CN111087186A - Nano tourmaline powder loaded diatomite and diatom ooze and preparation method thereof - Google Patents
Nano tourmaline powder loaded diatomite and diatom ooze and preparation method thereof Download PDFInfo
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Abstract
The invention relates to the technical field of diatomite, in particular to a preparation method of diatomite loaded with nano tourmaline powder, which comprises the following steps: dispersing tourmaline powder in n-butanol, grinding with wet superfine grinding machine, adding water and diatomaceous earth, stirring, azeotropic distilling, adding ethanol, stirring, and ultrasonic dispersing until ethanol volatilizes completely. The invention solves the problem that tourmaline powder is easy to agglomerate to influence tourmaline to release negative ions in the prior art, and the dispersed nano tourmaline is directly deposited in diatomite micropores by an azeotropic distillation method, thereby solving the agglomeration problem of superfine tourmaline powder in the loading process and improving the performance of tourmaline to release negative ions.
Description
Technical Field
The invention relates to the technical field of diatomite and diatom ooze and preparation methods thereof, in particular to diatomite and diatom ooze loaded with nano tourmaline powder and a preparation method thereof.
Background
Negative ions are an important air conditioner and are known as "air vitamins and growth factors". Generally speaking, the main sources of negative ions in air in nature, which can be generated naturally or artificially, are cosmic rays, sunlight ultraviolet rays, and rays emitted from radioactive elements in rock soil, as well as lightning shock excitation, storm, waterfall, and sea wave impact friction, etc., so that outer layer electrons of gas molecules in the atmosphere escape from atoms without the constraint of atomic nuclei, become positive ions, and the escaped free electrons have extremely short free paths and quickly attach to certain gas molecules or atoms (especially easily attach to oxygen or water molecules) to become air negative ions. The artificial negative ions mainly ionize air by methods such as a high-voltage electrostatic field, a high-frequency electric field, ultraviolet rays, radioactive rays and impact of water, and the like, so that negative ions are generated. Currently, most of the above methods are used to generate negative ions, and then the negative ions are blown to a desired place by means of a blower and other means.
The tourmaline powder has the functions of generating negative ions and far infrared emissivity, and is a borosilicate mineral, namely an aluminum, iron, sodium, magnesium and lithium silicate mineral with a ring structure which is characterized by containing boron; the tourmaline crystal is in a column shape close to a triangle, the crystal forms at two ends are different, the column surface has longitudinal lines, the tourmaline crystal is in a column shape, a needle shape, a radial shape and a block-shaped aggregate, the glass is glossy, and the fracture is in turpentine gloss and is semitransparent to transparent. Because it is a polar crystal with special structure, it can produce electric ion for a long time and release air negative ion and far infrared ray permanently, and the tourmaline powder after processing and purification has higher negative ion production and far infrared emissivity.
Tourmaline powder is obtained by mechanically pulverizing raw tourmaline ore after removing impurities. The chemical general formula of the tourmaline powder is NaR3Al6[Si6O18][BO3]3(OH,F)4. Contains [ BO ] in the component3]3-As well as a feature thereof. Wherein R represents a metal cation, when R is Mg2+、Fe2+Or (Li)++Al3+) And then, three end-member mineral species of the magnesium tourmaline powder, the black tourmaline powder and the lithium tourmaline powder are respectively formed. The isomorphism substitution among the end members is extensive, except for Na+Can be coated with Ca2+In addition, a complete similar image series is formed between the magnesium tourmaline powder and the black tourmaline powder, a complete similar image series is formed between the black tourmaline powder and the lithium tourmaline powder, and an incomplete series is formed between the magnesium tourmaline powder and the lithium tourmaline powder.
The tourmaline crystal is columnar, the crystal forms at two ends are different, longitudinal lines often appear on the columnar surface, and the cross section is arc triangle; the aggregate is rod-shaped, radial or compact block-shaped; the color varies with the cationic component; the black tourmaline powder rich in iron is black, the black tourmaline powder rich in lithium, manganese and cesium is rose or dark blue, the black tourmaline powder rich in magnesium is brown, yellow and chromium is dark green; in addition, tourmaline powder often forms color bands of different colors along the cross section of the column or vertical column. Tourmaline powder is rich in volatile components of boron and water, and the cause of the tourmaline powder is related to the action of gas, and is generally produced in granite pegmatite. Tourmaline powder can also be used as metamorphic mineral and is produced in tourmaline powder metamorphic rocks. Tourmaline powder is also found in magicychiate. The tourmaline powder has piezoelectricity and can be used as a component of a pressure measuring instrument.
In many application fields, tourmaline often appears in the form of powder. Practice proves that the powder is fine, the specific surface area is large, and the piezoelectric property and the pyroelectric property of the powder exert better effects. However, since the tourmaline has a compact structure and a high hardness (up to 7.0 to 7.5 degrees), the grinding process is difficult, the particle size distribution range is wide, and the thickness of the particles is uneven, which affects other related properties of the subsequent processed product, and affects the application thereof.
In the prior art, in order to improve the indoor air environment and improve the concentration of indoor beneficial negative ions, ores generated by natural negative ions such as tourmaline and the like are greatly concerned, and the application of the ores is quite wide. The tourmaline is matched with environment-friendly building material diatom ooze for use, and has important significance for improving indoor air environment. However, most of the existing products are functional products capable of releasing negative ions obtained by simply mixing tourmaline powder and diatom ooze, and because the particle size of the tourmaline powder is usually micron-sized, the tourmaline can not embody the excellent performance of the tourmaline at the size.
Chinese patent (CN 107032733A) discloses a diatom ooze releasing negative ions and a preparation method thereof, and the diatom ooze mainly comprises the following raw materials: the invention relates to a diatom ooze anion releasing material, which comprises diatomite, composite tourmaline powder, rare earth oxide, titanium dioxide, a cementing material, re-dispersible latex powder and cellulose. However, the composite tourmaline powder is in submicron level, although the capability of releasing negative ions and far infrared rays can be improved, the size and the performance of the composite tourmaline powder are different from those of nano-scale ultrafine tourmaline, and the composite tourmaline powder is easy to agglomerate to influence the effect of the tourmaline on releasing negative ions.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention aims to provide a diatomite and diatom ooze loaded with nano tourmaline powder and a preparation method thereof, which are used for solving the problem that tourmaline powder is easy to agglomerate and thus the tourmaline powder releases negative ions in the prior art. The invention directly deposits the dispersed nano tourmaline in the diatomite micropores by an azeotropic distillation method, solves the agglomeration problem of the superfine tourmaline powder in the loading process and improves the performance of the tourmaline for releasing negative ions.
In order to attain the above and other related objects,
the invention provides a preparation method of nano tourmaline powder loaded diatomite, which comprises the following steps:
dispersing tourmaline powder in n-butyl alcohol, and grinding for 2-3 h by a wet-process superfine grinding machine to obtain a nano tourmaline suspension;
step two, adding water into the nano tourmaline powder suspension liquid obtained in the step one, uniformly stirring, adding diatomite, and continuously stirring, wherein the weight part ratio of the diatomite to the tourmaline powder is (40-50): (1-2), carrying out azeotropic distillation to obtain diatomite pre-loaded with nano tourmaline for later use;
and step three, adding ethanol into the diatomite pre-loaded with the nano tourmaline powder, uniformly stirring, heating to 50-60 ℃, and performing ultrasonic dispersion until the ethanol is completely volatilized to obtain the diatomite loaded with the nano tourmaline powder.
Tourmaline powder is a polar crystal with a special structure, can generate electric ions for a long time and permanently release air negative ions and far infrared rays, and the processed and purified tourmaline powder has higher negative ion generation amount and far infrared emissivity.
N-butyl alcohol is used as a dispersion medium of tourmaline powder, a nano tourmaline suspension is obtained through wet superfine grinding, water is added into the suspension, the dispersed tourmaline powder is directly deposited in the micropores of the diatomite through an azeotropic distillation method, and then the ethanol is added for ultrasonic dispersion until the ethanol is volatilized, so that the diatomite loaded with the nano tourmaline powder is obtained. The dispersed nano tourmaline powder is directly deposited in the diatomite micropores by an azeotropic distillation method, so that agglomeration of the tourmaline powder can be effectively prevented. The nano tourmaline powder has larger specific surface area, so that more air negative ions and far infrared rays can be released, the utilization rate of the tourmaline is improved, and the nano tourmaline powder has important significance for adjusting indoor air environment.
Further, the tourmaline powder, n-butyl alcohol, water, diatomite and ethanol are mixed according to the following weight ratio of (1-2): (35-40): (60-65): (40-50): (80-120).
Further, the particle size of the ground tourmaline powder in the step one is less than or equal to 100 nm. The tourmaline powder has the functions of generating negative ions and far infrared emissivity, is a polar crystal with a special structure, can generate electric ions for a long time and permanently release air negative ions and far infrared rays, and has higher negative ion generation amount and far infrared emissivity after being processed and purified. The particle size of the ground tourmaline powder is less than or equal to 100nm, and the powder has stronger capability of releasing negative air ions.
Further, the azeotropic distillation in the second step comprises the following specific processes: heating the suspension to 93-96 ℃, distilling at constant temperature for 1-2 h, and continuously heating to 117-120 ℃ for distilling for 0.5-1 h.
The dispersed nano tourmaline powder is directly deposited in the diatomite micropores by an azeotropic distillation method, so that agglomeration of the tourmaline powder can be effectively prevented. In the azeotropic distillation process, the constant-temperature distillation is carried out under the boiling point of the n-butyl alcohol, so that the n-butyl alcohol can be prevented from volatilizing too quickly, and the nano tourmaline powder is better deposited in the micropores of the diatomite. And when the deposition process is about to finish, heating to about the boiling point of the n-butyl alcohol, and dispersing the n-butyl alcohol remained in the diatomite, so that the content of the n-butyl alcohol in the deposited diatomite is reduced.
Furthermore, the temperature of ultrasonic dispersion in the third step is 50-60 ℃, and the ultrasonic power is 25-30 kHz.
The ethanol is subjected to ultrasonic dispersion, so that the uniformity of the nano tourmaline powder in the micropores of the diatomite can be improved.
In a second aspect of the invention, a nano tourmaline powder-loaded diatomite is provided, and the nano tourmaline powder-loaded diatomite is prepared by the preparation method.
The dispersed nano tourmaline powder is directly deposited in the diatomite micropores by the azeotropic distillation method, so that agglomeration of the tourmaline powder can be effectively prevented. The nano tourmaline powder has larger specific surface area, so that more air negative ions and far infrared rays can be released, the utilization rate of the tourmaline is improved, and the nano tourmaline powder has important significance for adjusting indoor air environment.
The invention provides a diatom ooze loaded with nano tourmaline powder, which comprises the following components in parts by weight: 25-40 parts of nano tourmaline powder-loaded diatomite, 2-3 parts of rare earth oxide, 3-5 parts of titanium dioxide, 10-15 parts of a cementing material, 3-5 parts of redispersible latex powder, 0.5-2 parts of cellulose and 0.2-0.5 part of a mildew inhibitor; the nano tourmaline powder loaded diatomite is prepared by the preparation method.
The dispersed nano tourmaline is directly deposited in the diatomite micropores by an azeotropic distillation method, so that the agglomeration problem of the superfine tourmaline powder in the loading process is solved, and the performance of releasing negative ions by the tourmaline is improved. The nanometer tourmaline has larger specific surface area, so that more air negative ions and far infrared rays can be released, the utilization rate of the tourmaline is improved, the purification efficiency and the purification durability of the diatom ooze are obviously improved, no secondary pollution is caused, and the defects of saturated adsorption and non-durable performance of the traditional diatom ooze coating are effectively overcome.
Further, the diatom ooze loaded with the nano tourmaline powder comprises the following components in parts by weight: 32-35 parts of nano tourmaline powder-loaded diatomite, 2-3 parts of rare earth oxide, 3-4 parts of titanium dioxide, 12-15 parts of a cementing material, 3-5 parts of redispersible latex powder, 0.8-1.2 parts of cellulose and 0.2-0.5 part of a mildew inhibitor.
Further, the rare earth oxide is at least one of cerium oxide, lanthanum oxide, yttrium oxide and europium oxide; the titanium dioxide is anatase titanium dioxide; the cementing material is at least one of white cement, sierozem powder, gypsum powder and water glass; the redispersible latex powder is styrene/acrylate copolymer powder; the length of the cellulose is 1-3 mm; the mildew preventive is ammonium persulfate or calcium phosphate.
Has the advantages that: n-butyl alcohol is used as a dispersion medium of tourmaline powder, a nano tourmaline suspension is obtained through wet superfine grinding, water is added into the suspension, the dispersed tourmaline powder is directly deposited in the micropores of the diatomite through an azeotropic distillation method, and then the ethanol is added for ultrasonic dispersion until the ethanol is volatilized, so that the diatomite loaded with the nano tourmaline powder is obtained. The dispersed nano tourmaline powder is directly deposited in the diatomite micropores by an azeotropic distillation method, so that agglomeration of the tourmaline powder can be effectively prevented. The nanoscale tourmaline powder has larger specific surface area, so that the nanoscale tourmaline powder can release more air negative ions and far infrared rays, the utilization rate of tourmaline is improved, and the tourmaline has important significance for adjusting indoor air environment, so that the purification efficiency and the purification durability of diatom ooze are remarkably improved, secondary pollution is avoided, and the defects of saturated adsorption and non-durable performance of the traditional diatom ooze coating are effectively overcome.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but it should not be construed that the scope of the present invention is limited to the following examples. Various substitutions and alterations can be made by those skilled in the art and by conventional means without departing from the spirit of the method of the invention described above.
Example 1
A preparation method of nano tourmaline powder loaded diatomite comprises the following steps:
dispersing tourmaline powder in n-butyl alcohol, and grinding for 2h by a wet superfine grinding machine, wherein the particle size of the ground tourmaline powder is less than or equal to 100nm to obtain a nano tourmaline suspension;
step two, adding water into the nano tourmaline powder suspension liquid obtained in the step one, uniformly stirring, adding diatomite, continuously stirring, and performing azeotropic distillation (heating the suspension liquid to 93 ℃, distilling at constant temperature for 2 hours, and continuously heating to 117 ℃ for distilling for 1 hour) to obtain diatomite pre-loaded with nano tourmaline for later use;
step three, adding ethanol into the diatomite pre-loaded with the nano tourmaline, uniformly stirring, performing ultrasonic dispersion until the ethanol is completely volatilized, wherein the temperature is 50 ℃, the ultrasonic power is 30kHz, and the weight ratio of the tourmaline powder, the n-butyl alcohol, the water, the diatomite and the ethanol is 1: 35: 60: 40: 100, obtaining the diatomite loaded with the nano tourmaline powder.
The nanometer tourmaline powder-loaded diatom ooze comprises the following components in parts by weight: 25 parts of nano tourmaline powder-loaded diatomite, 2 parts of rare earth oxide (cerium oxide), 3 parts of titanium dioxide (anatase titanium dioxide), 10 parts of a cementing material (white cement), 3 parts of redispersible latex powder (styrene/acrylate copolymerized rubber powder), 0.5 part of cellulose (cellulose with the length of 1-3 mm) and 0.2 part of a mildew preventive (ammonium persulfate); the nano tourmaline powder loaded diatomite is prepared by the preparation method.
Example 2
A preparation method of nano tourmaline powder loaded diatomite comprises the following steps:
dispersing tourmaline powder in n-butyl alcohol, and grinding for 3h by a wet-process superfine grinding machine, wherein the particle size of the ground tourmaline powder is less than or equal to 100nm to obtain a nano tourmaline suspension;
step two, adding water into the nano tourmaline powder suspension liquid obtained in the step one, uniformly stirring, adding diatomite, continuously stirring, and carrying out azeotropic distillation (heating the suspension liquid to 96 ℃, distilling at constant temperature for 1h, and continuously heating to 120 ℃ for distilling for 0.5 h) to obtain diatomite pre-loaded with nano tourmaline for later use;
step three, adding ethanol into the diatomite pre-loaded with the nano tourmaline, uniformly stirring, and performing ultrasonic dispersion until the ethanol is completely volatilized, wherein the temperature is 60 ℃, the ultrasonic power is 25kHz, and the weight ratio of the tourmaline powder, the n-butyl alcohol, the water, the diatomite and the ethanol is 2: 40: 65: 50: 100, obtaining the diatomite loaded with the nano tourmaline powder.
The nanometer tourmaline powder-loaded diatom ooze comprises the following components in parts by weight: 40 parts of nano tourmaline powder-loaded diatomite, 3 parts of rare earth oxide (lanthanum oxide), 5 parts of titanium dioxide (anatase titanium dioxide), 15 parts of a cementing material (gypsum powder), 5 parts of redispersible latex powder (styrene/acrylate copolymerized rubber powder), 2 parts of cellulose (cellulose with the length of 1-3 mm) and 0.5 part of a mildew preventive (calcium phosphate); the nano tourmaline powder loaded diatomite is prepared by the preparation method.
Example 3
A preparation method of nano tourmaline powder loaded diatomite comprises the following steps:
dispersing tourmaline powder in n-butyl alcohol, and grinding for 2h by a wet superfine grinding machine, wherein the particle size of the ground tourmaline powder is less than or equal to 100nm to obtain a nano tourmaline suspension;
step two, adding water into the nano tourmaline powder suspension liquid obtained in the step one, uniformly stirring, adding diatomite, continuously stirring, and carrying out azeotropic distillation (heating the suspension liquid to 95 ℃, distilling at constant temperature for 1.5h, and continuously heating to 118 ℃ and distilling for 0.6 h) to obtain diatomite pre-loaded with nano tourmaline for later use;
step three, adding ethanol into the diatomite pre-loaded with the nano tourmaline, uniformly stirring, performing ultrasonic dispersion until the ethanol is completely volatilized, wherein the temperature is 55 ℃, the ultrasonic power is 28kHz, and the weight ratio of the tourmaline powder, the n-butyl alcohol, the water, the diatomite and the ethanol is 2: 38: 62: 45: 100, obtaining the diatomite loaded with the nano tourmaline powder.
The nanometer tourmaline powder-loaded diatom ooze comprises the following components in parts by weight: 32 parts of nano tourmaline powder-loaded diatomite, 2 parts of rare earth oxide (europium oxide), 3 parts of titanium dioxide (anatase titanium dioxide), 12 parts of a cementing material (water glass), 4 parts of redispersible latex powder (styrene/acrylate copolymerized rubber powder), 0.8 part of cellulose (cellulose with the length of 1-3 mm) and 0.2 part of a mildew preventive (ammonium persulfate); the nano tourmaline powder loaded diatomite is prepared by the preparation method.
Example 4
A preparation method of nano tourmaline powder loaded diatomite comprises the following steps:
step one, dispersing tourmaline powder in n-butyl alcohol, grinding for 2.5h by a wet-process superfine grinding machine, and obtaining a nano tourmaline suspension liquid, wherein the particle size of the ground tourmaline powder is less than or equal to 100 nm;
step two, adding water into the nano tourmaline powder suspension liquid obtained in the step one, uniformly stirring, adding diatomite, continuously stirring, and carrying out azeotropic distillation (heating the suspension liquid to 95 ℃, distilling at constant temperature for 1.5h, and continuously heating to 118 ℃ and distilling for 0.6 h) to obtain diatomite pre-loaded with nano tourmaline for later use;
step three, adding ethanol into the diatomite pre-loaded with the nano tourmaline, uniformly stirring, performing ultrasonic dispersion until the ethanol is completely volatilized, wherein the temperature is 55 ℃, the ultrasonic power is 28kHz, and the weight ratio of the tourmaline powder, the n-butyl alcohol, the water, the diatomite and the ethanol is 2: 40: 63: 48: 7, obtaining the diatomite loaded with the nano tourmaline powder.
The nanometer tourmaline powder-loaded diatom ooze comprises the following components in parts by weight: 35 parts of nano tourmaline powder-loaded diatomite, 2 parts of rare earth oxide (europium oxide), 4 parts of titanium dioxide (anatase titanium dioxide), 15 parts of a cementing material (water glass), 4 parts of redispersible latex powder (styrene/acrylate copolymerized rubber powder), 0.8 part of cellulose (cellulose with the length of 1-3 mm) and 0.3 part of a mildew preventive (ammonium persulfate); the nano tourmaline powder loaded diatomite is prepared by the preparation method.
Example 5
A preparation method of nano tourmaline powder loaded diatomite comprises the following steps:
dispersing tourmaline powder in n-butyl alcohol, and grinding for 3h by a wet-process superfine grinding machine, wherein the particle size of the ground tourmaline powder is less than or equal to 100nm to obtain a nano tourmaline suspension;
step two, adding water into the nano tourmaline powder suspension liquid obtained in the step one, uniformly stirring, adding diatomite, continuously stirring, and carrying out azeotropic distillation (heating the suspension liquid to 95 ℃, distilling at constant temperature for 1.5h, and continuously heating to 118 ℃ and distilling for 0.6 h) to obtain diatomite pre-loaded with nano tourmaline for later use;
step three, adding ethanol into the diatomite pre-loaded with the nano tourmaline, uniformly stirring, and performing ultrasonic dispersion until the ethanol is completely volatilized, wherein the temperature is 55 ℃, the ultrasonic power is 30kHz, and the weight ratio of the tourmaline powder, the n-butyl alcohol, the water, the diatomite and the ethanol is 2: 38: 62: 46: 110, obtaining the diatomite loaded with the nano tourmaline powder.
The nanometer tourmaline powder-loaded diatom ooze comprises the following components in parts by weight: 34 parts of nano tourmaline powder-loaded diatomite, 2 parts of rare earth oxide (europium oxide), 4 parts of titanium dioxide (anatase titanium dioxide), 14 parts of a cementing material (water glass), 4 parts of redispersible latex powder (styrene/acrylate copolymerized rubber powder), 1 part of cellulose (cellulose with the length of 1-3 mm), and 0.4 part of a mildew preventive (ammonium persulfate); the nano tourmaline powder loaded diatomite is prepared by the preparation method.
Example 6
A preparation method of nano tourmaline powder loaded diatomite comprises the following steps:
dispersing tourmaline powder in n-butyl alcohol, and grinding for 3h by a wet-process superfine grinding machine, wherein the particle size of the ground tourmaline powder is less than or equal to 100nm to obtain a nano tourmaline suspension;
step two, adding water into the nano tourmaline powder suspension liquid obtained in the step one, uniformly stirring, adding diatomite, continuously stirring, and carrying out azeotropic distillation (heating the suspension liquid to 95 ℃, distilling at constant temperature for 1.5h, and continuously heating to 118 ℃ and distilling for 0.6 h) to obtain diatomite pre-loaded with nano tourmaline for later use;
step three, adding ethanol into the diatomite pre-loaded with the nano tourmaline, uniformly stirring, performing ultrasonic dispersion until the ethanol is completely volatilized, wherein the temperature is 55 ℃, the ultrasonic power is 28kHz, and the weight ratio of the tourmaline powder, the n-butyl alcohol, the water, the diatomite and the ethanol is 2: 39: 63: 47: 105, obtaining the diatomite loaded with the nano tourmaline powder.
The nanometer tourmaline powder-loaded diatom ooze comprises the following components in parts by weight: 33 parts of nano tourmaline powder-loaded diatomite, 2 parts of rare earth oxide (europium oxide), 4 parts of titanium dioxide (anatase titanium dioxide), 14 parts of a cementing material (water glass), 5 parts of redispersible latex powder (styrene/acrylate copolymerized rubber powder), 1 part of cellulose (cellulose with the length of 1-3 mm), and 0.4 part of a mildew preventive (ammonium persulfate); the nano tourmaline powder loaded diatomite is prepared by the preparation method.
Comparative example 1
A preparation method of nano tourmaline powder loaded diatomite comprises the following steps:
dispersing tourmaline powder in n-butyl alcohol, grinding for 2h by a wet superfine grinding machine, drying to obtain nano tourmaline, wherein the particle size of the ground tourmaline powder is less than or equal to 100 nm;
step two, adding the nano tourmaline powder in the step one into diatomite and continuously stirring to obtain the diatomite pre-loaded with the nano tourmaline for later use;
step three, adding ethanol into the diatomite pre-loaded with the nano tourmaline, uniformly stirring, and performing ultrasonic dispersion until the ethanol is completely volatilized, wherein the temperature is 50 ℃, the ultrasonic power is 30kHz, and the weight ratio of the tourmaline powder, the diatomite and the ethanol is 1: 40: 100, obtaining the diatomite loaded with the nano tourmaline powder.
The nanometer tourmaline powder-loaded diatom ooze comprises the following components in parts by weight: 25 parts of nano tourmaline powder-loaded diatomite, 2 parts of rare earth oxide (cerium oxide), 3 parts of titanium dioxide (anatase titanium dioxide), 10 parts of a cementing material (white cement), 3 parts of redispersible latex powder (styrene/acrylate copolymerized rubber powder), 0.5 part of cellulose (cellulose with the length of 1-3 mm), and 0.2 part of a mildew preventive (ammonium persulfate).
Comparative example 2
A preparation method of nano tourmaline powder loaded diatomite comprises the following steps:
dispersing tourmaline powder in n-butyl alcohol, and grinding for 3h by a wet-process superfine grinding machine, wherein the particle size of the ground tourmaline powder is less than or equal to 100nm to obtain a nano tourmaline suspension;
step two, adding water into the nano tourmaline powder suspension liquid obtained in the step one, uniformly stirring, adding diatomite, continuously stirring, and carrying out azeotropic distillation (heating the suspension liquid to 118 ℃, distilling at constant temperature for 2.1 hours) to obtain diatomite pre-loaded with nano tourmaline for later use;
step three, adding ethanol into the diatomite pre-loaded with the nano tourmaline, uniformly stirring, performing ultrasonic dispersion until the ethanol is completely volatilized, wherein the temperature is 55 ℃, the ultrasonic power is 28kHz, and the weight ratio of the tourmaline powder, the n-butyl alcohol, the water, the diatomite and the ethanol is 2: 39: 63: 47: 100, obtaining the diatomite loaded with the nano tourmaline powder.
The nanometer tourmaline powder-loaded diatom ooze comprises the following components in parts by weight: 33 parts of nano tourmaline powder-loaded diatomite, 2 parts of rare earth oxide (europium oxide), 4 parts of titanium dioxide (anatase titanium dioxide), 14 parts of a cementing material (water glass), 5 parts of redispersible latex powder (styrene/acrylate copolymerized rubber powder), 1 part of cellulose (cellulose with the length of 1-3 mm), and 0.4 part of a mildew preventive (ammonium persulfate); the nano tourmaline powder loaded diatomite is prepared by the preparation method.
Comparative example 3
A preparation method of nano tourmaline powder loaded diatomite comprises the following steps:
dispersing tourmaline powder in n-butyl alcohol, and grinding for 3h by a wet-process superfine grinding machine, wherein the particle size of the ground tourmaline powder is less than or equal to 100nm to obtain a nano tourmaline suspension;
step two, adding water into the nano tourmaline powder suspension obtained in the step one, uniformly stirring, adding diatomite, continuously stirring, and performing azeotropic distillation (heating the suspension to 95 ℃, distilling at a constant temperature for 1.5 hours, and continuously heating to 118 ℃ for distilling for 0.6 hours), wherein the tourmaline powder, the n-butyl alcohol, the water and the diatomite are mixed according to the weight ratio of 2: 39: 63: 47, obtaining the diatomite loaded with the nano tourmaline powder.
The nanometer tourmaline powder-loaded diatom ooze comprises the following components in parts by weight: 33 parts of nano tourmaline powder-loaded diatomite, 2 parts of rare earth oxide (europium oxide), 4 parts of titanium dioxide (anatase titanium dioxide), 14 parts of a cementing material (water glass), 5 parts of redispersible latex powder (styrene/acrylate copolymerized rubber powder), 1 part of cellulose (cellulose with the length of 1-3 mm), and 0.4 part of a mildew preventive (ammonium persulfate); the nano tourmaline powder loaded diatomite is prepared by the preparation method.
The following tests were performed on the diatom ooze loaded with the nano tourmaline powder prepared in examples 1-6 and comparative examples 1-3, and the test results are shown in table 1. Comparative example 1 was not ground with a wet ultra-fine grinder, but ground with a ball mill for drying, and was not subjected to azeotropic distillation, as compared with example 6, and the particle size after grinding in comparative example 1 was 100 μm or less. Comparative example 2 the azeotropic distillation of comparative example 2 does not employ two temperature-rising volatilization events, but one temperature-rising volatilization event, as compared to example 6. Comparative example 3 ultrasonic dispersion was not carried out with ethanol compared to example 6.
And (4) testing standard: JC/T074-2008 'indoor air purification function-coating material purification performance'.
The test method comprises the following steps: setting the inner wall size length, width and height of the experiment cabin to 1250, 800, 1000mm, reserving sampling holes, coating the sample on four glass plates with the thickness of 5mm, drying and putting the glass plates into the experiment cabin. And after 1h, testing the negative ion release amount of the product by using an air ion tester.
Table form
| Test items | The release amount of negative ions at 1h (per cm)3） |
| Example 1 | 4500 |
| Example 2 | 3200 |
| Example 3 | 4800 |
| Example 4 | 5000 |
| Example 5 | 3400 |
| Example 6 | 3600 |
| Comparative example 1 | 1500 |
| Comparative example2 | 1600 |
| Comparative example 3 | 2000 |
As can be seen from table 1, in comparative example 1, compared with example 6, comparative example 1 is not ground by a wet-process ultrafine grinding machine but ground by a ball mill, the particle size of comparative example 1 after grinding is less than or equal to 100 μm, and comparative example 1 adds tourmaline powder by a conventional method, which causes agglomeration and uniform dispersion of tourmaline powder and diatomite, and reduces the release of negative ions of tourmaline powder, thereby reducing the purification efficiency and purification durability of diatom ooze. Comparative example 2 compared to example 6, the azeotropic distillation of comparative example 2 does not employ two temperature-rising volatilization steps, but one temperature-rising volatilization step; the load rate of the nano tourmaline powder is reduced due to one-time temperature rise, so that the distribution amount of the nano tourmaline powder in the diatomite micropores is small, and the purification efficiency and the purification durability of the diatom ooze are reduced. Compared with example 6, the comparative example 3 does not adopt ethanol for ultrasonic dispersion, and the reduction of the nano tourmaline powder loading rate is also influenced to a certain extent, so that the distribution amount of the nano tourmaline powder in the diatomite micropores is less, and the purification efficiency and the purification durability of the diatom ooze are reduced. Embodiments 1 to 6 can effectively solve the agglomeration problem by loading the nano tourmaline powder in the diatomite pores, and at the same time, the ultrafine tourmaline powder has a larger specific surface area so that it can release more negative air ions and far infrared rays, and the utilization rate of the tourmaline is improved, thereby significantly improving the purification efficiency and the purification durability of the diatom ooze.
Claims (8)
1. A preparation method of nano tourmaline powder loaded diatomite is characterized by comprising the following steps:
dispersing tourmaline powder in n-butyl alcohol, and grinding for 2-3 h by a wet-process superfine grinding machine to obtain a nano tourmaline suspension;
step two, adding water into the nano tourmaline powder suspension liquid obtained in the step one, uniformly stirring, adding diatomite, and continuously stirring, wherein the weight part ratio of the diatomite to the tourmaline powder is (40-50): (1-2), carrying out azeotropic distillation to obtain diatomite pre-loaded with nano tourmaline for later use;
and step three, adding ethanol into the diatomite pre-loaded with the nano tourmaline powder, uniformly stirring, heating, and performing ultrasonic dispersion until the ethanol is completely volatilized to obtain the diatomite loaded with the nano tourmaline powder.
2. The preparation method of the nano tourmaline powder-loaded diatomite as claimed in claim 1, wherein the preparation method comprises the following steps: the weight parts of the tourmaline powder, n-butanol, water, diatomite and ethanol are (1-2): (35-40): (60-65): (40-50): (80-120).
3. The preparation method of the nano tourmaline powder-loaded diatomite as claimed in claim 1, wherein the preparation method comprises the following steps: the particle size of the ground tourmaline powder in the step one is less than or equal to 100 nm.
4. The preparation method of the nano tourmaline powder-loaded diatomite as claimed in claim 1, wherein the preparation method comprises the following steps: the azeotropic distillation in the second step comprises the following specific processes: heating the suspension to 93-96 ℃, distilling at constant temperature for 1-2 h, and continuously heating to 117-120 ℃ for distilling for 0.5-1 h.
5. The preparation method of the nano tourmaline powder-loaded diatomite as claimed in claim 1, wherein the preparation method comprises the following steps: the temperature of ultrasonic dispersion in the third step is 50-60 ℃, and the ultrasonic frequency is 25-30 kHz.
6. The nano tourmaline powder loaded diatomite is characterized in that: the nano tourmaline powder-loaded diatomite is prepared by the preparation method of any one of claims 1 to 5.
7. The diatom ooze loaded with the nano tourmaline powder is characterized by comprising the following components in parts by weight: 25-40 parts of nano tourmaline powder-loaded diatomite, 2-3 parts of rare earth oxide, 3-5 parts of titanium dioxide, 10-15 parts of a cementing material, 3-5 parts of redispersible latex powder, 0.5-2 parts of cellulose and 0.2-0.5 part of a mildew inhibitor; the nano tourmaline powder-loaded diatomite is prepared by the preparation method of any one of claims 1 to 5.
8. The nano tourmaline powder-loaded diatom ooze according to claim 7, wherein: the rare earth oxide is at least one of cerium oxide, lanthanum oxide, yttrium oxide and europium oxide; the titanium dioxide is anatase titanium dioxide; the cementing material is at least one of white cement, sierozem powder, gypsum powder and water glass; the redispersible latex powder is styrene/acrylate copolymer powder; the length of the cellulose is 1-3 mm; the mildew preventive is ammonium persulfate or calcium phosphate.
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