A negative oxygen ion cathode composite material, its preparation method and application

Abstract

This invention provides a negative ion cathode composite material, its preparation method, and its application. The negative ion cathode composite material of this invention comprises the following components in parts by weight: 45-55 parts modified acrylic emulsion, 0.5-2 parts defoamer, 1.5-2.5 parts N,N-dimethyl-β-hydroxyethyl octadecylamide γ-propyl quaternary ammonium nitrate, 25-35 parts modified nano-tourmaline powder, and 15-25 parts ethylene tert-carbonate. The negative ion cathode composite material of this invention uses ethylene tert-carbonate and modified acrylic emulsion as low-temperature dispersion carriers, and simultaneously incorporates a defoamer, which maximizes the activation and dispersion of nano-tourmaline, improving its ability to release negative ions and significantly increasing the negative ion concentration in the space. Furthermore, N,N-dimethyl-β-hydroxyethyl octadecylamide γ-propyl quaternary ammonium nitrate enables more uniform and widespread dispersion of negative ions, significantly increasing the negative ion coverage area in the space.

Description

Technical Field

[0001] This invention relates to the field of negative oxygen ion technology, and in particular to a negative oxygen ion cathode composite material, its preparation method, and its application. Background Technology

[0002] The existing active negative ion generation technology mainly works by processing the input DC or AC power, then boosting it to high AC voltage through pulsed circuits and high-voltage isolation lines. This high AC voltage is then rectified and filtered by special-grade electronic materials to obtain a pure negative DC voltage. This negative DC voltage is connected to a release tip made of metal or carbon, which generates a high corona discharge, rapidly releasing a large number of electrons. These electrons cannot remain in the air for long and are immediately captured by oxygen molecules, thus generating negative air ions.

[0003] Active negative ion generation technology has a wide range of applications, not only for improving indoor air quality but also for improving the passenger environment in vehicles such as cars. Furthermore, negative ion generators also have some applications in the medical and healthcare fields. However, the application of active negative ion technology in indoor spaces presents the following problems: 1) Negative ion generators consume a large amount of electricity, resulting in energy waste; 2) Negative ions exist in a space for a very short time, making it impossible for machines to achieve full coverage of negative ions in the space; 3) Negative ion generators are constantly in a high-voltage discharge state, making the equipment prone to damage and resulting in high maintenance costs; 4) Negative ion generators produce ozone during operation, which is detrimental to health; 5) Negative ion generators can cause noise and airflow disturbances, leading to a poor user experience.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a negative oxygen ion cathode composite material, its preparation method and application. This composite material can maximize the activation and dispersion of nano-tourmaline, improve the ability of nano-tourmaline to release negative oxygen ions, and greatly increase the concentration and coverage area of ​​negative ions in the space.

[0006] The negative oxygen ion cathode composite material of the present invention comprises the following components in parts by weight: 45-55 parts of modified acrylic emulsion, 0.5-2 parts of defoamer, 1.5-2.5 parts of N,N-dimethyl-β-hydroxyethyl octadecylamide γ-propyl quaternary ammonium nitrate, 25-35 parts of modified nano-tourmaline powder, and 15-25 parts of tert-butyl carbonate.

[0007] Preferably, the negative oxygen ion cathode composite material of the present invention comprises the following components in parts by weight: 50 parts of modified acrylic emulsion, 1-2 parts of defoamer, 2 parts of N,N-dimethyl-β-hydroxyethyl octadecylamide γ-propyl quaternary ammonium nitrate, 28-30 parts of modified nano tourmaline powder, and 17-20 parts of tert-butyl carbonate.

[0008] Furthermore, the modified nano-tourmaline powder is composed of nano-tourmaline powder and borate, with a weight ratio of nano-tourmaline powder to borate of (3-5):(5-7); the particle size of the nano-tourmaline powder is 1000-3000 mesh, for example, 2000 mesh.

[0009] Nano-tourmaline is a borosilicate mineral with a complex structure and composition, belonging to the trigonal crystal system. Because tourmaline contains five polyhedra, when the pressure or temperature acting on the crystal surface changes, the internal polyhedra will be distorted, with the T polyhedron being the most distorted. As a result, polarization charges appear on the two crystal end faces perpendicular to the c-axis, which macroscopically manifests as a permanent electrostatic field around the tourmaline that is unaffected by the external electric field.

[0010] When the pressure or temperature acting on the crystal surface changes, the external stress or thermal expansion of the crystal can polarize the unidirectional polar axis (c-axis) in the tourmaline crystal. This causes relative displacement of charged particles within the crystal, resulting in a shift in the centers of positive and negative charges along the c-axis. This leads to a change in the total polarity of the crystal, and the resulting polarization charge is much greater than the spontaneous polarization effect. This gives tourmaline its piezoelectric and pyroelectric effects, and its strong far-infrared radiation capabilities. Simultaneously, changes in temperature and pressure also create a potential difference in the tourmaline crystal, ionizing the surrounding air. The struck electrons interact with nearby water and oxygen molecules, converting them into negative oxygen ions.

[0011] Furthermore, research shows that the ability of nano-tourmaline powder to release negative oxygen ions is greatly related to its particle size and distribution. This invention uses ethylene tert-carbonate and modified acrylic emulsion as low-temperature dispersion carriers and combines them with defoamers. Stirring under constant temperature ultrasonic conditions can maximize the activation and dispersion of nano-tourmaline powder, thereby improving the ability of nano-tourmaline to release negative oxygen ions and greatly increasing the concentration of negative ions in the space.

[0012] The molecular formula of N,N-dimethyl-β-hydroxyethyloctadecylamide γ-propyl quaternary ammonium nitrate is as follows:

[0013]

[0014] N,N-Dimethyl-β-hydroxyethyloctadecylamide-γ-propyl quaternary ammonium nitrate can be uniformly distributed in PVC and nano-tourmaline coatings. Its molecular structure and anionic properties allow it to propel negative oxygen ions into the air like a spring, resulting in a more uniform and widespread dispersion of negative oxygen ions and significantly increasing the negative ion coverage area within the space. Furthermore, N,N-dimethyl-β-hydroxyethyloctadecylamide-γ-propyl quaternary ammonium nitrate and ethylene tert-carbonate can improve the film-forming properties of the wall covering, resulting in a better appearance and quality.

[0015] The present invention also provides a method for preparing the above-mentioned negative oxygen ion cathode composite material, comprising: mixing the components according to the weight parts, and then stirring evenly under ultrasonic conditions; wherein the stirring temperature is 30-40℃ and the stirring time is 20-40min.

[0016] The present invention also provides a negative oxygen ion cathode composite paste, comprising the following components in parts by weight: 10-20 parts of the above-mentioned negative oxygen ion cathode composite material and 80-90 parts of printing medium; preferably, the printing medium is an aqueous acrylic printing medium.

[0017] The present invention also provides a method for preparing the above-mentioned negative oxygen ion cathode composite slurry, comprising: mixing each component according to the weight parts and stirring evenly; preferably, the stirring speed is 1100-1300 r / min and the stirring time is 5-15 min.

[0018] The present invention also provides the application of the above-mentioned negative oxygen ion cathode composite material or the above-mentioned negative oxygen ion cathode composite slurry in the preparation of passive negative oxygen ion wall coverings.

[0019] This invention also provides a method for preparing a passive negative ion wall covering, comprising the following steps:

[0020] S1: The above-mentioned negative oxygen ion cathode composite slurry is evenly coated onto the surface of the wall fabric;

[0021] S2: The coated wall fabric is dried and cooled to obtain a passive negative oxygen ion wall fabric.

[0022] In step S1, the coating amount of the negative oxygen ion cathode composite slurry is 20-25 g / m². 2 The preparation method of the wall covering includes: preparing a PVC film using a wall covering coating composition, hot-laminating the prepared PVC film onto a base fabric while it is still hot, and cooling it with a cooling roller to obtain the wall covering.

[0023] The wall covering coating composition comprises the following components in parts by weight: 100 parts PVC resin, 30-35 parts dioctyl terephthalate (DOTP), 4-6 parts epoxidized soybean oil, 2-3 parts composite calcium-zinc stabilizer, 18-30 parts stone powder, 28-32 parts aluminum hydroxide, 4-6 parts environmentally friendly flame retardant, 13-15 parts titanium dioxide, and 0.2-0.4 parts stearic acid.

[0024] Preferably, the wall covering coating composition comprises the following components in parts by weight: 100 parts PVC resin, 30-32 parts dioctyl terephthalate (DOTP), 4-5 parts epoxidized soybean oil, 2-3 parts composite calcium-zinc stabilizer, 20-30 parts stone powder, 28-30 parts aluminum hydroxide, 5 parts environmentally friendly flame retardant, 14 parts titanium dioxide, and 0.2-0.3 parts stearic acid.

[0025] Furthermore, the composite calcium-zinc stabilizer includes a calcium-zinc stabilizer and a barium-zinc stabilizer, and the mass ratio of the calcium-zinc stabilizer to the barium-zinc stabilizer in the composite calcium-zinc stabilizer is 1:(1-2).

[0026] More specifically, the preparation of the wall covering includes the following steps:

[0027] A) Add each component of the wall covering coating composition to a high-speed mixing equipment according to the weight parts and stir to mix to obtain a mixture;

[0028] B) The mixture is conveyed to a mixing chamber for mixing, and then conveyed to a two-roll extruder for further mixing to obtain the mixed material.

[0029] C) The mixed materials are conveyed to the film pressing machine for film pressing. The film formed by film pressing is heat-bonded onto the base fabric, then cooled by cooling rollers, and then printed and embossed by a gravure printing machine to obtain the wall fabric.

[0030] In step A), keep warm and stir at 40-50℃ for 4-6 minutes.

[0031] In step B), the mixture is stirred at 130-140℃ for 5-10 minutes; the mixing time is 3-5 minutes.

[0032] In step C), the heat transfer temperature is 165-185℃, preferably 170-180℃; the printing temperature is 100-120℃; and the embossing temperature is 185-205℃, preferably 200-205℃.

[0033] The aforementioned wall covering coating composition can improve the film-forming quality of the PVC film and its adhesion to the base fabric, resulting in good adhesion strength and durability, thus improving the quality of the wall covering. Simultaneously, by directly heat-bonding the PVC film onto the base fabric during the PVC film preparation process, the generation of VOCs and static electricity during traditional cold-bonding effectively avoids the depletion of negative oxygen ions and the negative impact on product quality caused by VOCs and static electricity. Furthermore, the method of first printing and embossing normally and then treating the negative oxygen ion material maximizes the utilization of the negative oxygen ion material's ability to stimulate negative oxygen ions, thereby improving the negative oxygen ion effect of the passive negative oxygen ion wall covering.

[0034] In step S2, the machine speed (i.e., the linear speed of the printing roller) is set to 15-25 m / min, preferably 20-25 m / min, according to the depth of the wall fabric texture; the temperature is set to 100-150℃, preferably 130-150℃; the drying temperature is set to 100-120℃; and the drying time is set to 20-25 s.

[0035] This invention optimizes the composition of the negative ion cathode composite material and the preparation process of the passive negative ion wall covering. By using different molecular materials and taking advantage of temperature and pressure differences in the air, negative ions are formed on the surface of the material. Electrons are ejected through the electrostatic molecular functional groups of the cathode, allowing the negative ions to be distributed more widely in the space. At the same time, taking advantage of the practicality of wall coverings requiring whole-house decoration, a large number of negative ions are passively released throughout the space without the use of electrical energy or other chemical energy. This creates a high-negative-ion environment in the entire space, which is both harmonious and aesthetically pleasing, as well as a healthy environment with high negative ions. It is quiet, noiseless, and undisturbed by airflow, providing an excellent user experience. Detailed Implementation

[0036] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this application. As used herein, the singular form includes the plural form unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this description, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0038] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] The raw materials used in each embodiment are as follows:

[0040] PVC resin: Type V suspension PVC resin, model S-1000, viscosity 1.87-1.89, moisture 0.05-0.08%, purchased from Beijing Zhonghe Yongchang Economic and Trade Co., Ltd.

[0041] Epoxidized soybean oil: model HM-01AD, purchased from Suzhou Easio New Material Technology Co., Ltd.;

[0042] Stone powder: Model CC-902, oil absorption value 35-38%, moisture content 0.04-0.08%, purchased from Guangxi Hezhou Kelong Powder Co., Ltd.;

[0043] Environmentally friendly flame retardant: purchased from Liuyang Baolin Electrical New Materials Co., Ltd.

[0044] Modified acrylic emulsion: Model EMX-6A, solid content 21-24%, pH value 7.5, purchased from Shanghai Dongxing Environmental Protection Ink Co., Ltd.;

[0045] Nano tourmaline powder: 2000 mesh particle size, purchased from Beijing Senhai Oxygen Source Technology Co., Ltd.;

[0046] Defoamer: Stearyl alcohol, purchased from Shanghai Dongxing Environmental Protection Ink Co., Ltd.;

[0047] N,N-Dimethyl-β-hydroxyethyloctadecylamide γ-propyl quaternary ammonium nitrate: purchased from Juli Chemical;

[0048] Water-based acrylic printing media: Model EMW, pH 7.5-9.5, viscosity (No. 3 Zahn cup, 25℃) 15-50 seconds, fineness better than 25μm, purchased from Shanghai Dongxing Environmental Protection Ink Co., Ltd.

[0049] Example 1

[0050] This embodiment provides a negative oxygen ion cathode material, comprising the following components in parts by weight: 50 parts modified acrylic emulsion, 1 part defoamer, 2 parts N,N-dimethyl-β-hydroxyethyl octadecylamide γ-propyl quaternary ammonium nitrate, 30 parts modified nano tourmaline powder, and 17 parts tert-butyl carbonate; wherein the modified nano tourmaline powder is composed of nano tourmaline powder (2000 mesh) and sodium borate, and the weight ratio of nano tourmaline powder to sodium borate is 1:1.

[0051] The above components were mixed according to the weight ratio and the order of adding liquid components first and then powder components. The mixture was then stirred at 35°C for 30 minutes in an ultrasonic constant temperature bath to obtain a negative oxygen ion cathode material.

[0052] Example 2

[0053] This embodiment provides a negative oxygen ion cathode material, comprising the following components in parts by weight: 50 parts modified acrylic emulsion, 1.5 parts defoamer, 2 parts N,N-dimethyl-β-hydroxyethyl octadecylamide γ-propyl quaternary ammonium nitrate, 30 parts modified nano tourmaline powder, and 18 parts tert-butyl carbonate; wherein the modified nano tourmaline powder is composed of nano tourmaline powder (2000 mesh) and sodium borate, and the weight ratio of nano tourmaline powder to sodium borate is 3:7.

[0054] The above components were mixed according to the weight ratio and the order of adding liquid components first and then powder components. The mixture was then stirred at 30°C for 40 minutes in an ultrasonic constant temperature bath to obtain a negative oxygen ion cathode material.

[0055] Example 3

[0056] This embodiment provides a negative oxygen ion cathode material, comprising the following components in parts by weight: 50 parts modified acrylic emulsion, 2 parts defoamer, 2 parts N,N-dimethyl-β-hydroxyethyl octadecylamide γ-propyl quaternary ammonium nitrate, 28 parts modified nano tourmaline powder, and 20 parts tert-butyl carbonate; wherein the modified nano tourmaline powder is composed of nano tourmaline powder (2000 mesh) and sodium borate, and the weight ratio of nano tourmaline powder to sodium borate is 4:6.

[0057] The above components were mixed according to the weight ratio and the order of adding liquid components first and then powder components. The mixture was then stirred at 40°C for 20 minutes in an ultrasonic constant temperature bath to obtain the negative oxygen ion cathode material.

[0058] Example 4

[0059] This embodiment provides a method for preparing a passive negative oxygen ion wall covering, the steps of which are as follows:

[0060] 1. Material preparation

[0061] The wall covering coating composition is prepared according to the following weight parts: 100 parts PVC resin, 32 parts DOTP, 5 parts epoxidized soybean oil, 2.5 parts composite calcium-zinc stabilizer, 20 parts stone powder, 30 parts aluminum hydroxide, 5 parts environmentally friendly flame retardant, 14 parts titanium dioxide, and 0.3 parts stearic acid; wherein, the composite calcium-zinc stabilizer is composed of calcium-zinc stabilizer and barium-zinc stabilizer, and the mass ratio of calcium-zinc stabilizer to barium-zinc stabilizer is 1:1.

[0062] 2. Preparation of semi-finished printed and embossed wall coverings

[0063] The components of the wall covering coating composition are added to the high-temperature mixing equipment according to the weight parts, and the mixture is kept at 45°C and stirred for 5 minutes. When adding the materials, the PVC resin is added first, followed by the liquid components. After premixing for 2 minutes, the other powder components are added and kept at the temperature for 3 minutes to obtain the mixture.

[0064] The above mixture is fed into a mixing chamber at a temperature of 135°C and mixed for 8 minutes. After mixing, the mixture is fed into a two-roll extruder and mixed for another 4 minutes. After mixing, the material is quantitatively fed into a four-roll laminator for lamination. The resulting film (i.e., PVC film) is then hot-pressed onto a cross-woven fabric at a temperature of 170°C. After cooling by a cooling roller, the semi-finished wall covering is printed and embossed using a gravure printing machine with different patterns. The printing temperature is controlled at 100°C for each printing plate, and the embossing temperature is controlled at 200°C, resulting in a printed and embossed semi-finished wall covering.

[0065] 3. Preparation of passive negative oxygen ion wall covering

[0066] 20 parts of the negative oxygen ion cathode material prepared in Example 1 were mixed with 80 parts of water-based acrylic printing medium and stirred at 1200 r / min for 10 min to obtain a negative oxygen ion cathode composite slurry.

[0067] The aforementioned negative ion cathode composite paste was uniformly coated onto the front side of the aforementioned wallcovering printing embossing semi-finished product using an extrusion filter on a printing press using upper and lower silicone rollers, both with a hardness of 72. The coating amount was 20 g / m². 2 Subsequently, based on the depth of the wall covering texture, the machine speed was set to 20 meters per minute, the temperature to 130℃, and the wall covering was dried at 110℃ for 20 seconds. After cooling and trimming, the wall covering was sorted into 30-meter rolls according to standards to produce passive negative ion wall coverings.

[0068] Example 5

[0069] This embodiment provides a method for preparing a passive negative oxygen ion wall covering, the steps of which are as follows:

[0070] 1. Material preparation

[0071] The wall covering coating composition is prepared according to the following weight parts: 100 parts PVC resin, 30 parts DOTP, 4 parts epoxidized soybean oil, 2 parts composite calcium-zinc stabilizer, 20 parts stone powder, 28 parts aluminum hydroxide, 5 parts environmentally friendly flame retardant, 14 parts titanium dioxide, and 0.2 parts stearic acid; wherein, the composite calcium-zinc stabilizer is composed of calcium-zinc stabilizer and barium-zinc stabilizer, and the mass ratio of calcium-zinc stabilizer to barium-zinc stabilizer is 1:2.

[0072] 2. Preparation of semi-finished printed and embossed wall coverings

[0073] The components of the wall covering coating composition are added to the high-temperature mixing equipment according to the weight parts, and the mixture is kept at 45°C and stirred for 5 minutes. When adding the materials, the PVC resin is added first, followed by the liquid components. After premixing for 2 minutes, the other powder components are added and kept at the temperature for 3 minutes to obtain the mixture.

[0074] The above mixture is fed into a mixing chamber at a temperature of 135°C and mixed for 8 minutes. After mixing, the mixture is fed into a two-roll extruder and mixed for another 4 minutes. After mixing, the material is quantitatively fed into a four-roll laminator for lamination. The laminator is then hot-pressed onto a cross-woven fabric at a lamination temperature of 175°C. After cooling by a cooling roller, the semi-finished wallcovering is printed and embossed using a gravure printing machine with different patterns. The printing temperature is controlled at 100°C for each printing plate, and the embossing temperature is controlled at 200°C, resulting in a printed and embossed semi-finished wallcovering.

[0075] 3. Preparation of passive negative oxygen ion wall covering

[0076] 15 parts of the negative oxygen ion cathode material prepared in Example 2 were mixed with 85 parts of water-based acrylic printing medium and stirred at 1200 r / min for 10 min to obtain a negative oxygen ion cathode composite slurry.

[0077] The aforementioned negative ion cathode composite paste was uniformly coated onto the surface of the aforementioned wallcovering printing and embossing semi-finished product using an extrusion filter method on a printing press using upper and lower silicone rollers, both with a hardness of 72. The coating amount was 20 g / m². 2 Subsequently, based on the depth of the wall covering texture, the machine speed was set to 25 meters per minute, the temperature to 140℃, and the wall covering was dried at 100℃ for 25 seconds. After cooling and trimming, the wall covering was sorted into 30-meter rolls according to standards to produce passive negative ion wall coverings.

[0078] Example 6

[0079] This embodiment provides a method for preparing a passive negative oxygen ion wall covering, the steps of which are as follows:

[0080] 1. Material preparation

[0081] The wall covering coating composition is prepared according to the following weight parts: 100 parts PVC resin, 30 parts DOTP, 4 parts epoxidized soybean oil, 3 parts composite calcium-zinc stabilizer, 30 parts stone powder, 30 parts aluminum hydroxide, 5 parts environmentally friendly flame retardant, 14 parts titanium dioxide, and 0.2 parts stearic acid; wherein, the composite calcium-zinc stabilizer is composed of calcium-zinc stabilizer and barium-zinc stabilizer, and the mass ratio of calcium-zinc stabilizer to barium-zinc stabilizer is 1:1.5.

[0082] 2. Preparation of semi-finished printed and embossed wall coverings

[0083] The components of the wall covering coating composition are added to the high-temperature mixing equipment according to the weight parts, and the mixture is kept at 45°C and stirred for 5 minutes. When adding the materials, the PVC resin is added first, followed by the liquid components. After premixing for 2 minutes, the other powder components are added and kept at the temperature for 3 minutes to obtain the mixture.

[0084] The above mixture is fed into a mixing chamber at 135°C and mixed for 8 minutes. After mixing, the mixture is fed into a two-roll extruder and mixed for another 4 minutes. After mixing, the material is quantitatively fed into a four-roll laminator for lamination. The laminator is then hot-pressed onto a cross-woven fabric at a lamination temperature of 180°C. After cooling by a cooling roller, the semi-finished wallcovering is printed and embossed using a gravure printing machine with different patterns. The printing temperature is controlled at 120°C for each printing plate, and the embossing temperature is controlled at 205°C, resulting in a printed and embossed semi-finished wallcovering.

[0085] 3. Preparation of passive negative oxygen ion wall covering

[0086] Ten parts of the negative oxygen ion cathode material prepared in Example 3 were mixed with 90 parts of water-based acrylic printing medium and stirred at 1200 r / min for 10 min to obtain a negative oxygen ion cathode composite slurry.

[0087] The aforementioned negative ion cathode composite paste was uniformly coated onto the surface of the aforementioned wallcovering printing and embossing semi-finished product using an extrusion filter method on a printing press using upper and lower silicone rollers, both with a hardness of 72. The coating amount was 20 g / m². 2 Subsequently, based on the depth of the wall covering texture, the machine speed was set to 20 meters per minute, the temperature to 150℃, and the wall covering was dried at 120℃ for 20 seconds. After cooling and trimming, the wall covering was sorted into 30-meter rolls according to standards to produce passive negative ion wall coverings.

[0088] Compare with Example 1

[0089] Except for the different composition of the negative oxygen ion cathode material, the rest is the same as in Example 4.

[0090] The negative ion cathode material of this comparative example comprises the following components in parts by weight: 50 parts modified acrylic emulsion, 1 part defoamer, 2 parts N,N-dimethyl-β-hydroxyethyl octadecylamide γ-propyl quaternary ammonium nitrate, 15 parts nano tourmaline powder (2000 mesh), and 17 parts tert-butyl carbonate.

[0091] Compare with Example 2

[0092] Except for the different composition of the negative oxygen ion cathode material, the rest is the same as in Example 4.

[0093] The negative ion cathode material of this comparative example comprises the following components in parts by weight: 50 parts modified acrylic emulsion, 1 part defoamer, 30 parts modified nano tourmaline powder, and 19 parts ethylene tert-carbonate; wherein the modified nano tourmaline powder is composed of nano tourmaline powder (2000 mesh) and sodium borate, and the weight ratio of nano tourmaline powder to sodium borate is 1:1.

[0094] Compare with Example 3

[0095] Except for the different composition of the negative oxygen ion cathode material, the rest is the same as in Example 4.

[0096] The negative ion cathode material of this comparative example comprises the following components in parts by weight: 67 parts modified acrylic emulsion, 1 part defoamer, 2 parts N,N-dimethyl-β-hydroxyethyl octadecylamide γ-propyl quaternary ammonium nitrate, and 30 parts modified nano tourmaline powder; wherein the modified nano tourmaline powder is composed of nano tourmaline powder (2000 mesh) and sodium borate, and the weight ratio of nano tourmaline powder to sodium borate is 1:1.

[0097] Compare with Example 4

[0098] Except for replacing N,N-dimethyl-β-hydroxyethyloctadecylamide γ-propyl quaternary ammonium nitrate in Example 4 with anionic polyacrylamide (APAM), the rest is the same as in Example 4.

[0099] Compare with Example 5

[0100] Except for replacing the negative oxygen ion cathode material in Example 4 with a negative oxygen ion material, the rest is basically the same as in Example 4, and a negative oxygen ion wall cloth is obtained.

[0101] The composition of the negative oxygen ion material in this comparative example is as follows: 20 parts of negative oxygen ion material (mineral powder produced in Lingshou County, obtained through normal market purchase) are mixed with 80 parts of water-based acrylic printing media and stirred at 1200 r / min for 10 min to obtain negative oxygen ion slurry.

[0102] Experimental Example 1

[0103] The negative ion performance of the negative ion wall coverings of Examples 4-6 and Comparative Examples 1-5 was tested using the following method:

[0104] Negative ion concentration: The material-induced air ion concentration was measured using a method that measures the amount of air ions generated.

[0105] Negative ion dispersal distance: A 1-square-meter negative oxygen ion wall covering was installed, and the negative oxygen ion concentration was measured at different distances within a sealed room. The average concentration reached 500 ions / cm². 3 The positions mentioned above represent the distance at which negative oxygen ions are released.

[0106] The results are shown in Table 1.

[0107] Table 1. Quality test results of various negative ion wall coverings

[0108]

[0109]

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A negative oxygen ion cathode composite material, characterized in that, The product comprises the following components in parts by weight: 45-55 parts modified acrylic emulsion, 0.5-2 parts defoamer, 1.5-2.5 parts N,N-dimethyl-β-hydroxyethyl octadecylamide γ-propyl quaternary ammonium nitrate, 25-35 parts modified nano tourmaline powder, and 15-25 parts ethylene tert-carbonate. The modified nano tourmaline powder is composed of nano tourmaline powder and borates, and the weight ratio of nano tourmaline powder to borates is (3-5):(5-7).

2. The method for preparing the negative oxygen ion cathode composite material according to claim 1, characterized in that, include: The components are mixed according to their weight proportions and then stirred evenly under ultrasonic conditions.

3. The preparation method according to claim 2, characterized in that, The stirring temperature is 30-40 ℃, and the stirring time is 20-40 min.

4. A negative oxygen ion cathode composite slurry, characterized in that, It comprises the following components in parts by weight: 10-20 parts of the negative oxygen ion cathode composite material as described in claim 1 and 80-90 parts of the printing medium.

5. The negative oxygen ion cathode composite slurry according to claim 4, characterized in that, The printing medium is a water-based acrylic printing medium.

6. The method for preparing the negative oxygen ion cathode composite slurry according to claim 4, characterized in that, include: Mix the components according to their weight proportions and stir until homogeneous.

7. The preparation method according to claim 6, characterized in that, The stirring speed is 1100-1300 r / min, and the stirring time is 5-15 min.

8. The application of the negative oxygen ion cathode composite material of claim 1 or the negative oxygen ion cathode composite slurry of claim 4 in the preparation of passive negative oxygen ion wall coverings.

9. A method for preparing a passive negative ion wall covering, characterized in that, Includes the following steps: S1: The negative oxygen ion cathode composite slurry described in claim 4 is uniformly coated onto the surface of the wall fabric; S2: The coated wall fabric is dried and cooled to obtain a passive negative oxygen ion wall fabric.

10. The preparation method according to claim 9, characterized in that, The method for preparing wall coverings includes: preparing a PVC film using a wall covering coating composition, hot-laminating the prepared PVC film onto a base fabric while it is still hot, and cooling it with a cooling roller to obtain the wall covering.

11. The preparation method according to claim 10, characterized in that, The wall covering coating composition comprises the following components in parts by weight: 100 parts PVC resin, 30-35 parts DOTP, 4-6 parts epoxidized soybean oil, 2-3 parts composite calcium-zinc stabilizer, 18-30 parts stone powder, 28-32 parts aluminum hydroxide, 4-6 parts environmentally friendly flame retardant, 13-15 parts titanium dioxide, and 0.2-0.4 parts stearic acid.

12. A passive negative oxygen ion wall covering, characterized in that, Prepared according to the preparation method according to any one of claims 9-11.

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