Hydrophilic material and hydrophobic material, preparation method thereof and gas-liquid separation filtering device with hydrophilic material and hydrophobic material

Abstract

The invention discloses a hydrophilic material and a hydrophobic material, a preparation method of the hydrophilic material and the hydrophobic material, and a gas-liquid separation filtering device equipped with the hydrophilic material and the hydrophobic material, the hydrophilic material comprises a substrate surface which is etched into a micro-nano structure, and a hydrophilic layer is formed on the surface of the substrate; the hydrophobic material comprises a base material and a hydrophobic layer, the surface of the base material is etched into a micro-nano structure, and the hydrophobic layer is formed on the surface of the base material; the windward side of the filtering device for gas-liquid separation is made of a hydrophilic material, the air outlet side of the filtering device for gas-liquid separation is made of a hydrophobic material, the hydrophilic material and the hydrophobic material can be folded surfaces or curved surfaces, and water gathered by the hydrophilic material and water intercepted by the hydrophobic material are recycled through water guide holes; the hydrophilic material is formed by carrying out surface plasma treatment activation on a base material and carrying out surface polymerization modification on a hydrophilic monomer; the hydrophobic material is prepared from a base material through surface plasma treatment activation and hydrophobic monomer surface polymerization modification. According to the cooling tower, the heat dissipation and cooling performance of the cooling tower can be guaranteed while the water resource recycling efficiency is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of polymer material modification, and in particular to a hydrophilic material and a hydrophobic material, a preparation method thereof, and a gas-liquid separation filtering device having the same. Background Art

[0002] At present, circulating water cooling tower devices are widely used in various industries, such as semiconductor companies, chemical plants, etc. However, due to the volatilization of water vapor (air flow with water droplets) in the cooling tower during the cooling process, or other open cooling devices using water as a refrigerant, a large amount of water resources will be lost. Specifically, a cooling tower is a device that uses circulating water as a coolant. Its cooling principle is to use circulating water to absorb heat from the system to generate steam and then exchange heat with air flow, and then discharge the heat into the atmosphere. The steam evaporates and takes away the heat to achieve the principles of evaporative heat dissipation, convection heat transfer and radiation heat transfer to dissipate the waste heat generated in industry or refrigeration and air conditioning to reduce the water temperature of the evaporative heat dissipation device to ensure the normal operation of the system. However, due to the huge amount of volatilized steam, a large cooling tower consumes dozens of tons or even more water resources every day. This loss is huge and cannot be ignored. Therefore, in the current context of increasing global awareness of saving resources and protecting the environment, it is particularly important to design a new type of material and use it for circulating water cooling. Summary of the invention

[0003] The purpose of the present invention is to provide a hydrophilic material and a hydrophobic material and apply them to a filter device for gas-liquid separation, in order to solve the technical problem that the cooling operation using circulating water in the cooling process cannot meet the water resource recycling requirements while ensuring the heat dissipation and cooling performance of the cooling tower.

[0004] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0005] The first aspect of the present invention provides a hydrophilic material, comprising: a substrate and a hydrophilic layer, wherein the surface of the substrate is etched into a micro-nano structure, the hydrophilic layer is formed on the surface of the substrate, and the hydrophilic layer is a polymer containing an amide group.

[0006] Furthermore, the hydrophilic layer also includes a micro-nanosphere structure having a silicate group.

[0007] Furthermore, the contact angle of the hydrophilic material to tetrachloromethane in water is greater than 150°.

[0008] The present invention provides a first aspect of a method for preparing a hydrophilic material, comprising the steps of: providing a substrate, etching the substrate to form a micro-nano structure on its surface; adding an olefin monomer containing an acidic group, causing a polymerization reaction on the surface of the substrate to form a polymer containing an acidic group; adding a hydrophilic polyamine reagent, an alcohol solvent and a silicate reagent, which react with the polymer containing the acidic group to form a hydrophilic layer located on the surface of the substrate, wherein the hydrophilic layer is a polymer containing an amide group and contains a micro-nano sphere structure of a silicate group.

[0009] In some technical solutions of the present invention, the mass ratio of the hydrophilic polyamine reagent, the alcohol solvent and the silicate reagent is 1-5wt%: 93.5-98.5wt%: 0.5-1.5wt%.

[0010] In some technical solutions of the present invention, the preparation of the hydrophilic material is carried out in a vacuum plasma surface treatment device, and the etching of the substrate is carried out using at least one of argon, helium, oxygen, CF4 or C4F8, preferably helium and oxygen.

[0011] In some technical solutions of the present invention, the olefin monomer containing an acidic group is an olefin monomer containing a carboxylic acid group, and the olefin monomer containing a carboxylic acid group is at least one of acrylic acid, methacrylic acid, and crotonic acid.

[0012] In some technical solutions of the present invention, the olefin monomer containing a carboxylic acid group is at least one of acrylic acid and methacrylic acid.

[0013] In some technical solutions of the present invention, the olefin monomer containing a carboxylic acid group is acrylic acid.

[0014] In some technical solutions of the present invention, the hydrophilic polyamine reagent is at least one of polyethyleneimine (PEI), ethylenediamine, diethylenetriamine, triethylenetetramine, and tetraethylenepentamine, preferably polyethyleneimine (PEI).

[0015] In some technical solutions of the present invention, the alcohol solvent is an alkyl alcohol, further comprising a C1-C 12 Alkyl alcohol.

[0016] In some technical solutions of the present invention, the alcohol solvent is at least one of methanol, ethanol, propanol, and isopropanol, preferably ethanol.

[0017] In some technical solutions of the present invention, the silicate reagent is methyl orthosilicate, ethyl orthosilicate, propyl orthosilicate, butyl orthosilicate, etc., preferably ethyl orthosilicate.

[0018] The second aspect of the present invention provides a hydrophobic material, comprising: a substrate and a hydrophobic layer, wherein the surface of the substrate is etched into a micro-nano structure, the hydrophobic layer is formed on the surface of the substrate, the hydrophobic layer is a fluorine-containing polymer, and contains a micro-nanosphere structure of a silicate group.

[0019] Furthermore, the contact angle of the hydrophobic material to water is greater than 150°.

[0020] The present invention provides a second aspect of a method for preparing a hydrophobic material, comprising the steps of: providing a substrate, etching the substrate to form a micro-nano structure on its surface; adding an olefin monomer containing an acidic group, causing a polymerization reaction on the surface of the substrate to form an olefin polymer containing an acidic group; adding a mixed solution of an alkoxyfluorosilane, a hydrophobic polyfluorine reagent and a silicate reagent, reacting with the olefin polymer containing an acidic group to form a hydrophobic layer located on the surface of the substrate, wherein the hydrophobic layer is a fluorine-containing polymer and contains a micro-nano sphere structure of a silicate group.

[0021] In some technical solutions of the present invention, the mass ratio of the silicate reagent, the alkoxyfluorosilane and the hydrophobic polyfluorine reagent is 0.5-1.5wt%: 1-5wt%: 93.5-98.5wt%.

[0022] In some technical solutions of the present invention, the preparation of the hydrophobic material is carried out in a vacuum plasma surface treatment device, and the etching of the substrate is carried out using at least one of argon, helium, oxygen, CF4 or C4F8, preferably helium and oxygen.

[0023] In some technical solutions of the present invention, the olefin monomer containing an acidic group is an olefin monomer containing a carboxylic acid group, and the olefin monomer containing a carboxylic acid group is at least one of acrylic acid, methacrylic acid, and crotonic acid.

[0024] In some technical solutions of the present invention, the olefin monomer containing a carboxylic acid group is at least one of acrylic acid and methacrylic acid.

[0025] In some technical solutions of the present invention, the olefin monomer containing a carboxylic acid group is acrylic acid.

[0026] In some technical solutions of the present invention, the alkoxyfluorosilane is at least one of trimethoxyfluorosilane, triethoxyfluorosilane, tripropoxyfluorosilane, and triisopropoxyfluorosilane, preferably triethoxyfluorosilane.

[0027] In some technical schemes of the present invention, the hydrophobic polyfluorinated agent is at least one of tridecafluorooctyltrimethoxysilane, heptadecafluorodecyltriethoxysilane, perfluorohexylethylene, and perfluorooctylethyl acrylate, preferably tridecafluorooctyltrimethoxysilane.

[0028] In some technical solutions of the present invention, the silicate reagent is methyl orthosilicate, ethyl orthosilicate, propyl orthosilicate, butyl orthosilicate, etc., preferably ethyl orthosilicate.

[0029] The present invention also provides a filter device for gas-liquid separation, comprising a hydrophilic material and a hydrophobic material prepared by the above method, wherein the hydrophilic material is arranged on the windward side of the filter device, and the hydrophobic material is arranged on the windward side of the filter device.

[0030] In some technical solutions of the present invention, the hydrophilic material and the hydrophobic material can be folded or curved surfaces, which can increase the contact area between the filter surface and the water vapor, ensure the cooling performance of the water vapor, and also ensure the heat dissipation performance of the device, so as to better gather water resources to achieve the purpose of recycling. The present invention can ensure the water resource recycling efficiency while also ensuring the heat dissipation and cooling performance of the cooling tower.

[0031] Beneficial effects of the present invention: The windward side of the filter device for gas-liquid separation of the present invention is provided with a hydrophilic material, and the windward side is provided with a hydrophobic material, which can filter water vapor so that water droplets in the water vapor are adsorbed, gathered, intercepted and then recovered, and air is allowed to pass through, thereby realizing the separation of air and water droplets to achieve the purpose of recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the contact angle of the hydrophilic material provided in an embodiment of the present invention to tetrachloromethane in water;

[0033] Figure 2 A schematic diagram of the contact angle of the hydrophobic material provided in an embodiment of the present invention to water without adding tetraethyl orthosilicate;

[0034] Figure 3 A schematic diagram of the contact angle of the hydrophobic material provided in an embodiment of the present invention to water after adding tetraethyl orthosilicate;

[0035] Figure 4 An electron microscope image of nanoparticles formed on the surface of a substrate provided in an embodiment of the present invention;

[0036] Figure 5 A cross-sectional view of a hydrophilic material and a hydrophobic material of a gas-liquid separation filter device provided in an embodiment of the present invention;

[0037] In the figure: water guide hole 1, hydrophilic material 2, hydrophobic material 3, skeleton support net 4, water vapor airflow direction 5. DETAILED DESCRIPTION

[0038] In the present disclosure, a numerical range expressed using "to" means a range including the numerical values ​​described before and after "to" as a minimum value and a maximum value, respectively.

[0039] In the numerical ranges recorded in stages in the present disclosure, the upper limit or lower limit recorded in a certain numerical range can be replaced by the upper limit or lower limit of the numerical range recorded in other stages. In the numerical ranges recorded in the present disclosure, the upper limit or lower limit recorded in a certain numerical range can be replaced by the value shown in the embodiment.

[0040] Unless the context clearly indicates otherwise, when used in this specification, the terms “comprise”, “comprising” and “including” specify the presence of stated elements, but do not exclude the presence or addition of one or more other elements.

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0042] In the following examples, unless otherwise specified, all methods are conventional methods; the reagents and materials described, unless otherwise specified, can be obtained from commercial sources.

[0043] The hydrophilic material and the hydrophobic material of the present invention and the gas-liquid separation filter device having the same can filter water vapor, so that water droplets in the water vapor are adsorbed, gathered, intercepted and then recovered, and air is allowed to pass through, so as to achieve separation of air and water droplets. The filter surface of the gas-liquid separation filter device having the hydrophilic material and the hydrophobic material adopts a folded surface or a curved surface, etc., to ensure the cooling performance of the water vapor and the heat dissipation performance of the device, so that water resources can be better gathered to achieve the purpose of recovery. The present invention can ensure the heat dissipation and cooling performance of the cooling tower while ensuring the water resource recovery efficiency.

[0044] The preparation method of the hydrophilic material provided by the present invention comprises the following steps:

[0045] S1: providing a hydrophilic material substrate, using vacuum plasma surface treatment equipment (PECVD), introducing gas, etching, activating and cleaning the surface of the substrate;

[0046] In this embodiment, the hydrophilic substrate may be a chemical fiber non-woven fabric such as nylon 6 (PA6), nylon 66 (PA66), acrylic fiber (PAN), polyester (PET), polybutylene terephthalate (PBT), etc.

[0047] In this embodiment, the gas used for etching, activation and cleaning is at least one of argon, helium, oxygen, CF4 or C4F8, preferably helium and oxygen. Micro-nano structures are formed on the surface of the substrate through etching to increase the roughness of the substrate surface.

[0048] S2: introducing an olefin monomer containing an acidic group and polymerizing it on the surface of the substrate to form a polymer containing an acidic group;

[0049] In this embodiment, the olefin monomer containing an acidic group may be an olefin monomer containing a carboxylic acid group. The olefin monomer containing a carboxylic acid group may be exemplified by acrylic acid, methacrylic acid, crotonic acid, etc., preferably at least one of acrylic acid or methacrylic acid, more preferably acrylic acid.

[0050] Furthermore, the olefin monomer containing the acidic group forms a polymer containing the acidic group through a chain polymerization reaction under suitable reaction conditions, thereby increasing the proportion of active groups on the surface of the substrate and improving the wettability of the material surface.

[0051] S3: adding an alcohol solvent containing a hydrophilic polyamine reagent to react with the polymer containing an acidic group to form a hydrophilic layer of the polymer containing an amide group;

[0052] In this embodiment, the hydrophilic polyamine reagent may be at least one of polyethyleneimine (PE I), ethylenediamine, diethylenetriamine, triethylenetetramine, and tetraethylenepentamine, preferably polyethyleneimine (PE I).

[0053] In this embodiment, the alcohol solvent can be an alkyl alcohol, further comprising C1-C 12 Alkyl alcohol, C1-C 12 It represents the number of carbon atoms, carbon atoms are the main chain, the carbon chain can be straight chain or branched, the substituent can be a hydrogen atom and at least one hydroxyl group, the alkyl alcohol can be at least one of methanol, ethanol, propanol, and isopropanol, preferably ethanol.

[0054] In this embodiment, a silicate reagent can also be added. The silicate reagent can be methyl orthosilicate, ethyl orthosilicate, propyl orthosilicate (including isopropyl orthosilicate), butyl orthosilicate (including isobutyl orthosilicate, sec-butyl orthosilicate, tert-butyl orthosilicate), etc., preferably ethyl orthosilicate; the silicate reagent can react with the polymer containing acidic groups on the hydrophilic substrate to form a micro-nano sphere structure, further improving the surface roughness of the substrate.

[0055] Furthermore, polyethyleneimine with a molecular weight of 300, 600 or 1200 g / mol and a mass fraction of 1 to 5 wt% is mixed with 95 to 99 wt% ethanol to form a solution.

[0056] Furthermore, the mass ratio of the hydrophilic polyamine reagent, the alcohol solvent and the silicate reagent is 1-5wt%:93.5-98.5wt%:0.5-1.5wt%, preferably 1-5wt%:94-98wt%:1wt%.

[0057] In this embodiment, the reaction is vacuum heated and gasified in a vacuum plasma surface treatment device (PECVD), and after gasification, it is sent into a reaction chamber, and plasma-induced polymerization is carried out on the surface of the substrate. The primary amine and secondary amine of polyethyleneimine react with part of the acrylic acid that does not participate in the polymerization reaction and the carboxyl group on the substrate to undergo a condensation reaction; polyethyleneimine itself is difficult to gasify or flow, and it is easy to clog the equipment pipeline. If volatile ethanol is used as a solvent, it can be diluted and the fluidity can be improved. Ethanol is easy to gasify, and in the process, polyethyleneimine molecules are carried to improve its dispersion uniformity.

[0058] Furthermore, the heating temperature is 140-160° C., and the vacuum degree is 20-60 Pa.

[0059] The preparation method of the hydrophobic material provided by the present invention comprises the following steps:

[0060] S1: providing a hydrophobic material substrate, using vacuum plasma surface treatment equipment (PECVD), introducing gas, etching, activating and cleaning the surface of the substrate;

[0061] In this embodiment, the hydrophobic substrate may be a chemical fiber non-woven fabric such as nylon 6 (PA6), nylon 66 (PA66), acrylic fiber (PAN), polyester (PET), polybutylene terephthalate (PBT), etc.

[0062] In this embodiment, the gas used for etching, activation and cleaning is at least one of argon, helium, oxygen, CF4 or C4F8, preferably helium and oxygen. Micro-nano structures are formed on the surface of the substrate through etching to increase the roughness of the substrate surface.

[0063] S2: introducing an olefin monomer containing an acidic group and polymerizing it on the surface of the substrate to form a polymer containing an acidic group;

[0064] In this embodiment, the olefin monomer containing an acidic group may be an olefin monomer containing a carboxylic acid group. The olefin monomer containing a carboxylic acid group may be exemplified by acrylic acid, methacrylic acid, crotonic acid, etc., preferably at least one of acrylic acid or methacrylic acid, more preferably acrylic acid.

[0065] Furthermore, the olefin monomer containing the acidic group forms a polymer containing the acidic group through a chain polymerization reaction under suitable reaction conditions, thereby increasing the proportion of active groups on the surface of the substrate and improving the wettability of the material surface.

[0066] S3: adding a mixture of alkoxyfluorosilane, hydrophobic polyfluorine reagent and silicate reagent to react with the polymer containing acidic groups to form a hydrophobic layer of fluorine-containing polymer;

[0067] In the present embodiment, the alkoxy fluorosilane may be at least one of trimethoxy fluorosilane, triethoxy fluorosilane, tripropoxy fluorosilane, and triisopropoxy fluorosilane, preferably triethoxy fluorosilane.

[0068] In this embodiment, the hydrophobic polyfluorinated agent can be at least one of tridecafluorooctyltrimethoxysilane, heptadecafluorodecyltriethoxysilane, perfluorohexylethylene, and perfluorooctylethyl acrylate, preferably tridecafluorooctyltrimethoxysilane.

[0069] In this embodiment, the silicate reagent can be methyl orthosilicate, ethyl orthosilicate, propyl orthosilicate (including isopropyl orthosilicate), butyl orthosilicate (including isobutyl orthosilicate, sec-butyl orthosilicate, tert-butyl orthosilicate), etc., preferably ethyl orthosilicate; the silicate reagent can react with the polymer containing acidic groups on the hydrophilic substrate to form a micro-nano sphere structure, further improving the surface roughness of the substrate.

[0070] Silicates are a class of organic silicon compounds, whose molecular structure contains a silicon-oxygen bond (Si-O) and a substituent connected to the oxygen in the silicon-oxygen bond. The substituent can be an alkyl group or an alkoxy group. The alkyl group can be C 1-5 Alkyl, including methyl, ethyl, propyl, isopropyl, butyl, pentyl, etc.; alkoxy can be C 1-5 Alkoxy groups include methoxy, ethoxy, propoxy, isopropoxy, butoxy and the like.

[0071] Furthermore, the mass ratio of the silicate reagent, the alkoxyfluorosilane and the hydrophobic polyfluorine reagent is 0.5-1.5wt%: 1-5wt%: 93.5-98.5wt%, preferably 1wt%: 1-5wt%: 94-98wt%.

[0072] In this embodiment, the mixed liquid is vacuum heated and vaporized in a vacuum plasma surface treatment device (PECVD), and then sent into a reaction chamber for plasma-induced polymerization on the surface of the substrate to form a fluorine-containing polymer on the surface of the substrate, thereby increasing the fluorine content on the surface of the substrate and reducing the surface tension of the material.

[0073] Furthermore, the heating temperature is 140-160° C., and the vacuum degree is 20-60 Pa.

[0074] Example 1: Preparation of hydrophilic material

[0075] The hydrophilic material substrate is a chemical fiber non-woven fabric such as nylon 6 (PA6), nylon 66 (PA66), acrylic fiber (PAN), polyester (PET), polybutylene terephthalate (PBT), etc., and a vacuum plasma surface treatment device (PECVD) is used to first introduce oxygen and helium to etch, activate, and clean the surface, and then introduce vaporized acrylic acid or methacrylic acid gas to polymerize on the surface of the substrate to form polyacrylic acid or polymethacrylic acid, thereby increasing the proportion of active groups on the surface of the substrate and improving the surface wettability of the material;

[0076] Then, a PECVD device is used to introduce a vaporized polyethyleneimine (PEl) ethanol solution, wherein the polyethyleneimine with a molecular weight of 300, 600, or 1200 g / mol and a mass fraction of 1 to 5 wt% is mixed with 95 to 99 wt% ethanol to form a solution, and then the PECVD device is used for vacuum heating and vaporization (vaporization parameters: heating temperature is 140 to 160° C., and vacuum degree is 20 to 60 Pa). After vaporization, the solution is sent into a reaction chamber, and plasma-induced polymerization is carried out on the surface of the substrate. The primary amine and secondary amine of the polyethyleneimine undergo a condensation reaction with a portion of acrylic acid or methacrylic acid that does not participate in the polymerization reaction, as well as carboxyl and hydroxyl groups on the substrate.

[0077] Example 2: Preparation of hydrophobic material:

[0078] The hydrophobic material substrate is a chemical fiber non-woven fabric such as nylon 6 (PA6), nylon 66 (PA66), acrylic fiber (PAN), polyester (PET), polybutylene terephthalate (PBT), etc., and vacuum plasma surface treatment equipment (PECVD) is used to first introduce oxygen and helium to etch, activate and clean the surface, and then introduce vaporized acrylic acid or methacrylic acid gas to polymerize on the surface of the substrate to form polyacrylic acid or polymethacrylic acid, thereby increasing the proportion of active groups on the surface of the substrate.

[0079] Then, PECVD equipment is used to perform vacuum heating and gasification on a mixed liquid of tetraethyl orthosilicate (1wt%), triethoxyfluorosilane (1-5wt%), and tridecafluorooctyltrimethoxysilane (94-98wt%) (gasification parameters: heating temperature is 140-160°C, vacuum degree is 20-60Pa), and after gasification, it is sent into a reaction chamber to perform plasma-induced polymerization on the surface of the substrate to form a fluorine-containing polymer on the surface of the substrate, thereby increasing the fluorine content on the surface of the substrate and reducing the surface tension of the material. Tetraethyl orthosilicate reacts with polyacrylic acid or polymethacrylic acid on the substrate to form a micro-nanosphere structure.

[0080] The raw materials listed in the present invention, as well as the upper and lower limits and interval values ​​of the raw materials of the present invention, and the upper and lower limits and interval values ​​of the process parameters can all realize the present invention, and the embodiments are not listed one by one here.

[0081] The present invention proposes hydrophilic materials and hydrophobic materials, which can be referred to Figures 1 to 4 In order to understand the electron microscope image of the nanoparticles formed on the surface of the substrate prepared by the present invention and the contact angle schematic diagram of the hydrophilic material and the hydrophobic material obtained by testing, the hydrophilic material and the hydrophobic material will be described in detail in conjunction with specific drawings.

[0082] Figure 1 As shown, the contact angle of the hydrophilic material prepared by the steps of the above-mentioned Example 1 to tetrachloromethane in water is 153°. The test method is as follows: at room temperature, the hydrophilic material is immersed in water, and then a drop of carbon tetrachloride is dropped. The carbon tetrachloride forms a spherical shape on the surface of the hydrophilic material, and the contact angle of the hydrophilic material to tetrachloromethane in water is measured; further, 0.5-1.5wt% of tetraethyl orthosilicate is added to the ethanol solution of polyethyleneimine in Example 1 to form a micro-nano sphere structure containing silicate groups, which will further improve the hydrophilicity of the hydrophilic material, and the contact angle to tetrachloromethane in water will be greater than 153°.

[0083] Figure 2 As shown, the contact angle of the hydrophobic material prepared by the steps of Example 2 above without adding ethyl orthosilicate to water is 132°; Figure 3 As shown, the contact angle of the hydrophobic material obtained by the preparation method of the above-mentioned Example 2 to water is 152°; Figure 4 As shown, a vacuum plasma surface treatment device is used to form a micro-nano structure on the surface of a substrate through helium and oxygen etching, and tetraethyl orthosilicate is added to form a micro-nano sphere structure by condensation reaction on the hydrophilic material and the hydrophobic material; specifically, the micro-nano structure formed by helium and oxygen etching provides the roughness of the basic surface, and then tetraethyl orthosilicate is added to initiate a carboxyl reaction of the polymerization with the substrate surface to form polyacrylic acid through PECVD, and dense micro-nano spheres are formed on the substrate surface, which further improves the roughness of the substrate surface, and also further improves the hydrophilicity and hydrophobicity of the substrate surface.

[0084] The water contact angle of the super-hydrophobic coating prepared by using tetraethyl orthosilicate in the present invention is above 150°, while the water contact angle of the traditional super-hydrophobic coating is below 135°. The super-hydrophobic coating treated with tetraethyl orthosilicate has excellent hydrophobicity, which provides a new idea for solving the problem of further improving the hydrophobicity of hydrophobic materials.

[0085] Figure 5As shown, a cross-sectional view of a gas-liquid separation filtering device using a hydrophilic material and a hydrophobic material is shown, wherein a hydrophilic material 2 and a hydrophobic material 3 are placed one after the other, the hydrophilic material 2 is arranged on the windward side of a water vapor airflow flow direction 5, the function of the hydrophilic material 2 is to adsorb and gather water droplets in the water vapor airflow, the hydrophobic material 3 is arranged on the windward side of a water vapor airflow flow direction 5, the function of the hydrophobic material 3 is to prevent the droplets gathered and recovered by the hydrophilic material 2 from being blown out by the airflow, a skeleton support net 4 is arranged on the back of the hydrophilic material 2 and the hydrophobic material 3, the hydrophilic material 2 and the hydrophobic material 3 are laid on the skeleton support net 4 to support the materials, and a water guide hole 1 is arranged on the windward side of the hydrophilic material 2 and between the hydrophilic material 2 and the hydrophobic material 3 for To recycle the water droplets after aggregation and interception; in order to increase the contact area as needed, the hydrophilic material 2 and the hydrophobic material 3 can be installed in the device by folding or curved surfaces; the hydrophilic material 2 is made of chemical fiber non-woven fabrics such as nylon 6 (PA6), nylon 66 (PA66), acrylic fiber (PAN), polyester (PET), polybutylene terephthalate (PBT), etc., which are activated by surface plasma treatment and modified by surface polymerization of hydrophilic monomers; the hydrophobic material 3 is made of chemical fiber non-woven fabrics such as nylon 6 (PA6), nylon 66 (PA66), acrylic fiber (PAN), polyester (PET), polybutylene terephthalate (PBT), etc., which are activated by surface plasma treatment and modified by surface polymerization of hydrophobic monomers.

[0086] Specifically, the gas-liquid separation filtration device having the above-mentioned hydrophilic material and hydrophobic material adopts a plate-type, V-type, cylindrical, or bag-type filter structure as a whole. The airflow carrying water droplets first contacts the hydrophilic material, which adsorbs and gathers tiny water droplets. The penetrating airflow then contacts the hydrophobic material to further intercept the water droplets and allow air to pass through. The water gathered by the hydrophilic material and the water intercepted by the hydrophobic material are recovered through the water guide holes to achieve separation of air and water droplets.

[0087] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by technicians familiar with the technical field within the technical scope disclosed in the present invention should be covered within the protection scope of the present invention.

Claims

1. A hydrophilic material, characterized in that: The invention comprises: a substrate and a hydrophilic layer. The surface of the substrate is etched into a micro-nano structure. The hydrophilic layer is formed on the surface of the substrate. The hydrophilic layer is a polymer containing an amide group and contains a micro-nano ball structure of a silicate group.

2. The hydrophilic material according to claim 1, characterized in that The contact angle of the hydrophilic material to tetrachloromethane in water is greater than 150°.

3. A method for preparing a hydrophilic material, characterized in that: The preparation method comprises the steps of: Providing a substrate, and etching the substrate to form a micro-nano structure on its surface; Adding an olefin monomer containing an acidic group, a polymerization reaction occurs on the surface of the substrate to form a polymer containing an acidic group; Hydrophilic polyamine reagents, alcohol solvents and silicate reagents are added to react with the polymer containing acidic groups to form a hydrophilic layer located on the surface of the substrate. The hydrophilic layer is a polymer containing amide groups and contains micro-nanosphere structures of silicate groups.

4. The preparation method according to claim 3, characterized in that: The mass ratio of the hydrophilic polyamine reagent, the alcohol solvent and the silicate reagent is 1-5wt%: 93.5-98.5wt%: 0.5-1.5wt%.

5. The preparation method according to claim 3, characterized in that: The preparation of the hydrophilic material is carried out in a vacuum plasma surface treatment device, and the etching of the substrate is carried out using oxygen and helium.

6. The preparation method according to claim 3, characterized in that: The olefin monomer containing an acidic group is an olefin monomer containing a carboxylic acid group.

7. The preparation method according to claim 6, characterized in that: The olefin monomer containing a carboxylic acid group is acrylic acid.

8. The preparation method according to claim 3, characterized in that: The hydrophilic polyamine reagent is at least one of polyethyleneimine, ethylenediamine, diethylenetriamine, triethylenetetramine and tetraethylenepentamine.

9. The preparation method according to claim 3, characterized in that: The alcohol solvent is at least one of methanol, ethanol, propanol and isopropanol.

10. The preparation method according to claim 3, characterized in that: The silicate reagent is ethyl orthosilicate.

11. A hydrophobic material, characterized in that: The invention comprises: a substrate and a hydrophobic layer. The surface of the substrate is etched into a micro-nano structure. The hydrophobic layer is formed on the surface of the substrate. The hydrophobic layer is a fluorine-containing polymer and contains a micro-nano ball structure of a silicate group.

12. The hydrophobic material according to claim 11, characterized in that The contact angle of the hydrophobic material to water is greater than 150°.

13. A method for preparing a hydrophobic material, characterized in that: The preparation method comprises the steps of: Providing a substrate, and etching the substrate to form a micro-nano structure on its surface; Adding an olefin monomer containing an acidic group, causing a polymerization reaction on the surface of the substrate to form an olefin polymer containing an acidic group; A mixed solution of alkoxyfluorosilane, hydrophobic polyfluorine reagent and silicate reagent is added to react with the olefin polymer containing acidic groups to form a hydrophobic layer located on the surface of the substrate. The hydrophobic layer is a fluorine-containing polymer and contains a micro-nanosphere structure of silicate groups.

14. The preparation method according to claim 13, characterized in that: The mass ratio of the silicate reagent, the alkoxy fluorosilane and the hydrophobic polyfluorine reagent is 0.5-1.5 wt %: 1-5 wt %: 93.5-98.5 wt %.

15. The preparation method according to claim 13, characterized in that: The preparation of the hydrophobic material is carried out in a vacuum plasma surface treatment device, and the etching of the substrate is carried out using oxygen and helium.

16. The preparation method according to claim 13, characterized in that: The olefin monomer containing an acidic group is an olefin monomer containing a carboxylic acid group.

17. The preparation method according to claim 13, characterized in that: The olefin monomer containing a carboxylic acid group is acrylic acid.

18. The preparation method according to claim 13, characterized in that: The alkoxy fluorosilane is at least one of trimethoxy fluorosilane, triethoxy fluorosilane, tripropoxy fluorosilane and triisopropoxy fluorosilane.

19. The preparation method according to claim 13, characterized in that: The hydrophobic polyfluorinated agent is at least one of tridecafluorooctyltrimethoxysilane, heptadecafluorodecyltriethoxysilane, perfluorohexylethylene, and perfluorooctylethyl acrylate.

20. The preparation method according to claim 13, characterized in that: The silicate reagent is ethyl orthosilicate.

21. A gas-liquid separation filtering device, characterized in that: It includes the hydrophilic material described in claim 1 or 2 or the hydrophilic material prepared as claimed in any one of claims 3-10, and the hydrophobic material described in claim 11 or 12 or the hydrophobic material prepared as claimed in any one of claims 13-20, wherein the hydrophilic material is arranged on the windward side of the filter device, and the hydrophobic material is arranged on the windward side of the filter device.

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