Composite electrostatic eliminator and preparation method thereof
By constructing a composite static eliminator consisting of an interpenetrating polymer network and ion-electron dual conductive channels, the problems of charge dissipation capacity decay and insufficient durability in low humidity environments in existing technologies have been solved, achieving efficient charge dissipation and self-repair capability after mechanical damage in low humidity environments.
Patent Information
- Application Number
- CN202511955384.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-23
- Publication Date
- 2026-03-06
AI Technical Summary
Existing static eliminators exhibit reduced charge dissipation capacity and insufficient durability in low-humidity environments, leading to safety hazards and quality issues in fields such as electronics manufacturing, petrochemicals, textile printing and dyeing, and precision instrument packaging.
Using a water/isopropanol mixed solution containing high concentrations of cationic and nonionic surfactants as the base carrier, a nonionic self-healing polymer matrix and surface-functionalized nano-conductive fillers are introduced to construct an interpenetrating polymer network and ion-electron dual conductive channels. A thermally reversible antistatic coating is formed by using nonionic hydrophilic modified furan polyurethane and bismaleimide crosslinking agent. An electron tunneling network is constructed by combining modified carbon nanotubes and hydrophobic ionic liquids.
It maintains efficient charge dissipation in low humidity environments and triggers a self-healing mechanism through thermal excitation in the event of mechanical damage, extending the functional durability of the coating and ensuring the effective protection of the static eliminator under different humidity conditions.
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Abstract
Description
Technical Field
[0001] This application relates to the field of chemical additives technology, specifically to a composite static eliminator and its preparation method. Background Technology
[0002] Static electricity buildup is a natural physical process that occurs on the surface of insulating materials due to friction or induction. In modern industrial fields such as electronics manufacturing, petrochemicals, textile printing and dyeing, and precision instrument packaging, it has caused numerous safety hazards and quality problems. When the static charge on the material surface cannot be dissipated in a timely and effective manner, high-voltage discharge may cause sensitive electronic components to break down and fail, attract dust from the air and affect the optical performance of products, and even induce fires and explosions in environments containing flammable solvents or dust. Therefore, coating the dielectric surface with a functionalized coating to create a charge discharge channel and reduce the surface resistivity of the material is currently the most direct and economical means of implementing electrostatic protection.
[0003] However, existing commercially available static eliminators or antistatic coating technologies still face significant technical bottlenecks in practical applications. Traditional water-based or alcohol-soluble antistatic agents primarily rely on cationic surfactants such as quaternary ammonium salts as conductive components. Their mechanism involves adsorbing water molecules from the air to form an ionically conductive water film. This results in their performance exhibiting a strong humidity dependence, often failing in low-humidity, dry environments due to the rupture of the water film. Furthermore, the durability of some static eliminators decreases significantly under high temperatures or friction, limiting their application.
[0004] Therefore, it is of great significance to develop an antistatic agent that does not diminish its charge dissipation capability and has long-lasting functionality in low humidity environments. Summary of the Invention
[0005] This application provides a composite static eliminator and its preparation method, which has the effects of maintaining charge dissipation ability and long-lasting function in low humidity environments.
[0006] Firstly, the composite static eliminator provided in this application adopts the following technical solution: A composite static eliminator comprises the following components in weight percentage: isopropanol 30-38%, cetrimonium chloride 4.5-5.5%, fatty alcohol polyoxyethylene ether 6-7.5%, polyvinyl alcohol 2-3%, polyethylene glycol 2.5-3.5%, triethanolamine 0.6-0.9%, isothiazolinone 0.15-0.25%, propylene glycol 1.8-2.2%, disodium ethylenediaminetetraacetate 0.02-0.04%, fragrance 0.4-0.6%, modified carbon nanotubes 1.2-1.8%, hydrophobic ionic liquid 1.8-2.2%, nonionic waterborne furan polyurethane 5-6%, bismaleimide 0.8-1.2%, with the balance being deionized water.
[0007] By adopting the above technical solution, using a water / isopropanol mixed solution containing high concentrations of cationic and nonionic surfactants as the base carrier, and by introducing a nonionic self-healing polymer matrix and surface-functionalized nano-conductive fillers, an antistatic coating system enhanced by interpenetrating polymer networks and ion-electron dual conductive channels was constructed.
[0008] To effectively mitigate the risk of electrostatic flocculation between traditional aqueous cationic resins and alkaline base solutions, this solution introduces a nonionic hydrophilic modified furan polyurethane. This polymer achieves aqueous phase dispersion stability by introducing flexible polyethylene glycol side chains onto the main chain, rather than relying on pH-sensitive ionization centers. This unique nonionic property allows it to coexist with cetrimonium chloride (a cationic surfactant) and the weakly alkaline triethanolamine environment in the base formulation, maintaining the thermodynamic stability of the colloidal system. During film formation, the furan hanging groups on the nonionic hydrophilic modified furan polyurethane undergo a Diels-Alder reaction with the added bismaleimide crosslinking agent, constructing a rigid crosslinked framework with thermally reversible response characteristics. Simultaneously, the polyvinyl alcohol and polyethylene glycol components in the base formulation, as high-molecular-weight hydrophilic segments, physically interpenetrate within this rigid framework, forming a semi-interpenetrating structure. This binary network design utilizes the crosslinked framework to provide the necessary coating hardness and scrub resistance while retaining the hygroscopic and water-retaining capabilities of the hydrophilic segments in the microscopic region, providing free space for ion migration.
[0009] Meanwhile, to improve the dispersibility of hydrophobic multi-walled carbon nanotubes in the water-alcohol system, a non-covalent modification technique was used to retain the sp... 2 Under the premise of a conductive lattice, the surface is endowed with negative charge. Furthermore, using cetrimonium chloride in the basic formulation as a cationic anchoring agent, the strong electrostatic interaction between the quaternary ammonium salt cation and the anionic groups on the carbon nanotube surface is utilized to achieve the directional adsorption and dense encapsulation of surfactant molecules on the carbon nanotube surface. This "cationic-nonionic composite micelle" structure not only overcomes van der Waals force-induced aggregation but also effectively reduces the interfacial barrier between the inorganic filler and the organic matrix. Based on this, 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt, an ionic liquid with low vapor pressure and hydrophobic properties, is introduced. Using fatty alcohol polyoxyethylene ether in the basic formulation as a highly efficient emulsifier, it is uniformly dispersed in the polymer matrix to construct an auxiliary ion transport channel.
[0010] Under normal humidity conditions, the hygroscopic components in the basic formula and the dissociated cetrimonium chloride dominate ion conduction, ensuring efficient static electricity elimination. However, under low humidity conditions, the aforementioned hygroscopic channels are blocked. At this time, the electron percolation network constructed by carbon nanotubes and the encapsulated ionic liquid take over the task of charge dissipation, achieving protective efficacy in different humidity environments.
[0011] Secondly, when the coating surface suffers physical damage and cracks, the reverse Diels-Alder reaction is triggered by external thermal excitation, causing the crosslinked network to dissociate and the system viscosity to decrease. At this time, the low molecular weight polyethylene glycol and polyvinyl alcohol components interspersed in the basic formulation exhibit plasticizer-like behavior at high temperatures, which improves the diffusion rate and fluidity of polymer chain segments, accelerates the physical healing of crack interfaces and the reconnection of conductive fillers, and enhances functional durability.
[0012] Optionally, the method for preparing the modified carbon nanotubes includes the following steps: S1. Weigh 10-15 parts by weight of multi-walled carbon nanotubes and 2-4 parts by weight of sodium 1-pyrene sulfonate, and add them to 500-800 parts by weight of a 1:1 volume ratio of ethanol / water mixed solvent. S2. Under ice-water bath conditions, treat the S1 mixture with an ultrasonic disperser with a power of 600-1000W for 45-60 minutes. S3. Centrifuge the S2 dispersion at 8000-10000 rpm for 10-15 min, discard the supernatant, and vacuum dry at 50-60℃ for 8-12 h to obtain modified carbon nanotubes.
[0013] By adopting the above technical solution, sodium 1-pyrene sulfonate is selected as a modifier. Its pyrene ring structure can be non-covalently adsorbed onto the surface of carbon nanotubes through strong π-π stacking. At the same time, its sulfonic acid group can introduce stable negative charge on the surface of carbon nanotubes after ionization, which creates conditions for subsequent use of the electrostatic anchoring effect of the cationic surfactant (cetrimonium chloride) in the formulation.
[0014] Secondly, prolonged high-power ultrasonic treatment in an ice-water bath environment can fully individualize the molecules and effectively bind them to the modifier molecules, while the low temperature environment can prevent the heat generated by the ultrasound from causing agglomeration, thus ensuring the uniformity and efficiency of the modification reaction.
[0015] Finally, unreacted free modifiers and solvents were removed by high-speed centrifugation and vacuum drying to obtain pure modified carbon nanotube powder with uniform surface properties.
[0016] Optionally, the preparation method of the nonionic waterborne furan polyurethane includes the following steps: S1. Add 35-45 parts by weight of dehydrated polytetrahydrofuran diol, 12-18 parts by weight of nonionic diol chain extender with polyethylene glycol side chain structure, 18-22 parts by weight of isophorone diisocyanate and 0.03-0.08 parts by weight of dibutyltin dilaurate catalyst to the reactor. S2. Heat to 75-85℃ and react for 2.5-3.5h to obtain a nonionic isocyanate-terminated prepolymer; S3. Cool to 45-55℃, add 4-6 parts by weight of furfurylamine dissolved in a small amount of acetone, and continue the reaction at this temperature for 0.5-1.5h. S4. Deionized water was added to the S3 solution under high-speed stirring, and acetone solvent was removed by rotary evaporation under reduced pressure to obtain a nonionic waterborne furan polyurethane emulsion.
[0017] By adopting the above technical solution, a nonionic glycol chain extender with a polyethylene glycol side chain is used in the prepolymerization stage to react with isophorone diisocyanate and polytetrahydrofuran glycol, introducing stable polyethylene glycol hydrophilic side chains into the polymer backbone, ensuring that the resin has nonionic properties, making it compatible with the cationic surfactant cetrimonium chloride added later in the formulation and the weakly alkaline environment, avoiding the risk of flocculation or phase separation caused by charge interaction.
[0018] Subsequently, through the end-capping reaction of furfurylamine, active groups containing furan rings are grafted to the polymer chain ends, providing reaction sites for the subsequent thermally reversible Diels-Alder reaction with the bismaleimide crosslinking agent.
[0019] Finally, by high-speed shear dispersion in the aqueous phase and removal of acetone solvent, a uniform and stable aqueous emulsion is formed. This not only reduces the use and residue of organic solvents, but also enables the resin to be uniformly blended with other aqueous or alcohol-soluble components in the formulation using water as a medium.
[0020] Optionally, the hydrophobic ionic liquid is 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt.
[0021] By adopting the above technical solution, 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt, with its low vapor pressure and strong hydrophobicity, can be used to construct an auxiliary ion-conducting channel after emulsification. When the environment is dry and the efficiency of the basic ion transport mechanism decreases, this channel can work together with the electronic network of modified carbon nanotubes to maintain effective charge dissipation.
[0022] Optionally, the bismaleimide is N,N'-4,4'-diphenylmethane bismaleimide, which is pre-dissolved in N-methylpyrrolidone to form a solution with a concentration of 20-30% before use.
[0023] By adopting the above technical solution, the problem of dispersing bismaleimide in the main aqueous alcohol system is effectively solved; the highly soluble premixed solution ensures that it can be uniformly distributed in the system, avoiding local agglomeration, thereby ensuring the uniformity and completeness of the subsequent Diels-Alder crosslinking reaction with nonionic waterborne furan polyurethane.
[0024] Optionally, the fatty alcohol polyoxyethylene ether has an HLB value of 10-14.
[0025] By adopting the above technical solution, this hydrophilic-hydrophobic balance range enables it to efficiently emulsify hydrophobic ionic liquids, forming uniform and stable microdroplets and encapsulating them in a polymer matrix, thereby ensuring the reliable construction of auxiliary ion channels under low humidity conditions.
[0026] Optionally, the modified carbon nanotubes have a diameter of 10-20 nm and a length of 10-30 μm.
[0027] By adopting the above technical solution, the micrometer-diameter tube provides a high specific surface area, enhancing the interaction with the cationic anchoring agent and ensuring uniform dispersion and stability in the system. Simultaneously, the micrometer-scale length allows for sufficient overlap within the coating with a lower addition amount, more efficiently constructing electronic conduction pathways.
[0028] Secondly, this application provides a method for preparing a composite static eliminator, comprising the following steps: S1. Under stirring at room temperature, add deionized water, isopropanol, and propylene glycol in sequence, followed by cetrimonium chloride, fatty alcohol polyoxyethylene ether, polyvinyl alcohol, polyethylene glycol, triethanolamine, isothiazolinone, disodium EDTA and fragrance, and stir until completely dissolved to obtain the base solution. S2. Add modified carbon nanotubes to the base solution S1, turn on the high-shear emulsifier, set the speed to 3500-4500 rpm, and disperse for 30-50 min; then add hydrophobic ionic liquid, adjust the speed to 1500-2500 rpm, and disperse for 15-25 min; reduce the speed to 600-1000 rpm, add nonionic waterborne furan polyurethane emulsion, stir evenly, then add pre-dissolved bismaleimide solution dropwise, and continue stirring for 20-40 min to obtain a composite static eliminator.
[0029] By employing the above-mentioned technical solution, each component in the base solution is dissolved sequentially to construct a stable chemical environment, laying the foundation for subsequent functional additions. Subsequently, carbon nanotubes are modified with high-shear dispersion, allowing their surface anions to be fully electrostatically anchored to cetrimonium chloride cations in the solution, effectively preventing aggregation and creating conditions for constructing an electronically conductive network. Next, a hydrophobic ionic liquid is introduced with moderate shear to form uniformly dispersed microdroplets, establishing auxiliary ion channels. Finally, nonionic aqueous furan polyurethane and bismaleimide are added under low-shear conditions, ensuring emulsion stability while promoting a controllable Diels-Alder crosslinking reaction, forming a uniform, thermally reversible network.
[0030] In summary, this application includes at least one of the following beneficial technical effects: 1. By using cetrimonium chloride in conjunction with hydrophilic polymers polyvinyl alcohol and polyethylene glycol to form the main hygroscopic ion channels, efficient charge dissipation is ensured under normal humidity conditions. Simultaneously, surface-modified carbon nanotubes and hydrophobic ionic liquids are introduced. These are uniformly dispersed in the coating through the electrostatic anchoring of cetrimonium chloride and the emulsification effect of fatty alcohol polyoxyethylene ether, respectively, forming an electron tunneling network in low-humidity environments. This mechanism ensures improved electrostatic dissipation capability of the coating under low humidity conditions. 2. A dynamic cross-linked network formed by the Diels-Alder reaction of nonionic waterborne furan polyurethane and bismaleimide provides adhesion for the static eliminator coating; while the interspersed flexible chains of polyvinyl alcohol and polyethylene glycol enhance toughness and ion migration space. When the coating develops microcracks due to mechanical damage, external thermal stimulation can trigger a reverse Diels-Alder reaction, causing temporary dissociation of the local cross-linked network, increasing the system's fluidity. At the same time, the flexible hydrophilic segments act as internal plasticizers, driving the molecular chains to diffuse towards the crack interface and achieve physical healing, repairing the conductive pathways in the damaged area, thereby extending the product's functional durability. Detailed Implementation
[0031] Preparation Example 1 The modified carbon nanotubes are prepared by the following steps: S1. Weigh 13 parts by weight of multi-walled carbon nanotubes and 3 parts by weight of sodium 1-pyrene sulfonate, and add them to 600 parts by weight of a 1:1 volume ratio of ethanol / water mixed solvent. S2. Under ice-water bath conditions, treat the S1 mixture with an 800W ultrasonic disperser for 60 minutes. S3. Centrifuge the S2 dispersion at 9000 rpm for 15 min, discard the supernatant, and vacuum dry at 55℃ for 10 h to obtain modified carbon nanotubes.
[0032] Preparation Example 2 The modified carbon nanotubes differ from those in Preparation Example 1 in that sodium 1-pyrene sulfonate is not present in step S1.
[0033] Preparation Example 3 The preparation method of nonionic waterborne furan polyurethane includes the following steps: S1. Add 40 parts by weight of dehydrated polytetrahydrofuran diol, 15 parts by weight of nonionic diol chain extender with polyethylene glycol side chain structure, 20 parts by weight of isophorone diisocyanate and 0.05 parts by weight of dibutyltin dilaurate catalyst to the reactor. S2. Heat to 80℃ and react for 3 hours to obtain a nonionic isocyanate-terminated prepolymer. S3. Cool down to 50°C, add 5 parts by weight of furfurylamine dissolved in a small amount of acetone, and continue to keep the temperature for 1 hour. S4. Deionized water was added to the S3 solution under high-speed stirring, and acetone solvent was removed by rotary evaporation under reduced pressure to obtain a nonionic waterborne furan polyurethane emulsion.
[0034] Preparation Example 4 The nonionic aqueous furan polyurethane differs from Preparation Example 3 in that isophorone diisocyanate is replaced with dimethyl carbonate in step S1.
[0035] Preparation Example 5 The nonionic waterborne furan polyurethane differs from Preparation Example 3 in that the furfurylamine dissolved in a small amount of acetone in step S3 is replaced with an equal amount of acetone.
[0036] Example 1 A composite static eliminator comprises the following components in weight percentage: isopropanol 38%, cetrimonium chloride 5.5%, fatty alcohol polyoxyethylene ether 7.5%, polyvinyl alcohol 3%, polyethylene glycol 3.5%, triethanolamine 0.9%, isothiazolinone 0.25%, propylene glycol 2.2%, disodium ethylenediaminetetraacetate 0.04%, fragrance 0.6%, modified carbon nanotubes 1.2%, hydrophobic ionic liquid 1.8%, nonionic waterborne furan polyurethane 5%, bismaleimide 0.8%, and the balance being deionized water; Specifically, the modified carbon nanotubes were obtained using Preparation Example 1, with a diameter of 10-20 nm and a length of 10-30 μm; the nonionic waterborne furan polyurethane was obtained using Preparation Example 3; the hydrophobic ionic liquid was 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt; the bismaleimide was N,N'-4,4'-diphenylmethane bismaleimide, which was pre-dissolved in N-methylpyrrolidone to form a 25% solution before use; and the fatty alcohol polyoxyethylene ether had an HLB value of 10-14.
[0037] A method for preparing a composite static eliminator includes the following steps: S1. Under stirring at room temperature, add deionized water, isopropanol, and propylene glycol in sequence, followed by cetrimonium chloride, fatty alcohol polyoxyethylene ether, polyvinyl alcohol, polyethylene glycol, triethanolamine, isothiazolinone, disodium EDTA and fragrance, and stir until completely dissolved to obtain the base solution. S2. Add modified carbon nanotubes to the base solution S1, turn on the high-shear emulsifier, set the speed to 3500 rpm, and disperse for 50 min; then add hydrophobic ionic liquid, adjust the speed to 1500 rpm, and disperse for 25 min; reduce the speed to 1000 rpm, add nonionic waterborne furan polyurethane emulsion, stir evenly, then add pre-dissolved bismaleimide solution dropwise, and continue stirring for 40 min to obtain a composite static eliminator.
[0038] Example 2 A composite static eliminator, differing from Example 1, is composed of the following components by mass percentage: 35% isopropanol, 5% cetrimonium chloride, 6.5% fatty alcohol polyoxyethylene ether, 2.5% polyvinyl alcohol, 3% polyethylene glycol, 0.7% triethanolamine, 0.2% isothiazolinone, 2% propylene glycol, 0.03% disodium ethylenediaminetetraacetate, 0.5% fragrance, 1.5% modified carbon nanotubes, 2% hydrophobic ionic liquid, 5.5% nonionic waterborne furan polyurethane, 1% bismaleimide, with the balance being deionized water.
[0039] Example 3 A composite static eliminator, differing from Example 1, is composed of the following components by mass percentage: isopropanol 30%, cetrimonium chloride 4.5%, fatty alcohol polyoxyethylene ether 6%, polyvinyl alcohol 2%, polyethylene glycol 2.5%, triethanolamine 0.6%, isothiazolinone 0.15%, propylene glycol 1.8%, disodium ethylenediaminetetraacetate 0.02%, fragrance 0.4%, modified carbon nanotubes 1.8%, hydrophobic ionic liquid 2.2%, nonionic waterborne furan polyurethane 6%, bismaleimide 1.2%, and the balance being deionized water.
[0040] Comparative Example 1 A composite static eliminator differs from Example 1 in that the modified carbon nanotubes are replaced with an equal amount of deionized water.
[0041] Comparative Example 2 A composite static eliminator differs from Example 1 in that the modified carbon nanotubes are replaced with an equal amount of conventional multi-walled carbon nanotubes.
[0042] Comparative Example 3 A composite static eliminator differs from Example 1 in that the modified carbon nanotubes are specifically obtained using Preparation Example 2.
[0043] Comparative Example 4 A composite static eliminator differs from Example 1 in that the hydrophobic ionic liquid is replaced with an equal amount of deionized water.
[0044] Comparative Example 5 A composite static eliminator differs from Example 1 in that the nonionic waterborne furan polyurethane is replaced with an equal amount of conventional anionic waterborne polyurethane resin, and the bismaleimide is replaced with an equal amount of deionized water.
[0045] Comparative Example 6 A composite static eliminator differs from Example 1 in that the nonionic waterborne furan polyurethane is specifically obtained using Preparation Example 4.
[0046] Comparative Example 7 A composite static eliminator differs from Example 1 in that the nonionic waterborne furan polyurethane is specifically obtained using Preparation Example 5.
[0047] Comparative Example 8 A composite static eliminator differs from Example 1 in that bismaleimide is replaced with an equal amount of deionized water.
[0048] Detection example The surface resistivity of the static eliminator was tested according to ASTM D257; the static decay time of the static eliminator was tested according to ANSI / ESD STM11.11-2015; the finished product was sealed in a transparent glass bottle and stored in a constant temperature oven at 50±2℃ for 28 days to test the storage stability of the static eliminator; cross-scratches were made with a blade, and after heat treatment at 80℃ for 30 minutes, the surface resistivity of the scratched area before and after repair was measured. The resistivity of the scratched area after repair / the resistivity of the undamaged area was used to measure the self-healing efficiency of the static eliminator; the specific test results are shown in Table 1.
[0049] Table 1 As shown in Table 1 of Examples 1-3, the surface resistivity can still be maintained at 10 under low humidity (RH 25%) conditions. 7 -10 8 The effective range of Ω / sq and the electrostatic decay time of less than 2 seconds both verify the success of the ion-electron dual channel; both passed the accelerated aging test, proving that the combination of the non-ionic matrix and the dynamic cross-linked network provides stability; the functional recovery rate of scratches after heat treatment confirms the effective construction of the thermally reversible covalent network.
[0050] As shown in Table 1 of Examples 1 and Comparative Examples 1-3, the lack of modified carbon nanotubes leads to increased resistivity and failure of antistatic function under low humidity conditions. The use of unmodified carbon nanotubes results in rapid precipitation and system disruption, demonstrating that surface modification is a prerequisite for achieving stable and uniform dispersion of nanofillers in composite systems.
[0051] As shown in Table 1 of the performance test data for Examples 1 and Comparative Examples 4-7, the low-humidity performance decreased after the hydrophobic ionic liquid was removed, but it did not completely fail (because carbon nanotubes were still present). This indicates that the ionic liquid, as an auxiliary ion channel, works synergistically with the carbon nanotube network to jointly ensure antistatic performance. The use of ionic resin caused immediate flocculation of the system, proving that the nonionic waterborne furan polyurethane is the basis for the stable existence of the entire formulation, and its nonionic properties avoid electrostatic conflicts with cationic components.
[0052] As can be seen from the performance test data in Table 1 of Example 1 and Comparative Example 8, bismaleimide is the key to achieving thermo-induced repair.
[0053] Please note that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The above embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A composite static eliminator characterized by comprising: Isopropyl alcohol 30-38%, cetrimonium bromide 4.5-5.5%, fatty alcohol polyoxyethylene ether 6-7.5%, polyvinyl alcohol 2-3%, polyethylene glycol 2.5-3.5%, triethanolamine 0.6-0.9%, isothiazolinone 0.15-0.25%, propylene glycol 1.8-2.2%, disodium ethylenediaminetetraacetate 0.02-0.04%, essence 0.4-0.6%, modified carbon nanotube 1.2-1.8%, hydrophobic ionic liquid 1.8-2.2%, non-ionic aqueous furan polyurethane 5-6%, bismaleimide 0.8-1.2%, and the balance is deionized water.
2. The composite static eliminator according to claim 1, wherein The preparation method of the modified carbon nanotube comprises the following steps: S1, weigh 10-15 parts by weight of multi-walled carbon nanotubes and 2-4 parts by weight of 1-pyrene sulfonic acid sodium, and add them to 500-800 parts by weight of an ethanol / water mixed solvent with a volume ratio of 1:1; S2, under ice water bath conditions, use an ultrasonic disperser with a power of 600-1000 W to treat the mixture of S1 for 45-60 min; S3, centrifuge the dispersion of S2 at 8000-10000 rpm for 10-15 min, discard the supernatant, and vacuum dry at 50-60°C for 8-12 h to obtain the modified carbon nanotube.
3. The composite static eliminator according to claim 1, wherein The preparation method of the non-ionic aqueous furan polyurethane comprises the following steps: S1, add 35-45 parts by weight of polytetrahydrofuran diol after water removal, 12-18 parts by weight of non-ionic diol chain extender with polyethylene glycol structure in the side chain, 18-22 parts by weight of isophorone diisocyanate, and 0.03-0.08 parts by weight of dibutyl tin dilaurate catalyst in a reaction kettle; S2, heat to 75-85°C, and react for 2.5-3.5 h to obtain a non-ionic isocyanate group-containing prepolymer; S3, cool to 45-55°C, add 4-6 parts by weight of furanamine dissolved in a small amount of acetone dropwise, and continue to react for 0.5-1.5 h; S4, add deionized water to the solution of S3 under high-speed stirring, and remove the acetone solvent by rotary evaporation under reduced pressure to obtain a non-ionic aqueous furan polyurethane emulsion.
4. The composite static eliminator according to claim 1, wherein The hydrophobic ionic liquid is 1-ethyl-3-methylimidazolium bistrifluoromethylsulfonylimide salt.
5. The composite static eliminator according to claim 1, wherein The bismaleimide is N,N'-4,4'-diphenylmethane bismaleimide, which is pre-dissolved in N-methylpyrrolidone to form a solution with a concentration of 20-30% before use.
6. The composite static eliminator according to claim 1, wherein The HLB value of the fatty alcohol polyoxyethylene ether is 10-14.
7. The composite static eliminator according to claim 1, wherein The modified carbon nanotube has a diameter of 10-20 nm and a length of 10-30 μm.
8. The method of claim 1-7, wherein the method is characterized by, The preparation method comprises the following steps: S1, under stirring at room temperature, sequentially add deionized water, isopropyl alcohol, and propylene glycol, and then add cetrimonium bromide, fatty alcohol polyoxyethylene ether, polyvinyl alcohol, polyethylene glycol, triethanolamine, isothiazolinone, disodium ethylenediaminetetraacetate, and essence, and stir until completely dissolved to obtain a base solution; S2, adding modified carbon nanotubes to the S1 base solution, starting the high shear emulsifier, setting the rotation speed to 3500-4500 rpm, dispersing for 30-50 min; then adding the hydrophobic ionic liquid, adjusting the rotation speed to 1500-2500 rpm, dispersing for 15-25 min; reducing the rotation speed to 600-1000 rpm, adding the non-ionic water-based furan polyurethane emulsion, stirring uniformly, then adding the pre-dissolved bismaleimide solution dropwise, continuing to stir for 20-40 min, to obtain a composite static eliminator.