CN112625568A - Preparation method of aldehyde-removing composite coating for artificial board - Google Patents
Preparation method of aldehyde-removing composite coating for artificial board Download PDFInfo
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Abstract
The invention relates to a preparation method of an aldehyde-removing composite coating for an artificial board, belonging to the technical field of wood board coatings. The invention takes nano titanium dioxide and carbon nano tubes as aldehyde removing fillers to prepare the aldehyde removing composite coating for the artificial board, wherein the carbon nano tubes are nano materials with porous structures and can bind formaldehyde molecules by virtue of van der Waals force of surface molecules, so that the effect of absorbing formaldehyde is achieved; electrons on the valence band of the nano titanium dioxide are excited to enter the conduction band to form a cavity, and the cavity and oxygen and water on the surface of the titanium dioxide form hydroxyl radicals and superoxide anions which can emit lightCatalytic oxidation of formaldehyde to CO2And H2O, and the aldehyde removal durability is better; silver is loaded on the surfaces of the carbon nano tube and the nano titanium dioxide, the silver has good active oxygen adsorption capacity and can effectively adsorb formaldehyde, and the active oxygen and the formaldehyde can generate oxidation reaction, so that the formaldehyde is effectively purified.
Description
Technical Field
The invention relates to a preparation method of an aldehyde-removing composite coating for an artificial board, belonging to the technical field of wood board coatings.
Background
The scientific and technological progress and the social development make people pay more and more attention to the physical health of the people and also make the requirements of the people on the living environment higher and higher. People love the nature to enjoy decorating rooms by wood plates, but the wood plates are expensive, so that artificial plates such as shaving boards and composite plates are often selected by people. When the artificial board is prepared, an adhesive is needed, and the adhesive often contains unreacted free formaldehyde, which is a main source of formaldehyde pollution in indoor air. The woodware paint is an indispensable protective layer for wooden furniture. Therefore, the woodware coating with the function of effectively removing formaldehyde is developed, the woodware coating has the function of removing formaldehyde while decorating and protecting the base material, and not only can be used for removing the formaldehyde released from the base material, but also can be used for removing the formaldehyde released into the air, so that the woodware coating has important practical significance.
The most effective treatment method for formaldehyde in indoor air is windowing and ventilation, and the formaldehyde in the indoor air is discharged outdoors by air circulation replacement. However, the method only transfers the formaldehyde to the outdoor, which does not fundamentally eliminate the harm of the formaldehyde and simultaneously enlarges the formaldehyde pollution range. Therefore, it is necessary to deal with formaldehyde contamination from a molecular perspective. The wood ware coating is a decoration material required in the preparation of common wood boards and wood furniture, and if the wood ware coating has the formaldehyde removing function, the wood ware coating can effectively isolate formaldehyde released inside the wood, purify existing formaldehyde in air and protect a wood substrate at the same time, thereby achieving multiple purposes.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the problem that the formaldehyde harm cannot be eliminated fundamentally by a method of discharging indoor formaldehyde by air circulation replacement, the preparation method of the formaldehyde-removing composite coating for the artificial board is provided.
In order to solve the technical problems, the invention adopts the technical scheme that:
(1) adding 2, 4-toluene diisocyanate trimer into butyl acetate, and stirring at the rotating speed of 200-250 r/min for 20-30 min at normal temperature to obtain a mixed curing agent;
(2) adding alkyd resin into 2-imidazolidinone ethanol dispersion, and stirring at the rotating speed of 400-500 r/min for 40-60 min at normal temperature to obtain resin mixed solution;
(3) adding the mixed curing agent, polyethylene glycol, glycerol and stearamide into the resin mixed solution, placing the mixture into a high-speed stirrer, stirring the mixture for 10 to 20 minutes at the normal temperature at the rotating speed of 1000 to 1200r/min, then placing the mixture into an ultrasonic dispersion machine, and performing ultrasonic treatment for 10 to 15 minutes at the normal temperature to obtain the aldehyde-removing composite coating for the artificial board.
The alkyd resin, the 2-imidazolidinone ethanol dispersion liquid, the polyethylene glycol, the glycerol, the stearamide, the 2, 4-toluene diisocyanate trimer and the butyl acetate are respectively in parts by weight: 40-60 parts of alkyd resin, 24-36 parts of 2-imidazolidinone ethanol dispersion, 2-3 parts of polyethylene glycol, 4-6 parts of glycerol, 4-6 parts of stearamide, 8-12 parts of 2, 4-toluene diisocyanate trimer and 6-9 parts of butyl acetate.
The ultrasonic power is 400-500W.
The specific preparation steps of the 2-imidazolidinone ethanol dispersion liquid are as follows:
(1) adding 2-imidazolidinone into absolute ethyl alcohol, and stirring for 30-40 min at a rotating speed of 180-200 r/min under a water bath condition of 40-50 ℃ to obtain a 2-imidazolidinone ethanol solution;
(2) adding the silver-loaded nano mixed powder into a 2-imidazolidinone ethanol solution, stirring at the normal temperature at the rotating speed of 600-800 r/min for 20-30 min, then placing in an ultrasonic dispersion machine, and performing ultrasonic treatment at the normal temperature for 40-60 min to obtain a 2-imidazolidinone ethanol dispersion liquid.
The 2-imidazolidinone, the silver-loaded nano mixed powder and the absolute ethyl alcohol are respectively in parts by weight: 20-30 parts of 2-imidazolidinone, 4-6 parts of silver-loaded nano mixed powder and 40-60 parts of absolute ethyl alcohol. The ultrasonic power is 500-600W.
The specific preparation steps of the silver-loaded nano mixed powder are as follows:
(1) adding chloroplatinic acid hexahydrate into deionized water of 3/4 mass, and stirring at the rotating speed of 120-140 r/min for 10-12 min at normal temperature to obtain a chloroplatinic acid solution;
(2) adding nano titanium dioxide and carbon nano tubes into a chloroplatinic acid solution, and stirring at the rotating speed of 300-350 r/min for 20-30 min at normal temperature to obtain a suspension;
(3) placing the suspension in an ultrasonic dispersion machine, and performing ultrasonic dispersion for 20-30 min at normal temperature to obtain dispersion liquid;
(4) adding sodium hydroxide and sodium borohydride into the residual 1/4 mass of deionized water, and stirring at the normal temperature at the rotating speed of 120-140 r/min for 10-15 min to obtain an alkaline mixed solution;
(5) adding the alkaline mixed solution into the dispersion liquid, and stirring at the rotating speed of 200-240 r/min for 4-8 hours at the temperature of 100-120 ℃ to obtain a mixed solution;
(6) and (3) placing the mixed solution in a forced air drying oven at the temperature of 80-90 ℃ for drying for 20-24 h, and cooling at normal temperature to obtain the silver-loaded nano mixed powder.
The nanometer titanium dioxide, the carbon nanometer tube, the chloroplatinic acid hexahydrate, the sodium hydroxide, the sodium borohydride and the deionized water respectively have the following weight portions: 10-20 parts of nano titanium dioxide with the average particle size of 20-40 nm, 10-20 parts of carbon nano tubes with the average particle size of 30-60 nm, 4-6 parts of chloroplatinic acid hexahydrate, 2-3 parts of sodium hydroxide, 4-6 parts of sodium borohydride and 120-160 parts of deionized water.
The power of ultrasonic dispersion is 550-650W.
Compared with other methods, the method has the beneficial technical effects that:
the invention takes nano titanium dioxide and carbon nano tubes as aldehyde removing fillers to prepare the aldehyde removing composite coating for the artificial board, the carbon nano tubes are nano materials with porous structures, and the carbon nano tubes can bind formaldehyde molecules by means of van der Waals force of surface molecules, thereby achieving the effect of absorbing formaldehyde; the forbidden band width of the nano titanium dioxide is 3.2eV, when the light with the wavelength of 387.5nm or less is irradiated, electrons on the valence band are excited to enter a conduction band, and holes are formed on the valence band. The holes and oxygen and water on the surface of the titanium dioxide form OH hydroxyl free radicals and O2-superoxide anions, the free radicals and the superoxide anions rapidly and nonselectively catalyze and degrade organic matters, and the product of photocatalytic oxidation of formaldehyde is CO2And H2O, the two products are nontoxic and environment-friendly, and have better aldehyde removal durability; the silver loaded on the surfaces of the carbon nano tube and the nano titanium dioxide can effectively improve the formaldehyde removal rate of the coating, the noble metal loaded material silver is prepared by adsorbing active oxygen by virtue of noble metal, adsorbing formaldehyde by virtue of hydroxyl on the surface of an oxide, and carrying out oxidation reaction on the active oxygen and the formaldehyde to oxidize the formaldehyde into CO2And H2O, the product is nontoxic and environment-friendly, and can have the effect of removing formaldehyde without ultraviolet irradiation, thereby effectively realizing the purification of formaldehyde.
Detailed Description
Respectively weighing 10-20 parts by weight of nano titanium dioxide with the average particle size of 20-40 nm, 10-20 parts by weight of carbon nano tube with the average particle size of 30-60 nm, 4-6 parts by weight of chloroplatinic acid hexahydrate, 2-3 parts by weight of sodium hydroxide, 4-6 parts by weight of sodium borohydride and 120-160 parts by weight of deionized water, adding the chloroplatinic acid hexahydrate into 3/4 mass of deionized water, stirring at the rotating speed of 120-140 r/min for 10-12 min at normal temperature to obtain a chloroplatinic acid solution, adding the nano titanium dioxide and the carbon nano tube into the chloroplatinic acid solution, stirring at the rotating speed of 300-350 r/min for 20-30 min at normal temperature to obtain a suspension, placing the suspension into an ultrasonic dispersion machine, ultrasonically dispersing at the power of 550-650W for 20-30 min at normal temperature to obtain a dispersion liquid, adding the sodium hydroxide and the sodium borohydride into the rest 1/4 mass of deionized water, stirring at the rotating speed of 120-140 r/min at normal, obtaining an alkaline mixed solution, adding the alkaline mixed solution into the dispersion liquid, stirring at the rotating speed of 200-240 r/min for 4-8 hours at the temperature of 100-120 ℃ to obtain a mixed solution, drying the mixed solution in a forced air drying oven at the temperature of 80-90 ℃ for 20-24 hours, and cooling at normal temperature to obtain silver-loaded nano mixed powder;
respectively weighing 20-30 parts of 2-imidazolidinone, 4-6 parts of silver-loaded nano mixed powder and 40-60 parts of absolute ethyl alcohol according to parts by weight, adding the 2-imidazolidinone into the absolute ethyl alcohol, stirring for 30-40 min at a rotating speed of 180-200 r/min under a water bath condition of 40-50 ℃ to obtain a 2-imidazolidinone ethanol solution, adding the silver-loaded nano mixed powder into the 2-imidazolidinone ethanol solution, stirring for 20-30 min at a rotating speed of 600-800 r/min at normal temperature, placing in an ultrasonic dispersion machine, and carrying out ultrasonic treatment for 40-60 min at 500-600W at normal temperature to obtain a 2-imidazolidinone ethanol dispersion liquid;
respectively weighing 40-60 parts of alkyd resin, 24-36 parts of 2-imidazolidinone ethanol dispersion, 2-3 parts of polyethylene glycol, 4-6 parts of glycerol, 4-6 parts of stearamide, 8-12 parts of 2, 4-toluene diisocyanate trimer and 6-9 parts of butyl acetate according to parts by weight, adding the 2, 4-toluene diisocyanate trimer into the butyl acetate, stirring at the normal temperature at the rotating speed of 200-250 r/min for 20-30 min to obtain a mixed curing agent, adding the alkyd resin into the 2-imidazolidinone ethanol dispersion, stirring at the normal temperature at the rotating speed of 400-500 r/min for 40-60 min to obtain a resin mixed solution, adding the mixed curing agent, the polyethylene glycol, the glycerol and the stearamide into the resin mixed solution, placing the resin mixed solution into a high-speed stirrer, stirring at the normal temperature at the rotating speed of 1000-1200 r/min for 10-20 min, and then placing the mixture in an ultrasonic dispersion machine, and carrying out ultrasonic treatment for 10-15 min at the power of 400-500W at normal temperature to obtain the aldehyde-removing composite coating for the artificial board.
Example 1
Respectively weighing 10 parts by weight of nano titanium dioxide with the average particle size of 20nm, 10 parts by weight of carbon nano tube with the average particle size of 30nm, 4 parts by weight of chloroplatinic acid hexahydrate, 2 parts by weight of sodium hydroxide, 4 parts by weight of sodium borohydride and 120 parts by weight of deionized water, adding the chloroplatinic acid hexahydrate into 3/4 mass of deionized water, stirring at the normal temperature at the rotating speed of 120r/min for 10min to obtain a chloroplatinic acid solution, adding the nano titanium dioxide and the carbon nano tube into the chloroplatinic acid solution, stirring at the normal temperature at the rotating speed of 300r/min for 20min to obtain a suspension, placing the suspension into an ultrasonic dispersion machine, ultrasonically dispersing at the normal temperature for 20min at the power of 550W to obtain a dispersion liquid, adding the sodium hydroxide and the sodium borohydride into the residual 1/4 mass of deionized water, stirring at the normal temperature at the rotating speed of 120r/min for 10min to obtain an alkaline mixed, stirring at 100 deg.C and 200r/min for 4 hr to obtain mixed solution, drying in 80 deg.C forced air drying oven for 20 hr, and cooling at room temperature to obtain silver-loaded nanometer mixed powder;
respectively weighing 20 parts of 2-imidazolidinone, 4 parts of silver-loaded nano mixed powder and 40 parts of absolute ethyl alcohol according to parts by weight, adding the 2-imidazolidinone into the absolute ethyl alcohol, stirring for 30min at a rotating speed of 180r/min under a water bath condition of 40 ℃ to obtain a 2-imidazolidinone ethanol solution, adding the silver-loaded nano mixed powder into the 2-imidazolidinone ethanol solution, stirring for 20min at a rotating speed of 600r/min at normal temperature, placing in an ultrasonic dispersion machine, and carrying out ultrasonic treatment for 40min at the normal temperature with a power of 500W to obtain a 2-imidazolidinone ethanol dispersion liquid;
respectively weighing 40 parts of alkyd resin, 24 parts of 2-imidazolidinone ethanol dispersion, 2 parts of polyethylene glycol, 4 parts of glycerol, 4 parts of stearamide, 8 parts of 2, 4-toluene diisocyanate trimer and 6 parts of butyl acetate according to parts by weight, adding the 2, 4-toluene diisocyanate trimer into the butyl acetate, stirring at normal temperature at a rotation speed of 200r/min for 20min to obtain a mixed curing agent, adding the alkyd resin into the 2-imidazolidinone ethanol dispersion liquid, stirring at normal temperature at a rotation speed of 400r/min for 40min to obtain a resin mixed solution, adding a mixed curing agent, polyethylene glycol, glycerol and stearamide into the resin mixed solution, placing in a high-speed stirrer, stirring at 1000r/min for 10min at normal temperature, placing in an ultrasonic dispersion machine, and (3) carrying out ultrasonic treatment at the normal temperature for 10min at the power of 400W to obtain the aldehyde-removing composite coating for the artificial board.
Example 2
Respectively weighing 15 parts by weight of nano titanium dioxide with the average particle size of 30nm, 15 parts by weight of carbon nano tubes with the average particle size of 45nm, 5 parts by weight of chloroplatinic acid hexahydrate, 2.5 parts by weight of sodium hydroxide, 5 parts by weight of sodium borohydride and 140 parts by weight of deionized water, adding the chloroplatinic acid hexahydrate into 3/4 mass parts of deionized water, stirring at the rotating speed of 130r/min for 11min at normal temperature to obtain a chloroplatinic acid solution, adding the nano titanium dioxide and the carbon nano tubes into the chloroplatinic acid solution, stirring at the rotating speed of 325r/min for 25min at normal temperature to obtain a suspension, placing the suspension into an ultrasonic dispersion machine, ultrasonically dispersing at the power of 600W for 25min at normal temperature to obtain a dispersion liquid, adding the sodium hydroxide and the sodium borohydride into the residual 1/4 mass parts of deionized water, stirring at the rotating speed of 130r/min at normal temperature for 12.5min to obtain an alkaline mixed solution, adding, stirring at 110 deg.C at a speed of 220r/min for 6h to obtain mixed solution, drying in 85 deg.C forced air drying oven for 22h, and cooling at room temperature to obtain silver-loaded nanometer mixed powder;
respectively weighing 25 parts of 2-imidazolidinone, 5 parts of silver-loaded nano mixed powder and 50 parts of absolute ethyl alcohol according to parts by weight, adding the 2-imidazolidinone into the absolute ethyl alcohol, stirring for 35min at the rotation speed of 190r/min under the water bath condition of 45 ℃ to obtain a 2-imidazolidinone ethanol solution, adding the silver-loaded nano mixed powder into the 2-imidazolidinone ethanol solution, stirring for 25min at the rotation speed of 700r/min at normal temperature, placing in an ultrasonic dispersion machine, and performing ultrasonic treatment for 50min at the power of 550W at normal temperature to obtain a 2-imidazolidinone ethanol dispersion liquid;
respectively weighing 50 parts of alkyd resin, 30 parts of 2-imidazolidinone ethanol dispersion, 2.5 parts of polyethylene glycol, 5 parts of glycerol, 5 parts of stearamide, 10 parts of 2, 4-toluene diisocyanate trimer and 7.5 parts of butyl acetate according to parts by weight, adding the 2, 4-toluene diisocyanate trimer into the butyl acetate, stirring at normal temperature at 225r/min for 25min to obtain mixed curing agent, adding alkyd resin into 2-imidazolidinone ethanol dispersion, stirring at normal temperature at a rotation speed of 450r/min for 50min to obtain a resin mixed solution, adding a mixed curing agent, polyethylene glycol, glycerol and stearamide into the resin mixed solution, placing in a high speed stirrer, stirring at 1100r/min for 15min at normal temperature, placing in an ultrasonic dispersion machine, and carrying out ultrasonic treatment at the power of 450W for 12.5min at normal temperature to obtain the aldehyde-removing composite coating for the artificial board.
Example 3
Respectively weighing 20 parts by weight of nano titanium dioxide with the average particle size of 40nm, 20 parts by weight of carbon nano tube with the average particle size of 60nm, 6 parts by weight of chloroplatinic acid hexahydrate, 3 parts by weight of sodium hydroxide, 6 parts by weight of sodium borohydride and 160 parts by weight of deionized water, adding the chloroplatinic acid hexahydrate into 3/4 parts by weight of deionized water, stirring at the normal temperature at the rotating speed of 140r/min for 12min to obtain a chloroplatinic acid solution, adding the nano titanium dioxide and the carbon nano tube into the chloroplatinic acid solution, stirring at the normal temperature at the rotating speed of 350r/min for 30min to obtain a suspension, placing the suspension into an ultrasonic dispersion machine, ultrasonically dispersing at the normal temperature for 30min at the power of 650W to obtain a dispersion liquid, adding the sodium hydroxide and the sodium borohydride into the residual 1/4 parts by weight of deionized water, stirring at the normal temperature at the rotating speed of 140r/min for 15min to, stirring at 120 deg.C at a rotation speed of 240r/min for 8h to obtain mixed solution, drying in 90 deg.C forced air drying oven for 24h, and cooling at room temperature to obtain silver-loaded nanometer mixed powder;
respectively weighing 30 parts of 2-imidazolidinone, 6 parts of silver-loaded nano mixed powder and 60 parts of absolute ethyl alcohol according to parts by weight, adding the 2-imidazolidinone into the absolute ethyl alcohol, stirring for 40min at a rotating speed of 180-200 r/min under a water bath condition of 50 ℃ to obtain a 2-imidazolidinone ethanol solution, adding the silver-loaded nano mixed powder into the 2-imidazolidinone ethanol solution, stirring for 30min at a rotating speed of 800r/min at normal temperature, placing in an ultrasonic dispersion machine, and carrying out ultrasonic treatment for 60min at 600W power at normal temperature to obtain a 2-imidazolidinone ethanol dispersion liquid;
respectively weighing 60 parts of alkyd resin, 36 parts of 2-imidazolidinone ethanol dispersion, 3 parts of polyethylene glycol, 6 parts of glycerol, 6 parts of stearamide, 12 parts of 2, 4-toluene diisocyanate trimer and 9 parts of butyl acetate according to parts by weight, adding the 2, 4-toluene diisocyanate trimer into the butyl acetate, stirring at 250r/min for 30min at normal temperature to obtain mixed curing agent, adding alkyd resin into 2-imidazolidinone ethanol dispersion, stirring at normal temperature at a rotation speed of 500r/min for 60min to obtain a resin mixed solution, adding a mixed curing agent, polyethylene glycol, glycerol and stearamide into the resin mixed solution, placing in a high speed stirrer, stirring at 1200r/min for 20min at normal temperature, placing in an ultrasonic dispersion machine, and carrying out ultrasonic treatment at the normal temperature for 15min at the power of 500W to obtain the aldehyde-removing composite coating for the artificial board.
Comparative example: wood board paint produced by Zhejiang company.
The aldehyde-removing composite coating prepared in the embodiment and a control example are detected, and the specific detection is as follows:
aldehyde removal performance: the experiment is carried out by referring to JC/T1074-2008 indoor air purification function coating material purification performance. The experimental device is a glass experimental cabin with the volume of 1m3, and the inner wall of the experimental cabin is 1250mm long, 800mm wide and 1000mm high. The cabin body is sealed, and a low-power fan is arranged in the cabin body and used for homogenizing air in the cabin. The test chamber is provided with a stainless steel sample holder in the length direction for holding a sample plate, wherein the sample plate is arranged at an angle of 30 degrees with the chamber wall, and the sample plate is 300mm away from the chamber bottom. In the preparation of the sample plate, the paint sample was uniformly brushed on 4 glass plates of 500mm × 500mm in a brushing amount of 150g/m2, and the test was conducted after natural drying for 7 d.
Film hardness: the test is carried out according to the method in GB/T6729-2006 determination of paint film hardness by pencil method. The sample plate to be tested is placed on a horizontal desktop, and a pencil is pushed to move on the paint film. The pencil was fixed to a pencil hardness tester and pressed down at an angle of 45 ° against the paint film surface. In the test, the pencil hardness of the paint film was represented by the hardest pencil hardness at which the paint film did not develop scratches of 3mm or more, by gradually increasing the pencil hardness from 4B to H by pushing a distance of 7mm at a speed of 1 mm/s.
The specific test results are shown in table 1.
Table 1 comparative table of property characterization
| Detecting items | Example 1 | Example 2 | Example 3 | Comparative example |
| Removal of formaldehyde rate/%) | 80 | 82 | 78 | 24 |
| Hardness of | HB | HB | HB | F |
As can be seen from Table 1, the aldehyde-removing composite coating for artificial boards prepared by the invention has good hardness and formaldehyde removal rate.
Claims (9)
1. A preparation method of aldehyde-removing composite coating for artificial boards is characterized by comprising the following specific preparation steps:
(1) adding 2, 4-toluene diisocyanate trimer into butyl acetate, and stirring at the rotating speed of 200-250 r/min for 20-30 min at normal temperature to obtain a mixed curing agent;
(2) adding alkyd resin into 2-imidazolidinone ethanol dispersion, and stirring at the rotating speed of 400-500 r/min for 40-60 min at normal temperature to obtain resin mixed solution;
(3) adding the mixed curing agent, polyethylene glycol, glycerol and stearamide into the resin mixed solution, placing the mixture into a high-speed stirrer, stirring the mixture for 10 to 20 minutes at the normal temperature at the rotating speed of 1000 to 1200r/min, then placing the mixture into an ultrasonic dispersion machine, and performing ultrasonic treatment for 10 to 15 minutes at the normal temperature to obtain the aldehyde-removing composite coating for the artificial board.
2. The preparation method of the aldehyde-removing composite coating for the artificial board according to claim 1, wherein the weight parts of the alkyd resin, the 2-imidazolidinone ethanol dispersion, the polyethylene glycol, the glycerol, the stearamide, the 2, 4-toluene diisocyanate trimer and the butyl acetate are respectively 40-60 parts of the alkyd resin, 24-36 parts of the 2-imidazolidinone ethanol dispersion, 2-3 parts of the polyethylene glycol, 4-6 parts of the glycerol, 4-6 parts of the stearamide, 8-12 parts of the 2, 4-toluene diisocyanate trimer and 6-9 parts of the butyl acetate.
3. The preparation method of the aldehyde-removing composite coating for the artificial board as claimed in claim 1, wherein the ultrasonic power in the step (3) is 400-500W.
4. The preparation method of the aldehyde-removing composite coating for the artificial board according to claim 1, wherein the specific preparation steps of the 2-imidazolidinone ethanol dispersion liquid in the step (2) are as follows:
(1) adding 2-imidazolidinone into absolute ethyl alcohol, and stirring for 30-40 min at a rotating speed of 180-200 r/min under a water bath condition of 40-50 ℃ to obtain a 2-imidazolidinone ethanol solution;
(2) adding the silver-loaded nano mixed powder into a 2-imidazolidinone ethanol solution, stirring at the normal temperature at the rotating speed of 600-800 r/min for 20-30 min, then placing in an ultrasonic dispersion machine, and performing ultrasonic treatment at the normal temperature for 40-60 min to obtain a 2-imidazolidinone ethanol dispersion liquid.
5. The preparation method of the aldehyde-removing composite coating for the artificial board according to claim 4, wherein the weight parts of the 2-imidazolidinone, the silver-loaded nano mixed powder and the absolute ethyl alcohol are respectively 20-30 parts of the 2-imidazolidinone, 4-6 parts of the silver-loaded nano mixed powder and 40-60 parts of the absolute ethyl alcohol.
6. The preparation method of the aldehyde-removing composite coating for the artificial board as claimed in claim 4, wherein the ultrasonic power in the step (2) is 500-600W.
7. The preparation method of the aldehyde-removing composite coating for artificial boards as claimed in claim 4, wherein the specific preparation steps of the silver-loaded nano mixed powder in step (2) are as follows:
(1) adding chloroplatinic acid hexahydrate into deionized water of 3/4 mass, and stirring at the rotating speed of 120-140 r/min for 10-12 min at normal temperature to obtain a chloroplatinic acid solution;
(2) adding nano titanium dioxide and carbon nano tubes into a chloroplatinic acid solution, and stirring at the rotating speed of 300-350 r/min for 20-30 min at normal temperature to obtain a suspension;
(3) placing the suspension in an ultrasonic dispersion machine, and performing ultrasonic dispersion for 20-30 min at normal temperature to obtain dispersion liquid;
(4) adding sodium hydroxide and sodium borohydride into the residual 1/4 mass of deionized water, and stirring at the normal temperature at the rotating speed of 120-140 r/min for 10-15 min to obtain an alkaline mixed solution;
(5) adding the alkaline mixed solution into the dispersion liquid, and stirring at the rotating speed of 200-240 r/min for 4-8 hours at the temperature of 100-120 ℃ to obtain a mixed solution;
(6) and (3) placing the mixed solution in a forced air drying oven at the temperature of 80-90 ℃ for drying for 20-24 h, and cooling at normal temperature to obtain the silver-loaded nano mixed powder.
8. The preparation method of the aldehyde-removing composite coating for the artificial board as claimed in claim 7, wherein the weight parts of the nano titanium dioxide, the carbon nano tube, the chloroplatinic acid hexahydrate, the sodium hydroxide, the sodium borohydride and the deionized water are respectively 10-20 parts of the nano titanium dioxide with the average particle size of 20-40 nm, 10-20 parts of the carbon nano tube with the average particle size of 30-60 nm, 4-6 parts of the chloroplatinic acid hexahydrate, 2-3 parts of the sodium hydroxide, 4-6 parts of the sodium borohydride and 120-160 parts of the deionized water.
9. The preparation method of the aldehyde-removing composite coating for the artificial board as claimed in claim 7, wherein the power of the ultrasonic dispersion in the step (3) is 550-650W.
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| CN103897567A (en) * | 2014-03-06 | 2014-07-02 | 华南理工大学 | Wood lacquer for purifying formaldehyde and preparation method thereof |
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