Poplar fiber board deodorant as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of deodorants, and relates to a poplar fiber board deodorant, which is prepared from the following ingredients in parts by mass: 22 to 28 parts of multi-ion water, 22 to 28 parts of amino formaldehyde catching agents, 4 to 6 parts of nanometer TiO2, 8 to 12 parts of beta-cyclodextrin, 12 to 18 parts of porous adsorbents, 4 to 6 parts of surfactants and 12 to 18 parts of plant essential oil emulsion. The invention further discloses a preparation method and application of the poplar fiber board deodorant. The deodorant disclosed by the invention has a multi-mechanism synergistic deodorization effect of chemical decomposition, physical adsorption and biological bacteriostasis, can effectively remove peculiar smell of wood and peculiar smell problems caused by an adhesive, a waterproof agent and the like added in a plate processing process, reduces smell release of a poplar fiber plate, and improves indoor air quality.

Description

Technical Field

[0001] The invention belongs to the technical field of deodorants, relates to a fiberboard deodorant, and particularly relates to a poplar fiberboard deodorant and a preparation method and application thereof. Background Art

[0002] Artificial board materials are a core material in the construction and furniture industries, and the market size continues to grow. Fiberboard accounts for over 25% of the market, holding a significant position within the artificial board market. Fiberboard is made from wood or other plant fibers, which are crushed, separated, dried, applied with adhesive, and then hot-pressed into a sheet material. Due to its ease of processing, cost advantages, and environmental potential, fiberboard is widely used in a variety of fields, including home furnishings, construction, and automotive. In recent years, consumer demand for environmentally friendly building and home furnishing materials has steadily increased, and the irritating odor release from traditional fiberboard has garnered widespread attention from both the artificial board industry and consumers. Deodorants can effectively address this irritating odor issue through a variety of chemical, physical, and biological methods, playing a role in both production (B) and consumer (C) sectors. In the future, as environmental regulations tighten and consumer health awareness increases, efficient, long-lasting, and pollution-free environmentally friendly deodorants will become a mainstream market trend.

[0003] The odor of poplar fiberboard mainly comes from: (1) natural volatile organic compounds (VOCs) of poplar fiber, including volatile components such as terpenes (such as α-pinene, β-pinene) and aldehydes (such as hexanal), which have a light resin or grassy smell and are relatively mild. Only a small number of sensitive people may find it pungent; (2) additives in the production process, such as adhesives, preservatives, mildew inhibitors, flame retardants and waterproofing agents, such as formaldehyde released by adhesives. Some fiberboards add preservatives such as pentachlorophenol (PCP) and borates, which may emit a slight medicinal smell; ( 3) Odor sources in the production process: During the hot pressing process, wood hemicellulose degrades to produce furfural, acetic acid, etc., which produce a caramel or sour smell; when the adhesive is not completely cured, it may release ammonia (NH3) or hydrogen sulfide (H2S); residual surface coatings of post-treatment agents (such as UV paint) and veneer glue may contain benzene series and ester solvents, which release strong odors in the short term; (4) Odors during storage and transportation: Accumulation in a closed environment When the boards are closed in the warehouse or packaging for a long time, the concentration of volatile organic compounds (VOCs) increases; a high humidity environment may cause the boards to become damp and moldy, producing a musty odor.

[0004] The terpene compounds naturally released in poplar fiberboard are harmless to human health. Therefore, when developing poplar fiberboard deodorizers, the sour and rotten smells produced by poplar wood during storage and production and processing, as well as the irritating odors of aldehydes, ketones, acids and other substances are mainly eliminated. Summary of the Invention

[0005] In view of the problems existing in the prior art, the first object of the present invention is to disclose a poplar fiberboard deodorizer.

[0006] Technical Solution

[0007] A poplar fiberboard deodorizer comprises the following components in parts by weight: 22-28 parts of polyion water, 22-28 parts of amino formaldehyde scavenger, 4-6 parts of nano-TiO2, 8-12 parts of beta-cyclodextrin, 12-18 parts of porous adsorbent, 4-6 parts of surfactant, and 12-18 parts of plant essential oil emulsion.

[0008] Preferably, the poplar fiberboard deodorizer comprises the following components in parts by mass: 25 parts of polyion water, 25 parts of amino formaldehyde scavenger, 5 parts of nano-TiO2, 10 parts of β-cyclodextrin, 15 parts of porous adsorbent, 5 parts of surfactant, and 15 parts of plant essential oil emulsion.

[0009] According to a preferred embodiment of the present invention, the concentrations of various substances in the multi-ion water are as follows: potassium ions 16.05-51.48 mmol / L, calcium ions 2.2-6.5 mmol / L, zinc ions 22.5-42.18 mmol / L, sodium ions 153.8-280.6 mmol / L, and glucose 60-280 mmol / L.

[0010] In a preferred embodiment of the present invention, the amino formaldehyde scavenger comprises one or more of carboxymethyl chitosan and polyethyleneimine, preferably carboxymethyl chitosan.

[0011] In a preferred embodiment of the present invention, the porous adsorbent is one or more of diatomaceous earth, activated carbon, and bentonite, preferably diatomaceous earth.

[0012] In a preferred embodiment of the present invention, the surfactant is alkyl polyglycoside (APG).

[0013] In a preferred disclosed embodiment of the present invention, the plant essential oil includes one or more of eucalyptus oil (1,8-cineole), tea tree oil (terpinen-4-ol), and limonene, preferably eucalyptus oil.

[0014] The second object of the present invention is to disclose a method for preparing the above-mentioned poplar fiberboard deodorant.

[0015] A method for preparing a poplar fiberboard deodorant comprises the following steps:

[0016] A. Dissolve potassium chloride, calcium oxide, and zinc chloride in deionized water, and add sodium bicarbonate and glucose to the solution to obtain polyionized water;

[0017] B. mixing the plant essential oil with a small amount of ethanol to obtain solution A, slowly adding solution A to polyion water, homogenizing and emulsifying, to obtain plant essential oil emulsion B;

[0018] C. dissolving the amino formaldehyde scavenger in deionized water and stirring until transparent to obtain solution C;

[0019] D. mixing the porous adsorbent and the surfactant APG to form a stable suspension D;

[0020] E. Add nano-TiO2 and β-cyclodextrin into deionized water to obtain dispersion E, and perform ultrasonic treatment to avoid agglomeration;

[0021] F. The plant essential oil emulsion B, solution C, suspension D, and dispersion E are mixed according to the material ratio, and the pH of the mixture is adjusted to 7-8 with sodium hydroxide solution to obtain a poplar fiberboard deodorizer.

[0022] According to a preferred embodiment of the present invention, in step F, the concentration of the sodium hydroxide solution is 0.1 mol / L.

[0023] The deodorant prepared by the invention has a viscosity of 200-300 mPa·s and is convenient for spraying.

[0024] The third object of the present invention is to disclose the application of the poplar fiberboard deodorant, that is, spraying the deodorant on the surface of the poplar fiberboard in an amount of 10 to 200 g / m 2 .

[0025] Spraying experiments showed that the deodorant had good film-forming properties and could effectively reduce the odor release from poplar fiberboard. The removal effect on heptanal and octanal was most obvious, with maximum removal rates of 47.7% and 59.75% respectively.

[0026] The poplar fiberboard deodorizer disclosed in the present invention is rich in reducing ammonia, which can react with free formaldehyde to form stable compounds. The multi-ion component has a strong negative potential and extremely low surface tension, allowing the deodorizer with strong reducing ability to quickly penetrate into the wood and effectively decompose volatile organic compounds, resins, aromatic oils, and chemicals introduced during post-processing that cause wood odor. Nano-TiO2 can continuously decompose formaldehyde under natural light and effectively remove poplar terpenoid odors. β-cyclodextrin includes wood VOC molecules (such as α-pinene and hexanal), reducing the volatilization rate of poplar's natural volatiles. Diatomaceous earth / activated carbon composite powder has a physical adsorption effect on small molecular organic compounds, preventing mold and moisture, and reducing the overall odor of poplar fiberboard. Plant essential oil emulsion can mask odors, effectively reduce moldy odors, and inhibit bacterial growth. The surfactant APG not only improves the dispersion of the ingredients, but also facilitates the penetration of the deodorizer into the wood, allowing the deodorizer to form a uniform film. In addition, after the deodorizer acts on the wood, it fully penetrates into the pores of the wood fibers. After drying, the mineral ions form crystals, blocking all the pores and ion channels of the wood fibers, effectively inhibiting the subsequent release of odorous substances.

[0027] Beneficial effects

[0028] The deodorizer disclosed in the present invention can effectively remove the odor of wood itself and the odor caused by adhesives and waterproofing agents added during the board processing process, reducing the odor release of poplar fiberboard and improving indoor air quality. The advantages of the deodorizer are: ① Multi-mechanism synergy: The deodorizer prepared by the present invention has the triple effects of chemical decomposition (amino group and photocatalysis), physical adsorption (cyclodextrin and diatomaceous earth), and biological inhibition (essential oil); ② High safety: No strong acid / strong base, the surfactant APG is biodegradable and meets EU ECHA standards; ③ Long-term effect: The inclusion effect of β-cyclodextrin can delay the release of VOCs, and nano-TiO2 can continuously decompose formaldehyde under natural light. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 . Schematic diagram of the preparation process of poplar fiberboard deodorant;

[0030] Figure 2 Changes in the activity values ​​of several odors before and after spraying the deodorant;

[0031] Figure 3 Scanning electron microscope images of a poplar fiberboard before and after spraying a deodorant according to an embodiment of the present invention, wherein a shows the surface morphology of the poplar fiberboard before spraying the deodorant, and b shows the surface morphology of the poplar fiberboard after spraying the deodorant;

[0032] Figure 4 .Infrared spectra of poplar fiberboard before and after spraying the deodorant in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the embodiments of the specification.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0036] Example 1

[0037] A poplar fiberboard deodorizer is prepared, comprising the following components: 25 parts polyionized water; 25 parts carboxymethyl chitosan; 5 parts nano-TiO2; 10 parts β-cyclodextrin; 15 parts diatomaceous earth; 5 parts APG (alkyl glycoside) surfactant; and 15 parts eucalyptus oil. The concentrations of the various ions in the polyionized water are: 26.8 mmol / L potassium ion, 175 mmol / L sodium ion, 2.75 mmol / L calcium ion, 25.43 mmol / L zinc ion, and 170 mmol / L glucose.

[0038] Example 2

[0039] A poplar fiberboard deodorizer is prepared, comprising the following components: 25 parts polyionized water; 25 parts carboxymethyl chitosan; 5 parts nano-TiO2; 10 parts β-cyclodextrin; 15 parts diatomaceous earth; 5 parts APG (alkyl glycoside) surfactant; and 15 parts eucalyptus oil. The concentrations of the various ions in the polyionized water are: potassium ion 40.2 mmol / L, sodium ion 217.5 mmol / L, calcium ion concentration 3.2 mmol / L, zinc ion concentration 29.16 mmol / L, and glucose 240.8 mmol / L.

[0040] Example 3

[0041] A poplar fiberboard deodorizer is prepared, comprising the following components: 25 parts polyionized water; 15 parts carboxymethyl chitosan; 10 parts polyethyleneimine; 5 parts nano-TiO2; 10 parts β-cyclodextrin; 10 parts diatomaceous earth; 5 parts activated carbon; 5 parts APG (alkyl glycoside) surfactant; and 15 parts tea tree oil. The concentrations of the various ions in the polyionized water are: 35.6 mmol / L potassium, 180.7 mmol / L sodium, 4.28 mmol / L calcium, 32.15 mmol / L zinc, and 190.6 mmol / L glucose.

[0042] Example 4

[0043] A poplar fiberboard deodorizer is prepared, comprising the following components: 25 parts polyionized water; 15 parts carboxymethyl chitosan; 10 parts triethanolamine; 5 parts nano-TiO2; 10 parts β-cyclodextrin; 10 parts diatomaceous earth; 5 parts bentonite; 5 parts APG (alkyl glycoside) surfactant; 10 parts tea tree oil; and 5 parts limonene. The concentrations of the various ions in the polyionized water are: 38.9 mmol / L potassium ion, 231.2 mmol / L sodium ion, 3.6 mmol / L calcium ion, 35.76 mmol / L zinc ion, and 220.4 mmol / L glucose.

[0044] Example 5

[0045] Deodorization effect evaluation:

[0046] (1) Deodorization effect:

[0047] Gas chromatography-mass spectrometry-olfactometer was used to identify and measure the odor substances in artificial boards. The activity value (OAV) of fiberboard odor substances was calculated from the mass concentration of odor compounds released by fiberboard according to the olfactory threshold of fiberboard odor substances.

[0048] Depend on Figure 2 It can be seen that after spraying the deodorizer, the concentrations of six compounds, including propionic acid, hexanal, heptanal, octanal, acetophenone, and octanol, were significantly reduced. Among them, the removal effects of heptanal and octanal were the most obvious, decreasing by 47.7% and 59.75% respectively, indicating that the deodorizer has a significant reduction and control effect on the release of aldehyde and ketone volatile organic compounds and their odor.

[0049] (2) Deodorization mechanism

[0050] The surface morphology of the fiberboard before and after spraying the deodorant was observed by scanning electron microscopy. Figure 3As shown in the figure, the fiberboard surface contains numerous holes of varying sizes, which are the primary pathways for the release of formaldehyde and VOCs. After spraying the deodorizer, the board surface became smooth and flat, and the number of holes was significantly reduced, indicating that the deodorizer has good film-forming properties on the fiberboard surface, shielding the formaldehyde and other VOCs released by the board, thus helping to reduce odors in the fiberboard.

[0051] Figure 4 The infrared spectra of the fiberboard before and after spraying the deodorant are shown in Table 1. The corresponding absorption peaks are listed in Table 1. As shown in the figure, the NH bending vibration peak (3400cm -1 ~3300cm -1 ) is significantly enhanced, indicating that a large number of amino groups are attached to the surface of the board after spraying the deodorant. In addition, the stretching vibration peak of C=N (1690cm -1 ~1640cm -1 ) was significantly enhanced, which may be due to the Mannich reaction between the amino formaldehyde scavenger and the formaldehyde released from the board to form an imine structure.

[0052] The characteristic peaks in the infrared spectrum and the corresponding functional groups are shown in Table 1.

[0053] Table 1

[0054]

[0055] The mechanism of action of amino formaldehyde scavengers is as follows.

[0056]

[0057] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the description of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A poplar fiberboard deodorant, characterized in that: The invention comprises the following components in parts by mass: 22-28 parts of polyion water, 22-28 parts of amino formaldehyde scavenger, 4-6 parts of nano-TiO2, 8-12 parts of beta-cyclodextrin, 12-18 parts of porous adsorbent, 4-6 parts of surfactant and 12-18 parts of plant essential oil emulsion.

2. The poplar fiberboard deodorant according to claim 1, characterized in that The invention comprises the following components in parts by mass: 25 parts of polyion water, 25 parts of amino formaldehyde scavenger, 25 parts of nano-TiO, 10 parts of beta-cyclodextrin, 15 parts of porous adsorbent, 5 parts of surfactant and 15 parts of plant essential oil emulsion.

3. The poplar fiberboard deodorizer according to claim 1, characterized in that: The polyion water has the following concentrations of various substances: potassium ion 16.05-51.48 mmol / L, calcium ion 2.2-6.5 mmol / L, zinc ion 22.5-42.18 mmol / L, sodium ion 153.8-280.6 mmol / L, and glucose 60-280 mmol / L.

4. The poplar fiberboard deodorizer according to claim 1, characterized in that: The amino formaldehyde scavenger includes one or more of carboxymethyl chitosan and polyethylene imine, preferably carboxymethyl chitosan.

5. The poplar fiberboard deodorizer according to claim 1, characterized in that: The porous adsorbent is one or more of diatomaceous earth, activated carbon, and bentonite, preferably diatomaceous earth.

6. The poplar fiberboard deodorizer according to claim 1, characterized in that: The surfactant is alkyl polyglycoside APG.

7. The poplar fiberboard deodorizer according to claim 1, characterized in that: The plant essential oil includes one or more of eucalyptus oil, tea tree oil, and limonene, preferably eucalyptus oil.

8. A method for preparing the poplar fiberboard deodorant according to any one of claims 1 to 7, characterized in that: The steps include: A. Dissolve potassium chloride, calcium oxide, and zinc chloride in deionized water, and add sodium bicarbonate and glucose to the solution to obtain polyionized water; B. mixing the plant essential oil with a small amount of ethanol to obtain solution A, slowly adding solution A to polyion water, homogenizing and emulsifying, to obtain plant essential oil emulsion B; C. dissolving the amino formaldehyde scavenger in deionized water and stirring until transparent to obtain solution C; D. mixing the porous adsorbent and the surfactant APG to form a stable suspension D; E. Add nano-TiO2 and β-cyclodextrin into deionized water to obtain dispersion E, and perform ultrasonic treatment to avoid agglomeration; F. The plant essential oil emulsion B, solution C, suspension D, and dispersion E are mixed according to the material ratio, and the pH of the mixture is adjusted to 7-8 with sodium hydroxide solution to obtain a poplar fiberboard deodorizer.

9. The method for preparing the poplar fiberboard deodorant according to claim 8, characterized in that: In step F, the concentration of the sodium hydroxide solution is 0.1 mol / L.

10. A use of the deodorant according to any one of claims 1 to 7, characterized in that: Spray it on the surface of poplar fiberboard with a spraying amount of 10 to 200 g / m 2 .

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