Adsorbing material as well as preparation method and application thereof

Abstract

The invention provides an adsorption material as well as a preparation method and application thereof, and relates to the technical field of adsorption materials. The adsorption material provided by the invention is prepared from the following raw materials in percentage by mass: 8 to 40 percent of hollow two-component fiber, 10 to 35 percent of profiled fiber, 4 to 20 percent of reinforced fiber, 37.5 to 70 percent of adsorption medium, 5 to 20 percent of modifier and 0 to 6 percent of enhancer. The hollow double-component fibers and the profiled fibers are adopted at the same time, the adhesion rate of the superfine adsorption medium is increased, the content of the superfine adsorption medium is high, the adsorption strength is high, and the obtained adsorption material is higher in adsorption efficiency and adsorption capacity; meanwhile, the thickness of the adsorption material can be thinner, so that the adsorption resistance is reduced. The adsorption material provided by the invention can efficiently realize air purification (such as deodorization). The invention also provides a preparation method of the adsorption material according to the technical scheme, the process is simple, the cost is low, and the loss of the adsorption medium in the papermaking process can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of adsorption materials, and particularly relates to an adsorption material, a preparation method thereof, and an application thereof. Background Art

[0002] The use of air purifiers can effectively remove indoor odors, such as adsorbing and decomposing harmful gases such as TVOC, formaldehyde, acetaldehyde, acetic acid, ammonia, acetic acid, etc. The core of air purifier adsorption is activated carbon adsorption materials. At present, people are paying more and more attention to the air environment of their homes, so the performance requirements for air purifier adsorption materials are also further improved.

[0003] Traditional adsorption materials are mainly carbon-loaded non-woven fabrics, which are mainly composed of two layers of activated carbon with a mesh size below 200 (i.e., a particle size greater than 74 μm) sandwiching a non-woven fabric for support and composite. Carbon-loaded non-woven fabrics can only use relatively coarse activated carbon. Although the carbon content can be increased, the adsorption efficiency is low; at the same time, due to the relatively thick carbon-loaded cloth, the resistance of the filter element after folding and processing is large. Making activated carbon paper into a paper honeycomb for air purifier adsorption has the advantages of low resistance and long cycle life compared with carbon-loaded non-woven fabrics. In order to improve the adsorption performance, the paper honeycomb can use ultra-fine activated carbon (above 1000 mesh, i.e., a particle size below 13 μm), but its loading amount of ultra-fine activated carbon is relatively low (usually below 10%), resulting in a low adsorption amount. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an adsorption material, a preparation method thereof, and an application thereof. The content of the ultra-fine adsorption medium in the adsorption material provided by the present invention is high (37.5 - 70%), and the adsorption material has a large adsorption amount and low resistance.

[0005] In order to achieve the above-mentioned invention purpose, the present invention provides the following technical solutions:

[0006] The present invention provides an adsorption material, comprising the following preparation raw materials in mass percentage:

[0007] 8 - 40% of hollow bicomponent fibers, 10 - 35% of profiled fibers, 4 - 20% of reinforcing fibers, 37.5 - 70% of adsorption medium, 5 - 20% of modifier, 0 - 6% of reinforcing agent; the hollow bicomponent fibers are hollow tubular, and one semi-circle of the hollow tube is made of high melting point fibers, and the other semi-circle is made of low melting point fibers; the adsorption medium includes ultra-fine activated carbon particles, and the mesh number of the ultra-fine activated carbon particles is 15000 - 20000 mesh.

[0008] Preferably, the high melting point fibers are made of PET with a melting point of 240 - 260 °C; the low melting point fibers are made of COPET with a melting point of 150 - 180 °C.

[0009] Preferably, the hollow bicomponent fiber has a fiber fineness of 0.2 to 2.0 D and a length of 3 to 9 mm.

[0010] Preferably, the profiled fiber is made of polyester, terylene or nylon; the cross-section of the profiled fiber is cruciform, octagonal, trilobal, quadrilobal or octagonal gear-shaped; the profiled fiber has a fiber fineness of 0.2 to 2.0 D and a length of 3 to 9 mm.

[0011] Preferably, the reinforcing fiber includes one or more of PVA fiber, SWP pulp, wood pulp fiber, tencel fiber and aramid fibrillated fiber; the fiber diameter of the reinforcing fiber is 3 to 20 μm and the length is 3 to 9 mm.

[0012] Preferably, the adsorption medium further includes activated carbon fiber and / or photocatalyst; the diameter of the activated carbon fiber is 10 to 30 μm, the length is 3 to 12 mm, and the specific surface area ≥ 1500 m 2 / g; the particle size of the photocatalyst is 5 to 50 nm.

[0013] Preferably, the modifier includes one or more of amino alcohol, potassium permanganate, zinc ricinoleate, urea phosphate and silane coupling agent; the intensifier includes one or more of water-soluble polyester, styrene / acrylic acid copolymer, acrylic polymer resin, vinyl acetate, epoxy resin and phenolic resin.

[0014] The present invention provides a preparation method of the adsorption material described in the above technical solutions, including the following steps:

[0015] Mix the hollow bicomponent fiber, profiled fiber, reinforcing fiber and water to obtain a mixed suspension slurry;

[0016] After wet forming the mixed suspension slurry, perform the first drying to obtain a fiber base paper; the temperature of the first drying melts the low-melting fiber in the hollow bicomponent fiber;

[0017] Mix the adsorption medium, modifier, intensifier and water to obtain a mixed dispersion liquid;

[0018] Immerse the fiber base paper with the mixed dispersion liquid and then perform the second drying to obtain the adsorption material.

[0019] The present invention provides a preparation method of the adsorption material described in the above technical solutions, including the following steps:

[0020] Mix the hollow bicomponent fiber, profiled fiber, reinforcing fiber, adsorption medium, modifier, intensifier and water to obtain a mixed suspension slurry;

[0021] Suction the mixed suspension slurry onto a forming wire mold to obtain a wet paper embryo;

[0022] Dry the wet paper embryo to obtain the adsorbent material; the drying temperature causes the low-melting-point fibers in the hollow bicomponent fibers to melt.

[0023] The present invention provides the use of the adsorbent material described in the above technical solution or the adsorbent material prepared by the preparation method described in the above technical solution in air purification.

[0024] The present invention provides an adsorbent material, comprising the following raw materials for preparation in mass percentage: 8-40% of hollow bicomponent fibers, 10-35% of profiled fibers, 4-20% of reinforcing fibers, 37.5-70% of an adsorption medium, 5-20% of a modifier, and 0-6% of a strengthening agent; the adsorption medium comprises ultrafine activated carbon particles, and the mesh number of the ultrafine activated carbon particles is 15,000-20,000 meshes. In the present invention, after the low-melting-point component in the hollow bicomponent fibers melts, the remaining high-melting-point part presents a semi-circular hollow shape, which can load more adsorption media while providing bonding strength; the profiled fibers are beneficial to the adsorption medium being loaded in the grooves, improving the loading amount of the adsorption medium without affecting the pores of the adsorbent material (enabling the adsorbent material to have good air permeability). The present invention simultaneously uses hollow bicomponent fibers and profiled fibers, improving the adhesion rate of the ultrafine adsorption medium, resulting in a high content of the ultrafine adsorption medium (ultrafine activated carbon particles) and high adsorption strength. The obtained adsorbent material has a faster adsorption efficiency and a higher adsorption capacity; at the same time, it can make the thickness of the adsorbent material thinner, thereby reducing the adsorption resistance. The adsorbent material provided by the present invention can efficiently achieve air purification (such as deodorization). In addition, the formula of the adsorbent material provided by the present invention is simple and easy to adjust. The results of the examples show that the formaldehyde removal and ammonia removal efficiencies of the adsorbent material provided by the present invention can reach more than 95.0% respectively.

[0025] The present invention provides a preparation method of the adsorbent material described in the above technical solution, comprising the following steps: mixing the hollow bicomponent fibers, profiled fibers, reinforcing fibers and water to obtain a mixed suspension slurry; subjecting the mixed suspension slurry to wet forming and then first drying to obtain a fiber base paper; mixing the adsorption medium, modifier, strengthening agent and water to obtain a mixed dispersion liquid; impregnating the fiber base paper with the mixed dispersion liquid and then performing second drying to obtain the adsorbent material. In the present invention, the adsorbent material obtained by this preparation method is an adsorption paper. The present invention uses the mixed dispersion liquid obtained by mixing the adsorption medium, modifier, strengthening agent and water to impregnate the fiber paper sheet, that is, adopts the carbon impregnation process, which can reduce the loss of the adsorption medium during the papermaking process; and the preparation process is simple, with less pollution and low cost.

[0026] The present invention provides another preparation method for the adsorption material described in the above technical solution, including the following steps: mixing the hollow bicomponent fiber, profiled fiber, reinforcing fiber, adsorption medium, modifier, reinforcing agent and water to obtain a mixed suspension slurry; sucking the mixed suspension slurry onto a forming wire mold to obtain a wet paper embryo; drying the wet paper embryo to obtain the adsorption material. In the present invention, the adsorption material obtained by this preparation method is a honeycomb filter plate. The present invention adopts a one-time mold forming process (i.e., an integrated mold forming process) to prepare the honeycomb filter plate. This method is simple and convenient, has a high qualified rate, low cost, can reduce the loss of the adsorption medium during the papermaking process, and can flexibly customize the integrated mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the hollow bicomponent fiber loading the adsorption medium in the semi-hollow groove after the melting of the low melting point fiber therein;

[0028] Figure 2 Schematic diagram of the nylon octagonal gear-shaped (i.e., octagonal tooth-shaped) profiled fiber groove loading the adsorption medium;

[0029] Figure 3 Schematic diagram of the one-time forming pulp tank device for preparing the wet paper embryo in the embodiment of the present invention;

[0030] Figure 4 Schematic diagram of the structure of the forming wire mold. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The present invention provides an adsorption material, including the following raw materials for preparation in mass percentage:

[0032] 8-40% of hollow bicomponent fiber, 10-35% of profiled fiber, 4-20% of reinforcing fiber, 37.5-70% of adsorption medium, 5-20% of modifier, 0-6% of reinforcing agent; the hollow bicomponent fiber is hollow tubular, one semicircle of the hollow tube is made of high melting point fiber, and the other semicircle is made of low melting point fiber; the adsorption medium includes ultra-fine activated carbon particles, and the mesh number of the ultra-fine activated carbon particles is 15,000-20,000 mesh.

[0033] In the present invention, unless otherwise specified, the raw materials involved are all well-known commercially available products in the art.

[0034] By mass percentage, the raw materials for preparing the adsorption material provided by the present invention include 8-40% of hollow bicomponent fibers (also known as hollow bimetallic melting point fibers), which can be 8%, 10%, 16%, 20%, 24%, 30% or 40%. In the present invention, the hollow bicomponent fiber is in a hollow tubular shape, with one semi-circle of the hollow tube being a high melting point fiber and the other semi-circle being a low melting point fiber; the material of the high melting point fiber is preferably PET, and the melting point is preferably 240-260 °C; the material of the low melting point fiber is preferably COPET (i.e., the hollow bicomponent fiber is COPET / PET fiber), and the melting point is preferably 150-180 °C; the fiber fineness of the hollow bicomponent fiber is preferably 0.2-2.0 D, which can be 0.2, 0.5, 1, 1.3, 1.4, 1.5 or 2.0 D, and the length is preferably 3-9 mm, which can be 4, 5, 6, 7 or 8 mm; in the embodiments of the present invention, the hollow bicomponent fiber is purchased from Yizheng Xiangheng Polyester Technology Co., Ltd. (type FDY, grade XHLC64534). In the present invention, after the low melting point fiber in the hollow bicomponent fiber melts, it presents a semi-hollow shape (i.e., a semi-hollow groove shape), and the melted low melting point fiber provides bonding strength, while the semi-hollow structure can load more adsorption media. Figure 1 Schematic diagram of the semi-hollow groove of the hollow bicomponent fiber loaded with adsorption media after the melting of its low melting point fiber.

[0035] By mass percentage, the raw materials for preparing the adsorption material provided by the present invention include 10-35% of profiled fibers, which can be 10%, 12%, 15%, 20%, 25%, 28% or 35%. In the present invention, the material of the profiled fiber is preferably polyester, polyethylene terephthalate or nylon; the cross-section of the profiled fiber is preferably cross-shaped, octagonal, trilobal, quadrilobal or octagonal gear-shaped; the fiber fineness of the profiled fiber is preferably 0.2-2.0 D, which can be 0.2, 0.5, 1.0, 1.5 or 2.0 D, and the length is preferably 3-9 mm, which can be 4, 5, 6, 7 or 8 mm. In the embodiments of the present invention, the profiled fiber is nylon octagonal gear profiled fiber (purchased from Nantong Yongsheng Huvis Fiber New Materials Co., Ltd., grade NHP) and / or polyester cross-shaped fiber (POY, Shaoxing Xinen Textile Technology Co., Ltd.); when the profiled fiber is nylon octagonal gear profiled fiber and polyester cross-shaped fiber, the mass ratio of the nylon octagonal gear profiled fiber to the polyester cross-shaped fiber can be 2.5:1. In the present invention, the profiled fiber is more conducive to the adsorption media being loaded into its grooves. By increasing the fiber surface area, more adsorption media can be loaded, improving the adsorption media loading amount without affecting the pores of the adsorption material. Figure 2 Schematic diagram of the groove of the nylon octagonal gear-shaped (i.e., octagonal tooth-shaped) profiled fiber loaded with adsorption media.

[0036] In terms of mass percentage, the raw materials for preparing the adsorption material provided by the present invention include 4-20% of reinforcing fibers, which can be 4%, 5%, 10%, 15% or 20%. In the present invention, the reinforcing fibers preferably include one or more of PVA fibers, SWP pulp, wood pulp fibers, Tencel fibers and aramid fibrillated fibers (the reinforcing fibers are all circular fibers); the fiber diameter of the reinforcing fibers is preferably 3-20 μm, which can be 3, 5, 10, 15 or 20 μm, and the length is preferably 3-9 mm, which can be 4, 5, 6, 7 or 8 mm. In the embodiments of the present invention, the reinforcing fibers are Tencel fibers and / or water-soluble PVA fibers with a beating degree of 35°SR; when the reinforcing fibers are Tencel fibers and water-soluble PVA fibers, the mass ratio of the Tencel fibers to the water-soluble PVA fibers can be 1:1. In the present invention, the reinforcing fibers can additionally provide paper stiffness and improve the binding force between paper fibers.

[0037] In terms of mass percentage, the raw materials for preparing the adsorption material provided by the present invention include 37.5-70% of an adsorption medium, which can be 37.5%, 40%, 45%, 47%, 48%, 50%, 60% or 70%. In the present invention, the adsorption medium includes ultra-fine activated carbon particles, and the mesh number of the ultra-fine activated carbon particles is 15,000-20,000 meshes, which can be 15,000, 16,000, 17,000, 18,000, 19,000 or 20,000 meshes. In the present invention, the adsorption medium also preferably includes activated carbon fibers and / or photocatalysts; the mass ratio of the activated carbon fibers and / or photocatalysts to the ultra-fine activated carbon particles is preferably 1:2-15; the diameter of the activated carbon fibers is preferably 10-30 μm, which can be 10, 15, 20, 25 or 30 μm, and the length is preferably 3-12 mm, which can be 3, 5, 10 or 12 mm, and the specific surface area (BET) ≥ 1500 m 2 / g; the particle size of the photocatalyst is preferably 5-50 nm, which can be 5, 10, 20, 30, 40 or 50 nm, and the photocatalyst can be a titanium dioxide-based photocatalyst. In the present invention, the activated carbon fibers have a large specific surface area and can quickly adsorb harmful gases, improving the deodorization efficiency; the function of the photocatalyst is to chemically react with harmful gases such as formaldehyde and TVOC to improve the removal rate of formaldehyde.

[0038] In terms of mass percentage, the raw materials for preparing the adsorption material provided by the present invention include 5-20% of a modifier, which can be 5%, 7.5%, 9%, 9.5%, 10%, 15% or 20%. In the present invention, the modifier preferably includes one or more of amino alcohol, potassium permanganate, zinc ricinoleate, urea phosphate and silane coupling agent. The amino alcohol is preferably aminoethanol and / or amino triethanol, and the silane coupling agent is preferably one or more of KH550, KH560 and KH570. In the embodiments of the present invention, the modifier is a mixture of amino alcohol and urea phosphate or a mixture of amino alcohol, zinc ricinoleate and urea phosphate. The mass ratio of amino alcohol to urea phosphate in the mixture of amino alcohol and urea phosphate can be 2:1, and the mass ratio of amino alcohol, zinc ricinoleate and urea phosphate in the mixture of amino alcohol, zinc ricinoleate and urea phosphate can be 1:1:1. In the present invention, the modifier mainly acts in the pores of the adsorption medium. When the pores of the adsorption medium adsorb harmful gases, the modifier components react chemically with them to completely remove odors (amino alcohol and zinc ricinoleate are suitable for reacting with formaldehyde, urea phosphate and silane coupling agent are suitable for reacting with ammonia, and potassium permanganate is suitable for reacting with both formaldehyde and ammonia).

[0039] In terms of mass percentage, the raw materials for preparing the adsorption material provided by the present invention include 0-6% of a reinforcing agent, which can be 1%, 2%, 2.5%, 3%, 4%, 5% or 6%. In the present invention, the reinforcing agent preferably includes one or more of water-soluble polyester, styrene / acrylic acid copolymer, acrylic polymer resin, vinyl acetate, epoxy resin and phenolic resin; the water-soluble polyester is preferably water-soluble alkyd resin. In the present invention, the reinforcing agent mainly plays a role in bonding and fixing the adsorption medium to prevent the adsorption medium from falling off under high flow rate and high humidity environments.

[0040] The raw materials for preparing the adsorption material provided by the present invention further include water, and the present invention has no special requirements for the amount of water used, as long as the adsorption material can be prepared smoothly.

[0041] In the present invention, the dosage of the adsorption material is preferably 150-220 g / m 2 and can be 150, 200 or 220 g / m 2In the present invention, the adsorbent material may be adsorbent paper (or activated carbon paper) or a honeycomb filter plate. The adsorbent material provided by the present invention has a high content of ultra-fine adsorbent medium (37.5-70%), faster adsorption efficiency and higher adsorption capacity. And compared with the carbon-containing non-woven fabric, the paper thickness of the adsorbent material provided by the present invention is thinner (the activated carbon particles of the traditional carbon-containing non-woven fabric are coarser, and a higher gram weight of activated carbon is required to ensure the adsorption performance to ensure the adsorption efficiency, so the composite carbon-containing non-woven fabric is thicker. However, the present invention uses ultra-fine adsorbent medium, with fast adsorption efficiency, small addition amount required and fine adsorbent medium particles, so the thickness of the required material is thinner), and the number of folds during folding can be increased under the same area, thereby reducing the filter element resistance.

[0042] The present invention provides a preparation method (denoted as Method 1) of the adsorbent material described in the above technical solution, including the following steps:

[0043] Mix the hollow bicomponent fiber, profiled fiber, reinforcing fiber and water to obtain a mixed suspension slurry;

[0044] Perform wet forming on the mixed suspension slurry and conduct the first drying to obtain a fiber base paper; the temperature of the first drying causes the low-melting fiber in the hollow bicomponent fiber to melt;

[0045] Mix the adsorbent medium, modifier, enhancer and water to obtain a mixed dispersion liquid;

[0046] After impregnating the fiber base paper with the mixed dispersion liquid, conduct the second drying to obtain the adsorbent material.

[0047] In the present invention, the hollow bicomponent fiber, profiled fiber, reinforcing fiber and water are mixed (denoted as the first mixing) to obtain a mixed suspension slurry. In the present invention, the solid content of the mixed suspension slurry is preferably 0.03-0.5 wt%. In the present invention, the method of the first mixing is preferably: mix the hollow bicomponent fiber, profiled fiber and reinforcing fiber to obtain a mixed fiber; place the mixed fiber in water, stir and then transfer it to a pre-forming tank to form a mixed suspension slurry. Before the mixing, the present invention preferably performs defibration and dispersion on the hollow bicomponent fiber, profiled fiber and reinforcing fiber respectively.

[0048] After obtaining the mixed suspension slurry, the present invention wet-forms the mixed suspension slurry and then performs the first drying to obtain a fibrous base paper. In the present invention, the wet-forming method is preferably: sending the mixed suspension slurry to the upper and lower head boxes of an inclined wire paper machine respectively, and performing one-time wet forming. In the present invention, the drying method of the first drying can be drying; the temperature of the first drying causes the low-melting-point fibers in the hollow bicomponent fibers to melt. In the embodiments of the present invention, the temperature of the first drying is 150-180 °C. After the first drying, the low-melting-point fibers in the hollow bicomponent fibers melt and bond to form a semi-grooved shape, and finally a high-strength and high-porosity fibrous base paper is obtained.

[0049] The present invention mixes an adsorption medium, a modifier, a reinforcing agent and water (denoted as the second mixing) to obtain a mixed dispersion. In the present invention, when the reinforcing agent is ethylene / acrylic acid copolymer, acrylic polymer resin, vinyl acetate, epoxy resin or phenolic resin, it can be added in the form of its corresponding emulsion. In the present invention, when the amount of the reinforcing agent is 0, the addition of the reinforcing agent is omitted. In the present invention, the total concentration of the adsorption medium, the modifier and the reinforcing agent in the mixed dispersion is preferably 15-30 wt%, and can be 15 wt%, 20 wt% or 30 wt%. The present invention has no special requirements for the method of the second mixing, and it is only necessary to mix each component evenly. In the embodiments of the present invention, the mixed dispersion is also referred to as an aqueous adsorption-enhanced mixed sizing material.

[0050] After obtaining the mixed dispersion impregnation and the fibrous base paper, the present invention impregnates the fibrous paper sheet with the mixed dispersion and then performs the second drying to obtain the adsorption material. In the present invention, the impregnation method is preferably roll coating or curtain coating. Taking roll coating as an example, the specific operation of the impregnation is preferably: pumping the mixed dispersion to a sizing machine, and uniformly impregnating the mixed dispersion onto the fibrous base paper through a roller. In the present invention, the present invention has no special requirements for the temperature of the second drying, as long as the moisture can be sufficiently removed, and it can be 100-130 °C. In the present invention, the second drying is preferably carried out in a drying cylinder to remove the moisture in the impregnated paper sheet. After the second drying, the obtained material can be wound into a roll.

[0051] In the present invention, the adsorption material prepared by the method one is an adsorption paper (or called activated carbon paper). The present invention first prepares a base paper with hollow bicomponent fibers, profiled fibers and reinforcing fibers, and then impregnates (such as roll coating) an ultra-fine adsorption medium, a modifier and a reinforcing agent onto the base paper; the method of the present invention has a low loss rate of the adsorption medium, a high loading amount and high strength, avoids the loss of activated carbon in other wet-forming schemes, and optimizes the papermaking process.

[0052] The present invention provides another preparation method (denoted as Method 2) for the adsorption material described in the above technical solution, including the following steps:

[0053] Mix the hollow bicomponent fiber, profiled fiber, reinforcing fiber, adsorption medium, modifier, reinforcing agent and water to obtain a mixed suspension slurry;

[0054] Suction the mixed suspension slurry onto a forming wire mold to obtain a wet paper embryo;

[0055] Dry the wet paper embryo to obtain the adsorption material; the drying temperature causes the low-melting-point fiber in the hollow bicomponent fiber to melt.

[0056] In the present invention, the hollow bicomponent fiber, profiled fiber, reinforcing fiber, adsorption medium, modifier, reinforcing agent and water are mixed (denoted as the third mixing) to obtain a mixed suspension slurry. In the present invention, when the reinforcing agent is ethylene / acrylic acid copolymer, acrylic polymer resin, vinyl acetate, epoxy resin or phenolic resin, it can be added in the form of its corresponding emulsion. In the present invention, when the dosage of the reinforcing agent is 0, the addition of the reinforcing agent is omitted. In the present invention, the solid content of the mixed suspension slurry is preferably 0.05 - 5 wt%. In the present invention, the method of the third mixing is preferably: after mixing the hollow bicomponent fiber, profiled fiber, reinforcing fiber, adsorption medium, modifier and reinforcing agent, place the obtained mixture in water, stir, and then transfer it to a one-step forming pulp tank to obtain a mixed suspension slurry.

[0057] After obtaining the mixed suspension slurry, in the present invention, the mixed suspension slurry is suctioned onto a forming wire mold to obtain a wet paper embryo. In the present invention, the mesh number of the forming wire mold is preferably 20 - 100 meshes. In the embodiments of the present invention, the forming wire mold is as Figure 4 shown, a reticular flat plate with 20 - 100 meshes (i.e., Figure 4 the slurry forming wire in), with a vacuum function, and several closed areas (which can be iron sheets) are provided on its reticular structure. When the paper sample dehydrates from the mesh holes, holes will be formed where there is no slurry in the closed areas, and it will become honeycomb-shaped after forming. Figure 3 is the one-step forming pulp tank device for preparing the wet paper embryo in the embodiments of the present invention, including a forming wire mold (i.e., Figure 3 the vacuum forming wire in) and a forming box body. The forming wire mold is connected to a fixed connection component, and the fixed connection component can lift and evacuate the forming wire mold. Through the lifting, the forming wire mold can extend into and out of the forming box body. In the embodiments of the present invention, the specific operation of the suction is preferably: extend the forming wire mold into the mixed suspension slurry (located in the one-step forming pulp tank, as Figure 3 shown), in the forming wire mold (such as Figure 4Under the suction of the vacuum function of the built-in vacuum pump (as shown), the mixed suspension slurry is formed on the forming wire mold, and a wet paper embryo is obtained on the forming wire mold.

[0058] After obtaining the wet paper embryo, the present invention dries the wet paper embryo to obtain the adsorption material. In the present invention, the drying temperature causes the low-melting-point fibers in the hollow bicomponent fibers to melt. In the embodiments of the present invention, the drying temperature is 150-180 °C. Preferably, the wet paper embryo together with the forming wire mold is transferred to a drying device, and the adsorption material is obtained after demolding after drying. After the drying, the low-melting-point fibers in the hollow bicomponent fibers melt and bond to form a semi-grooved shape.

[0059] In the present invention, the adsorption material prepared by the second method is a honeycomb filter plate. Currently, there are mainly two ways to prepare the activated carbon honeycomb filter plate sold on the market: Way 1: First, make a honeycomb structure with cardboard or aluminum plate, and then dip-coat adsorption media such as photocatalyst and zeolite on the surface for deodorization. This scheme requires too much binder, is prone to pore blockage, resulting in a reduction in adsorption efficiency. At the same time, the adsorption medium can only be loaded on the surface of the paper, and it is difficult to increase the loading amount, and the adsorption medium is also easy to fall off; Way 2: Mix an adsorption medium (such as activated carbon) with fibers to make paper, then process the activated carbon paper into a corrugated honeycomb shape, and finally spray a deodorization modifier on the cut honeycomb plate and dry it to obtain an adsorption plate. In this scheme, the ultra-fine particle size of activated carbon during the forming process of activated carbon paper will lead to a large loss rate, and it is also difficult to increase the carbon content. Moreover, both of the above two ways have the problem of complex processes. The present invention adopts a preparation method of an integrated honeycomb mesh (that is, a one-time mold forming process), directly forms a honeycomb wet paper embryo by paper molding after compounding hollow bicomponent fibers, profiled fibers, reinforcing fibers with ultra-fine adsorption media, modifiers and reinforcing agents, and then obtains an integrated honeycomb mesh (that is, a honeycomb filter plate) after drying. The present invention solves the problems of complex preparation process and large loss of the above honeycomb mesh, is simple and convenient to operate, has a high qualification rate, avoids the waste and cost problems of secondary processing of paper, and can directly replace the existing activated carbon paper honeycomb or aluminum honeycomb deodorization mesh.

[0060] The present invention provides the application of the adsorption material described in the above technology or the adsorption material prepared by the preparation method described in the above technical solution in air purification. The present invention has no special requirements for the method of the application, and the application methods well-known to those skilled in the art can be adopted. The adsorption material provided by the present invention can efficiently achieve air purification, such as for air deodorization.

[0061] In order to further illustrate the present invention, the adsorption material provided by the present invention, its preparation method and application will be described in detail below with reference to examples, but they cannot be understood as limiting the protection scope of the present invention.

[0062] The reagents and fibers used in the following examples are all commercially available.

[0063] Example 1

[0064] Step 1: Weigh 40 parts by mass of hollow bicomponent fibers (type FDY, grade XHLC64534, 1.3D, 6 mm, Yangzhou Xiangheng Polyester Technology Co., Ltd.), 50 parts by mass of nylon octagonal gear profiled fibers (1.0D, 6 mm, Nantong Yongsheng Huvis Fiber New Materials Co., Ltd., grade NHP), and 10 parts by mass of Tencel fibers (beating degree of 35°SR, Lenzing Fibers Shanghai Co., Ltd.). After separately defibrating and dispersing them, mix them. Dilute the pulp with water to a mass percentage concentration of 0.1% to obtain the original paper mixed pulp. After diluting the concentration to 0.03 wt% on a paper machine, dehydrate and dry (at 150 °C) to obtain the original paper with a basis weight of 80 g / m 2 of the original paper.

[0065] Step 2: Weigh 75 parts by mass of 15,000-mesh activated carbon particles, 5 parts by mass of composite photocatalyst (N401, Shanghai Institute of Ceramics, Chinese Academy of Sciences), 5 parts by mass (dry weight) of acrylic polymer emulsion (BASF Anchorit 7245X), 10 parts by mass of amino alcohol (aminotriethanol), and 5 parts by mass of urea phosphate. After separately stirring them, mix them to obtain an aqueous adsorption-enhanced mixed sizing material with a concentration of 15 wt%. Coat the above mixed sizing material onto the original paper obtained in Step 1 by roll coating, with a coating amount of 120 g / m 2 , and then dry (at 120 °C) to obtain the deodorant activated carbon paper with a total basis weight of 200 g / m 2 .

[0066] Example 2

[0067] Step 1: Weigh 60 parts by mass of hollow bicomponent fibers (type FDY, grade XHLC64534, 1.3D, 6 mm, Yangzhou Xiangheng Polyester Technology Co., Ltd.), 30 parts by mass of polyester cross-shaped fibers (POY, 1.5D, 6 mm, Shaoxing Xinen Textile Technology Co., Ltd.), and 10 parts by mass of Tencel fibers (beating degree of 35°SR, Lenzing Fibers Shanghai Co., Ltd.). After separately defibrating and dispersing them, mix them. Dilute the pulp to a mass percentage concentration of 0.1% to obtain the original paper mixed pulp. After diluting the concentration to 0.03 wt% on a paper machine, dehydrate and dry (at 150 °C) to obtain the original paper with a basis weight of 80 g / m 2 of the original paper.

[0068] Step 2: Weigh 75 parts by mass of 15,000-mesh activated carbon particles, 5 parts by mass of composite photocatalyst (N401, Shanghai Institute of Ceramics, Chinese Academy of Sciences), 5 parts by mass (dry weight) of acrylic polymer emulsion (BASF Anchorite 7245X), 10 parts by mass of amino alcohol (aminotriethanol), and 5 parts by mass of urea phosphate, stir them respectively and then mix them to obtain an aqueous adsorption-enhanced mixed sizing material with a concentration of 15 wt%. Coat the above-mentioned mixed sizing material onto the base paper obtained in Step 1 by roll coating, with a coating amount of 120 g / m 2 , and then dry it at 120 °C to obtain a deodorant activated carbon paper with a total basis weight of 200 g / m 2 .

[0069] Example 3

[0070] Step 1: Weigh 20 parts by mass of hollow bicomponent fibers (type FDY, grade XHLC64534, 1.3D, 6 mm, Yizheng Xiangheng Polyester Technology Co., Ltd.), 50 parts by mass of nylon octagonal gear-shaped fibers (1.0D, 6 mm, Nantong Yongsheng Huvis Fiber New Materials Co., Ltd., grade NHP), 20 parts by mass of polyester cross-shaped fibers (POY, 1.5D, 6 mm, Shaoxing Xinen Textile Technology Co., Ltd.), 5 parts by mass of tencel fibers (35° SR beating degree, Lenzing Fibers Shanghai Co., Ltd.), and 5 parts by mass of water-soluble PVA fibers (model 105-2, 3 mm, Kuraray Co., Ltd., Japan), disperse and mix them respectively after defibration, dilute the pulp to a mass percentage concentration of 0.1% to obtain a base paper mixed pulp; dilute the concentration to 0.03 wt% on a paper machine, then dehydrate and dry it at 150 °C to obtain a base paper with a basis weight of 80 g / m 2 .

[0071] Step 2: Weigh 75 parts by mass of 15,000-mesh activated carbon particles, 5 parts by mass of composite photocatalyst (N401, Shanghai Institute of Ceramics, Chinese Academy of Sciences), 5 parts by mass (dry weight) of acrylic polymer emulsion (BASF Anchorite 7245X), 10 parts by mass of amino alcohol (aminotriethanol), and 5 parts by mass of urea phosphate, stir them respectively and then mix them to obtain an aqueous adsorption-enhanced mixed sizing material with a concentration of 15 wt%. Coat the above-mentioned mixed sizing material onto the base paper obtained in Step 1 by roll coating, with a coating amount of 120 g / m 2 , and then dry it at 120 °C to obtain a deodorant activated carbon paper with a total basis weight of 200 g / m 2 .

[0072] Example 4

[0073] Step 1: Weigh 40 parts by mass of hollow bicomponent fibers (type FDY, grade XHLC64534, 1.3D, 6 mm, Yangzhou Xiangheng Polyester Technology Co., Ltd.), 50 parts by mass of nylon octagonal gear profiled fibers (1.0D, 6 mm, Nantong Yongsheng Huvis Fiber New Materials Co., Ltd., grade NHP), and 10 parts by mass of Tencel fibers (beating degree of 35°SR, Lenzing Fibers Shanghai Co., Ltd.). After separately defibrating and dispersing them, mix them together. Dilute the pulp to a mass percentage concentration of 0.1% to obtain the original paper mixed pulp. Dilute the concentration to 0.03 wt% on a paper machine, then dehydrate and dry (at 150 °C) to obtain the original paper with a basis weight of 80 g / m 2 of the original paper.

[0074] Step 2: Weigh 75 parts by mass of 15000-mesh activated carbon particles, 10 parts by mass (dry weight) of acrylic polymer emulsion (BASF Anchorit 7245X), 10 parts by mass of amino alcohol (aminotriethanol), and 5 parts by mass of urea phosphate. After separately stirring them, mix them together to obtain an aqueous adsorption-enhanced mixed sizing material with a concentration of 15 wt%. Coat the above mixed sizing material onto the original paper obtained in Step 1 by roll coating, with a coating amount of 120 g / m 2 , and then dry (at 120 °C) to obtain the deodorant activated carbon paper with a total basis weight of 200 g / m 2 of the deodorant activated carbon paper.

[0075] Example 5

[0076] Step 1: Weigh 40 parts by mass of hollow bicomponent fibers (type FDY, grade XHLC64534, 1.3D, 6 mm, Yangzhou Xiangheng Polyester Technology Co., Ltd.), 50 parts by mass of nylon octagonal gear profiled fibers (1.0D, 6 mm, Nantong Yongsheng Huvis Fiber New Materials Co., Ltd., grade NHP), and 10 parts by mass of Tencel fibers (beating degree of 35°SR, Lenzing Fibers Shanghai Co., Ltd.). After separately defibrating and dispersing them, mix them together. Dilute the pulp to a mass percentage concentration of 0.1% to obtain the original paper mixed pulp. Dilute the concentration to 0.03 wt% on a paper machine, then dehydrate and dry (at 150 °C) to obtain the original paper with a basis weight of 80 g / m 2 of the original paper.

[0077] Step 2: Weigh 80 parts by mass of 15000-mesh activated carbon particles, 5 parts by mass (dry weight) of acrylic polymer emulsion (BASF Anchorit 7245X), 10 parts by mass of amino alcohol (aminotriethanol), and 5 parts by mass of zinc ricinoleate modifier. After separately stirring them, mix them together to obtain an aqueous adsorption-enhanced mixed sizing material with a concentration of 15 wt%. Coat the above mixed sizing material onto the original paper obtained in Step 1 by roll coating, with a coating amount of 120 g / m 2 , and then dry (at 120 °C) to obtain the deodorant activated carbon paper with a total basis weight of 200 g / m 2 of the deodorant activated carbon paper.

[0078] Example 6

[0079] Step 1: Weigh 40 parts by mass of hollow bicomponent fibers (type FDY, grade XHLC64534, 1.3D, 6 mm, Yangzhou Xiangheng Polyester Technology Co., Ltd.), 50 parts by mass of nylon octagonal gear profiled fibers (1.0D, 6 mm, Nantong YongSheng Huvis Fiber New Materials Co., Ltd., grade NHP), and 10 parts by mass of Tencel fibers (beating degree of 35°SR, Lenzing Fibers Shanghai Co., Ltd.), respectively. After defibrating and dispersing them, mix them together, dilute the pulp to a mass percentage concentration of 0.1%, and prepare the original paper mixed pulp; on a paper machine, dilute the concentration to 0.03 wt% and then dehydrate and dry (at 150 °C) to obtain the original paper with a basis weight of 80 g / m 2 of the original paper.

[0080] Step 2: Weigh 50 parts by mass of 15,000-mesh activated carbon particles, 25 parts by mass of composite photocatalyst (N401, Shanghai Institute of Ceramics, Chinese Academy of Sciences), 5 parts by mass (dry weight) of acrylic polymer emulsion (BASF Anchor 7245X), 5 parts by mass of amino alcohol (triethanolamine), 5 parts by mass of urea phosphate, and 5 parts of zinc ricinoleate modifier, stir them respectively and then mix them to prepare an aqueous adsorption-enhanced mixed sizing material with a concentration of 15 wt%. Coat the above mixed sizing material onto the original paper obtained in Step 1 by roll coating, with a coating amount of 120 g / m 2 , and then dry (at 120 °C) to obtain the deodorant activated carbon paper with a total basis weight of 200 g / m 2 of the deodorant activated carbon paper.

[0081] Comparative Example 1

[0082] Purchase the deodorant activated carbon filter paper of a domestic company and directly process it into a 20-mesh honeycomb board with a size of 450×165×13 mm.

[0083] Comparative Example 2

[0084] Purchase the finished honeycomb of imported Japanese deodorant activated carbon paper with a pore size of 20 mesh and cut it into a size of 450×165×13 mm.

[0085] Example 7

[0086] Weigh 40 parts by mass of hollow bicomponent fibers (type FDY, grade XHLC64534, 1.3D, 6mm, Yizheng Xiangheng Polyester Technology Co., Ltd.), 50 parts by mass of nylon octagonal gear profiled fibers (1.0D, 6mm, Nantong Yongsheng Huvis Fiber New Materials Co., Ltd., grade NHP), 10 parts by mass of Tencel fibers (beating degree of 35°SR, Lenzing Fibers Shanghai Co., Ltd.), 75 parts by mass of 15,000-mesh activated carbon particles, 5 parts by mass of composite photocatalyst (N401, Shanghai Institute of Ceramics, Chinese Academy of Sciences), 5 parts by mass (dry weight) of acrylic polymer emulsion (BASF Anchorite 7245X), 10 parts by mass of amino alcohol (aminotriethanol) and 5 parts by mass of urea phosphate respectively, carry out defibration and dispersion, then mix them. Transfer the mixed modified sizing material with a concentration of 5wt% into the paper film forming box, and directly carry out vacuum suction dehydration using a forming wire with a size of 450×165×13mm and a mesh size of 20 meshes. After drying (150°C), directly form it integrally to obtain a deodorant activated carbon honeycomb filter plate.

[0087] Measure the basic properties of the deodorant activated carbon paper materials in Examples 1 - 6 and the deodorization efficiency performance of the sample honeycomb filter plates in Example 7 and Comparative Examples 1 - 2. Measurement indicators and methods: The bursting strength is measured according to GB / T 454 - 2002; the longitudinal stiffness is measured according to GB / T 2679.3 - 1996; the air permeability is measured according to GB / T 5453 - 1997; the test method for deodorization efficiency: Process the activated carbon deodorant paper in Examples 1 - 6 into honeycomb plates with a size of 450×165×13mm and a pore size of 20 meshes, and place them in a test chamber with a volume of 4m 3 . Inject two gases, formaldehyde and ammonia, and circulate them for 30 minutes, and use FT-IR to detect the gas concentration. The test results are shown in Table 1.

[0088] Table 1 Basic properties and deodorization efficiency of the deodorant activated carbon paper materials in Examples and Comparative Examples

[0089]

[0090] As can be seen from Table 1, by adjusting the ratio of different profiled fibers to hollow bicomponent fibers, activated carbon papers with different bursting strengths and air permeabilities can be obtained; from Examples 1, 1 and Comparative Examples 1 and 2, it can be seen that the adsorption performance of the activated carbon paper of the present invention after being processed into a honeycomb is better than that of imported samples. From the comparison between Example 1 and Example 7, the honeycomb performance made by the one-step forming process is equivalent to the adsorption performance of the activated carbon paper processed into a honeycomb by secondary processing.

[0091] The above are only the preferred embodiments of the present invention and do not impose any formal restrictions on the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An adsorption material, characterized in that, The preparation raw materials include the following mass percentages: 8 - 40% of hollow bicomponent fibers, 10 - 35% of profiled fibers, 4 - 20% of reinforcing fibers, 37.5 - 70% of adsorption medium, 5 - 20% of modifier, and 0 - 6% of reinforcing agent; the hollow bicomponent fibers are hollow tubular, one semi - circle of the hollow tube is made of high - melting - point fiber, and the other semi - circle is made of low - melting - point fiber; the adsorption medium includes ultrafine activated carbon particles, and the mesh number of the ultrafine activated carbon particles is 15000 - 20000 meshes.

2. The adsorbent material according to claim 1, wherein The high - melting - point fiber is made of PET with a melting point of 240 - 260 °C; the low - melting - point fiber is made of COPET with a melting point of 150 - 180 °C.

3. The adsorbent material according to claim 1 or 2, characterized in that The fiber fineness of the hollow bicomponent fiber is 0.2 - 2.0 D, and the length is 3 - 9 mm.

4. The adsorbent material according to claim 1, characterized in that, The profiled fiber is made of polyester, terylene or nylon; the cross - section of the profiled fiber is cruciform, octagonal, trilobal, quadrilobal or octagonal gear - shaped; the fiber fineness of the profiled fiber is 0.2 - 2.0 D, and the length is 3 - 9 mm.

5. The adsorbent material according to claim 1, wherein The reinforcing fiber includes one or more of PVA fiber, SWP pulp, wood pulp fiber, tencel fiber and aramid fibrillated fiber; the fiber diameter of the reinforcing fiber is 3 - 20 μm, and the length is 3 - 9 mm.

6. The adsorption material according to claim 1, wherein The adsorption medium further includes activated carbon fibers and / or photocatalyst; the activated carbon fibers have a diameter of 10 to 30 μm, a length of 3 to 12 mm, and a specific surface area ≥ 1500 m 2 / g; the photocatalyst has a particle size of 5 to 50 nm.

7. The adsorbent material according to claim 1, characterized in that, The modifier includes one or more of amino alcohol, potassium permanganate, zinc ricinoleate, urea phosphate and silane coupling agent; the reinforcing agent includes one or more of water - soluble polyester, styrene / acrylic acid copolymer, acrylic polymer resin, vinyl acetate, epoxy resin and phenolic resin.

8. The preparation method of the adsorption material according to any one of claims 1 to 7, characterized in that, It includes the following steps: Mix the hollow bicomponent fibers, profiled fibers, reinforcing fibers and water to obtain a mixed suspension slurry. After wet - forming the mixed suspension slurry, conduct the first drying to obtain a fiber base paper; the temperature of the first drying causes the low - melting - point fibers in the hollow bicomponent fibers to melt. Mix the adsorption medium, modifier, reinforcing agent and water to obtain a mixed dispersion liquid. After impregnating the fiber base paper with the mixed dispersion liquid, conduct the second drying to obtain the adsorption material.

9. The preparation method of the adsorption material according to any one of claims 1 to 7, characterized in that, It includes the following steps: Mix the hollow bicomponent fibers, profiled fibers, reinforcing fibers, adsorption medium, modifier, reinforcing agent and water to obtain a mixed suspension slurry. Suction the mixed suspension slurry onto a forming wire mold to obtain a wet paper embryo. Dry the wet paper embryo to obtain the adsorption material; the drying temperature causes the low - melting - point fibers in the hollow bicomponent fibers to melt.

10. Application of the adsorption material according to any one of claims 1 - 7 or the adsorption material prepared by the preparation method according to claim 8 or 9 in air purification.

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