A cleaning fluid for removing residual impregnating agent from a cluster and a method for its preparation and use

Abstract

The application discloses a cleaning liquid for removing residual infiltrant in a cluster, a preparation method and application thereof, and belongs to the technical field of fiber infiltrant cleaning. According to weight parts, the cleaning liquid comprises 40-50 parts of an organic solvent, 20-30 parts of water, 3-5 parts of an alkaline additive, 5-8 parts of an A-type surfactant and 2-4 parts of a B-type surfactant, the structural formula of the A-type surfactant is shown as formula (1), and the structural formula of the B-type surfactant is shown as formula (2). The cleaning liquid can efficiently clean the residual infiltrant in a cluster device, meanwhile, corrosion of the cleaning liquid to the cluster device can be avoided, and the cleaning liquid can be applied to clean fiber infiltrant.

Description

Technical Field

[0001] This application relates to a cleaning solution for removing residual sizing agent from fiber bundles, its preparation method, and its application, belonging to the field of fiber sizing agent cleaning technology. Background Technology

[0002] After being impregnated, the fibers enter the bundling device for bundling. During the bundling process, substances such as the impregnating agent on the fibers adhere to the surface of the bundling device. As production progresses, the accumulated impurities affect the bundling effect. Existing bundling devices have complex structures and are inconvenient to clean, especially for some specially shaped bundling components, which are difficult to clean thoroughly.

[0003] Since current impregnating agents are mainly epoxy resins and polyurethanes, cleaning solutions for impregnating agents are mainly composed of mixed solvents such as esters / ethers / alcohols, plus surfactants and / or alkaline substances. For example, CN119592377A discloses a glass fiber impregnating agent pipe cleaning agent, which adds alkaline activators and surfactants to the main solvent and auxiliary solvent to clean the epoxy resin, polyurethane and other impregnating agents that have been cured on the impregnating agent pipes.

[0004] The applicant found that while this type of wetting agent can achieve a certain cleaning effect, because the bundled components are smaller than the wetting agent channels, it is difficult to completely remove all the residual wetting agent from the wall surface. Therefore, it is necessary to increase the cleaning time to improve the cleaning effect. However, increasing the cleaning time has the following disadvantages: 1. Increased production costs: Since the fiber bundling device needs to be cleaned while stopped, the increased cleaning time means an increased downtime for the bundling device, which reduces the production efficiency of the fiber bundling device and thus increases production costs. 2. Increased corrosion of the clustering device: The alkaline additives used in the cleaning solution will inevitably corrode the pipe walls of the clustering components, reducing the service life of the clustering device.

[0005] Therefore, there is currently a lack of a cleaning fluid that can efficiently and non-damage the cleaning of clustering devices. Summary of the Invention

[0006] To address the aforementioned issues, a cleaning solution is provided for removing residual wetting agent from the bundled assembly. This cleaning solution can efficiently clean the residual wetting agent in the bundled assembly while also preventing corrosion of the bundled assembly by the cleaning solution.

[0007] According to the first aspect of this application, this application provides a cleaning solution for removing residual wetting agent from a bundle, comprising, by weight: 40-50 parts of organic solvent, 20-30 parts of water, 3-5 parts of alkaline additive, 5-8 parts of type A surfactant and 2-4 parts of type B surfactant, wherein the structural formula of the type A surfactant is shown in formula (1):

[0008] Equation (1); The structural formula of the type B surfactant is shown in formula (2):

[0009] Equation (2).

[0010] The type A surfactant in the aforementioned cleaning solution has two main characteristics. First, it contains strongly positively charged quaternary ammonium salt groups at both ends, which can form ion pairs with anionic components in the wetting agent, such as fatty acid salts and sulfonates, thereby disrupting the adsorption force between the wetting agent and the clustering device. Second, the type A surfactant contains an imidazole ring, and the nitrogen atom on the imidazole ring can react with the Fe atoms on the metal surface. 2+ Cu 2+ Stable coordination compounds are formed, creating a dense adsorption film on the metal surface. This blocks the contact between water, oxygen, and the metal, inhibiting electrochemical corrosion caused by alkaline additives. Furthermore, the positive charge of the quaternary ammonium salt group enhances the adsorption stability of the imidazole ring on the metal surface, making the corrosion inhibitor film more robust.

[0011] Type B surfactants contain sulfonic acid groups, which have strong hydrophilicity and weather resistance. The sulfonic acid groups are negatively charged and can form ion pairs or electrostatic complexes with cations, thus regulating the stability and compatibility of the system. They also contain quaternary ammonium salt groups. Therefore, when Type B surfactants are compounded with Type A surfactants, the electrostatic attraction between anions and cations will promote the aggregation of molecules in the solution, further improving the stability and detergency of the cleaning solution.

[0012] Optionally, the weight ratio of the type A surfactant to the type B surfactant is 2:1.

[0013] Because Class A and Class B surfactants have high charge densities, it is necessary to control their ratio. If the ratio is unbalanced, excessive negative or positive charges will disrupt the charge balance, causing molecules to aggregate and form flocs, eventually leading to stratification or precipitation, loss of fluidity and uniformity, and inability to be used for cleaning.

[0014] Optionally, the organic solvent is selected from ether solvents and ester solvents in a weight ratio of (2-3):1.

[0015] Preferably, the ether solvent is selected from at least one of propylene glycol methyl ether, propylene glycol butyl ether, butanediol dimethyl ether, dipropylene glycol dimethyl ether, propylene glycol dimethyl ether, diglycerol monomethyl ether, and diglycerol monoethyl ether.

[0016] Preferably, the ester solvent is selected from at least one of propylene glycol diacetate, ethylene glycol diacetate, diethyl carbonate, ethyl acetate, and ethyl butyrate.

[0017] Optionally, the alkaline additive is selected from at least one of sodium hydroxide, potassium hydroxide, sodium peroxide, and magnesium oxide.

[0018] Optionally, the alkaline additive is selected from potassium hydroxide, sodium peroxide and magnesium oxide in a weight ratio of (3-5):(1-2):1.

[0019] Optionally, the preparation method of the type A surfactant is as follows: D1: 1, 4 Double (2) (Carboxyethyl)piperazine reacts with diethylenetriamine via amidation and cyclization to generate piperazine gemini-imidazoline; D2: Piperazine-diimizoline with 2,3 Glycidyl dimethyl dodecyl ammonium chloride was added to a solvent, followed by an aqueous sodium hydroxide solution. The mixture was then heated to the reaction temperature to carry out the reaction. Finally, the pH was adjusted to 5-6, and the mixture was washed and dried to obtain the Class A surfactant.

[0020] 1,4 Double (2) (Carboxyethyl)piperazine reacts with diethylenetriamine via amidation to form two amide bonds, followed by cyclization to generate an imidazoline ring, yielding piperazine gemini-imidazoline. The two secondary amino groups in this ring act as nucleophiles, attacking the 2,3-hydroxyl groups. The epoxy ring of glycidyl dimethyl dodecyl ammonium chloride undergoes ring-opening, followed by quaternization to introduce a positively charged quaternary ammonium group. Under neutral conditions, the proton of the NH bond remains intact, resulting in weak nucleophilicity. NaOH, as a strong basic reagent, provides OH- ions in its aqueous solution. - The ion has a strong proton-snapping ability and can abstract H atoms from the NH bonds of the imidazoline ring. + This promotes the efficient conduction of nucleophilic ring-opening reactions.

[0021] Specifically, the reaction formula for step D1 is as follows: ; Specifically, the reaction formula for step D2 is as follows: .

[0022] Optionally, in step D1, 1, 4 Double (2) The molar ratio of carboxyethyl piperazine to diethylenetriamine is 1:(2.5-2.8); the reaction temperature is 170-180℃, and the reaction time is 8-10h.

[0023] Optionally, the mass fraction of the sodium hydroxide aqueous solution in step D2 is 3%. 6%.

[0024] Optionally, in step D2, piperazine diimidazoline and 2,3 The molar ratio of glycidyl dimethyl dodecyl ammonium chloride is 1:(2.2-2.5), the reaction temperature is 50-60℃, and the reaction time is 10-15h.

[0025] Optionally, the preparation method of the type B surfactant is as follows: S1: N,N'-dimethyl-1,3-propanediamine and 2-chloro-N,N-dimethylethylamine are reacted to give intermediate 1; S2: Add intermediate 1 and propanesulfonate lactone to the solvent and react to obtain surfactant type B.

[0026] The intermediate obtained from the reaction of N,N'-dimethyl-1,3-propanediamine and 2-chloro-N,N-dimethylethylamine contains a tertiary amine group. When it reacts with propanesulfonate lactone, it attacks the carbon atom with the fewest substituents on the sulfonate lactone ring, causing the ring lactone to open. The nitrogen atom is protonated to form a quaternary ammonium cation, while a stable sulfonate anion is generated.

[0027] Specifically, the reaction formula for step S1 is as follows: .

[0028] Specifically, the reaction formula for step S2 is as follows: .

[0029] Optionally, in step S1, the molar ratio of N,N'-dimethyl-1,3-propanediamine and 2-chloro-N,N-dimethylethylamine is 1:(2.4-2.8), the reaction temperature is 70-80℃, and the reaction time is 2-3h.

[0030] Optionally, in step S2, the molar ratio of intermediate 1 to propanesulfonic acid lactone is 1:(2.5-3.0), the reaction temperature is 80-90℃, and the reaction time is 5-8h.

[0031] Optionally, the solvent mentioned in steps D2 and S2 is at least one of ethanol and acetonitrile.

[0032] According to a second aspect of this application, this application provides a method for preparing a cleaning solution for removing residual wetting agent from a bundle as described in any of the above claims, comprising the following steps: (1) Mix the organic solvent and water to obtain a mixed solution; (2) Add the type A surfactant and 1 / 2 of the alkaline additive to the 1 / 2 mixed solution and stir to obtain the first intermediate liquid; Add the type B surfactant and half of the alkaline additive to the remaining half of the mixed solution and stir to obtain the second intermediate solution; (3) Mix the first intermediate liquid and the second intermediate liquid to obtain the final product.

[0033] The reason for mixing type A and type B surfactants separately with an alkaline additive before final mixing is that if type A and type B surfactants are mixed directly, they will quickly form ion-pair complexes. These complexes have strong hydrophobic interactions and extremely poor water solubility, causing them to immediately aggregate and precipitate, resulting in turbidity and stratification of the cleaning solution, and complete loss of interfacial activity. The alkaline additive and the mixed solution act as a buffer medium, allowing type A and type B surfactants to dissolve and stabilize in an alkaline environment, forming individual surfactant micelles. When the two dilute solutions are then mixed, the anions and cations can form composite micelles through gentle interactions between the micelles, preserving the synergistic effect of the compound while preventing phase separation.

[0034] Optionally, in step (2), the temperature for preparing the first intermediate liquid is 50-60℃ and the stirring is carried out for at least 0.5h; the temperature for preparing the second intermediate liquid is 30-50℃ and the stirring is carried out for at least 0.5h.

[0035] Optionally, the rotation speed for preparing the first and second intermediate liquids in step (2) is 200-300 rpm.

[0036] Optionally, in step (3), the first intermediate liquid and the second intermediate liquid are cooled to room temperature before being mixed.

[0037] According to a third aspect of this application, this application provides the application of the cleaning solution for removing residual sizing agent from a bundle as described in any of the preceding claims, or the cleaning solution for removing residual sizing agent from a bundle prepared by the above-described method, in cleaning fiber sizing agents.

[0038] The beneficial effects of this application include, but are not limited to: 1. The cleaning solution according to this application for removing residual sizing agent from fiber bundles can efficiently clean the bundled device, reduce the downtime of the bundled device, improve the production efficiency of the fiber bundled device, and thus reduce production costs.

[0039] 2. The cleaning solution for removing residual wetting agent in the bundle according to this application contains a type A surfactant with a strong positive charge, a quaternary ammonium salt group and an imidazole ring, which can not only effectively clean the residual wetting agent in the bundle device, but also avoid the corrosion of the bundle device by the cleaning solution.

[0040] 3. The cleaning solution for removing residual wetting agent from the bundle according to this application contains a type B surfactant with sulfonic acid groups, which has strong hydrophilicity and weather resistance. When combined with a type A surfactant, it can further improve the stability and detergency of the cleaning solution.

[0041] 4. According to the method for preparing the cleaning solution for removing residual wetting agent in the cluster according to this application, by mixing the type A surfactant and the type B surfactant separately with the alkaline additive before mixing, the risk of the type A surfactant and the type B surfactant agglomerating and precipitating, which would lead to turbidity, stratification, and complete loss of interfacial activity in the cleaning solution is avoided. Detailed Implementation

[0042] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0043] Unless otherwise specified, the raw materials used in the embodiments and comparative examples of this application were all purchased commercially.

[0044] Unless otherwise specified, the methods used in the embodiments and comparative examples of this application are conventional methods in the prior art.

[0045] Example 1 This embodiment relates to a cleaning solution for removing residual wetting agent from bundles, comprising, by weight: 40 parts organic solvent, 20 parts water, 3 parts alkaline additive sodium hydroxide, 5 parts type A surfactant, and 2.5 parts type B surfactant, wherein the organic solvent is propylene glycol methyl ether and propylene glycol diacetate in a weight ratio of 2:1. Its preparation method includes the following steps: (1) Mix the organic solvent and water to obtain a mixed solution; (2) Add the type A surfactant and 1 / 2 of the alkaline additive to the 1 / 2 mixed solution, and stir at 50°C for 0.5 h to obtain the first intermediate liquid at a speed of 200 rpm; Add the type B surfactant and half of the alkaline additive to the remaining half of the mixed solution, and stir at 30°C for 0.5 h to obtain the second intermediate liquid at a speed of 200 rpm. (3) After cooling the first intermediate liquid and the second intermediate liquid to room temperature, they are mixed to obtain the cleaning solution.

[0046] The preparation method of Class A surfactants is as follows: D1: Mix 1,4 Double (2) Carboxyethyl)piperazine and diethylenetriamine were added to a flask, and xylene was added as a solvent. The mixture was stirred and slowly heated to 170°C and reacted for 10 h to obtain piperazine gemini imidazoline. The stirring speed was 150 r / min. D2: Piperazine gemini imidazoline in a molar ratio of 1:2.2 with 2,3 Glycidyl dimethyl dodecyl ammonium chloride was added to ethanol and mixed evenly. Then, a 3% sodium hydroxide aqueous solution was added, and the mixture was heated to 50°C and reacted for 15 hours. After the reaction was completed, the mixture was cooled, and dilute hydrochloric acid was added dropwise to adjust the pH to 5. The mixture was then washed with isopropanol and dried to obtain the Class A surfactant.

[0047] The preparation method of type B surfactants is as follows: S1: N,N'-dimethyl-1,3-propanediamine was dissolved in ethanol, and 2-chloro-N,N-dimethylethylamine, N,N'-dimethyl-1,3-propanediamine and 2-chloro-N,N-dimethylethylamine were added dropwise in a molar ratio of 1:2.4. Under N2 atmosphere protection, the mixture was stirred and heated to 70℃ for 3 h to obtain intermediate 1. The stirring speed was 150 r / min. S2: Intermediate 1 and propanesulfonic acid lactone in a molar ratio of 1:2.5 were added to ethanol. Under N2 atmosphere protection, the mixture was stirred and heated to 80℃ for 8 hours. After the reaction was completed, it was cooled to obtain surfactant B. The stirring speed was 150 r / min.

[0048] Example 2 This embodiment relates to a cleaning solution for removing residual wetting agent from a bundle, comprising, by weight: 50 parts organic solvent, 30 parts water, 5 parts alkaline additive, 8 parts type A surfactant, and 4 parts type B surfactant. The organic solvent is diglyceride monomethyl ether and diethyl carbonate in a weight ratio of 3:1, and the alkaline additive is potassium hydroxide, sodium peroxide, and magnesium oxide in a weight ratio of 3:1:1. Its preparation method includes the following steps: (1) Mix the organic solvent and water to obtain a mixed solution; (2) Add the type A surfactant and 1 / 2 of the alkaline additive to the 1 / 2 mixed solution, and stir at 60°C for 0.5 h to obtain the first intermediate liquid at a speed of 300 rpm; Add the type B surfactant and half of the alkaline additive to the remaining half of the mixed solution, and stir at 50°C for 0.5 h to obtain the second intermediate liquid at a speed of 300 rpm. (3) After cooling the first intermediate liquid and the second intermediate liquid to room temperature, they are mixed to obtain the cleaning solution.

[0049] The preparation method of Class A surfactants is as follows: D1: Mix 1,4 Double (2) Carboxyethyl)piperazine and diethylenetriamine were added to a flask, and xylene was added as a solvent. The mixture was stirred and slowly heated to 180°C for 8 hours to obtain piperazine gemini imidazoline. The stirring speed was 150 r / min. D2: Piperazine gemini imidazoline in a molar ratio of 1:2.5 with 2,3 Glycidyl dimethyl dodecyl ammonium chloride was added to acetonitrile and mixed evenly. A 6% sodium hydroxide aqueous solution was added, and the mixture was heated to 60°C and reacted for 10 hours. After the reaction was completed, the mixture was cooled, and dilute hydrochloric acid was added dropwise to adjust the pH to 6. The mixture was then washed with isopropanol and dried to obtain the Class A surfactant.

[0050] The preparation method of type B surfactants is as follows: S1: N,N'-dimethyl-1,3-propanediamine was dissolved in acetonitrile, and 2-chloro-N,N-dimethylethylamine, N,N'-dimethyl-1,3-propanediamine and 2-chloro-N,N-dimethylethylamine were added dropwise in a molar ratio of 1:2.8. Under N2 atmosphere protection, the mixture was stirred and heated to 80℃ for 2h to obtain intermediate 1. The stirring speed was 150r / min. S2: Intermediate 1 and propanesulfonic acid lactone in a molar ratio of 1:3.0 were added to acetonitrile. Under N2 atmosphere protection, the mixture was stirred and heated to 90℃ for 5 hours. After the reaction was completed, it was cooled to obtain surfactant B. The stirring speed was 150 r / min.

[0051] Example 3 This embodiment relates to a cleaning solution for removing residual wetting agent from a bundle, comprising, by weight: 45 parts organic solvent, 25 parts water, 5 parts alkaline additive, 6 parts type A surfactant, and 3 parts type B surfactant. The organic solvent is butanediol dimethyl ether and ethyl acetate in a weight ratio of 2.4:1, and the alkaline additive is potassium hydroxide, sodium peroxide, and magnesium oxide in a weight ratio of 5:2:1. Its preparation method includes the following steps: (1) Mix the organic solvent and water to obtain a mixed solution; (2) Add the type A surfactant and 1 / 2 of the alkaline additive to the 1 / 2 mixed solution, and stir at 60°C for 0.7h to obtain the first intermediate liquid at a speed of 300rpm; The type B surfactant and half of the alkaline additive were added to the remaining half of the mixed solution, and the mixture was stirred at 45°C for 0.7 h to obtain the second intermediate liquid at a speed of 300 rpm. (3) After cooling the first intermediate liquid and the second intermediate liquid to room temperature, they are mixed to obtain the cleaning solution.

[0052] The preparation method of Class A surfactants is as follows: D1: Mix 1,4-dimethylformamide in a molar ratio of 1:2.6 Double (2) Carboxyethyl)piperazine and diethylenetriamine were added to a flask, and xylene was added as a solvent. The mixture was stirred and slowly heated to 180°C for 9 hours to obtain piperazine gemini imidazoline. The stirring speed was 150 r / min. D2: Piperazine gemini imidazoline in a molar ratio of 1:2.3 with 2,3 Glycidyl dimethyl dodecyl ammonium chloride was added to ethanol and mixed evenly. Then, a 5% sodium hydroxide aqueous solution was added, and the mixture was heated to 60°C and reacted for 12 hours. After the reaction was completed, the mixture was cooled, and dilute hydrochloric acid was added dropwise to adjust the pH to 6. The mixture was then washed with isopropanol and dried to obtain the Class A surfactant.

[0053] The preparation method of type B surfactants is as follows: S1: N,N'-dimethyl-1,3-propanediamine was dissolved in ethanol, and 2-chloro-N,N-dimethylethylamine, N,N'-dimethyl-1,3-propanediamine and 2-chloro-N,N-dimethylethylamine were added dropwise in a molar ratio of 1:2.5. Under N2 atmosphere protection, the mixture was stirred and heated to 75℃ for 3 h to obtain intermediate 1. The stirring speed was 150 r / min. S2: Intermediate 1 and propanesulfonic acid lactone in a molar ratio of 1:2.7 were added to ethanol. Under N2 atmosphere protection, the mixture was stirred and heated to 85℃ for 6 hours. After the reaction was completed, it was cooled to obtain surfactant B. The stirring speed was 150 r / min.

[0054] Example 4 The difference between this embodiment and Embodiment 3 is that the amount of surfactant B is 2 parts, while the rest are the same.

[0055] Example 5 The difference between this embodiment and Embodiment 3 is that the amount of surfactant A is 5 parts, while the rest are the same.

[0056] Example 6 The difference between this embodiment and Example 3 is that the organic solvent is butanediol dimethyl ether and ethyl acetate in a weight ratio of 1.5:1, while the rest are the same.

[0057] Example 7 The difference between this embodiment and embodiment 3 is that a 7% sodium hydroxide aqueous solution is added in step D2, while the rest are the same.

[0058] Example 8 The difference between this embodiment and Embodiment 3 is that the alkaline additive does not contain magnesium oxide, but all other aspects are the same.

[0059] Example 9 The difference between this embodiment and Example 3 is that the alkaline additive is potassium hydroxide, sodium peroxide and magnesium oxide in a weight ratio of 5:3:2, while the rest are the same.

[0060] Comparative Example 1 The difference between this comparative example and Example 3 is that the number of parts of surfactant A is 9, while the rest are the same.

[0061] Comparative Example 2 The difference between this comparative example and Example 3 is that the amount of surfactant A is 4.5 parts, while the rest are the same.

[0062] Comparative Example 3 The difference between this comparative example and Example 3 is that the amount of surfactant B is 5 parts, while the rest are the same.

[0063] Comparative Example 4 The difference between this comparative example and Example 3 is that the amount of surfactant B is 1.5 parts, while the rest are the same.

[0064] Comparative Example 5 The difference between this comparative example and Example 3 is that cetyltrimethylammonium chloride is used instead of the type A surfactant, and steps D1 and D2 are omitted; all other steps are the same.

[0065] Comparative Example 6 The difference between this comparative example and Example 3 is that sodium dodecylbenzenesulfonate is used instead of the type B surfactant, and steps S1 and S2 are omitted; all other steps are the same.

[0066] Comparative Example 7 The difference between this comparative example and Example 3 is that: step (2) involves adding a type A surfactant and an alkaline additive to the mixed solution, stirring at 60°C for 0.7 h to obtain the first intermediate liquid, with a stirring speed of 300 rpm, then adding a type B surfactant, stirring at 45°C for 0.7 h to obtain the cleaning liquid, with a stirring speed of 300 rpm, and step (3) is omitted. All other steps are the same.

[0067] Test Example 1: Cleaning Effectiveness Test The cleaning solutions obtained from the above examples and comparative examples were used in a clustering device with residual wetting agent, and the cleaning effect and harmful substance residue were tested. The test results are shown in Table 1. The cleaning agent was circulated in the clustering device for 8 hours.

[0068] Table 1

[0069] As shown in Table 1, the total amount of chloride residue, dichloromethane, trichloromethane, trichloroethylene, and tetrachloroethylene in the cleaning solutions obtained in Examples 1-7 is 0, indicating excellent cleaning effect. In contrast, the cleaning solutions in Comparative Examples 1-4 have poor cleaning effect, and the cleaning effect in Comparative Examples 5-6 is significantly worse.

[0070] Test Example 2: Corrosion Inhibition Effect Test Q235 carbon steel sheets were used as test samples. The surface of the steel sheets was polished smooth, washed sequentially with distilled water and ethanol, dried, and weighed. They were then suspended in a cleaning agent and soaked at room temperature for 24 hours (as the experimental group). The Q235 carbon steel sheets were soaked in distilled water for 24 hours (as the blank group). The corrosion inhibition performance of the samples was determined using the static hanging plate weight loss method. The steel sheet samples were removed, washed sequentially with distilled water and ethanol, dried, weighed, and the corrosion rate was calculated. Corrosion inhibition rate V = (Δm) / (Δm) Δm1) / Δm, where Δm is the mass loss of the blank group sample before and after corrosion, and Δm1 is the mass loss of the experimental group sample before and after corrosion. The results are shown in Table 2.

[0071] Table 2

[0072] As shown in Table 2, the cleaning solutions obtained in Examples 1-7 have excellent corrosion inhibition effects, while the cleaning solutions in Comparative Examples 1-4 have poor corrosion inhibition effects, and Comparative Examples 5-6 have very poor corrosion inhibition effects. This indicates that the addition of Class A surfactants and Class B surfactants not only achieves excellent cleaning effects, but also reduces corrosion.

[0073] The above description is merely an embodiment of this application, and the scope of protection of this application is not limited to these specific embodiments, but is determined by the claims of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the technical concept and principles of this application should be included within the scope of protection of this application.

Claims

1. A cleaning solution for removing residual wetting agent from a bundle, characterized in that, By weight, it comprises: 40-50 parts organic solvent, 20-30 parts water, 3-5 parts alkaline additive, 5-8 parts of type A surfactant and 2-4 parts of type B surfactant, wherein the structural formula of type A surfactant is shown in formula (1): ； Equation (1); The structural formula of the type B surfactant is shown in formula (2): ； Equation (2).

2. The cleaning solution for removing residual wetting agent from a bundle according to claim 1, characterized in that, The weight ratio of the type A surfactant to the type B surfactant is 2:

1.

3. The cleaning solution for removing residual wetting agent from a bundle according to claim 1, characterized in that, The organic solvent is selected from ether solvents and ester solvents in a weight ratio of (2-3):1; Preferably, the ether solvent is selected from at least one of propylene glycol methyl ether, propylene glycol butyl ether, butanediol dimethyl ether, dipropylene glycol dimethyl ether, propylene glycol methyl ether, diglycerol monomethyl ether, and diglycerol monoethyl ether. The ester solvent is selected from at least one of propylene glycol diacetate, ethylene glycol diacetate, diethyl carbonate, ethyl acetate, and ethyl butyrate.

4. The cleaning solution for removing residual wetting agent from a bundle according to claim 1, characterized in that, The alkaline additive is selected from at least one of sodium hydroxide, potassium hydroxide, sodium peroxide, and magnesium oxide.

5. The cleaning solution for removing residual wetting agent from a bundle according to claim 4, characterized in that, The alkaline additive is selected from potassium hydroxide, sodium peroxide and magnesium oxide in a weight ratio of (3-5):(1-2):

1.

6. The cleaning solution for removing residual wetting agent from a bundle according to claim 1, characterized in that, The preparation method of the type A surfactant is as follows: D1: 1, 4 Double (2) (Carboxyethyl)piperazine reacts with diethylenetriamine via amidation and cyclization to generate piperazine gemini-imidazoline; D2: Piperazine-diimizoline with 2,3 Glycidyl dimethyl dodecyl ammonium chloride was added to a solvent, followed by an aqueous sodium hydroxide solution. The mixture was then heated to the reaction temperature to carry out the reaction. Finally, the pH was adjusted to 5-6, and the mixture was washed and dried to obtain the Class A surfactant.

7. The cleaning solution for removing residual wetting agent from a bundle according to claim 6, characterized in that, The mass fraction of the sodium hydroxide aqueous solution in step D2 is 3%. 6%.

8. The cleaning solution for removing residual wetting agent from a bundle according to claim 1, characterized in that, The preparation method of the type B surfactant is as follows: S1: N,N'-dimethyl-1,3-propanediamine and 2-chloro-N,N-dimethylethylamine are reacted to give intermediate 1; S2: Add intermediate 1 and propanesulfonate lactone to the solvent and react to obtain surfactant type B.

9. A method for preparing a cleaning solution for removing residual wetting agent from a bundle according to any one of claims 1-8, characterized in that, Includes the following steps: (1) Mix the organic solvent and water to obtain a mixed solution; (2) Add the type A surfactant and 1 / 2 of the alkaline additive to the 1 / 2 mixed solution and stir to obtain the first intermediate liquid; Add the type B surfactant and half of the alkaline additive to the remaining half of the mixed solution and stir to obtain the second intermediate solution; (3) Mix the first intermediate liquid and the second intermediate liquid to obtain the final product.

10. The cleaning solution for removing residual sizing agent from a bundle as described in any one of claims 1-8, or the cleaning solution for removing residual sizing agent from a bundle as described in claim 9, is used in cleaning fiber sizing agents.

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