Insulating electrified cleaning agent and preparation method thereof

Abstract

The invention discloses an insulating electrified cleaning agent and a preparation method thereof. The insulating electrified cleaning agent comprises the following components: 20-40% (v / v) of low-carbon alcohol, 5-15% (w / v) of a compound nonionic surfactant, 0.1-0.5% (w / v) of nano silicon dioxide dispersion liquid, 1-3% (w / v) of an antistatic regulator and 0.05-0.2% (w / v) of an antioxidant stabilizer. The invention belongs to the technical field of cleaning agents, and solves the problems of insufficient antistatic performance and limited cleaning capacity under complex dirt conditions of the existing cleaning agent by improving the formula.

Description

Technical Field

[0001] The invention belongs to the technical field of cleaning agents, and in particular relates to an insulating live cleaning agent and a preparation method thereof. Background Art

[0002] Live insulation equipment is often contaminated by industrial dirt, natural salt, alkali, fly ash, bird droppings, and other pollutants. These contaminants have high electrical resistance in dry conditions. However, in high humidity environments, contaminants on the insulation surface become wetted, causing a sharp increase in surface conductivity and leakage current. This significantly reduces the insulation's flashover voltage and may even cause flashover at operating voltage, impacting the safe operation of the power system. Compared to traditional methods such as dry cleaning, air blowing, and water flushing, live chemical cleaning of power grid equipment with chemical cleaning agents can effectively address this problem.

[0003] A Chinese patent disclosure, with publication number CN110628524B, is a composite cleaning agent for live insulating equipment, with a publication date of March 23, 2021. The patent provides a composite cleaning agent composed of a hydrocarbon cleaning agent, a compound surfactant, and a stabilizer. It has the characteristics of no harm to ozone, low fire hazard, easy volatility, and no residual liquid. It is suitable for insulating electrical equipment of various voltage levels. However, this technical solution does not fully consider the antistatic properties and high-voltage resistance of the cleaning agent, and there may be a risk of incomplete cleaning or local degradation of insulation performance. In addition, the lack of the introduction of nano-scale reinforcing materials in the cleaning agent formula means that its cleaning ability and long-term stability still have room for improvement.

[0004] In addition, a Chinese patent discloses a high-insulation cleaning agent for live cleaning of communication equipment with publication number CN107338140B, which was published on August 2, 2019. This patent significantly improves the voltage resistance and wettability of the cleaning agent by using fluorinated organic solvents and fluorinated surfactants, and can effectively clean dirt on the surface of communication equipment. However, the use of fluorinated substances in this technical solution may cause potential pollution to the environment, and the cost is high, which is not conducive to large-scale promotion and application. At the same time, the cleaning ability of this cleaning agent is limited under complex dirt conditions, especially for the removal of stubborn stains or oily attachments. The effect is not ideal, and multiple cleanings may be required to achieve the desired effect.

[0005] Therefore, a kind of insulation live cleaning agent and preparation method thereof are needed. Summary of the Invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an insulating live cleaning agent and a preparation method thereof and a method of using the device, which effectively solves the problem of insufficient cleaning power of insulating live cleaning agents on the market.

[0007] The technical solution adopted by the present invention is as follows: The present invention proposes an insulating live cleaning agent and a preparation method thereof, wherein the insulating live cleaning agent comprises the following components: 20-40% (v / v) of a low-carbon alcohol, 5-15% (w / v) of a compounded nonionic surfactant, 0.1-0.5% (w / v) of a nano-silicon dioxide dispersion, 1-3% (w / v) of an antistatic regulator and 0.05-0.2% (w / v) of an antioxidant stabilizer.

[0008] Preferably, the insulating live cleaning agent comprises the following components: 30% (v / v) of low-carbon alcohol, 10% (w / v) of compound nonionic surfactant, 0.3% (w / v) of nano-silicon dioxide dispersion, 2% (w / v) of antistatic regulator and 0.1% (w / v) of antioxidant stabilizer.

[0009] The preparation method of the nano-silicon dioxide dispersion comprises the following steps:

[0010] Step 1: Place SiO2 powder in a vacuum plasma reaction chamber, introduce an argon / oxygen mixed gas, maintain the pressure at 10 Pa, apply 200W radio frequency power, and treat for 8 minutes to obtain activated particles;

[0011] Step 2: The pretreated particles were transferred to a pulsed plasma reactor, heated to 80°C, and APTES vapor was introduced in a pulsed mode for 30 cycles to obtain a 2.8 nm thick siloxane layer.

[0012] Step 3: Directed grafting of fluorocarbon chains: Maintain the reactor temperature at 120°C, switch to FAS-17 vapor, adjust the plasma power to 150W, and process in continuous mode for 15 minutes with a vacuum level of 5 Torr to form a 1.5 nm thick vertically oriented fluorocarbon layer.

[0013] Step 4: introduce polyethylene glycol monomethyl ether silane treatment, switch to APTES treatment for 1 minute, repeat the cycle 8 times, and achieve molecular intercalation by controlling the pulse period;

[0014] Step 5: Cool down in steps under nitrogen protection, keep constant at 80°C for 30 minutes, and use supercritical CO2 to clean and remove ungrafted substances.

[0015] In the present invention, preferably, the low-carbon alcohol is selected from ethanol or isopropanol.

[0016] Low-carbon alcohols: Low-carbon alcohols are low-molecular-weight organic solvents with excellent volatility and solubility. In cleaning agents, low-carbon alcohols can quickly penetrate into dirt, weakening the bond between the dirt and the equipment surface, thereby facilitating its removal. Furthermore, their volatility allows them to evaporate quickly after cleaning, preventing residual residue from causing secondary contamination to the equipment.

[0017] In the present invention, preferably, the compound nonionic surfactant is a fatty alcohol polyoxyethylene ether and a fluorocarbon-polyether block compound added in a mass ratio of 3-5:1-2.

[0018] Compounded nonionic surfactants: Compounded nonionic surfactants are composed of multiple nonionic surfactants, which synergistically optimize the wettability and emulsification properties of the cleaning agent. This system effectively reduces the surface tension of the cleaning agent and improves its adaptability to complex stains, showing significant advantages in treating oily deposits and stubborn stains. Compounded nonionic surfactants also have excellent high-pressure resistance and can maintain stable interfacial activity.

[0019] In the present invention, the antistatic regulator is selected from one or more groups of cationic antistatic agents, zwitterionic antistatic agents, and nonionic antistatic agents.

[0020] Preferably, the antistatic regulator is selected from one or more combinations of stearamidoethyl-(β-hydroxyethyl)dimethylammonium nitrate, lauryl betaine, metal powder, and carbon black.

[0021] Antistatic Conditioner: An antistatic conditioner is a functional additive that reduces static electricity accumulation by lowering the resistivity of cleaning agents. In high-voltage environments, static electricity accumulation can lead to partial discharge, impacting the safe operation of equipment. The addition of an antistatic conditioner effectively suppresses static electricity generation, ensuring a safe cleaning process while preventing dirt from re-adsorbing onto equipment surfaces due to static electricity.

[0022] In the present invention, the antioxidant stabilizer is selected from one or a combination of phenolic antioxidants, amine antioxidants, and thioether antioxidants.

[0023] Preferably, the antioxidant stabilizer is generally selected from one or more of: 2,6-di-tert-butyl-p-cresol (BHT), tert-butylhydroquinone (TBHQ), dilauryl thiodipropionate, thiodipropionic acid, and the like.

[0024] Antioxidant stabilizers: Antioxidant stabilizers are chemical additives used to slow the aging process of cleaning agents. Over time, cleaning agents can become oxidized, leading to performance degradation. Antioxidant stabilizers extend the life of cleaning agents by trapping free radicals and inhibiting the propagation of oxidation reactions, ensuring stable performance after repeated use.

[0025] In addition, the present invention also discloses a preparation method of the insulating live cleaning agent, which comprises the following steps: adding low-carbon alcohol, compounded nonionic surfactant, nano-silica dispersion, antistatic regulator and antioxidant stabilizer to deionized water in sequence, stirring evenly and then standing for 12 hours to obtain the insulating live cleaning agent.

[0026] In addition, the present invention also discloses a method for using an insulating live cleaning agent, which includes the following steps: after the electrical equipment is powered off and cooled to room temperature, the insulating live cleaning agent is evenly sprayed on the surface of the equipment using a spray device, and then wiped clean with a dust-free cloth after standing for 5-10 minutes; for stubborn stains that are difficult to remove, the spraying can be repeated and lightly brushed with a soft brush until the dirt is completely removed.

[0027] Preferably, the working pressure of the spray device is 0.2-0.5 MPa, and the spraying distance is 20-30 cm.

[0028] The beneficial effects achieved by the present invention using the above structure are as follows:

[0029] (1) A three-layer gradient structure of fluorocarbon chain (low surface energy)-siloxane (medium surface energy)-hydroxyl (high surface energy) was constructed on the surface of nanoparticles by plasma grafting, which solved the problem of insufficient interfacial energy matching between nanoparticles and oily dirt;

[0030] (2) It solves the problem of insufficient anti-static performance of existing cleaning agents and limited cleaning ability under complex dirt conditions; it is conducive to large-scale promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is an appearance diagram of an insulation live cleaning agent and a preparation method thereof proposed by the present invention;

[0032] Figure 2 The electrostatic voltage of an insulating charged cleaning agent and a preparation method thereof proposed by the present invention;

[0033] Figure 3 The flashover voltage of an insulating live cleaning agent and a preparation method thereof proposed by the present invention;

[0034] Figure 4 The present invention provides an insulating charged cleaning agent and a preparation method thereof for measuring resistance change.

[0035] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0038] Example 1

[0039] Insulation live cleaning agent and preparation method thereof

[0040] The insulating charged cleaning agent comprises the following components: 30% (v / v) of low-carbon alcohol, 10% (w / v) of compound nonionic surfactant, 0.3% (w / v) of nano-silicon dioxide dispersion, 2% (w / v) of antistatic regulator and 0.1% (w / v) of antioxidant stabilizer.

[0041] The preparation method of the nano-silicon dioxide dispersion comprises the following steps:

[0042] Step 1: Place 50nm SiO2 powder (purity>99.9%) in a vacuum plasma reaction chamber, introduce argon / oxygen mixed gas (volume ratio 4:1), maintain the pressure at 10Pa, apply 200W RF power, and process for 8 minutes to obtain a surface hydroxyl density of 9.2 / nm 2 Activated particles (XPS verification)

[0043] Step 2: The pretreated particles were transferred to a pulsed plasma reactor, heated to 80°C, and APTES vapor (carrier gas: N2) was introduced in a pulsed mode (5s on / 3s off): during the onset phase: 300W power, APTES flow rate 0.8mL / min; during the off-set phase: vacuum was maintained at 0.1 Torr. After 30 cycles, a 2.8nm thick siloxane layer was obtained (measured by ellipsometer).

[0044] Step 3: Directed grafting of fluorocarbon chains

[0045] Maintaining the reactor temperature at 120°C, switch to FAS-17 vapor (heated to 150°C for vaporization), adjust the plasma power to 150W, and process in continuous mode for 15 minutes. The vacuum is controlled at 5 Torr, forming a 1.5 nm thick vertically oriented fluorocarbon layer (confirmed by AFM phase imaging).

[0046] Step 4: Add polyethylene glycol monomethyl ether silane (0.5 mL / min) for 3 minutes (100 W), switch to APTES (0.2 mL / min) for 1 minute (50 W), repeat the cycle 8 times, and achieve molecular intercalation by controlling the pulse period (10 s on / 5 s off).

[0047] Step 5: Under nitrogen protection, the temperature was lowered in steps: 120°C → 80°C (at a rate of 5°C / min), and the temperature was kept constant at 80°C for 30 minutes. Ungrafted substances were removed by cleaning with supercritical CO2 (35MPa, 40°C). Finally, the following was formed on the particle surface: a fluorocarbon layer with a coverage of 82%, a transition layer with a filling degree of 37%, and a surface energy gradient of 12 → 35 → 72mN / m.

[0048] The low-carbon alcohol is selected from isopropanol.

[0049] The compound nonionic surfactant is a fatty alcohol polyoxyethylene ether and a fluorocarbon-polyether block compound added in a mass ratio of 4:2.

[0050] Preferably, the antistatic regulator is selected from lauryl betaine.

[0051] Preferably, the antioxidant stabilizer is generally selected from: 2,6-di-tert-butyl-p-cresol (BHT).

[0052] In addition, the present invention also discloses a preparation method of the insulating live cleaning agent, which comprises the following steps: adding low-carbon alcohol, compounded nonionic surfactant, nano-silica dispersion, antistatic regulator and antioxidant stabilizer to deionized water in sequence, stirring evenly and then standing for 12 hours to obtain the insulating live cleaning agent.

[0053] In addition, the present invention also discloses a method for using an insulating live cleaning agent, which includes the following steps: after the electrical equipment is powered off and cooled to room temperature, the insulating live cleaning agent is evenly sprayed on the surface of the equipment using a spray device, and then wiped clean with a dust-free cloth after standing for 5-10 minutes; for stubborn stains that are difficult to remove, the spraying can be repeated and lightly brushed with a soft brush until the dirt is completely removed.

[0054] Preferably, the working pressure of the spray device is 0.2-0.5 MPa, and the spraying distance is 20-30 cm.

[0055] Example 2

[0056] Insulation live cleaning agent and preparation method thereof

[0057] The insulating live cleaning agent comprises the following components: 20% (v / v) of low-carbon alcohol, 5% (w / v) of compound nonionic surfactant, 0.1% (w / v) of nano-silicon dioxide dispersion, 1% (w / v) of antistatic regulator and 0.05% (w / v) of antioxidant stabilizer.

[0058] The preparation method is the same as that of Example 1.

[0059] Example 3

[0060] Insulation live cleaning agent and preparation method thereof

[0061] The insulating charged cleaning agent comprises the following components: 40% (v / v) of low-carbon alcohol, 15% (w / v) of compound nonionic surfactant, 0.5% (w / v) of nano-silicon dioxide dispersion, 3% (w / v) of antistatic regulator and 0.2% (w / v) of antioxidant stabilizer.

[0062] The preparation method is the same as that of Example 1.

[0063] Comparative Example 1

[0064] The difference of this comparative example is that the nano-silica dispersion is not contained (it is replaced by a solvent), and the other components and component ratios are the same as those in Example 1.

[0065] Test Example 1

[0066] Basic properties of an insulating live cleaning agent

[0067] The cleaning agents prepared in Example 1 and Comparative Example 1 were used as test samples and divided into Example 1 group and Comparative Example 1 group, with three replicates in each group. The cleaning agents in each group were allowed to stand for 30 days, and their appearance changes were observed to evaluate their stability. The volume resistivity of the cleaning agents was measured using an insulation resistance tester in accordance with GB / T1410-2006. Equal amounts of engine oil (simulating oily dirt) and mixed dust (simulating complex dirt) were applied to the surface of the insulating board, and the dirt was sprayed with each cleaning agent. The dirt was allowed to stand for 5 minutes and then wiped, and the decontamination efficiency was calculated.

[0068] Table 1 Basic properties of cleaning agents

[0069] Group stability Insulation resistance Oil decontamination efficiency Mixed dust removal efficiency Example 1 No stratification, no precipitation <![CDATA[1.2×10 12 Ohm cm]]> 96.5％ 93.2％ Comparative Example 1 Oil and water separation, slightly turbid <![CDATA[8×10 12 Ohm cm]]> 42.3％ 38.6％

[0070] Result analysis: Figure 1As shown in Table 1, after standing for 30 days, there was no stratification or precipitation in Example 1, while oil-water stratification and slight turbidity occurred in Comparative Example 1. The insulation resistance of Example 1 was higher than that of Comparative Example 1, and the Example 1 group exceeded the standard requirement. In terms of engine oil decontamination and mixed dust decontamination efficiency, Example 1 group was higher than Comparative Example 1 group.

[0071] Test Example 2

[0072] Core performance of an insulation live cleaning agent

[0073] The cleaning agents prepared in Example 1 and Comparative Example 1 were used as test samples and divided into Example 1 group and Comparative Example 1 group, with three replicates in each group. According to the ISO 18061:2019 standard, the electrostatic voltage on the surface of the insulating plate after cleaning was measured using an electrostatic tester to test the antistatic performance of the cleaning agent. According to the GB / T 16927.1-2011 standard, a copper electrode was immersed in the cleaning agent, the voltage was gradually increased to flashover, and the flashover voltage was recorded to test the high voltage resistance of the cleaning agent.

[0074] Result analysis: Figure 2 and Figure 3 As shown, the electrostatic voltage of the cleaning agent of Example 1 is lower than that of Comparative Example 1, while the flashover voltage is much higher than that of Comparative Example 1.

[0075] Test Example 3

[0076] Practical application test of an insulation live cleaning agent

[0077] The cleaning agents prepared in Example 1 and Comparative Example 1 were used as test samples and divided into Example 1 group and Comparative Example 1 group, with three replicates in each group. The substation insulators to be cleaned were de-energized and naturally cooled to room temperature. The initial insulation resistance of the insulators was measured with a megohmmeter. The substation insulators were cleaned with the cleaning agents prepared in Example 1 and Comparative Example 1. After cleaning, the insulators were dried in a natural environment for 2 hours to ensure that no liquid remained on the surface. The insulation resistance of the insulators after cleaning was measured again with a megohmmeter.

[0078] Result analysis: Figure 4 As shown, after the cleaning agent of Example 1 cleans the substation insulator, its resistance is increased much higher than that of Comparative Example 1.

[0079] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0080] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

[0081] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. An insulating live cleaning agent, characterized in that: The insulating live cleaning agent comprises the following components: 20-40% (v / v) of low-carbon alcohol, 5-15% (w / v) of compound nonionic surfactant, 0.1-0.5% (w / v) of nano-silicon dioxide dispersion, 1-3% (w / v) of antistatic regulator and 0.05-0.2% (w / v) of antioxidant stabilizer.

2. The insulating cleaning agent according to claim 1, characterized in that: The insulating charged cleaning agent comprises the following components: 30% (v / v) of low-carbon alcohol, 10% (w / v) of compound nonionic surfactant, 0.3% (w / v) of nano-silicon dioxide dispersion, 2% (w / v) of antistatic regulator and 0.1% (w / v) of antioxidant stabilizer.

3. The insulating live cleaning agent according to claim 2, characterized in that: The low-carbon alcohol is selected from ethanol or isopropanol.

4. The insulating live cleaning agent according to claim 3, characterized in that: The preparation method of the nano-silicon dioxide dispersion comprises the following steps: Step 1: Place SiO2 powder in a vacuum plasma reaction chamber, introduce an argon / oxygen mixed gas, maintain the pressure at 10 Pa, apply 200W radio frequency power, and treat for 8 minutes to obtain activated particles; Step 2: The pretreated particles were transferred to a pulsed plasma reactor, heated to 80°C, and APTES vapor was introduced in a pulsed mode for 30 cycles to obtain a 2.8 nm thick siloxane layer. Step 3: Directed grafting of fluorocarbon chains: Maintain the reactor temperature at 120°C, switch to FAS-17 vapor, adjust the plasma power to 150W, and process in continuous mode for 15 minutes with a vacuum level of 5 Torr to form a 1.5 nm thick vertically oriented fluorocarbon layer. Step 4: introduce polyethylene glycol monomethyl ether silane treatment, switch to APTES treatment for 1 minute, repeat the cycle 8 times, and achieve molecular intercalation by controlling the pulse period; Step 5: Cool down in steps under nitrogen protection, keep constant at 80°C for 30 minutes, and use supercritical CO2 to clean and remove ungrafted substances.

5. The insulating live cleaning agent according to claim 4, characterized in that: The compound nonionic surfactant is a fatty alcohol polyoxyethylene ether and a fluorocarbon-polyether block compound added in a mass ratio of 3-5:1-2.

6. The insulating live cleaning agent according to claim 5, characterized in that: The antistatic regulator is selected from one or more groups of cationic antistatic agents, zwitterionic antistatic agents, and nonionic antistatic agents.

7. The insulating live cleaning agent according to claim 6, characterized in that: The antioxidant stabilizer is selected from one or more combinations of phenolic antioxidants, amine antioxidants, and thioether antioxidants.

8. The method for preparing the insulating electrostatic cleaning agent according to any one of claims 1 to 7, characterized in that: The preparation method comprises the following steps: adding low-carbon alcohol, compound nonionic surfactant, nano-silicon dioxide dispersion, antistatic regulator and antioxidant stabilizer into a solvent in sequence, stirring evenly and then standing for 12 hours to obtain the insulating charged cleaning agent.

9. A method for using an insulating live cleaning agent, characterized in that: The cleaning method of the insulating live cleaning agent comprises the following steps: after the electrical equipment is powered off and cooled to room temperature, the insulating live cleaning agent according to any one of claims 1 to 8 is evenly sprayed on the surface of the equipment using a spray device, and then wiped clean with a dust-free cloth after standing for 5 to 10 minutes; for stubborn stains that are difficult to remove, the spraying can be repeated and lightly brushed with a soft brush until the dirt is completely removed.

10. The method for using the insulating live cleaning agent according to claim 9, characterized in that: The working pressure of the spray device is 0.2-0.5 MPa, and the spraying distance is 20-30 cm.

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