A kind of light catalyzed coating and preparation method thereofTechnical field
The present invention relates to catalysis material technical fields more particularly to a kind of light catalyzed coating and preparation method thereof.
Background technique
With the continuous improvement of people's living standards, house or interior decoration start to become to become increasingly complex with it is luxurious.It in the process, can be generally using materials such as paint, artificial hard board and binders.
These finishing materials can discharge a large amount of volatile organic matters, cause room air pollution, cause respiratory disease, veryTo being the serious diseases such as pulmonary infection or leukaemia.Therefore, how effective solution air pollution problem inside rooms become peopleFocus of attention, and thus emerged many different types of purifications and clean technologies.
In these purifications and clean technologies, based on the photocatalysis technology of solar energy, low energy consumption with it, the spies such as environmental-friendlyIt puts and has been a great deal of attention.
The principle of photocatalysis technology is: some specific catalysis materials can be excited under illumination condition, generationLight induced electron and photohole then form the extremely strong superoxide radical of oxidizing force and hydroxyl with oxygen in air and water molecule reactionBase free radical.These substances can be with indoor air pollutants and the liquid phases such as dyestuff, organic nitrogen, organic phosphorus such as formaldehyde, benzene, TVOCRedox reaction occurs for organic pollutant, hazardous air pollutants is degraded to innocuous substance, to play degradation of contaminantEffect, realize purification air purpose.
In the implementation of the present invention, it is found by the applicant that following problem exists in the prior art: existing photocatalysis materialExpect that the application effect in terms of air cleaning indoors is unsatisfactory.On the one hand, traditional catalysis material (such as TiO2) need to makeIt is acted on ultraviolet excitation competence exertion.It is low by ultraviolet light energy shared in visible light, damage is be easy to cause to human healthHarmful limitation, application effect are bad.
On the other hand, catalysis material is usually powdered or block-like solid.Its longer air that is relatively hard to keepClarification time or the entire interior space of covering.
Summary of the invention
Place in view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of light catalyzed coating and its preparationsMethod, it is intended to solve the problems, such as that existing catalysis material practical application effect is undesirable.
In order to achieve the above object, first aspect of the embodiment of the present invention provides a kind of light catalyzed coating.Wherein, by quality hundredScore calculates, and the light catalyzed coating includes the following raw material component:
Optionally, the auxiliary agent is selected from coalescing agent, dispersing agent, stabilizer, lubricant, defoaming agent, levelling agent, thickeningOne or more of agent, curing agent and crosslinking agent.
Optionally, it calculates by mass percentage, the light catalyzed coating includes the following raw material component:
Optionally, the filler includes calcium carbonate and silica.
Optionally, the water-based emulsion is aqueous silicone acrylic emulsion, waterborne styrene-acrylic emulsion or polyaminoester emulsion.
Optionally, the catalysis material be selected from nano nonmetal catalysis material, nonmetal doping catalysis material withAnd one or more of nonmetallic composite photocatalyst material；
The nano nonmetal catalysis material includes one or more of carbonitride and boron nitride；It is described nonmetallicDoping catalysis material includes carbon doping one or more of catalysis material and N doping catalysis material；The non-goldBelonging to composite photocatalyst material includes C3N4- graphene composite material and C3N4-SiO2One or more of composite material.
Optionally, the solvent is aqueous solvent.
The second aspect of the embodiment of the present invention additionally provides a kind of preparation method of light catalyzed coating.Wherein, the preparationMethod includes the following steps:
According to above-mentioned mass percent, by catalysis material, water-based emulsion, stabilizer, dispersing agent and coalescing agentIt is uniformly mixed and disperses, prepare photocatalysis dispersion emulsion；
According to above-mentioned mass percent, levelling agent, thickener and defoaming agent are added in water and stirs, preparation dilution is moltenLiquid；
The photocatalysis dispersion emulsion is mixed with the dilute solution, prepares the light catalyzed coating.
Optionally, the preparation photocatalysis dispersion emulsion, is specifically included: being ground using sand mill or ball mill,And under setting speed, disperse scheduled jitter time to prepare the photocatalysis dispersion emulsion.
Optionally, it is described prepare the light catalyzed coating include: the photocatalysis dispersion emulsion be added it is described dilution it is moltenIt is stirred while liquid；After the smooth dispersion emulsion is added, continue to stir preset mixing time described to prepareLight catalyzed coating.
Light catalyzed coating provided in an embodiment of the present invention is organic by catalysis material and the common coating of indoor wall decorationIn conjunction with.Its coating formed after brushing has biggish specific surface area, can provide stable and efficient photocatalytic activity, fromAnd effectively improve practical application effect when catalysis material air cleaning indoors.
In addition, the mild condition of the preparation method of the light catalyzed coating, realization step are simple, photocatalytic activity is excellent, realExisting low in cost, simple production process is controllable, is convenient for large-scale industrial production, is with a wide range of applications, environmental-protection section barExpect preparation light catalyzed coating, be it is environmentally friendly, can be widely applied for the surface of different substrate materials, such as: metal, modelingMaterial, cement wall, plant protection, ceramic material etc. are also applied for different scenes, such as: wall, external wall, outdoor within doorsRoad, underground parking, charge station etc..
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorysThe bright restriction not constituted to embodiment, the element in attached drawing with same reference numbers label are expressed as similar element.It removesNon- to have special statement, composition does not limit the figure in attached drawing.
Fig. 1 is the method flow diagram of the preparation method of the light catalyzed coating of the specific embodiment of the invention.
Specific embodiment
To make the purpose of the present invention, technical solution and effect clearer, clear and definite, right as follows in conjunction with drawings and embodimentsThe present invention is further described.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used toLimit the present invention.
The numerical value disclosed in the embodiment of the present invention is approximation, and and non-determined value.Allow in error or experiment conditionIn the case where, it may include all values in error range and be not limited to specific value disclosed in the embodiment of the present invention.
The numberical range disclosed in the embodiment of the present invention is for indicating the relative quantity of component in the mixture and its other partyThe range of the temperature or other parameters enumerated in method embodiment.One or more numerical point in the numberical range is appropriateUnder conditions of obtain.
Coating is raw material very common during one kind is fitted up indoors.It can brush the table in interior spaces such as metopesFace forms corresponding coating to provide corresponding decorative effect.Based on widely applied characteristic, the present embodiment possessed by coatingProvide a kind of coating with air-cleaning function.It is added to additional photocatalysis material on the basis of common coatingMaterial, makes it have photocatalytic activity, and the coating of formation can continue and effectively carry out air cleaning.
In the present embodiment, it calculates by mass percentage, the light catalyzed coating includes the following raw material component:
Wherein, water-based emulsion is the aqueous high molecular solution with good environmental-protecting performance.Its base as light catalyzed coatingPlinth substance, the anti-scratch equal use function having to provide coating.
Specifically, the water-based emulsion can be any suitable type, after the water-base resin dissolution that can satisfy use demandThe dispersion of generation, such as aqueous silicone acrylic emulsion, waterborne styrene-acrylic emulsion or polyaminoester emulsion.
Filler is the solid particulate matter for shading, dyeing or adjustment processing performance etc..In some embodiments, describedFiller can choose the mixture using calcium carbonate and silica.It is of course also possible to according to the needs of actual conditions, add itThe filler of his type.Solvent is the liquid for dissolving above-mentioned raw materials component.In the present embodiment, it can simply select to make using waterFor solvent.
Auxiliary agent is incorporated into coating, and based on physics, perhaps chemical action promotes the processing performance or usability of coatingThe substance of energy etc..In some embodiments, the auxiliary agent may include dispersing agent, stabilizer, defoaming agent, thickener, crosslinking agentEqual function additives.
Specifically, technical staff can select the catalysis material of suitable type according to the needs of actual conditions, including butIt is not limited to nano nonmetal catalysis material, nonmetal doping catalysis material, nonmetallic composite photocatalyst material.The nanometerNon-metal optical catalysis material includes one or more of carbonitride and boron nitride；The nonmetal doping catalysis material packetInclude carbon doping one or more of catalysis material and N doping catalysis material；The nonmetallic composite photocatalyst materialIncluding one or more of C3N4- graphene composite material and C3N4-SiO2 composite material.
Due to traditional catalysis material (such as TiO2) ultraviolet light has ultraviolet ray intensity and illumination condition to exciteSpecial requirement, and ultraviolet light only accounts for 4% or so of solar energy, and certain damage can be caused to human health, it can notProlonged irradiation.
Therefore, in the preferred embodiment, which can choose using with visible light-responded photocatalysisNano material, the coating that coating is formed keep stable and efficient photocatalytic activity, air pollutants removal rateHigher (visible light (400~750nm) then accounts for the 43% of solar energy).
The embodiment of the present invention combines catalysis material with Environmental Protective Water-paint, obtains the water with air-cleaning functionProperty environmental protection coating material.The use demand of itself and interior decoration is mutually agreed with, and has boundless market and application prospect.Moreover, choosingWith the photocatalysis nano material of visible light catalytic, can have efficient and stable photocatalysis, sky in visible-rangeGas purification and anti-microbial property.
Fig. 1 is the method flow diagram of the light catalyzed coating preparation method of the embodiment of the present invention.As shown in Figure 1, the preparation sideMethod includes the following steps:
110, it is calculated in mass percent, by the catalysis material of 5%-15%, the water-based emulsion of 20%-50%, 0.4%-The coalescing agent of 1.6% stabilizer, the dispersing agent of 2%-8% and 0.5%-1% mixes, and prepares photocatalysis dispersion emulsion.
Specifically, mixture after mixing can be ground on sand mill or ball mill, and turn in settingHigh speed dispersion is carried out under fast (such as 1000-5000rpm) to prepare the photocatalysis dispersion emulsion.
Carry out high speed dispersion specifically required for the time can determine according to the actual situation, such as 1-1.5 hours with trueIt protects and obtains good dispersion effect, form stable emulsion dispersion system.It is amazing to be, the catalysis material, dispersionAgent and water-based emulsion are using the balance between above-mentioned suitable ratio acquirement catalysis material concentration and good dispersion, to obtainObtain optimal using effect.
120, suitable levelling agent, thickener and defoaming agent are added in water and stirs, prepares dilute solution.
Specifically, calculated according to mass percent, when preparing dilute solution, above-mentioned levelling agent, thickener and defoaming agentAdditional amount can according to need, control between 0.5%-1%.
130, the photocatalysis dispersion emulsion is mixed with the dilute solution, prepares the light catalyzed coating.
According to suitable ratio, the photocatalysis dispersion emulsion that step 110 prepares is carried out using dilute solution abundantAfter dilution, the light catalyzed coating can be prepared for interior decoration.
Specifically, in order to guarantee that dilute solution and photocatalysis dispersion emulsion can be stirred evenly and be sufficiently mixed, on the one handThe addition speed that can control the photocatalysis dispersion emulsion enables it be slowly added into dilution with the speed lower than specific threshold valueIn solution.
On the other hand, it can also be stirred while the dilute solution is added in the photocatalysis dispersion emulsion, andAnd after the smooth dispersion emulsion is added, continue to stir preset mixing time to prepare the light catalyzed coating.
Specific mixing time can be determined according to the actual situation by technical staff, it is only necessary to be can satisfy and be sufficiently mixedUniformly need.For example, mixing time can be controlled at 1-2 hours.
Preparation method provided in an embodiment of the present invention has reaction condition mild, simple process, the photocatalytic activity of productExcellent, low in cost, simple production process is easily-controllable and the advantages of being easy to implement industrialized production, and it is net to can be widely applied for airChange field, especially Environmental Protective Water-paint field, ep-type material preparation light catalyzed coating, be it is environmentally friendly, canExtensively, for example applied to the surface of different substrate materials: metal, plastics, cement wall, plant protection, ceramic material etc. are also applied forDifferent scenes, such as: wall, external wall, outdoor road, underground parking, charge station etc. within doors.
Based on preparation method shown in FIG. 1, with the present invention will be described in detail, embodiment provides several specific examples presented belowLight catalyzed coating preparation method.
Embodiment 1:
1) it calculates by mass percentage, the raw material composition of light catalyzed coating are as follows:
Surplus is aqueous solvent.
2) preparation process:
Firstly, by 6% catalysis material, 30% water-based emulsion, 1% stabilizer, 2% dispersing agent, 0.5%Coalescing agent and 0.5% binder be uniformly mixed, ground using ball mill or sand mill, under 5000rpm high speedAfter dispersion 1 hour, photocatalysis dispersion liquid is made.
Secondly, 0.5% thickener, 0.5% levelling agent and 0.5% defoaming agent and high-speed stirred 0.5 are added in waterAfter hour, dilute solution is made.
Finally, stirring while photocatalysis dispersion liquid is slowly added to dilute solution, and photocatalysis dispersion liquid is being addedAfter, continue stirring 1 hour, mixes them thoroughly to obtain the light catalyzed coating.
3) purifying property is tested:
Firstly, the light catalyzed coating prepared is coated in transparent glass plate surface.Then, the photocatalysis is waited to applyMaterial is completely dried, and forms corresponding coating.Finally, carrying out nitrogen oxides test to coating.
After 24 hours, the test result of coating is shown, 24 hours Degradation Formaldehyde rates of the coating formed after dry are96.7%, 24 hours TVOC degradation rates are 96%.
The light catalyzed coating that the embodiment of the present invention obtains has excellent air cleaning performance, and the light catalyzed coating of acquisition is answeredFor the surfaces (metal, plastics, cement wall, plant protection, ceramic material etc.) of different substrate materials, different scenes (within doors wall,External wall, outdoor road, underground parking, charge station etc.).
Embodiment 2:
1) it calculates by mass percentage, the raw material composition of light catalyzed coating are as follows:
Surplus is aqueous solvent.
2) preparation process:
Firstly, by 10% catalysis material, 30% water-based emulsion, 1% stabilizer, 2.5% dispersing agent, 1%Coalescing agent and 0.5% binder be uniformly mixed, ground using ball mill or sand mill, under 5000rpm high speedAfter dispersion 1 hour, photocatalysis dispersion liquid is made.
Secondly, in water be added 0.5% binder, 0.5% defoaming agent and 0.5% levelling agent and high-speed stirredAfter 0.5 hour, dilute solution is made.
Finally, stirring while photocatalysis dispersion liquid is slowly added to dilute solution, and be added in photocatalysis dispersion liquidAfter, continue stirring 1 hour, mixes them thoroughly to obtain the light catalyzed coating.
3) purifying property is tested:
Firstly, the light catalyzed coating prepared is coated in transparent glass plate surface.Then, the photocatalysis is waited to applyMaterial is completely dried, and forms corresponding coating.Finally, carrying out nitrogen oxides test to coating.
After 24 hours, the test result of coating is shown, 24 hours Degradation Formaldehyde rates of the coating formed after dry are95%.
The purifying property of the light catalyzed coating that the embodiment of the present invention obtains excellent formaldehyde and nitrogen oxides, coating adapt to useIn the surfaces (metal, plastics, cement wall, plant protection, ceramic material etc.) of different substrate materials, different scenes (within doors wall, buildBuild exterior wall, outdoor road, underground parking, charge station etc.).
Embodiment 3:
1) it calculates by mass percentage, the raw material composition of light catalyzed coating are as follows:
Surplus is aqueous solvent.
2) preparation process:
Firstly, by 10% catalysis material, 30% water-based emulsion, 1% stabilizer, 2% dispersing agent, 0.5%Coalescing agent and 0.5% binder be uniformly mixed, ground using ball mill or sand mill, under 5000rpm high speedAfter dispersion 1 hour, photocatalysis dispersion liquid is made.
Secondly, according to the above ratio, 0.5% binder, 0.5% thickener and 5% filler and high are added in waterAfter speed stirring 0.5 hour, dilute solution is made.
3) purifying property is tested:
Firstly, dilute solution is coated uniformly on transparent glass plate surface, dried for standby.Then, continue after the dryingTransparent glass plate surface uniformly coats the photocatalysis dispersion liquid prepared, and corresponding coating is formed after it is completely dried.MostAfterwards, nitrogen oxides test is carried out to coating.
After 24 hours, the test result of coating is shown, 24 hours Degradation Formaldehyde rates of the coating formed after dry are94%.
The pollutant purifications performances such as the excellent formaldehyde of the light catalyzed coating that the embodiment of the present invention obtains, and have silicaAs protection shell, substrate damage is prevented, coating is applied to surface (metal, plastics, cement wall, the plant guarantor of different substrate materialsShield, ceramic material etc.), different scenes (wall, external wall, outdoor road, underground parking, charge station etc. within doors).
The preparation condition of preparation method provided in an embodiment of the present invention is mild, and simply, photocatalytic activity is excellent, it can be achieved that bigTechnical scale metaplasia produces, and can be widely applied for air purification field.Moreover, showing photocatalysis by nitrogen oxides test resultCoating PARA FORMALDEHYDE PRILLS(91,95), TVOC and nitrogen oxides etc. have preferable removal rate.
In conclusion the light catalyzed coating has excellent photocatalytic activity, good photochemical stability and higherThermal stability is applied conducive in actually finishing.It combines Environmental Protective Water-paint with catalysis material, can be large-scaleIt is used in fitment process, to improve the application effect in catalysis material air cleaning indoors well.
It, can according to the technique and scheme of the present invention and this hair it is understood that for those of ordinary skillsBright design is subject to equivalent substitution or change, and all these changes or replacement all should belong to the guarantor of appended claims of the inventionProtect range.