A method for preparing negative oxygen ion powder

Abstract

The present invention provides a method for preparing negative oxygen ion powder. The preparation method obtains tourmaline-based negative oxygen ion powder with high negative ion release by simultaneously adding lithium chloride and tetraethyl orthosilicate into tourmaline powder and modifying the tourmaline powder through heat treatment. The mass percentage content of each component in the powder is: tourmaline powder: 55-86%; lithium chloride: 0.5-1%; tetraethyl orthosilicate: 13-45%, and the calcination temperature is: 300-400°C. The preparation process of the present invention is simple and the price is low. The negative oxygen ion powder of the present invention has excellent performance and high negative oxygen ion release effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of new materials, and specifically relates to a method for preparing negative oxygen ion powder, which can obtain negative oxygen ion powder mainly composed of tourmaline and is applied to the fields of building materials and the like. Background Art

[0002] Negative oxygen ions are air particles with negative charges, which are formed by oxygen molecules, water molecules, etc. in the air gaining electrons. Negative oxygen ions in the air play a very important role in human health. They can not only help eliminate particulate matter, bacteria, viruses, etc. that cause human diseases, but also regulate and improve the body from the inside to restore the body to a healthy state. They are the "health factor" that maintains human life activities and are known as "air vitamins". However, with the development of industry, excessive emissions of harmful substances have caused the concentration of negative oxygen ions in urban air to become lower and lower, seriously affecting human health. The main sources of negative ions in the air are cosmic rays, ultraviolet rays, radiation emitted by radioactive elements in rocks and soil, as well as lightning, storms, waterfalls, and friction caused by waves. In recent years, people have found that many natural minerals can produce negative oxygen ions, such as some inorganic oxide composite powders and some rare earth composite salts. Among various materials that release negative ions, tourmaline has become the main research object due to its special structure and composition. Tourmaline has good piezoelectricity and pyroelectric effect, and can ionize air to generate negative oxygen ions in the air that are beneficial to the human body, so it is an "environmentally friendly material". However, the negative ion release of most tourmaline powders currently sold on the market is relatively low, which cannot meet the requirements of improving the air environment and improving the quality of human settlement. Further modification is needed to improve the negative oxygen ion release performance. Summary of the invention

[0003] The purpose of the present invention is to further improve the performance of tourmaline powder in releasing negative oxygen ions. The present invention modifies the powder starting from the tourmaline component, by adding lithium chloride and ethyl orthosilicate into the tourmaline powder and subjecting it to heat treatment, to obtain tourmaline-based negative oxygen ion powder with high negative ion release.

[0004] To achieve the above object, the present invention provides a method for preparing negative oxygen ion powder, the steps of which are as follows:

[0005] Take each component in proportion, mix tourmaline powder, lithium chloride and tetraethyl orthosilicate in an appropriate amount of water, stir in a 40°C water bath for a certain period of time, dry and calcine at a low temperature of 300-400°C.

[0006] Among them, the negative oxygen ion powder includes the following components in percentage by mass:

[0007] Tourmaline powder: 55~86%; lithium chloride: 0.5~1%; tetraethyl orthosilicate: 13~45%;

[0008] The sum of the above components is 100%.

[0009] The beneficial effects of the present invention are as follows:

[0010] The preparation process of the invention is simple and the price is low. The negative oxygen ion powder of the invention has excellent performance and high negative oxygen ion releasing effect. DETAILED DESCRIPTION

[0011] In order to better understand the present invention, the present invention is further described in detail below in conjunction with specific implementation cases, but the present invention is not limited thereto.

[0012] Example 1

[0013] The contents of each component of negative oxygen ion powder are: tourmaline: 85.8%, LiCl: 1.0%, and tetraethyl orthosilicate: 13.2%.

[0014] Preparation method: Add 85.8% tourmaline powder to an appropriate amount of deionized water, then add 1.0% LiCl and 13.2% ethyl orthosilicate, stir in a 40°C water bath for 3 hours, dry, calcine in a 400°C muffle furnace for 1 hour, and cool to obtain negative oxygen ion powder 1.

[0015] Example 2

[0016] The contents of each component of negative oxygen ion powder are: tourmaline: 75.6%, LiCl: 0.8%, and tetraethyl orthosilicate: 23.6%.

[0017] Preparation method: Add 75.6% tourmaline powder to an appropriate amount of deionized water, then add 0.8% LiCl and 23.6% ethyl orthosilicate, stir in a 40°C water bath for 3 hours, dry, calcine in a 400°C muffle furnace for 1 hour, and cool to obtain negative oxygen ion powder 2.

[0018] Example 3

[0019] The contents of each component of negative oxygen ion powder are: tourmaline: 67.7%, LiCl: 0.7%, and tetraethyl orthosilicate: 31.6%.

[0020] Preparation method: Add 67.7% tourmaline powder to an appropriate amount of deionized water, then add 0.7% LiCl and 31.6% ethyl orthosilicate, stir in a 40°C water bath for 3 hours, dry, calcine in a 400°C muffle furnace for 1 hour, and cool to obtain negative oxygen ion powder 3.

[0021] Example 4

[0022] The contents of each component of negative oxygen ion powder are: tourmaline: 61.3%, LiCl: 0.6%, and tetraethyl orthosilicate: 38.1%.

[0023] Preparation method: Add 61.3% tourmaline powder to an appropriate amount of deionized water, then add 0.6% LiCl and 38.1% ethyl orthosilicate, stir in a 40°C water bath for 3 hours, dry, calcine in a 400°C muffle furnace for 1 hour, and cool to obtain negative oxygen ion powder 4.

[0024] Example 5

[0025] The contents of each component of the negative oxygen ion powder are: tourmaline: 56%, LiCl: 0.5%, and tetraethyl orthosilicate: 43.5%.

[0026] Preparation method: Add 56% tourmaline powder to an appropriate amount of deionized water, then add 0.5% LiCl and 43.5% ethyl orthosilicate, stir in a 40°C water bath for 3 hours, dry, calcine in a 400°C muffle furnace for 1 hour, and cool to obtain negative oxygen ion powder 5.

[0027] Example 6

[0028] The contents of each component of the negative oxygen ion powder are: tourmaline: 61.3%, LiCl: 0.6%, and tetraethyl orthosilicate: 38.1%.

[0029] Preparation method: Add 61.3% tourmaline powder to an appropriate amount of deionized water, then add 0.6% LiCl and 38.1% ethyl orthosilicate, stir in a water bath at 40°C for 3h, 0 C drying to obtain negative oxygen ion powder 6.

[0030] Example 7

[0031] The contents of each component of negative oxygen ion powder are: tourmaline: 61.3%, LiCl: 0.6%, and tetraethyl orthosilicate: 38.1%.

[0032] Preparation method: Add 61.3% tourmaline powder to an appropriate amount of deionized water, then add 0.6% LiCl and 38.1% ethyl orthosilicate, stir in a 40°C water bath for 3 hours, dry, calcine in a muffle furnace at 200°C for 1 hour, and cool to obtain negative oxygen ion powder 7.

[0033] Example 8

[0034] The contents of each component of negative oxygen ion powder are: tourmaline: 61.3%, LiCl: 0.6%, and tetraethyl orthosilicate: 38.1%.

[0035] Preparation method: Add 61.3% tourmaline powder to an appropriate amount of deionized water, then add 0.6% LiCl and 38.1% ethyl orthosilicate, stir in a 40°C water bath for 3 hours, dry, calcine in a muffle furnace at 300°C for 1 hour, and cool to obtain negative oxygen ion powder 8.

[0036] Example 9

[0037] The contents of each component of the negative oxygen ion powder are: tourmaline: 61.3%, LiCl: 0.6%, and tetraethyl orthosilicate: 38.1%.

[0038] Preparation method: Add 61.3% tourmaline powder to an appropriate amount of deionized water, then add 0.6% LiCl and 38.1% ethyl orthosilicate, stir in a 40°C water bath for 3 hours, dry, calcine in a 500°C muffle furnace for 1 hour, and cool to obtain negative oxygen ion powder 9.

[0039] The data on the generation of negative oxygen ions by the negative oxygen ion powder and pure tourmaline powder prepared in Examples 1-5 are shown in Table 1.

[0040] Table 1: Negative oxygen ion release performance of tourmaline powder and different negative ion powders in Examples 1-5

[0041]

[0042] According to the preparation methods of negative oxygen ion powders of Examples 1-5, tourmaline powder was modified with LiCl alone to prepare negative oxygen ion powders as control group 1, control group 2, control group 3 and control group 4. The data of negative oxygen ion generation of negative oxygen ion powders and pure tourmaline powder prepared in control groups 1-4 are shown in Table 2.

[0043] Table 2: Release performance of negative oxygen ions of tourmaline powder and control group 1-4 different negative ion powders

[0044]

[0045] According to the preparation method of negative oxygen ion powder of Examples 1-5, tourmaline powder was modified with ethyl orthosilicate alone to prepare negative oxygen ion powder as control group 5, control group 6, control group 7, control group 8 and control group 9. The data of negative oxygen ion generation of negative oxygen ion powder and pure tourmaline powder prepared in control groups 5-9 are shown in Table 3.

[0046] Table 3: Release performance of negative oxygen ions of tourmaline powder and 5-9 different negative ion powders in the control group

[0047]

[0048] The release capacity of negative oxygen ions of tourmaline powder modified by LiCl and ethyl orthosilicate is greatly improved, and the negative oxygen ion release performance is the best.

[0049] The data of negative oxygen ion generation of Example 4 and Examples 6-9 are shown in Table 4.

[0050] From the data in Table 4, we can see that the tourmaline powder modified by LiCl and ethyl orthosilicate is calcined at 300 0 C and 400 0 C, the ability to release negative oxygen ions is optimal.

[0051] Table 4: Negative oxygen ion release performance of different negative ion powders in Example 4 and Examples 6-9

[0052]

[0053] Control group 10

[0054] The content of each component of negative oxygen ion powder is: tourmaline: 99%, lithium silicate: 1%.

[0055] Preparation method: Add 99% tourmaline powder to an appropriate amount of deionized water, then add 1% lithium silicate, stir in a 40℃ water bath for 3h, 0 C drying to obtain negative oxygen ion powder 10 of the control group.

[0056] Control group 11

[0057] The content of each component of negative oxygen ion powder is: tourmaline: 99%, lithium silicate: 1%.

[0058] Preparation method: Add 99% tourmaline powder to an appropriate amount of deionized water, then add 1% lithium silicate, stir in a 40℃ water bath for 3h, calcine in a 400℃ muffle furnace for 1h, and cool to obtain the negative oxygen ion powder 11 in the control group.

[0059] The data on the generation of negative oxygen ions by the negative oxygen ion powder and pure tourmaline powder prepared in control groups 10 and 11 are shown in Table 5.

[0060] From the data in Table 5, it can be seen that directly replacing LiCl-modified tourmaline powder with lithium silicate has a poor effect in releasing negative oxygen ions.

[0061] Table 5: Release performance of negative oxygen ions of tourmaline powder and control group 10-11 different negative ion powders

[0062]

[0063] In summary, we can see from the data in Table 1-3 that:

[0064] After the tourmaline powder is modified with LiCl and ethyl orthosilicate by the preparation method of Examples 1-5, the negative oxygen ion release amounts of the modified negative oxygen ion powder are 2 times, 2.3 times, 2.6 times, 3 times and 2.5 times that of the pure tourmaline powder, respectively.

[0065] When LiCl was used alone to modify tourmaline powder, the negative oxygen ion release of the modified negative oxygen ion powders of control group 1, control group 2, control group 3 and control group 4 were 1.7 times, 1.9 times, 1.5 times and 1.2 times that of pure tourmaline powder, respectively.

[0066] When the tourmaline powder was modified with ethyl orthosilicate alone, the negative oxygen ion release of the modified negative oxygen ion powders of control group 5, control group 6, control group 7, control group 8 and control group 9 were 1.1 times, 1.3 times, 1.5 times, 1.7 times and 1.5 times that of the pure tourmaline powder, respectively.

[0067] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for preparing negative oxygen ion powder, characterized in that: Tourmaline powder is modified by LiCl and ethyl orthosilicate, and the preparation steps are as follows: A certain amount of tourmaline powder, lithium chloride and tetraethyl orthosilicate are mixed in an appropriate amount of water, stirred in a 40°C water bath for a certain period of time, dried and calcined at 300-400°C to obtain negative oxygen ion powder.

2. The method for preparing negative oxygen ion powder according to claim 1, wherein LiCl and tetraethyl orthosilicate are used to modify tourmaline powder, and the mass percentage content components are: Tourmaline powder: 55-86%; lithium chloride: 0.5-1%; tetraethyl orthosilicate: 13-45%; The sum of the above components is 100%.

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