CN108914564B - Preparation method of moisture-absorbing, breathable and antibacterial spunlace non-woven fabric for polyurethane synthetic leather - Google Patents
Preparation method of moisture-absorbing, breathable and antibacterial spunlace non-woven fabric for polyurethane synthetic leather Download PDFInfo
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- CN108914564B CN108914564B CN201810850750.6A CN201810850750A CN108914564B CN 108914564 B CN108914564 B CN 108914564B CN 201810850750 A CN201810850750 A CN 201810850750A CN 108914564 B CN108914564 B CN 108914564B
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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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- 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
- D06M13/10—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 oxygen
- D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
- D06M13/188—Monocarboxylic acids; Anhydrides, halides or salts thereof
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- D06M11/73—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 carbon or compounds thereof
- D06M11/74—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 carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
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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
- D06M13/10—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 oxygen
- D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
- D06M13/207—Substituted carboxylic acids, e.g. by hydroxy or keto groups; Anhydrides, halides or salts thereof
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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
- D06M13/10—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 oxygen
- D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
- D06M13/207—Substituted carboxylic acids, e.g. by hydroxy or keto groups; Anhydrides, halides or salts thereof
- D06M13/21—Halogenated carboxylic acids; Anhydrides, halides or salts thereof
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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
- D06M15/01—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
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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
- D06M15/01—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
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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
- D06M15/01—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
- D06M15/03—Polysaccharides or derivatives thereof
- D06M15/13—Alginic acid or derivatives thereof
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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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- D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
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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
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Abstract
A preparation method of a moisture-absorbing, breathable and antibacterial spunlace non-woven fabric for polyurethane synthetic leather comprises the steps of soaking 44.7g of pure cotton spunlace non-woven fabric in 70g of formic acid aqueous solution for 30-90 min, taking out cotton textile fibers, placing the cotton textile fibers in 60g of acetic acid aqueous solution with the mass concentration of 15%, taking out the cotton textile fibers after 30-150 min, washing the cotton textile fibers for 3-5 times by using 100ml of mixed solution of ethanol and water with the volume ratio of 70:30, and drying the cotton textile fibers; dispersing 0.8g of sodium alginate, 0.7g of chitosan and 0.6g of emulsifier into 160g of distilled water, mixing and stirring for 50min at 60 ℃, adding 1.6g of modified cotton textile fiber and antibacterial agent, soaking for 30-90 min, taking out, then reacting for 0.5-3.5 h in 7g of soaking crosslinking agent and 80g of trifluoroacetic anhydride, drying for 15-40 min at 100 ℃, washing for 3-5 times and drying; and (3) uniformly scattering 15g of the obtained modified coconut coir product, 0.05g of carboxylated graphene sheet material, 11.6g of polyurethane adhesive and 2.1g of substance A on the surface of the moisture-absorbing and air-permeable spunlace woven material obtained in the step (3), folding the moisture-absorbing and air-permeable spunlace woven material in half, flattening, and placing the folded material in a 50 ℃ oven for heat preservation and reaction for 2-4 hours to obtain the moisture-absorbing, air-permeable and antibacterial spunlace non-woven fabric for polyurethane synthetic leather.
Description
Technical Field
The invention relates to a preparation method of a spunlace weaving material, in particular to a preparation method of a moisture-absorbing, breathable and antibacterial spunlace non-woven fabric for polyurethane synthetic leather.
Background
The non-woven fabric has no warp and weft, is very convenient to cut and sew, is light in weight and easy to shape, and is popular with hand fans. Because it is a fabric formed without spinning a woven fabric, it is formed by orienting or randomly arranging textile staple fibers or filaments to form a web structure and then reinforcing them by mechanical, thermal or chemical means.
The fabric is not interwoven and knitted by yarns one by one, but the fibers are directly bonded together by a physical method, so that when a user takes the fabric into the clothes, the user can find that one thread end cannot be drawn out. The non-woven fabric breaks through the traditional spinning principle and has the characteristics of short process flow, high production rate, high yield, low cost, wide application, multiple raw material sources and the like.
The spunbonded fabric and the non-woven fabric are in subordinate relationship. There are many production processes for nonwoven fabrics, among which the spunbonding method is one of the nonwoven fabric production processes (including spunbonding, melt-blowing, hot-rolling, spunlacing, most of which are currently produced by spunbonding); the non-woven fabric comprises terylene, polypropylene fiber, chinlon, spandex, acrylic fiber and the like according to components; the different components will have distinct nonwoven styles. Spun-bonded fabrics, which are commonly referred to as polyester spun-bonded and polypropylene spun-bonded; the styles of the two fabrics are very close to each other and can be distinguished only through a high-temperature test.
The non-woven fabric is a non-woven fabric which is formed by directly utilizing high polymer slices, short fibers or filaments to form a net through air flow or machinery, then carrying out spunlace, needling or hot rolling reinforcement, and finally carrying out after-treatment. A novel fabric product having a soft, air-permeable and planar structure, which is strong, durable, silky and soft without generating lint, is one of reinforcing materials, and has a cotton-like feeling, and a non-woven fabric bag which is easy to form and inexpensive as compared with cotton.
The disadvantages thereof are 1) inferior strength and durability compared to woven cloth; 2) cannot be cleaned like other cloth; 3) the fibers are aligned in a certain direction and therefore easily split from a right angle direction, and the like. The improvement of the production process therefore mainly lies in the improvement of the prevention of splitting. (4) Poor water absorption; the non-woven fabric product has the advantages of rich color, brightness, fashion, environmental protection, wide application, elegant appearance, various patterns and styles, light weight, environmental protection and recycling, and is internationally recognized as an environmental protection product for protecting the earth ecology. The product is suitable for industries such as agricultural films, shoemaking, leather making, mattresses, primary and secondary quilts, decoration, chemical engineering, printing, automobiles, building materials, furniture and the like, and industries such as clothing linings, medical and sanitary disposable operating gowns, masks, hats, bed sheets, hotel disposable tablecloths, beauty treatment, saunas and even modern fashionable gift bags, fine product bags, shopping bags, advertising bags and the like. Environmental protection product, wide application, economy and practicality. It is also called pearl canvas because of its appearance like pearl.
The nonwoven fabric is made of chemical fibers, plant fibers and the like on a wet or dry paper machine under the condition of using water or air as a suspension medium, and is called as a nonwoven fabric although the nonwoven fabric is a cloth and is not woven. The non-woven fabric is a new-generation environment-friendly material, and has the advantages of good strength, air permeability, water resistance, environmental friendliness, flexibility, no toxicity, no odor, low price and the like. It is a new-generation environment-friendly material, and has the characteristics of water repellency, air permeability, flexibility, no combustion supporting, no toxicity, no irritation, rich colors and the like. If the material is placed outdoors for natural decomposition, the longest service life is only 90 days, the material is placed indoors for decomposition within 8 years, and the material is nontoxic and harmless during combustion, so that the environment is not polluted, and the environment is protected.
(1) Medical and sanitary nonwoven fabric: surgical gowns, protective clothing, sterilization wraps, masks, diapers, household wipes, wiping cloths, wet face towels, magic towels, soft tissue rolls, beauty products, sanitary napkins, sanitary pads, disposable sanitary cloths, and the like.
(2) Non-woven fabrics for home decoration: wall cloth, tablecloth, bed sheets, bedspreads and the like.
(3) Non-woven fabric for clothing: lining, adhesive lining, flocculus, shaped cotton, various synthetic leather base fabrics and the like.
(4) Industrial non-woven fabric; the waterproof material comprises a base material of a roof waterproof coiled material and an asphalt tile, a reinforcing material, a polishing material, a filtering material, an insulating material, a cement packaging bag, geotextile, coating cloth and the like.
(5) Non-woven fabrics for agricultural use: crop protection cloth, seedling raising cloth, irrigation cloth, a heat preservation curtain and the like.
(6) Other non-woven fabrics: space cotton, heat-insulating and sound-insulating materials, oil-absorbing felt, smoke filter tips, tea bags, shoe materials and the like.
Medical treatment and health: surgical gowns, caps, covers, plaster absorbent cotton, feminine sanitary napkins, baby diapers, wet face napkins, sanitary underpants, dust covers.
Agriculture: harvest cloth and greenhouse cloth.
And (3) industrial production: the flexible disk lining, the trumpet cloth, the filter material, the sound box deadening felt, the sealing ring lining, the cable cloth, the glass fiber reinforced plastic reinforced cloth, the industrial wiping cloth, the shockproof liner, the insulating material, the adhesive tape base liner, the pipe base liner, the ventilating pipeline and the sand cloth.
Packaging: the bag comprises a composite cement bag, a bag lining cloth, a packaging base lining, quilt wadding, a storage bag and a movable jacquard bag cloth.
Clothing and shoe making: a garment liner, a flocculus, a toe cap hard liner, a heel liner, underwear, artificial deerskin, synthetic leather, a warm keeping shoe liner and a cloth shoe bottom liner.
The automotive industry: the heat insulation cushion comprises a waste textile insulation heat felt, a shockproof felt, a ceiling, a cushion lining, a carpet, a vehicle door lining, a vehicle filter element and a formed cushion.
Household clothes: sofa inner wrapping cloth, carpet, wall cloth, mirror cloth, tea bag, dust catcher filter bag, shopping bag, stamp sheet, the cover that should remunerate, cushion, sleeping bag, dry cleaning cloth, scouring pad, (window) curtain, tablecloth, lamp shade, imperial rattan mat back tectorial membrane.
Civil engineering, construction: reinforcing, filtering, felt base cloth, drainage plates, roof waterproof materials, railways, highways, dikes, slopes, harbors, sewers, heat protection, separation and drainage.
Other uses are as follows: carrier rocket, missile head heat-proof cone, tail nozzle throat lining, high-grade paper money printing paper, aerospace plane heat-resistant tile, map cloth, wall calendar cloth, artificial cloth, canvas and the like.
Coconut chaff is fiber powder of coconut husk, is a pure natural organic matter medium dropped in the processing process of coconut husk fiber, and is a processed coconut byproduct or waste. The coconut husk has good water-retaining property. The nutrient and water needed by the plant growth can be fully maintained, the loss of water and nutrients is reduced, and the root system of the plant can absorb more water and nutrients in the growth period. Secondly, the coconut husk has good air permeability. The corruption of the root system of the plant can be effectively prevented, and the healthy development of the root system of the plant is promoted; can also play a role in protecting the soil and avoid the soil from being slurried. The cost of the coconut coir is low.
201711233692.4 an antibacterial agent for non-woven fabrics, which comprises the following raw materials by weight: 40-50 parts of ethanol, 10-14 parts of polyether siloxane, 4-6 parts of preservative, 1-3 parts of formaldehyde, 5-9 parts of ammonium citrate, 8-12 parts of titanium dioxide, 12-16 parts of silicon dioxide, 12-16 parts of zinc oxide, 2-4 parts of magnesium oxide, 2-4 parts of silver oxide and 60-70 parts of water. The invention has the beneficial effects that: (1) the raw material source is rich, the manufacturing cost is low, the preparation is convenient, the non-woven fabric has the effects of sterilization, deodorization and ultraviolet resistance, and is washable, non-toxic and harmless; (2) has strong environmental protection and good durability, and can be popularized and applied to textile fiber products.
Disclosure of Invention
The invention relates to a preparation method of a moisture-absorbing, air-permeable and antibacterial spunlace non-woven fabric for polyurethane synthetic leather, which is characterized in that a coco-coir modified product is adopted to improve the moisture absorption of the material, 4-acetoxystyrene and tetraalkylammonium fluoride improve the water absorption effect of the material, trifluoroacetic anhydride improves the fixing effect of an antibacterial agent and keeps the durability of the antibacterial effect, lithium diisopropylamide and 2-hydroxypropanetricarboxylic acid improve the antibacterial effect of the antibacterial agent, and a substance A improves the dispersibility of a polyurethane adhesive, so that the polyurethane has the moisture absorption, air permeability and antibacterial property.
The preparation method of the moisture-absorbing, breathable and antibacterial spunlace non-woven fabric for the polyurethane synthetic leather is characterized by comprising the following steps of:
(1) preparation of modified coconut husk product: adding 44.5g of modified coconut coir crushed to 1-2mm into 32g of diethyl aluminum hypophosphite and 3.1g of diethylene triamine pentaacetic acid, adding 180ml of water, stirring and reacting at 95 ℃ for 1-2 h, adding 0.7g of potassium hydrogen tartrate and 2.6g of diethylene triamine pentaacetic acid, reacting at 60 ℃ for 2h, adding 0.5g of 4-acetoxystyrene and 6.2g of tetraalkylammonium fluoride, reacting at 70 ℃ for 1-3 h, standing for 0.6h, and drying at 105 ℃ for 2h to obtain a modified coconut coir product.
(2) Preparing modified cotton textile fibers: soaking 44.7g of pure cotton spunlace nonwoven fabric in 70g of formic acid aqueous solution with the mass fraction of 5%, soaking for 30-90 min at 25-60 ℃, taking out cotton textile fibers, putting the cotton textile fibers into 60g of acetic acid aqueous solution with the mass concentration of 15%, taking out after 30-150 min, washing for 3-5 times by using 100ml of mixed solution of ethanol and water with the volume ratio of 70:30, and drying;
(3) preparing a moisture-absorbing and air-permeable spunlace material: dispersing 0.8g of sodium alginate, 0.7g of chitosan and 0.6g of emulsifier into 160g of distilled water, mixing and stirring for 50min at 60 ℃, adding 1.6g of the modified cotton textile fiber and the antibacterial agent in the step (2), soaking for 30-90 min, taking out, then reacting for 0.5-3.5 h in 7g of soaking crosslinking agent and 80g of trifluoroacetic anhydride, drying for 15-40 min at 100 ℃, washing for 3-5 times, and drying;
(4) preparing the water-punched non-woven fabric for the moisture-absorbing, breathable and antibacterial polyurethane synthetic leather: and (2) uniformly scattering 15g of the modified coconut coir product obtained in the step (1), 0.05g of carboxylated graphene sheet, 11.6g of polyurethane adhesive and 2.1g of substance A on the surface of the moisture-absorbing and air-permeable spunlace woven material obtained in the step (3), folding the obtained moisture-absorbing and air-permeable spunlace woven material in half, flattening, and placing the folded material in a 50 ℃ oven for heat preservation reaction for 2-4 h to obtain the moisture-absorbing, air-permeable and antibacterial spunlace non-woven fabric for polyurethane synthetic leather.
The emulsifier is any one of sodium stearyl lactate, peregal O, sodium carboxymethylcellulose and diacetyl tartaric acid monoglyceride DATEM;
the cross-linking agent is any one of 3, 4-dihydroxy phenylacetic acid, 3-hydroxy phenylacetic acid, trimethyl hydroxyethyl propane diamine and hydroxyethyl acrylamide;
carboxylated graphene sheets: adding 0.012g of graphene sheet into 400mL of concentrated sulfuric acid, 0.3g of 4-triphenylamine borate and 0.3g of 3,4, 5-trifluorobenzene boric acid, mixing, reacting at 80 ℃, condensing and refluxing for 2h in an ultrasonic cleaner with the ultrasonic power of 500W and the ultrasonic frequency of 100KHz, diluting with 450mL of deionized water after ultrasonic treatment, then performing suction filtration by using a microporous filter membrane with the diameter of 0.2 mu m, repeatedly washing the deionized water until the deionized water is neutral, finally drying for 8h at 80 ℃, and grinding the mixture to fine powder to obtain a carboxylated graphene sheet, wherein the graphene is a graphene sheet produced by a chemical vapor deposition method;
preparation of polyurethane adhesive: the invention patent 201510974180.8 discloses a preparation method of a transparent matte waterborne polyurethane emulsion and a preparation method of an embodiment I of the transparent matte waterborne polyurethane emulsion prepared by the method.
The preparation method of the antibacterial agent comprises the following steps: adding 10g of 5-hydroxytryptophan, 3-4 g of homatropine hydrobromide and 2-bromo-2-nitro-1, 3-propanol (2-3 g) into a three-neck flask, stirring and reacting for 1-2 h at 60 ℃, adding 1-3 g of 1,2,3, 6-tetrahydro-2, 6-dioxopyrimidine-4-carboxylic acid, stirring and reacting for 1-3 h at 70 ℃, adding 1-2 g of 2, 3-pyrazinedicarboxylic acid, 1-2 g of aluminum sulfate, 15-30 g of water, 2-3 g of lithium diisopropylamide and 1.2g of 2-hydroxypropanetricarboxylic acid, stirring and reacting for 2-3 h at 65 ℃, and vacuum drying for 1h at 45 ℃ to obtain the antibacterial agent.
The preparation method of the substance A comprises the following steps: performing ester exchange reaction on 15g of methyl cyclohexylpropionate, 12g of hydroxyethyl acrylate and 0.5g of p-toluenesulfonic acid at 90-120 ℃ for 1-2 h, adding 1.3g of 2-hydroxyethylamine, 1.4g of acrylamide and 1.3g of 3-aminopropyl trihydroxysilane, adding 1-2 g of benzyl chloride and 1.2-1.6 g of trimethylolpropane, drying at 60-70 ℃ for 1-2 h, and drying at 40 ℃ to obtain a substance A.
The invention has the advantages that:
(1) the invention utilizes the good water retention property of the coconut coir, improves the hygroscopicity of the material by adopting a coconut coir modified product, improves the water absorption effect of the material by adopting 4-acetoxystyrene and tetraalkylammonium fluoride, improves the fixing effect of an antibacterial agent by using trifluoroacetic anhydride, keeps the lasting antibacterial effect, improves the antibacterial effect of the antibacterial agent by using lithium diisopropylamide and 2-hydroxypropanetricarboxylic acid, and improves the dispersibility of a polyurethane adhesive by using a substance A, so that the polyurethane has the moisture absorption, ventilation and antibacterial properties.
(2) Graphene is purchased from Chongqing Moxie technologies, Inc., but the invention is not limited to the above.
Detailed Description
Example 1
The preparation method of the moisture-absorbing, breathable and antibacterial spunlace non-woven fabric for the polyurethane synthetic leather is characterized by comprising the following steps of:
(1) preparation of modified coconut husk product: 44.5g of modified coconut coir crushed to 1-2mm is added into 32g of diethyl aluminum hypophosphite and 3.1g of diethylene triamine pentaacetic acid, 180ml of water is added, the mixture is stirred and reacted for 1 hour at the temperature of 95 ℃, 0.7g of potassium hydrogen tartrate and 2.6g of diethylene triamine pentaacetic acid are added, the mixture is reacted for 2 hours at the temperature of 60 ℃, 0.5g of 4-acetoxystyrene and 6.2g of tetraalkylammonium fluoride are added, the mixture is reacted for 1 hour at the temperature of 70 ℃, the mixture is kept stand for 0.6 hour, and the mixture is dried for 2 hours at the temperature of 105 ℃, so that a modified coconut coir product is obtained.
(2) Preparing modified cotton textile fibers: soaking 44.7g of pure cotton spunlace nonwoven fabric in 70g of formic acid aqueous solution with the mass fraction of 5%, soaking for 30min at 25 ℃, taking out cotton textile fibers, putting the cotton textile fibers into 60g of acetic acid aqueous solution with the mass concentration of 15%, taking out after 30min, washing for 3 times by using 100ml of mixed solution of ethanol and water with the volume ratio of 70:30, and drying;
(3) preparing a moisture-absorbing and air-permeable spunlace material: dispersing 0.8g of sodium alginate, 0.7g of chitosan and 0.6g of sodium stearoyl lactylate into 160g of distilled water, mixing and stirring for 50min at 60 ℃, adding 1.6g of the modified cotton textile fiber and the antibacterial agent obtained in the step (2), soaking for 30min, taking out, then soaking in 7g of 3, 4-dihydroxy phenylacetic acid and 80g of trifluoroacetic anhydride for 0.5h, drying for 15min at 100 ℃, washing for 3 times and drying;
(4) preparing the water-punched non-woven fabric for the moisture-absorbing, breathable and antibacterial polyurethane synthetic leather: and (2) uniformly scattering 15g of the modified coconut coir product obtained in the step (1), 0.05g of carboxylated graphene sheet, 11.6g of polyurethane adhesive and 2.1g of substance A on the surface of the moisture-absorbing and air-permeable spunlace woven material obtained in the step (3), folding the obtained moisture-absorbing and air-permeable spunlace woven material in half, flattening, and placing the folded material in a 50 ℃ oven for heat preservation and reaction for 2h to obtain the moisture-absorbing, air-permeable and antibacterial spunlace non-woven fabric for polyurethane synthetic leather.
Carboxylated graphene sheets: adding 0.012g of graphene sheet into 400mL of concentrated sulfuric acid, 0.3g of 4-triphenylamine borate and 0.3g of 3,4, 5-trifluorobenzene boric acid, mixing, reacting at 80 ℃, condensing and refluxing for 2h in an ultrasonic cleaner with the ultrasonic power of 500W and the ultrasonic frequency of 100KHz, diluting with 450mL of deionized water after ultrasonic treatment, then performing suction filtration by using a microporous filter membrane with the diameter of 0.2 mu m, repeatedly washing the deionized water until the deionized water is neutral, finally drying for 8h at 80 ℃, and grinding the mixture to fine powder to obtain a carboxylated graphene sheet, wherein the graphene is a graphene sheet produced by a chemical vapor deposition method;
preparation of polyurethane adhesive: the invention patent 201510974180.8 discloses a preparation method of a transparent matte waterborne polyurethane emulsion and a preparation method of an embodiment I of the transparent matte waterborne polyurethane emulsion prepared by the method.
The preparation method of the antibacterial agent comprises the following steps: adding 10g of 5-hydroxytryptophan, 3g of homatropine hydrobromide and 2g of 2-bromo-2-nitro-1, 3-propanol into a three-neck flask, stirring and reacting for 1h at 60 ℃, then adding 1g of 1,2,3, 6-tetrahydro-2, 6-dioxopyrimidine-4-carboxylic acid, stirring and reacting for 1h at 70 ℃, then adding 1g of 2, 3-pyrazinedicarboxylic acid, 1g of aluminum sulfate, 15g of water, 2g of lithium diisopropylamide and 1.2g of 2-hydroxypropanetricarboxylic acid, stirring and reacting for 2h at 65 ℃, and vacuum drying for 1h at 45 ℃ to obtain the antibacterial agent.
The preparation method of the substance A comprises the following steps: 15g of cyclohexyl methyl propionate, 12g of hydroxyethyl acrylate and 0.5g of p-toluenesulfonic acid are subjected to transesterification reaction at 90 ℃ for 1h, 1.3g of 2-hydroxyethylamine, 1.4g of acrylamide and 1.3g of 3-aminopropyl trihydroxysilane are added, 1h is carried out at 80 ℃, 1g of benzyl chloride (benzyl chloride) and 1.2g of trimethylolpropane are added, the reaction is carried out at 60 ℃ for 1h, and drying is carried out at 40 ℃ to obtain a substance A.
Example 2
The preparation method of the moisture-absorbing, breathable and antibacterial spunlace non-woven fabric for the polyurethane synthetic leather is characterized by comprising the following steps of:
(1) preparation of modified coconut husk product: 44.5g of modified coconut coir crushed to 1-2mm is added into 32g of diethyl aluminum hypophosphite and 3.1g of diethylene triamine pentaacetic acid, 180ml of water is added, the mixture is stirred and reacted for 2 hours at the temperature of 95 ℃, 0.7g of potassium hydrogen tartrate and 2.6g of diethylene triamine pentaacetic acid are added, the mixture is reacted for 2 hours at the temperature of 60 ℃, 0.5g of 4-acetoxystyrene and 6.2g of tetraalkylammonium fluoride are added, the mixture is reacted for 3 hours at the temperature of 70 ℃, the mixture is kept stand for 0.6 hour, and the mixture is dried for 2 hours at the temperature of 105 ℃, so that a modified coconut coir product is obtained.
(2) Preparing modified cotton textile fibers: soaking 44.7g of pure cotton spunlace nonwoven fabric in 70g of formic acid aqueous solution with the mass fraction of 5%, soaking at 60 ℃ for 90min, taking out cotton textile fibers, putting the cotton textile fibers into 60g of acetic acid aqueous solution with the mass concentration of 15%, taking out after 150min, washing for 5 times by using 100ml of mixed solution of ethanol and water with the volume ratio of 70:30, and drying;
(3) preparing a moisture-absorbing and air-permeable spunlace material: dispersing 0.8g of sodium alginate, 0.7g of chitosan and 0.6g of peregal O into 160g of distilled water, mixing and stirring for 50min at 60 ℃, adding 1.6g of the modified cotton textile fiber and the antibacterial agent obtained in the step (2), soaking for 90min, taking out, then soaking in 7g of 3-hydroxyphenylacetic acid and 80g of trifluoroacetic anhydride for 3.5h, drying for 40min at 100 ℃, washing for 5 times and drying;
(4) preparing the water-punched non-woven fabric for the moisture-absorbing, breathable and antibacterial polyurethane synthetic leather: and (2) uniformly scattering 15g of the modified coconut coir product obtained in the step (1), 0.05g of carboxylated graphene sheet, 11.6g of polyurethane adhesive and 2.1g of substance A on the surface of the moisture-absorbing and air-permeable spunlace woven material obtained in the step (3), folding the obtained moisture-absorbing and air-permeable spunlace woven material in half, flattening, and placing the folded material in a 50 ℃ oven for heat preservation and reaction for 4 hours to obtain the moisture-absorbing, air-permeable and antibacterial spunlace non-woven fabric for polyurethane synthetic leather.
Carboxylated graphene sheets: adding 0.012g of graphene sheet into 400mL of concentrated sulfuric acid, 0.3g of 4-triphenylamine borate and 0.3g of 3,4, 5-trifluorobenzene boric acid, mixing, reacting at 80 ℃, condensing and refluxing for 2h in an ultrasonic cleaner with the ultrasonic power of 500W and the ultrasonic frequency of 100KHz, diluting with 450mL of deionized water after ultrasonic treatment, then performing suction filtration by using a microporous filter membrane with the diameter of 0.2 mu m, repeatedly washing the deionized water until the deionized water is neutral, finally drying for 8h at 80 ℃, and grinding the mixture to fine powder to obtain a carboxylated graphene sheet, wherein the graphene is a graphene sheet produced by a chemical vapor deposition method;
preparation of polyurethane adhesive: the invention patent 201510974180.8 discloses a preparation method of a transparent matte waterborne polyurethane emulsion and a preparation method of an embodiment I of the transparent matte waterborne polyurethane emulsion prepared by the method.
The preparation method of the antibacterial agent comprises the following steps: adding 10g of 5-hydroxytryptophan, 4g of homatropine hydrobromide and 3g of 2-bromo-2-nitro-1, 3-propanol into a three-neck flask, stirring and reacting for 2h at 60 ℃, adding 3g of 1,2,3, 6-tetrahydro-2, 6-dioxopyrimidine-4-carboxylic acid, stirring and reacting for 3h at 70 ℃, adding 2g of 2, 3-pyrazinedicarboxylic acid, 2g of aluminum sulfate, 30g of water, 3g of lithium diisopropylamide and 1.2g of 2-hydroxypropanetricarboxylic acid, stirring and reacting for 3h at 65 ℃, and vacuum drying for 1h at 45 ℃ to obtain the antibacterial agent.
The preparation method of the substance A comprises the following steps: 15g of cyclohexyl methyl propionate, 12g of hydroxyethyl acrylate and 0.5g of p-toluenesulfonic acid are subjected to transesterification reaction at 120 ℃ for 2h, then 1.3g of 2-hydroxyethylamine, 1.4g of acrylamide and 1.3g of 3-aminopropyl trihydroxysilane are added, reaction is carried out at 110 ℃ for 2h, 2g of benzyl chloride (benzyl chloride) and 1.6g of trimethylolpropane are added, drying is carried out at 70 ℃ for 2h, and drying is carried out at 40 ℃ to obtain a substance A.
Example 3
The preparation method of the moisture-absorbing, breathable and antibacterial spunlace non-woven fabric for the polyurethane synthetic leather is characterized by comprising the following steps of:
(1) preparation of modified coconut husk product: 44.5g of modified coconut coir crushed to 1-2mm is added into 32g of diethyl aluminum hypophosphite and 3.1g of diethylene triamine pentaacetic acid, 180ml of water is added, the mixture is stirred and reacted for 2 hours at the temperature of 95 ℃, 0.7g of potassium hydrogen tartrate and 2.6g of diethylene triamine pentaacetic acid are added, the mixture is reacted for 2 hours at the temperature of 60 ℃, 0.5g of 4-acetoxystyrene and 6.2g of tetraalkylammonium fluoride are added, the mixture is reacted for 3 hours at the temperature of 70 ℃, the mixture is kept stand for 0.6 hour, and the mixture is dried for 2 hours at the temperature of 105 ℃, so that a modified coconut coir product is obtained.
(2) Preparing modified cotton textile fibers: soaking 44.7g of pure cotton spunlace nonwoven fabric in 70g of formic acid aqueous solution with the mass fraction of 5%, soaking at 60 ℃ for 90min, taking out cotton textile fibers, putting the cotton textile fibers into 60g of acetic acid aqueous solution with the mass concentration of 15%, taking out after 150min, washing for 5 times by using 100ml of mixed solution of ethanol and water with the volume ratio of 70:30, and drying;
(3) preparing a moisture-absorbing and air-permeable spunlace material: dispersing 0.8g of sodium alginate, 0.7g of chitosan and 0.6g of sodium carboxymethylcellulose into 160g of distilled water, mixing and stirring for 50min at 60 ℃, adding 1.6g of the modified cotton textile fiber and the antibacterial agent obtained in the step (2), soaking for 90min, taking out, reacting for 3.5h in 7g of trimethylhydroxyethyl propylene diamine and 80g of trifluoroacetic anhydride, drying for 20min at 100 ℃, washing for 4 times and drying;
(4) preparing the water-punched non-woven fabric for the moisture-absorbing, breathable and antibacterial polyurethane synthetic leather: and (2) uniformly scattering 15g of the modified coconut coir product obtained in the step (1), 0.05g of carboxylated graphene sheet, 11.6g of polyurethane adhesive and 2.1g of substance A on the surface of the moisture-absorbing and air-permeable spunlace woven material obtained in the step (3), folding the obtained moisture-absorbing and air-permeable spunlace woven material in half, flattening, and placing the folded material in a 50 ℃ oven for heat preservation and reaction for 3 hours to obtain the moisture-absorbing, air-permeable and antibacterial spunlace non-woven fabric for polyurethane synthetic leather.
Carboxylated graphene sheets: adding 0.012g of graphene sheet into 400mL of concentrated sulfuric acid, 0.3g of 4-triphenylamine borate and 0.3g of 3,4, 5-trifluorobenzene boric acid, mixing, reacting at 80 ℃, condensing and refluxing for 2h in an ultrasonic cleaner with the ultrasonic power of 500W and the ultrasonic frequency of 100KHz, diluting with 450mL of deionized water after ultrasonic treatment, then performing suction filtration by using a microporous filter membrane with the diameter of 0.2 mu m, repeatedly washing the deionized water until the deionized water is neutral, finally drying for 8h at 80 ℃, and grinding the mixture to fine powder to obtain a carboxylated graphene sheet, wherein the graphene is a graphene sheet produced by a chemical vapor deposition method;
preparation of polyurethane adhesive: the invention patent 201510974180.8 discloses a preparation method of a transparent matte waterborne polyurethane emulsion and a preparation method of an embodiment I of the transparent matte waterborne polyurethane emulsion prepared by the method.
The preparation method of the antibacterial agent comprises the following steps: 10g of 5-hydroxytryptophan, 3.5g of homatropine hydrobromide and 2.5g of 2-bromo-2-nitro-1, 3-propanol are added into a three-neck flask, stirred and reacted for 1.5h at 60 ℃, then 2g of 1,2,3, 6-tetrahydro-2, 6-dioxopyrimidine-4-carboxylic acid is added, stirred and reacted for 2h at 70 ℃, then 1.5g of 2, 3-pyrazine dicarboxylic acid, 1.5g of aluminum sulfate, 22g of water, 2.5g of lithium diisopropylamide and 1.2g of 2-hydroxypropanetricarboxylic acid are added, stirred and reacted for 2h at 65 ℃, and dried for 1h in vacuum at 45 ℃ to obtain the antibacterial agent.
The preparation method of the substance A comprises the following steps: 15g of cyclohexyl methyl propionate, 12g of hydroxyethyl acrylate and 0.5g of p-toluenesulfonic acid are subjected to ester exchange reaction at 110 ℃ for 1h, 1.3g of 2-hydroxyethylamine, 1.4g of acrylamide and 1.3g of 3-aminopropyl trihydroxysilane are added, 1h is carried out at 80 ℃, 1g of benzyl chloride (benzyl chloride) and 1.2g of trimethylolpropane are added, 1h is carried out at 60 ℃, and drying is carried out at 40 ℃ to obtain a substance A.
Example 4
The preparation method of the moisture-absorbing, breathable and antibacterial spunlace non-woven fabric for the polyurethane synthetic leather is characterized by comprising the following steps of:
(1) preparation of modified coconut husk product: 44.5g of modified coconut coir crushed to 1-2mm is added into 32g of diethyl aluminum hypophosphite and 3.1g of diethylene triamine pentaacetic acid, 180ml of water is added, the mixture is stirred and reacted for 1.5h at the temperature of 95 ℃, 0.7g of potassium hydrogen tartrate and 2.6g of diethylene triamine pentaacetic acid are added, the mixture is reacted for 2h at the temperature of 60 ℃, 0.5g of 4-acetoxystyrene and 6.2g of tetraalkyl ammonium fluoride are added, the mixture is reacted for 2h at the temperature of 70 ℃, the mixture is kept stand for 0.6h, and the mixture is dried for 2h at the temperature of 105 ℃ to obtain a modified coconut coir product.
(2) Preparing modified cotton textile fibers: soaking 44.7g of pure cotton spunlace nonwoven fabric in 70g of formic acid aqueous solution with the mass fraction of 5%, soaking for 60min at 40 ℃, taking out cotton textile fibers, putting the cotton textile fibers into 60g of acetic acid aqueous solution with the mass concentration of 15%, taking out after 90min, washing for 4 times by using 100ml of mixed solution of ethanol and water with the volume ratio of 70:30, and drying;
(3) preparing a moisture-absorbing and air-permeable spunlace material: dispersing 0.8g of sodium alginate, 0.7g of chitosan and 0.6g of diacetyl tartaric acid monoglyceride DATEM0 into 160g of distilled water, mixing and stirring for 50min at 60 ℃, adding 1.6g of modified cotton textile fiber and antibacterial agent obtained in the step (2), soaking for 60min, taking out, then reacting for 2h in water impregnated with 7g of hydroxyethyl acrylamide and 80g of trifluoroacetic anhydride, drying for 30min at 100 ℃, washing for 4 times and drying;
(4) preparing the water-punched non-woven fabric for the moisture-absorbing, breathable and antibacterial polyurethane synthetic leather: and (2) uniformly scattering 15g of the modified coconut coir product obtained in the step (1), 0.05g of carboxylated graphene sheet, 11.6g of polyurethane adhesive and 2.1g of substance A on the surface of the moisture-absorbing and air-permeable spunlace woven material obtained in the step (3), folding the obtained moisture-absorbing and air-permeable spunlace woven material in half, flattening, and placing the folded material in a 50 ℃ oven for heat preservation and reaction for 3 hours to obtain the moisture-absorbing, air-permeable and antibacterial spunlace non-woven fabric for polyurethane synthetic leather.
Carboxylated graphene sheets: adding 0.012g of graphene sheet into 400mL of concentrated sulfuric acid, 0.3g of 4-triphenylamine borate and 0.3g of 3,4, 5-trifluorobenzene boric acid, mixing, reacting at 80 ℃, condensing and refluxing for 2h in an ultrasonic cleaner with the ultrasonic power of 500W and the ultrasonic frequency of 100KHz, diluting with 450mL of deionized water after ultrasonic treatment, then performing suction filtration by using a microporous filter membrane with the diameter of 0.2 mu m, repeatedly washing the deionized water until the deionized water is neutral, finally drying for 8h at 80 ℃, and grinding the mixture to fine powder to obtain a carboxylated graphene sheet, wherein the graphene is a graphene sheet produced by a chemical vapor deposition method;
preparation of polyurethane adhesive: the invention patent 201510974180.8 discloses a preparation method of a transparent matte waterborne polyurethane emulsion and a preparation method of an embodiment I of the transparent matte waterborne polyurethane emulsion prepared by the method.
The preparation method of the antibacterial agent comprises the following steps: 10g of 5-hydroxytryptophan, 3.5g of homatropine hydrobromide and 2.5g of 2-bromo-2-nitro-1, 3-propanol are added into a three-neck flask, stirred and reacted for 1.5h at 60 ℃, then 2g of 1,2,3, 6-tetrahydro-2, 6-dioxopyrimidine-4-carboxylic acid is added, stirred and reacted for 2h at 70 ℃, then 1.5g of 2, 3-pyrazine dicarboxylic acid, 1.5g of aluminum sulfate, 22.5g of water, 2.5g of lithium diisopropylamide and 1.2g of 2-hydroxypropanetricarboxylic acid are added, stirred and reacted for 2.5h at 65 ℃, and vacuum dried for 1h at 45 ℃ to obtain the antibacterial agent.
The preparation method of the substance A comprises the following steps: 15g of cyclohexyl methyl propionate, 12g of hydroxyethyl acrylate and 0.5g of p-toluenesulfonic acid are subjected to transesterification reaction at 105 ℃ for 1.5h, then 1.3g of 2-hydroxyethylamine, 1.4g of acrylamide and 1.3g of 3-aminopropyl trihydroxysilane are added, and the mixture is dried at 95 ℃ for 1.5h, then 1.5g of benzyl chloride and 1.4g of trimethylolpropane are added, and the mixture is dried at 65 ℃ for 1.5h and 40 ℃ to obtain a substance A.
Example 5
The preparation method of the moisture-absorbing, breathable and antibacterial spunlace non-woven fabric for the polyurethane synthetic leather is characterized by comprising the following steps of:
(1) preparation of modified coconut husk product: 44.5g of modified coconut coir crushed to 1-2mm is added into 32g of diethyl aluminum hypophosphite and 3.1g of diethylene triamine pentaacetic acid, 180ml of water is added, the mixture is stirred and reacted for 1.5h at the temperature of 95 ℃, 0.7g of potassium hydrogen tartrate and 2.6g of diethylene triamine pentaacetic acid are added, the mixture is reacted for 2h at the temperature of 60 ℃, 0.5g of 4-acetoxystyrene and 6.2g of tetraalkyl ammonium fluoride are added, the mixture is reacted for 1h at the temperature of 70 ℃, the mixture is kept stand for 0.6h, and the mixture is dried for 2h at the temperature of 105 ℃ to obtain a modified coconut coir product.
(2) Preparing modified cotton textile fibers: soaking 44.7g of pure cotton spunlace nonwoven fabric in 70g of formic acid aqueous solution with the mass fraction of 5%, soaking at 60 ℃ for 70min, taking out cotton textile fibers, putting the cotton textile fibers into 60g of acetic acid aqueous solution with the mass concentration of 15%, taking out after 70min, washing for 4 times by using 100ml of mixed solution of ethanol and water with the volume ratio of 70:30, and drying;
(3) preparing a moisture-absorbing and air-permeable spunlace material: dispersing 0.8g of sodium alginate, 0.7g of chitosan and 0.6g of sodium carboxymethylcellulose into 160g of distilled water, mixing and stirring for 50min at 60 ℃, adding 1.6g of the modified cotton textile fiber and the antibacterial agent obtained in the step (2), soaking for 40min, taking out, then soaking in 7g of 3, 4-dihydroxy phenylacetic acid and 80g of trifluoroacetic anhydride for 1h, drying for 20min at 100 ℃, washing for 4 times and drying;
(4) preparing the water-punched non-woven fabric for the moisture-absorbing, breathable and antibacterial polyurethane synthetic leather: and (2) uniformly scattering 15g of the modified coconut coir product obtained in the step (1), 0.05g of carboxylated graphene sheet, 11.6g of polyurethane adhesive and 2.1g of substance A on the surface of the moisture-absorbing and air-permeable spunlace woven material obtained in the step (3), folding the obtained moisture-absorbing and air-permeable spunlace woven material in half, flattening, and placing the folded material in a 50 ℃ oven for heat preservation and reaction for 2h to obtain the moisture-absorbing, air-permeable and antibacterial spunlace non-woven fabric for polyurethane synthetic leather.
Carboxylated graphene sheets: adding 0.012g of graphene sheet into 400mL of concentrated sulfuric acid, 0.3g of 4-triphenylamine borate and 0.3g of 3,4, 5-trifluorobenzene boric acid, mixing, reacting at 80 ℃, condensing and refluxing for 2h in an ultrasonic cleaner with the ultrasonic power of 500W and the ultrasonic frequency of 100KHz, diluting with 450mL of deionized water after ultrasonic treatment, then performing suction filtration by using a microporous filter membrane with the diameter of 0.2 mu m, repeatedly washing the deionized water until the deionized water is neutral, finally drying for 8h at 80 ℃, and grinding the mixture to fine powder to obtain a carboxylated graphene sheet, wherein the graphene is a graphene sheet produced by a chemical vapor deposition method;
preparation of polyurethane adhesive: the invention patent 201510974180.8 discloses a preparation method of a transparent matte waterborne polyurethane emulsion and a preparation method of an embodiment I of the transparent matte waterborne polyurethane emulsion prepared by the method.
The preparation method of the antibacterial agent comprises the following steps: adding 10g of 5-hydroxytryptophan, 3g of homatropine hydrobromide and 3g of 2-bromo-2-nitro-1, 3-propanol into a three-neck flask, stirring and reacting at 60 ℃ for 2h, then adding 3g of 1,2,3, 6-tetrahydro-2, 6-dioxopyrimidine-4-carboxylic acid, stirring and reacting at 70 ℃ for 3h, then adding 2g of 2, 3-pyrazinedicarboxylic acid, 2g of aluminum sulfate, 15g of water, 2g of lithium diisopropylamide and 1.2g of 2-hydroxypropanetricarboxylic acid, stirring and reacting at 65 ℃ for 3h, and vacuum drying at 45 ℃ for 1h to obtain the antibacterial agent.
The preparation method of the substance A comprises the following steps: 15g of cyclohexyl methyl propionate, 12g of hydroxyethyl acrylate and 0.5g of p-toluenesulfonic acid are subjected to transesterification reaction at 90 ℃ for 1.5h, then 1.3g of 2-hydroxyethylamine, 1.4g of acrylamide and 1.3g of 3-aminopropyl trihydroxysilane are added, the reaction solution is dried at 110 ℃ for 1.5h, 1.2g of benzyl chloride (benzyl chloride) and 1.3g of trimethylolpropane are added, the reaction solution is dried at 65 ℃ for 2h, and the dried product is dried at 40 ℃ to obtain a substance A.
Liquid absorption rate the amount of liquid absorbed for 1 hour was measured by sieve method (refer to the article "study on liquid absorption rate of super absorbent resin and its measurement method" issued by Shunhun in polymer science and engineering), air permeability was determined by national standard GB/T5453-1997 determination of air permeability of woven fabric, each sample was measured 5 times, and the average value was taken;
TABLE 1 test data of moisture-absorbing, air-permeable, antibacterial spunlace nonwoven fabric for polyurethane synthetic leather
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Air permeability (mm/s) | 441 | 439 | 426 | 411 | 401 |
| Imbibition rate/%) | 603 | 612 | 623 | 615 | 606 |
| E.coli/%) | 1.7 | 2.4 | 2.6 | 7.9 | 4.6 |
| Aspergillus niger/% | 6.4 | 4.7 | 6.4 | 4.9 | 5.5 |
| Breaking strength/MPa | 24.4 | 31.4 | 26.7 | 28.9 | 27.8 |
| Elongation at break/% | 317 | 356 | 368 | 358 | 378 |
As can be seen from Table 1, the modified material of the present invention has high air permeability and liquid absorption rate, which shows that the modified material of the present invention can significantly improve the air permeability and liquid absorption rate of the material.
TABLE 2 test data (modified coconut coir product, no 4-acetoxystyrene or tetraalkylammonium fluoride)
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Liquid absorption/% without 4-acetoxystyrene | 322 | 366 | 355 | 378 | 361 |
| Liquid absorption/% without tetraalkylammonium fluoride | 321 | 323 | 333 | 318 | 317 |
As can be seen from Table 2, the addition of the coconut coir product, without the addition of 4-acetoxystyrene or tetraalkylammonium fluoride, was found to assist the coconut coir product in increasing the wet pick-up of the cotton.
TABLE 3 test data for moisture-absorbing, air-permeable, antibacterial polyurethane synthetic leather spunlace nonwoven fabric (without trifluoroacetic anhydride)
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example | |
| Escherichia coli/% (on the day) | 13.2 | 13.6 | 12.3 | 15.7 | 14.9 | 36.9 |
| Aspergillus niger/% (on the day) | 18.9 | 13.5 | 13.4 | 16.2 | 15.8 | 36.6 |
| Escherichia coli/% (180 days) | 17.2 | 16.2 | 15.3 | 16.9 | 18.6 | 64.5 |
| Aspergillus niger/% (180 days) | 17.6 | 18.9 | 18.6 | 17.8 | 21.2 | 63.6 |
Comparative example using example 1 (the same applies below) of 201711233692.4, the antibacterial effect was reduced without the addition of trifluoroacetic anhydride, and the antibacterial effect was sustained with trifluoroacetic anhydride.
TABLE 4 test data of the water-punched non-woven fabrics for moisture-absorbing, air-permeable, antibacterial polyurethane synthetic leather (without 2-hydroxypropanetricarboxylic acid added)
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example | |
| E.coli/%) | 16.5 | 17.4 | 16.8 | 15.9 | 14.6 | 36.9 |
| Aspergillus niger/% | 21.9 | 22.2 | 23.5 | 24.6 | 27.8 | 36.6 |
The antibacterial effect without the addition of 2-hydroxypropanetricarboxylic acid was reduced (example 1, E.coli 48.9, Aspergillus niger 55.6;).
TABLE 5 test data for moisture-absorbing, air-permeable, antibacterial polyurethane synthetic leather spunlace nonwoven fabrics (without lithium diisopropylamide)
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example | |
| E.coli/%) | 13.5 | 18.6 | 19.7 | 18.4 | 17.7 | 36.9 |
| Aspergillus niger/% | 24.5 | 25.2 | 24.7 | 28.7 | 28.4 | 36.6 |
The antibacterial effect without lithium diisopropylamide is decreased.
TABLE 6 test data for moisture-absorbing, air-permeable, antibacterial polyurethane synthetic leather spunlace nonwoven fabrics (without addition of substance A)
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Air permeability (mm/s) | 288 | 299 | 259 | 278 | 285 |
| Imbibition rate/%) | 305 | 306 | 356 | 388 | 377 |
The material A is not added, so that the dispersibility of the polyurethane adhesive is improved.
TABLE 7 test data for moisture-absorbing, air-permeable, antibacterial polyurethane synthetic leather spunlace nonwoven fabrics (with substance A, no benzyl chloride added)
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Air permeability (mm/s) | 312 | 345 | 299 | 322 | 307 |
The dispersibility of the polyurethane adhesive is improved by adding the substance A, and the air permeability of the spunlace non-woven fabric for the polyurethane synthetic leather is greatly influenced by adding the benzyl chloride, so that the air permeability is reduced.
Claims (4)
1. The preparation method of the moisture-absorbing, breathable and antibacterial spunlace non-woven fabric for the polyurethane synthetic leather is characterized by comprising the following steps of:
(1) preparation of modified coconut husk product: adding 44.5g of modified coconut coir crushed to 1-2mm into 32g of diethyl aluminum hypophosphite and 3.1g of diethylene triamine pentaacetic acid, adding 180ml of water, stirring and reacting at 95 ℃ for 1-2 h, adding 0.7g of potassium hydrogen tartrate and 2.6g of diethylene triamine pentaacetic acid, reacting at 60 ℃ for 2h, adding 0.5g of 4-acetoxystyrene and 6.2g of tetraalkylammonium fluoride, reacting at 70 ℃ for 1-3 h, standing for 0.6h, and drying at 105 ℃ for 2h to obtain a modified coconut coir product;
(2) preparing the modified cotton non-woven fabric: soaking 44.7g of pure cotton spunlace non-woven fabric in 70g of 5% formic acid aqueous solution by mass fraction at 25-60 ℃ for 30-90 min, taking out the cotton non-woven fabric, putting the cotton non-woven fabric into 60g of acetic acid aqueous solution with the mass concentration of 15%, taking out the cotton non-woven fabric for 30-150 min, washing the cotton non-woven fabric for 3-5 times by using 100ml of mixed solution of ethanol and water with the volume ratio of 70:30, and drying the cotton non-woven fabric;
(3) preparing the moisture-absorbing and breathable spunlace non-woven fabric: dispersing 0.8g of sodium alginate, 0.7g of chitosan and 0.6g of emulsifier into 160g of distilled water, mixing and stirring for 50min at 60 ℃, adding 1.6g of the modified cotton non-woven fabric and the antibacterial agent in the step (2), soaking for 30-90 min, taking out, soaking in 7g of the crosslinking agent and 80g of trifluoroacetic anhydride, reacting for 0.5-3.5 h, drying for 15-40 min at 100 ℃, washing for 3-5 times, and drying; the preparation method of the antibacterial agent comprises the steps of adding 10g of 5-hydroxytryptophan, 3-4 g of post-manitol hydrobromide and 2-bromo-2-nitro-1, 3-propanol into a three-neck flask, stirring and reacting for 1-2 hours at 60 ℃, adding 1-3 g of 1,2,3, 6-tetrahydro-2, 6-dioxopyrimidine-4-carboxylic acid, stirring and reacting for 1-3 hours at 70 ℃, adding 1-2 g of 2, 3-pyrazinedicarboxylic acid, 1-2 g of aluminum sulfate, 15-30 g of water, 2-3 g of lithium diisopropylamide and 1.2g of 2-hydroxypropanetricarboxylic acid, stirring and reacting for 2-3 hours at 65 ℃, and vacuum drying for 1 hour at 45 ℃ to obtain the antibacterial agent;
(4) preparing the water-punched non-woven fabric for the moisture-absorbing, breathable and antibacterial polyurethane synthetic leather: uniformly scattering 15g of the modified coconut coir product obtained in the step (1), 0.05g of carboxylated graphene sheet material, 11.6g of polyurethane adhesive and 2.1g of substance A on the surface of the moisture-absorbing and air-permeable spunlace non-woven fabric obtained in the step (3), folding the obtained moisture-absorbing and air-permeable spunlace non-woven fabric, flattening, and putting the obtained moisture-absorbing and air-permeable spunlace non-woven fabric into a 50 ℃ oven for heat preservation and reaction for 2-4 hours to obtain the moisture-absorbing, air-permeable and antibacterial spunlace non-woven fabric for polyurethane synthetic leather; the preparation method of the substance A comprises the following steps: performing ester exchange reaction on 15g of cyclohexyl methyl propionate, 12g of hydroxyethyl acrylate and 0.5g of p-toluenesulfonic acid at 90-120 ℃ for 1-2 h, adding 1.3g of 2-hydroxyethylamine, 1.4g of acrylamide and 1.3g of 3-aminopropyl trihydroxysilane, reacting at 80-110 ℃ for 1-2 h, adding 1-2 g of benzyl chloride and 1.2-1.6 g of trimethylolpropane, reacting at 60-70 ℃ for 1-2 h, and drying at 40 ℃ to obtain a substance A.
2. The method for preparing the moisture-absorbing, air-permeable and antibacterial spunlace nonwoven fabric for polyurethane synthetic leather according to claim 1, wherein the emulsifier is any one of sodium stearoyl lactylate, peregal O, sodium carboxymethyl cellulose and diacetyl tartaric acid monoglyceride DATEM.
3. The method for preparing the moisture-absorbing, air-permeable and antibacterial spunlace nonwoven fabric for polyurethane synthetic leather according to claim 1 comprises the following steps: the cross-linking agent is any one of 3, 4-dihydroxy phenylacetic acid, 3-hydroxy phenylacetic acid, trimethyl hydroxyethyl propane diamine and hydroxyethyl acrylamide.
4. The method for preparing the moisture-absorbing, air-permeable and antibacterial spunlace nonwoven fabric for polyurethane synthetic leather according to claim 1 comprises the following steps: carboxylated graphene sheets: adding 0.012g of graphene sheet into 400mL of concentrated sulfuric acid, 0.3g of 4-triphenylamine borate and 0.3g of 3,4, 5-trifluorobenzene boric acid, mixing, reacting at 80 ℃, condensing and refluxing for 2h in an ultrasonic cleaner with the ultrasonic power of 500W and the ultrasonic frequency of 100KHz, diluting with 450mL of deionized water after ultrasonic treatment, then performing suction filtration by using a microporous filter membrane with the diameter of 0.2 mu m, repeatedly washing with the deionized water until the deionized water is neutral, finally drying for 8h at 80 ℃, and grinding to fine powder to obtain the carboxylated graphene sheet, wherein the graphene is the graphene sheet produced by the chemical vapor deposition method.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810850750.6A CN108914564B (en) | 2018-07-29 | 2018-07-29 | Preparation method of moisture-absorbing, breathable and antibacterial spunlace non-woven fabric for polyurethane synthetic leather |
| CN202110062022.0A CN112553891B (en) | 2018-07-29 | 2018-07-29 | Preparation method of moisture-absorbing, breathable and antibacterial spunlace non-woven fabric for polyurethane synthetic leather |
| PCT/CN2018/120860 WO2020024517A1 (en) | 2018-07-29 | 2018-12-13 | Method for preparing moisture-retentive, breathable, and antibacterial spunlace non-woven fabric for polyurethane synthetic leather |
| CA3028474A CA3028474A1 (en) | 2018-07-29 | 2018-12-27 | Method for preparing water-spun non-woven fabric of hygroscopic, breathable and antibacterial polyurethane synthetic leather |
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| Publication number | Publication date |
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| CN112553891B (en) | 2022-12-09 |
| WO2020024517A1 (en) | 2020-02-06 |
| CN108914564A (en) | 2018-11-30 |
| CA3028474A1 (en) | 2020-01-29 |
| CN112553891A (en) | 2021-03-26 |
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