CN101413212A - Method for preparing air self-purifying function fabric of photochemical catalyst coating - Google Patents
Method for preparing air self-purifying function fabric of photochemical catalyst coating Download PDFInfo
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- CN101413212A CN101413212A CNA2008102034971A CN200810203497A CN101413212A CN 101413212 A CN101413212 A CN 101413212A CN A2008102034971 A CNA2008102034971 A CN A2008102034971A CN 200810203497 A CN200810203497 A CN 200810203497A CN 101413212 A CN101413212 A CN 101413212A
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Abstract
The invention relates to a method for preparing air auto-purification functional fabrics with a photocatalyzed coating, which comprises the following steps: firstly, a base cloth is subjected to surface treatment by an organic solution at a temperature of between 60 and 70 DEG C; secondly, deionized water, methanol and ether are taken as dispersing reagent of a fiber protecting agent, the pH value of the dispersing protecting agent is adjusted to between 9.5 and 11.5 by ammonia, and the base cloth is immersed in the dispersing protecting agent for more than 6 to 8 hours at a temperature of between 30 and 40 DEG C; thirdly, the base cloth is treated for 10 to 15 minutes by an ethylenediaminetetraacetic acid and a phytate aqueous solution; and fourthly, photocatalyst is added in a coating agent, and the coating agent is then directly coated on the base cloth by a scraper with the coating amount between 6 and 15 grams per square meter, and dried for 2 to 4 minutes at a temperature of between 110 and 120 DEG C to obtain the air auto-purification functional fabrics. The air auto-purification functional fabrics have good air purification effect; the preparation technology is simple; and the method is easy to operate and is used for industrial mass production.
Description
Technical field
The invention belongs to the preparation field of air self-purifying function fabric, particularly relate to a kind of preparation method of air self-purifying function fabric of photochemical catalyst coating.
Background technology
In recent years, along with growth in the living standard, it is indoor that a large amount of new decorative materials, furniture and daily necessities are constantly advanced the people, and the indoor environmental pollution that causes thus also is on the rise.At the room air pollution that is on the rise, the scientific research personnel actively throws the control of people's room air pollution and purifies among the research work, has emerged a large amount of indoor air purification technology and Related product.Multiple material for air purification is developed and developed to numerous researchers in succession, wherein the material for air purification based on photocatalysis technology is the response characteristic of inorganic molecules end product with its high photocatalytic degradation activity and degree of depth mineralising to the organic gas pollutant, become a class that receives much concern in numerous new type purification materials, practical product of some of this section bar material such as photocatalysis air purifying device, self-cleaning coating, automatically cleaning ceramic tile etc. are released on market.
At present, the material that is used for air cleaning mainly is to adopt the titanium dioxide superfine powder to place in the purification channel that wire netting and filter cloth form or with binding agent titania powder to be fixed in carriers such as glass, pottery, realizes the purification to air.Because indoor air pollutants concentration is generally all very low, powder TiO
2Adsorptivity own is poor, and reaction efficiency is not high when handling the low concentration system.For addressing these problems, select for use adsorbability material to make carrier (as active carbon) load TiO
2, by the suction-operated of adsorptive support, at TiO
2Form a relative pollutant high concentration environment on every side, but these adsorptive supports itself also are powders mostly, load TiO
2After obtain supported catalyst and be still powder, can produce dust pollution when in gassy system, using, be not suitable for room air and handle.So in actual use need load again on supporter or in the Photoreactor.And present load more generally all is simple bonding, and is very effective at short notice, but UV-irradiation can make bonding agent self decompose under the effect of photochemical catalyst for a long time, causes catalyst to come off and impact effect.
Summary of the invention
Technical problem to be solved by this invention provides a kind of preparation method of air self-purifying function fabric of photochemical catalyst coating, air self-purifying function fabric good air purification effect of the present invention, preparation technology is simple, easy operating, both can also can be used for industrial-scale production in laboratory operation.
The preparation method of a kind of air self-purifying function fabric of photochemical catalyst coating of the present invention comprises:
(1) under 60～70 ℃, clean base cloth surface 20～40min with organic solution with ultrasonic wave, with boiling water washing 2～4 times, house detergent washing 1～3 time, oven dry;
(2) with deionized water, methyl alcohol and ether be 7～10:16～20:10～12 configurations by volume, as the protectant dispersion reagent of fiber, form and disperse the protection system, regulate the pH value of dispersion protection system in 9.5～11.5 scopes with ammoniacal liquor, in 20～30 ℃ of 15～25min that in ultrasonic cleaner, vibrate, make it to be uniformly dispersed, to soak more than 6～8h in the dispersion protection system of base cloth about 30～40 ℃ again, make fully absorption between the two, with the fiber protective agent of mechanical deposit on the distilled water flush away base cloth, make through baking that fiber mutually combines on fiber protective agent and the base cloth then;
(3) at room temperature with base cloth, be that 1%～3% ethylenediamine tetra-acetic acid and mass percent concentration are 2%～6% the phytic acid aqueous solution with mass percent concentration, handled 10～15 minutes;
(4) add photochemical catalyst in coating agent, directly be coated on the base cloth with scraper, coating weight is 6～15g/m
2, 110 ℃～120 ℃ oven dry 2～4min obtain air self-purifying function fabric.
Described base cloth is non-weaving cloth, woven cloth or knitted cloth, and its density is 0.20～0.30g/cm
3
The fiber of described base cloth is selected from one or both the mixture in cotton fiber, polyimide fiber, polyester fiber, polypropylene fibre, the nylon fibre, and the line density of fiber is 1.8～3.0dtex;
Organic solution in the described step (1) is 0.3～0.5g/l ethanol, 0.05～0.15g/l acetone, 0.2～0.4g/l oxalic acid or 0.3～0.5g/l chloroform;
Fiber protective agent in the described step (2) is vinyltriethoxysilane, gamma-aminopropyl-triethoxy-silane, γ glycidoxy-propyltrimethoxy silane, gamma-methyl allyl acyloxypropyl trimethoxysilane, γ-mercaptopropyl trimethoxysilane, dimethyl silicone polymer, contains 2,4-hexafluoroethylene methyl siloxane, polyvinylidene fluoride or hydroxy phosphorus Calx;
The photochemical catalyst of described step (4) is the porous type nano metal particles of silver and iron composite doping modification, silver and aluminium composite doping modification or lanthanum and iron composite doping modification, and its aperture is 6～16nm;
Described nano metal particles is selected from TiO
2, CdS, ZnS, WO
3, SnO
2, V
2O
5, one or both the mixture among the BiVO4, the particle diameter of metal nanoparticle is 6～90nm;
The coating agent of described step (4) is the mixture of silicone, solvent type polyacrylate, solvent, catalyst and dispersant, and its mass ratio is followed successively by 4～6:8～10:10～16:3～5:2～4;
Described dispersant is the compound of poly(silicon aether) type surfactant and organosilicon-modified polyvinyl surfactant, and the mass ratio of compound is 1:3～3:5;
Described catalyst is ammonium nitrate, ammonium sulfate, ammonium phosphate, ammonium carbonate, ammonium dihydrogen phosphate (ADP) or ammonium chloride;
Described solvent is the mixture of water and ether, and its mass ratio is 3:1～5:1.
The present invention is fixed in semi-conductor nano particles on the fabric, has both solved the dust pollution question of photochemical catalyst when air cleaning, can avoid the degraded of photochemical catalyst to matrix material again.The photocatalyst coating on air self-purifying function fabric surface has high-hydrophilic, can form antifogging coating, simultaneously because its powerful oxidation, the oxidable pollutant that falls the surface, keep self cleaning, fabric can pass through the photocatalytic degradation toxic gas under visible light, and it is become nonpoisonous and tasteless material, can realize the purpose that efficiently purifies air rapidly.
Occasions such as the air self-purifying function fabric of this preparation can be used in the submarine, interior decoration, automotive interior trim, hospital ward have broad application prospects.
Beneficial effect
(1) air self-purifying function fabric good air purification effect of the present invention, non-secondary pollution can use for a long time;
(2) this preparation method is simple, cost is low, is convenient to making in laboratory, can be used for industrial production again.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
(1) preliminary treatment on base cloth surface:
Under 60 ℃, clean surface of cotton fabric 20min with the solution that contains 0.3g/l ethanol or 0.05g/l acetone or 0.2g/l oxalic acid or 0.3g/l chloroform with ultrasonic wave, with boiling water washing 2 times, house detergent washing 1 time, oven dry;
With volume ratio is that 7:16:10 deionized water, methyl alcohol and ether are the protectant dispersion reagent of fiber, regulate the pH value of dispersion protection system about 9.5 with ammoniacal liquor, in 20 ℃ of 15min that in ultrasonic cleaner, vibrate, make it to be uniformly dispersed, to soak in the dispersion protection system of fabric about 30 ℃ more than the 6h again, make fully absorption between the two, the fiber protective agent with mechanical deposit on the distilled water flush away fabric mutually combines fiber protective agent and fabric fibre through baking then;
With base cloth again with containing 1%～3% ethylenediamine tetra-acetic acid and 2%～6% phytic acid aqueous solution was at room temperature handled 10～15 minutes;
(2) preparation of air self-purifying function fabric:
Photochemical catalyst is added in the coating agent, directly be coated on the base cloth 6～15g/m with scraper
2, 110 ℃ of oven dry 2min obtain air self-purifying function fabric.
Wherein, the density of base cloth is 0.20g/cm
3, the line density of the fiber that base cloth is used is 1.8dtex; The particle diameter of semi-conductor nano particles is 6nm, and the aperture of porous type nano particle is 6nm; Many coating agents are made up of silicone, solvent type polyacrylate, solvent, catalyst, dispersant, and mass ratio is 4:8:10:3:2; Dispersant is the compound of poly(silicon aether) type surfactant and organosilicon-modified polyvinyl surfactant, and composite mass ratio is 1:3; Solvent is that water and ether are formed mass ratio 3:1 in the coating.
Air self-purifying function fabric and common activated carbon air purifying material that the present invention is made are respectively charged in the air purifier of same model, and under identical conditions: comprise the space, harmful gas concentration, time compare test, and its result is as follows:
Embodiment 2
A kind of preparation method of air self-purifying function fabric of photochemical catalyst coating, concrete steps are:
(1) preliminary treatment on base cloth surface:
Under 65 ℃, clean base cloth surface 30min with the solution that contains 0.4g/l ethanol or 0.1g/l acetone or 0.3g/l oxalic acid or 0.4g/l chloroform with ultrasonic wave, with boiling water washing 3 times, house detergent washing 2 times, oven dry;
With volume ratio is that 8.5:18:11 deionized water, methyl alcohol and ether are the protectant dispersion reagent of fiber, regulate the pH value of dispersion protection system about 10.5 with ammoniacal liquor, in 25 ℃ of 20min that in ultrasonic cleaner, vibrate, make it to be uniformly dispersed, to soak in the dispersion protection system of base cloth about 35 ℃ more than the 7h again, make fully absorption between the two, the fiber protective agent with mechanical deposit on the distilled water flush away fabric mutually combines fiber protective agent and fabric fibre through baking then;
With base cloth again with containing 1%～3% ethylenediamine tetra-acetic acid and 2%～6% phytic acid aqueous solution was at room temperature handled 10～15 minutes;
(2) preparation of air self-purifying function fabric:
Photochemical catalyst is added in the coating agent, directly be coated on the base cloth 6～15g/m with scraper
2, 115 ℃ of oven dry 3min obtain air self-purifying function fabric.
Wherein, base cloth is made up of non-weaving cloth, and density is 0.25g/cm
3, the line density of the fiber that base cloth is used is 2.4dtex; The particle diameter of semi-conductor nano particles is 15nm, and the aperture of porous type nano particle is 10nm; Many coating agents are made up of silicone, solvent type polyacrylate, solvent, catalyst, dispersant, and mass ratio is 5:9:13:4:3; Dispersant is the compound of poly(silicon aether) type surfactant and organosilicon-modified polyvinyl surfactant, and composite mass ratio is 1:2; Solvent is that water and ether are formed mass ratio 4:1 in the coating.
Air self-purifying function fabric and common activated carbon air purifying material that the present invention is made are respectively charged in the air purifier of same model, and under identical conditions: comprise the space, harmful gas concentration, time compare test, and its result is as follows:
Embodiment 3
(1) preliminary treatment on base cloth surface:
Under 70 ℃, clean surface of cotton fabric 40min with the solution that contains 0.5g/l ethanol or 0.15g/l acetone or 0.4g/l oxalic acid or 0.5g/l chloroform with ultrasonic wave, with boiling water washing 4 times, house detergent washing 3 times, oven dry;
With volume ratio is that 10:20:12 deionized water, methyl alcohol and ether are the protectant dispersion reagent of fiber, regulate the pH value of dispersion protection system about 11.5 with ammoniacal liquor, in 30 ℃ of 25min that in ultrasonic cleaner, vibrate, make it to be uniformly dispersed, to soak in the dispersion protection system of fabric about 40 ℃ more than the 8h again, make fully absorption between the two, the fiber protective agent with mechanical deposit on the distilled water flush away fabric mutually combines fiber protective agent and fabric fibre through baking then;
With base cloth again with containing 1%～3% ethylenediamine tetra-acetic acid and 2%～6% phytic acid aqueous solution was at room temperature handled 10～15 minutes;
(2) preparation of air self-purifying function fabric:
Photochemical catalyst is added in the coating agent, directly be coated on the base cloth 6～15g/m with scraper
2, 120 ℃ of oven dry 2min obtain air self-purifying function fabric.
Wherein, the density of base cloth is 0.30g/cm
3, the line density of the fiber that base cloth is used is 3.0dtex; The particle diameter of semi-conductor nano particles is 90nm, and the aperture of porous type nano particle is 11nm; Many coating agents are made up of silicone, solvent type polyacrylate, solvent, catalyst, dispersant, and mass ratio is 6:10:6:5:4; Dispersant is the compound of poly(silicon aether) type surfactant and organosilicon-modified polyvinyl surfactant, and composite mass ratio is 3:5; Solvent is that water and ether are formed mass ratio 5:1 in the coating.
Air self-purifying function fabric and common activated carbon air purifying material that the present invention is made are respectively charged in the air purifier of same model, and under identical conditions: comprise the space, harmful gas concentration, time compare test:
Claims (12)
1. the preparation method of an air self-purifying function fabric of photochemical catalyst coating comprises:
(1) under 60～70 ℃, clean base cloth surface 20～40min with organic solution with ultrasonic wave, with boiling water washing 2～4 times, house detergent washing 1～3 time, oven dry;
(2) with deionized water, methyl alcohol and ether be 7～10:16～20:10～12 configurations by volume, as the protectant dispersion reagent of fiber, form and disperse the protection system, regulate the pH value of dispersion protection system in 9.5～11.5 scopes with ammoniacal liquor, in 20～30 ℃ of 15～25min that in ultrasonic cleaner, vibrate, make it to be uniformly dispersed, to soak more than 6～8h in the dispersion protection system of base cloth about 30～40 ℃ again, make fully absorption between the two, with the fiber protective agent of mechanical deposit on the distilled water flush away base cloth, make through baking that fiber mutually combines on fiber protective agent and the base cloth then;
(3) at room temperature with base cloth, be that 1%～3% ethylenediamine tetra-acetic acid and mass percent concentration are 2%～6% the phytic acid aqueous solution with mass percent concentration, handled 10～15 minutes;
(4) add photochemical catalyst in coating agent, directly be coated on the base cloth with scraper, coating weight is 6～15g/m
2, 110 ℃～120 ℃ oven dry 2～4min obtain air self-purifying function fabric.
2. the preparation method of a kind of air self-purifying function fabric of photochemical catalyst coating according to claim 1, it is characterized in that: described base cloth is non-weaving cloth, woven cloth or knitted cloth, and its density is 0.20～0.30g/cm
3
3. the preparation method of a kind of air self-purifying function fabric of photochemical catalyst coating according to claim 1, it is characterized in that: the fiber of described base cloth is selected from one or both the mixture in cotton fiber, polyimide fiber, polyester fiber, polypropylene fibre, the nylon fibre, and the line density of fiber is 1.8～3.0dtex.
4. the preparation method of a kind of air self-purifying function fabric of photochemical catalyst coating according to claim 1, it is characterized in that: the organic solution in the described step (1) is 0.3～0.5g/l ethanol, 0.05～0.15g/l acetone, 0.2～0.4g/l oxalic acid or 0.3～0.5g/l chloroform.
5. the preparation method of a kind of air self-purifying function fabric of photochemical catalyst coating according to claim 1; it is characterized in that: the fiber protective agent in the described step (2) is vinyltriethoxysilane, gamma-aminopropyl-triethoxy-silane, γ glycidoxy-propyltrimethoxy silane, gamma-methyl allyl acyloxypropyl trimethoxysilane, γ-mercaptopropyl trimethoxysilane, dimethyl silicone polymer, 2,4-hexafluoroethylene methyl siloxane, polyvinylidene fluoride or hydroxy phosphorus Calx.
6. the preparation method of a kind of air self-purifying function fabric of photochemical catalyst coating according to claim 1, it is characterized in that: the photochemical catalyst of described step (4) is the porous type nano metal particles of silver and iron composite doping modification, silver and aluminium composite doping modification or lanthanum and iron composite doping modification, and its aperture is 6～16nm.
7. the preparation method of a kind of air self-purifying function fabric of photochemical catalyst coating according to claim 6, it is characterized in that: described nano metal particles is selected from TiO
2, CdS, ZnS, WO
3, SnO
2, V
2O
5, BiVO
4In one or both mixture, the particle diameter of nano metal ion is 6～90nm.
8. the preparation method of a kind of air self-purifying function fabric of photochemical catalyst coating according to claim 1, it is characterized in that: the coating agent of described step (4) is the mixture of silicone, solvent type polyacrylate, solvent, catalyst and dispersant, and its mass ratio is followed successively by 4～6:8～10:10～16:3～5:2～4.
9. the preparation method of a kind of air self-purifying function fabric of photochemical catalyst coating according to claim 8, it is characterized in that: described dispersant is the compound of poly(silicon aether) type surfactant and organosilicon-modified polyvinyl surfactant, and the mass ratio of compound is 1:3～3:5.
10. the preparation method of a kind of air self-purifying function fabric of photochemical catalyst coating according to claim 8, it is characterized in that: described catalyst is ammonium nitrate, ammonium sulfate, ammonium phosphate, ammonium carbonate, ammonium dihydrogen phosphate (ADP) or ammonium chloride.
11. the preparation method of a kind of air self-purifying function fabric of photochemical catalyst coating according to claim 8 is characterized in that: described solvent is the mixture of water and ether, and its mass ratio is 3:1～5:1.
12. the preparation method of a kind of air self-purifying function fabric of photochemical catalyst coating according to claim 1 is characterized in that: the air self-purifying function fabric of preparation is applied to submarine, hospital ward, automotive interior trim and interior decoration field.
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