A high-voltage electrostatic water processor electrode material and its preparation method

Abstract

This application provides a high-voltage electrostatic water processor electrode material and its preparation method, belonging to the technical field of water treatment equipment. The high-voltage electrostatic water processor electrode material includes: a flexible tubular substrate; a carbon-based conductive layer composited on the inner wall of the substrate; a metal support mesh embedded in the substrate; and inner and outer insulating layers covering the substrate, with their dielectric constant decreasing from the inside to the outside. This invention, by using a flexible tubular substrate as a support and composited with a carbon-based conductive layer, not only improves the conductivity of the electrode material but also enhances its mechanical strength. Simultaneously, the spiral metal support mesh embedded in the substrate further enhances the structural stability of the electrode material. The inner and outer insulating layers covering the substrate not only provide insulation but also, through the design of decreasing dielectric constant from the inside to the outside, optimize the distribution of the electrostatic field, improving the efficiency of water molecule polarization, thus giving the electrode material excellent corrosion resistance and stable conductivity.

Description

Technical Field

[0001] This application relates to the field of water treatment equipment technology, and in particular to a high-voltage electrostatic water processor electrode material and its preparation method. Background Technology

[0002] Cooling water systems often encounter problems during operation, such as scaling, corrosion, and microbial growth. Scaling, in particular, significantly impacts the heat transfer efficiency of heat exchange equipment and can even damage it, leading to substantial economic losses. Therefore, employing appropriate circulating cooling water treatment technology is crucial for ensuring the safe and economical operation of thermal power plants. High-voltage electrostatic water treatment technology, developed over the past few decades, is increasingly being used for scale prevention and removal in industrial circulating cooling water systems due to its advantages such as high effectiveness and no secondary pollution. This technology holds great promise and requires further research.

[0003] High-voltage electrostatic water treatment achieves scale and corrosion inhibition by altering the structure of water molecules. Due to the asymmetry between hydrogen and oxygen atoms in water molecules, they possess polarity. When water molecules are subjected to a high-voltage electrostatic field, polarization occurs, increasing their polarity and transforming them into water dipoles. These water molecules then align themselves in a chain-like formation, with their positive ends facing the cathode and their negative ends facing the anode, ensuring a neat arrangement of positive and negative dipoles. When dissolved salts are present in the water, their positive and negative ions are surrounded by these water dipoles, preventing them from moving freely in the water and contacting the vessel walls, thus preventing scale deposition. Furthermore, the polarization of water causes water molecules to gravitate towards the vessel walls, deforming and gradually removing old scale.

[0004] Existing high-voltage electrostatic water processor electrode materials suffer from the following problems: First, insufficient corrosion resistance; prolonged operation in high-voltage electrostatic fields and water environments easily leads to electrode material corrosion, affecting equipment lifespan and treatment efficiency. Second, high fouling deposition rate; fouling easily accumulates on the electrode material surface, causing electrode performance degradation and requiring frequent cleaning and maintenance, increasing operating costs. This application aims to provide a high-voltage electrostatic water processor electrode material with strong corrosion resistance and low fouling deposition rate, as well as its preparation method, to solve the problems existing in the prior art. Summary of the Invention

[0005] This application addresses the aforementioned problems and aims to provide a high-voltage electrostatic water processor electrode material and its preparation method. The electrode material is designed with full consideration of corrosion resistance and anti-fouling properties. A flexible tubular matrix is ​​used as the support structure to ensure the overall strength and stability of the electrode material. A carbon-based conductive layer embedded in the inner wall of the matrix provides excellent conductivity, ensuring a uniform distribution of the high-voltage electrostatic field. A metal support mesh embedded in the matrix not only enhances the mechanical strength of the electrode material but also achieves self-anchoring through radial expansion after thermal activation, improving the bonding force between the electrode material and the matrix. The inner and outer insulating layers covering the matrix have decreasing dielectric constants from the inside out, effectively preventing current leakage and improving the corrosion resistance of the electrode material.

[0006] Specifically, the first aspect of this application provides a high-voltage electrostatic water processor electrode material, comprising:

[0007] Flexible tubular matrix;

[0008] A carbon-based conductive layer composited on the inner wall of the matrix;

[0009] A spiral metal support mesh embedded in a matrix, the metal support mesh being made of nickel-titanium alloy, which achieves self-anchoring by radial expansion after thermal activation;

[0010] The dielectric constants of the inner and outer insulating layers covering the substrate decrease from the inside to the outside, and the difference in dielectric constant between the inner and outer insulating layer materials is ≥15.

[0011] Furthermore, the carbon-based conductive layer comprises nano-carbon materials with an interlayer spacing of ≤1 nm.

[0012] Furthermore, the inner insulating layer is a high-dielectric ceramic composite layer, and the outer insulating layer is a hydrophobic polymer layer.

[0013] Furthermore, the high-dielectric ceramic composite layer BaTiO3@Al2O3 / PVDF composite layer and the hydrophobic polymer layer are fluorosilicone rubber / nano SiO2 composite layers.

[0014] A second aspect of this application provides a method for preparing the electrode material of the high-voltage electrostatic water processor, comprising the following steps:

[0015] (a) Surface activation treatment of the substrate;

[0016] (b) Continuous coating of conductive layer;

[0017] (c) Cold-implanted spiral metal support mesh, followed by heat activation treatment to cause radial expansion of the metal support mesh ≥10%;

[0018] (d) Co-extruded gradient insulation layer;

[0019] (e) Online curing.

[0020] Further, the activation process described in step (a) is plasma activation under a helium / oxygen mixed gas, with a power of 6-10kW and a processing speed of 2-4m / min.

[0021] Further, in step (b), a graphene / carbon nanotube slurry is coated on the inner surface of the substrate to form a conductive layer, with a coating speed ≥2m / min, and then dried by infrared drying.

[0022] Further, the cold implantation described in step (c) is performed at room temperature with an implantation pressure of 0.1-0.5 MPa; and / or

[0023] The thermal activation treatment is achieved by treating the patient with hot water at 70-80℃ for 1-10 minutes.

[0024] After being thermally activated, the metal support mesh forms a mechanically interlocked structure with the substrate, with an anchoring strength ≥20N / mm.

[0025] Furthermore, step (d) employs a dual-barrel co-extrusion system, in which the inner insulating layer BaTiO3@Al2O3 / PVDF composite layer and the outer insulating layer fluorosilicone rubber / nano SiO2 composite layer are extruded from the dual barrels.

[0026] Furthermore, step (e) employs UV curing with a UV intensity of 700-900 mJ / cm. 2 .

[0027] The present invention has the following beneficial effects:

[0028] This invention employs a flexible tubular substrate as a support, composited with a carbon-based conductive layer, which not only improves the conductivity of the electrode material but also enhances its mechanical strength. Simultaneously, the spiral metal support mesh embedded in the substrate further enhances the structural stability of the electrode material. The inner and outer insulating layers covering the substrate not only provide insulation but also, through a design where the dielectric constant decreases from the inside out, optimize the distribution of the electrostatic field and improve the efficiency of water molecule polarization, resulting in an electrode material with excellent corrosion resistance and stable conductivity. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following description and illustration are provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0030] Obviously, the following description is merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios without any inventive effort. Furthermore, it is understood that although the effort involved in such development may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0031] An embodiment of the first aspect of this application provides a high-voltage electrostatic water processor electrode material, comprising:

[0032] Flexible tubular matrix;

[0033] A carbon-based conductive layer composited on the inner wall of the matrix;

[0034] Spiral metal support mesh embedded in the matrix;

[0035] The dielectric constants of the inner and outer insulating layers covering the substrate decrease from the inside to the outside, and the difference in dielectric constant between the inner and outer insulating layer materials is ≥15.

[0036] This invention employs a flexible tubular substrate as a support, composited with a carbon-based conductive layer, which not only improves the conductivity of the electrode material but also enhances its mechanical strength. Simultaneously, the helical metal support mesh embedded in the substrate further enhances the structural stability of the electrode material. The inner and outer insulating layers covering the substrate not only provide insulation but also optimize the electrostatic field distribution through a design where the dielectric constant decreases from the inside out, improving the efficiency of water molecule polarization. The dielectric constant difference between the inner and outer insulating layers is ≥15, resulting in a more uniform electric field distribution and further enhancing the water molecule polarization effect. Furthermore, the dielectric constant difference design effectively prevents current leakage, improving the safety of the electrode material. This gives the electrode material excellent corrosion resistance and stable conductivity.

[0037] In this embodiment, the flexible tubular substrate is made of medical-grade silicone tubing with a wall thickness of approximately 1 mm and a bending radius R = 40 mm. In a preferred embodiment, the medical-grade silicone tubing contains a stainless steel support mesh, which enhances the structural strength of the substrate, making it less prone to deformation or breakage during use. Furthermore, the medical-grade silicone tubing possesses excellent biocompatibility and chemical stability, enabling it to operate stably for extended periods in high-voltage electrostatic fields and aqueous environments without easily corroding or aging, thus ensuring the lifespan and processing effectiveness of the electrode material.

[0038] Furthermore, the carbon-based conductive layer comprises nano-carbon materials with an interlayer spacing ≤ 1 nm. Even further, the carbon-based conductive layer is a graphene / carbon nanotube composite material, continuously coated onto the inner wall of the substrate to form a uniform and dense conductive layer with a thickness of 0.1-0.2 mm. Both graphene and carbon nanotubes possess high conductivity and excellent mechanical properties, effectively improving the conductivity and mechanical strength of the electrode material. Simultaneously, the small interlayer spacing of the nano-carbon materials facilitates electron transport between layers, further enhancing the conductivity of the conductive layer.

[0039] Specifically, the preparation method of the graphene / carbon nanotube composite material involves dispersing graphene and carbon nanotubes in a ratio of 2-3:1 in a bio-based gallic acid epoxy resin, uniformly dispersing the nanocarbon materials by ultrasonic treatment, then adding 1-5% polyvinyl butyral, and stirring until a slurry with a solid content of 20-30% is obtained. The slurry is continuously coated onto the inner wall of the matrix using a coating device, and a conductive layer is formed after infrared drying.

[0040] The spiral metal support mesh is made of nickel-titanium alloy, purchased from Jinbaoji Fanruida Titanium Industry Co., Ltd. The nickel content is typically 55%-56% atomic percentage, with titanium as the balance. The tensile strength reaches 800-1000 MPa, and the fatigue life exceeds 10 years. ^7 The process is repeated. The nickel-titanium alloy support mesh undergoes radial expansion after thermal activation, achieving self-anchoring. The nickel-titanium alloy is a spiral shape memory alloy with an austenitic phase transformation temperature Af = 55-65℃. The pitch of the spiral metal support mesh is 0.5-1.5 times the base diameter, and the embedding depth is 20%-40% of the base wall thickness. Preferably, the pitch is 0.8 times the base diameter, and the embedding depth is 30% of the base wall thickness, effectively enhancing the structural stability and corrosion resistance of the electrode material. The spiral metal support not only enhances the structural stability of the electrode material but also generates a weak eddy current effect under a high-voltage electrostatic field, promoting the polarization of water molecules.

[0041] The inner insulating layer is a high-dielectric ceramic composite layer, and the outer insulating layer is a hydrophobic polymer layer. The high-dielectric ceramic composite layer of the inner insulating layer is made of BaTiO3@Al2O3 / PVDF composite material. The preparation method of BaTiO3@Al2O3 / PVDF composite material is to coat the surface of BaTiO3 nanoparticles with a layer of Al2O3, then mix it with PVDF resin, and obtain it by melt blending and extrusion. BaTiO3 was purchased from Qinghe County Chaotai Metal Materials Co., Ltd., CAS No. 1300-2-4. BaTiO3 has a high dielectric constant, which can effectively improve the dielectric properties of the insulating layer. Al2O3 was also purchased from Qinghe County Chaotai Metal Materials Co., Ltd., CAS No. 1344-2-2. Al2O3, as a coating layer, can enhance the interfacial bonding force between BaTiO3 and PVDF, improving the stability and durability of the composite material. PVDF resin was purchased from Shenzhen Boen New Materials Co., Ltd., model Solef 11010 / 0001, with a tensile strength of 40-55MPa, a flexural strength of 75-78MPa, and a coefficient of thermal expansion of 8-15×10⁻⁶. -5 / ℃, density is 1.75-1.80 g / cm³ 3 The dielectric constant is 8-9 (1kHz), and the volume resistivity is >1×10⁻⁶. 14 Ω·cm. PVDF resin has good processing properties and mechanical strength, making the insulation layer easy to mold and possessing a certain degree of toughness. The high-dielectric ceramic composite layer in the inner insulation layer can optimize the distribution of the electrostatic field and improve the efficiency of water molecule polarization.

[0042] The outer insulating hydrophobic polymer layer is made of fluorosilicone rubber / nano-SiO2 composite material. The fluorosilicone rubber was purchased from Beijing Mifeng Technology Co., Ltd., and its density is 1.5-1.9 g / cm³. 3 The tensile strength is 7-10 MPa. Fluorosilicone rubber possesses excellent hydrophobicity and corrosion resistance, effectively preventing moisture and corrosive substances from eroding the electrode material. Nano-SiO2, purchased from Shandong Haochuang Innovation Materials Technology Co., Ltd., further enhances the hardness and wear resistance of the hydrophobic polymer layer. The synergistic effect of the inner and outer insulating layer composite materials results in excellent insulation properties, as well as good corrosion resistance and mechanical strength, further improving the overall performance of the electrode material.

[0043] A second aspect of this application provides a method for preparing the electrode material of the high-voltage electrostatic water processor, comprising the following steps:

[0044] (a) Surface activation treatment of the substrate;

[0045] (b) Continuous coating of conductive layer;

[0046] (c) Cold-implanted spiral metal support mesh, followed by heat activation treatment to cause radial expansion of the metal support mesh ≥10%;

[0047] (d) Co-extruded gradient insulation layer;

[0048] (e) Online curing.

[0049] In this embodiment, the activation process in step (a) is performed using plasma activation in a helium / oxygen mixed gas (helium / oxygen = 95 / 5), with a power of 6-10 kW, a processing speed of 2-4 m / min, and a processing time of 60-70 s. The activation process simultaneously completes surface cleaning and micro-pit etching to improve the surface roughness and specific surface area of ​​the substrate, thereby enhancing the adhesion between the conductive layer and the substrate. By adjusting the plasma activation parameters, such as power, processing speed, and processing time, the degree of activation on the substrate surface can be precisely controlled, ensuring uniform coating and strong adhesion of the conductive layer.

[0050] In this embodiment, in step (b), a conductive layer is formed on the inner surface of the substrate by coating a graphene / carbon nanotube slurry using a microgravure plate at a speed of 2-4 m / min. By precisely controlling the coating speed and the solid content of the slurry, the conductive layer can be ensured to be uniform and dense, with a thickness controlled within the range of 0.1-0.2 mm. After coating, the conductive layer is rapidly dried using an infrared drying device at a temperature of 120-130°C for 20-30 seconds to remove the solvent from the slurry, allowing the conductive layer to solidify and adhere tightly to the inner wall of the substrate.

[0051] In this embodiment, the nickel-titanium alloy support mesh in step (c) has a mesh density of 100 mesh. The cold implantation is performed at room temperature. The substrate is fixed by a vacuum suction cup, and the nickel-titanium alloy support mesh (Af=60℃) is compressed to 88% of its diameter. A mesh unwinding machine is used to implant the nickel-titanium alloy support mesh into the substrate at an implantation pressure of 0.1-0.5MPa. Then, a silicone roller is used for rolling to ensure a tight bond between the metal support mesh and the substrate. Subsequently, a heat activation treatment is performed. The substrate with the implanted metal support mesh is placed in hot water at 70-80℃ for 1-10 minutes, causing the nickel-titanium alloy support mesh to expand radially by ≥10%, thereby achieving self-anchoring. After the heat activation treatment, a mechanical interlocking structure is formed between the metal support mesh and the substrate, with an anchoring strength ≥20N / mm, effectively enhancing the structural stability and corrosion resistance of the electrode material.

[0052] In this embodiment, step (d) employs a dual-barrel co-extrusion system. The inner insulating layer (BaTiO3@Al2O3 / PVDF composite) and the outer insulating layer (fluorosilicone rubber / nano-SiO2 composite) are extruded from the dual barrels, with a dielectric constant difference between the inner and outer insulating layers ≥15. Specifically, the inner insulating layer (BaTiO3@Al2O3 / PVDF composite) is prepared by melt blending extrusion at a temperature of 200-230℃ to ensure the uniformity and stability of the composite material. The outer insulating layer (fluorosilicone rubber / nano-SiO2 composite) is extruded at a low temperature of 100-150℃ to avoid the influence of high temperatures on the properties of the fluorosilicone rubber. The dual-barrel co-extrusion system allows for precise control of the extrusion speed and thickness of the inner and outer insulating layers, ensuring uniformity and gradient variations. During the co-extrusion process, the inner and outer insulating materials are composited in the mold, forming an insulating layer with a gradient dielectric constant, optimizing the electrostatic field distribution and improving the efficiency of water molecule polarization.

[0053] In this embodiment, step (e) employs UV curing with a UV intensity of 700-900 mJ / cm. 2 The curing time is 1-5 seconds. UV curing has advantages such as high efficiency, environmental friendliness, and energy saving. It can quickly cure the insulation layer while avoiding the thermal stress and deformation that may occur during heat curing. By precisely controlling the UV curing parameters, uniform curing and good performance of the insulation layer can be ensured.

[0054] The electrode material of this invention undergoes a 28kV high voltage withstand test, and the leakage current threshold is ≤0.01mA.

[0055] In summary, the high-voltage electrostatic water processor electrode material and its preparation method provided in this application, through the structural design of a flexible tubular substrate, a carbon-based conductive layer, a spiral metal support network, and a gradient insulating layer, as well as specific preparation steps and parameter control, achieve excellent corrosion resistance and stable conductivity of the electrode material. This electrode material has broad application prospects in high-voltage electrostatic water processors and can effectively improve water treatment efficiency and treatment effect.

[0056] Example

[0057] The following examples describe the disclosure of this invention in more detail. These examples are merely illustrative, as various modifications and variations will be apparent to those skilled in the art within the scope of this disclosure. Unless otherwise stated, all parts, percentages, and ratios reported in the following examples are based on weight. Unless otherwise stated, all reagents used in the examples are available commercially or synthesized using conventional methods and are ready for use without further processing. Unless otherwise stated, all instruments used in the examples are available commercially.

[0058] Example 1

[0059] A high-voltage electrostatic water processor electrode material, comprising:

[0060] Flexible silicone tubular substrate;

[0061] A carbon-based conductive layer is composited on the inner wall of a matrix. The carbon-based conductive layer is made of graphene / carbon nanotube composite material and is composited on the inner wall of the matrix by continuous coating to form a uniform and dense conductive layer with a thickness of 0.1-0.2 mm.

[0062] A spiral metal support mesh embedded in the matrix, the spiral metal support mesh being made of shape memory alloy nickel-titanium alloy;

[0063] The substrate is covered by an inner insulating layer and an outer insulating layer, which include an inner insulating layer of high-dielectric ceramic composite material and an outer insulating layer of hydrophobic polymer material. The inner insulating layer of high-dielectric ceramic composite material is made of BaTiO3@Al2O3 / PVDF composite material; the outer insulating layer of hydrophobic polymer material is made of fluorosilicone rubber / nano-SiO2 composite material. The dielectric constant of the insulating layer decreases from the inside to the outside.

[0064] The preparation method of the electrode material for the high-voltage electrostatic water processor includes the following steps:

[0065] (a) Surface activation treatment of substrate: Plasma activation was carried out in a helium / oxygen mixed gas (helium / oxygen = 95 / 5) with a power of 8kW, a processing speed of 3m / min, and a processing time of 60s;

[0066] (b) Continuous coating of conductive layer: A conductive layer is formed by coating graphene / carbon nanotube slurry using a microgravure plate at a coating speed of 3 m / min and a thickness controlled within the range of 0.1-0.2 mm.

[0067] (c) Cold-implanted spiral metal support mesh, followed by heat activation treatment to cause radial expansion of the metal support mesh ≥10%: At room temperature, the substrate is fixed with a vacuum suction cup, and the nickel-titanium alloy support mesh is compressed to 88% of its diameter. The nickel-titanium alloy support mesh is then implanted into the substrate using a mesh unwinding machine at an implantation pressure of 0.3 MPa. A silicone roller is then used for rolling to ensure a tight bond between the metal support mesh and the substrate. Subsequently, a heat activation treatment is performed by placing the substrate with the implanted metal support mesh in hot water at 70°C for 8 minutes to cause radial expansion of the nickel-titanium alloy support mesh, with an expansion range ≥10%, thereby achieving self-anchoring.

[0068] (d) Co-extrusion of gradient insulation layer: A dual-barrel co-extrusion system is used. The inner insulation layer BaTiO3@Al2O3 / PVDF composite layer is prepared by melt blending extrusion at a temperature of 200℃; the outer insulation layer fluorosilicone rubber / nano SiO2 composite layer is prepared by low-temperature extrusion at a temperature of 100℃. The dielectric constant difference between the inner and outer insulation layer materials is ≥15.

[0069] (e) Online curing: UV intensity of 800 mJ / cm 2 The curing time is 3 seconds.

[0070] Example 2

[0071] This embodiment is basically the same as Embodiment 1, except that the power of plasma activation in step (a) is 9kW, the processing speed is 2m / min, and the processing time is 70s.

[0072] Example 3

[0073] This embodiment is basically the same as Embodiment 1, except that in step (c) the thermal activation treatment, the substrate implanted with the metal support mesh is placed in hot water at 80°C for 5 minutes.

[0074] Example 4

[0075] This embodiment is basically the same as Embodiment 1, except that the extrusion temperature of the inner insulation layer in step (d) is 220°C and the extrusion temperature of the outer insulation layer is 130°C.

[0076] Example 5

[0077] This embodiment is basically the same as Embodiment 1, except that the UV intensity in step (e) is 700 mJ / cm. 2 The curing time is 5 seconds.

[0078] Comparative Example 1

[0079] This comparative example is basically the same as Example 1, except that the nickel-titanium alloy support mesh is replaced with 304 stainless steel mesh.

[0080] Comparative Example 2

[0081] Solid electrodes made of 316L stainless steel.

[0082] Comparative Example 3

[0083] Titanium alloy (Ti6Al4V) electrodes are used.

[0084] Comparative Example 4

[0085] It uses a commercially available ion bar water processor, model LD-IV-3000-27.

[0086] Experimental Case

[0087] (1) Water quality:

[0088] Total hardness: 8.2±0.5 mmol / L; temperature: 70±2℃; pH: 8.2±0.2 (automatic NaHCO3 adjustment); water flow rate: 0.5-2.8m / s.

[0089] (2) Electric field parameters:

[0090] Input voltage: AC220V±20V, 50Hz; Output voltage: DC 25-28 kV; Leakage current monitoring accuracy: 0.1μA.

[0091] (3) Test cycle

[0092] Corrosion rate test: 2000 hours; dirt deposition test: 720 hours.

[0093] Salt spray tests were conducted on Examples 1-5 and Comparative Examples 1-4 according to GB / T 10124, and the results are shown in Table 1.

[0094]

[0095] The fouling deposition rate of Examples 1-5 and Comparative Examples 1-4 was tested, and the results are shown in Table 2.

[0096]

[0097] As shown in Table 1, the electrode materials of Examples 1-5 exhibited extremely low corrosion rates and maximum pitting depths in the salt spray test, while maintaining good surface condition. In contrast, the electrode materials of Comparative Examples 1-4 showed varying degrees of corrosion. Specifically, corrosion occurred at the metal mesh interface of the 304 stainless steel mesh in Comparative Example 1; the 316L stainless steel solid electrode in Comparative Example 2 underwent complete corrosion with a rust layer thickness exceeding 100 μm; the titanium alloy electrode in Comparative Example 3 showed dense localized pitting on its surface; and the commercially available ion bar in Comparative Example 4 corroded at the point of insulation damage. These results demonstrate that the electrode material provided by this invention possesses excellent corrosion resistance.

[0098] As shown in Table 2, the electrode materials of Examples 1-5 all performed well in terms of CaCO3 deposition rate and fouling adhesion strength. Among them, Example 4 showed the highest CaCO3 deposition rate and fouling adhesion strength, but these were still at a relatively low level. In contrast, the electrode materials of Comparative Examples 1-4 exhibited higher deposition rates and fouling adhesion strengths, especially Comparative Examples 2 and 3, whose deposition rates and adhesion strengths were significantly higher than those of the Examples. This indicates that the electrode material provided by this invention has excellent anti-fouling properties, effectively reducing fouling deposition in water processors and improving water treatment efficiency.

[0099] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A high-voltage electrostatic water processor electrode material, characterized in that, include: Flexible tubular matrix; A carbon-based conductive layer composited on the inner wall of the matrix; A spiral metal support mesh embedded in a matrix, the metal support mesh being made of nickel-titanium alloy, which achieves self-anchoring by radial expansion after thermal activation; The dielectric constants of the inner and outer insulating layers covering the substrate decrease from the inside to the outside, and the difference in dielectric constant between the inner and outer insulating layer materials is ≥15.

2. The electrode material for the high-voltage electrostatic water processor according to claim 1, characterized in that, The carbon-based conductive layer contains nano-carbon materials with an interlayer spacing of ≤1nm.

3. The electrode material for the high-voltage electrostatic water processor according to claim 1, characterized in that, The inner insulating layer is a high-dielectric ceramic composite layer, and the outer insulating layer is a hydrophobic polymer layer.

4. A method for preparing the electrode material of a high-voltage electrostatic water processor according to any one of claims 1-3, characterized in that, Includes the following steps: (a) Surface activation treatment of the substrate; (b) Continuous coating of conductive layer; (c) Cold-implanted spiral metal support mesh, followed by heat activation treatment to cause radial expansion of the metal support mesh ≥10%; (d) Co-extruded gradient insulation layer; (e) Online curing.

5. The method for preparing the electrode material of the high-voltage electrostatic water processor according to claim 4, characterized in that, The activation process described in step (a) is plasma activation under a helium / oxygen mixed gas, with a power of 6-10kW and a processing speed of 2-4m / min.

6. The method for preparing the electrode material of the high-voltage electrostatic water processor according to claim 4, characterized in that, In step (b), a graphene / carbon nanotube slurry is coated on the inner surface of the substrate to form a conductive layer at a coating speed of ≥2m / min, followed by infrared drying.

7. The method for preparing the electrode material of the high-voltage electrostatic water processor according to claim 4, characterized in that, The cold implantation described in step (c) is performed at room temperature with an implantation pressure of 0.1-0.5 MPa; and / or The thermal activation treatment is achieved by treating the patient with hot water at 70-80℃ for 1-10 minutes. After being thermally activated, the metal support mesh forms a mechanically interlocked structure with the substrate, with an anchoring strength ≥20N / mm.

8. The method for preparing the electrode material of the high-voltage electrostatic water processor according to claim 4, characterized in that, Step (d) employs a dual-barrel co-extrusion system, where the inner insulating layer BaTiO3@Al2O3 / PVDF composite layer and the outer insulating layer fluorosilicone rubber / nano SiO2 composite layer are extruded from the dual barrels.

9. The method for preparing the electrode material of the high-voltage electrostatic water processor according to claim 4, characterized in that, Step (e) involves UV curing with a UV intensity of 700-900 mJ / cm. 2 .

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