Non-woven fabric with formaldehyde removal function

Abstract

The invention discloses a non-woven fabric with a formaldehyde removal function. The non-woven fabric with the formaldehyde removal function comprises a base fabric layer, a fabric layer and a fabric layer, the amino acid layer is positioned on one side of the base cloth layer; the photocatalyst layer is positioned on one side, far away from the base cloth layer, of the amino acid layer. Therefore, the amino acid layer is loaded on the base cloth layer, then the photocatalyst layer is loaded on the amino acid layer, and formaldehyde can be continuously and rapidly degraded through the synergistic effect of the amino acid layer and the photocatalyst layer, so that indoor air can be effectively purified.

Description

Technical Field

[0001] The invention relates to the field of air purification, and in particular to a non-woven fabric with formaldehyde removal function. Background Art

[0002] As people's living standards continue to improve, the problem of air pollution in the home environment has attracted more and more attention. Formaldehyde is one of the main chemicals that cause home environment pollution, which can cause damage to the human nervous system, respiratory system, etc.

[0003] At present, the commonly used methods for removing formaldehyde from home environments mainly include physical methods and chemical methods. The physical method refers to the use of porous materials such as diatomaceous earth and activated carbon to adsorb formaldehyde. This method will produce a good formaldehyde removal effect in a short period of time, but there is a problem of secondary release of harmful substances after adsorption saturation; the chemical method refers to the use of formaldehyde removal agents to treat indoor formaldehyde by spraying, but this method requires the use of professional equipment, and the use process is cumbersome. In addition, there are some wet wipes products on the market that have the function of removing formaldehyde. It is time-consuming and labor-intensive to wipe the surface of the object (including the outer surface and the inner surface) to remove harmful substances such as aldehydes. Summary of the invention

[0004] The present invention aims to alleviate or solve at least one of the above-mentioned problems to at least some extent.

[0005] In one aspect of the present invention, the present invention proposes a non-woven fabric with a formaldehyde removal function. According to some embodiments of the present invention, the non-woven fabric with a formaldehyde removal function includes: a base fabric layer; an amino acid layer, the amino acid layer is located on one side of the base fabric layer; and a photocatalyst layer, the photocatalyst layer is located on the side of the amino acid layer away from the base fabric layer. Thus, the amino acid layer is loaded on the base fabric layer, and then the photocatalyst layer is loaded on the amino acid layer. Through the synergistic effect of the amino acid layer and the photocatalyst layer, the continuous and rapid degradation of formaldehyde can be achieved, thereby effectively purifying the indoor air.

[0006] According to some embodiments of the present invention, the base fabric layer is a spunlace nonwoven fabric, a meltblown nonwoven fabric or a spunbond nonwoven fabric. Therefore, the base fabric layer has a certain strength and can provide a certain support effect for the amino acid layer and the photocatalyst layer thereon.

[0007] According to some embodiments of the present invention, the amino acid layer includes an amino acid extract, so that the amino acid layer can play a certain role in removing formaldehyde, thereby purifying indoor air.

[0008] According to some embodiments of the present invention, the amino acid layer includes at least one of glutamic acid, glycine, proline, alanine, lysine, arginine, methionine and histidine. Thus, the amino acid layer can combine with formaldehyde through a chemical reaction to achieve capture and decomposition of formaldehyde.

[0009] According to some embodiments of the present invention, the thickness of the amino acid layer is 0.01 mm-0.1 mm. When the thickness of the amino acid layer is within the above range, more formaldehyde can be removed.

[0010] According to some embodiments of the present invention, the photocatalyst layer includes TiO 2. Thus, under light conditions, the photocatalyst layer can generate electron-hole pairs, thereby catalytically degrading organic pollutants such as formaldehyde.

[0011] According to some embodiments of the present invention, the thickness of the photocatalyst layer is 0.01 mm-0.1 mm, which is helpful to further improve the formaldehyde removal effect of the product.

[0012] According to some embodiments of the present invention, the nonwoven fabric with formaldehyde removal function further comprises: a first adhesive layer, the first adhesive layer is located between the base fabric layer and the amino acid layer; and a second adhesive layer, the second adhesive layer is located between the amino acid layer and the photocatalyst layer. Thus, the adjacent layers are bonded together by the adhesive layer, which is beneficial to improving the overall stability of the product, thereby helping to extend the service life of the product.

[0013] According to some embodiments of the present invention, the first adhesive layer and the second adhesive layer independently include at least one of polyvinyl alcohol, polyvinyl pyrrolidone, and polyethylene oxide. The above materials have good adhesion and can significantly improve the bonding force between adjacent layers.

[0014] According to some embodiments of the present invention, the shape of the non-woven fabric with the formaldehyde removal function is rectangular, circular, oval, pentagonal or hexagonal. Therefore, the product has a wider adaptability and can better meet the needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 A schematic diagram showing the structure of a non-woven fabric having a formaldehyde removal function in one embodiment of the present invention is shown;

[0017] Figure 2 A schematic structural diagram of a non-woven fabric having a formaldehyde removal function according to another embodiment of the present invention is shown;

[0018] Figure 3 The 24-hour formaldehyde removal performance test results of the non-woven fabric with formaldehyde removal function in various embodiments of the present invention are shown;

[0019] Figure 4The test results of the cyclic formaldehyde removal performance of the nonwoven fabric with formaldehyde removal function in Example 4 of the present invention are shown;

[0020] Figure 5 The VOC removal performance test results of the non-woven fabric with formaldehyde removal function in Example 4 of the present invention are shown.

[0021] Description of reference numerals:

[0022] 1: base fabric layer; 2: amino acid layer; 3: photocatalyst layer; 4: first adhesive layer; 5: second adhesive layer. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] In one aspect of the present invention, the present invention provides a nonwoven fabric with formaldehyde removal function.

[0025] According to some embodiments of the present invention, reference Figure 1 The non-woven fabric with formaldehyde removal function may include a base fabric layer 1, an amino acid layer 2 and a photocatalyst layer 3, wherein the amino acid layer 2 is located on one side of the base fabric layer 1, and the photocatalyst layer 3 is located on the side of the amino acid layer 2 away from the base fabric layer 1. The amino acid layer is loaded on the base fabric layer, and then the photocatalyst layer is loaded on the amino acid layer. The non-woven fabric can achieve continuous and rapid degradation of formaldehyde through the synergistic effect of the amino acid layer and the photocatalyst layer, thereby effectively purifying indoor air. In addition, the non-woven fabric product has a simple structure and is easy to use. When in use, the non-woven fabric product can be directly placed in the indoor space.

[0026] According to some embodiments of the present invention, the base fabric layer 1 can be a spunlace nonwoven fabric, a meltblown nonwoven fabric or a spunbond nonwoven fabric. The above nonwoven fabrics all have a certain mechanical strength and can provide good support for the amino acid layer and the photocatalyst layer formed subsequently; and the base fabric layer can be made into various shapes and sizes as needed, thereby improving the applicability of the product.

[0027] According to some embodiments of the present invention, the amino acid layer 2 may include an amino acid extract, which may be combined with formaldehyde through a chemical reaction to achieve capture and decomposition of formaldehyde.

[0028] According to some embodiments of the present invention, the amino acid layer 2 may include at least one of glutamic acid, glycine, proline, alanine, lysine, arginine, methionine and histidine. The above amino acids can capture and decompose formaldehyde through chemical reactions, thereby achieving the purpose of removing indoor formaldehyde and purifying indoor air.

[0029] According to some embodiments of the present invention, the amino acid layer 2 may be composed of glutamic acid, glycine, proline, alanine, lysine, arginine, methionine or histidine. According to other embodiments of the present invention, the amino acid layer 2 may be composed of two or more of glutamic acid, glycine, proline, alanine, lysine, arginine, methionine and histidine. The addition ratio of various amino acids is not particularly limited in the present invention, and those skilled in the art may set and adjust according to actual needs.

[0030] According to some embodiments of the present invention, the thickness of the amino acid layer 2 may be 0.01 mm-0.1 mm, for example, the thickness of the amino acid layer 2 may be 0.01 mm, 0.03 mm, 0.06 mm, 0.09 mm, 0.1 mm, etc. When the thickness of the amino acid layer 2 is within the above range, more formaldehyde can be captured and decomposed, which is beneficial to improving the effect of the non-woven fabric product in purifying indoor air, and is beneficial to extending the service life of the non-woven fabric product.

[0031] According to some embodiments of the present invention, the amino acid extract can be dissolved in a suitable solvent (such as water, alcohol or other organic solvents) to form a uniform solution, and the solution containing the amino acid extract can be coated on one side of the base fabric layer by dipping, spraying, spin coating, brushing, etc., and the amino acid layer can be obtained after drying.

[0032] In some embodiments of the present invention, one or more of glutamic acid, glycine, proline, alanine, lysine, arginine, methionine and histidine can be dissolved in a suitable solvent (such as water, alcohol or other organic solvents) to form a solution, and then the solution containing the amino acid extract is coated on one side of the base fabric layer by dipping, spraying, spin coating, brushing, etc., and the amino acid layer is obtained after drying.

[0033] According to some embodiments of the present invention, the photocatalyst layer 3 may include TiO2. According to some specific embodiments of the present invention, the photocatalyst layer may be TiO2. Under ultraviolet or visible light irradiation, TiO2 can generate highly reactive electron-hole pairs, which can catalyze the degradation of organic pollutants; the generated electrons and holes can react with oxygen and water molecules to generate hydroxyl radicals and superoxide anions with strong oxidizing ability, which can decompose harmful aldehyde substances such as formaldehyde into harmless substances, such as water and carbon dioxide; TiO2 also has a certain self-cleaning effect, which can make the surface of the material less likely to be contaminated with dirt, so that the non-woven fabric product remains clean.

[0034] According to some embodiments of the present invention, the thickness of the photocatalyst layer 3 may be 0.01 mm-0.1 mm, for example, the thickness of the photocatalyst layer 3 may be 0.01 mm, 0.03 mm, 0.05 mm, 0.07 mm, 0.09 mm, 0.1 mm, etc. The thickness of the photocatalyst layer within the above range is conducive to further improving the effect of the non-woven fabric product in purifying indoor air, and is conducive to extending the service life of the non-woven fabric product.

[0035] According to some embodiments of the present invention, TiO2 powder can be mixed with a solvent (such as water or an organic solvent) to form a dispersion, and then the dispersion is coated on the side of the amino acid layer away from the base fabric layer by dipping, spraying, brushing, spin coating, etc., and the photocatalyst layer is obtained after drying.

[0036] According to some embodiments of the present invention, reference Figure 2 The non-woven fabric with formaldehyde removal function may further include a first adhesive layer 4 and a second adhesive layer 5, wherein the first adhesive layer 4 is located between the base fabric layer 1 and the amino acid layer 2, and the second adhesive layer 5 is located between the amino acid layer 2 and the photocatalyst layer 3. Thus, the layers are bonded by the adhesive layer, which is beneficial to improving the bonding strength between any two adjacent layers, thereby improving the overall stability of the non-woven fabric product and extending the service life of the non-woven fabric product.

[0037] According to some embodiments of the present invention, the first adhesive layer 4 and the second adhesive layer 5 may each independently include at least one of polyvinyl alcohol, polyvinyl pyrrolidone, and polyethylene oxide. The above materials all have good adhesion and can generate strong bonding force between any two adjacent layers, thereby helping to improve the overall stability of the product.

[0038] According to some specific embodiments of the present invention, the first adhesive layer 4 and the second adhesive layer 5 can each independently be polyvinyl alcohol, polyvinyl pyrrolidone or polyethylene oxide.

[0039] According to other specific embodiments of the present invention, the first adhesive layer 4 and the second adhesive layer 5 can be independently composed of two or three of polyvinyl alcohol, polyvinyl pyrrolidone and polyethylene oxide. When the first adhesive layer or the second adhesive layer is composed of two or three of the above materials, the present invention does not specifically limit the specific proportion of each component, and those skilled in the art can select and adjust according to actual conditions.

[0040] According to some embodiments of the present invention, at least one of polyvinyl alcohol, polyvinyl pyrrolidone and polyethylene oxide can be dissolved in a solvent (water or an organic solvent), stirred evenly to form a glue solution, and then the glue solution is coated on the non-woven base fabric layer. After drying and curing, the first adhesive layer or the second adhesive layer can be obtained.

[0041] According to some embodiments of the present invention, the shape of the non-woven fabric with the formaldehyde removal function can be rectangular, circular, oval, pentagonal or hexagonal. Therefore, the non-woven fabric has good applicability, and users can choose products of different shapes according to their needs.

[0042] In the present invention, the non-woven fabric with formaldehyde removal function can be made into different sizes and shapes according to actual needs, so as to better meet the use requirements of users.

[0043] In the present invention, the non-woven fabric with formaldehyde removal function can be directly placed indoors, for example, can be directly covered on the surface of furniture, or can be directly placed on the wall as a decorative fabric.

[0044] The present invention will be described below by specific examples, and it will be appreciated by those skilled in the art that the following specific examples are only for illustrative purposes, and do not limit the scope of the present invention in any way. In addition, in the following examples, unless otherwise specified, the materials and equipment used are all commercially available. If in the following examples, specific processing conditions and processing methods are not clearly described, then conditions and methods known in the art can be used to process.

[0045] Example 1

[0046] The nonwoven fabric with formaldehyde removal function in Example 1 includes a base fabric layer 1, an amino acid layer 2, and a photocatalyst layer 3 arranged from bottom to top. A first adhesive layer 4 is arranged between the base fabric layer 1 and the amino acid layer 2, and the amino acid layer 2 is fixed by the first adhesive layer 4. The amino acid layer 2 and the photocatalyst layer 3 are connected by a second adhesive layer 5. Figure 2 shown.

[0047] In Example 1, the base fabric layer 1 is a spunlace nonwoven fabric; the first adhesive layer 4 is polyvinyl pyrrolidone; the amino acid layer 2 is an amino acid extract (lysine) with a thickness of 0.01 mm; the second adhesive layer 5 is polyvinyl alcohol; and the photocatalyst layer 3 is TiO2 with a thickness of 0.01 mm.

[0048] Example 2

[0049] The nonwoven fabric with formaldehyde removal function in Example 2 includes a base fabric layer 1, an amino acid layer 2, and a photocatalyst layer 3 arranged from bottom to top. A first adhesive layer 4 is arranged between the base fabric layer 1 and the amino acid layer 2, and the amino acid layer 2 is fixed by the first adhesive layer 4. The amino acid layer 2 and the photocatalyst layer 3 are connected by a second adhesive layer 5. Figure 2 shown.

[0050] In Example 2, the base fabric layer 1 is a meltblown nonwoven fabric; the first adhesive layer 4 is polyethylene oxide; the amino acid layer 2 is an amino acid extract (lysine) with a thickness of 0.05 mm; the second adhesive layer is polyvinyl pyrrolidone; and the photocatalyst layer 3 is TiO2 with a thickness of 0.01 mm.

[0051] Example 3

[0052] The nonwoven fabric with formaldehyde removal function in Example 3 includes a base fabric layer 1, an amino acid layer 2, and a photocatalyst layer 3 arranged from bottom to top. A first adhesive layer 4 is arranged between the base fabric layer 1 and the amino acid layer 2, and the amino acid layer 2 is fixed by the first adhesive layer 4. The amino acid layer 2 and the photocatalyst layer 3 are connected by a second adhesive layer 5. Figure 2 shown.

[0053] In Example 3, the base fabric layer 1 is a meltblown nonwoven fabric; the first adhesive layer 4 is polyvinyl alcohol; the amino acid layer 2 is an amino acid extract (the specific components are the same as those in Example 1) with a thickness of 0.01 mm; the second adhesive layer 5 is polyethylene oxide; and the photocatalyst layer 3 is TiO2 with a thickness of 0.02 mm.

[0054] Example 4

[0055] The nonwoven fabric with formaldehyde removal function in Example 4 includes a base fabric layer 1, an amino acid layer 2, and a photocatalyst layer 3 arranged from bottom to top. A first adhesive layer 4 is arranged between the base fabric layer 1 and the amino acid layer 2, and the amino acid layer 2 is fixed by the first adhesive layer 4. The amino acid layer 2 and the photocatalyst layer 3 are connected by a second adhesive layer 5. Figure 2 shown.

[0056] In Example 4, the base fabric layer 1 is a spunlace nonwoven fabric; the first adhesive layer 4 is polyvinyl pyrrolidone; the amino acid layer 2 is an amino acid extract (lysine) with a thickness of 0.02 mm; the second adhesive layer is polyvinyl alcohol; and the photocatalyst layer 3 is TiO2 with a thickness of 0.02 mm.

[0057] The non-woven fabric products with formaldehyde removal function in Examples 1-4 were tested for their 24h formaldehyde removal performance, cyclic formaldehyde removal performance, and VOC removal performance. The specific test method is as follows: 80L sealed box test, use a pipette to absorb the contaminated liquid in advance, after complete evaporation, stir with a fan for 30 minutes, test the initial concentration, then open the non-woven fabric, and test the formaldehyde concentration or VOC concentration in the box at different times.

[0058] The 24h formaldehyde removal performance test results of the samples of Examples 1-4 are as follows: Figure 3 As shown, Figure 3 The horizontal axis in represents the sample number, 1, 2, 3, 4 correspond to the samples of Example 1, Example 2, Example 3 and Example 4 respectively. Figure 3 It can be seen that the formaldehyde removal rates of all embodiments are above 80%, among which the sample of Embodiment 4 has the highest formaldehyde removal efficiency, with a formaldehyde removal rate of 93.9%.

[0059] Figure 4 The results of the 10-cycle formaldehyde removal performance test (single 2h) of the sample of Example 4, the abscissa is the number of cycle tests, Figure 4 It can be seen that the 2h formaldehyde removal rate of Example 4 reaches 90.7%, and the formaldehyde removal rate in the 10th cycle reaches 82.1%. The sample decays within 10% after 10 cycles, indicating that the sample has good formaldehyde removal efficiency and formaldehyde removal stability.

[0060] Figure 5 The VOC removal performance test results of the samples of Example 4 (the photocatalyst layer can remove VOCs) are shown in Table 1. Figure 5 It can be seen that the efficiency of VOC removal of this product reaches 87.0% in 3 hours.

[0061] In general, the non-woven fabric with formaldehyde removal function proposed in the present invention has good formaldehyde removal effect and good VOC removal effect, and can be used to purify indoor air; the non-woven fabric product has a simple structure, is easy to operate, and can be directly placed indoors.

[0062] In the description of the present invention, the orientation or position relationship indicated by the terms "upper" and "lower" etc. is based on the orientation or position relationship shown in the drawings and is only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "another embodiment", "some embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory. In addition, it should be noted that in this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0064] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A non-woven fabric with formaldehyde removal function, It is characterized in that include: Base fabric layer; an amino acid layer, the amino acid layer being located on one side of the base fabric layer; A photocatalyst layer is located on a side of the amino acid layer away from the base fabric layer.

2. The nonwoven fabric with formaldehyde removal function according to claim 1, It is characterized in that The base fabric layer is spunlace nonwoven fabric, meltblown nonwoven fabric or spunbond nonwoven fabric.

3. The nonwoven fabric with formaldehyde removal function according to claim 1, It is characterized in that The amino acid layer includes amino acid extract.

4. The nonwoven fabric with formaldehyde removal function according to claim 1, It is characterized in that The amino acid layer includes at least one of glutamic acid, glycine, proline, alanine, lysine, arginine, methionine and histidine.

5. The nonwoven fabric with formaldehyde removal function according to claim 1, It is characterized in that The thickness of the amino acid layer is 0.01 mm-0.1 mm.

6. The nonwoven fabric with formaldehyde removal function according to claim 1, It is characterized in that The photocatalyst layer includes TiO 2 .

7. The nonwoven fabric with formaldehyde removal function according to claim 1, It is characterized in that The thickness of the photocatalyst layer is 0.01 mm-0.1 mm.

8. The nonwoven fabric with formaldehyde removal function according to claim 1, It is characterized in that Also includes: a first adhesive layer, wherein the first adhesive layer is located between the base fabric layer and the amino acid layer; A second adhesive layer is located between the amino acid layer and the photocatalyst layer.

9. The nonwoven fabric with formaldehyde removal function according to claim 8, It is characterized in that The first adhesive layer and the second adhesive layer each independently include at least one of polyvinyl alcohol, polyvinyl pyrrolidone, and polyethylene oxide.

10. The nonwoven fabric with formaldehyde removal function according to any one of claims 1 to 9, It is characterized in that The non-woven fabric with formaldehyde removal function is in the shape of rectangle, circle, oval, pentagon or hexagon.

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