CN115339183A - Wood composite acoustic board with aldehyde-purifying and flame-retardant functions and preparation method thereof - Google Patents

Wood composite acoustic board with aldehyde-purifying and flame-retardant functions and preparation method thereof Download PDF

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Publication number
CN115339183A
CN115339183A CN202210967044.6A CN202210967044A CN115339183A CN 115339183 A CN115339183 A CN 115339183A CN 202210967044 A CN202210967044 A CN 202210967044A CN 115339183 A CN115339183 A CN 115339183A
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layer
wood
sound absorption
composite
aldehyde
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梁静静
陈卫
周明吉
魏任重
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Treezo New Meterial Science and Technology Group Co Ltd
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Treezo New Meterial Science and Technology Group Co Ltd
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Priority to CN202210967044.6A priority Critical patent/CN115339183A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/14—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/047—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/49—Phosphorus-containing compounds
    • C08K5/51—Phosphorus bound to oxygen
    • C08K5/52—Phosphorus bound to oxygen only
    • C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/22—Expanded, porous or hollow particles
    • C08K7/24—Expanded, porous or hollow particles inorganic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/12—Adsorbed ingredients, e.g. ingredients on carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0278—Polyurethane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2101/00—Manufacture of cellular products
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2262—Oxides; Hydroxides of metals of manganese
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives

Abstract

The invention discloses a wood composite acoustic board with aldehyde purification and flame retardant functions, which sequentially comprises a wood base material layer, a porous acoustic layer and a wood veneer layer from bottom to top; the porous sound absorption layer is formed on the surface of the wood base material layer in a high-pressure spraying mode, the wood veneer layer is bonded on the surface of the porous sound absorption layer through an aldehyde-free adhesive, and the wood base material layer is a leftover material paving layer with the thickness of 10-20 mm; the thickness of the porous sound absorption layer is 10mm, and the porous sound absorption layer is prepared from foaming polyurethane. The wood composite sound-absorbing board prepared by the invention consists of a wood base material layer, a porous sound-absorbing layer and a wood veneer layer; the porous sound absorption layer is formed by using polyether polyol and isocyanate as raw materials, doping phosphorus-nitrogen flame retardants and composite formaldehyde degradation particles through high-pressure spraying, the doped composite formaldehyde degradation particles can not only play a role in sound absorption with foamed polyurethane under the combined action, but also can efficiently absorb formaldehyde, and the Mn/C catalyst can play a role in formaldehyde degradation, so that a lasting formaldehyde purification effect is achieved.

Description

Wood composite acoustic board with aldehyde-purifying and flame-retardant functions and preparation method thereof
Technical Field
The invention belongs to the technical field of building boards, and particularly relates to a wood composite acoustic board with aldehyde purification and flame retardant functions and a preparation method thereof.
Background
The sound-absorbing and sound-absorbing materials are often used for reducing indoor noise, and most of the existing sound-absorbing materials are mineral wool sound-absorbing boards, plant fiber sound-absorbing boards, foam concrete partition walls, air-added bricks and calcium silicate boards. However, sound-absorbing materials also have various problems: the foam concrete partition wall and the aerated brick have uneven quality, and the sound insulation effect is not obvious; the mineral wool acoustic board takes rock wool, mineral wool, glass wool and the like as raw materials, influences can be caused to a human body in the preparation process of the raw materials, and the mineral wool acoustic board has poor fire resistance, shock resistance and waterproof performance, is easy to warp and deform in the use process and influences the service life; although the plant fiber sound-absorbing board has good sound-absorbing performance in the medium and high frequency ranges, the performances of fire prevention, corrosion prevention, moisture prevention and the like are poor; although the calcium silicate board has certain flame retardant and impact resistance, the calcium silicate board also has the defects of high density, high price, inconvenient construction and the like; in addition, some sound-absorbing materials use aldehyde-containing adhesives, which can also aggravate indoor formaldehyde pollution.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a wood composite sound-absorbing board with aldehyde-purifying and flame-retardant functions and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical means:
a wood composite acoustic board with aldehyde-purifying and flame-retardant functions sequentially comprises a wood base material layer, a porous acoustic layer and a wood veneer layer from bottom to top; the porous sound absorption layer is formed on the surface of the wood base material layer in a high-pressure spraying mode, and the wood veneer layer is bonded on the porous sound absorption layer through an aldehyde-free adhesive;
wherein the wood base material layer is a leftover material paving layer with the thickness of 10-20 mm; the thickness of the porous sound absorption layer is 5-15mm, and the porous sound absorption layer is prepared from foamed polyurethane.
Preferably, the aldehyde-free adhesive comprises 32-40 parts by weight of isocyanate, 1-2 parts by weight of water foaming agent, 0.5-0.8 part by weight of amine catalyst and 0.5-0.7 part by weight of phosphorus flame retardant;
preferably, the preparation method of the wood substrate layer comprises the following steps: adding 4-5kg of the processing leftover materials into a mixing kettle, sequentially adding 500-600g of foaming materials, 350-450g of formaldehyde-free adhesive, 120-180g of emulsified paraffin and 500-700g of phosphorus flame retardant, stirring for 30 minutes, paving in a mold, putting into a hot press, placing a steel plate above the hot press, heating to 80 ℃, and keeping for 3 minutes; the temperature is continuously raised to 200 ℃, the pressure is 6MPa, and the time is 2 minutes. Cooling to obtain a wood base material layer with the thickness of 10-20 mm.
A preparation method of a wood composite acoustic board with aldehyde-purifying and flame-retardant functions comprises the following steps:
s1, sequentially adding polyether polyol, a water-containing foaming agent, a catalyst, a foam stabilizer, a nitrogen-phosphorus flame retardant and composite formaldehyde degradation particles into a mixing kettle, adding isocyanate, stirring and foaming to obtain a foamed polyurethane material, wherein the particle size of the composite formaldehyde degradation particles is 5-10nm;
s2, adding the polyurethane foam material obtained in the step S1 into a high-pressure spraying machine, and spraying the polyurethane foam material on the surface of a wood base material layer under high pressure to form a porous sound absorption layer with the thickness of 10 mm;
and S3, coating an aldehyde-free adhesive on the upper surface of the porous sound absorption layer, and then attaching a wood veneer layer to the upper surface of the porous sound absorption layer to obtain the wood composite sound absorption plate with aldehyde purification and flame retardant functions.
Preferably, in step S1, the water foaming agent is selected from one of water, ethanol, ethylene glycol, acetone, isopropanol and propanol;
preferably, in step S1, the catalyst is an amine catalyst, including triethylamine and triethanolamine;
preferably, in step S1, the phosphorus flame retardant is a phosphate flame retardant;
preferably, in step S1, the composite formaldehyde degradation particles are made of nano-porous activated carbon loaded with MnO 2 The prepared Mn/C catalyst; the method comprises the following specific steps: adding Mn (NO) 3 ) 2 Dissolving in water, adding Mn (NO) 3 ) 2 Uniformly dispersing nano porous activated carbon with the mass 5 times that of the activated carbon by ultrasonic to obtain a mixture, transferring the mixture into a muffle furnace, and calcining for 45min at 300 ℃ under the flow of nitrogen to obtain the MnO-loaded activated carbon 2 The porous active carbon Mn/C catalyst is the compound formaldehyde degradation particles.
Preferably, in step S1, the foam stabilizer is methyl silicone oil;
preferably, in step S1, the polyether polyol, the isocyanate, the aqueous foaming agent, the catalyst, the foam stabilizer, the phosphorus flame retardant and the composite formaldehyde degradation particles are calculated as follows in parts by weight: 50-60 parts of polyether polyol, 32-40 parts of isocyanate, 1-2 parts of water-containing foaming agent, 0.5-0.8 part of catalyst, 1-2 parts of foam stabilizer, 0.5-0.7 part of phosphorus flame retardant and 0.8-1.2 parts of composite formaldehyde degradation particles.
The invention has the advantages of
Compared with the prior art, the invention has the following beneficial effects:
the wood composite sound-absorbing board prepared by the invention consists of a wood base material layer, a porous sound-absorbing layer and a wood veneer layer; the porous sound absorption layer is formed by using polyether polyol and isocyanate as raw materials, doping phosphorus-nitrogen flame retardants and composite formaldehyde degradation particles through high-pressure spraying, the doped composite formaldehyde degradation particles can not only play a role in sound absorption with foamed polyurethane under the combined action, but also can efficiently absorb formaldehyde, and the Mn/C catalyst can play a role in formaldehyde degradation, so that a lasting formaldehyde purification effect is achieved.
Detailed Description
Unless otherwise indicated, implicit from the context, or customary in the art, all parts and percentages herein are based on weight and the testing and characterization methods used are in step with the filing date of the present application. Where applicable, the contents of any patent, patent application, or publication referred to in this application are incorporated herein by reference in their entirety and their equivalent family patents are also incorporated by reference, especially as they disclose definitions relating to synthetic techniques, products and process designs, polymers, comonomers, initiators or catalysts, and the like, in the art. To the extent that a definition of a particular term disclosed in the prior art is inconsistent with any definitions provided herein, the definition of the term provided herein controls.
The numerical ranges in this application are approximations that can include values outside of the ranges unless otherwise specified. A numerical range includes all numbers from a lower value to an upper value, in increments of 1 unit, provided that there is a separation of at least 2 units between any lower value and any higher value. For example, if a compositional, physical, or other property (e.g., molecular weight, melt index, etc.) is recited as 100 to 1000, it is intended that all individual values, e.g., 100, 101, 102, etc., and all subranges, e.g., 100 to 166, 155 to 170, 198 to 200, etc., are explicitly recited. For ranges containing a numerical value less than 1 or containing a fraction greater than 1 (e.g., 1.1,1.5, etc.), then 1 unit is considered to be 0.0001,0.001,0.01, or 0.1, as appropriate. For ranges containing single digit numbers less than 10 (e.g., 1 to 5), 1 unit is typically considered 0.1. These are merely specific examples of what is intended to be expressed and all possible combinations of numerical values between the lowest value and the highest value enumerated are to be considered to be expressly stated in this application.
When used with respect to chemical compounds, the singular includes all isomeric forms and vice versa (e.g., "hexane" includes all isomers of hexane, individually or collectively) unless expressly specified otherwise. In addition, unless explicitly stated otherwise, the use of the terms "a", "an" or "the" are intended to include the plural forms thereof.
The terms "comprising," "including," "having," and derivatives thereof do not exclude the presence of any other component, step or procedure, and are not relevant to whether such other component, step or procedure is disclosed herein. To the exclusion of any doubt, all compositions herein using the terms "comprising", "including", or "having" may include any additional additive, adjuvant, or compound, unless explicitly stated otherwise. Rather, the term "consisting essentially of 8230 \8230; \8230composition" excludes any other components, steps or processes from the scope of any of the terms hereinafter recited, insofar as they are necessary for performance. The term "consisting of 8230%" \8230comprises "does not include any components, steps or processes not specifically described or listed. Unless explicitly stated otherwise, the term "or" refers to the listed individual members or any combination thereof.
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clear, the present invention is further described in detail below with reference to the embodiments.
Examples
The following examples are used herein to demonstrate preferred embodiments of the invention. It will be appreciated by those of skill in the art that the techniques disclosed in the examples which follow represent techniques discovered by the inventor to function in the invention, and thus can be considered to constitute preferred modes for its practice. Those of skill in the art should, in light of the present disclosure, appreciate that many changes can be made in the specific embodiments which are disclosed and still obtain a like or similar result without departing from the spirit or scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs and the disclosures and materials cited therein are hereby incorporated by reference.
Those skilled in the art will recognize, or be able to ascertain using no more than routine experimentation, many equivalents to the specific embodiments of the invention described herein. Such equivalents are intended to be encompassed by the following claims.
Experiment one
Preparing a wood base material layer:
adding 4-5kg of the residual leftover materials into a mixing kettle, sequentially adding 500-600g of foaming material, 350-450g of aldehyde-free adhesive, 120-180g of emulsified paraffin and 500-700g of phosphorus flame retardant, stirring for 30 minutes, paving in a mould, putting into a hot press, placing a steel plate above the hot press, heating to 80 ℃, and keeping for 3 minutes; the temperature is continuously increased to 200 ℃, the pressure is 6MPa, and the time is 2 minutes. Cooling to obtain a wood base material layer with the thickness of 10-20 mm.
Example 1
The embodiment provides a preparation method of composite formaldehyde degradation particles, which comprises the following steps:
50g of Mn (NO) 3 ) 2 Dissolving in 500mL of water, adding 250g of nano-porous activated carbon, uniformly dispersing by ultrasonic to obtain a mixture, transferring the mixture into a muffle furnace, calcining for 45min at 300 ℃ under nitrogen flow to obtain the MnO-loaded material 2 The porous active carbon Mn/C catalyst is composite formaldehyde degrading granule with the grain size of 5-10nm.
Example 2
The embodiment provides a preparation method of a wood composite acoustic board with aldehyde-purifying and flame-retardant functions, which comprises the following steps:
s1, sequentially adding 55kg of polyether polyol, 600g of phosphorus flame retardant, 1.5kg of water, 600g of amine catalyst, 36kg of isocyanate, 1kg of foam stabilizer and 1kg of composite formaldehyde degradation particles Mn/C into a mixing kettle, and stirring and mixing for 2-3 minutes to obtain a polyurethane foam material;
s2, adding the polyurethane foam material obtained in the step S1 into a high-pressure spraying machine, and performing high-pressure spraying on the surface of the wood base material layer to form a porous sound absorption layer with the thickness of 10mm on the surface of the wood base material layer;
and S3, coating an aldehyde-free adhesive on the upper surface of the porous sound absorption layer, then attaching the wood veneer layer to the upper surface of the porous sound absorption layer, carrying out hot pressing at 180 ℃ for 5 minutes, and cooling to obtain the wood composite sound absorption plate with aldehyde purification and flame retardant functions.
Example 3
Example 3 is different from example 2 in that the amount of the phosphorus-based flame retardant used in example 3 is 300g.
Example 4
Example 4 is different from example 2 in that 500g of the composite formaldehyde-degrading particles are used in example 4.
Comparative example 1
Comparative example 1 is different from example 2 in that comparative example 1 replaces composite formaldehyde-degrading particles with zinc/antimony bi-component supported nano silicon carbide materials with high specific surface area disclosed in patent CN 108246326B.
Comparative example 2
Comparative example 2 is different from example 2 in that comparative example 2 does not contain the composite formaldehyde degradation particles.
The sound-insulating properties, flame-retardant properties and formaldehyde emission were measured according to the relevant standards for examples 2 to 4 and comparative examples 1 to 2, and the results are shown in Table 1
TABLE 1 test results Table
Internal bond Strength (MPa) Sound insulation rating Flame retardant rating Formaldehyde emission (mg/m 3)
Example 2 0.48 49 Class B1 0.016
Example 3 0.43 53 Class B2 0.013
Example 4 0.47 48 Class B1 0.028
Comparative example 1 0.45 48 Class B1 0.023
Comparative example 2 0.50 50 Class B1 0.049
According to the data, the wood composite sound-absorbing board prepared by the invention consists of a wood base material layer, a porous sound-absorbing layer and a wood veneer layer; the porous sound absorption layer is formed by using polyether polyol and isocyanate as raw materials, doping phosphorus-nitrogen flame retardants and composite formaldehyde degradation particles through high-pressure spraying, the doped composite formaldehyde degradation particles can not only play a role in sound absorption with foamed polyurethane under the combined action, but also can efficiently absorb formaldehyde, and the Mn/C catalyst can play a role in formaldehyde degradation, so that a lasting formaldehyde purification effect is achieved.
All documents referred to herein are incorporated by reference into this application as if each were individually incorporated by reference. Furthermore, it should be understood that various changes and modifications of the present invention can be made by those skilled in the art after reading the above teachings of the present invention, and these equivalents also fall within the scope of the present invention as defined by the appended claims.

Claims (8)

1. A wood composite acoustic board with aldehyde-purifying and flame-retardant functions is characterized in that a wood base material layer, a porous acoustic layer and a wood veneer layer are sequentially arranged from bottom to top; the porous sound absorption layer is formed on the surface of the wood base material layer in a high-pressure spraying mode, and the wood veneer layer is bonded on the surface of the porous sound absorption layer through a formaldehyde-free adhesive;
wherein the wood base material layer is a leftover material paving layer with the thickness of 10-20 mm; the porous sound absorption layer is 5-15mm thick and is prepared from foamed polyurethane.
2. The wood composite sound absorbing sheet according to claim 1, wherein the aldehyde-free adhesive comprises an isocyanate, a water blowing agent, an amine catalyst and a phosphorus-based flame retardant.
3. The method for preparing the wood composite sound-absorbing board with the aldehyde-purifying and flame-retardant functions as claimed in claim 1, is characterized by comprising the following steps:
s1, sequentially adding polyether polyol, a water foaming agent, a catalyst, a foam stabilizer, a phosphorus flame retardant and composite formaldehyde degradation particles into a mixing kettle, adding isocyanate, stirring and foaming to obtain a foamed polyurethane material, wherein the particle size of the composite formaldehyde degradation particles is 5-10nm;
s2, adding the polyurethane foam material obtained in the step S1 into a high-pressure spraying machine, and spraying the polyurethane foam material on the surface of a wood base material layer under high pressure to form a porous sound absorption layer with the thickness of 10 mm;
and S3, coating an aldehyde-free adhesive on the upper surface of the porous sound absorption layer, and then attaching a wood veneer layer to the upper surface of the porous sound absorption layer to obtain the wood composite sound absorption plate with aldehyde purification and flame retardant functions.
4. The production method according to claim 3, wherein in step S1, the water foaming agent is one selected from the group consisting of water, ethanol, ethylene glycol, acetone, isopropyl alcohol and propanol.
5. The method according to claim 3, wherein in step S1, the catalyst is an amine catalyst comprising triethanolamine and triethylamine.
6. The method according to claim 3, wherein in step S1, the composite formaldehyde-degrading particles are made of MnO supported on porous activated carbon 2 The Mn/C catalyst is prepared.
7. The preparation method according to claim 3, wherein in the step S1, the foam stabilizer is methyl silicone oil.
8. The preparation method according to claim 3, wherein in the step S1, the polyether polyol, the isocyanate, the water-containing foaming agent, the catalyst, the foam stabilizer, the phosphorus flame retardant and the composite formaldehyde degradation particles are calculated according to the following parts by weight: 50-60 parts of polyether polyol, 32-40 parts of isocyanate, 1-2 parts of a water-containing foaming agent, 0.5-0.8 part of a catalyst, 1-2 parts of a foam stabilizer, 0.5-0.7 part of a phosphorus flame retardant and 0.8-1.2 parts of composite formaldehyde degradation particles.
CN202210967044.6A 2022-08-11 2022-08-11 Wood composite acoustic board with aldehyde-purifying and flame-retardant functions and preparation method thereof Pending CN115339183A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CN110256777A (en) * 2019-06-06 2019-09-20 湖南同进装饰材料有限公司 A kind of fire-retardant composite decorating board of bamboo and woods fiber and preparation method thereof
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102198405A (en) * 2011-04-01 2011-09-28 天津工业大学 Composite catalyst for purifying indoor formaldehyde and preparation method of composite catalyst
JP2020180169A (en) * 2019-04-23 2020-11-05 東ソー株式会社 Polyurethane foam-forming composition
CN110256777A (en) * 2019-06-06 2019-09-20 湖南同进装饰材料有限公司 A kind of fire-retardant composite decorating board of bamboo and woods fiber and preparation method thereof

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