Multi-component graphene composite active manganese formaldehyde decomposition sheet
By using a three-layer structure design and a roughening process on the multi-element graphene composite active manganese formaldehyde decomposition sheet, the problems of high density and insufficient contact area of existing materials are solved, achieving a highly efficient formaldehyde decomposition effect. It is suitable for indoor air treatment and air purifier filters.
Patent Information
- Application Number
- CN202423246576.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Existing formaldehyde decomposition materials have insufficient decomposition efficiency due to their high density and limited air contact area, which affects the speed of indoor air quality improvement and brings health risks.
The three-layer structure design of the multi-element graphene composite active manganese formaldehyde decomposition sheet is adopted. The bottom layer, middle layer and top layer are made of PET fiber. The middle layer is coated with graphene composite active manganese paste and formed into a whole by negative pressure suction and hot pressing. Combined with the roughening treatment, the pore structure and contact area are optimized.
It significantly improves the adsorption and decomposition capacity of formaldehyde, shortens the decomposition time, and is suitable for filter elements of indoor formaldehyde treatment and air purification equipment, thus improving decomposition efficiency.
Smart Images
Figure CN223628410U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to formaldehyde decomposition technical field, concretely relates to a kind of multi-element graphene composite active manganese formaldehyde decomposition piece. BACKGROUND
[0002] At present, the formaldehyde decomposition material widely used in market is mainly prepared by padding process. This process is relatively mature after long-term development, easy to operate, and low in cost, so it has been widely applied in industrial production. However, with the increasing requirement for formaldehyde decomposition efficiency, the limitations of this process have gradually appeared, mainly existing the following problems:
[0003] 1) High density: the formaldehyde decomposition material prepared by padding process often has high density, which means that there are fewer pores in the material, and the structure is relatively compact. The lack of pore structure directly limits the entry and decomposition of formaldehyde.
[0004] 2) Limited air contact area: high density and underdeveloped pore structure result in limited air contact area of the material. Formaldehyde decomposition is a chemical reaction process that requires sufficient air contact. The lack of contact area directly affects the decomposition efficiency.
[0005] Due to the above problems, the formaldehyde decomposition material on the market has obvious deficiencies in decomposition efficiency, which not only affects the improvement speed of indoor air quality, but also may cause health risks. Therefore, in order to solve the above problems, it is particularly important to develop a new type of formaldehyde decomposition piece. SUMMARY
[0006] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a multi-element graphene composite active manganese formaldehyde decomposition piece. Through the unique three-layer structure design, the stability of the structure is ensured, and the pore structure is optimized through the combination of different fiber layers, which is beneficial to the diffusion and reaction of gas molecules and improves the formaldehyde decomposition efficiency.
[0007] The technical scheme of the utility model is as follows:
[0008] The multi-element graphene composite active manganese formaldehyde decomposition piece comprises a bottom layer, an intermediate layer and a top layer, the bottom layer, the intermediate layer and the top layer are all made of fibers, and the fiber fineness of the bottom layer and the top layer is smaller than that of the intermediate layer; graphene composite active manganese paste is coated on the fibers of the intermediate layer, and the fibers of the bottom layer and the top layer respectively pass through the fibers of the intermediate layer to the other side.
[0009] Preferably, the fibers of the bottom layer, the intermediate layer and the top layer are PET fibers.
[0010] Preferably, the fiber fineness of the bottom layer and the top layer is 0.4-1 dtex, and the fiber fineness of the middle layer is 1.8-3 dtex.
[0011] Preferably, the fibers of the bottom layer and the top layer pass through the fibers of the middle layer to the other side by means of negative pressure suction.
[0012] Preferably, after the fibers of the bottom layer and the top layer pass through the fibers of the middle layer to the other side, the bottom layer, the middle layer and the top layer are formed into an integral whole by hot pressing.
[0013] Preferably, the outer surfaces of the bottom layer and the top layer are respectively subjected to sanding treatment.
[0014] Preferably, the mass ratio of the total mass of the fibers of the bottom layer, the middle layer and the top layer to the mass of the graphene composite active manganese glue slurry is 1:(0.2-0.6).
[0015] Preferably, the mass ratio of the total mass of the fibers of the bottom layer and the top layer to the mass of the fibers of the middle layer is (1-3):1.
[0016] Compared with the prior art, the utility model has the following beneficial effects:
[0017] 1. The multi-element graphene composite active manganese formaldehyde decomposition piece of the utility model, through the unique three-layer structure design, guarantees the stability of the structure, and optimizes the pore structure through the combination of different fiber layers, is favorable for the diffusion and reaction of gas molecules, improves the formaldehyde decomposition efficiency. The glue slurry coated in the middle layer adopts graphene composite active manganese glue slurry, so that the multi-element graphene and active manganese components are uniformly distributed in the fibers, the two synergistically act, significantly improve the adsorption and decomposition capacity of formaldehyde, effectively shorten the formaldehyde decomposition time, be applicable to indoor formaldehyde management and the filter core of equipment such as air conditioner, air purifier, have wide market application prospect.
[0018] 2. The utility model discloses a multi-element graphene composite active manganese formaldehyde decomposition piece is sanded, can further increase the roughness of surface, greatly improves the contact area with air, thereby improving the formaldehyde decomposition efficiency. ACCURACY OF DRAWINGS
[0019] Figure 1 It is the side view of the multi-element graphene composite active manganese formaldehyde decomposition piece of the utility model.
[0020] Figure 2 It is the plan view of the multi-element graphene composite active manganese formaldehyde decomposition piece of the utility model.
[0021] Figure 3 It is the schematic view when the fiber of the bottom layer or the top layer is suctioned to the other side through the middle layer in the embodiment 1 of the utility model.
[0022] In the diagram, 1 represents the bottom layer; 2 represents the middle layer; 3 represents the top layer; and 4 represents the fiber. Detailed Implementation
[0023] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model.
[0024] Example 1
[0025] like Figures 1-2 As shown, this embodiment provides a multi-element graphene composite active manganese formaldehyde decomposition sheet, which has a three-layer structure, including a bottom layer 1, a middle layer 2 and a top layer 3. The bottom layer 1, the middle layer 2 and the top layer 3 are all made of PET fibers, and the fiber 4 of the bottom layer 1 and the top layer 3 has a fineness of 0.4-1 dtex, while the fiber 4 of the middle layer 2 has a fineness of 1.8-3 dtex. The fiber 4 of the middle layer 2 is coated with graphene composite active manganese adhesive, and the fiber 4 of the bottom layer 1 and the top layer 3 respectively pass through the fiber 4 of the middle layer 2 to reach the other side.
[0026] In this embodiment, the graphene-supported active manganese adhesive is composed of the following components: 50 wt.% graphene-supported active manganese, 25 wt.% aqueous polyurethane emulsion, 24 wt.% water, 0.4 wt.% dispersant 760W (Dega), 0.3 wt.% leveling agent Lutensol A7N (BASF), and 0.3 wt.% defoamer 810 (Dega). The synthesis method of the graphene-supported active manganese is as follows:
[0027] S1 was reacted with 50 wt.% concentrated sulfuric acid (98 wt.%), 30 wt.% flake graphite (325 mesh), and 20 wt.% potassium permanganate at 65 °C for 24 h to obtain mixture one;
[0028] S2 adds cerium oxide and sodium hydroxide sequentially to mixture one, adjusting the pH to 7.5 to obtain mixture two; the mass ratio of cerium oxide to sodium hydroxide is 1:0.5.
[0029] After the S3 mixture was aged for 48 hours, the supernatant was discarded, the precipitate was centrifuged, and then washed until the pH of the 1 wt.% aqueous dispersion was 7. Then it was dried at 120°C to obtain the dried product.
[0030] S4 The dried material was placed in a tube furnace and sintered under a nitrogen-oxygen mixed atmosphere to obtain graphene-supported active manganese; wherein the volume ratio of nitrogen to oxygen was 9:1, the sintering temperature was 550℃, and the sintering time was 3h. The obtained graphene-supported active manganese had Mn:O=1:2.1 and C content of 7wt.%.
[0031] The preparation method of the multi-element graphene composite active manganese formaldehyde decomposition sheet of the present embodiment is as follows:
[0032] First, the graphene composite active manganese paste is coated on the fibers 4 of the intermediate layer 2, and the graphene composite active manganese paste is not dried through while the fibers 4 of the intermediate layer 2 are fixed. Then, a layer of PET fiber is placed on the intermediate layer 2, and the two are placed on a screen with a mesh size of 120-200. The lower end of the screen is connected to a vacuum pump to ensure that the air pressure is -0.05~-0.15MPa. The upper layer of PET fiber is made to pass through the intermediate layer 2 to the other side (as shown in Figure 3 ) by negative pressure suction to form a preliminary loose structure, and then heat pressing is performed at 150℃ and 0.25-0.28MPa to fix the shape. Then, the layer of PET fiber and the intermediate layer 2 are turned over, and a layer of PET fiber is placed on the other side of the intermediate layer 2. After negative pressure suction and heat pressing are performed in turn, a three-layer structure is obtained. Finally, drying is performed to obtain the multi-element graphene composite active manganese formaldehyde decomposition sheet.
[0033] The gram weight, thickness, etc. of the multi-element graphene composite active manganese formaldehyde decomposition sheet can be determined according to actual needs. In the present embodiment, the gram weight of the multi-element graphene composite active manganese formaldehyde decomposition sheet is controlled to be 85-180g / m 2 , and the thickness is 0.4-0.8mm. The mass ratio of the total mass of the fibers 4 of the bottom layer 1, the intermediate layer 2 and the top layer 3 to the mass of the graphene composite active manganese paste is 1:(0.2-0.6), and the mass ratio of the total mass of the fibers 4 of the bottom layer 1 and the top layer 3 to the mass of the fibers 4 of the intermediate layer 2 is (1-3):1.
[0034] The formaldehyde decomposition sheet of the present embodiment utilizes the combination of fine fibers 4 and coarse fibers 4 to not only ensure the strength of the structure but also optimize the internal pores, which is conducive to the diffusion and reaction of gas molecules. At the same time, the intermediate layer 2 is coated with graphene composite active manganese paste, and the multi-element graphene and active manganese components are uniformly distributed in the fibers 4. The synergistic effect of the two significantly improves the adsorption and decomposition capacity of formaldehyde, effectively shortens the formaldehyde decomposition time, and is suitable for indoor formaldehyde treatment as well as filter cartridges of air conditioners, air purifiers and other equipment, which has a broad market application prospect.
[0035] Example 2
[0036] On the basis of Example 1, the outer surfaces of the bottom layer 1 and the top layer 3 are subjected to sanding treatment, and the specific operation is as follows: the formaldehyde decomposition sheet is subjected to sanding treatment by a sanding machine, and the sanding machine uses 400-800 mesh sandpaper to treat the formaldehyde decomposition sheet at a vehicle speed of 4-8m / min and a sanding roller speed of 200-400rpm. Sanding treatment of the multi-element graphene composite active manganese formaldehyde decomposition sheet can further increase the roughness of the surface and greatly improve the contact area with air, thereby improving the formaldehyde decomposition efficiency.
Claims
1. A multi-element graphene composite active manganese formaldehyde decomposition sheet, characterized by, It comprises a bottom layer (1), a middle layer (2) and a top layer (3), the bottom layer (1), the middle layer (2) and the top layer (3) are all made of fibers (4), and the fineness of the fibers (4) of the bottom layer (1) and the top layer (3) is smaller than that of the middle layer (2); the fibers (4) of the middle layer (2) are coated with graphene composite active manganese paste, and the fibers (4) of the bottom layer (1) and the top layer (3) respectively pass through the fibers (4) of the middle layer (2) to the other side.
2. The multi-element graphene composite active manganese formaldehyde decomposition sheet according to claim 1, characterized in that, The fibers (4) of the bottom layer (1), the middle layer (2) and the top layer (3) are PET fibers.
3. The multi-element graphene composite active manganese formaldehyde decomposition sheet according to claim 1, wherein the graphene composite active manganese formaldehyde decomposition sheet is a graphene composite active manganese formaldehyde decomposition sheet in which the active manganese formaldehyde decomposition sheet is coated with a graphene composite layer. The fineness of the fibers (4) of the bottom layer (1) and the top layer (3) is 0.4-1dtex, and the fineness of the fibers (4) of the middle layer (2) is 1.8-3dtex.
4. The multi-element graphene composite active manganese formaldehyde decomposition sheet according to claim 1, wherein the graphene composite active manganese formaldehyde decomposition sheet is a graphene composite active manganese formaldehyde decomposition sheet in which the active manganese formaldehyde decomposition sheet is coated with a graphene composite layer. The fibers (4) of the bottom layer (1) and the top layer (3) pass through the fibers (4) of the middle layer (2) to the other side by negative pressure suction.
5. The multi-element graphene composite active manganese formaldehyde decomposition sheet according to claim 1, wherein the graphene composite active manganese formaldehyde decomposition sheet is a graphene composite active manganese formaldehyde decomposition sheet in which the active manganese formaldehyde decomposition sheet is coated with a graphene composite layer. After the fibers (4) of the bottom layer (1) and the top layer (3) pass through the fibers (4) of the middle layer (2) to the other side, the bottom layer (1), the middle layer (2) and the top layer (3) are formed into a whole by hot pressing.
6. The multi-element graphene composite active manganese formic acid decomposition sheet according to claim 1, wherein The outer surfaces of the bottom layer (1) and the top layer (3) are respectively subjected to sanding treatment.
7. The multi-element graphene composite active manganese formic acid decomposition sheet according to claim 1, wherein the graphene composite active manganese formic acid decomposition sheet is a graphene composite active manganese formic acid decomposition sheet in which the active manganese formic acid decomposition sheet is coated with a graphene composite layer. The total mass ratio of the fibers (4) of the bottom layer (1), the middle layer (2) and the top layer (3) to the mass of the graphene composite active manganese paste is 1:(0.2-0.6).
8. The multi-element graphene composite active manganese formaldehyde decomposition sheet according to claim 1, wherein, The total mass ratio of the fibers (4) of the bottom layer (1) and the top layer (3) to the mass of the fibers (4) of the middle layer (2) is (1-3):1.