Material for removing TVOC gas from coating as well as preparation method and application thereof

A material for removing TVOC gas from paint and its preparation method and application technical field

[0001] The present invention relates to the technical field of paint additives, in particular to a material for removing TVOC gas from paint, and a preparation method and application thereof.

Background technique

[0002] Diatomaceous earth is a kind of siliceous rock. The color of diatomaceous earth is white, off-white, gray and light gray-brown, etc., and has the properties of fineness, looseness, light weight, porous, water absorption and strong permeability. The indoor and outdoor coatings, decoration materials, and diatom mud produced with diatomaceous earth not only do not emit harmful chemicals to the human body, but also have the effect of improving the living environment. First, the indoor humidity can be adjusted automatically. The main component of diatomaceous earth is silicic acid. The indoor and outdoor coatings and wall materials produced with it have the characteristics of ultra-fiber and porous. Its ultra-fine pores are 5000 to 6000 times more than that of charcoal. When the indoor humidity rises, the ultra-fine holes on the diatomaceous earth wall material can automatically absorb the moisture in the air and store it. If the moisture in the indoor air decreases and the humidity drops, the diatomaceous earth wall material can release the moisture stored in the ultra-fine pores. Secondly, the diatomite wall material also has the function of eliminating odors and keeping the room clean. Research and experimental results show that diatomaceous earth can act as a deodorant. If titanium oxide is added to diatomite to make composite materials, it can eliminate odors and absorb and decompose harmful chemicals for a long time, and can keep indoor walls clean for a long time. Even if there are smokers in the home, the walls will not turn yellow.

[0003] The controllable synthesis of nanomaterials is an important research content in modern materials science. The selection and amount of surfactants can reduce the aggregation degree of particles in the dispersion system and keep the dispersion system relatively stable. It has a very important effect. Nanomaterials have a very large specific surface area. The number of surface atoms, surface energy and surface tension increase sharply with the decrease of particle size. Small size effects, surface effects, quantum size effects, and macroscopic quantum tunneling effects, etc. Nanoparticles are different from conventional particles in terms of heat, magnetism, light, sensitivity and surface stability.

[0004] Formaldehyde, toluene and some TVOC gases seriously endanger human health. They rank second on the priority control list of toxic chemicals in my country, and are identified as carcinogens by the World Health Organization and the International Agency for Research on Cancer. The problem of indoor formaldehyde pollution has aroused great concern from all walks of life. Studies have shown that short-term exposure to formaldehyde can irritate the eyes, nasal cavity and respiratory tract and cause allergic reactions. Long-term exposure to low-dose formaldehyde can easily increase the possibility of nasopharyngeal cancer, leukemia and death. The Indoor Air Quality Standard (GB/T 18883-2002) promulgated by China stipulates the hygienic standard for formaldehyde in indoor air. However, according to surveys, most of the indoor air in most cities in China contain formaldehyde in the indoor air. Formaldehyde is extremely important, and the effectiveness of current coatings to remove TVOC gas needs to be improved.

Summary of the invention

[0005] The present invention provides a material for removing TVOC gas from paint and a preparation method and application thereof. The material for removing TVOC gas can effectively remove formaldehyde, toluene and some TVOC gas.

[0006] The present invention solves its technical problems and adopts the following technical solutions: A material for removing TVOC gas from paint, and the material for removing TVOC gas from paint is made of the following parts by weight of raw materials: 90-100 parts of modified nano Zinc oxide, 4~6 parts of modified diatomaceous earth, 3 parts of tannin, 2~4 parts of nano-titanium dioxide, 0.5~1.5 parts of black tea extract, 240~300 parts of deionized water.

[0007] As a most preferred solution, the material for removing TVOC gas from paint is made of the following parts by weight of raw materials

Ingredients: 95 parts of modified nano zinc oxide, 5 parts of modified diatomaceous earth, 2 parts of tannin, 3 parts of nano titanium dioxide, 1 part of black tea leaf extract, 270 parts of deionized water.

[0008] As a preferred solution, the particle size of the nano-titanium dioxide is 20-50nm.

[0009] As a preferred solution, the method for preparing the modified nano-zinc oxide is: adding 4 to 8 parts of sodium silicate to 24 to 28 parts of water, heating to 60 to 80 ° C, and stirring to uniformly configure silicon Sodium aqueous solution, cooling to 20~30°C, add 8~12 parts of nano zinc oxide to the sodium silicate aqueous solution, ultrasonic treatment for 10~20min, add 0.5~0.8 part of aluminum sulfate, stir well, then add 0.1~0.2 Parts of isopropyl triisostearoyl titanate, 0.1~0.4 parts of isopropanol, heated to 70~80°C, filtered, washed with ethanol for 2~4 times, dried, and ground to 40~60 mesh to obtain The modified nano zinc oxide.

[0010] As a most preferred solution, the preparation method of the modified nano-zinc oxide is: adding 6 parts of sodium silicate to 26 parts of water, heating to 70° C., stirring and uniformly configuring into a sodium silicate aqueous solution, and cooling To 25°C, add 10 parts of nano-zinc oxide to the sodium silicate aqueous solution, sonicate for 15 minutes, add 0.7 parts of aluminum sulfate, stir evenly, then add 0.15 parts of triisostearoyl isopropyl titanate and 0.25 parts of isopropyl titanate Propanol, heated to 75°C, filtered, washed with ethanol 3 times, dried, and ground to 50 mesh to obtain the modified nano zinc oxide.

[0011] As a preferred solution, the method for preparing the modified diatomaceous earth is: pretreating 8 to 12 parts of diatomaceous earth with 20 to 30 parts of sulfuric acid solution, drying after the pretreatment, and then adding to 4~ Treat it in 6 parts of hydrogen peroxide solution for 5~15min, dry, then mix 2 parts of zeolite, 0.5~1.5 parts of fly ash and the treated diatomaceous earth through airflow, and grind to 80~120 mesh to get the product. The modified diatomaceous earth.

[0012] As a most preferred solution, the method for preparing the modified diatomaceous earth is as follows: pretreat 10 parts of diatomaceous earth with 25 parts of sulfuric acid solution, dry after the pretreatment, and then add 5 parts of hydrogen peroxide Treated in the solution for 10 minutes, dried, then 1.5 parts of zeolite, 1 part of fly ash and the treated diatomaceous earth were dispersed and mixed by airflow, and ground to 100 meshes to obtain the modified diatomaceous earth.

[0013] The present invention also provides a method for preparing a material for removing TVOC gas from a coating, comprising the following steps: (1) Combining modified nano zinc oxide, modified diatomaceous earth, tannin, nano titanium dioxide, and deionization Water is added to the ball mill, and dried after the ball milling treatment; (2) The black tea leaf extract is added and stirred evenly to obtain the material for removing TVOC gas from the paint.

[0014] As a preferred solution, the ball milling step, the added material: the weight ratio of the grinding ball is 1:2~3.

[0015] The present invention also provides an application of a material for removing TVOC gas in the preparation of coatings.

[0016] The beneficial effects of the present invention: (1) The material for removing TVOC gas from paint according to the present invention can effectively remove formaldehyde, toluene and some TVOC gas when used in paint; (2) The modification of the present invention Nano-zinc oxide and modified diatomaceous earth can significantly improve the removal rate of formaldehyde, toluene and some TVOC gases from materials that remove TVOC gas. It only needs to add 2.2% to the coating to play an excellent role and has a wide range of applications. prospect.

Detailed ways

[0017] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention. Not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0018] Example 1 A material for removing TVOC gas from paint, and the material for removing TVOC gas from paint consists of the following parts by weight

The raw materials are made: 95 parts of modified nano zinc oxide, 5 parts of modified diatomaceous earth, 2 parts of tannin, 3 parts of nano titanium dioxide, 1 part of black tea leaf extract, and 270 parts of deionized water.

[0019] The particle size of the nano titanium dioxide is 20-50nm.

[0020] The preparation method of the modified nano zinc oxide is: adding 6 parts of sodium silicate to 26 parts of water, heating to 70° C., stirring uniformly to form an aqueous sodium silicate solution, cooling to 25° C., and adding 10 parts of sodium silicate to 26 parts of water. Add one part of nano-zinc oxide to the sodium silicate aqueous solution, sonicate for 15min, add 0.7 part of aluminum sulfate, stir evenly, then add 0.15 part of triisostearoyl isopropyl titanate, 0.25 part of isopropanol, and heat to 75° C. Filter, wash with ethanol 3 times, dry, and grind to 50 mesh to obtain the modified nano zinc oxide.

[0021] The method for preparing the modified diatomaceous earth is: pretreating 10 parts of diatomaceous earth with 25 parts of sulfuric acid solution, drying after the pretreatment, and then adding 5 parts of hydrogen peroxide solution for 10 minutes and drying, Then 1.5 parts of zeolite, 1 part of fly ash and the treated diatomaceous earth are dispersed and mixed by airflow, and ground to 100 meshes to obtain the modified diatomaceous earth.

[0022] The method for preparing a material for removing TVOC gas from a coating is characterized in that it comprises the following steps: (1) Combining modified nano zinc oxide, modified diatomaceous earth, tannin, nano titanium dioxide, and deionization Water is added to the ball mill, the weight ratio of the added material: the ball is 1:2.5, after the ball milling treatment, drying; (2) Add the black tea leaf extract and stir evenly to obtain the coating used to remove TVOC gas s material.

[0023] Example 2 A material for removing TVOC gas from paint, the material for removing TVOC gas from paint is made of the following parts by weight of raw materials: 90 parts of modified nano zinc oxide, 4 parts of modified diatomaceous earth , 1 part of tannin, 2 parts of nano titanium dioxide, 0.5 part of black tea leaf extract, 240 parts of deionized water.

[0024] The particle size of the nano titanium dioxide is 20-50nm.

[0025] The preparation method of the modified nano-zinc oxide is: adding 6 parts of sodium silicate to 26 parts of water, heating to 70° C., stirring uniformly to form an aqueous solution of sodium silicate, cooling to 25° C., and adding 10 parts of sodium silicate to 26 parts of water. Add one part of nano-zinc oxide to the sodium silicate aqueous solution, sonicate for 15min, add 0.7 part of aluminum sulfate, stir evenly, then add 0.15 part of triisostearoyl isopropyl titanate, 0.25 part of isopropanol, and heat to 75° C. Filter, wash with ethanol 3 times, dry, and grind to 50 mesh to obtain the modified nano zinc oxide.

[0026] The preparation method of the modified diatomaceous earth is: pretreating 10 parts of diatomaceous earth with 25 parts of sulfuric acid solution, drying after the pretreatment, and then adding 5 parts of hydrogen peroxide solution for 10 minutes and drying, Then 1.5 parts of zeolite, 1 part of fly ash and the treated diatomaceous earth are dispersed and mixed by airflow, and ground to 100 meshes to obtain the modified diatomaceous earth.

[0027] The method for preparing a material for removing TVOC gas from a coating is characterized by comprising the following steps: (1) Combining modified nano zinc oxide, modified diatomaceous earth, tannin, nano titanium dioxide, and deionization The water is added to the ball mill, the weight ratio of the added material: the ball is 1:2.5, after the ball milling treatment, drying; (2) Add the black tea leaf extract and stir evenly to obtain the coating used to remove TVOC gas s material.

[0028] Example 3 A material for removing TVOC gas from paint, the material for removing TVOC gas from paint is made of the following parts by weight of raw materials: 100 parts of modified nano zinc oxide, 6 parts of modified diatomaceous earth , 3 parts of tannins, 4 parts of nano titanium dioxide, 1.5 parts of black tea leaf extract, 300 parts of deionized water.

[0029] The particle size of the nano titanium dioxide is 20-50nm.

[0030] The preparation method of the modified nano zinc oxide is: adding 6 parts of sodium silicate to 26 parts of water, heating to 70° C., stirring uniformly to form an aqueous solution of sodium silicate, cooling to 25° C., and adding 10 parts of sodium silicate to 26 parts of water. Parts of nano-zinc oxide are added to the sodium silicate aqueous solution, super

Sonication for 15 minutes, add 0.7 parts of aluminum sulfate, stir evenly, then add 0.15 parts of isopropyl triisostearoyl titanate and 0.25 parts of isopropanol, heat to 75°C, filter, and then wash with ethanol 3 times, bake Dry and grind to 50 mesh to obtain the modified nano zinc oxide.

[0031] The preparation method of the modified diatomaceous earth is: pretreating 10 parts of diatomaceous earth with 25 parts of sulfuric acid solution, drying after the pretreatment, and then adding 5 parts of hydrogen peroxide solution for 10 minutes, and drying, Then 1.5 parts of zeolite, 1 part of fly ash and the treated diatomaceous earth are dispersed and mixed by airflow, and ground to 100 meshes to obtain the modified diatomaceous earth.

[0032] The method for preparing a material for removing TVOC gas from a coating is characterized in that it comprises the following steps: (1) Combining modified nano zinc oxide, modified diatomaceous earth, tannin, nano titanium dioxide, and deionization The water is added to the ball mill, the weight ratio of the added material: the ball is 1:2.5, and the ball is milled and dried; (2) Add the black tea leaf extract and stir evenly to obtain the coating used to remove TVOC gas s material.

[0033] Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that Comparative Example 1 does not contain modified nano-zinc oxide, and everything else is the same.

[0034] Comparative Example 2 The difference between Comparative Example 2 and Example 1 lies in that Comparative Example 2 replaces modified nano-zinc oxide with nano-zinc oxide, and everything else is the same.

[0035] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that Comparative Example 3 does not contain modified diatomaceous earth, and everything else is the same.

[0036] Comparative Example 4 The difference between Comparative Example 4 and Example 1 is that in Comparative Example 2, diatomaceous earth is used to replace modified diatomaceous earth, and everything else is the same.

[0037] Comparative Example 5 The difference between Comparative Example 5 and Example 1 is that the preparation method of the modified diatomaceous earth is different, and the others are the same. [0038] The preparation method of the modified diatomaceous earth is: pretreating 10 parts of diatomaceous earth with 25 parts of sulfuric acid solution, drying after the pretreatment, and then adding 5 parts of hydrogen peroxide solution for 10 minutes, and drying, Then, 2.5 parts of perovskite minerals and the treated diatomaceous earth are dispersed and mixed by airflow, and ground to 100 meshes to obtain the modified diatomaceous earth.

[0039] In order to further prove the effect of the present invention, the following test methods are provided: The materials for removing TVOC gas from the paint described in Examples 1 to 3 and Comparative Example 5 are added to the paint to prepare the paint, and the addition amount is 2.2%, weigh 20g each of the paint described in Example 3 and Comparative Examples 1 to 5, and put them into the initial concentration of 60mg/m.³Formaldehyde, 60 mg/m³In the 10L dryer of toluene, after 48 hours, the concentration of formaldehyde and toluene in the gas in the dryer were measured for changes over time. The test was performed three times and the average value was taken. The test results are shown in Table 1.

[0040] Table 1 Test Value

<td></td><td>Formaldehyde concentration/mg/m?</td><td>Toluene concentration/mg/m*</td>

<td>Example 1</td><td>4.5</td><td>5.2</td>

<td>Example 2</td><td>5.1</td><td>5.9</td>

<td>Example 3</td><td>4.9</td><td>5.8</td>

<td>Comparative example 1</td><td>30.2</td><td>33.1</td>

<td>Comparative example 2</td><td>2L5</td><td>twenty two A</td>

<td>Comparative example 3</td><td>28.1</td><td>294</td>

<td>Comparative example 4</td><td>19.8</td><td>20.8</td>

<td>Time scale 5</td><td>20.5</td><td>22.1</td>

It can be seen from Table 1 that the TVOC gas removal material of the present invention has a good effect of removing formaldehyde and toluene in coatings. The removal rate of formaldehyde has reached 92.5%, and the removal rate of toluene has reached 91.3%. Comparing Example 3, it can be seen that different ratios of raw materials can affect the efficiency of removing formaldehyde and toluene. Example 1 is the best ratio and has the highest removal rate; comparing Example 1 and Comparative Example 2, it can be seen that the present invention The described nano zinc oxide can significantly improve the removal rate of formaldehyde and toluene by the material for removing TVOC gas; comparing Example 1 and Comparative Examples 3 to 4, it can be seen that the modified diatomaceous earth described in the present invention can significantly improve the removal of TVOC gas. The removal rate of formaldehyde and toluene of the material; comparing Example 1 and Comparative Example 5, it can be seen that different preparation methods of modified diatomaceous earth can significantly affect the removal rate of formaldehyde and toluene of the material for removing TVOC gas. When the preparation method of algae earth is changed to other methods, the removal rate of formaldehyde and toluene will be significantly reduced. [0041] Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above-mentioned description content, relevant staff can make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the above content, and its technical scope must be determined according to the scope of the claims.