CN112058228A - Formaldehyde scavenging agent and preparation method thereof - Google Patents
Formaldehyde scavenging agent and preparation method thereof Download PDFInfo
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 187
- 239000002516 radical scavenger Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 62
- 239000002028 Biomass Substances 0.000 claims abstract description 28
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000002156 mixing Methods 0.000 claims abstract description 21
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 20
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 150000001413 amino acids Chemical class 0.000 claims abstract description 11
- 238000001354 calcination Methods 0.000 claims abstract description 11
- 239000004094 surface-active agent Substances 0.000 claims abstract description 9
- 239000000654 additive Substances 0.000 claims abstract description 7
- 230000000996 additive effect Effects 0.000 claims abstract description 7
- 239000003960 organic solvent Substances 0.000 claims abstract description 7
- 239000000243 solution Substances 0.000 claims description 26
- 239000010902 straw Substances 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 13
- 235000007164 Oryza sativa Nutrition 0.000 claims description 12
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 12
- 235000009566 rice Nutrition 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 241000209140 Triticum Species 0.000 claims description 10
- 235000021307 Triticum Nutrition 0.000 claims description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- 239000003755 preservative agent Substances 0.000 claims description 6
- 230000002335 preservative effect Effects 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 5
- 239000004475 Arginine Substances 0.000 claims description 4
- KDXKERNSBIXSRK-UHFFFAOYSA-N Lysine Natural products NCCCCC(N)C(O)=O KDXKERNSBIXSRK-UHFFFAOYSA-N 0.000 claims description 4
- 239000004472 Lysine Substances 0.000 claims description 4
- ODKSFYDXXFIFQN-UHFFFAOYSA-N arginine Natural products OC(=O)C(N)CCCNC(N)=N ODKSFYDXXFIFQN-UHFFFAOYSA-N 0.000 claims description 4
- 239000002781 deodorant agent Substances 0.000 claims description 4
- 241000609240 Ambelania acida Species 0.000 claims description 2
- 229920000742 Cotton Polymers 0.000 claims description 2
- 244000068988 Glycine max Species 0.000 claims description 2
- 235000010469 Glycine max Nutrition 0.000 claims description 2
- ODKSFYDXXFIFQN-BYPYZUCNSA-P L-argininium(2+) Chemical compound NC(=[NH2+])NCCC[C@H]([NH3+])C(O)=O ODKSFYDXXFIFQN-BYPYZUCNSA-P 0.000 claims description 2
- HNDVDQJCIGZPNO-YFKPBYRVSA-N L-histidine Chemical compound OC(=O)[C@@H](N)CC1=CN=CN1 HNDVDQJCIGZPNO-YFKPBYRVSA-N 0.000 claims description 2
- KDXKERNSBIXSRK-YFKPBYRVSA-N L-lysine Chemical compound NCCCC[C@H](N)C(O)=O KDXKERNSBIXSRK-YFKPBYRVSA-N 0.000 claims description 2
- 240000008042 Zea mays Species 0.000 claims description 2
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 2
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 2
- 239000010905 bagasse Substances 0.000 claims description 2
- 235000005822 corn Nutrition 0.000 claims description 2
- HNDVDQJCIGZPNO-UHFFFAOYSA-N histidine Natural products OC(=O)C(N)CC1=CN=CN1 HNDVDQJCIGZPNO-UHFFFAOYSA-N 0.000 claims description 2
- 239000002304 perfume Substances 0.000 claims 2
- 240000007594 Oryza sativa Species 0.000 claims 1
- 230000000845 anti-microbial effect Effects 0.000 claims 1
- 239000004599 antimicrobial Substances 0.000 claims 1
- 238000004140 cleaning Methods 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 abstract description 2
- 238000001179 sorption measurement Methods 0.000 description 14
- 241000209094 Oryza Species 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 5
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- 230000002159 abnormal effect Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
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- 239000000126 substance Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- NHBRUUFBSBSTHM-UHFFFAOYSA-N n'-[2-(3-trimethoxysilylpropylamino)ethyl]ethane-1,2-diamine Chemical compound CO[Si](OC)(OC)CCCNCCNCCN NHBRUUFBSBSTHM-UHFFFAOYSA-N 0.000 description 3
- 230000001699 photocatalysis Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000001877 deodorizing effect Effects 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 239000000686 essence Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 239000011592 zinc chloride Substances 0.000 description 2
- QHQNYHZHLAAHRW-UHFFFAOYSA-N 2-trimethoxysilylethanamine Chemical compound CO[Si](OC)(OC)CCN QHQNYHZHLAAHRW-UHFFFAOYSA-N 0.000 description 1
- HXLAEGYMDGUSBD-UHFFFAOYSA-N 3-[diethoxy(methyl)silyl]propan-1-amine Chemical compound CCO[Si](C)(OCC)CCCN HXLAEGYMDGUSBD-UHFFFAOYSA-N 0.000 description 1
- ZYAASQNKCWTPKI-UHFFFAOYSA-N 3-[dimethoxy(methyl)silyl]propan-1-amine Chemical compound CO[Si](C)(OC)CCCN ZYAASQNKCWTPKI-UHFFFAOYSA-N 0.000 description 1
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 description 1
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 206010043275 Teratogenicity Diseases 0.000 description 1
- 208000030961 allergic reaction Diseases 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 231100000481 chemical toxicant Toxicity 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000008098 formaldehyde solution Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000036737 immune function Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 230000003908 liver function Effects 0.000 description 1
- 230000004199 lung function Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000007344 nucleophilic reaction Methods 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
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- 231100000211 teratogenicity Toxicity 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
- B01J2220/4825—Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a formaldehyde scavenger and a preparation method thereof, and belongs to the technical field of formaldehyde scavengers. The formaldehyde scavenger comprises the following components in percentage by weight: 40-60% of biomass activated carbon, 10-20% of amino acid, 1-5% of silane coupling agent, 1-5% of surfactant, 20-30% of organic solvent and 3-5% of additive; wherein the biomass activated carbon is obtained by mixing a biomass raw material with 50-80% phosphoric acid solution and calcining at 400-600 ℃. The formaldehyde scavenger can efficiently adsorb and fix formaldehyde, and cannot cause secondary pollution.
Description
Technical Field
The invention relates to a formaldehyde scavenger and a preparation method thereof, belonging to the technical field of formaldehyde scavenging.
Background
Formaldehyde is colorless, irritant and asphyxiant toxic gas, is an important risk source for human health, and can cause abnormal smell, abnormal lung function, abnormal liver function, abnormal immune function and the like, the formaldehyde is determined as an allergic reaction source with carcinogenicity and teratogenicity by the world health organization, the formaldehyde is listed as a first carcinogen by the international cancer organization, and the formaldehyde is also listed as a toxic chemical priority control list in China.
Currently, the methods for removing formaldehyde mainly include activated carbon adsorption, photocatalytic oxidation, chemical catalytic oxidation, microbial formaldehyde degradation, plant absorption, and the like. Wherein, the active carbon adsorption method can release harmful components again after the adsorption is saturated, and has potential hazard; the photocatalytic oxidation method needs to be irradiated by ultraviolet rays, but the ultraviolet rays in sunlight only account for 10 percent, and most indoor areas cannot be irradiated by the ultraviolet rays, so the photocatalytic oxidation method is not suitable for household use; the chemical catalytic oxidation method can react with the captured formaldehyde through active groups, but the formaldehyde capturing activity is poor due to poor adsorption performance, and the formaldehyde capturing activity is poor, so that the formaldehyde can be effectively treated only by being doped into the surface of a carrier and being dispersed to more indoor positions; and the microbial formaldehyde degradation method and the plant absorption method have lower treatment speed and are suitable for removing formaldehyde for a long time in an auxiliary manner. At present, no formaldehyde removing method which is convenient to use, high in formaldehyde removing efficiency and free of secondary pollution exists.
Disclosure of Invention
In order to solve the problems, the invention provides a formaldehyde scavenger. The formaldehyde scavenger can efficiently adsorb formaldehyde and cannot cause secondary pollution.
The invention aims to provide a formaldehyde scavenger which comprises the following components in percentage by weight: 40-60% of biomass activated carbon, 10-20% of amino acid, 1-5% of silane coupling agent, 1-5% of surfactant, 20-30% of organic solvent and 3-5% of additive;
wherein the biomass activated carbon is obtained by mixing a biomass raw material with 50-80% phosphoric acid solution, calcining at 400-600 ℃ and washing with water at 60-80 ℃.
Furthermore, the amino acid is grafted on the biomass activated carbon through a silane coupling agent.
Further, the amino acid is arginine, lysine or histidine.
Further, the silane coupling agent is one or more of diethylenetriaminopropyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-aminopropylmethyldimethoxysilane, 3-aminopropylmethyldiethoxysilane and 2-aminoethyltrimethoxysilane.
Further, the organic solvent is one or more of ethanol, ethylene glycol and propylene glycol.
Further, the biomass raw material is one or more of rice hull, wheat straw, bagasse, corn straw, cotton straw, rape straw and soybean straw.
Further, the additive is one or more of essence, deodorant, preservative and antibacterial agent.
Further, the essence is fendorin.
The second purpose of the invention is to provide a preparation method of the formaldehyde scavenger, which comprises the following steps:
s1, mixing the biomass raw material with 50-80% phosphoric acid solution, calcining the mixed solution at 400-600 ℃ for 1-2h, washing with water at 60-80 ℃ and drying to obtain biomass activated carbon;
s2, dissolving a silane coupling agent into an organic solvent to obtain a silane coupling agent solution, uniformly stirring and mixing biomass activated carbon, amino acid and the silane coupling agent solution, adding a surfactant and an additive, uniformly mixing, and drying to obtain the formaldehyde scavenger.
Further, the mass ratio of the phosphoric acid solution to the biomass raw material is 4: 1-6: 1.
Further, the drying is carried out at 60-80 ℃.
According to the invention, the biomass activated carbon is prepared by phosphoric acid at high temperature, most of carbon and silicon substances in the biomass raw material are reserved, and silicon molecules are reserved in the carbon skeleton of the prepared activated carbon, so that on one hand, the long-acting supporting capacity of the carbon skeleton is improved, on the other hand, abundant silicon molecules can improve the bonding capacity between the interior of pores of the activated carbon and amino acid, and further the stability of formaldehyde adsorption is improved;
further, the invention selects basic amino acid, has high amino content, can more effectively attack carbon-oxygen double bonds in formaldehyde molecules, generates nucleophilic reaction, forms stable macromolecular compounds at normal temperature, and further fixes formaldehyde;
the biomass activated carbon has a stable structure, and the adsorption efficiency is not influenced due to the fact that pores collapse caused by adsorption of pollutants such as formaldehyde and water; the biomass activated carbon has a micro-mesoporous structure, large specific surface area and high adsorption efficiency.
The invention has the beneficial effects that:
the formaldehyde scavenger can efficiently adsorb and fix formaldehyde, and cannot cause secondary pollution.
Drawings
FIG. 1 is a rice hull activated carbon adsorption/desorption curve.
Detailed Description
The present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the examples are not intended to limit the present invention.
Example 1:
the preparation method of the formaldehyde scavenger comprises the following steps:
s1, crushing the rice hulls to 80 meshes, mixing the rice hulls with 60% phosphoric acid solution according to the impregnation ratio of 5:1 (namely the mass ratio of the phosphoric acid solution to the biomass raw material), calcining the mixed solution in a calcining furnace at 500 ℃ for 1h, washing with water at 60 ℃, and drying to obtain rice hull activated carbon;
s2, dissolving 3% of diethylenetriaminopropyltrimethoxysilane into a 25% ethanol solvent according to the weight percentage to obtain a silane coupling agent solution, stirring and uniformly mixing 50% of rice hull activated carbon, 15% of arginine and the silane coupling agent solution, adding 3% of surfactant, 2% of fendorin, 1% of deodorizing agent and 1% of preservative, uniformly mixing, and drying at 70 ℃ to obtain the formaldehyde scavenger.
Detecting the specific surface area and the pore volume of the rice hull activated carbon prepared in the step S1 by using a specific surface area and pore size analyzer, wherein the specific surface area is 1823m2The pore volume is 1.82mL/g, and the adsorption capacity of the activated carbon is P/P as seen from the adsorption and desorption curve0The material begins to sharply rise at very low temperature, which indicates that the micropore occupation ratio of the material is large, and a hysteresis loop appears in a curve, which indicates that the material has a mesoporous structure.
Example 2:
the preparation method of the formaldehyde scavenger comprises the following steps:
s1, grinding the wheat straws to 80 meshes, mixing the ground wheat straws with 50% phosphoric acid solution according to a dipping ratio of 6:1 (namely the mass ratio of the phosphoric acid solution to the biomass raw material), calcining the mixed solution in a calcining furnace at 400 ℃ for 2 hours, washing with water at 70 ℃, and drying to obtain the wheat straw activated carbon;
s2, dissolving 2% of 3-aminopropyltriethoxysilane in 20% of propylene glycol solvent to obtain a silane coupling agent solution, stirring and uniformly mixing 60% of wheat straw activated carbon, 10% of lysine and the silane coupling agent solution, adding 3% of surfactant, 3% of fendorin, 1% of deodorant and 1% of preservative, uniformly mixing, and drying at 80 ℃ to obtain the formaldehyde scavenger.
Example 3:
the preparation method of the formaldehyde scavenger comprises the following steps:
s1, grinding the wheat straws to 80 meshes, mixing the ground wheat straws with 80% phosphoric acid solution according to a dipping ratio of 4:1 (namely the mass ratio of the phosphoric acid solution to the biomass raw material), calcining the mixed solution in a calcining furnace at 600 ℃ for 1h, washing with water at 80 ℃, and drying to obtain the wheat straw activated carbon;
s2, dissolving 5% of 3-aminopropyltriethoxysilane in 30% of propylene glycol solvent to obtain a silane coupling agent solution, stirring and uniformly mixing 40% of wheat straw activated carbon, 20% of lysine and the silane coupling agent solution, adding 1% of surfactant, 2% of fendorin, 1% of deodorant and 1% of preservative, uniformly mixing, and drying at 80 ℃ to obtain the formaldehyde scavenger.
Comparative example 1:
s1, crushing the rice hulls to 80 meshes, and immersing the rice hull powder into the solution containing 40% ZnCl2ZnCl of2The solution was left for 18 hours, then the slurry was calcined in a calciner at 500 ℃ for 1 hour, and the product was washed successively with 0.5mol HCl, 60 ℃ water to remove residual ZnCl2Mixing with mineral substances, and oven drying to obtain rice hull activated carbon;
s2, dissolving 3% of diethylenetriaminopropyltrimethoxysilane into a 25% ethanol solvent according to the weight percentage to obtain a silane coupling agent solution, stirring and uniformly mixing 50% of rice hull activated carbon, 15% of arginine and the silane coupling agent solution, adding 3% of surfactant, 2% of fendorin, 1% of deodorizing agent and 1% of preservative, uniformly mixing, and drying at 70 ℃ to obtain the formaldehyde scavenger.
And (3) testing the formaldehyde removal effect:
5 spaces (0.5 m) with the same volume are arranged by adopting a glass cover3) Separately dropping 35% formaldehyde solution, measuring the formaldehyde content in five closed spaces by using a formaldehyde tester, placing 15g of the formaldehyde scavenger prepared in the examples 1-3 and the comparative example 1 into a beaker, placing the beaker in four closed spaces, and using one space as a blank test, and testing the formaldehyde concentration in 6h, 12h, 18h, 24h and 72h, respectively, and the results are shown in table 1:
TABLE 1
According to the results in table 1, the initial adsorption rate of the formaldehyde scavenger of the present invention is similar to that of the formaldehyde scavenger of the comparative example, but the adsorption rate of the formaldehyde scavenger of the present invention is greatly improved after a period of time, and the formaldehyde scavenger of the present invention can almost completely adsorb and fix formaldehyde and does not re-release formaldehyde after about 24 hours, whereas the adsorption rate of the formaldehyde scavenger of the comparative example is slow at the later stage of the adsorption treatment, and formaldehyde has the possibility of secondary release compared with the blank test.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. The formaldehyde scavenger is characterized by comprising the following components in percentage by weight: 40-60% of biomass activated carbon, 10-20% of amino acid, 1-5% of silane coupling agent, 1-5% of surfactant, 20-30% of organic solvent and 3-5% of additive;
wherein the biomass activated carbon is obtained by mixing a biomass raw material with 50-80% phosphoric acid solution and calcining at 400-600 ℃.
2. The formaldehyde scavenger according to claim 1, wherein the amino acid is grafted onto the biomass activated carbon by a silane coupling agent.
3. The formaldehyde scavenger of claim 1, wherein the amino acid is arginine, lysine, or histidine.
4. The formaldehyde scavenger according to claim 1, wherein the organic solvent is one or more of ethanol, ethylene glycol, and propylene glycol.
5. The formaldehyde scavenger according to claim 1, wherein the biomass raw material is one or more of rice hull, wheat straw, bagasse, corn straw, cotton straw, rape straw, and soybean straw.
6. The formaldehyde scavenger according to claim 1, wherein the additive is one or more of a perfume, a deodorant, a preservative, and an antimicrobial.
7. The formaldehyde scavenger according to claim 6, wherein the perfume compound is fendorin.
8. A method for preparing the formaldehyde scavenger according to any one of claims 1 to 7, comprising the steps of:
s1, mixing the biomass raw material with 50-80% phosphoric acid solution, calcining the mixed solution at 400-600 ℃ for 1-2h, cleaning and drying to obtain biomass activated carbon;
s2, dissolving a silane coupling agent into an organic solvent to obtain a silane coupling agent solution, uniformly stirring and mixing biomass activated carbon, amino acid and the silane coupling agent solution, adding a surfactant and an additive, uniformly mixing, and drying to obtain the formaldehyde scavenger.
9. The method according to claim 8, wherein the mass ratio of the phosphoric acid solution to the biomass raw material is 4: 1-6: 1.
10. The method of claim 8, wherein said drying is at 60-80 ℃.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114272736A (en) * | 2021-12-31 | 2022-04-05 | 四川轻化工大学 | Formaldehyde scavenging agent and preparation method thereof |
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| CN110182801A (en) * | 2019-04-01 | 2019-08-30 | 复旦大学 | A method of granular activated carbon is prepared with biomass |
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| CN114272736A (en) * | 2021-12-31 | 2022-04-05 | 四川轻化工大学 | Formaldehyde scavenging agent and preparation method thereof |
| CN114272736B (en) * | 2021-12-31 | 2022-11-22 | 四川轻化工大学 | Formaldehyde scavenging agent and preparation method thereof |
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Application publication date: 20201211 |