Antibacterial quilt core fabric and detachable multi-layer three-dimensional structure quilt core

Abstract

The application discloses an antibacterial quilt core fabric and a detachable multi-layer three-dimensional structure quilt core, belongs to the technical field of antibacterial material processing, and is used for solving the technical problems that the antibacterial durability, regenerability and soft skin-friendliness of the antibacterial quilt core fabric in the prior art need to be further improved, the quilt core is not suitable for actual life application scenes, and the quilt core is inconvenient to wash and protect and has defects such as the like, and the antibacterial quilt core fabric is prepared by oxidizing and activating a cotton-containing fabric to obtain a pretreated fabric, and then performing antibacterial finishing on the pretreated fabric by using an antibacterial finishing liquid. The application is characterized in that the cotton-containing fabric is oxidized and activated, and then the antibacterial finishing is performed by using an antibacterial finishing liquid containing quaternary ammonium salt and a silicon-based halogenamine precursor, so that the antibacterial property and softness of the antibacterial quilt core fabric are effectively improved, the antibacterial regenerability of the antibacterial quilt core fabric is also improved, and the detachable positioning design of the quilt core makes the quilt core more suitable for actual life application scenes.

Description

Technical Field

[0001] This invention relates to the field of antibacterial material processing technology, specifically to an antibacterial quilt cover fabric and a detachable multi-layer three-dimensional structure quilt cover. Background Technology

[0002] As a large household textile item that comes into long-term contact with the human body, comforters are constantly in a warm, humid microenvironment rich in sweat, dander, and sebum. This environment makes them highly susceptible to the growth of microorganisms such as Staphylococcus aureus, Escherichia coli, and Klebsiella pneumoniae. The growth of these microorganisms not only causes unpleasant odors and yellowing, but may also lead to skin irritation, respiratory discomfort, and shorten the lifespan of the filling fibers and fabric. Homes, hotels, nursing homes, and medical institutions typically control hygiene risks by increasing the frequency of washing, raising the washing temperature, or adding chlorine / oxygen bleach.

[0003] Currently, antibacterial comforter fabrics are mostly given antibacterial properties through finishing processes. However, some inorganic or small-molecule antibacterial agents in antibacterial finishing solutions rely on physical adsorption or ionic bond fixation, which are easily migrated and lost during use and washing, resulting in insufficient antibacterial durability. To improve the fixation amount, highly cross-linked or highly additive film-forming systems are often used, but these can easily increase the stiffness of the fabric and affect drape and skin-friendliness. In terms of comforter structure, conventional products often use grid quilting, box-type compartments, or dot-shaped shaping to inhibit the movement of the filling, making washing and care more difficult. Currently, multi-layer comforters that can be spliced ​​or stacked have emerged, but multi-layer solutions are still limited to the outer cover or two comforters sewn together by buttons / zippers. The relative slippage, wrinkling, and stacking between layers during use and washing are still quite prominent.

[0004] To address this technical deficiency, a solution is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an antibacterial comforter fabric and a detachable multi-layer three-dimensional structure comforter, which solves the technical problems in the prior art where the antibacterial durability, regenerability and softness of the antibacterial comforter fabric need to be further improved, and the comforter is not suitable for actual life application scenarios and has inconvenient washing and care.

[0006] The objective of this invention can be achieved through the following technical solution: an antibacterial comforter fabric, wherein the antibacterial comforter fabric is obtained by oxidizing and activating cotton-containing fabric to prepare a pre-treated fabric, and then performing an antibacterial finishing on the pre-treated fabric with an antibacterial finishing solution;

[0007] The antibacterial finishing solution comprises the following components by weight: 10-20 parts of polydimethyldiallylammonium chloride, 10-15 parts of a silane-based haloamine precursor, 2-3 parts of an initiator, and 100 parts of a solvent.

[0008] Furthermore, the solvent is composed of N,N-dimethylformamide and deionized water in a volume ratio of 2:5; the initiator is persulfate.

[0009] Furthermore, the preparation method of the silicon-based haloamine precursor is as follows: octamethylcyclotetrasiloxane, 3-aminopropylmethylsilane and catalyst are mixed, the temperature of the reaction system is raised to 85-95℃, and the reaction is maintained at this temperature for 80-100 min. Diallyltetramethyldisiloxane is added to the reaction system, and the reaction is maintained at this temperature for 2-3 h. After post-treatment, the silicon-based haloamine precursor is obtained.

[0010] The synthesis reaction formula for the silicon-based haloamine precursor is as follows:

[0011]

[0012] Furthermore, the ratio of octamethylcyclotetrasiloxane, 3-aminopropylmethylsilane, catalyst, and diallyltetramethyldisiloxane is 10g:2.6-3.0g:2mL:2g, the catalyst is 75-85wt% sulfuric acid, and the post-treatment includes: after the reaction is complete, the reaction system temperature is lowered to room temperature, 5wt% sodium bicarbonate solution is added to the reaction system to adjust the pH of the system to 7, the reaction system temperature is raised to 85-95℃, the reaction system is evaporated under negative pressure to -0.1MPa, and low-boiling substances are removed by vacuum distillation to obtain the silane-based haloamine precursor.

[0013] Furthermore, the pre-treated fabric is obtained by the following steps:

[0014] A1. Mix persulfate and deionized water and stir until dissolved. Add sodium hydroxide solution to the reaction system and adjust the pH of the system to 5-6 to obtain the activated solution.

[0015] A2. Place the cotton-containing fabric in an activation solution at a temperature of 40-50℃, keep it warm and sonicate for 30-40 minutes, and then perform post-treatment to obtain the activated cotton-containing fabric.

[0016] A3. Mix propylene 3-isocyanate and N,N-dimethylformamide, add activated cotton fabric to the reaction system, and sonicate at room temperature for 40-60 minutes. Then perform post-treatment to obtain the pre-treated fabric.

[0017] Furthermore, in step A1, the ratio of persulfate to deionized water is 3-5 g: 100 mL, and the concentration of the sodium hydroxide solution is 2-3 mol / L.

[0018] Furthermore, in step A2, the solid-liquid ratio of the cotton-containing fabric and the activation solution is 1:10-15. The post-treatment includes: after the reaction is complete, the fabric is taken out and drained, washed with purified water 3-5 times, and then placed in a drying oven at a temperature of 40-50℃ and dried to constant weight to obtain activated cotton-containing fabric.

[0019] Further, in step A3, the ratio of propylene 3-isocyanate, N,N-dimethylformamide and activated cotton fabric is 0.5g:20mL:3-5g. The post-treatment includes: after the reaction is complete, the fabric is taken out and drained, washed with purified water 3-5 times, and then placed in a drying oven at a temperature of 40-50℃ and dried to constant weight to obtain the pretreated fabric.

[0020] Furthermore, the antibacterial finishing process includes the following steps:

[0021] B1. Mix polydimethyldiallylammonium chloride, silane-based haloamine precursor, initiator and solvent to obtain antibacterial finishing solution. Place the pretreated fabric in the antibacterial finishing solution and perform two dips and two nips to obtain padded fabric.

[0022] B2. Place the impregnated fabric in a curing chamber at a temperature of 80-90℃ and a humidity of 80-90% for 90-120 minutes for heat and moisture treatment, followed by post-treatment to obtain the precursor of the antibacterial quilt core fabric.

[0023] B3. Place the antibacterial quilt core fabric precursor in a sodium hypochlorite solution at a temperature of 40-50℃ and soak for 30-50 minutes. Then perform post-treatment to obtain the antibacterial quilt core fabric.

[0024] Furthermore, in step B1, during the two-dip and two-roll process, in the first dip rolling, the rolling pressure is 1.5-2.5 bar, the rolling time is 2-3 min, and the roll residue is 60-70%; in the second dip rolling, the rolling pressure is 2-3 bar, the rolling time is 3-4 min, and the roll residue is 70-80%.

[0025] Furthermore, in step B2, the post-processing includes: after the reaction is complete, taking the fabric out of the curing box, washing it 3-5 times with purified water, and air-drying it to obtain the antibacterial quilt core fabric precursor.

[0026] Furthermore, in step B3, the solid-liquid ratio of the antibacterial quilt core fabric precursor and the sodium hypochlorite solution is 1:15-20, the concentration of the sodium hypochlorite solution is 0.1-0.3wt%, and the pH is 5-6. The post-treatment includes: after the reaction is complete, taking the fabric out of the curing box, washing it 2-3 times with purified water, and air-drying it to obtain the antibacterial quilt core fabric.

[0027] The present invention also proposes a detachable multi-layer three-dimensional quilt core, comprising at least two or more functional layers and an antibacterial quilt core fabric covering the functional layers. The functional layers are stacked and combined, and a detachable connection structure is provided between the functional layers and the antibacterial quilt core fabric to achieve the positioning and fixation of the layers.

[0028] Furthermore, the detachable connection structure is one or more combinations of zippers, Velcro, buttons, and snap fasteners.

[0029] The present invention has the following beneficial effects:

[0030] 1. The antibacterial comforter fabric of the present invention, by activating the cotton-containing fabric with persulfate and then grafting it with propylene isocyanate, forms abundant active sites and alkenyl structures on the fiber surface, providing a strong chemical anchoring point for the subsequent binding of siloxane halide precursors and quaternary ammonium salt molecules; the subsequently formed siloxane crosslinking network can construct a dense and flexible three-dimensional structure on the fiber surface, so that the halide halide groups and quaternary ammonium salt bactericidal structures are chemically bonded and fixed on the fiber at multiple points, avoiding the rapid loss of traditional physical adsorption finishing during washing. It constructs multiple chemical fixation mechanisms on the cotton-containing fabric, so that the antibacterial finishing agent is stably attached to the fiber surface, thereby significantly improving antibacterial performance and wash resistance.

[0031] 2. The antibacterial quilt core fabric of the present invention achieves synergistic fixation of quaternary ammonium salt and haloamine through a siloxane network. The quaternary ammonium salt adsorbs and destroys cell membranes through permanent positive charge, forming a stable contact bactericidal system. The haloamine structure has strong oxidizing properties, which can quickly destroy cell wall proteins and inhibit bacterial metabolism. The two bactericidal structures support each other in space and coexist stably under chemical bonding, thereby achieving efficient, broad-spectrum and dual-pathway antibacterial ability. Polydimethyldiallyl ammonium chloride, as a high molecular weight quaternary ammonium salt with permanent positive charge, has strong hydrophilicity and film-forming ability. When it is fixed on the fabric surface as an antibacterial finishing agent, it forms a relatively uniform thin layer on the fiber surface. This, combined with the good flexibility of the siloxane segments in the haloamine precursor, improves the elasticity and softness of the fabric.

[0032] 3. In the antibacterial comforter fabric of the present invention, the halogenated amine structure is gradually consumed during washing, but it is stably covalently bonded to the fiber through a siloxane network, so that it retains the halogenated amine skeleton after deactivation and will not be washed away completely during washing. The amino group is reactivated into a halogenated amine structure by low-concentration sodium hypochlorite, so that the deactivated halogenated amine layer regains its oxidative bactericidal ability. This regeneration process does not change the fixed structural network, nor does it destroy the quaternary ammonium salt contact bactericidal system. Without reducing the mechanical properties and comfort of the material, the antibacterial performance is restored to near the initial level, realizing the regenerability of antibacterial performance, thereby significantly extending the service life of the material.

[0033] 4. The detachable multi-layer three-dimensional structure of the quilt core of the present invention allows each functional layer to be individually removed, washed, and regenerated with low chlorine during use and washing, reducing the frequency of inner layer washing, delaying material fatigue, and maintaining overall hygiene. The stable and non-shifting interlayer interface ensures continuous coverage between the antibacterial cover layer and the human body contact surface, increasing the effective antibacterial area. The regenerable antibacterial fabric and the detachable maintenance path are matched to form an easy-to-remove, easy-to-wash, and easy-to-regenerate life cycle solution. The number of functional layers can be increased or decreased according to the temperature environment, making it more suitable for actual life application scenarios. Detailed Implementation

[0034] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In this invention, the effective component content of polydimethyldiallylammonium chloride is 99%, and it is selected from commercially available products from Jinan Yucai Chemical Co., Ltd.

[0036] Example 1

[0037] This embodiment provides a detachable multi-layer three-dimensional structure comforter core, including at least two or more functional layers and an antibacterial comforter core cover;

[0038] Several functional layers are stacked and combined, and Velcro is provided between the functional layers to position and fix the multiple functional layers;

[0039] The antibacterial comforter cover is formed by sewing two antibacterial comforter fabrics together. One side of the antibacterial comforter cover has a pre-set opening for the access of the functional layer. The opening is sealed by a zipper. The inner corner of the antibacterial comforter cover is connected to the functional layer by buttons for positioning and fixation.

[0040] Example 2

[0041] This embodiment provides a method for preparing an antibacterial comforter fabric, specifically including the following steps:

[0042] Step 1: Preparation of pre-treated fabric

[0043] Weigh out 30g of sodium persulfate and 1L of deionized water and add them to the reaction flask. Stir until dissolved. Add 2mol / L sodium hydroxide solution to the reaction flask and adjust the pH of the system to 5 to obtain the activated solution.

[0044] A cotton-containing fabric with a cotton content of 40wt% and an activation solution were mixed at a solid-liquid ratio of 1:10. The activation solution was heated to 40℃ and subjected to ultrasonic treatment for 30 minutes. The fabric was then taken out and drained. It was washed three times with purified water and then placed in a drying oven at 40℃ and dried to constant weight to obtain the activated cotton-containing fabric.

[0045] Weigh out 5g of propylene 3-isocyanate and 200mL of N,N-dimethylformamide and add them to a beaker. Mix them evenly. Then add 30g of activated cotton fabric to the beaker. Sonicate at room temperature for 40min. Then take out the fabric and drain it. Wash it three times with purified water. Then place it in a drying oven at 40℃ and dry it to constant weight to obtain the pretreated fabric.

[0046] In the reaction, sodium persulfate decomposes under heating to generate sulfate radicals, which mildly oxidize the surface of cotton fibers, forming oxygen-containing active groups on the fibers and increasing the surface negative charge density and wettability. Propylene 3-isocyanate undergoes ring-opening addition with the oxygen-containing active groups on the fibers to form urethane bonds, and then forms unsaturated olefin double bonds on the fibers, thus preparing the pretreated fabric. "Surface activation and covalent anchoring" significantly improves the dyeing / fixation efficiency of subsequent finishing agents and reduces washing migration. The introduced unsaturated olefin double bonds provide chemical bridges for subsequent free radical crosslinking and siloxane network grafting, improving the fabric's wash resistance. The presence of urethane bonds does not significantly increase stiffness, leaving room for a soft hand feel.

[0047] Step 2: Preparation of silicon-based haloamine precursor

[0048] Weigh out 10g of octamethylcyclotetrasiloxane, 2.6g of 3-aminopropylmethylsilane, and 2mL of 75wt% sulfuric acid and add them to a reaction flask. Stir the mixture and heat the flask to 85℃. Maintain the temperature for 80min. Add 2g of diallyltetramethyldisiloxane to the flask and maintain the temperature for 2h. Cool the flask to room temperature and add 5wt% sodium bicarbonate solution to adjust the pH of the system to 7. Increase the temperature of the flask to 85℃ and apply a negative pressure of -0.1MPa to the flask. Remove low-boiling substances by vacuum distillation to obtain the silane-based haloamine precursor.

[0049] In the reaction, under acid catalysis, octamethylcyclotetrasiloxane undergoes ring-opening to form a polysiloxane chain with silanol activity. The siloxane on the 3-aminopropylmethylsilane molecule hydrolyzes to form silanols, which then condense to form long polysiloxane segments containing amino groups. Diallyltetramethyldisiloxane acts as a capping agent, hydrolyzing under acid catalysis to form unsaturated olefin double bonds for capping, thus preparing a silane-based haloamine precursor. The amino groups introduced into the silane-based haloamine precursor molecule can react with sodium hypochlorite at a temperature... Under certain conditions, chlorination occurs to form haloamines. The amino content directly affects the haloamine content, thus affecting the antibacterial effect. The low glass transition temperature and low surface energy of the polysiloxane backbone of the silicon-based haloamine precursor make the resulting film flexible and friction-reducing, forming a "lubricating layer" between it and the fiber. At the same time, the polysiloxane backbone has good water vapor permeability, with less sacrifice of air permeability and bulkiness, making it more flexible. Allyl end-capping provides sites for free radical grafting / crosslinking in subsequent steps, improving the antibacterial durability of the material.

[0050] Step 3: Prepare the precursor for the antibacterial comforter fabric.

[0051] N,N-dimethylformamide and deionized water were mixed evenly at a volume ratio of 2:5 to obtain a solvent;

[0052] Weigh out the following parts by weight: 10 parts of polydimethyldiallylammonium chloride, 10 parts of silane-based haloamine precursor, 2 parts of potassium persulfate and 100 parts of solvent, mix them evenly to obtain an antibacterial finishing solution;

[0053] The pretreated fabric was placed in an antibacterial finishing solution and subjected to two dips and two nips. In the first nips, the nips were set to a pressure of 1.5 bar and a time of 2 min, with a nips rate of 60%. In the second nips, the nips were set to a pressure of 2 bar and a time of 3 min, with a nips rate of 70%, resulting in a nipsed fabric.

[0054] The impregnated fabric was placed in a curing chamber at 80°C and 80% humidity for 90 minutes. The fabric was then removed from the curing chamber, washed three times with purified water, and air-dried to obtain the precursor of the antibacterial quilt core fabric.

[0055] In the reaction, N,N-dimethylformamide and water are mixed to form a solvent, which reduces the surface tension of the system and improves the spreading and wetting of the fiber by polydimethyldiallylammonium chloride and silane-based haloamine precursors. Then, quantitative sizing is carried out by two dips and two treads with antibacterial finishing solution. Then, under high temperature and high humidity environment, potassium persulfate initiates free radical polymerization of unsaturated olefins to form a semi-interpenetrating cross-linked polymer network, which improves the wash resistance of the fabric material.

[0056] Step 4: Prepare antibacterial quilt core fabric

[0057] Sodium hypochlorite and deionized water were mixed, and sodium hydroxide was added to adjust the pH of the system to 5, resulting in a sodium hypochlorite solution with a content of 0.1 wt%.

[0058] The antibacterial quilt core fabric precursor and sodium hypochlorite solution were mixed at a solid-liquid ratio of 1:15. The sodium hypochlorite solution was heated to 40°C and soaked for 30 minutes. Then the fabric was taken out of the curing box, washed twice with purified water, and air-dried to obtain the antibacterial quilt core fabric.

[0059] During the reaction, when the pH is close to neutral, hypochlorous acid is mainly in the form of HOCl, which is highly electrophilic, has high reaction selectivity, and is relatively mild. This allows the amino groups to be chlorinated to form haloamines. Excessive acidity will generate Cl2, which can easily damage the fibers. The formed haloamines are stable "active chlorine reservoirs" that can transfer active chlorine to the surface of microorganisms and form broad-spectrum antibacterial activity with quaternary ammonium salts. Water washing mainly consumes active chlorine rather than washing away the functional layer. Then, under the same conditions, NaOCl is used for reversible chlorination to restore the high site occupancy rate, giving it long-lasting antibacterial properties and antibacterial regeneration performance. The chemical transformation of haloamines does not introduce cross-linking but weakens hydrogen bonds. The overall effect on the material's flexibility is no increase in hardness and a tendency to slightly soften, reducing the material's stiffness.

[0060] Example 3

[0061] This embodiment provides a method for preparing an antibacterial comforter fabric, specifically including the following steps:

[0062] Step 1: Preparation of pre-treated fabric

[0063] Weigh out 40g of sodium persulfate and 1L of deionized water and add them to the reaction flask. Stir until dissolved. Add 2.5mol / L sodium hydroxide solution to the reaction flask and adjust the pH of the system to 5.5 to obtain the activated solution.

[0064] A cotton-containing fabric with a cotton content of 45wt% was mixed with an activation solution at a solid-liquid ratio of 1:13. The activation solution was heated to 45℃ and subjected to ultrasonic treatment for 35 minutes. The fabric was then taken out and drained. It was washed four times with purified water and then placed in a drying oven at 45℃ and dried to constant weight to obtain the activated cotton-containing fabric.

[0065] Weigh out 5g of propylene 3-isocyanate and 200mL of N,N-dimethylformamide and add them to a beaker. Mix them evenly. Then add 40g of activated cotton fabric to the beaker. Sonicate at room temperature for 50min. Then take out the fabric and drain it. Wash it 4 times with purified water. Then place it in a drying oven at 45℃ and dry it to constant weight to obtain the pretreated fabric.

[0066] Step 2: Preparation of silicon-based haloamine precursor

[0067] Weigh out 10g of octamethylcyclotetrasiloxane, 2.8g of 3-aminopropylmethylsilane, and 2mL of 80wt% sulfuric acid and add them to a reaction flask. Stir the mixture and heat the flask to 90℃. Maintain the temperature for 90min. Add 2g of diallyltetramethyldisiloxane to the reaction flask and maintain the temperature for 2.5h. Cool the reaction flask to room temperature and add 5wt% sodium bicarbonate solution to adjust the pH of the system to 7. Increase the temperature of the reaction flask to 90℃ and apply a negative pressure of -0.1MPa to the reaction flask. Remove low-boiling substances by vacuum distillation to obtain the silane-based haloamine precursor.

[0068] Step 3: Prepare the precursor for the antibacterial comforter fabric.

[0069] N,N-dimethylformamide and deionized water were mixed evenly at a volume ratio of 2:5 to obtain a solvent;

[0070] Weigh out the following components by weight: 15 parts of polydimethyldiallylammonium chloride, 13 parts of silane-based haloamine precursor, 2.5 parts of potassium persulfate, and 100 parts of solvent. Mix them thoroughly to obtain an antibacterial finishing solution.

[0071] The pretreated fabric was placed in an antibacterial finishing solution and subjected to two dips and two nips. In the first nip, the nip pressure was set to 2 bar and the nip time to 2.5 min, with a nip rate of 65%. In the second nip, the nip pressure was set to 2.5 bar and the nip time to 3.5 min, with a nip rate of 75%, resulting in a nip-rolled fabric.

[0072] The impregnated fabric was placed in a curing chamber at 85°C and 85% humidity for 105 minutes. The fabric was then removed from the curing chamber, washed four times with purified water, and air-dried to obtain the precursor of the antibacterial quilt core fabric.

[0073] Step 4: Prepare antibacterial quilt core fabric

[0074] Sodium hypochlorite and deionized water were mixed, and sodium hydroxide was added to adjust the pH of the system to 5.5, resulting in a sodium hypochlorite solution with a content of 0.2 wt%.

[0075] The antibacterial quilt core fabric precursor and sodium hypochlorite solution were mixed at a solid-liquid ratio of 1:17. The sodium hypochlorite solution was heated to 44°C and soaked for 40 minutes. Then the fabric was taken out of the curing box, washed three times with purified water, and air-dried to obtain the antibacterial quilt core fabric.

[0076] Example 4

[0077] This embodiment provides a method for preparing an antibacterial comforter fabric, specifically including the following steps:

[0078] Step 1: Preparation of pre-treated fabric

[0079] Weigh out 50g of sodium persulfate and 1L of deionized water and add them to the reaction flask. Stir until dissolved. Add 3mol / L sodium hydroxide solution to the reaction flask and adjust the pH of the system to 6 to obtain the activated solution.

[0080] A cotton-containing fabric with a cotton content of 50wt% and an activation solution were mixed at a solid-liquid ratio of 1:15. The activation solution was heated to 50℃ and subjected to ultrasonic treatment for 40 minutes. The fabric was then taken out and drained. It was washed 5 times with purified water and then placed in a drying oven at 50℃ and dried to constant weight to obtain the activated cotton-containing fabric.

[0081] Weigh out 5g of propylene 3-isocyanate and 200mL of N,N-dimethylformamide and add them to a beaker. Mix them evenly. Then add 50g of activated cotton fabric to the beaker. Sonicate at room temperature for 60min. Then take out the fabric and drain it. Wash it 5 times with purified water. Then place it in a drying oven at 50℃ and dry it to constant weight to obtain the pretreated fabric.

[0082] Step 2: Preparation of silicon-based haloamine precursor

[0083] Weigh out 10g of octamethylcyclotetrasiloxane, 3.0g of 3-aminopropylmethylsilane, and 2mL of 85wt% sulfuric acid and add them to a reaction flask. Stir the mixture and heat the flask to 95℃. Maintain the temperature for 100min. Add 2g of diallyltetramethyldisiloxane to the flask and maintain the temperature for 3h. Cool the flask to room temperature and add 5wt% sodium bicarbonate solution to adjust the pH of the system to 7. Increase the temperature of the flask to 95℃ and apply a negative pressure of -0.1MPa to the flask. Remove low-boiling substances by vacuum distillation to obtain the silane-based haloamine precursor.

[0084] Step 3: Prepare the precursor for the antibacterial comforter fabric.

[0085] N,N-dimethylformamide and deionized water were mixed evenly at a volume ratio of 2:5 to obtain a solvent;

[0086] Weigh out the following components by weight: 20 parts of polydimethyldiallylammonium chloride, 15 parts of silane-based haloamine precursor, 3 parts of potassium persulfate, and 100 parts of solvent. Mix them evenly to obtain an antibacterial finishing solution.

[0087] The pretreated fabric was placed in an antibacterial finishing solution and subjected to two dips and two nips. In the first nip, the nip pressure was set to 2.5 bar, the nip time was 3 min, and the nip rate was 70%. In the second nip, the nip pressure was set to 3 bar, the nip time was 4 min, and the nip rate was 80%, thus obtaining the nip-dried fabric.

[0088] The impregnated fabric was placed in a curing chamber at a temperature of 90℃ and a humidity of 90% for 120 minutes. The fabric was then removed from the curing chamber, washed five times with purified water, and air-dried to obtain the precursor of the antibacterial quilt core fabric.

[0089] Step 4: Prepare antibacterial quilt core fabric

[0090] Sodium hypochlorite and deionized water were mixed, and sodium hydroxide was added to adjust the pH of the system to 6, resulting in a sodium hypochlorite solution with a content of 0.3 wt%.

[0091] The antibacterial quilt core fabric precursor and sodium hypochlorite solution were mixed at a solid-liquid ratio of 1:20. The sodium hypochlorite solution was heated to 50°C and soaked for 50 minutes. Then the fabric was taken out of the curing box, washed three times with purified water, and air-dried to obtain the antibacterial quilt core fabric.

[0092] Comparative Example 1

[0093] The difference between this comparative example and Example 4 is that, in step 1, a cotton-containing fabric with a cotton content of 50wt% is used instead of the activated cotton-containing fabric to participate in the preparation of the pretreatment fabric.

[0094] Comparative Example 2

[0095] The difference between this comparative example and Example 4 is that in step 2, the amount of 3-aminopropylmethylsilane added is reduced to 1g.

[0096] Comparative Example 3

[0097] The difference between this comparative example and Example 4 is that, in step 3, allyltrimethylammonium chloride is used instead of polydimethyldiallylammonium chloride.

[0098] Performance testing:

[0099] The antibacterial quilt core fabrics prepared in Examples 2-4 and Comparative Examples 1-3 were washed 50 times with water, and then washed and regenerated once with a 0.3wt% sodium hypochlorite solution. The changes in antibacterial properties and stiffness of the antibacterial quilt core fabrics before washing, after 50 washings, and after regeneration were measured.

[0100] The antibacterial properties of the samples were determined according to the standard GB / T 20944.2-2007 "Evaluation of antibacterial properties of textiles - Part 2: Absorption method" to determine their inhibition rates against Staphylococcus aureus, Klebsiella pneumoniae and Escherichia coli.

[0101] Stiffness change rate reference formula The calculation is performed, where T1 is the stiffness of the antibacterial quilt core fabric and T0 is the stiffness of the cotton-containing fabric. Specific test data are shown in Table 1 below.

[0102] Table 1 - Performance Test Data of Samples

[0103]

[0104] Data Analysis:

[0105] Comparative analysis of the data in Table 1 shows that the antibacterial quilt core fabric prepared by this invention achieved an inhibition rate of 99.8% against Staphylococcus aureus, 99.7% against Klebsiella pneumoniae, and 99.9% against Escherichia coli before washing; after 50 washes, the inhibition rate against Staphylococcus aureus reached 97.8%, against Klebsiella pneumoniae 96.4%, and against Escherichia coli 95.8%; after regeneration following washing, the inhibition rate against Staphylococcus aureus reached 99.7%, and the inhibition rate against Klebsiella pneumoniae 95.8% remained unchanged. The bacterial count reached 99.6%, and the inhibition rate against Escherichia coli reached 99.8%. The change rate of stiffness after finishing was -5.3%. All performance test data were better than the comparative example, indicating that the present invention, by oxidizing and activating cotton fabric and then performing antibacterial finishing with an antibacterial finishing liquid containing quaternary ammonium salt and silicon-based haloamine precursor, not only effectively improved the antibacterial properties and softness of the antibacterial quilt core fabric, but also endowed it with good antibacterial regeneration properties, thereby achieving a long-lasting antibacterial effect. The detachable positioning design of the quilt core makes it more suitable for practical life application scenarios.

[0106] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An antibacterial comforter fabric, characterized in that, The antibacterial comforter fabric is obtained by oxidizing and activating cotton fabric to prepare a pre-treated fabric, and then treating the pre-treated fabric with an antibacterial finishing solution. The antibacterial finishing solution comprises the following components by weight: 10-20 parts of polydimethyldiallylammonium chloride, 10-15 parts of a silane-based haloamine precursor, 2-3 parts of an initiator, and 100 parts of a solvent.

2. The antibacterial comforter fabric according to claim 1, characterized in that, The solvent is composed of N,N-dimethylformamide and deionized water in a volume ratio of 2:5; the initiator is persulfate.

3. The antibacterial comforter fabric according to claim 1, characterized in that, The method for preparing the silicon-based haloamine precursor is as follows: octamethylcyclotetrasiloxane, 3-aminopropylmethylsilane, and catalyst are mixed, the temperature of the reaction system is raised to 85-95℃, and the reaction is maintained at this temperature for 80-100 min. Diallyltetramethyldisiloxane is added to the reaction system, and the reaction is maintained at this temperature for 2-3 h. After post-treatment, the silicon-based haloamine precursor is obtained.

4. The antibacterial comforter fabric according to claim 3, characterized in that, The ratio of octamethylcyclotetrasiloxane, 3-aminopropylmethylsilane, catalyst, and diallyltetramethyldisiloxane is 10g:2.6-3.0g:2mL:2g, and the catalyst is 75-85wt% sulfuric acid.

5. The antibacterial comforter fabric according to claim 1, characterized in that, The pre-treated fabric is obtained by the following steps: A1. Mix persulfate and deionized water and stir until dissolved. Add sodium hydroxide solution to the reaction system and adjust the pH of the system to 5-6 to obtain the activated solution. A2. Place the cotton-containing fabric in an activation solution at a temperature of 40-50℃, keep it warm and sonicate for 30-40 minutes, and then perform post-treatment to obtain the activated cotton-containing fabric. A3. Mix propylene 3-isocyanate and N,N-dimethylformamide, add activated cotton fabric to the reaction system, and sonicate at room temperature for 40-60 minutes. Then perform post-treatment to obtain the pre-treated fabric.

6. The antibacterial comforter fabric according to claim 5, characterized in that, In step A1, the ratio of persulfate to deionized water is 3-5g:100mL, and the concentration of sodium hydroxide solution is 2-3mol / L; in step A2, the solid-liquid ratio of cotton fabric to activation solution is 1:10-15; in step A3, the ratio of propylene 3-isocyanate, N,N-dimethylformamide and activated cotton fabric is 0.5g:20mL:3-5g.

7. The antibacterial comforter fabric according to claim 1, characterized in that, The antibacterial finishing process includes the following steps: B1. Mix polydimethyldiallylammonium chloride, silane-based haloamine precursor, initiator and solvent to obtain antibacterial finishing solution. Place the pretreated fabric in the antibacterial finishing solution and perform two dips and two nips to obtain padded fabric. B2. Place the impregnated fabric in a curing chamber at a temperature of 80-90℃ and a humidity of 80-90% for 90-120 minutes for heat and moisture treatment, followed by post-treatment to obtain the precursor of the antibacterial quilt core fabric. B3. Place the antibacterial quilt core fabric precursor in a sodium hypochlorite solution at a temperature of 40-50℃ and soak for 30-50 minutes. Then perform post-treatment to obtain the antibacterial quilt core fabric.

8. The antibacterial comforter fabric according to claim 7, characterized in that, In step B1, during the two-dip and two-roll process, in the first roll, the roll pressure is 1.5-2.5 bar, the roll time is 2-3 min, and the roll residue is 60-70%; in the second roll, the roll pressure is 2-3 bar, the roll time is 3-4 min, and the roll residue is 70-80%. In step B3, the solid-liquid ratio of the antibacterial quilt core fabric precursor and the sodium hypochlorite solution is 1:15-20, the concentration of the sodium hypochlorite solution is 0.1-0.3 wt%, and the pH is 5-6.

9. A detachable multi-layered three-dimensional structure comforter core, characterized in that, The quilt includes at least two or more functional layers and an antibacterial quilt core fabric as described in any one of claims 1-8 covering the exterior of the functional layers. The functional layers are stacked and combined with each other, and a detachable connection structure is provided between the functional layers and the antibacterial quilt core fabric to achieve positioning and fixation of the layers.

10. A detachable multi-layered three-dimensional structure comforter core according to claim 9, characterized in that, The detachable connection structure is one or more combinations of zippers, Velcro, buttons, and snap fasteners.

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