obtained in example 4;
FIG. 3 variation of the sterilization rate with contact time obtained in example 4.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention relates to a polyamino bactericidal surfactant, which has the following structural formula:
the principle is as follows: the polyamino bactericidal surfactant has excellent bactericidal performance because positively charged ionic groups in the molecular structure of the polyamino bactericidal surfactant are adsorbed on the surface of bacteria with negative charges, so that the permeability of cell walls of the bacteria is changed, cytoplasm flows out, and a bactericidal effect is achieved.
Specifically, the preparation method of the polyamino bactericidal surfactant comprises the following steps:
(1) adding dipentaerythritol and hexanoyl chloride into a three-neck flask, wherein the molar ratio of the dipentaerythritol to the hexanoyl chloride is 1 (2.9-3.1). After the addition, stirring and reacting for 2-4 h at 30-50 ℃, and cooling to room temperature. And (3) neutralizing with a sodium hydroxide solution, wherein the concentration of the sodium hydroxide solution is 5% (mass fraction). Washing with water, extracting with organic solvent, and distilling under reduced pressure to remove solvent to obtain viscous liquid intermediate I.
(2) Adding the viscous liquid intermediate I obtained in the step (1) into a four-neck flask, wherein the addition amount of the viscous liquid intermediate I is 0.025mol, adding dimethyl sulfoxide (DMSO), which is a first solvent, into the four-neck flask, wherein the addition amount is 120m L, adding powdery sodium hydroxide after the viscous liquid intermediate I is completely dissolved, stirring and reacting for 0.5-1 h at 25-35 ℃, wherein the addition amount of the powdery sodium hydroxide is 4g, then adding 3-chloro-2-hydroxypropyl trimethyl ammonium chloride into a solution containing solvents such as dimethyl sulfoxide, heating to 70-90 ℃ when the addition amount of the 3-chloro-2-hydroxypropyl trimethyl ammonium chloride is 0.05mol, reacting for 5-7 h, and performing suction filtration on the solution to obtain a solid product intermediate II.
(3) And (3) adding the solid product intermediate II in the step (2) into a second solvent, wherein the addition amount of the solid product intermediate II is 0.02mol, and the second solvent is Dimethylformamide (DMF) and is 29.24 g. Hexamethylene Diisocyanate (HDI) was added with magnetic stirring in an amount of 0.01 mol. And heating to 40-50 ℃, reacting for 3-5 h, and performing suction filtration and drying to obtain the polyamino bactericidal surfactant.
4) Adding the polyamino bactericidal surfactant in the step 3) into a bacterial liquid containing iron bacteria, sulfate reducing bacteria and saprophytic bacteria, wherein the adding amount of the polyamino bactericidal surfactant is 3% (mass fraction), the bacterial content is respectively 50 mg/L, 76 mg/L and 48 mg/L, stirring for 0-25h by using a magnetic stirrer, the stirring temperature is 40 ℃, determining the bactericidal rate, and evaluating the bactericidal effect.
The invention is further illustrated by the following specific examples and figures:
example 1
Adding dipentaerythritol and hexanoyl chloride into a three-neck flask according to a molar ratio of 1:2.9, stirring and reacting for 3 hours at 40 ℃, cooling to room temperature, neutralizing with 5% (mass fraction) of a sodium hydroxide solution, washing with water, extracting with an organic solvent, distilling under reduced pressure to remove the solvent to obtain a viscous liquid intermediate I, adding 0.025mol of the viscous liquid intermediate I into the four-neck flask, adding 120m L dimethyl sulfoxide (DMSO) into the four-neck flask, adding 4g of powdered sodium hydroxide into the four-neck flask after the viscous liquid intermediate I is completely dissolved, stirring and reacting for 0.5 hours at 30 ℃, adding 0.05mol of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride into a solution containing dimethyl sulfoxide and other solvents, heating to 80 ℃, reacting for 6 hours, performing suction filtration to obtain a solid product intermediate II, adding 0.02mol of the solid product intermediate II into 29.24g of Dimethylformamide (DMF), adding 0.01mol of Hexamethylene Diisocyanate (HDI) into the solution under magnetic stirring, heating to 45 ℃, performing suction filtration, drying, obtaining a surface active bacterial surface activity, stirring, and adding the magnetic bacterial strain into a bacterial strain solution with a bactericidal activity ratio of 3925-95 mg, and a bactericidal activity ratio of 4650 mg/3 mg, respectively, wherein the bactericidal activity is obtained by adding a bacterial strain for a bactericidal activity test, and the bacterial strain with a bactericidal activity test of 4625-contained in a bactericidal activity test of 3975 mg/3 mg.
Example 2
Adding dipentaerythritol and hexanoyl chloride into a three-neck flask according to a molar ratio of 1:2.95, stirring and reacting for 3 hours at 40 ℃, cooling to room temperature, neutralizing with 5% (mass fraction) of a sodium hydroxide solution, washing with water, extracting with an organic solvent, distilling under reduced pressure to remove the solvent to obtain a viscous liquid intermediate I, adding 0.025mol of the viscous liquid intermediate I into the four-neck flask, adding 120m L dimethyl sulfoxide (DMSO) into the four-neck flask, adding 4g of powdered sodium hydroxide into the four-neck flask after the viscous liquid intermediate I is completely dissolved, stirring and reacting for 0.5 hours at 30 ℃, adding 0.05mol of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride into a solution containing solvents such as dimethyl sulfoxide and the like, heating to 80 ℃, reacting for 6 hours, performing suction filtration to obtain a solid product intermediate II, adding 0.02mol of the solid product intermediate II into 29.24g of Dimethylformamide (DMF), adding 0.01mol of Hexamethylene Diisocyanate (HDI) into the solution under magnetic stirring, heating to 45 ℃, reacting for 4 hours, drying, obtaining a magnetic force, adding a magnetic force, stirring, obtaining a bacterial surface activity, stirring, and measuring the bacterial activity, wherein the bacterial surface activity is measured by adding 6725 mg/3625 mg of a bacterial cell growth rate, and the bacterial cell growth rate is measured, wherein the bacterial cell growth rate is measured by adding/3625 mg of a bacterial cell growth rate, and the bacterial cell growth rate of a bacterial cell growth rate of 80 mg.
Example 3
Adding dipentaerythritol and hexanoyl chloride into a three-neck flask according to a molar ratio of 1:3, stirring and reacting for 3h at 40 ℃, cooling to room temperature, neutralizing with 5% (mass fraction) of a sodium hydroxide solution, washing with water, extracting with an organic solvent, distilling under reduced pressure to remove the solvent to obtain a viscous liquid intermediate I, adding 0.025mol of the viscous liquid intermediate I into the four-neck flask, adding 120m of L dimethyl sulfoxide (DMSO) into the four-neck flask, adding 4g of powdered sodium hydroxide into the four-neck flask after the viscous liquid intermediate I is completely dissolved, stirring and reacting for 0.5h at 30 ℃, adding 0.05mol of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride into a solution containing solvents such as dimethyl sulfoxide and the like, heating to 80 ℃, reacting for 6h, performing suction filtration to obtain a solid product intermediate II, adding 0.02mol of the solid product intermediate II into 29.24g of Dimethylformamide (DMF), adding 0.01mol of Hexamethylene Diisocyanate (HDI) into the magnetic stirring, heating to 45 ℃, reacting for 4h to obtain a solid product intermediate II, drying, adding a magnetic surface active agent, stirring and stirring to obtain a bactericidal activity, wherein the bacterial surface activity is calculated as bacterial growth rate, the bacterial growth rate, and the bacterial growth rate is calculated as 3925-4625 mg/bacterial growth rate, and the bacterial growth rate is calculated as bacterial growth rate, and the bacterial growth rate, wherein the bacterial growth rate is calculated as 0.48 mg/bacterial growth rate, and the.
Example 4
Adding dipentaerythritol and hexanoyl chloride into a three-neck flask according to a molar ratio of 1:3.05, stirring and reacting for 3 hours at 40 ℃, cooling to room temperature, neutralizing with 5% (mass fraction) of a sodium hydroxide solution, washing with water, extracting with an organic solvent, distilling under reduced pressure to remove the solvent to obtain a viscous liquid intermediate I, adding 0.025mol of the viscous liquid intermediate I into the four-neck flask, adding 120m L dimethyl sulfoxide (DMSO) into the four-neck flask, adding 4g of powdered sodium hydroxide into the four-neck flask after the viscous liquid intermediate I is completely dissolved, stirring and reacting for 0.5 hours at 30 ℃, adding 0.05mol of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride into a solution containing solvents such as dimethyl sulfoxide and the like, heating to 80 ℃, reacting for 6 hours, performing suction filtration to obtain a solid product intermediate II, adding 0.02mol of the solid product intermediate II into 29.24g of Dimethylformamide (DMF), adding 0.01mol of Hexamethylene Diisocyanate (HDI) into the solution under magnetic stirring, heating to 45 ℃, reacting for 4 hours, drying, obtaining a magnetic surface active bacterial surface additive, stirring, and adding 6754 mg of a bactericidal activity of a bactericidal amino-containing bacterial strain, wherein the bactericidal activity is measured, the bacterial concentration is measured, and the bacterial concentration is found in 3625 mg/3625 mg.
Example 5
Adding dipentaerythritol and hexanoyl chloride into a three-neck flask according to a molar ratio of 1:3.1, stirring and reacting for 3h at 40 ℃, cooling to room temperature, neutralizing with 5% (mass fraction) sodium hydroxide solution, washing with water, extracting with an organic solvent, distilling under reduced pressure to remove the solvent to obtain a viscous liquid intermediate I, adding 0.025mol of the viscous liquid intermediate I into the four-neck flask, adding 120m L dimethyl sulfoxide (DMSO) into the four-neck flask, adding 4g of powdered sodium hydroxide into the four-neck flask after the viscous liquid intermediate I is completely dissolved, stirring and reacting for 0.5h at 30 ℃, adding 0.05mol of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride into a solution containing dimethyl sulfoxide and other solvents, heating to 80 ℃, reacting for 6h, performing suction filtration on the solution to obtain a solid product intermediate II, adding 0.02mol of the solid product intermediate II into 29.24g of Dimethylformamide (DMF), adding 0.01mol of Hexamethylene Diisocyanate (HDI) into the solution under magnetic stirring, heating to 45 ℃, performing suction filtration, drying, obtaining a surface active bacterial surface activity, stirring, and adding the magnetic bacterial surface activity of the bacterial strain for 3 mg, stirring, and measuring the bacterial activity, wherein the bacterial activity is 3925 mg/70 mg, the bacterial surface activity, the bacterial activity is calculated as 4625 mg/4650 mg of the bacterial strain, and the bactericidal activity of the bacterial strain, and the bacterial strain for 3-95 mg of the bacterial strain for 3 mg of the bacterial strain for.
In order to characterize the structural characteristics of the polyamino germicidal surfactant, the polyamino germicidal surfactant synthesized in example 4 was subjected to nuclear magnetic hydrogen spectroscopy, and the results are shown in fig. 2.
FIG. 2 nuclear magnetic hydrogen spectrum of a polyamino germicidal surfactant obtained in example 4.
1H NMR(300MHz，DMSO)：6.76(s，2H)，5.80(s，8H)，5.37(s，4H)，4.42(m，4H)，3.94(s，16H)，3.79(s，8H)，3.63～3.25(m，56H)，2.32(t，12H)，1.66(m，12H)，1.50～1.28(m，32H)，0.88(t，18H)ppm。
FIG. 3 variation of the sterilization rate with contact time obtained in example 4. After the three bacteria are contacted with the polyamino germicidal surfactant for 15 hours, the germicidal rate is basically maintained stable, the germicidal rate is over 99 percent, and the germicidal effect is obvious.
Example 6
(1) Adding dipentaerythritol and hexanoyl chloride into a three-neck flask, wherein the molar ratio of the dipentaerythritol to the hexanoyl chloride is 1: 2.9. After the addition, the mixture was stirred at 30 ℃ for 2 hours and cooled to room temperature. And (3) neutralizing with a sodium hydroxide solution, wherein the concentration of the sodium hydroxide solution is 5% (mass fraction). Washing with water, extracting with organic solvent, and distilling under reduced pressure to remove solvent to obtain viscous liquid intermediate I.
(2) Adding the viscous liquid intermediate I obtained in the step (1) into a four-neck flask, wherein the addition amount of the viscous liquid intermediate I is 0.025mol, adding dimethyl sulfoxide (DMSO), which is a first solvent, into the four-neck flask, wherein the addition amount is 120m L, adding powdery sodium hydroxide after the viscous liquid intermediate I is completely dissolved, stirring and reacting for 0.5h at 25 ℃, wherein the addition amount of the powdery sodium hydroxide is 4g, then adding 3-chloro-2-hydroxypropyl trimethyl ammonium chloride into a solution containing solvents such as dimethyl sulfoxide, wherein the addition amount of the 3-chloro-2-hydroxypropyl trimethyl ammonium chloride is 0.05mol, heating to 70 ℃, reacting for 5h, and carrying out suction filtration on the solution to obtain a solid product intermediate II.
(3) And (3) adding the solid product intermediate II in the step (2) into a second solvent, wherein the addition amount of the solid product intermediate II is 0.02mol, and the second solvent is Dimethylformamide (DMF) and is 29.24 g. Hexamethylene Diisocyanate (HDI) was added with magnetic stirring in an amount of 0.01 mol. Heating to 40 ℃, reacting for 3h, filtering, and drying to obtain the polyamino bactericidal surfactant.
4) Adding the polyamino bactericidal surfactant in the step 3) into a bacterial liquid containing iron bacteria, sulfate reducing bacteria and saprophytic bacteria, wherein the adding amount of the polyamino bactericidal surfactant is 3% (mass fraction), the bacterial content is respectively 50 mg/L, 76 mg/L and 48 mg/L, stirring for 0-25h by using a magnetic stirrer, the stirring temperature is 40 ℃, determining the bactericidal rate, and evaluating the bactericidal effect.
Example 7
(1) Adding dipentaerythritol and hexanoyl chloride into a three-neck flask, wherein the molar ratio of the dipentaerythritol to the hexanoyl chloride is 1:3. After the addition, stirring and reacting for 3 hours at the temperature of 30-50 ℃, and cooling to room temperature. And (3) neutralizing with a sodium hydroxide solution, wherein the concentration of the sodium hydroxide solution is 5% (mass fraction). Washing with water, extracting with organic solvent, and distilling under reduced pressure to remove solvent to obtain viscous liquid intermediate I.
(2) Adding the viscous liquid intermediate I obtained in the step (1) into a four-neck flask, wherein the addition amount of the viscous liquid intermediate I is 0.025mol, adding dimethyl sulfoxide (DMSO), which is a first solvent, into the four-neck flask, wherein the addition amount is 120m L, adding powdery sodium hydroxide after the viscous liquid intermediate I is completely dissolved, stirring and reacting for 0.7h at 25-35 ℃, wherein the addition amount of the powdery sodium hydroxide is 4g, then adding 3-chloro-2-hydroxypropyl trimethyl ammonium chloride into a solution containing solvents such as dimethyl sulfoxide, wherein the addition amount of the 3-chloro-2-hydroxypropyl trimethyl ammonium chloride is 0.05mol, heating to 85 ℃, reacting for 6h, and performing suction filtration on the solution to obtain a solid product intermediate II.
(3) And (3) adding the solid product intermediate II in the step (2) into a second solvent, wherein the addition amount of the solid product intermediate II is 0.02mol, and the second solvent is Dimethylformamide (DMF) and is 29.24 g. Hexamethylene Diisocyanate (HDI) was added with magnetic stirring in an amount of 0.01 mol. Heating to 48 ℃, reacting for 4h, filtering, and drying to obtain the polyamino bactericidal surfactant.
4) Adding the polyamino bactericidal surfactant in the step 3) into a bacterial liquid containing iron bacteria, sulfate reducing bacteria and saprophytic bacteria, wherein the adding amount of the polyamino bactericidal surfactant is 3% (mass fraction), the bacterial content is respectively 50 mg/L, 76 mg/L and 48 mg/L, stirring for 15 hours by using a magnetic stirrer, the stirring temperature is 40 ℃, determining the bactericidal rate, and evaluating the bactericidal effect.
Example 8
(1) Adding dipentaerythritol and hexanoyl chloride into a three-neck flask, wherein the molar ratio of the dipentaerythritol to the hexanoyl chloride is 1: 3.1. After the addition, the reaction was stirred at 50 ℃ for 4 hours and cooled to room temperature. And (3) neutralizing with a sodium hydroxide solution, wherein the concentration of the sodium hydroxide solution is 5% (mass fraction). Washing with water, extracting with organic solvent, and distilling under reduced pressure to remove solvent to obtain viscous liquid intermediate I.
(2) Adding the viscous liquid intermediate I obtained in the step (1) into a four-neck flask, wherein the addition amount of the viscous liquid intermediate I is 0.025mol, adding dimethyl sulfoxide (DMSO), which is a first solvent, into the four-neck flask, wherein the addition amount is 120m L, adding powdery sodium hydroxide after the viscous liquid intermediate I is completely dissolved, stirring and reacting for 1h at 35 ℃, wherein the addition amount of the powdery sodium hydroxide is 4g, then adding 3-chloro-2-hydroxypropyl trimethyl ammonium chloride into a solution containing solvents such as dimethyl sulfoxide, wherein the addition amount of the 3-chloro-2-hydroxypropyl trimethyl ammonium chloride is 0.05mol, heating to 90 ℃, reacting for 7h, and carrying out suction filtration on the solution to obtain a solid product intermediate II.
(3) And (3) adding the solid product intermediate II in the step (2) into a second solvent, wherein the addition amount of the solid product intermediate II is 0.02mol, and the second solvent is Dimethylformamide (DMF) and is 29.24 g. Hexamethylene Diisocyanate (HDI) was added with magnetic stirring in an amount of 0.01 mol. Heating to 50 ℃, reacting for 5h, filtering, and drying to obtain the polyamino bactericidal surfactant.
4) Adding the polyamino bactericidal surfactant in the step 3) into a bacterial liquid containing iron bacteria, sulfate reducing bacteria and saprophytic bacteria, wherein the adding amount of the polyamino bactericidal surfactant is 3% (mass fraction), the bacterial content is respectively 50 mg/L, 76 mg/L and 48 mg/L, stirring for 25 hours by using a magnetic stirrer, the stirring temperature is 40 ℃, determining the bactericidal rate, and evaluating the bactericidal effect.
The foregoing is a more detailed description of the invention and it is not intended that the invention be limited to the specific embodiments described herein, but that various modifications, alterations, and substitutions may be made by those skilled in the art without departing from the spirit of the invention, which should be construed to fall within the scope of the invention as defined by the appended claims.
Claims (9)
1. The polyamino germicidal surfactant is characterized in that the structural formula of the polyamino germicidal surfactant is as follows:
2. the preparation method of the polyamino bactericidal surfactant is characterized by comprising the following steps:
1) mixing dipentaerythritol and caproyl chloride, stirring and reacting for 2-4 hours at the temperature of 30-50 ℃, and cooling to room temperature; neutralizing, washing, extracting and distilling under reduced pressure to obtain a viscous liquid intermediate I;
2) adding the viscous liquid intermediate I into a first solvent, adding powdery sodium hydroxide after the viscous liquid intermediate I is completely dissolved, stirring and reacting for 0.5-1 h at the temperature of 25-35 ℃, then adding 3-chloro-2-hydroxypropyl trimethyl ammonium chloride into the solution, heating to 70-90 ℃, reacting for 5-7 h, and carrying out suction filtration on the solution to obtain a solid product intermediate II;
3) and adding the solid product intermediate II into a second solvent, adding hexamethylene diisocyanate under stirring, heating to 40-50 ℃, reacting for 3-5 hours, and performing suction filtration and drying to obtain the polyamino bactericidal surfactant.
3. The preparation method according to claim 2, wherein in the step 1), the molar ratio of the dipentaerythritol to the hexanoyl chloride is 1 (2.9-3.1).
4. The preparation method according to claim 2, wherein in the step 2), the addition molar ratio of the viscous liquid intermediate I to the 3-chloro-2-hydroxypropyl trimethyl ammonium chloride is 5-1.
5. The method according to claim 2, wherein in step 2), the first solvent is dimethyl sulfoxide.
6. The preparation method according to claim 2, wherein in the step 3), the solid product intermediate II is added in an amount of 2: 1 mol.
7. The method according to claim 2, wherein the second solvent is dimethylformamide in the step 3).
8. Use of a polyamino germicidal surfactant according to claim 1 as a germicidal agent.
9. The use according to claim 8, wherein the polyamino germicidal surfactant is added in an amount of 3% by weight and the use temperature is 35-45%.
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