Multi-effect bamboo charcoal formaldehyde-removing environment-friendly interior wall paint and preparation method thereof

Abstract

The invention discloses multi-effect bamboo charcoal formaldehyde-removing environment-friendly interior wall paint which comprises the following components in parts by weight: 65-80 parts of a natural latex solution, 10-15 parts of modified bamboo charcoal powder, 3-5 parts of an antibacterial agent, 1-3 parts of a dispersing agent, 0.6-1.0 part of a defoaming agent, 1-3 parts of a thickening agent, 2-3 parts of a coalescing agent, 5-10 parts of a catalyst, 10-15 parts of pigment and 15-25 parts of water. The bamboo charcoal is soaked in a diluted HNO3 solution, the bamboo charcoal subjected to acid pickling is smashed and repeatedly washed with deionized water, and drying is conducted after surface impurities are removed; deionized water, absolute ethyl alcohol and / or glacial acetic acid are evenly mixed and then dropwise added into a mixed solution of butyl titanate and absolute ethyl alcohol which are mixed according to the ratio and evenly stirred to obtain TiO sol, dried bamboo charcoal powder is immersed in the TiO sol to stand, and the loaded bamboo charcoal powder is dried, calcined and cooled to obtain the modified bamboo charcoal powder. And through the synergistic effect of the modified bamboo charcoal powder and the catalyst, the formaldehyde removal effect can be more effectively achieved in a short time, so that the environmental protection effect in the actual use process is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of paint technology, in particular to a multi-effect bamboo charcoal aldehyde-removing environment-friendly interior wall paint and a preparation method thereof. BACKGROUND

[0002] With the improvement of people's living quality, indoor decoration gradually becomes an important topic of concern. Some coatings, finishes and part of the decoration materials will release a lot of formaldehyde and other toxic and harmful substances, thereby causing indoor environmental pollution.

[0003] The existing interior wall water paint contains a large amount of volatile organic compounds (VOC) and formaldehyde, and the formaldehyde will exist in the water paint for a long time and slowly volatilize into the indoor air, which makes people prone to respiratory and skin diseases and seriously reduces the quality of life of residents. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a multi-effect bamboo charcoal aldehyde-removing environment-friendly interior wall paint and a preparation method thereof to solve the above problems To solve the above technical problems, the technical scheme adopted by the present application is: The reaction equation of the present application is: Formaldehyde reacts with oxygen to generate carbon dioxide and water under the action of TiO2 and light HCHO + O2→ CO2 + H2O Benzene reacts with hydrogen to generate cyclohexane under the action of Ni catalyst C6H6+H2→C6H 12 Propylene reacts with hydrogen to generate propane under the action of Ni catalyst C3H6+H2→C3H8 Water reacts to generate hydrogen and oxygen under the action of TiO2 or C3N4 catalyst 2H2O → 2H2↑ + O2↑ A multi-effect bamboo charcoal aldehyde-removing environment-friendly interior wall paint comprises the following components by weight: Natural latex solution 65-80 parts Modified bamboo charcoal powder 10-15 parts Antibacterial agent 3-5 parts Dispersing agent 1-3 parts Defoaming agent 0.6-1.0 parts Thickening agent 1-3 parts Film-forming aid 2-3 parts Catalyst 5-10 parts Pigment 10-15 parts Water 15-25 parts The modified bamboo charcoal powder is titanium dioxide modified bamboo charcoal powder, and the preparation method of the modified bamboo charcoal powder is as follows: the bamboo charcoal is soaked in a dilute HNO3 solution, the acid-washed bamboo charcoal is crushed and repeatedly cleaned with deionized water, and the surface impurities are removed after drying; the deionized water, anhydrous ethanol and / or glacial acetic acid are uniformly mixed, and then the mixed solution of tetrabutyl titanate and anhydrous ethanol is added dropwise and uniformly stirred to obtain a TiO2 sol, the dried bamboo charcoal powder is immersed in the TiO2 sol and left to stand, and the loaded bamboo charcoal powder is dried, calcined and cooled to obtain the modified bamboo charcoal powder.

[0005] As a further scheme of the present application, the pore size of the bamboo charcoal powder is 25-35 mesh, the concentration of the dilute HNO3 solution is 2-4 mol / L, the ratio of tetrabutyl titanate to anhydrous ethanol is 1: (7-9), and the calcination temperature is 450-480 DEG C.

[0006] As a further scheme of the present application, the dispersant is a sodium salt of polyacrylic acid, a modified polyacrylic acid solution or a modified polycarboxylate.

[0007] As a further scheme of the present application, the defoaming agent is one or more of mineral oil defoaming agents, silicone defoaming agents and polyether defoaming agents.

[0008] As a further scheme of the present application, the thickening agent is one or more of hydroxyethyl cellulose, a hydrophobically modified alkali-swellable acrylic emulsion and a polyurethane thickening agent.

[0009] As a further scheme of the present application, the film-forming aid is one or more of pentanediol monoisobutyrate, propylene glycol ethyl ether, tripropylene glycol n-butyl ether and 3-ethoxypropyl acetate.

[0010] As a further scheme of the present application, the antibacterial agent is a zinc pyrithione antibacterial agent or a quaternary ammonium salt compound.

[0011] As a further scheme of the present application, the catalyst is a Ni catalyst, a TiO2 catalyst and a C3N4 catalyst.

[0012] A preparation method of a multi-effect bamboo charcoal aldehyde-removing environment-friendly interior wall paint is provided, and the specific steps are as follows: Step one, the modified bamboo charcoal powder, a dispersant, a defoaming agent and a catalyst are added into water and uniformly stirred to obtain a modified bamboo charcoal powder mixture; Step two, natural latex, an antibacterial agent, a thickening agent, a film-forming aid and pigments are mixed and high-speed dispersed to obtain an emulsion mixture; Step three, the modified bamboo charcoal powder mixture is slowly added into the emulsion mixture under stirring and high-speed dispersed, and filtered through a filter screen to obtain the bamboo charcoal aldehyde-removing environment-friendly interior wall paint.

[0013] As a further scheme of the present application, the rotating speed of the high-speed dispersion in step three is 1200-1800 rpm / min, and the aperture of the filter screen is 100-120 mesh.

[0014] Due to the adoption of the above technical scheme, the present application has the following advantages and positive effects: 1. The modified bamboo charcoal powder prepared by loading titanium dioxide on bamboo charcoal powder can make the bamboo charcoal have photocatalytic function, so that the bamboo charcoal can adsorb pollutants and degrade the organic pollutants (VOC) into CO2 and H2O under the irradiation of light, realizing the synergistic effect of adsorption and degradation. 2. The water can be decomposed into H2 and O2 under the irradiation of light by the TiO2 catalyst and C3N4 catalyst, benzene and propylene can be respectively converted into low-toxicity cyclohexane and propane under the action of the Ni catalyst, and formaldehyde can be converted into CO2 and H2O under the action of the TiO2 catalyst. 3. The modified bamboo charcoal powder and the catalyst can synergistically work to more effectively achieve the effect of removing formaldehyde in a short time, thereby ensuring the environmental protection effect in actual use. DETAILED DESCRIPTION

[0015] Embodiment 1 The present application is a multi-effect bamboo charcoal paint for removing formaldehyde and protecting the environment, which comprises the following components by weight: Natural latex solution 65 parts Modified bamboo charcoal powder 10 parts Antibacterial agent 3 parts Dispersing agent 1 part Defoaming agent 0.6 part Thickening agent 1 part Film-forming aid 2 parts Catalyst 5 parts Pigment 10 parts Water 15 parts The modified bamboo charcoal powder is titanium dioxide modified bamboo charcoal powder, and the preparation method of the modified bamboo charcoal powder is as follows: the bamboo charcoal is soaked in a dilute HNO3 solution with a concentration of 2 mol / L, the acid-washed bamboo charcoal is crushed into bamboo charcoal powder with a pore size of 25 mesh and repeatedly washed with deionized water to remove surface impurities and then dried; deionized water, anhydrous ethanol and / or glacial acetic acid are mixed uniformly and then added dropwise into a mixture of butyl titanate and anhydrous ethanol mixed at a ratio of 1:7 and stirred uniformly to obtain TiO2 sol; the dried bamboo charcoal powder is immersed in the TiO2 sol and left to stand; the loaded bamboo charcoal powder is dried, calcined at 450 DEG C and cooled to obtain the modified bamboo charcoal powder; the dispersing agent is a polyacrylic acid sodium salt; the defoaming agent is a mineral oil-based defoaming agent; the thickening agent is hydroxyethyl cellulose; the film-forming aid is pentanediol monoisobutyrate; the antibacterial agent is a zinc pyrithione antibacterial agent; and the catalyst is a Ni catalyst and a TiO2 catalyst.

[0016] A preparation method of a multi-effect bamboo charcoal aldehyde-removing environment-friendly interior wall paint, and the specific steps are as follows: Step one, add modified bamboo charcoal powder, dispersing agent, defoaming agent and catalyst into water and stir uniformly to obtain modified bamboo charcoal powder mixture; Step two, mix natural latex solution, antibacterial agent, thickening agent, film-forming aid and pigment and disperse at high speed to obtain emulsion mixture; Step three, slowly add the modified bamboo charcoal powder mixture into the emulsion mixture under stirring and disperse at high speed, and filter through a filter screen to obtain the bamboo charcoal aldehyde-removing environment-friendly interior wall paint; the rotating speed of high-speed dispersion in step three is 1200 rpm / min, and the aperture of the filter screen is 100 mesh.

[0017] Example 2 The multi-effect bamboo charcoal aldehyde-removing environment-friendly interior wall paint of the present application comprises the following components by weight: Natural latex solution 70 parts Modified bamboo charcoal powder 12 parts Antibacterial agent 4 parts Dispersing agent 2 parts Defoaming agent 0.7 parts Thickening agent 1.8 parts Film-forming aid 2.2 parts Catalyst 7 parts Pigment 11 parts Water 18 parts The modified bamboo charcoal powder is titanium dioxide modified bamboo charcoal powder, and the preparation method of the modified bamboo charcoal powder is as follows: soak the bamboo charcoal in a dilute HNO3 solution with a concentration of 3 mol / L, crush the acid-washed bamboo charcoal into 28-mesh bamboo charcoal powder and repeatedly wash with deionized water, dry after removing the surface impurities; mix deionized water, anhydrous ethanol and or glacial acetic acid uniformly, then add dropwise into a mixture of butyl titanate and anhydrous ethanol mixed at a ratio of 1:8 and stirred uniformly to obtain TiO2 sol, immerse the dried bamboo charcoal powder in the TiO2 sol and stand still, dry the loaded bamboo charcoal powder, calcine at 460℃ and cool to obtain the modified bamboo charcoal powder; The dispersing agent is a modified polyacrylic acid solution, the defoaming agent is an organic silicon-based defoaming agent, the thickening agent is a hydrophobically modified alkali-swellable acrylic emulsion, the film-forming aid is propylene glycol ethyl ether, the antibacterial agent is a quaternary ammonium salt compound, and the catalyst is a Ni catalyst and a C3N4 catalyst.

[0018] A preparation method of a multi-effect bamboo charcoal aldehyde-removing environment-friendly interior wall paint, and the specific steps are as follows: Step one, add modified bamboo charcoal powder, dispersing agent, defoaming agent and catalyst into water and stir uniformly to obtain modified bamboo charcoal powder mixture; Step two, mix natural latex solution, antibacterial agent, thickening agent, film-forming aid and pigment and disperse at high speed to obtain emulsion mixture; Step three, slowly add the modified bamboo charcoal powder mixture to the emulsion mixture under stirring and high speed dispersion, filter with a filter screen to obtain the bamboo charcoal formaldehyde-free environmental protection interior wall paint; the rotation speed of high speed dispersion in step three is 1400 rpm / min, and the aperture of the filter screen is 110 mesh.

[0019] Example 3 The multi-effect bamboo charcoal formaldehyde-free environmental protection interior wall paint of the present application comprises the following components by weight: Natural latex solution 75 parts Modified bamboo charcoal powder 14 parts Antibacterial agent 4.5 parts Dispersing agent 2.5 parts Defoaming agent 0.8 parts Thickening agent 2.5 parts Film-forming aid 2.7 parts Catalyst 8 parts Pigment 13 parts Water 22 parts The modified bamboo charcoal powder is titanium dioxide modified bamboo charcoal powder, and the preparation method of the modified bamboo charcoal powder is as follows: the bamboo charcoal is soaked in a 3.5 mol / L dilute HNO3 solution, the acid-washed bamboo charcoal is crushed into bamboo charcoal powder with a pore size of 30 mesh and repeatedly washed with deionized water to remove surface impurities and then dried; deionized water, anhydrous ethanol and / or glacial acetic acid are mixed uniformly and then added dropwise into a mixed solution of butyl titanate and anhydrous ethanol mixed at a ratio of 1:8 and stirred uniformly to obtain a TiO2 sol, the dried bamboo charcoal powder is immersed in the TiO2 sol and left to stand, and the loaded bamboo charcoal powder is dried, calcined at 470 DEG C and cooled to obtain the modified bamboo charcoal powder; the dispersing agent is a modified polycarboxylate; the defoaming agent is a polyether defoaming agent; the thickening agent is a polyurethane thickening agent; the film-forming aid is tripropylene glycol n-butyl ether; the antibacterial agent is a zinc pyrithione antibacterial agent; and the catalyst is a Ni catalyst and a C3N4 catalyst.

[0020] A preparation method of a multi-effect bamboo charcoal formaldehyde-free environmental protection interior wall paint, and the specific steps are as follows: Step one, add the modified bamboo charcoal powder, dispersing agent, defoaming agent and catalyst into water and stir uniformly to obtain a modified bamboo charcoal powder mixture; Step two, mix the natural latex solution, antibacterial agent, thickening agent, film-forming aid and pigment and disperse at high speed to obtain an emulsion mixture; Step three, slowly add the modified bamboo charcoal powder mixture to the emulsion mixture under stirring and high speed dispersion, filter with a filter screen to obtain the bamboo charcoal formaldehyde-free environmental protection interior wall paint; the rotation speed of high speed dispersion in step three is 1600 rpm / min, and the aperture of the filter screen is 110 mesh.

[0021] Example 4 The multi-effect bamboo charcoal formaldehyde-free environmental protection interior wall paint of the present application comprises the following components by weight: Natural latex 80 parts Modified bamboo charcoal powder 15 parts Antibacterial agent 5 parts Dispersant 3 parts Defoaming agent 1.0 part Thickening agent 3 parts Film-forming aid 3 parts Catalyst 10 parts Pigment 15 parts Water 25 parts The modified bamboo charcoal powder is titanium dioxide modified bamboo charcoal powder, and the preparation method of the modified bamboo charcoal powder is as follows: the bamboo charcoal is soaked in a dilute HNO3 solution with a concentration of 4 mol / L, the acid-washed bamboo charcoal is crushed into bamboo charcoal powder with a pore size of 35 mesh and repeatedly washed with deionized water to remove surface impurities and then dried; deionized water, anhydrous ethanol and / or glacial acetic acid are mixed uniformly and then added dropwise into a mixed solution of butyl titanate and anhydrous ethanol mixed at a ratio of 1:9 and stirred uniformly to obtain a TiO2 sol, the dried bamboo charcoal powder is immersed in the TiO2 sol and left to stand, and the loaded bamboo charcoal powder is dried, calcined at 480°C and cooled to obtain the modified bamboo charcoal powder. The dispersant is a modified polyacrylic acid solution and a modified polycarboxylate; the defoaming agent is an organic silicon defoaming agent and a polyether defoaming agent; the thickening agent is hydroxyethyl cellulose and a polyurethane thickening agent; the film-forming aid is tripropylene glycol n-butyl ether and 3-ethoxypropyl acetate; the antibacterial agent is a zinc pyrithione antibacterial agent and a quaternary ammonium salt compound; and the catalyst is a Ni catalyst, a TiO2 catalyst and a C3N4 catalyst.

[0022] A preparation method of a multi-effect bamboo charcoal aldehyde-removing environment-friendly interior wall paint is as follows: Step one: the modified bamboo charcoal powder, the dispersant, the defoaming agent and the catalyst are added into water and stirred uniformly to obtain a modified bamboo charcoal powder mixture; Step two: the natural latex, the antibacterial agent, the thickening agent, the film-forming aid and the pigment are mixed and high-speed dispersed to obtain an emulsion mixture; Step three: the modified bamboo charcoal powder mixture is slowly added into the emulsion mixture under stirring and high-speed dispersed, and then filtered through a filter screen to obtain the bamboo charcoal aldehyde-removing environment-friendly interior wall paint; the rotation speed of the high-speed dispersion in step three is 1800 rpm / min, and the pore size of the filter screen is 120 mesh.

[0023] Comparative Example 1 Compared with Example 1, the only difference is that the unmodified bamboo charcoal powder is used.

[0024] Comparative Example 2 Compared with Example 2, the only difference is that the unmodified bamboo charcoal powder is used.

[0025] Comparative Example 3 The difference compared with example 3 is only that no catalyst is added.

[0026] Comparative example 4 The difference compared with example 4 is only that no catalyst is added.

[0027] Comparative example 5 The difference compared with example 1 is that no modified bamboo charcoal powder and catalyst are added.

[0028] Comparative example 6 The difference compared with example 1 is that no modified bamboo charcoal powder and catalyst are added.

[0029] Experimental test: two sealed test boxes are set respectively, 1000ml of formaldehyde solution with a concentration of 50% is injected into the open container in the sealed test box, so that the initial formaldehyde concentration reaches 100mg / m 3 The sample board coated with interior wall paint is put into the test box, and the formaldehyde concentration in the two sealed test boxes is measured every certain time (such as 1 hour, 4 hours, 12 hours, 24 hours, 48 hours) using a formaldehyde detector Table 1 is a performance comparison of examples 1-4 and comparative examples 1-4 As can be seen from table 1, the modified bamboo charcoal powder prepared by loading titanium dioxide on the bamboo charcoal powder can make the bamboo charcoal have photocatalytic function, so that it can adsorb pollutants and at the same time, under the irradiation of light, efficiently degrade organic pollutants (VOC) into CO2 and H2O, realizing the synergistic effect of "adsorption-degradation"; through the TiO2 catalyst and C3N4 catalyst, water can be decomposed into H2 and O2 under light irradiation, benzene and propylene can generate low-toxicity cyclohexane and propane respectively under the action of Ni catalyst and H2, and formaldehyde can generate CO2 and H2O under the action of TiO2 catalyst and H2.

[0030] Although the specific embodiments of the present application are described above, those skilled in the art should understand that these are only examples, and various changes or modifications can be made to the present embodiments without departing from the principles and essence of the present application, and the protection scope of the present application is only limited by the appended claims.

Claims

1. A multi-effect bamboo charcoal aldehyde removal environment-friendly interior wall paint, characterized in that: The following components by weight are included: ​ Natural latex liquid 65-80 parts Modified bamboo charcoal powder 10-15 parts Antibacterial agent 3-5 parts Dispersing agent 1-3 parts Defoaming agent 0.6-1.0 parts Thickening agent 1-3 parts Film-forming aid 2-3 parts Catalyst 5-10 parts Pigment 10-15 parts Water 15-25 parts; The modified bamboo charcoal powder is titanium dioxide modified bamboo charcoal powder, and the preparation method of the modified bamboo charcoal powder is as follows: the bamboo charcoal is soaked in a dilute HNO3 solution, the acid-washed bamboo charcoal is crushed and repeatedly cleaned with deionized water, and after removing the surface impurities, it is dried; the deionized water, anhydrous ethanol and / or glacial acetic acid are mixed uniformly, and then the mixed solution of tetrabutyl titanate and anhydrous ethanol is added dropwise and stirred uniformly to obtain a TiO2 sol, the dried bamboo charcoal powder is immersed in the TiO2 sol and left to stand, and the loaded bamboo charcoal powder is dried, calcined and cooled to obtain the modified bamboo charcoal powder.

2. The multi-effect bamboo charcoal aldehyde-removing environment-friendly interior wall paint according to claim 1, characterized in that: The pore size of the bamboo charcoal powder is 25-35 mesh, the concentration of the dilute HNO3 solution is 2-4 mol / L, the ratio of tetrabutyl titanate to anhydrous ethanol is 1: (7-9), and the calcination temperature is 450-480°C.

3. The multi-effect bamboo charcoal aldehyde-removing environmental protection interior wall paint according to claim 1, characterized in that: The dispersing agent is a sodium salt of polyacrylic acid, a modified polyacrylic acid solution or a modified polycarboxylic acid salt.

4. The multi-effect bamboo charcoal aldehyde-removing environment-friendly interior wall paint according to claim 1, characterized in that: The defoaming agent is one or more of mineral oil-based defoaming agents, silicone-based defoaming agents and polyether-based defoaming agents.

5. The multi-effect bamboo charcoal aldehyde-removing environmental protection interior wall paint according to claim 1, characterized in that: The thickening agent is one or more of hydroxyethyl cellulose, hydrophobically modified alkali-swellable acrylic emulsion and polyurethane thickening agent.

6. The multi-effect bamboo charcoal aldehyde-removing environmental protection interior wall paint according to claim 1, characterized in that: The film-forming aid is one or more of pentanediol monoisobutyrate, propylene glycol ethyl ether, tripropylene glycol n-butyl ether and 3-ethoxypropyl acetate.

7. The multi-effect bamboo charcoal aldehyde-removing environmental protection interior wall paint according to claim 1, characterized in that: The antibacterial agent is a zinc pyrithione antibacterial agent or a quaternary ammonium salt compound.

8. The multi-effect bamboo charcoal aldehyde-removing environmental protection interior wall paint according to claim 1, characterized in that: The catalyst is a Ni catalyst, a TiO2 catalyst and a C3N4 catalyst.

9. The preparation method of the multi-effect bamboo charcoal aldehyde removal environmental protection interior wall paint according to any one of claims 1-8, characterized in that: The specific steps are as follows: Step one, the modified bamboo charcoal powder, dispersing agent, defoaming agent and catalyst are added to water and stirred uniformly to obtain a modified bamboo charcoal powder mixture; Step two, the natural latex liquid, antibacterial agent, thickening agent, film-forming aid and pigment are mixed and high-speed dispersed to obtain an emulsion mixture; Step three, the modified bamboo charcoal powder mixture is slowly added to the emulsion mixture under stirring and high-speed dispersed, and filtered through a filter screen to obtain a bamboo charcoal formaldehyde-free environmentally friendly interior wall paint. The rotation speed of the high-speed dispersion in step three is 1200-1800 rpm / min, and the pore size of the filter screen is 100-120 mesh.

10. The preparation method of the multi-effect bamboo charcoal aldehyde removal environmental protection interior wall paint according to claim 9, characterized in that: ​

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