CN109440463B - Formaldehyde adsorption type fiber finishing method - Google Patents
Formaldehyde adsorption type fiber finishing method Download PDFInfo
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- CN109440463B CN109440463B CN201811167243.9A CN201811167243A CN109440463B CN 109440463 B CN109440463 B CN 109440463B CN 201811167243 A CN201811167243 A CN 201811167243A CN 109440463 B CN109440463 B CN 109440463B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
- D06M15/17—Natural resins, resinous alcohols, resinous acids, or derivatives thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
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- D—TEXTILES; PAPER
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- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/80—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with boron or compounds thereof, e.g. borides
- D06M11/82—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with boron or compounds thereof, e.g. borides with boron oxides; with boric, meta- or perboric acids or their salts, e.g. with borax
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- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
- D06M13/385—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen containing epoxy groups
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/53—Polyethers
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
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- 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
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2258/00—Sources of waste gases
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- 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
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- D—TEXTILES; PAPER
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- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/04—Vegetal fibres
- D06M2101/06—Vegetal fibres cellulosic
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- D—TEXTILES; PAPER
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- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/10—Animal fibres
- D06M2101/12—Keratin fibres or silk
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/32—Polyesters
Abstract
The invention discloses a finishing method of formaldehyde adsorption type fiber, which belongs to the field of preparation of novel textile materials and can be applied to the fields of textile, building, environmental protection, medical treatment and health and the like, and the preparation process comprises the following steps: firstly, pretreating according to the characteristics of fibers, then preparing soluble polyhydroxy compounds, and selecting cold-soluble plant tannin extract quebracho tannin, wattle bark tannin, chestnut tannin and valonia tannin to prepare a polyhydroxy compound solution; then compounding and preparing emulsion embedded with peroxide particles, adding the emulsion into waterborne polyurethane, adding a nonionic surfactant, and uniformly stirring; and finally, mixing the polyhydroxy compound with the same mass concentration and the peroxide particle emulsion according to a certain mass ratio, adding a cross-linking agent, soaking and rolling twice, baking, and then drying in vacuum at low temperature to prepare the required formaldehyde adsorption type fiber finished product.
Description
Technical Field
The invention relates to the field of preparation of novel textile materials, in particular to a finishing method of formaldehyde adsorption type fibers.
Background
In the home decoration process, formaldehyde has the greatest harm, and volatile organic compounds (TVOC) and the like are the second most harmful. Formaldehyde is a recognized potential carcinogen in the world, is a high-toxicity chemical, can strongly stimulate eyes, skin and respiratory mucosa, and can cause immunologic dysfunction, liver injury and influence on the central nervous system, thereby causing diseases such as fetal malformation, leukemia, nasopharyngeal carcinoma and the like in severe cases. The indoor formaldehyde pollution is mainly caused by artificial boards such as plywood, medium density board and shaving board, and links of using a large amount of adhesives such as furniture, plastic wallpaper and carpet. And TVOCs are mainly derived from decorative and building materials, furniture, wallpaper, carpets, textile goods, fragrances, and the like. Mainly including benzene, toluene, xylene, trichloroethylene, chloroform, naphthalene, diisocyanates and the like. TVOC has pungent odor, can cause the organism immune level to be disordered, influence the function of the central nervous system, can present various adverse symptoms, can damage the liver and hematopoietic system in serious cases, present allergic reaction and the like, and part of TVOC also has certain genotoxicity. In addition, in other environments, such as in vehicles, studios, furniture manufacturers, adhesives and synthetic compound manufacturers, formaldehyde and TVOC pollution are also prevalent, and these toxic and volatile gases do not harm people's health at all times.
At present, a plurality of methods for removing formaldehyde and TVOC are available, mainly comprising a photocatalytic oxidation method, an adsorption method, a metal oxide method, a chemical oxidation method and the like. The photocatalytic oxidation method is a novel method which is efficient and has no secondary pollution, but the preparation method is difficult, and noble metals such as silver, platinum and the like are used as catalysts, so that the cost is too high and the method is difficult to popularize and apply; the adsorption method can play a role in adsorbing formaldehyde and TVOC in a short time, but has limited adsorption force, slow absorption speed and easy saturation if no external physical power promotes, and can release the absorbent under certain conditions to cause secondary pollution; the metal oxide method requires a supported catalyst, the reaction is difficult to control, and the heavy metal pollution problem exists. Meanwhile, more synthetic chemical substances, namely, a binder and a functional reagent are added in the finishing process of the traditional textile products and synthetic fibers, and the substances can release certain formaldehyde and more TVOC pollutants. Therefore, a novel fiber finishing agent needs to be developed, which can finish various fiber textiles, can adsorb a large amount of formaldehyde and TVOC pollutants, can be used for preparing various functional products such as indoor ornaments, medical filtering materials, functional geotextiles and the like, and has good economic and social benefits.
Disclosure of Invention
The invention provides a method for finishing formaldehyde adsorption type fibers, which finishes natural materials and pollution-free and non-toxic high molecular substances on the surfaces of various fibers through embedding and chemical crosslinking reaction, and contains chemical substances which can effectively absorb and degrade formaldehyde and various TVOC pollutants in the air.
The technical scheme for realizing the invention is as follows: a method for finishing formaldehyde adsorption type fibers comprises the following steps:
(1) compounding and preparing soluble polyhydroxy compounds: dissolving cold-soluble plant tannin extract in water to prepare polyhydroxy compound solution with mass concentration of 2.5-4%;
(2) preparation of peroxide particle emulsion: uniformly mixing sodium perborate nanoparticles, waterborne polyurethane and a nonionic surfactant, adding water, and stirring to obtain peroxide particle emulsion;
(3) and (3) mixing the polyhydroxy compound solution obtained in the step (1), the peroxide particle emulsion obtained in the step (2) and the fibers subjected to alkali decrement treatment, adding a cross-linking agent, soaking and rolling the fibers twice, baking, and drying in vacuum to obtain the formaldehyde adsorption type fibers.
The cold-soluble plant tannin extract in the step (1) is any one of quebracho tannin, wattle bark tannin, chestnut tannin and valonia tannin, and the molecular weight of the cold-soluble plant tannin extract is 500-3000 Da.
In the step (2), the mass ratio of the sodium perborate nanoparticles to the aqueous polyurethane to the nonionic surfactant to water is 1: (2-5): (0.1-0.25): (25-40).
The alkali decrement treatment in the step (3) comprises the following steps: mixing fiber with 5g/L promoter FN and 6g/L NaOH solution, reacting at a bath ratio of 1:50 for 40-50min, washing with 80 deg.C hot water and normal temperature water, and oven drying.
The mass ratio of the polyhydroxy compound solution to the peroxide particle emulsion in the step (3) is (1-4): 1, the concentration of the cross-linking agent is 15-25 g/L.
The cross-linking agent in the step (4) is a cross-linking agent EH.
And (3) baking the fiber in the step (3) for 60-90 seconds at 120 ℃ at a rolling residual rate of 80% after the fiber is soaked and rolled twice, and drying the fiber in a vacuum drying oven at 30-35 ℃.
The nonionic surfactant in the step (2) is fatty alcohol polyoxyethylene ether or polyoxyethylene alkyl alcohol amine.
The fibers used in the present invention mainly include natural fibers and synthetic fibers. The natural fiber mainly comprises cotton, hemp, viscose fiber, acetate fiber, wool, silk fibroin fiber, terylene (needing alkali decrement treatment), chinlon, spandex and the like.
The invention has the beneficial effects that:
(1) the modified soluble polyhydroxy compounds are added for the first time, the polyhydroxy compounds are mainly plant polyphenols modified by sulfonate, the plant polyphenols contain a large amount of phenolic hydroxyl groups, are natural high molecular compounds and have high reaction activity, at the moment, formaldehyde (alkaline) is an electrophilic reagent, and the plant polyphenols have a plurality of nucleophilic reaction centers, so that the formaldehyde can react with the plant polyphenols to generate the plant polyphenol macromolecular substances crosslinked by the formaldehyde. Meanwhile, phenolic hydroxyl can also be physically and chemically reacted with active groups such as hydroxyl, amino and hydrogen bond in the fiber through a chemical cross-linking agent to be attached to the surface of the fiber, so that the fiber has a special function of absorbing formaldehyde. The plant polyphenol compounds mainly comprise plant tanning materials and tannin extracts, and mainly comprise gallic acid, ellagic acid, valonea acid, gallnut tanning, quebracho tannin and the like.
(2) The invention uses the cross-linking agent as a reaction vector of the plant polyphenol type compound and the fiber, and mainly comprises the cross-linking agent which is aqueous polyurethane cross-linking agent, glyoxal cross-linking agent and cross-linking agent EH. Aqueous polyurethaneThe ester contains active end group isocyanate group (-NCO), under the condition of baking and heating, the blocked polyurethane prepolymer is deblocked, the blocking agent is removed, the-NCO is recovered, and the polyurethane macromolecule can produce addition reaction or can produce addition reaction with-OH and-NH in fibre molecule2Reacting to form a network cross-linked structure on the fabric; the fiber has reactive groups such as hydroxyl, amino and the like, and can react with glyoxal to form a crosslink with a hemiacetal or ammonia alcohol structure; the mechanism formula of the crosslinking agent EH is as follows:
the two ends of the molecule of the fiber contain active epoxy groups, can react with reactive groups in hydroxyl and amino in the fiber, and the reaction is easier to carry out.
(3) The active ingredients for decomposing formaldehyde in the invention are mainly peroxide nanopowder: mainly sodium perborate nanopowder, with a diameter of 20-100 nm. The function of the water-absorbing agent is that water molecules in water vapor are absorbed and gradually decomposed under certain conditions, and hydroxyl free radicals (. OH) and superoxide ion free radicals (. O) are generated in the decomposition process2-) decomposes formaldehyde and decomposes to destroy C-C, C-H, C-N, C-O, N-H bonds in organic substances, and completely oxidizes the organic substances to harmless substances CO2And H2O。
(4) The sodium perborate nanopowder used in the invention is slightly soluble in water, needs to be embedded in aqueous polyurethane in a solution to form an oil-in-water emulsion, the aqueous polyurethane emulsion embedded with sodium perborate nanoparticles is used for finishing fiber materials, and a nonionic surfactant is needed to be added to reduce the surface tension of liquid in the process of forming the emulsion so as to promote the formation of polyurethane emulsion, wherein the used nonionic surfactant mainly comprises fatty alcohol-polyoxyethylene ether, polyoxyethylene alkyl alcohol amine and the like.
(5) The modified soluble polyhydroxy compound used in the invention mainly plays a role in adsorbing a large amount of formaldehyde, the peroxide particles mainly play a role in decomposing formaldehyde and TVOC pollutants through free radicals, and the formaldehyde can be adsorbed and decomposed better through the mutual cooperation of the two substances.
(6) The invention selects natural substances containing phenolic hydroxyl and peroxide nanoparticles as formaldehyde adsorption and decomposition materials, and the materials and the auxiliaries are natural and nontoxic, are a green method for removing formaldehyde and TVOC, and cannot generate substances which are difficult to degrade in the nature; the formaldehyde adsorption and decomposition material selected by the invention has low cost, and the finishing process and steps for the fiber are relatively simple and convenient, and compared with other effective formaldehyde adsorption and decomposition methods, the formaldehyde adsorption and decomposition material is easier to realize large-scale production in practical application, and has good economic benefit and application prospect.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
A finishing method of formaldehyde adsorption type polyester fiber comprises the following steps:
1) the polyester fiber is used as a finishing object and is firstly subjected to alkali weight reduction treatment: adding accelerator FN 5g/L and NaOH 6g/L, and reacting at bath ratio of 1:50 for 50 min. Then respectively washing with hot water of 80 ℃ and normal temperature water once, and drying for later use.
2) Compounding and preparing soluble polyhydroxy compounds: selecting cold-soluble plant tannin extract with molecular weight of 2000-3000Da, mixing the quebracho tannin and the wattle bark tannin according to the mass ratio of 1:1, adding a certain amount of water for dilution and dissolution, and preparing polyhydroxy natural compound solution with mass concentration of 2.5%.
3) Preparation of peroxide particle embedded emulsion: weighing 20g of sodium perborate nanoparticles, adding the sodium perborate nanoparticles into aqueous polyurethane with the mass multiple of 2 times, adding fatty alcohol polyoxyethylene ether with the mass ratio of 0.1 time of the mass of the polyurethane, uniformly stirring, continuously adding water at a continuous rotating speed (400 revolutions per second) until the total mass of the emulsion is 40 times that of the emulsion, and preparing the peroxide-embedded particle emulsion with the mass concentration of 2.5%.
4) Preparing a fiber padding liquid and finishing and preparing functional fibers: mixing the polyhydroxy compound prepared in the step 1 with the same mass concentration of 2.5% and the peroxide particle emulsion prepared in the step 2 according to the mass ratio of 4/1, soaking and rolling the fiber twice according to 15g/L of a crosslinking agent EH, baking the fiber for 60 seconds at the temperature of 120 ℃ at the rolling residual rate of 80%, and continuously drying the fiber in a vacuum drying oven at the temperature of 30 ℃ until all water is discharged.
The formaldehyde adsorption type polyester fiber is prepared by the method.
Example 2
A finishing method of formaldehyde adsorption viscose fiber comprises the following steps:
1. compounding and preparing soluble polyhydroxy compounds:
selecting cold-soluble plant tannin extract polyhydroxy compounds with the molecular weight of 1500-.
2. Preparation of peroxide particle embedded emulsion:
weighing 20g of sodium perborate nanoparticles by mass, adding the sodium perborate nanoparticles into aqueous polyurethane with the mass multiple of 3,
then adding fatty alcohol polyoxyethylene ether with the mass ratio of 0.15 times of the mass of the polyurethane, uniformly stirring, continuously adding water at a continuous rotating speed (450 revolutions per second) until the mass ratio of the fatty alcohol polyoxyethylene ether reaches 25 times of the total mass of the emulsion, and preparing the peroxide-embedded particle emulsion with the mass concentration range of 4%.
3. Preparing a fiber padding liquid and finishing and preparing functional fibers:
mixing the same mass concentration of the polyol prepared in step 1 with the peroxide prepared in step 2
Mixing the particle emulsions according to the mass ratio of 3/1, adding 20g/L of crosslinking agent EH, soaking and rolling the fiber twice, baking the fiber at the temperature of 120 ℃ for 80 seconds at the rolling residual rate of 80%, and continuously drying the fiber in a vacuum drying oven at the temperature of 33 ℃ until all water is discharged.
The formaldehyde adsorption viscose fiber is prepared by the method.
Example 3
A finishing method of formaldehyde adsorption type cotton fibers comprises the following steps:
1. compounding and preparing soluble polyhydroxy compounds:
selecting quebracho tannin cold-soluble plant tannin extract with molecular weight of 2000Da as polyhydroxy compound, adding a certain amount of water into the compounded cold-soluble plant tannin extract for dissolving and diluting, and preparing polyhydroxy compound solution with mass concentration of 5%.
2. Preparation of peroxide particle embedded emulsion:
weighing a certain mass of sodium perborate nanoparticles, and adding the sodium perborate nanoparticles into aqueous polyurethane with the mass multiple of 4
Adding polyoxyethylene alkyl alcohol amine with the mass ratio of 0.2 times of the mass of the polyurethane, stirring uniformly, continuously adding water at a continuous rotating speed (500 revolutions per second) until the mass ratio of the polyoxyethylene alkyl alcohol amine reaches 20 times of the total mass of the emulsion, and preparing the peroxide-embedded particle emulsion with the mass concentration range of 5%.
3. Preparing a fiber padding liquid and finishing and preparing functional fibers:
mixing the same mass concentration of the polyol prepared in step 1 with the peroxide prepared in step 2
Mixing the particle emulsions according to the mass ratio of 2/1, adding 25g/L of crosslinking agent EH, soaking and rolling the fiber twice, baking the fiber at the temperature of 120 ℃ for 90 seconds at the rolling residual rate of 80%, and continuously drying the fiber in a vacuum drying oven at the temperature of 35 ℃ until all water is discharged.
The finishing method of the formaldehyde adsorption type cotton fiber is prepared by the method.
Example 4
A finishing method of formaldehyde adsorption type wool fibers comprises the following steps:
1. compounding and preparing soluble polyhydroxy compounds: the polyhydroxy compound selects cold soluble plant tannin extract bark tannin with molecular weight of about 2800 Da. Adding a certain amount of water for dissolving and diluting to prepare a polyhydroxy compound solution with the mass concentration of 3%.
2. Preparation of peroxide particle embedded emulsion: weighing sodium perborate nanoparticles with a certain mass,
adding the mixture into aqueous polyurethane with the mass multiple of 2-5 times, adding fatty alcohol polyoxyethylene ether or polyoxyethylene alkyl alcohol amine with the mass ratio of 0.25 time of the mass of the polyurethane, uniformly stirring, continuously adding water at a continuous rotating speed (480 revolutions per second) until the total mass of the emulsion is 33 times that of the emulsion, and preparing the granular emulsion with the mass concentration range of 3 percent and the embedded peroxide.
3. Preparing a fiber padding liquid and finishing and preparing functional fibers:
mixing the same mass concentration of the polyol prepared in step 1 with the peroxide prepared in step 2
The particle emulsions were mixed in a mass ratio of 1/1, 21g/L of a crosslinking agent EH was added, the fibers were dipped and rolled twice, the percent pass was 80%, baked at 120 ℃ for 75 seconds, and then dried in a vacuum oven at 32 ℃ until all water was drained.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A finishing method of formaldehyde adsorption type fibers is characterized by comprising the following steps:
(1) compounding and preparing soluble polyhydroxy compounds: dissolving cold-soluble plant tannin extract in water to prepare polyhydroxy compound solution with mass concentration of 2.5-4%;
(2) preparation of peroxide particle emulsion: uniformly mixing sodium perborate nanoparticles, waterborne polyurethane and a nonionic surfactant, adding water, and stirring to obtain peroxide particle emulsion;
(3) and (3) mixing the polyhydroxy compound solution obtained in the step (1), the peroxide particle emulsion obtained in the step (2) and the fibers subjected to alkali decrement treatment, adding a cross-linking agent, soaking and rolling the fibers twice, baking, and drying in vacuum to obtain the formaldehyde adsorption type fibers.
2. The method for finishing the formaldehyde-adsorbing fiber according to claim 1, wherein: the cold-soluble plant tannin extract in the step (1) is any one of quebracho tannin, wattle bark tannin, chestnut tannin and valonia tannin, and the molecular weight of the cold-soluble plant tannin extract is 500-3000 Da.
3. The method for finishing the formaldehyde-adsorbing fiber according to claim 1, wherein: in the step (2), the mass ratio of the sodium perborate nanoparticles to the aqueous polyurethane to the nonionic surfactant to water is 1: (2-5): (0.1-0.25): (25-40).
4. The method for finishing the formaldehyde-adsorbing fiber according to claim 1, wherein the alkali reduction treatment in the step (3) comprises: mixing fiber with 5g/L promoter FN and 6g/L NaOH solution, reacting at a bath ratio of 1:50 for 40-50min, washing with 80 deg.C hot water and normal temperature water, and oven drying.
5. The method for finishing the formaldehyde-adsorbing fiber according to claim 1, wherein: the mass ratio of the polyhydroxy compound solution to the peroxide particle emulsion in the step (3) is (1-4): 1, the concentration of the cross-linking agent is 15-25 g/L.
6. The method for finishing the formaldehyde-adsorbing fiber according to claim 1, wherein: the cross-linking agent in the step (3) is a cross-linking agent EH.
7. The method for finishing the formaldehyde-adsorbing fiber according to claim 1, wherein: and (3) baking the fiber in the step (3) for 60-90 seconds at 120 ℃ at a rolling residual rate of 80% after the fiber is soaked and rolled twice, and drying the fiber in a vacuum drying oven at 30-35 ℃.
8. The method for finishing the formaldehyde-adsorbing fiber according to claim 1, wherein: and (3) in the step (2), the nonionic surfactant is fatty alcohol-polyoxyethylene ether or polyoxyethylene alkyl alcohol amine.
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