A new type of VOC adsorption material for color-coated plates and its preparation method

Abstract

The invention discloses a novel VOC adsorption material for color-coated plates and a preparation method thereof. The raw materials used in the adsorption material are as follows: 30-50 parts of activated carbon fiber, 10-20 parts of nano titanium dioxide, 10-20 parts of zeolite molecular sieve, 10-20 parts of palygorskite, 8-15 parts of silicate cement and 5-10 parts of a binder according to weight components. The preparation method of the novel VOC adsorption material for color-coated plates comprises the following steps: respectively crushing the activated carbon fiber, nano titanium dioxide, zeolite molecular sieve and palygorskite to 100-300 meshes, and uniformly mixing the crushed raw materials with silicate cement in proportion; adding a binder to the mixed raw materials, stirring evenly to form a paste material; extruding the paste material to obtain an adsorption material blank; drying the adsorption material blank at 80-120°C for 2-4 hours, and then maintaining it at 300-500°C for activation for 2-4 hours to obtain the VOC adsorption material for color-coated plates; cutting and packaging the adsorption material obtained after activation to obtain a finished product.

Description

Technical Field

[0001] The present invention relates to the technical field related to environmentally friendly materials, and in particular to a novel VOC adsorption material for color-coated plates and a preparation method thereof. Background Art

[0002] With the rapid development of industrial economy, color-coated steel sheets have been widely used as an important material in the fields of construction and home appliances. Color-coated steel sheets are a product obtained by applying organic coatings on the surface of steel sheets. They have many advantages such as bright colors, strong corrosion resistance, and convenient processing and molding. However, color-coated steel sheets have serious pollution problems during production and use, that is, they release volatile organic compounds, hereinafter referred to as VOCs.

[0003] VOC is an organic compound that is easily volatile at room temperature. The gases formed after volatilization mainly include benzene, toluene, xylene, ethylbenzene, formaldehyde, acetaldehyde, etc. These compounds not only have irritating odors, but also have great harm to human health and the environment. Long-term exposure to VOCs can cause symptoms such as headaches, dizziness, fatigue, nausea, vomiting, and severe cases can even lead to diseases such as cancer and leukemia. In addition, VOCs will also participate in atmospheric photochemical reactions to form secondary pollutants such as ozone and fine particulate matter, which will have a serious impact on the quality of the atmospheric environment.

[0004] At present, the main methods for treating VOC released by color-coated sheets include adsorption, catalytic combustion, biodegradation, etc. Among them, the adsorption method has become a commonly used VOC treatment method due to its advantages of easy operation, low cost, less impact on the surrounding environment, and wide application range. The principle of the adsorption method is to use the porous structure and surface activity of the adsorption material to adsorb VOC molecules on its surface or inside, thereby achieving the purpose of removing VOC.

[0005] There are many deficiencies in existing adsorption materials, which are difficult to meet the needs of practical applications. First, the adsorption capacity of existing adsorption materials is generally low. Adsorption capacity refers to the mass of VOC that can be adsorbed by a unit mass of adsorption material. Low adsorption capacity means that a large amount of adsorption material is needed to achieve a better adsorption effect, which not only increases the cost, but also takes up more space; secondly, the existing adsorption materials have poor selectivity. Selectivity refers to the difference in the adsorption capacity of adsorption materials for different VOC molecules. Poor selectivity means that the adsorption material will not only adsorb the target VOC molecules, but also other irrelevant substances, thereby reducing the adsorption efficiency and service life of the adsorption material; finally, the existing adsorption materials need to be regenerated or replaced after adsorption saturation, which not only increases the complexity of operation, but also causes secondary pollution.

[0006] In order to solve the above problems, it is of great practical significance to develop a new type of VOC adsorption material and preparation method for color-coated plates. This new adsorption material should have the advantages of high adsorption capacity, high selectivity, renewability, etc., and can effectively remove VOCs released by color-coated plates, thereby reducing the adverse effects of color-coated plates on the environment and humans during production and use. Summary of the invention

[0007] In order to comprehensively solve the VOC pollution problem generated during the production and use of color-coated plates, the present invention provides a new VOC adsorption material for color-coated plates and a preparation method for solving the above problems.

[0008] To achieve the above purpose, the present invention adopts the following technical means:

[0009] A novel VOC adsorption material for color-coated plates. The raw materials used in the adsorption material are as follows: 30-50 parts of activated carbon fiber, 10-20 parts of nano titanium dioxide, 10-20 parts of zeolite molecular sieve, 10-20 parts of palygorskite, 8-15 parts of silicate cement and 5-10 parts of a binder in terms of weight components.

[0010] The principles and functions of the above ingredients are as follows:

[0011] Activated carbon fiber: has a high specific surface area and rich microporous structure, which can effectively adsorb VOCs;

[0012] Nano-titanium dioxide: It has photocatalytic effect, can decompose adsorbed VOCs and increase the service life of adsorption materials;

[0013] Zeolite molecular sieve: has a regular pore structure and can selectively adsorb VOCs of a specific molecular size;

[0014] Palyolanite: Palyolanite uses its nano-scale pore channels and huge specific surface area to effectively adsorb organic matter such as VOCs and their volatile decomposition products in the air through physical adsorption and chemical adsorption.

[0015] Portland cement: It has a good adsorption effect on nitrogen oxides (NOx) and formaldehyde and other gases generated during the production, use and decomposition of color-coated boards; it can also adsorb heavy metal ions under certain conditions;

[0016] Binder: As a binder, it binds the raw materials together to form a stable adsorption material.

[0017] Preferably, the activated carbon fiber has a specific surface area of ​​1500-2000 m2 / g and a micropore volume of 0.5-1.0 cm3 / g.

[0018] Preferably, the particle size of the nano titanium dioxide is 20-50 nm.

[0019] Preferably, the zeolite molecular sieve is one or both of ZSM-5 molecular sieve and Y-type molecular sieve.

[0020] Preferably, the specific surface area of ​​the palygorskite is 100-200 m2 / g.

[0021] Preferably, the binder is one or both of sodium carboxymethyl cellulose and polyvinyl alcohol.

[0022] A method for preparing a novel VOC adsorption material for color-coated plates comprises the following steps:

[0023] Step A, crushing activated carbon fiber, nano titanium dioxide, zeolite molecular sieve, and palygorskite to 100-300 meshes respectively, and uniformly mixing the crushed raw materials with silicate cement according to proportion;

[0024] Step B, adding a binder to the mixed raw materials, stirring evenly to form a paste-like material;

[0025] Step C, extruding the paste material to obtain an adsorption material blank;

[0026] Step D, drying the adsorption material blank at 80-120° C. for 2-4 hours, and then activating it at 300-500° C. for 2-4 hours to obtain a color-coated plate VOC adsorption material;

[0027] Step E: cutting and packaging the activated adsorption material to obtain a finished product.

[0028] Preferably, the amount of the binder added is 5-10% of the total weight of the mixed raw materials.

[0029] Preferably, the extrusion molding pressure is 10-20 MPa.

[0030] The stable support device for coal mine drilling of the present invention has the following beneficial effects:

[0031] 1. High adsorption capacity: The composite and coordinated use of multiple adsorption materials such as activated carbon fiber, nano-titanium dioxide, zeolite molecular sieve, palygorskite and silicate cement improves the adsorption capacity of the adsorption materials and the types and capabilities of adsorbing toxic and harmful substances.

[0032] 2. Good selectivity: Zeolite molecular sieve has selective adsorption properties and can preferentially adsorb specific VOC molecules, thus improving the selectivity of the adsorption material.

[0033] 3. Photocatalytic decomposition: Nano-titanium dioxide has photocatalytic activity and can decompose adsorbed VOCs into harmless substances under light conditions, achieving self-cleaning of the adsorption material.

[0034] 4. Simple preparation method: The preparation method of the present invention is simple, easy to operate, and has relatively low production cost and use cost, and is more suitable for large-scale production and transportation and storage. DETAILED DESCRIPTION

[0035] The following will be combined with a clear and complete description of the technical solution of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Embodiment 1:

[0039] A new type of VOC adsorption material for color-coated plates and a preparation method thereof, the material components and the preparation method thereof are as follows:

[0040] Step A, weighing 40 parts of activated carbon fiber, 15 parts of nano titanium dioxide, 15 parts of zeolite molecular sieve, 15 parts of palygorskite, and 5 parts of sodium carboxymethyl cellulose; wherein the activated carbon fiber, nano titanium dioxide, zeolite molecular sieve, and palygorskite are crushed to 200 mesh respectively, and the crushed raw materials are added with 8 parts of silicate cement in proportion and mixed evenly;

[0041] Step B: add sodium carboxymethyl cellulose to the mixed raw materials, stir evenly to form a paste material.

[0042] Step C: Extruding the paste material under a pressure of 15 MPa to obtain an adsorption material blank.

[0043] Step D: Dry the adsorption material blank at 100° C. for 3 hours, and then activate it at 400° C. for 3 hours to obtain a color-coated plate VOC adsorption material.

[0044] Embodiment 2:

[0045] A new type of VOC adsorption material for color-coated plates and a preparation method thereof, the material components and the preparation method thereof are as follows:

[0046] Step A, weighing 30 parts of activated carbon fiber, 20 parts of nano titanium dioxide, 10 parts of zeolite molecular sieve, 20 parts of palygorskite, and 10 parts of polyvinyl alcohol; crushing the activated carbon fiber, nano titanium dioxide, zeolite molecular sieve, and palygorskite to 100 mesh respectively, adding 15 parts of silicate cement to the crushed raw materials in proportion and mixing evenly;

[0047] Step B: Add polyvinyl alcohol to the mixed raw materials and stir evenly to form a paste-like material.

[0048] Step C: Extruding the paste material under a pressure of 10 MPa to obtain an adsorption material blank.

[0049] Step D: Dry the adsorption material blank at 80° C. for 4 hours, and then activate it at 300° C. for 4 hours to obtain a color-coated plate VOC adsorption material.

[0050] Embodiment 3:

[0051] A new type of VOC adsorption material for color-coated plates and a preparation method thereof, the material components and the preparation method thereof are as follows:

[0052] Step A, weighing 50 parts of activated carbon fiber, 10 parts of nano titanium dioxide, 20 parts of zeolite molecular sieve, 10 parts of palygorskite, 5 parts of sodium carboxymethyl cellulose and 5 parts of polyvinyl alcohol; respectively crushing the activated carbon fiber, nano titanium dioxide, zeolite molecular sieve and palygorskite to 300 mesh, adding 10 parts of silicate cement to the crushed raw materials in proportion and mixing evenly.

[0053] Step B: adding sodium carboxymethyl cellulose and polyvinyl alcohol to the mixed raw materials, stirring evenly to form a paste material.

[0054] Step C: Extruding the paste material under a pressure of 20 MPa to obtain an adsorption material blank.

[0055] Step D: Dry the adsorption material blank at 120° C. for 2 hours, and then activate it at 500° C. for 2 hours to obtain a color-coated plate VOC adsorption material.

[0056] Comparative Example 1:

[0057] A new type of VOC adsorption material for color-coated plates and a preparation method thereof, the material components and the preparation method thereof are as follows:

[0058] Step A. Weigh 60 parts of activated carbon fiber, 5 parts of nano titanium dioxide, 5 parts of zeolite molecular sieve, 5 parts of palygorskite, and 5 parts of sodium carboxymethyl cellulose, crush the activated carbon fiber, nano titanium dioxide, zeolite molecular sieve, and palygorskite to 200 mesh, add 10 parts of silicate cement to the crushed raw materials in proportion and mix them evenly;

[0059] Step B: Add sodium carboxymethyl cellulose to the mixed raw materials and stir evenly to form a paste.

[0060] Step C: Extruding the paste material under a pressure of 15 MPa to obtain an adsorption material blank.

[0061] Step D: Dry the adsorption material blank at 100° C. for 3 hours, and then activate it at 400° C. for 3 hours to obtain a color-coated plate VOC adsorption material.

[0062] Comparative Example 2:

[0063] A new type of VOC adsorption material for color-coated plates and a preparation method thereof, the material components and the preparation method thereof are as follows:

[0064] Step A. Weigh 20 parts of activated carbon fiber, 25 parts of nano titanium dioxide, 25 parts of zeolite molecular sieve, 25 parts of palygorskite, and 10 parts of polyvinyl alcohol, and crush the activated carbon fiber, nano titanium dioxide, zeolite molecular sieve, and palygorskite to 100 mesh respectively, and add 12 parts of silicate cement to the crushed raw materials in proportion and mix them evenly.

[0065] Step B: Add polyvinyl alcohol to the mixed raw materials and stir evenly to form a paste.

[0066] Step C: Extruding the paste material under a pressure of 10 MPa to obtain an adsorption material blank.

[0067] Step D: drying the adsorption material blank at 80° C. for 4 hours, and then activating it at 300° C. for 4 hours to obtain a color-coated plate VOC adsorption material.

[0068] The performance of the color-coated VOC adsorption materials prepared in Examples 1-3 and Comparative Examples 1-2 was compared, including adsorption capacity and test results, as shown in the following table:

[0069]

[0070] Among them, in the above table, the selectivity coefficient is an indicator to measure the selective adsorption capacity of the adsorbent material for specific VOC molecules. Good selectivity means that the adsorbent material can preferentially adsorb specific VOC molecules, rather than indiscriminately adsorbing all substances. The higher the selectivity coefficient, the stronger the adsorption capacity and selectivity of the adsorbent material for the target VOC molecules, and the more accurately it can adsorb the VOC molecules that need to be removed, thereby reducing the adsorption of other irrelevant substances. This is conducive to improving the adsorption efficiency and service life of the adsorbent material, making the adsorption process more targeted, and can play a better role in dealing with VOCs released by color-coated plates.

[0071] It can be seen from the test results that the VOC adsorption material for color-coated plates of the present invention has high adsorption capacity, selectivity and photocatalytic decomposition rate, and can effectively treat VOCs released by color-coated plates.

[0072] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0073] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. A new type of VOC adsorption material for color-coated plates, characterized in that: The raw materials used in the adsorption material are as follows: 30-50 parts by weight of activated carbon fiber, 10-20 parts by weight of nano titanium dioxide, 10-20 parts by weight of zeolite molecular sieve, 10-20 parts by weight of palygorskite, 8-15 parts by weight of silicate cement and 5-10 parts by weight of binder.

2. The novel VOC adsorption material for color-coated plate according to claim 1 is characterized in that: The specific surface area of ​​the activated carbon fiber is 1500-2000m2 / g, and the micropore volume is 0.5-1.0cm3 / g.

3. The novel VOC adsorption material for color-coated plate according to claim 1 is characterized in that: The particle size of the nano titanium dioxide is 20-50nm.

4. The novel VOC adsorption material for color-coated plate according to claim 1 is characterized in that: The zeolite molecular sieve is one or both of ZSM-5 molecular sieve and Y-type molecular sieve.

5. The novel VOC adsorption material for color-coated plate according to claim 1 is characterized in that: The specific surface area of ​​the palygorskite is 100-200 m2 / g.

6. The novel VOC adsorption material for color-coated plate according to claim 1 is characterized in that: The binder is one or both of sodium carboxymethyl cellulose and polyvinyl alcohol.

7. A method for preparing a novel VOC adsorption material for color-coated plates, characterized in that: The following steps are involved: Step A, crushing activated carbon fiber, nano titanium dioxide, zeolite molecular sieve, and palygorskite to 100-300 meshes respectively, and uniformly mixing the crushed raw materials with silicate cement according to proportion; Step B, adding a binder to the mixed raw materials, stirring evenly to form a paste-like material; Step C, extruding the paste material to obtain an adsorption material blank; Step D, drying the adsorption material blank at 80-120° C. for 2-4 hours, and then activating it at 300-500° C. for 2-4 hours to obtain a color-coated plate VOC adsorption material; Step E: cutting and packaging the activated adsorption material to obtain a finished product.

8. The method for preparing VOC adsorption material for color-coated plate according to claim 7, characterized in that: The amount of the binder added is 5-10% of the total weight of the mixed raw materials.

9. The method for preparing VOC adsorption material for color-coated plate according to claim 7, characterized in that: The extrusion molding pressure is 10-20 MPa.

10. Use of the VOC adsorption material for color-coated plates according to any one of claims 1 to 6 in VOC treatment of color-coated plates.

Images