CN109971284B - Fireproof-photocatalytic synergistic functional coating and preparation method thereof - Google Patents
Fireproof-photocatalytic synergistic functional coating and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a fireproof-photocatalytic synergistic functional coating which is prepared by modifying TiO by raw materials such as base material, flame-retardant filler, photocatalytic pigment, film-forming substance, dispersing agent, char-forming agent, wetting agent, foaming agent, flatting agent, thickening agent, drier, drying assistant, alkali activator and the like through catalytic pigment laterite-nickel slag2The preparation method comprises three steps of preparation of the fireproof-photocatalytic synergistic functional coating white slurry and preparation of the fireproof-photocatalytic synergistic functional coating. The coating prepared by the method has the advantages of simple process, convenient operation, environmental friendliness, low manufacturing cost, high fire resistance and high formaldehyde photocatalytic degradation efficiency.
Description
Technical Field
The invention belongs to the field of photocatalytic coatings, and particularly relates to a fireproof-photocatalytic synergistic functional coating and a preparation method thereof.
Background
The ferrochromium slag is chromium-containing waste slag generated in the process of smelting chromium-containing ferroalloy by a pyrogenic process, mainly generated in the process of smelting high-carbon ferrochromium by a submerged arc furnace process, and the main chemical component of the ferrochromium slag is SiO2、Fe2O3、Al2O3、CaO、MgO、Cr2O3、SO3、P2O5And the like. Diatomite is a siliceous rock with SiO as the main chemical component2Since the impurity content is high, it cannot be directly utilized, and deep processing is required. At present, a large amount of ferrochromium slag and diatomite are piled up, so that not only is precious land occupied, but also the surrounding environment and underground water are polluted. Therefore, how to utilize the ferrochromium slag and the diatomite in a large scale and with high added value to realize the reduction of environmental burden and the synergy of enterprises is a problem which needs to be solved urgently.
Inorganic TiO pigment with good thermal stability of metal elements and rare earth elements is generally adopted in the coating industry2Modified to improve TiO2The purposes of very low quantum efficiency, low photocatalytic activity and low visible light utilization rate are achieved, and the improvement of the modified TiO is realized2Absorption capacity for visible light. At present, metal elements and rare earth elements are utilized to couple TiO2The modification has the problems of high cost and complex process.
Disclosure of Invention
To solve the problem of using metal elements and rare earth elements to TiO2The modification has high cost and laborThe invention utilizes the defects of complex process and no flame resistance of the coating filler, and the invention utilizes the ferrochrome slag to TiO2The modified diatomite micropowder is used as a photocatalytic pigment and the diatomite micropowder is used as a flame-retardant filler to prepare the functional coating, and the stirring speed, the stirring time, the stirring temperature, the heating speed, the calcining temperature and the like are controlled, so that the high-added-value recycling of metallurgical solid wastes is realized, and the functional coating with photocatalytic performance and fireproof performance is obtained.
In order to achieve the aim, the fireproof-photocatalytic synergistic functional coating comprises the following components in percentage by mass:
wherein the base material is aluminum dihydrogen phosphate; the flame-retardant filler is silica powder micro powder; the photocatalytic pigment is modified TiO of laterite-nickel ore slag2(ii) a The film forming material is acrylic emulsion; the dispersant is sodium tripolyphosphate; the charring agent is sorbitol; the wetting agent is sodium acrylate; the foaming agent is melamine; the leveling agent is polyether modified polysiloxane; the thickening agent is polyurethane macromolecular compound aqueous solution; the drier is lead oxide; the drying assistant is zinc powder; the alkali activator is sodium hydroxide; the water is deionized water.
The preparation method of the fireproof-photocatalytic synergistic functional coating adopts the following technical scheme:
step one, modifying TiO with photocatalytic pigment laterite-nickel ore slag2The preparation of (1): firstly, according to the volume ratio of tetrabutyl titanate to absolute ethyl alcohol of 1: 3, stirring the mixture for 30 to 45 minutes under the condition of 600 to 800r/min by using a constant-temperature magnetic stirrer to obtain a uniform transparent solution, then slowly adding a dilute nitric acid solution in which laterite-nickel slag micro powder is dissolved into the solution under the condition of 800 to 1000r/min, stirring the solution for 45 to 60 minutes under the condition of 800 to 1000r/min to obtain a liquid sol, aging the liquid sol at room temperature to form a dry gel, then putting the dry gel into a medium-temperature experimental furnace to be heated to 600 to 800 ℃ at the speed of 1.5 to 2.5 ℃/min, keeping the temperature for 2 hours, and naturally cooling the dry gel to the room temperature to obtain the dry gelTo photocatalytic pigment of laterite-nickel slag modified TiO2；
Step two, preparing the white slurry of the fireproof-photocatalytic synergistic functional coating: stirring a dispersing agent and water for 5-10 min under the condition of 1000-1500 r/min, sequentially adding a base material and a flame-retardant filler, stirring for 5-10 min under the condition of 1000-1500 r/min, and adding the photocatalytic pigment, namely the laterite-nickel ore slag modified TiO prepared in the first step2Stirring for 5-10 min under the condition of 1000-1500 r/min, then sequentially adding a film forming substance, a char forming agent, a wetting agent and a foaming agent, stirring for 15-45 min under the condition of 800-1000 r/min, and obtaining the fireproof-photocatalytic synergistic functional coating white slurry;
step three, preparing the fireproof-photocatalytic synergistic functional coating: and pouring the white slurry of the fireproof-photocatalytic synergistic performance functional coating obtained in the step two into a paint mixing cylinder, stirring for 10-20 min at the speed of 500-800 r/min, sequentially adding a leveling agent, a thickening agent, a drier, a drying assistant and an alkali activator, stirring for 15-45 min at the speed of 500-800 r/min, and obtaining the fireproof-photocatalytic synergistic performance functional coating.
By adopting the technical scheme, on one hand, the SiO contained in the laterite-nickel slag is treated by dilute nitric acid solution2、FeO、Al2O3、CaO、MgO、Cr2O3MnO and the like are partially dissolved and then TiO is added2Modifying to realize the modification of the laterite-nickel slag into TiO2The aim of degrading formaldehyde by photocatalysis under a visible light source is fulfilled; on the other hand, the silicon powder micro powder contains a large amount of silicon elements, and the silicon powder micro powder forms a compact amorphous siliceous layer under the action of the alkali activator, so that the flame retardant effect is improved.
Further, the photocatalytic pigment laterite-nickel ore slag modified TiO prepared in the step one2The mass content of the medium laterite-nickel slag micro powder is 40-60%.
Furthermore, tetrabutyl titanate, absolute ethyl alcohol and nitric acid in the step one are analytically pure.
In conclusion, the beneficial effects of the invention are as follows: TiO pair by using laterite nickel slag2Is modified as lightThe catalytic pigment and the silica powder are used as flame-retardant fillers to prepare the fireproof-photocatalytic synergistic functional coating, so that a new way for utilizing metallurgical solid waste is developed, the application of high added value of the metallurgical solid waste is realized, and the purpose of 'using waste to increase efficiency' is achieved; not only solves the problem of utilizing metal elements and rare earth elements to TiO2The modification has the problems of high cost and complex process, and the coating filler has the defect of no flame resistance, so that the fire-retardant coating is endowed with brand new functions, the way of novel functional coatings is developed, the production cost of the photocatalytic fire-retardant coating is reduced by about 30 percent, and the market competitiveness of the photocatalytic fire-retardant coating is improved; the coating prepared by the method has the advantages of simple process, convenient operation, environmental friendliness, low manufacturing cost, high fire resistance and high formaldehyde photocatalytic degradation efficiency.
Drawings
FIG. 1 is a schematic view of an HJC-1 environmental test chamber simulating an indoor environment under a visible light source;
FIG. 2 is a schematic representation of the fire resistance test;
in the figure: 1. a temperature and humidity sensor; 2. a sampling port; 3. a fan; 4. a visible light source; 5. alcohol blowtorch; 6. a support; 7. an iron stand with an iron clamp; 8. a test board; a. formaldehyde gas; b. a functional coating with fire-proof and photocatalysis synergistic performance.
Detailed Description
The invention is further illustrated by the following examples:
example 1
The components used for preparing 100g of the product of the invention and the mass ratio thereof are as follows:
wherein the base material is aluminum dihydrogen phosphate; the flame-retardant filler is silica powder micro powder; the photocatalytic pigment is modified TiO of laterite-nickel ore slag2(ii) a The film forming material is acrylic emulsion; the dispersant is sodium tripolyphosphate; the charring agent is sorbitol; the wetting agent is sodium acrylate; the foaming agent is melamine; the leveling agent is polyether modified polysiloxane;the thickening agent is polyurethane macromolecular compound aqueous solution; the drier is lead oxide; the drying assistant is zinc powder; the alkali activator is sodium hydroxide; the water is deionized water.
Step one, modifying TiO with photocatalytic pigment laterite-nickel ore slag2The preparation of (1): firstly, according to the volume ratio of tetrabutyl titanate to absolute ethyl alcohol of 1: 3, stirring for 35min under the condition of 800r/min by using a constant-temperature magnetic stirrer to obtain a uniform transparent solution, then slowly adding a dilute nitric acid solution in which laterite-nickel slag micro powder is dissolved into the solution under the condition of 900r/min, stirring for 60min under the condition of 800r/min to obtain a liquid sol, ageing the liquid sol indoors to form a dried gel, then placing the dried gel into a medium-temperature experimental furnace to be heated to 700 ℃ at the speed of 1.5 ℃/min, keeping the temperature for 2h, and naturally cooling to room temperature to obtain the laterite-nickel slag modified TiO2. The laterite-nickel slag modified TiO2The mass percentage of the laterite-nickel ore slag micro powder is 45%; the tetrabutyl titanate, the absolute ethyl alcohol and the nitric acid are analytically pure.
Step two, preparing the white slurry of the fireproof-photocatalytic synergistic functional coating: stirring a dispersing agent and water for 7min under the condition of 1500r/min, sequentially adding a base material and a flame-retardant filler, stirring for 10min under the condition of 1300r/min, adding a photocatalytic pigment, stirring for 5min under the condition of 1000r/min, sequentially adding a film-forming substance, a char-forming agent, a wetting agent and a foaming agent, stirring for 45min under the condition of 900r/min, and obtaining the white slurry of the fireproof-photocatalytic synergistic-performance functional coating.
Step three, preparing the fireproof-photocatalytic synergistic functional coating: pouring the white slurry of the fireproof-photocatalytic synergistic performance functional coating into a paint mixing cylinder, stirring for 20min at the speed of 500r/min, sequentially adding a leveling agent, a thickening agent, a drier, a drying assistant and an alkali activator, and stirring for 15min at the speed of 600r/min to obtain the fireproof-photocatalytic synergistic performance functional coating.
Example 2
The components used for preparing 100g of the product of the invention and the mass ratio thereof are as follows:
wherein the base material is aluminum dihydrogen phosphate; the flame-retardant filler is silica powder micro powder; the photocatalytic pigment is modified TiO of laterite-nickel ore slag2(ii) a The film forming material is acrylic emulsion; the dispersing agent is sodium tripolyphosphate; the charring agent is sorbitol; the wetting agent is sodium acrylate; the foaming agent is melamine; the leveling agent is polyether modified polysiloxane; the thickening agent is a polyurethane high molecular compound aqueous solution; the drier is lead oxide; the drying aid is zinc powder; the alkali activator is sodium hydroxide; the water is deionized water.
Step one, modifying TiO with photocatalytic pigment laterite-nickel ore slag2The preparation of (1): firstly, according to the volume ratio of tetrabutyl titanate to absolute ethyl alcohol of 1: 3, stirring for 45min at 600r/min by using a constant-temperature magnetic stirrer to obtain a uniform transparent solution, then slowly adding a dilute nitric acid solution in which laterite-nickel slag micro powder is dissolved into the solution at 1000r/min, stirring for 50min at 900r/min to obtain a liquid sol, ageing the liquid sol indoors to form a dried gel, then placing the dried gel into a medium-temperature experimental furnace to be heated to 800 ℃ at 2 ℃/min, keeping the temperature for 2h, and naturally cooling to room temperature to obtain the laterite-nickel slag modified TiO2. The laterite-nickel slag modified TiO2The mass percentage of the laterite-nickel ore slag micro powder is 55%; the tetrabutyl titanate, the absolute ethyl alcohol and the nitric acid are analytically pure.
Step two, preparing the white slurry of the fireproof-photocatalytic synergistic functional coating: stirring a dispersing agent and water for 10min at 1200r/min, sequentially adding a base material and a flame-retardant filler, stirring for 5min at 1100r/min, adding a photocatalytic pigment, stirring for 8min at 1500r/min, sequentially adding a film-forming substance, a char-forming agent, a wetting agent and a foaming agent, stirring for 25min at 800r/min, and obtaining the fireproof-photocatalytic synergistic functional coating white slurry.
Step three, preparing the fireproof-photocatalytic synergistic functional coating: pouring the white slurry of the fireproof-photocatalytic synergistic performance functional coating into a paint mixing cylinder, stirring for 15min at the speed of 700r/min, sequentially adding a flatting agent, a thickening agent, a drier, a drying assistant and an alkali activator, and stirring for 35min at the speed of 800r/min to obtain the fireproof-photocatalytic synergistic performance functional coating.
Example 3
The components used for preparing 100g of the product of the invention and the mass ratio thereof are as follows:
wherein the base material is aluminum dihydrogen phosphate; the flame-retardant filler is silica powder micro powder; the photocatalytic pigment is modified TiO of laterite-nickel ore slag2(ii) a The film forming material is acrylic emulsion; the dispersant is sodium tripolyphosphate; the charring agent is sorbitol; the wetting agent is sodium acrylate; the foaming agent is melamine; the leveling agent is polyether modified polysiloxane; the thickening agent is polyurethane macromolecular compound aqueous solution; the drier is lead oxide; the drying assistant is zinc powder; the alkali activator is sodium hydroxide; the water is deionized water.
Step one, modifying TiO with photocatalytic pigment laterite-nickel ore slag2The preparation of (1): firstly, according to the volume ratio of tetrabutyl titanate to absolute ethyl alcohol of 1: 3, stirring the mixture for 30min at the speed of 700r/min by using a constant-temperature magnetic stirrer to obtain a uniform transparent solution, then slowly adding a dilute nitric acid solution in which laterite-nickel slag micro powder is dissolved into the solution at the speed of 800r/min, stirring the solution for 55min at the speed of 1000r/min to obtain a liquid sol, ageing the liquid sol indoors to form a dried gel, then placing the dried gel into a medium-temperature experimental furnace to be heated to 600 ℃ at the speed of 2.5 ℃/min, keeping the temperature for 2h, and naturally cooling the dried gel to room temperature to obtain the laterite-nickel slag modified TiO2. The laterite-nickel slag modified TiO2The mass percentage of the laterite-nickel ore slag micro powder is 40%; the tetrabutyl titanate, the absolute ethyl alcohol and the nitric acid are analytically pure.
Step two, preparing the white slurry of the fireproof-photocatalytic synergistic functional coating: stirring a dispersing agent and water for 5min at 1100r/min, sequentially adding a base material and a flame-retardant filler, stirring for 8min at 1500r/min, adding a photocatalytic pigment, stirring for 7min at 1200r/min, sequentially adding a film-forming substance, a char-forming agent, a wetting agent and a foaming agent, stirring for 15min at 1000r/min, and obtaining the fireproof-photocatalytic synergistic functional coating white slurry.
Step three, preparing the fireproof-photocatalytic synergistic functional coating: pouring the white slurry of the fireproof-photocatalytic synergistic performance functional coating into a paint mixing cylinder, stirring for 10min at the speed of 800r/min, sequentially adding a leveling agent, a thickening agent, a drier, a drying assistant and an alkali activator, and stirring for 45min at the speed of 700r/min to obtain the fireproof-photocatalytic synergistic performance functional coating.
Example 4
The components used for preparing 100g of the product of the invention and the mass ratio thereof are as follows:
wherein the base material is aluminum dihydrogen phosphate; the flame-retardant filler is silica powder micro powder; the photocatalytic pigment is modified TiO of laterite-nickel ore slag2(ii) a The film forming material is acrylic emulsion; the dispersant is sodium tripolyphosphate; the charring agent is sorbitol; the wetting agent is sodium acrylate; the foaming agent is melamine; the leveling agent is polyether modified polysiloxane; the thickening agent is polyurethane macromolecular compound aqueous solution; the drier is lead oxide; the drying assistant is zinc powder; the alkali activator is sodium hydroxide; the water is deionized water.
Step one, modifying TiO with photocatalytic pigment laterite-nickel ore slag2The preparation of (1): firstly, according to the volume ratio of tetrabutyl titanate to absolute ethyl alcohol of 1: 3, stirring the mixture for 40min at the speed of 800r/min by using a constant-temperature magnetic stirrer to obtain a uniform transparent solution, then slowly adding a dilute nitric acid solution dissolved with laterite-nickel slag micro powder into the solution at the speed of 800r/min, stirring the mixture for 45min at the speed of 800r/min to obtain a liquid sol, and mixing the sol with absolute ethyl alcoholAgeing the mixture indoors to form dry gel, then putting the dry gel into a moderate temperature experimental furnace to be heated to 700 ℃ at the speed of 2 ℃/min, keeping the temperature for 2h, and naturally cooling to room temperature to obtain the laterite-nickel ore slag modified TiO2. The laterite-nickel slag modified TiO2The mass percent of the medium laterite-nickel slag micro powder is 60 percent; the tetrabutyl titanate, the absolute ethyl alcohol and the nitric acid are analytically pure.
Step two, preparing the white slurry of the fireproof-photocatalytic synergistic functional coating: stirring dispersing agent and water for 8min at 1000r/min, sequentially adding base material and flame-retardant filler, stirring for 7min at 120r/min, adding photocatalytic pigment, stirring for 10min at 1300r/min, sequentially adding film-forming substance, char-forming agent, wetting agent and foaming agent, stirring for 35min at 800r/min to obtain the white slurry of the fireproof-photocatalytic synergistic functional coating.
Step three, preparing the fireproof-photocatalytic synergistic functional coating: pouring the white slurry of the fireproof-photocatalytic synergistic performance functional coating into a paint mixing cylinder, stirring for 20min at the speed of 600r/min, sequentially adding a leveling agent, a thickening agent, a drier, a drying assistant and an alkali activator, and stirring for 25min at the speed of 500r/min to obtain the fireproof-photocatalytic synergistic performance functional coating.
Example 5
The components used for preparing 100g of the product of the invention and the mass ratio thereof are as follows:
wherein the base material is aluminum dihydrogen phosphate; the flame-retardant filler is silica powder micro powder; the photocatalytic pigment is modified TiO of laterite-nickel ore slag2(ii) a The film forming material is acrylic emulsion; the dispersant is sodium tripolyphosphate; the charring agent is sorbitol; the wetting agent is sodium acrylate; the foaming agent is melamine; the leveling agent is polyether modified polysiloxane; the thickening agent is polyurethane macromolecular compound aqueous solution; the drier is lead oxide; the drying assistant is zinc powder; the alkali activator is sodium hydroxide; the water is deionized water.
Step one, photocatalytic pigment laterite-nickel oreSlag modified TiO2The preparation of (1): firstly, according to the volume ratio of tetrabutyl titanate to absolute ethyl alcohol of 1: 3, stirring for 35min at 700r/min by using a constant-temperature magnetic stirrer to obtain a uniform transparent solution, then slowly adding a dilute nitric acid solution in which laterite-nickel slag micro powder is dissolved into the solution at 1000r/min, stirring for 55min at 1000r/min to obtain a liquid sol, ageing the liquid sol indoors to form a dried gel, then placing the dried gel into a medium-temperature experimental furnace to be heated to 600 ℃ at 1.5 ℃/min, keeping the temperature for 2h, and naturally cooling to room temperature to obtain the laterite-nickel slag modified TiO2. The laterite-nickel slag modified TiO2The mass percentage of the laterite-nickel ore slag micro powder is 50%; the tetrabutyl titanate, the absolute ethyl alcohol and the nitric acid are analytically pure.
Step two, preparing the white slurry of the fireproof-photocatalytic synergistic functional coating: stirring a dispersing agent and water for 9min at 1400r/min, sequentially adding a base material and a flame-retardant filler, stirring for 6min at 1000r/min, adding a photocatalytic pigment, stirring for 9min at 1400r/min, sequentially adding a film-forming substance, a char-forming agent, a wetting agent and a foaming agent, stirring for 35min at 900r/min, and obtaining the white slurry of the fireproof-photocatalytic synergistic functional coating.
Step three, preparing the fireproof-photocatalytic synergistic functional coating: pouring the white slurry of the fireproof-photocatalytic synergistic performance functional coating into a paint mixing cylinder, stirring for 15min at the speed of 500r/min, sequentially adding a leveling agent, a thickening agent, a drier, a drying assistant and an alkali activator, and stirring for 15min at the speed of 700r/min to obtain the fireproof-photocatalytic synergistic performance functional coating.
Example 6
The components used for preparing 100g of the product of the invention and the mass ratio thereof are as follows:
wherein the base material is aluminum dihydrogen phosphate; the flame-retardant filler is silica powder micro powder; the photocatalytic pigment is modified TiO of laterite-nickel ore slag2(ii) a The film forming material is acrylic emulsion; the dispersant is sodium tripolyphosphate; the charring agent is sorbitol; the wetting agent is sodium acrylate; the foaming agent is melamine; the leveling agent is polyether modified polysiloxane; the thickening agent is polyurethane macromolecular compound aqueous solution; the drier is lead oxide; the drying assistant is zinc powder; the alkali activator is sodium hydroxide; the water is deionized water.
Step one, modifying TiO with photocatalytic pigment laterite-nickel ore slag2The preparation of (1): according to the volume ratio of tetrabutyl titanate to absolute ethyl alcohol of 1: 3, stirring for 45min at 600r/min by using a constant-temperature magnetic stirrer to obtain a uniform transparent solution, slowly adding a dilute nitric acid solution in which laterite-nickel slag micro powder is dissolved into the solution at 900r/min, stirring for 45min at 900r/min to obtain a liquid sol, ageing the liquid sol indoors to form a dried gel, then putting the dried gel into a medium-temperature experimental furnace, heating to 800 ℃ at the speed of 2.5 ℃/min, keeping the temperature for 2h, and naturally cooling to room temperature to obtain the laterite-nickel slag modified TiO2. The laterite-nickel slag modified TiO2The mass percentage of the laterite-nickel ore slag micro powder is 45%; the tetrabutyl titanate, the absolute ethyl alcohol and the nitric acid are analytically pure.
Step two, preparing the white slurry of the fireproof-photocatalytic synergistic functional coating: stirring a dispersing agent and water for 6min under the condition of 1300r/min, sequentially adding a base material and a flame-retardant filler, stirring for 9min under the condition of 1400r/min, adding a photocatalytic pigment, stirring for 6min under the condition of 1100r/min, sequentially adding a film-forming substance, a char-forming agent, a wetting agent and a foaming agent, stirring for 25min under the condition of 1000r/min, and obtaining the white slurry of the fireproof-photocatalytic synergistic-performance functional coating.
Step three, preparing the fireproof-photocatalytic synergistic functional coating: pouring the white slurry of the fireproof-photocatalytic synergistic performance functional coating into a paint mixing cylinder, stirring for 10min at the speed of 800r/min, sequentially adding a leveling agent, a thickening agent, a drier, a drying assistant and an alkali activator, stirring for 25min at the speed of 500r/min, and obtaining the fireproof-photocatalytic synergistic performance functional coating.
Comparative example 1
The components used for preparing 100g of the product of the invention and the mass ratio thereof are as follows:
wherein the base material is aluminum dihydrogen phosphate; the photocatalytic pigment is modified TiO of laterite-nickel ore slag2(ii) a The film forming material is acrylic emulsion; the dispersant is sodium tripolyphosphate; the charring agent is sorbitol; the wetting agent is sodium acrylate; the foaming agent is melamine; the leveling agent is polyether modified polysiloxane; the thickening agent is polyurethane macromolecular compound aqueous solution; the drier is lead oxide; the drying assistant is zinc powder; the alkali activator is sodium hydroxide; the water is deionized water.
Firstly, according to the volume ratio of tetrabutyl titanate to absolute ethyl alcohol of 1: 3, stirring for 45min at 600r/min by using a constant-temperature magnetic stirrer to obtain a uniform transparent solution, then slowly adding a dilute nitric acid solution in which laterite-nickel slag micro powder is dissolved into the solution at 900r/min, stirring for 45min at 900r/min to obtain a liquid sol, ageing the liquid sol indoors to form a dried gel, then placing the dried gel into a medium-temperature experimental furnace to be heated to 800 ℃ at the speed of 2.5 ℃/min, keeping the temperature for 2h, and naturally cooling to room temperature to obtain the laterite-nickel slag modified TiO2. The laterite-nickel slag modified TiO2The mass percentage of the laterite-nickel ore slag micro powder is 45%; the tetrabutyl titanate, the absolute ethyl alcohol and the nitric acid are analytically pure.
Secondly, stirring the dispersing agent and water for 6min under the condition of 1300r/min, adding the base material and stirring for 9min under the condition of 1400r/min, adding the photocatalytic pigment and stirring for 6min under the condition of 1100r/min, sequentially adding the film-forming substance, the char-forming agent, the wetting agent and the foaming agent and stirring for 25min under the condition of 1000r/min, and obtaining the white slurry of the photocatalytic functional coating.
And finally, pouring the white slurry of the photocatalytic functional coating into a paint mixing cylinder, stirring for 10min at the speed of 800r/min, sequentially adding a flatting agent, a thickening agent, a drier, a drying assistant and an alkali activator, and stirring for 25min at the speed of 500r/min to obtain the photocatalytic functional coating.
Comparative example 2
The components used for preparing 100g of the product of the invention and the mass ratio thereof are as follows:
wherein the base material is aluminum dihydrogen phosphate; the flame-retardant filler is silica powder micro powder; the film forming material is acrylic emulsion; the dispersant is sodium tripolyphosphate; the charring agent is sorbitol; the wetting agent is sodium acrylate; the foaming agent is melamine; the leveling agent is polyether modified polysiloxane; the thickening agent is polyurethane macromolecular compound aqueous solution; the drier is lead oxide; the drying assistant is zinc powder; the alkali activator is sodium hydroxide; the water is deionized water.
Firstly, stirring a dispersing agent and water for 6min at 1300r/min, then sequentially adding a base material and a flame-retardant filler, stirring for 9min at 1400r/min, then sequentially adding a film-forming substance, a char-forming agent, a wetting agent and a foaming agent, and stirring for 25min at 1000r/min to obtain the fireproof performance functional coating white slurry.
And finally, pouring the white slurry of the fireproof performance functional coating into a paint mixing cylinder, stirring for 10min at the speed of 800r/min, sequentially adding the flatting agent, the thickening agent, the drier, the drying assistant and the alkali activator, and stirring for 25min at the speed of 500r/min to obtain the fireproof performance functional coating.
The performance test procedures of the preparation examples 1-6 and the comparative examples 1-2 are as follows:
an HJC-1 type environment test cabin commonly adopted in the European Union is utilized to simulate indoor environment under a visible light source, as shown in the attached figure 1 of the specification: the temperature and humidity sensor 1 is used, the temperature is set to be 23 +/-0.5 ℃, and the humidity is set to be 45 +/-3%. Dripping 2.5 mu L of 37-40% formaldehyde analytical pure solution on a culture dish, putting the culture dish into an environmental test chamber, and filling the environmental test chamber with the formaldehyde analytical pure solutionVolatilizing, and making the concentration of formaldehyde gas a in the whole environment test chamber be 1mg/m by using fan 33. The fireproof-photocatalytic synergistic performance functional coating b with the theoretical coating thickness (200 mu m) is loaded to 0.1m2The test plate of (1) is excited by a visible light source (4) to produce a catalytic effect. By adopting an acetylacetone spectrophotometry (GB/T15516-1995), sampling gas in a 10L cabin at 240min by using a sampling port 2, and detecting the concentration change of formaldehyde gas in an environment testing cabin, the efficiency of photocatalytic degradation of the coating with the fireproof-photocatalytic synergistic performance can be calculated.
As shown in the attached figure 2 of the specification, a vertical combustion method is adopted: the fireproof-photocatalytic synergistic performance functional coating b is covered on one side of a test board 8 and is placed on an iron stand 7 with an iron clamp, one side of the test board coated with the fireproof-photocatalytic synergistic performance functional coating faces an alcohol blast burner 5, the vertical distance between the test board and an alcohol blast burner is about 7cm, and when the flame temperature reaches about 1000 ℃, timing is started until the detection end point. During detection, the back fire surface of the test board is carbonized during combustion, cracks appear, and the end point of the flame-resistant time (min) is determined.
TABLE 1 functional coatings Performance test results for fire-retardant-photocatalytic synergy Performance
| Serial number | Flame resistance time/min | Efficiency/% of photocatalytic degradation of formaldehyde |
| Example 1 | 57 | 54.2 |
| Example 2 | 84 | 61.1 |
| Example 3 | 66 | 49.6 |
| Example 4 | 75 | 57.6 |
| Example 5 | 82 | 48.2 |
| Example 6 | 54 | 60.3 |
| Comparative example 1 | 12 | 40.6 |
| Comparative example 2 | 54 | 4.9 |
As can be seen from the above table, the fireproof-photocatalytic synergistic functional coating has not only good flame retardant performance but also excellent photocatalytic performance as can be seen from the test data of examples 1-6 and comparative examples 1 and 2.
Claims (3)
1. The preparation method of the fireproof-photocatalytic synergistic functional coating is characterized by comprising the following steps of: the fireproof-photocatalytic synergistic functional coating comprises the following components in percentage by mass:
2.0 to 4.0 percent of base material
10.0 to 20.0 percent of flame-retardant filler
15.0 to 25.0 percent of photocatalytic pigment
20.0 to 30.0 percent of film forming substance
2.0 to 4.0 percent of dispersant
1.0 to 5.0 percent of charring agent
0.5 to 2.5 percent of wetting agent
1.0 to 2.0 percent of foaming agent
1.0 to 2.0 percent of flatting agent
1.0 to 2.0 percent of thickening agent
0.5 to 1.5 percent of drier
0.5 to 1.5 percent of drying assistant agent
0.3 to 1.5 percent of alkali activator
15.0 to 45.0 percent of water
The base material is aluminum dihydrogen phosphate; the flame-retardant filler is silica powder micro powder; the photocatalytic pigment is modified TiO of laterite-nickel ore slag2(ii) a The film forming material is acrylic emulsion; the dispersing agent is sodium tripolyphosphate; the charring agent is sorbitol; the wetting agent is sodium acrylate; the foaming agent is melamine; the leveling agent is polyether modified polysiloxane; the thickening agent is a polyurethane high molecular compound aqueous solution; the drier is lead oxide; the drying aid is zinc powder; the alkali activator is sodium hydroxide; the water is deionized water;
the method comprises the following steps:
step one, modifying TiO with photocatalytic pigment laterite-nickel ore slag2The preparation of (1): firstly, according to the volume ratio of tetrabutyl titanate to absolute ethyl alcohol of 1: 3, stirring the mixture for 30 to 45min under the condition of 600 to 800r/min by using a constant-temperature magnetic stirrer to obtain a uniform transparent solution, then slowly adding a dilute nitric acid solution dissolved with laterite-nickel slag micro powder into the solution under the condition of 800 to 1000r/min, and stirring the mixture for 45min under the condition of 800 to 1000r/minObtaining liquid sol after 60min, aging at room temperature to form dry gel, then putting the dry gel into a medium-temperature experimental furnace, heating to 600-800 ℃ at the speed of 1.5-2.5 ℃/min, keeping the temperature for 2h, and naturally cooling to room temperature to obtain the photocatalytic pigment, namely the laterite-nickel ore slag modified TiO2；
Step two, preparing the white slurry of the fireproof-photocatalytic synergistic functional coating: stirring a dispersing agent and water for 5min to 10min under the condition of 1000r/min to 1500r/min, sequentially adding a base material and a flame-retardant filler, stirring for 5min to 10min under the condition of 1000r/min to 1500r/min, and adding the photocatalytic pigment, namely the laterite-nickel ore slag modified TiO prepared in the first step2Stirring for 5-10 min under the condition of 1000-1500 r/min, sequentially adding a film forming substance, a char forming agent, a wetting agent and a foaming agent, stirring for 15-45 min under the condition of 800-1000 r/min, and obtaining the fireproof-photocatalytic synergistic functional coating white slurry;
step three, preparing the fireproof-photocatalytic synergistic functional coating: and pouring the white slurry of the fireproof-photocatalytic synergistic performance functional coating obtained in the step two into a paint mixing cylinder, stirring for 10-20 min at the speed of 500-800 r/min, sequentially adding a leveling agent, a thickening agent, a drier, a drying assistant and an alkali activator, stirring for 15-45 min at the speed of 500-800 r/min, and obtaining the fireproof-photocatalytic synergistic performance functional coating.
2. The preparation method of the fireproof-photocatalytic synergistic functional coating as claimed in claim 1, wherein the preparation method comprises the following steps: the photocatalytic pigment prepared in the step one is laterite-nickel ore slag modified TiO2The mass content of the medium laterite-nickel slag micro powder is 40% -60%.
3. The preparation method of the fireproof-photocatalytic synergistic functional coating as claimed in claim 1, wherein the preparation method comprises the following steps: and D, the tetrabutyl titanate, the absolute ethyl alcohol and the nitric acid in the step I are analytically pure.
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| CN103865303A (en) * | 2014-04-03 | 2014-06-18 | 安徽工业大学 | Fire-retardant coating with photo-catalytic performance and preparation method thereof |
| CN104744976A (en) * | 2015-03-27 | 2015-07-01 | 中国十七冶集团有限公司 | Fire retardant coating with photocatalytic performance and preparation method thereof |
| CN106479291A (en) * | 2016-09-23 | 2017-03-08 | 长安大学 | A kind of external wall degrading tail gas fire resistant coating material and preparation method |
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| CN103865303A (en) * | 2014-04-03 | 2014-06-18 | 安徽工业大学 | Fire-retardant coating with photo-catalytic performance and preparation method thereof |
| CN104744976A (en) * | 2015-03-27 | 2015-07-01 | 中国十七冶集团有限公司 | Fire retardant coating with photocatalytic performance and preparation method thereof |
| CN106479291A (en) * | 2016-09-23 | 2017-03-08 | 长安大学 | A kind of external wall degrading tail gas fire resistant coating material and preparation method |
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