CN114307989B - Formaldehyde-removing nano emulsion composition and preparation method thereof - Google Patents
Formaldehyde-removing nano emulsion composition and preparation method thereof Download PDFInfo
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- 239000000203 mixture Substances 0.000 title claims abstract description 35
- 239000007908 nanoemulsion Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 78
- 229920000767 polyaniline Polymers 0.000 claims abstract description 58
- 229910021595 Copper(I) iodide Inorganic materials 0.000 claims abstract description 36
- LSXDOTMGLUJQCM-UHFFFAOYSA-M copper(i) iodide Chemical compound I[Cu] LSXDOTMGLUJQCM-UHFFFAOYSA-M 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000013081 microcrystal Substances 0.000 claims abstract description 24
- ZRXVCYGHAUGABY-UHFFFAOYSA-N 4-bromo-n,n-bis(4-bromophenyl)aniline Chemical compound C1=CC(Br)=CC=C1N(C=1C=CC(Br)=CC=1)C1=CC=C(Br)C=C1 ZRXVCYGHAUGABY-UHFFFAOYSA-N 0.000 claims abstract description 19
- QZHXKQKKEBXYRG-UHFFFAOYSA-N 4-n-(4-aminophenyl)benzene-1,4-diamine Chemical compound C1=CC(N)=CC=C1NC1=CC=C(N)C=C1 QZHXKQKKEBXYRG-UHFFFAOYSA-N 0.000 claims abstract description 18
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 26
- 239000007795 chemical reaction product Substances 0.000 claims description 22
- 230000035484 reaction time Effects 0.000 claims description 20
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 18
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 claims description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 17
- 239000012065 filter cake Substances 0.000 claims description 16
- 229930182830 galactose Natural products 0.000 claims description 14
- 229910052763 palladium Inorganic materials 0.000 claims description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 12
- BWLBGMIXKSTLSX-UHFFFAOYSA-N 2-hydroxyisobutyric acid Chemical compound CC(C)(O)C(O)=O BWLBGMIXKSTLSX-UHFFFAOYSA-N 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 10
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 9
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 7
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 5
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 5
- SYXYWTXQFUUWLP-UHFFFAOYSA-N sodium;butan-1-olate Chemical group [Na+].CCCC[O-] SYXYWTXQFUUWLP-UHFFFAOYSA-N 0.000 claims description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 abstract description 108
- 238000006116 polymerization reaction Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 8
- 229910017053 inorganic salt Inorganic materials 0.000 abstract description 8
- 238000005859 coupling reaction Methods 0.000 abstract description 5
- 239000006227 byproduct Substances 0.000 abstract description 3
- 230000002194 synthesizing effect Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 27
- 238000001179 sorption measurement Methods 0.000 description 25
- 229910052757 nitrogen Inorganic materials 0.000 description 14
- MFRIHAYPQRLWNB-UHFFFAOYSA-N sodium tert-butoxide Chemical compound [Na+].CC(C)(C)[O-] MFRIHAYPQRLWNB-UHFFFAOYSA-N 0.000 description 14
- 238000012360 testing method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 9
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- 239000003463 adsorbent Substances 0.000 description 8
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- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 230000010802 Oxidation-Reduction Activity Effects 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 238000003795 desorption Methods 0.000 description 4
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- 230000009286 beneficial effect Effects 0.000 description 3
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- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 125000001841 imino group Chemical group [H]N=* 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 230000003373 anti-fouling effect Effects 0.000 description 2
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- 238000013461 design Methods 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- WTAPZWXVSZMMDG-UHFFFAOYSA-N 1,5-diphenylpenta-1,4-dien-3-one;palladium Chemical compound [Pd].C=1C=CC=CC=1C=CC(=O)C=CC1=CC=CC=C1 WTAPZWXVSZMMDG-UHFFFAOYSA-N 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 208000005623 Carcinogenesis Diseases 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- 206010035664 Pneumonia Diseases 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000036952 cancer formation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 231100000504 carcinogenesis Toxicity 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- MLWTXFLMRFJZCA-UHFFFAOYSA-N dibenzylidenepalladium Chemical compound C=1C=CC=CC=1C=[Pd]=CC1=CC=CC=C1 MLWTXFLMRFJZCA-UHFFFAOYSA-N 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
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- 239000003446 ligand Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000013309 porous organic framework Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
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- 208000023504 respiratory system disease Diseases 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- 238000009210 therapy by ultrasound Methods 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a formaldehyde-removing nano emulsion composition, which is prepared by synthesizing conjugated polyaniline with a microporous network structure by coupling reaction of tris (4-bromophenyl) amine and 4,4' -diaminodiphenylamine, wherein nano cuprous iodide mesoporous microcrystal is added in the reaction process to optimize the microporous structure of the conjugated polyaniline and increase the surface area of the conjugated polyaniline. On one hand, the invention solves the technical problem that the conjugated polyaniline with a micropore structure generates byproducts with low porosity in the polymerization process; on the other hand, the technical problems of micropore retraction and surface area reduction caused by water loss of inorganic salt dissolved in water when the micropore structure is optimized by using the inorganic salt are solved. The invention has excellent formaldehyde removal performance and good durability of purifying effect.
Description
Technical Field
The invention relates to the technical field of organic matter synthesis, in particular to a formaldehyde-removing nano emulsion composition and a preparation method thereof.
Background
In recent years, environmental pollution caused by formaldehyde has attracted a great deal of attention. Formaldehyde is one of the most common volatile organic compounds released from indoor furniture, wooden building products, decorations, and the like; long-term exposure to formaldehyde has a wide range of stimuli to the human body, can cause headache, pneumonia, respiratory diseases and even leukemia and has a risk of carcinogenesis. Therefore, how to safely and effectively remove formaldehyde is an important point of air cleaning. Physical adsorption is commonly used for removing formaldehyde in the traditional method, and besides low cost and simple operation, the physical adsorption method also has a plurality of adsorbents with selectable designs, and can flexibly select adsorbents such as active carbon, silicon dioxide, metal oxide, ultraviolet manganese oxide and the like according to requirements. Although the above materials show good effect in the adsorption process of formaldehyde, the adsorption capacity and the removal rate of the adsorbents are still low, and meanwhile, desorption easily occurs under the change of external environment, so that formaldehyde is released again. Formaldehyde molecules have polarity and show strong interaction affinity to functional groups containing hetero atoms such as hydroxyl, carbonyl, amino and the like; the adsorption affinity of the adsorbent can be improved by modifying the surface of the adsorbent with these functional groups. On the other hand, the pores on the material are also being used in the adsorption of formaldehyde, providing adsorption sites for the storage of formaldehyde, which is closely related not only to the adsorption capacity in the presence of reaction sites in the pores, but also to the reaction efficiency.
Patent CN 102728298A discloses a formaldehyde-removing nano-liquid for ceramic tile and a formaldehyde-removing ceramic tile production process, which uses porous mineral substance-loaded titanium dioxide composite material and ceramic tile anti-fouling liquid, wherein the porous mineral substance-loaded titanium dioxide composite material is added into the ceramic tile anti-fouling liquid to form a mixture so as to realize the purpose of long-acting formaldehyde removal. The invention provides a furniture board paint process for removing formaldehyde and a formaldehyde removing solution, which uses the formaldehyde removing solution to catalyze water and oxygen in air to generate oxidation-reduction reaction under the condition of presence and absence of light, so as to generate hydroxyl free radicals with strong oxidizing power, and the effect of the hydroxyl free radicals plays a role in decomposing formaldehyde. The above-mentioned patent may have problems of low specific surface area and unstable chemical properties, and easy oxidative deterioration, and the formaldehyde removal efficiency in actual use may be difficult to achieve the design effect.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the technical problems to be solved by the present invention are: (1) Providing a formaldehyde-removing nano emulsion composition which has a porous three-dimensional network structure, contains groups with strong affinity with formaldehyde, and has good adsorption performance on formaldehyde from physical and chemical aspects; (2) Solves the technical problem that the conjugated polyaniline with a micropore structure generates byproducts with low porosity in the polymerization process; (3) Solves the technical problems of micropore retraction and surface area reduction caused by water loss of inorganic salt dissolved in water when the micropore structure is optimized by using the inorganic salt.
Compared with the traditional formaldehyde absorbing medium, the conjugated polymer is a substance with a porous organic framework structure, can form a three-dimensional network with expansibility, and has higher surface area and stability. In the preparation of conjugated polymers, the structure can be controlled by adjusting the degree of polymerization. The inventor prepares conjugated polyaniline with a micropore structure by using tri (4-bromophenyl) amine and 4,4 '-diaminodiphenylamine, and the reaction uses a palladium catalyst to form carbon-nitrogen bonds between the tri (4-bromophenyl) amine and the 4,4' -diaminodiphenylamine for polymerization, and the micropore structure of the conjugated polyaniline is beneficial to improving the adsorption surface area and increasing the adsorption performance on formaldehyde; meanwhile, the conjugated polyaniline contains a large amount of imino groups with oxidation-reduction activity in the molecule, so that the adsorption capacity of formaldehyde under low concentration can be improved.
A preparation method of formaldehyde-removing nano emulsion composition comprises the following steps: the method is characterized in that the conjugated polyaniline with a micropore network structure is synthesized by coupling reaction of tri (4-bromophenyl) amine and 4,4' -diaminodiphenylamine, and nano cuprous iodide mesoporous microcrystals are added in the reaction process to optimize the micropore structure of the conjugated polyaniline and increase the surface area of the conjugated polyaniline.
Preferably, a preparation method of the formaldehyde-removing nano emulsion composition comprises the following steps:
s1, dissolving anhydrous copper sulfate in galactose solution, then adding potassium iodide for reaction, filtering a reaction product to obtain a filter cake, washing with water, and drying to obtain nano cuprous iodide Kong Weijing;
s2, under the anaerobic condition, mixing tris (4-bromophenyl) amine and 4,4 '-diaminodiphenylamine with tetrahydrofuran, adding sodium tert-butoxide, 2-dicyclohexylphosphorus-2', 4',6' -triisopropylbiphenyl and bis (dibenzylidene) palladium acetonate after mixing, and carrying out a first-stage reaction to obtain a primary reaction product;
s3, under the anaerobic condition, adding the nano cuprous iodide mesoporous microcrystal into the primary reaction product, performing a second-stage reaction, filtering after the reaction is finished to obtain a filter cake, washing with alcohol, and drying to obtain conjugated microporous polyaniline;
s4, dispersing the conjugated microporous polyaniline in water to obtain the formaldehyde-removing nano emulsion composition.
Although the conjugated polyaniline has the advantages, by-products with low porosity are generated in the coupling reaction process by using the palladium catalyst, so that the adsorption efficiency of the conjugated polyaniline is reduced. In order to solve the technical problem, the inventor improves the micropore structure of the conjugated polyaniline by adding nano cuprous iodide mesoporous microcrystals in the synthesis process. The cuprous iodide mesoporous microcrystal is favorable for dipole interaction and hydrogen bond interaction of the solvent, and can increase the compatibility between the solvent and the polymer in the polymerization process; the ion of the cuprous iodide mesoporous microcrystal can improve the aperture of the polymer, so that the surface area of the conjugated polyaniline is increased; in addition, the cuprous iodide has redox activity and can react with formaldehyde after adsorption, so that desorption of formaldehyde is further prevented.
In the process of preparing nano cuprous iodide mesoporous crystallites, the inventor firstly uses galactose to reduce copper ions into cuprous ions, and then reacts with potassium iodide to form cuprous iodide crystallites with mesoporous structures. The specific surface area of the nano cuprous iodide mesoporous microcrystal is large, meanwhile, the nano cuprous iodide mesoporous microcrystal is insoluble in water and has good solubility in amine substances, and the porosity of the conjugated polyaniline can be greatly increased by adding the nano cuprous iodide mesoporous microcrystal in the polymerization process of the conjugated polyaniline. In addition, the inventor also observes that when the microporous structure of the conjugated polyaniline is optimized by using water-soluble inorganic salt, the inorganic salt can be dissolved in water and separated from the microporous structure in the purification and impurity removal process of the product, and part of the microporous structure is retracted due to the fact that the conjugated polyaniline is well expanded, so that the surface area is reduced. The nano cuprous iodide mesoporous microcrystal is insoluble in water and is not easy to separate from the microporous structure, the surface area of the mesoporous microcrystal is large, and the integral surface area is further increased while the support is provided for the microporous structure.
Further preferred, the preparation method of the formaldehyde-removing nanoemulsion composition comprises the following steps in parts by weight:
a1, 9-15 parts of anhydrous copper sulfate is dissolved in 80-100 parts of galactose solution, then 18-24 parts of potassium iodide is added for reaction, a reaction product is filtered to obtain a filter cake, water washing is carried out for 3-5 times, and drying is carried out, so as to obtain nano cuprous iodide Kong Weijing;
under the anaerobic condition of A2, mixing 25-30 parts of tri (4-bromophenyl) amine and 16-22 parts of 4,4 '-diaminodiphenylamine with 30-45 parts of tetrahydrofuran, adding 35-50 parts of tertiary sodium butoxide, 1.5-3.5 parts of 2-dicyclohexylphosphorus-2', 4',6' -triisopropylbiphenyl and 1-2.5 parts of bis (dibenzylidene) palladium acetonate after mixing, and carrying out a first-stage reaction to obtain a primary reaction product;
a3, under the anaerobic condition, adding the nano cuprous iodide mesoporous microcrystal into the primary reaction product, performing a second-stage reaction, filtering after the reaction is finished to obtain a filter cake, washing with alcohol for 3-5 times, and drying to obtain conjugated microporous polyaniline;
and A4, ultrasonically dispersing the conjugated microporous polyaniline in 60-100 parts of water to obtain the formaldehyde-removing nano emulsion composition.
Further preferably, the galactose solution in step A1 contains the following components: 10 to 15 weight percent of galactose, 50 to 60 weight percent of methanol and 30 to 35 weight percent of water.
It is further preferred that the reaction temperature of the reaction in step A1 is 48 to 65℃and the reaction time is 15 to 45 minutes.
Further preferably, the reaction temperature of the first stage reaction in the step A2 is 42-54 ℃ and the reaction time is 2-6 h.
Further preferably, the reaction temperature of the second stage reaction in the step A3 is 63-78 ℃ and the reaction time is 12-36 h.
Further preferably, the ultrasonic power of the ultrasonic dispersion in the step A4 is 550-800W, the ultrasonic frequency is 28-40 kHz, and the ultrasonic time is 0.5-2 h.
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the invention.
The invention has the following description and functions of partial raw materials in the formula:
tris (4-bromophenyl) amine: organic matter, white crystal or powder, and is stable at normal temperature and normal pressure. The invention is used as a monomer raw material for synthesizing conjugated polyaniline.
4,4' -diaminodiphenylamine: the organic matter is used as monomer material for synthesizing conjugated polyaniline.
2-dicyclohexylphosphorus-2 ',4',6' -triisopropylbiphenyl: organic matters are used as ligand components in a catalytic system in a coupling reaction.
Bis dibenzylidene acetone palladium: the organic matters are insoluble in water and stable in air. The catalyst is used as a catalyst in a catalytic system in a coupling reaction.
Nano cuprous iodide medium Kong Weijing: inorganic porous material, insoluble in water and ethanol. The formaldehyde adsorbent is used as a formaldehyde adsorbent and is used for optimizing the micropore structure of conjugated polyaniline.
The invention has the beneficial effects that:
compared with the prior art, the preparation method provided by the invention has the advantages that the conjugated polyaniline with a micropore structure is prepared by using the tri (4-bromophenyl) amine and the 4,4 '-diaminodiphenylamine, and the palladium catalyst is used for forming carbon-nitrogen bonds between the tri (4-bromophenyl) amine and the 4,4' -diaminodiphenylamine for polymerization, so that the micropore structure of the conjugated polyaniline is beneficial to improving the adsorption surface area and the adsorption performance on formaldehyde is increased; meanwhile, the conjugated polyaniline contains a large amount of imino groups with oxidation-reduction activity in the molecule, so that the adsorption capacity of formaldehyde under low concentration can be improved.
Compared with the prior art, the method has the advantages that the micropore structure of the conjugated polyaniline is improved by adding the nano cuprous iodide mesoporous microcrystal in the synthesis process, and the surface area of the conjugated polyaniline is increased; meanwhile, the nano cuprous iodide mesoporous microcrystal is favorable for dipole interaction and hydrogen bond interaction of a solvent, the compatibility between the solvent and a polymer in the polymerization process can be increased, and the oxidation-reduction activity of the cuprous iodide can react with formaldehyde after adsorption, so that desorption of the formaldehyde is further prevented.
Compared with the prior art, the nano cuprous iodide mesoporous microcrystal used in the invention is insoluble in water, is not easy to separate from a micropore structure, has large self surface area, provides support for the micropore structure and further increases the whole surface area.
Detailed Description
The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention. The experimental methods, in which specific conditions are not noted in the following examples, were selected according to conventional methods and conditions, or according to the commercial specifications.
The comparative example and the examples of the present invention have the following parameters of part of raw materials:
tris (4-bromophenyl) amine, CAS number: 4316-58-9;
4,4' -diaminodiphenylamine, CAS number: 53760-27-3;
2-dicyclohexylphosphorus-2 ',4',6' -triisopropylbiphenyl, CAS no: 564483-18-7;
bis dibenzylidene palladium acetonate, CAS number: 32005-36-0.
Example 1
A preparation method of formaldehyde-removing nano emulsion composition comprises the following steps:
under the protection of A1 nitrogen, 25kg of tri (4-bromophenyl) amine and 16kg of 4,4 '-diaminodiphenylamine are mixed with 30kg of tetrahydrofuran, and after mixing, 35kg of sodium tert-butoxide, 1.5kg of 2-dicyclohexylphosphorus-2', 4',6' -triisopropylbiphenyl and 1kg of bis (dibenzylidene) palladium acetonate are added for a first-stage reaction to obtain a primary reaction product;
carrying out a second-stage reaction under the protection of nitrogen, filtering to obtain a filter cake after the reaction is finished, washing with ethanol for 3 times, and drying to obtain conjugated microporous polyaniline;
and A3, ultrasonically dispersing the conjugated microporous polyaniline in 60kg of water to obtain the formaldehyde-removing nano emulsion composition.
The reaction temperature of the first-stage reaction in the step A1 is 54 ℃ and the reaction time is 5h.
The reaction temperature of the second stage reaction in the step A2 is 72 ℃, and the reaction time is 18 hours.
The ultrasonic power of the ultrasonic dispersion in the step A3 is 550W, the ultrasonic frequency is 40kHz, and the ultrasonic time is 0.5h.
Example 2
A preparation method of formaldehyde-removing nano emulsion composition comprises the following steps:
under the protection of A1 nitrogen, 25kg of tri (4-bromophenyl) amine and 16kg of 4,4 '-diaminodiphenylamine are mixed with 30kg of tetrahydrofuran, and after mixing, 35kg of sodium tert-butoxide, 1.5kg of 2-dicyclohexylphosphorus-2', 4',6' -triisopropylbiphenyl and 1kg of bis (dibenzylidene) palladium acetonate are added for a first-stage reaction to obtain a primary reaction product;
under the protection of A2 nitrogen, adding 9kg of sodium chloride into the primary reaction product, carrying out a second-stage reaction, filtering after the reaction is finished to obtain a filter cake, washing with ethanol for 3 times, and drying to obtain conjugated microporous polyaniline;
and A3, ultrasonically dispersing the conjugated microporous polyaniline in 60kg of water to obtain the formaldehyde-removing nano emulsion composition.
The reaction temperature of the first-stage reaction in the step A1 is 54 ℃ and the reaction time is 5h.
The reaction temperature of the second stage reaction in the step A2 is 72 ℃, and the reaction time is 18 hours.
The ultrasonic power of the ultrasonic dispersion in the step A3 is 550W, the ultrasonic frequency is 40kHz, and the ultrasonic time is 0.5h.
Example 3
A preparation method of formaldehyde-removing nano emulsion composition comprises the following steps:
under the protection of A1 nitrogen, 25kg of tri (4-bromophenyl) amine and 16kg of 4,4 '-diaminodiphenylamine are mixed with 30kg of tetrahydrofuran, and after mixing, 35kg of sodium tert-butoxide, 1.5kg of 2-dicyclohexylphosphorus-2', 4',6' -triisopropylbiphenyl and 1kg of bis (dibenzylidene) palladium acetonate are added for a first-stage reaction to obtain a primary reaction product;
under the protection of A2 nitrogen, adding 9kg of sodium nitrate into the primary reaction product, carrying out a second-stage reaction, filtering after the reaction is finished to obtain a filter cake, washing with ethanol for 3 times, and drying to obtain conjugated microporous polyaniline;
and A3, ultrasonically dispersing the conjugated microporous polyaniline in 60kg of water to obtain the formaldehyde-removing nano emulsion composition.
The reaction temperature of the first-stage reaction in the step A1 is 54 ℃ and the reaction time is 5h.
The reaction temperature of the second stage reaction in the step A2 is 72 ℃, and the reaction time is 18 hours.
The ultrasonic power of the ultrasonic dispersion in the step A3 is 550W, the ultrasonic frequency is 40kHz, and the ultrasonic time is 0.5h.
Example 4
A preparation method of formaldehyde-removing nano emulsion composition comprises the following steps:
under the protection of A1 nitrogen, 25kg of tri (4-bromophenyl) amine and 16kg of 4,4 '-diaminodiphenylamine are mixed with 30kg of tetrahydrofuran, and after mixing, 35kg of sodium tert-butoxide, 1.5kg of 2-dicyclohexylphosphorus-2', 4',6' -triisopropylbiphenyl and 1kg of bis (dibenzylidene) palladium acetonate are added for a first-stage reaction to obtain a primary reaction product;
under the protection of A2 nitrogen, adding 9kg of sodium sulfate into the primary reaction product, carrying out a second-stage reaction, filtering after the reaction is finished to obtain a filter cake, washing with ethanol for 3 times, and drying to obtain conjugated microporous polyaniline;
and A3, ultrasonically dispersing the conjugated microporous polyaniline in 60kg of water to obtain the formaldehyde-removing nano emulsion composition.
The reaction temperature of the first-stage reaction in the step A1 is 54 ℃ and the reaction time is 5h.
The reaction temperature of the second stage reaction in the step A2 is 72 ℃, and the reaction time is 18 hours.
The ultrasonic power of the ultrasonic dispersion in the step A3 is 550W, the ultrasonic frequency is 40kHz, and the ultrasonic time is 0.5h.
Example 5
A preparation method of formaldehyde-removing nano emulsion composition comprises the following steps:
a1, 9kg of anhydrous copper sulfate is dissolved in 80kg of galactose solution, 18kg of potassium iodide is added for reaction, a reaction product is filtered to obtain a filter cake, deionized water is washed for 3 times, and the filter cake is dried to obtain nano cuprous iodide Kong Weijing;
under the protection of A2 nitrogen, 25kg of tri (4-bromophenyl) amine and 16kg of 4,4 '-diaminodiphenylamine are mixed with 30kg of tetrahydrofuran, and after mixing, 35kg of sodium tert-butoxide, 1.5kg of 2-dicyclohexylphosphorus-2', 4',6' -triisopropylbiphenyl and 1kg of bis (dibenzylidene) palladium acetonate are added for a first-stage reaction to obtain a primary reaction product;
adding the nano cuprous iodide mesoporous microcrystal into the primary reaction product under the protection of nitrogen, performing a second-stage reaction, filtering after the reaction is finished to obtain a filter cake, washing with ethanol for 3 times, and drying to obtain conjugated microporous polyaniline;
and A4, dispersing the conjugated microporous polyaniline in 60kg of water to obtain the formaldehyde-removing nano emulsion composition.
The galactose solution in the step A1 comprises the following components: 10wt% of galactose, 60wt% of methanol and 30wt% of deionized water.
The reaction temperature of the reaction in the step A1 is 65 ℃ and the reaction time is 25min.
The reaction temperature of the first-stage reaction in the step A2 is 54 ℃ and the reaction time is 5h.
The reaction temperature of the second-stage reaction in the step A3 is 72 ℃, and the reaction time is 18 hours.
The dispersing procedure in the step A4 is as follows: mix for 1h at a stirring rate of 600 rpm.
Example 6
A preparation method of formaldehyde-removing nano emulsion composition comprises the following steps:
a1, 9kg of anhydrous copper sulfate is dissolved in 80kg of galactose solution, 18kg of potassium iodide is added for reaction, a reaction product is filtered to obtain a filter cake, deionized water is washed for 3 times, and the filter cake is dried to obtain nano cuprous iodide Kong Weijing;
under the protection of A2 nitrogen, 25kg of tri (4-bromophenyl) amine and 16kg of 4,4 '-diaminodiphenylamine are mixed with 30kg of tetrahydrofuran, and after mixing, 35kg of sodium tert-butoxide, 1.5kg of 2-dicyclohexylphosphorus-2', 4',6' -triisopropylbiphenyl and 1kg of bis (dibenzylidene) palladium acetonate are added for a first-stage reaction to obtain a primary reaction product;
adding the nano cuprous iodide mesoporous microcrystal into the primary reaction product under the protection of nitrogen, performing a second-stage reaction, filtering after the reaction is finished to obtain a filter cake, washing with ethanol for 3 times, and drying to obtain conjugated microporous polyaniline;
and A4, ultrasonically dispersing the conjugated microporous polyaniline in 60kg of water to obtain the formaldehyde-removing nano emulsion composition.
The galactose solution in the step A1 comprises the following components: 10wt% of galactose, 60wt% of methanol and 30wt% of deionized water.
The reaction temperature of the reaction in the step A1 is 65 ℃ and the reaction time is 25min.
The reaction temperature of the first-stage reaction in the step A2 is 54 ℃ and the reaction time is 5h.
The reaction temperature of the second-stage reaction in the step A3 is 72 ℃, and the reaction time is 18 hours.
The ultrasonic power of the ultrasonic dispersion in the step A4 is 550W, the ultrasonic frequency is 40kHz, and the ultrasonic time is 0.5h.
Test example 1
The test of the formaldehyde-removing nano emulsion composition for formaldehyde purification efficiency is carried out according to specific requirements in JC/T1074-2008 coating material purification performance of indoor air purification function. In accordance with the above criteria, the present invention is labeled class II. The test environment for the test is 20 ℃ and the relative humidity is 50%; the preparation method of the test sample plate of the class II material comprises the following steps: 15g of the sample was stirred uniformly and then sprayed onto four 500 mm. Times.500 mm. Times.4 mm glass plates, and the samples were dried in a test environment for 24 hours and then tested. The test device is a standard test cabin described by the standard. The test steps of the purification efficiency and the durability of the purification effect were performed with reference to the above standards. The test results of formaldehyde removal performance of the formaldehyde removal nanoemulsion composition are shown in table 1.
TABLE 1
According to the definition in the above standard, the higher the percentage values of the purification efficiency and the durability of the purification effect, the more excellent the formaldehyde removal performance of the present invention. As can be seen from a comparison of the above examples, example 6 has the best formaldehyde removal performance. The reason for this phenomenon may be that, on the one hand, the present invention prepares a conjugated polyaniline having a microporous structure using tris (4-bromophenyl) amine and 4,4' -diaminodiphenylamine, and the reaction uses a palladium catalyst to form carbon-nitrogen bonds between the two for polymerization, the microporous structure of the conjugated polyaniline being advantageous for improving the adsorption surface area and increasing the adsorption performance to formaldehyde; meanwhile, the conjugated polyaniline contains a large amount of imino groups with oxidation-reduction activity in the molecule, so that the adsorption capacity of formaldehyde under low concentration can be improved; on the other hand, the micropore structure of the conjugated polyaniline is improved by adding the nano cuprous iodide mesoporous microcrystal in the synthesis process. The cuprous iodide mesoporous microcrystal is favorable for dipole interaction and hydrogen bond interaction of the solvent, and can increase the compatibility between the solvent and the polymer in the polymerization process; the ion of the cuprous iodide mesoporous microcrystal can improve the aperture of the polymer, so that the surface area of the conjugated polyaniline is increased; in addition, the cuprous iodide has redox activity and can react with formaldehyde after adsorption, so that desorption of formaldehyde is further prevented. The present invention uses cavitation bubbles formed in the liquid by ultrasonic treatment to contribute to the formation of free radicals, and an increase in the number of free radicals increases the adsorption efficiency of formaldehyde, which is probably a partial reason for the difference in adsorption between example 5 and example 6.
Test example 2
The specific surface area of the conjugated microporous polyaniline prepared in each embodiment of the invention is tested, and the test is carried out with reference to specific requirements in GB/T19587-2017 "determination of specific surface area of solid substance by gas adsorption BET method". The method for measuring the adsorbed gas selects a static capacity method, the adsorbent is nitrogen, and the purity of the nitrogen is not less than 99.99%. The results were averaged for 5 tests per example. The specific surface area test results of the conjugated microporous polyaniline prepared in each example of the present invention are shown in table 2.
TABLE 2
The larger the specific surface area of the conjugated microporous polyaniline is, the higher the absorption efficiency of formaldehyde is after the formaldehyde-removing nano emulsion composition is prepared. The comparison of the above examples shows that the specific surface area of the conjugated microporous polyaniline can be remarkably increased after the nano cuprous iodide mesoporous microcrystal is used. The reason for this phenomenon may be that the specific surface area of the nano cuprous iodide mesoporous crystallites is large, and the nano cuprous iodide mesoporous crystallites are insoluble in water and have good solubility in amine substances, so that the porosity of the conjugated polyaniline can be greatly increased by adding the nano cuprous iodide mesoporous crystallites in the polymerization process of the conjugated polyaniline. In addition, the inventor also observes that when the microporous structure of the conjugated polyaniline is optimized by using water-soluble inorganic salt, the inorganic salt can be dissolved in water and separated from the microporous structure in the purification and impurity removal process of the product, and part of the microporous structure is retracted due to the fact that the conjugated polyaniline is well expanded, so that the surface area is reduced. The nano cuprous iodide mesoporous microcrystal is insoluble in water and is not easy to separate from the microporous structure, the surface area of the mesoporous microcrystal is large, and the integral surface area is further increased while the support is provided for the microporous structure.
Claims (7)
1. The preparation method of the formaldehyde-removing nano emulsion composition is characterized by comprising the following steps of:
a1, 9-15 parts of anhydrous copper sulfate is dissolved in 80-100 parts of galactose solution, then 18-24 parts of potassium iodide is added for reaction, a reaction product is filtered to obtain a filter cake, water washing is carried out for 3-5 times, and drying is carried out, so as to obtain nano cuprous iodide Kong Weijing;
under the anaerobic condition of A2, mixing 25-30 parts of tri (4-bromophenyl) amine and 16-22 parts of 4,4 '-diaminodiphenylamine with 30-45 parts of tetrahydrofuran, adding 35-50 parts of tertiary sodium butoxide, 1.5-3.5 parts of 2-dicyclohexylphosphorus-2', 4',6' -triisopropylbiphenyl and 1-2.5 parts of bis (dibenzylidene) palladium acetonate after mixing, and carrying out a first-stage reaction to obtain a primary reaction product;
a3, under the anaerobic condition, adding the nano cuprous iodide mesoporous microcrystal into the primary reaction product, performing a second-stage reaction, filtering after the reaction is finished to obtain a filter cake, washing with alcohol for 3-5 times, and drying to obtain conjugated microporous polyaniline;
and A4, ultrasonically dispersing the conjugated microporous polyaniline in 60-100 parts of water to obtain the formaldehyde-removing nano emulsion composition.
2. The method for preparing the formaldehyde-removing nanoemulsion composition according to claim 1, wherein the contents of each component in the galactose solution in step A1 are as follows: 10 to 15 weight percent of galactose, 50 to 60 weight percent of methanol and 30 to 35 weight percent of water.
3. The method for preparing the formaldehyde-removing nanoemulsion composition according to claim 1, wherein the method comprises the following steps: the reaction temperature of the reaction in the step A1 is 48-65 ℃ and the reaction time is 15-45 min.
4. The method for preparing the formaldehyde-removing nanoemulsion composition according to claim 1, wherein the method comprises the following steps: the reaction temperature of the first-stage reaction in the step A2 is 42-54 ℃ and the reaction time is 2-6 h.
5. The method for preparing the formaldehyde-removing nanoemulsion composition according to claim 1, wherein the method comprises the following steps: the reaction temperature of the second-stage reaction in the step A3 is 63-78 ℃ and the reaction time is 12-36 h.
6. The method for preparing the formaldehyde-removing nanoemulsion composition according to claim 1, wherein the method comprises the following steps: the ultrasonic power of the ultrasonic dispersion in the step A4 is 550-800W, the ultrasonic frequency is 28-40 kHz, and the ultrasonic time is 0.5-2 h.
7. A formaldehyde-removing nanoemulsion composition, characterized in that: is prepared by the method according to any one of claims 1 to 6.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111484614A (en) * | 2020-03-20 | 2020-08-04 | 东华大学 | Preparation method of supercapacitor electrode material |
| AU2020101319A4 (en) * | 2020-07-10 | 2020-08-20 | Guangxi University | Method for preparing polystyrene microsphere-type cellulose-based heavy metal adsorbent |
| CN111569846A (en) * | 2020-05-27 | 2020-08-25 | 福州大学 | Microporous conjugated polyaniline adsorption material, preparation method thereof and application thereof in hexavalent chromium adsorption |
| WO2023065820A1 (en) * | 2021-10-20 | 2023-04-27 | 浙江时间新材料有限公司 | Pyridine-and-thiazole-bifunctionalized conjugated microporous polymer, and preparation method therefor and use thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111569846A (en) * | 2020-05-27 | 2020-08-25 | 福州大学 | Microporous conjugated polyaniline adsorption material, preparation method thereof and application thereof in hexavalent chromium adsorption |
| AU2020101319A4 (en) * | 2020-07-10 | 2020-08-20 | Guangxi University | Method for preparing polystyrene microsphere-type cellulose-based heavy metal adsorbent |
| WO2023065820A1 (en) * | 2021-10-20 | 2023-04-27 | 浙江时间新材料有限公司 | Pyridine-and-thiazole-bifunctionalized conjugated microporous polymer, and preparation method therefor and use thereof |
Non-Patent Citations (2)
| Title |
|---|
| Conjugated microporous poly(aniline)s for removal of low-concentration formaldehyde;Jinwei Zhu et al;《Chemical Engineering Science》;第248卷;全文 * |
| Tunable Surface Area, Porosity, and Function in Conjugated Microporous Polymers;Jie Chen et al.，;《Angew. Chem. Int. Ed.》;第58卷;1-6 * |
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