CN111688400B

CN111688400B - Formaldehyde purification decorative fresco

Info

Publication number: CN111688400B
Application number: CN201910191197.4A
Authority: CN
Inventors: 刘戈; 戴九松; 郭国良; 陈猛
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-03-13
Filing date: 2019-03-13
Publication date: 2022-03-08
Anticipated expiration: 2039-03-13
Also published as: CN111688400A

Abstract

The invention discloses a formaldehyde purification decorative mural, which comprises a mural frame, wherein an outer cover, a filter material supporting body and a mural layer are sequentially sleeved in the mural frame; the filter material supporting body is internally filled with a filter material which can absorb formaldehyde and has a fluorescence effect; offer two adjacent recesses of a plurality of on one side of mural painting frame, the top of two recesses is covered jointly and is equipped with a transparent inspection window, the inspection window encloses with two recesses respectively and closes formation two independent filtration net unit, all pack in these two filtration net units has the filter material, one of them filtration net unit encloses with the both ends of inspection window and closes formation sealed structure all around, another filtration net unit is both ends open-ended structure, still be equipped with in the inspection window and link up in the inside ultraviolet fluorescent tube of these two filtration net units. The mural provided by the invention has an attractive decoration effect, has a formaldehyde purification function and can indicate when the filter material needs to be replaced.

Description

Formaldehyde purification decorative fresco

Technical Field

The invention relates to a formaldehyde purification decorative fresco.

Background

In order to deal with formaldehyde pollution in home decoration, passive formaldehyde adsorption products are produced, such as activated carbon bags, bamboo charcoal bags, diatom ooze coatings, formaldehyde removal coatings and the like. As is known well, all adsorbing materials can reach the adsorption saturation at a certain moment in the use, need change the filter screen subassembly this moment, if do not change in time, continue to use and can lead to filter screen purification function to become invalid, still can appear the condition that formaldehyde secondary released to physical adsorption class material even, increased healthy risk on the contrary. For consumers, whether the actual purification of formaldehyde has an effect or not is good, and how the loss condition of the filter screen exceeds the service life or not is difficult to visually perceive.

CN104654451A discloses an air purifier and an air purification method, and particularly discloses a material for modifying and adsorbing formaldehyde by using amine substances as active sites and application thereof in the air purifier.

CN101623582A discloses a device for indicating and removing formaldehyde, in particular to a method for indicating the using degree of a filter screen by respectively filling an activated carbon adsorption material and a formaldehyde indicator into different containers and combining the activated carbon adsorption material and the formaldehyde indicator.

There are also many reports that the color change is generated by means of an external indicator, but the consumption of the formaldehyde adsorption active group is asynchronous with the consumption of the indicator, so that the color change cannot correctly indicate the exhaustion of the adsorption material. This results in the user feeding back that the filter screen assembly has changed color just after it is purchased. How to make the adsorbing material have large formaldehyde adsorption capacity and directly, objectively and truly indicate the consumption condition of the adsorbing material through color change is a problem which is not well solved in the existing literature documents.

Disclosure of Invention

The invention aims to solve the technical problem that the exhaustion condition of an adsorbent cannot be accurately indicated by a multi-purpose filter screen and an indicator in the prior art, and provides a formaldehyde purification decorative fresco. The mural provided by the invention has an attractive decoration effect, has a formaldehyde purification function and can indicate when the filter material needs to be replaced.

The invention provides a formaldehyde purification decorative mural, which comprises a mural frame, wherein an outer cover, a filter material supporting body and a mural layer are sequentially sleeved in the mural frame; the filter material supporting body is internally filled with a filter material which can absorb formaldehyde and has a fluorescence effect;

the wall painting frame is characterized in that one side edge of the wall painting frame is provided with two adjacent grooves, a transparent inspection window is jointly covered above the two grooves, the inspection window and the two grooves are respectively enclosed to form two independent filtering grid units, the filtering grid units are filled with filtering materials, one filtering grid unit and the two ends of the inspection window are enclosed to form a structure with the periphery sealed, the other filtering grid unit is of a structure with two open ends, and ultraviolet lamp tubes penetrating through the two filtering grid units are further arranged in the inspection window.

In the present invention, preferably, a gap is left between the mural layer and the filter material support body, and the width of the gap is, for example, 3mm to 10mm, so as to facilitate air to enter. In addition, in the hanging process of the mural, the mural layer is generally arranged at the outermost side of the formaldehyde purification decorative mural.

In the invention, the wall painting frame is preferably a cuboid.

In the invention, the filter material support body is composed of a plurality of filter grid units with parallel gas channels, wherein the shape of the filter grid units can be any shape, such as hexagon, circle or square.

In the invention, the filling mode of the filter material is a conventional mode in the field, for example, the filter material is spherical, cylindrical or irregular granular after being formed, and the filter material can be arranged inside the filter grid unit in a physical filling mode or adhered to the surface of the side wall of the filter grid unit in a glue bonding mode.

In the present invention, preferably, the outer cover is a mesh cloth, and the outer cover is used for intercepting the filter material and providing a gas flow inlet and outlet consistent with the parallel gas channels. The aperture of the mesh cloth is smaller than the size of the filter material so as to ensure that the filter material cannot fall out.

In the invention, the filter material is a filter material which presents different colors or gradually-changed colors under ultraviolet light along with the continuous increase of formaldehyde adsorption amount in the field. In order to make the color development characteristic of the filter material play a role, a transparent inspection window is arranged on the side edge of the mural frame, the inspection window is made of transparent glass or acrylic, meanwhile, a filter grid unit with a sealing structure is arranged in the range of the inspection window and serves as a reference module, for example, the reference module is packaged by a transparent glass or acrylic container and is the same with the filter screen in size, and the reference module is not contacted with the outside air, so that the color comparison reference function is realized.

In the invention, the formaldehyde purification decorative fresco is preferably further provided with a power supply part matched with the ultraviolet lamp tube, and the power supply part is generally arranged outside the fresco frame. The ultraviolet lamp tube can provide any single-color or mixed-color ultraviolet light with the wavelength of the ultraviolet light source between 254nm and 400nm, is arranged near the inspection window and can irradiate the filter material of the filter screen main body and the filter material of the reference module at the same time. The power supply part comprises a switch which can control the on and off of the ultraviolet lamp tube.

In the mural painting frame, a slot hole is preferably formed at a position corresponding to an end of the ultraviolet lamp tube, and the slot hole is used for providing a space for connecting the ultraviolet lamp tube and the power supply part.

In the invention, the mural frame preferably further comprises a sealing strip, and the periphery of the mural frame is sealed by the sealing strip finally, so that the periphery of the mural frame keeps airtight, and airflow can only flow through the filter material support body from the parallel gas channel.

In the invention, preferably, the inspection window is provided with a transparent interlayer, and the ultraviolet lamp tube is arranged in the transparent interlayer and is not in direct contact with the filter material of the filter grid unit.

In the invention, preferably, the dynamic adsorption capacity of the filter material is more than or equal to 60mg/g, and the preparation method preferably comprises the following steps: uniformly mixing the porous carrier and the organic amine solution, and drying; wherein the organic amine in the organic amine solution is one or more of polyethyleneimine, polyethylene polyamine and polypropylene amine.

In the invention, the preparation method of the filter material preferably comprises the following steps:

1) uniformly mixing a solution of a noble metal soluble salt, a porous carrier and a protective agent, reducing and drying to obtain an intermediate product;

2) and (3) uniformly mixing the intermediate product with an organic amine solution, and drying.

In the preferred scheme, the fluorescent effect is amplified by utilizing the fluorescent change of polyethyleneimine molecules before and after formaldehyde adsorption and by virtue of noble metal surface plasma resonance, so that the consumption of organic amine loaded on the porous carrier can be really and directly observed.

In the present invention, the porous carrier is preferably one or more of mesoporous molecular sieve, mesoporous silica or alumina aerogel and mesoporous silica gel. Wherein, the type of the mesoporous molecular sieve is preferably SBA15 and/or MCM 41. Wherein, mesoporous has the conventional meaning in the field, and means the aperture is within 2-50 nm.

In the present invention, the organic amine solution is obtained by dissolving organic amine in methanol or ethanol or deionized water according to a conventional method in the art.

In the present invention, the molecular weight of the polyethyleneimine is preferably 600-70000g/mol, more preferably 1800-70000 g/mol.

In the invention, the dosage of the organic amine in the organic amine solution is preferably less than or equal to 0.5g/g of porous carrier.

Wherein the polyethylene polyamine is conventional in the art, such as tetraethylenepentamine and pentaethylenehexamine.

In step 1), the noble metal in the noble metal soluble salt has a meaning conventionally used in the art, and generally means 8 metal elements such as gold (Au), silver (Ag), and platinum group metals (ruthenium (Ru), rhodium (Rh), palladium (Pd), osmium (Os), iridium (Ir), platinum (Pt)), and one or more of Pt, Ag, and Au are preferable in the present invention. More preferably, the noble metal soluble salt is one or more of chloroplatinic acid, chloroauric acid and silver nitrate.

In step 1), the solution of the noble metal soluble salt is obtained by dissolving the noble metal soluble salt in deionized water according to a conventional method in the art. The molar concentration of the noble metal soluble salt in the solution of the noble metal soluble salt is preferably 0.0007 to 0.001 mol/L.

In step 1), the ratio of the mass volume of the porous support to the solution of the noble metal soluble salt is preferably 2g: 20 mL-2 g, 100mL, more preferably 2g: 50 mL.

In step 1), the protecting agent is a substance conventional in the art for protecting porous carriers, preferably polyethylene glycol. Among them, the molecular weight of the polyethylene glycol is preferably 200-. The addition volume of the protective agent is preferably less than or equal to 1mL/g of porous carrier.

In step 1), the mixing is preferably performed according to the following steps: the porous carrier is uniformly dispersed in a solution of a noble metal soluble salt, then a protective agent is added into the solution, and the mixture is uniformly stirred.

In step 1), the reduction is performed by adding a reducing agent, which is a substance that can reduce noble metals, and is conventional in the art, preferably one or more of ascorbic acid, sodium borohydride, potassium borohydride and formic acid in water, and more preferably ascorbic acid in water and/or sodium borohydride in water. In the aqueous solution of ascorbic acid, the concentration of ascorbic acid is preferably 1 mol/L. In the aqueous solution of sodium borohydride, the concentration of sodium borohydride is preferably 1 mol/L. Preferably, the addition molar weight of the reducing agent is 1-3 times of the molar weight of the noble metal soluble salt.

In step 1), before the drying, an operation of removing the solvent is preferably performed. The solvent removal can be carried out according to the procedures conventional in the art: stirring with magnetic force during heating until the solvent is completely volatilized. Wherein, the heating temperature is preferably 60 ℃, and the duration of the heating and stirring is preferably 1 h.

In the step 1), the drying is conventional oven drying. The specific conditions for drying are preferably as follows: at 105 ℃ for 1-10 h.

In the invention, the intermediate product formed in the step 1) is a nano noble metal cluster loaded in a porous carrier pore passage and coated by a protective agent.

In step 2), the mixing is preferably performed according to the following steps: uniformly dispersing the intermediate product obtained in the step 1) in an organic amine solution.

In step 2), before the drying, an operation of removing the solvent is preferably performed. The solvent removal can be carried out according to the procedures conventional in the art: stirring with magnetic force during heating until the solvent is completely volatilized. Wherein the heating temperature is preferably 50-80 ℃.

In the step 2), the drying is conventional oven drying. The specific conditions for drying are preferably as follows: 60-100 deg.C for 1-24h, such as 60-80 deg.C for 12 h.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The reagents and starting materials used in the present invention are commercially available.

The positive progress effects of the invention are as follows: the mural provided by the invention has an attractive decoration effect, has a formaldehyde purification function and can indicate when the filter material needs to be replaced.

Drawings

Fig. 1 is a schematic perspective view of a formaldehyde-purified decorative fresco of example 1 of the present application.

Fig. 2 is a schematic diagram of the exploded structure of fig. 1.

Fig. 3 is a schematic perspective view of the filter material support in example 1.

Fig. 4 is a schematic perspective view of the inspection window of embodiment 1.

Fig. 5 is a rear view of fig. 4.

Fig. 6 is a front view of the inspection window of fig. 5 further including an ultraviolet lamp tube.

Fig. 7 is a schematic perspective view of the ultraviolet lamp tube in fig. 6.

Fig. 8 is a left side view of the inspection window of fig. 2.

Fig. 9 is a schematic perspective view of the mural frame according to embodiment 1.

Fig. 10 is a front view of fig. 9.

The reference numerals are explained below:

outer cover 1

Filter material support body 2

Inspection window 3

Ultraviolet lamp tube 31

Wall painting frame 4

Slotted hole 41

Groove 42

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.

Example 1

In this embodiment, a formaldehyde-purifying decorative mural is provided, as shown in fig. 1-10, which includes a mural frame 4, and an outer cover 1, a filter material support body 2 and a mural layer (not shown) are sequentially sleeved inside the mural frame 4; the filter material support body 2 is filled with a filter material which can absorb formaldehyde and has a fluorescence effect; offer two adjacent recesses 42 on one side of mural painting frame 4, the top of two recesses 42 is covered jointly and is equipped with a transparent inspection window 3, inspection window 3 encloses with two recesses 42 respectively and closes and form two independent filtration grid units, all pack in these two filtration grid units has the filter material, one of them filters grid unit and encloses with the both ends of inspection window 3 and form sealed structure all around, another filtration grid unit is both ends open-ended structure, still be equipped with in the inspection window 3 and link up in the inside ultraviolet fluorescent tube 31 of these two filtration grid units.

In this embodiment, a gap is left between the mural layer and the filter material support body 2, so as to facilitate the air entering. In addition, in the hanging process of the mural, the mural layer is generally arranged at the outermost side of the whole formaldehyde purification decorative mural, air enters the filter screen from one side of the outer cover 1, and meanwhile air possibly enters the filter screen from the side of the mural layer.

In this embodiment, the mural frame 4 is the cuboid shape, and the filter material supporter 2 comprises a plurality of filtering grid unit that has parallel gas passage, and filtering grid unit's shape is square. The filling mode of the filter material is to arrange the filter material inside the filter grid unit in a physical filling mode.

In this example, the preparation method of the filter material is as follows:

adding a solution containing 0.012g of chloroauric acid into 50mL of deionized water, dispersing 2g of mesoporous silica gel into the solution, adding 1mL of polyethylene glycol (molecular weight is 200g/mol), and stirring and soaking for 2 hours; 0.1mL of 1M alkaline sodium borohydride solution is further added, stirred for 1h at 60 ℃, and further dried at 105 ℃ to obtain a sample (r). Dissolving 0.25mL (the density of polyethyleneimine is close to that of water and can be converted according to the density of water) of polyethyleneimine with the molecular weight of 1800g/mol in methanol, stirring by magnetic force to fully dissolve, slowly adding a sample (I), stirring at normal temperature for a period of time, heating to 70 ℃, volatilizing the solvent, and drying the obtained solid in an oven at 80 ℃ to obtain the final sample.

Through detection, the dynamic formaldehyde adsorption capacity of the filter material is 68.6 mg/g.

The dynamic formaldehyde adsorption capacity is calculated based on a dynamic adsorption breakthrough curve, namely, formaldehyde gas with certain concentration and certain flow continuously passes through an adsorbent bed, the formaldehyde concentration at the outlet of the bed is 0 at the beginning, the adsorbent is gradually consumed along with the experiment, breakthrough is realized when the formaldehyde concentration at the outlet is not 0, a breakthrough point is defined when the outlet concentration reaches 10% of the inlet concentration, the outlet concentration and the time are respectively plotted as horizontal and vertical coordinates to obtain a breakthrough curve, and the adsorption capacity calculated according to the breakthrough curve is the dynamic adsorption capacity.

The data shown in this example are based on dynamic penetration curve experiments, formaldehyde is generated by a volatile gas distribution bottle, polyformaldehyde solid is filled in the gas distribution bottle, formaldehyde is taken out by carrier gas flow through the gas distribution bottle and is mixed with diluent gas, and the concentration of formaldehyde is controlled by controlling the flow of the carrier gas and the diluent gas. The gas preparation bottle is placed in a refrigerator for keeping constant temperature so as to obtain stable formaldehyde concentration. The experimental parameters were:

the formaldehyde flow is 50sccm, and the total air flow is 500 sccm;

the temperature of a refrigerator is 12 ℃, and 1g of paraformaldehyde in the bottle is volatilized;

the common humidity is about 50%, and the environment is kept at the constant temperature of 26 ℃;

0.2g of adsorbent, grinding and sieving to 40-60 meshes, corresponding to a mass space velocity of about 150000h-¹。

In this embodiment, the filtering mesh unit with the sealing structure is installed in the inspection window 3 as a reference module, the reference module is made of transparent glass or an acrylic container, and the filter material with the same thickness as the filter screen is packaged in the reference module, so that the reference module is not in contact with the outside air, and the color comparison reference function is achieved.

In this embodiment, the mural is further provided with a power supply portion matched with the ultraviolet lamp tube 31, and the power supply portion is generally arranged outside the mural frame 4. The ultraviolet lamp tube 31 can provide any single-color or mixed-color ultraviolet light with the wavelength of the ultraviolet light source between 254nm and 400nm, and the ultraviolet lamp tube 31 is arranged on the inspection window and can irradiate the filter material of the filter screen main body and the filter material of the reference module at the same time. The power supply part comprises a switch which can control the on and off of the ultraviolet lamp tube 31.

The wall painting frame 4 is further provided with a slot 41 corresponding to the end position of the ultraviolet lamp 31, and the slot 41 is used for providing a space for connecting the ultraviolet lamp 31 with the power supply part. The inspection window 3 is provided with a transparent interlayer, and the ultraviolet lamp tube 31 is fixed in the transparent interlayer and is not in direct contact with the filter material filled in the filter grid unit.

The outer cover 1 is mesh cloth, and the aperture of the mesh cloth is smaller than the size of the filter material so as to ensure that the filter material cannot fall out.

In this embodiment, the frame further comprises a sealing strip, and the periphery of the frame 4 is finally sealed by the sealing strip, so that the periphery of the filter screen is kept airtight, and the airflow can only flow through the filter screen from the parallel air channels.

In this embodiment, the mural frame 4 is filled with a novel formaldehyde adsorbing material, and after the material adsorbs formaldehyde, the fluorescence characteristics change, and under the irradiation of ultraviolet light, the material presents an obvious color change, and further can be compared with an ultraviolet light source assembly and a reference module on the mural frame 4; from this it is possible to accurately determine whether a material is effective and when it fails.

The mechanism of this example is: when the ultraviolet lamp tube 31 is closed, the color difference between the filter material and the reference module cannot be observed; when the filter material just does not work, the light of the ultraviolet lamp tube 31 can only excite the fluorescence of the amine-based voltage fluorophore and is enhanced by the surface resonance of the noble metal plasma, and at the moment, the filter materials in the reference module and the filter material support body 2 both display blue fluorescence; when the filter material adsorbs formaldehyde, the consumed part generates yellow green light under the excitation of ultraviolet light, and the reference module still generates blue fluorescence at the moment; along with the adsorption continues, the part that discolours is more and begin to demonstrate the gradual change of colour, and the user can direct observation filter material in filter material supporter 2's the condition of exhausting through transparent inspection window 3. The self-color development phenomenon is generated after the material is reacted by macromolecular amine and formaldehyde, and no additional color developing agent is added, so that the color change can most objectively indicate the consumption degree of the material. The user can objectively and directly know the filter material exhaustion condition in the filter material support body 2, and an accurate indication function is provided for whether the filter material is in effect and when the filter material needs to be replaced.

Claims

1. A formaldehyde purification decorative mural is characterized by comprising a mural frame, wherein an outer cover, a filter material supporting body and a mural layer are sequentially sleeved in the mural frame; the filter material supporting body is internally filled with a filter material which can absorb formaldehyde and has a fluorescence effect;

the preparation method of the filter material comprises the following steps: uniformly mixing the porous carrier and the organic amine solution, and drying; wherein the organic amine in the organic amine solution is one or more of polyethyleneimine, polyethylene polyamine and polypropylene amine;

2. The formaldehyde-purifying decorative fresco of claim 1, wherein a gap is left between the mural layer and the filter material support body, and the width of the gap is 3mm-10 mm.

3. The formaldehyde-purifying decorative fresco of claim 1, wherein the fresco frame is a rectangular parallelepiped;

the filter material support body is composed of a plurality of filter grid units with parallel gas channels, and the filter grid units are hexagonal, circular or square.

4. The formaldehyde-purifying decorative fresco of claim 3, wherein the filter material is filled in the filter mesh units by physical filling, or adhered to the side wall surfaces of the filter mesh units by glue.

5. The formaldehyde-purifying decorative fresco of claim 4, wherein the inspection window is made of transparent glass or acrylic, and the size of the filter material filled in the filter grid units with the periphery sealed corresponding to the inspection window is the same as the size of the filter material filled in the rest filter grid units.

6. The formaldehyde-purifying decorative fresco of claim 1, wherein the formaldehyde-purifying decorative fresco further comprises a power supply portion cooperating with the ultraviolet lamp, the power supply portion is disposed outside the fresco frame, and the power supply portion comprises a switch for controlling the ultraviolet lamp to be turned on and off.

7. The formaldehyde-purifying decorative fresco of claim 6, wherein a slot is further formed in the mural frame at a position corresponding to an end of the ultraviolet lamp tube, the slot being used to provide a space for connecting the ultraviolet lamp tube and the power supply portion.

8. The formaldehyde-purifying decorative fresco of claim 1, wherein the outer cover is a mesh cloth, and the pore size of the mesh cloth is smaller than the size of the filter material.

9. The formaldehyde purifying decorative fresco of claim 1, further comprising a sealing strip for sealing the periphery of the fresco frame.

10. The formaldehyde-purifying decorative fresco of claim 1, wherein the inspection window has a transparent interlayer, and the ultraviolet lamp is disposed in the transparent interlayer without directly contacting with the filter material of the filter grid unit.