High-strength bacteriostatic sea wave type multi-fiber composite bed core material and preparation method thereof

Abstract

This invention relates to the field of mattress core materials, specifically to a high-strength, antibacterial, wave-shaped multi-fiber composite mattress core material and its preparation method, addressing the problems of low strength and poor antibacterial performance in existing mattress core materials. The preparation method uses jute fiber, bamboo charcoal fiber, long-staple cotton fiber, and wool fiber as base materials, endowing the mattress core material with excellent moisture absorption, warmth retention, and comfort. Adding high-strength antibacterial fibers significantly improves the strength and antibacterial properties of the mattress core material, enhancing its durability and health benefits. Therefore, the composite mattress core material of this invention not only improves user comfort but also effectively inhibits bacterial growth, achieving antibacterial and deodorizing effects, thus ensuring hygiene and health.

Description

Technical Field

[0001] This invention relates to the field of bed core materials, specifically to a high-strength, antibacterial wave-shaped multi-fiber composite bed core material and its preparation method. Background Technology

[0002] As people's living standards improve, their demands for sleep quality and the healthiness of bedding are becoming increasingly stringent. As a core component of bedding, the performance of mattress core materials directly determines sleep comfort, durability, and hygiene safety. Traditional mattress core materials mainly include springs, foam, latex, and natural fibers. Among these, natural materials are favored by the market due to their excellent moisture absorption and breathability, environmental friendliness, and affordability.

[0003] Existing bed core materials are mainly made of single natural fibers (such as coconut fiber, jute, and cotton). Although traditional natural fibers are breathable, they are prone to absorbing moisture and becoming moldy, breeding bacteria and mites. Moreover, they have low strength, and although they are comfortable, they lack effective support and are prone to collapsing and deforming after long-term use.

[0004] Therefore, developing a high-strength antibacterial wave-shaped multi-fiber composite bed core material that combines high strength and long-lasting antibacterial effect has become an urgent need in the current bedding industry. Summary of the Invention

[0005] In order to overcome the above-mentioned technical problems, the purpose of this invention is to provide a high-strength antibacterial wave-shaped multi-fiber composite bed core material and its preparation method, which solves the problems of low strength and poor antibacterial performance of existing bed core materials.

[0006] The objective of this invention can be achieved through the following technical solutions: In a first aspect, this application provides a high-strength, antibacterial, wave-shaped multi-fiber composite bed core material, comprising the following components in parts by weight: 30-40 parts jute fiber, 8-12 parts bamboo charcoal fiber, 20-25 parts long-staple cotton fiber, 10-15 parts wool fiber, and 5-35 parts high-strength antibacterial fiber; The high-strength antibacterial fiber is prepared by the following steps: Polyester chips, epoxy quaternary ammonium compounds, and modified silver-loaded carbon nanotubes were added to an extruder, melt-extruded, and spun to obtain a high-strength antibacterial fiber with a diameter of 25 μm.

[0007] In a preferred embodiment of the present invention, the ratio of polyester chips, epoxy quaternary ammonium compound and modified silver-supported carbon nanotubes is 100g: 1-7g: 0.5-3.5g.

[0008] In a preferred embodiment of the present invention, the polyester chip is a CB-608S polyester chip.

[0009] In a preferred embodiment of the present invention, the epoxy quaternary ammonium compound is prepared by the following steps: Step a1: Add hydroquinone and glacial acetic acid to a three-necked flask equipped with a stirrer, thermometer, constant pressure dropping funnel and gas delivery tube. Purge with nitrogen for protection and stir the reaction at 5-15℃ and 200-300 r / min for 10-20 min. Then, while stirring, add liquid bromine dropwise at a rate of 1-3 drops / s. After the addition is complete, continue stirring for 20-30 min. Then, raise the temperature to 60-65℃ and continue stirring for 1-2 h. Then, raise the temperature to 90-100℃ and continue stirring for 2-3 h. After the reaction is complete, filter the reaction product under vacuum. Wash the filter cake 2-3 times with anhydrous ethanol and then place it in a vacuum drying oven at 40-50℃ for 2-3 h to obtain the polybrominated diphenol compound. Step a2: Add the polybrominated diphenol compound, epichlorohydrin, and tetrabutylammonium bromide to a three-necked flask equipped with a stirrer, thermometer, and gas delivery tube. Purge with nitrogen for protection and stir the reaction at 20-25℃ and 200-300 r / min for 20-30 min. Then raise the temperature to 80-90℃ and continue stirring for 5-6 h. After cooling to 60-70℃, add sodium hydroxide solution and continue stirring for 2-3 h. After the reaction is complete, cool the reaction product to room temperature and pour it into dichloromethane. Then filter under vacuum. Wash the filtrate 2-3 times with distilled water and dry it with anhydrous sodium sulfate. Then filter under vacuum and remove the solvent by rotary evaporation to obtain the epoxy polybrominated compound. Step a3: Add the epoxy polybrominated compound, 3-methylpyridine, and anhydrous acetonitrile to a three-necked flask equipped with a stirrer, thermometer, and gas delivery tube. Purge with nitrogen for protection and stir the reaction at 20-25℃ and 200-300 r / min for 10-30 min. Then raise the temperature to 80-90℃ and continue stirring for 15-20 h. After the reaction is complete, cool the reaction product to room temperature, remove the solvent by rotary evaporation, and then purify by silica gel column chromatography using a mixed solvent to obtain the epoxy quaternary ammonium compound.

[0010] In a preferred embodiment of the present invention, the ratio of hydroquinone, glacial acetic acid and liquid bromine used in step a1 is 15 mmol: 20-25 mL: 70-75 mL.

[0011] In a preferred embodiment of the present invention, the ratio of the polybrominated diphenol compound, epichlorohydrin, tetrabutylammonium bromide and sodium hydroxide solution in step a2 is 5g:50-60g:0.3-0.5g:18-22mL.

[0012] In a preferred embodiment of the present invention, the sodium hydroxide solution in step a2 has a mass fraction of 20-25%.

[0013] In a preferred embodiment of the present invention, the ratio of the epoxy polybrominated compound, 3-methylpyridine and anhydrous acetonitrile in step a3 is 10 mmol: 45-55 mmol: 50-60 mL.

[0014] In a preferred embodiment of the present invention, the mixed solvent in step a3 is a mixture of methanol and dichloromethane in a volume ratio of 1-3:8.

[0015] In a preferred embodiment of the present invention, the modified silver-supported carbon nanotubes are prepared by the following steps: Step b1: Add carbon nanotubes and concentrated nitric acid to a three-necked flask equipped with a stirrer, thermometer, and gas delivery tube. Purge with nitrogen for protection and stir the reaction at 20-25℃ and 200-300 r / min for 10-30 min. Then raise the temperature to 80-90℃ and continue stirring for 3-6 h. After the reaction is complete, cool the reaction product to room temperature and then filter it under vacuum. Wash the filter cake with distilled water 3-5 times and then place it in a vacuum drying oven and dry it at 70-80℃ for 2-3 h to obtain acidified carbon nanotubes. Step b2: Add silver nitrate and deionized water to a three-necked flask equipped with a stirrer, thermometer, and gas delivery tube. Purge with nitrogen for protection and stir for 20-30 min at 20-25℃ and 200-300 r / min. Then add acidified carbon nanotubes and trisodium citrate and continue stirring for 3-6 h. After the reaction is complete, cool the reaction product to room temperature and then filter under vacuum. Place the filter cake in a vacuum drying oven and dry it at 70-80℃ for 1-2 h. Then place it in a muffle furnace and calcine it at 250-260℃ for 1-2 h. Then cool it with the furnace to obtain silver-loaded carbon nanotubes. Step b3: Add silver-supported carbon nanotubes and deionized water to a three-necked flask equipped with a stirrer and thermometer. Stir the reaction at 20-25℃ and 200-300 r / min for 20-30 min. Then adjust the pH to 8.5-9 with sodium hydroxide solution. Add tris(hydroxymethyl)aminomethane hydrochloride and dopamine hydrochloride and continue stirring for 5-6 h. After the reaction is complete, centrifuge the reaction product and wash the precipitate 2-3 times with distilled water. Then place it in a vacuum drying oven and dry it at 60-70℃ for 3-4 h to obtain modified silver-supported carbon nanotubes.

[0016] In a preferred embodiment of the present invention, the ratio of carbon nanotubes to concentrated nitric acid in step b1 is 1g: 20-25mL.

[0017] In a preferred embodiment of the present invention, the carbon nanotubes in step b1 are multi-walled carbon nanotubes XFM13; and the mass fraction of the concentrated nitric acid is 66-68%.

[0018] In a preferred embodiment of the present invention, the ratio of silver nitrate, deionized water, acidified carbon nanotubes and trisodium citrate in step b2 is 0.2-0.8g: 90-100mL: 3g: 1.8-3.2g.

[0019] In a preferred embodiment of the present invention, the ratio of silver-supported carbon nanotubes, deionized water, tris(hydroxymethyl)aminomethane hydrochloride and dopamine hydrochloride in step b3 is 5g:70-80mL:0.63g:0.2g.

[0020] In a preferred embodiment of the present invention, the sodium hydroxide solution in step b3 has a mass fraction of 5-10%.

[0021] Secondly, this application provides a method for preparing a high-strength, antibacterial, wave-shaped multi-fiber composite bed core material, comprising the following steps: Step 1: Weigh out 30-40 parts jute fiber, 8-12 parts bamboo charcoal fiber, 20-25 parts long-staple cotton fiber, 10-15 parts wool fiber, and 5-35 parts high-strength antibacterial fiber according to the weight proportions, and set aside. Step 2: Mix jute fiber, bamboo charcoal fiber, long-staple cotton fiber, wool fiber and high-strength antibacterial fiber, then feed them into the medium opening machine for opening, and then lay the net using a vertical net laying equipment. The speed difference of the two belts makes the middle layer of each layer form multiple peaks, which are evenly arranged to form a mesh semi-finished product with a wave-shaped cross-section structure. Step 3: The mesh semi-finished product is dried and cold-pressed to obtain a high-strength, antibacterial wave-shaped multi-fiber composite bed core material.

[0022] The beneficial effects of this invention are: The present invention relates to a high-strength antibacterial wave-shaped multi-fiber composite bed core material and its preparation method. The method involves mixing jute fiber, bamboo charcoal fiber, long-staple cotton fiber, wool fiber, and high-strength antibacterial fiber, then feeding the mixture into an opening machine for opening. Following this, a vertical web-laying device is used to lay the web, and the speed difference between two belts causes multiple peaks to form in the middle layer of each layer, evenly arranging them to form a wave-shaped cross-sectional mesh semi-finished product. This mesh semi-finished product is then dried and cold-pressed to obtain the high-strength antibacterial wave-shaped multi-fiber composite bed core material. This preparation method uses jute fiber, bamboo charcoal fiber, long-staple cotton fiber, and wool fiber as base materials, giving the bed core material excellent moisture absorption, warmth retention, and comfort. Adding high-strength antibacterial fiber significantly improves the strength and antibacterial properties of the bed core material, enhancing its durability and health benefits. Therefore, the composite bed core material of the present invention not only improves user comfort but also effectively inhibits bacterial growth, achieving antibacterial and deodorizing effects, thus ensuring hygiene and health.

[0023] In the preparation of a high-strength, antibacterial, wave-shaped multi-fiber composite bed core material, a high-strength antibacterial fiber was first prepared. A reaction was then conducted using hydroquinone and liquid bromine, with liquid bromine acting as a brominating agent to introduce multiple bromine atoms onto the benzene ring of hydroquinone, yielding a polybrominated diphenol compound. Next, a reaction was conducted using the polybrominated diphenol compound and epichlorohydrin, where the hydroxyl groups on the polybrominated diphenol compound reacted with the epoxy groups on epichlorohydrin through a ring-opening-ring-closing reaction, thus introducing epoxy groups to obtain an epoxy-based polybrominated compound. Finally, a reaction was conducted using the epoxy-based polybrominated compound and 3-methylpyridine, where the bromine atoms on the epoxy-based polybrominated compound reacted with the tertiary amine groups on 3-methylpyridine to form quaternary ammonium groups, yielding an epoxy-based quaternary ammonium compound. Carbon nanotubes were treated with concentrated nitric acid to remove impurities while simultaneously etching and oxidizing them, enhancing their reactivity to obtain acidified carbon nanotubes. Silver ions were then used to reduce the acidified carbon nanotubes to form silver nanoparticles, which were then loaded onto the acidified carbon nanotubes to obtain silver-loaded carbon nanotubes. Finally, silver... Polydopamine is coated onto the surface of loaded carbon nanotubes to obtain modified silver-loaded carbon nanotubes. Finally, epoxy-based quaternary ammonium compounds and modified silver-loaded carbon nanotubes are added to polyester chips and spun to obtain high-strength antibacterial fibers. The quaternary ammonium groups in the epoxy-based quaternary ammonium compounds can adsorb negatively charged bacterial cell membranes through electrostatic interactions, leading to bacterial lysis and death. At the same time, the epoxy groups can react with the hydroxyl groups on the surface of polyester fibers to achieve a strong bond and prevent detachment. In the modified silver-loaded carbon nanotubes, silver ions have broad-spectrum antibacterial properties, which can destroy bacterial DNA and enzyme systems and inhibit bacterial reproduction. The presence of carbon nanotubes can significantly improve their mechanical properties. After being coated with polydopamine, their compatibility with polyester fibers is improved, and the active groups can achieve chemical bonding with epoxy groups. Therefore, the synergistic effect of epoxy-based quaternary ammonium compounds and modified silver-loaded carbon nanotubes can significantly improve the strength and antibacterial performance of high-strength antibacterial fibers. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example

[0025] This embodiment describes a method for preparing a high-strength, antibacterial, wave-shaped multi-fiber composite bed core material, including the following steps: Step S1: Add 15 mmol of hydroquinone and 20 mL of glacial acetic acid to a three-necked flask equipped with a stirrer, thermometer, constant pressure dropping funnel and gas delivery tube. Purge with nitrogen for protection and stir at 5 °C and 200 r / min for 10 min. Then, while stirring, add 70 mL of liquid bromine dropwise at a rate of 1 drop / s. After the addition is complete, continue stirring for 20 min. Then, raise the temperature to 60 °C and continue stirring for 1 h. Then, raise the temperature to 90 °C and continue stirring for 2 h. After the reaction is complete, filter the reaction product under vacuum. Wash the filter cake twice with anhydrous ethanol and then place it in a vacuum drying oven and dry at 40 °C for 2 h to obtain the polybrominated diphenol compound. Step S2: Add 5g of polybrominated diphenol compound, 50g of epichlorohydrin and 0.3g of tetrabutylammonium bromide to a three-necked flask equipped with a stirrer, thermometer and gas delivery tube. Purge with nitrogen for protection and stir at 20℃ and 200r / min for 20min. Then raise the temperature to 80℃ and continue stirring for 5h. Then lower the temperature to 60℃ and add 18mL of 20% sodium hydroxide solution and continue stirring for 2h. After the reaction is complete, cool the reaction product to room temperature and pour it into dichloromethane. Then filter under vacuum, wash the filtrate twice with distilled water, dry with anhydrous sodium sulfate, filter under vacuum, and remove the solvent by rotary evaporation to obtain epoxy polybrominated compound. Step S3: 10 mmol of epoxy polybrominated compound, 45 mmol of 3-methylpyridine and 50 mL of anhydrous acetonitrile were added to a three-necked flask equipped with a stirrer, thermometer and gas delivery tube. Nitrogen gas was introduced for protection. The mixture was stirred at 20 °C and 200 r / min for 10 min. Then the temperature was raised to 80 °C and the mixture was stirred for 15 h. After the reaction was completed, the reaction product was cooled to room temperature. The solvent was then removed by rotary evaporation. The product was then purified by silica gel column chromatography using a mixed solvent of methanol and dichloromethane in a volume ratio of 1:8 to obtain epoxy quaternary ammonium compound. Step S4: Add 1g of multi-walled carbon nanotubes XFM13 and 20mL of 66% concentrated nitric acid to a three-necked flask equipped with a stirrer, thermometer, and gas delivery tube. Purge with nitrogen for protection and stir at 20℃ and 200r / min for 10min. Then raise the temperature to 80℃ and continue stirring for 3h. After the reaction is complete, cool the reaction product to room temperature, then filter under vacuum. Wash the filter cake three times with distilled water and then place it in a vacuum drying oven and dry at 70℃ for 2h to obtain acidified carbon nanotubes. Step S5: Add 0.2g of silver nitrate and 90mL of deionized water to a three-necked flask equipped with a stirrer, thermometer, and gas delivery tube. Purge with nitrogen for protection and stir at 20℃ and 200r / min for 20min. Then add 3g of acidified carbon nanotubes and 1.8g of trisodium citrate and continue stirring for 3h. After the reaction is complete, cool the reaction product to room temperature and then filter under vacuum. Place the filter cake in a vacuum drying oven and dry at 70℃ for 1h. Then place it in a muffle furnace and calcine at 250℃ for 1h. Then cool with the furnace to obtain silver-loaded carbon nanotubes. Step S6: Add 5g of silver-supported carbon nanotubes and 70mL of deionized water to a three-necked flask equipped with a stirrer and thermometer. Stir the reaction at 20℃ and 200r / min for 20min. Then adjust the pH to 8.5 with 5% sodium hydroxide solution. Add 0.63g of tris(hydroxymethyl)aminomethane hydrochloride and 0.2g of dopamine hydrochloride and continue stirring for 5h. After the reaction is complete, centrifuge the reaction product, wash the precipitate twice with distilled water, and then place it in a vacuum drying oven and dry at 60℃ for 3h to obtain modified silver-supported carbon nanotubes. Step S7: Add 100g of CB-608S polyester chips, 1g of epoxy quaternary ammonium compound and 0.5g of modified silver-loaded carbon nanotubes into an extruder, melt extrusion, and textile molding to obtain a high-strength antibacterial fiber with a diameter of 25μm. Step S8: Weigh out 30 parts jute fiber, 8 parts bamboo charcoal fiber, 20 parts long-staple cotton fiber, 10 parts wool fiber, and 5 parts high-strength antibacterial fiber according to the weight proportions, and set aside. Step S9: Mix jute fiber, bamboo charcoal fiber, long-staple cotton fiber, wool fiber and high-strength antibacterial fiber, then feed them into the medium opening machine for opening, and then lay the net using a vertical net laying equipment. The speed difference of the two belts makes the middle layer of each layer form multiple peaks, which are evenly arranged to form a mesh semi-finished product with a wave-shaped cross-section structure. Step S10: The mesh semi-finished product is dried and cold-pressed to obtain a high-strength, antibacterial wave-shaped multi-fiber composite bed core material. Example

[0026] This embodiment describes a method for preparing a high-strength, antibacterial, wave-shaped multi-fiber composite bed core material, including the following steps: Step S1: 15 mmol of hydroquinone and 22 mL of glacial acetic acid were added to a three-necked flask equipped with a stirrer, thermometer, constant pressure dropping funnel and gas delivery tube. Nitrogen gas was introduced for protection. The mixture was stirred for 15 min at 10 °C and a stirring rate of 250 r / min. Then, 72 mL of liquid bromine was added dropwise while stirring, with the dropping rate controlled at 2 drops / s. After the addition was completed, the mixture was stirred for another 25 min. Then, the temperature was raised to 62 °C and the mixture was stirred for another 1.5 h. After that, the temperature was raised to 95 °C and the mixture was stirred for another 2.5 h. After the reaction was completed, the reaction product was vacuum filtered. The filter cake was washed twice with anhydrous ethanol and then placed in a vacuum drying oven and dried at 45 °C for 2.5 h to obtain the polybrominated diphenol compound. Step S2: Add 5g of polybrominated diphenol compound, 55g of epichlorohydrin and 0.4g of tetrabutylammonium bromide to a three-necked flask equipped with a stirrer, thermometer and gas delivery tube. Under nitrogen protection, stir the reaction at 22℃ and 250r / min for 25min. Then raise the temperature to 85℃ and continue stirring for 5.5h. After cooling to 65℃, add 20mL of 22% sodium hydroxide solution and continue stirring for 2.5h. After the reaction is completed, cool the reaction product to room temperature and pour it into dichloromethane. Then filter under vacuum. Wash the filtrate twice with distilled water and dry it with anhydrous sodium sulfate. Then filter under vacuum and remove the solvent by rotary evaporation to obtain epoxy polybrominated compound. Step S3: 10 mmol of epoxy polybrominated compound, 50 mmol of 3-methylpyridine and 55 mL of anhydrous acetonitrile were added to a three-necked flask equipped with a stirrer, thermometer and gas delivery tube. Nitrogen gas was introduced for protection. The mixture was stirred at 22 °C and 250 r / min for 20 min. Then the temperature was raised to 85 °C and the mixture was stirred for 18 h. After the reaction was completed, the reaction product was cooled to room temperature. The solvent was then removed by rotary evaporation. The product was then purified by silica gel column chromatography using a mixed solvent of methanol and dichloromethane in a volume ratio of 2:8 to obtain epoxy quaternary ammonium compound. Step S4: Add 1g of multi-walled carbon nanotubes XFM13 and 22mL of concentrated nitric acid with a mass fraction of 67% to a three-necked flask equipped with a stirrer, thermometer, and gas delivery tube. Purge with nitrogen for protection and stir at 22℃ and 250r / min for 20min. Then raise the temperature to 85℃ and continue stirring for 4.5h. After the reaction is completed, cool the reaction product to room temperature, then filter under vacuum. Wash the filter cake four times with distilled water and then place it in a vacuum drying oven and dry at 75℃ for 2.5h to obtain acidified carbon nanotubes. Step S5: Add 0.5g silver nitrate and 95mL deionized water to a three-necked flask equipped with a stirrer, thermometer, and gas delivery tube. Purge with nitrogen for protection and stir at 22℃ and 250r / min for 25min. Then add 3g acidified carbon nanotubes and 2.5g trisodium citrate and continue stirring for 4.5h. After the reaction is complete, cool the reaction product to room temperature and then filter under vacuum. Place the filter cake in a vacuum drying oven and dry at 75℃ for 1.5h. Then place it in a muffle furnace and calcine at 255℃ for 1.5h. After that, cool with the furnace to obtain silver-loaded carbon nanotubes. Step S6: Add 5g of silver-supported carbon nanotubes and 75mL of deionized water to a three-necked flask equipped with a stirrer and thermometer. Stir the mixture at 22℃ and 250r / min for 25min. Then adjust the pH to 8.5 with 8% sodium hydroxide solution. Add 0.63g of tris(hydroxymethyl)aminomethane hydrochloride and 0.2g of dopamine hydrochloride and continue stirring for 5.5h. After the reaction is complete, centrifuge the reaction product and wash the precipitate twice with distilled water. Then place it in a vacuum drying oven and dry it at 65℃ for 3.5h to obtain modified silver-supported carbon nanotubes. Step S7: Add 100g of CB-608S polyester chips, 4g of epoxy quaternary ammonium compound and 2g of modified silver-loaded carbon nanotubes into an extruder, melt extrude and spin-shape to obtain a high-strength antibacterial fiber with a diameter of 25μm. Step S8: Weigh out 35 parts jute fiber, 10 parts bamboo charcoal fiber, 22 parts long-staple cotton fiber, 12 parts wool fiber, and 20 parts high-strength antibacterial fiber according to the weight proportions, and set aside. Step S9: Mix jute fiber, bamboo charcoal fiber, long-staple cotton fiber, wool fiber and high-strength antibacterial fiber, then feed them into the medium opening machine for opening, and then lay the net using a vertical net laying equipment. The speed difference of the two belts makes the middle layer of each layer form multiple peaks, which are evenly arranged to form a mesh semi-finished product with a wave-shaped cross-section structure. Step S10: The mesh semi-finished product is dried and cold-pressed to obtain a high-strength, antibacterial wave-shaped multi-fiber composite bed core material. Example

[0027] This embodiment describes a method for preparing a high-strength, antibacterial, wave-shaped multi-fiber composite bed core material, including the following steps: Step S1: Add 15 mmol of hydroquinone and 25 mL of glacial acetic acid to a three-necked flask equipped with a stirrer, thermometer, constant pressure dropping funnel and gas delivery tube. Purge with nitrogen for protection and stir at 15 °C and 300 r / min for 20 min. Then, while stirring, add 75 mL of liquid bromine dropwise at a rate of 3 drops / s. After the addition is complete, continue stirring for 30 min. Then, raise the temperature to 65 °C and continue stirring for 2 h. Then, raise the temperature to 100 °C and continue stirring for 3 h. After the reaction is complete, filter the reaction product under vacuum. Wash the filter cake three times with anhydrous ethanol and then place it in a vacuum drying oven and dry at 50 °C for 3 h to obtain the polybrominated diphenol compound. Step S2: Add 5g of polybrominated diphenol compound, 60g of epichlorohydrin and 0.5g of tetrabutylammonium bromide to a three-necked flask equipped with a stirrer, thermometer and gas delivery tube. Purge with nitrogen for protection and stir at 25℃ and 300r / min for 30min. Then raise the temperature to 90℃ and continue stirring for 6h. Then lower the temperature to 70℃ and add 22mL of 25% sodium hydroxide solution and continue stirring for 3h. After the reaction is complete, cool the reaction product to room temperature and pour it into dichloromethane. Then filter under vacuum, wash the filtrate three times with distilled water, dry with anhydrous sodium sulfate, filter under vacuum, and remove the solvent by rotary evaporation to obtain epoxy polybrominated compound. Step S3: 10 mmol of epoxy polybrominated compound, 55 mmol of 3-methylpyridine and 60 mL of anhydrous acetonitrile were added to a three-necked flask equipped with a stirrer, thermometer and gas delivery tube. Nitrogen gas was introduced for protection. The mixture was stirred at 25 °C and 300 r / min for 30 min. Then the temperature was raised to 90 °C and the mixture was stirred for 20 h. After the reaction was completed, the reaction product was cooled to room temperature. The solvent was then removed by rotary evaporation. The product was then purified by silica gel column chromatography using a mixed solvent of methanol and dichloromethane in a volume ratio of 3:8 to obtain epoxy quaternary ammonium compound. Step S4: Add 1g of multi-walled carbon nanotubes XFM13 and 25mL of concentrated nitric acid with a mass fraction of 68% to a three-necked flask equipped with a stirrer, thermometer and gas delivery tube. Purge with nitrogen for protection and stir at 25℃ and 300r / min for 30min. Then raise the temperature to 90℃ and continue stirring for 6h. After the reaction is completed, cool the reaction product to room temperature and then filter under vacuum. Wash the filter cake 5 times with distilled water and then place it in a vacuum drying oven and dry at 80℃ for 3h to obtain acidified carbon nanotubes. Step S5: Add 0.8g of silver nitrate and 100mL of deionized water to a three-necked flask equipped with a stirrer, thermometer, and gas delivery tube. Purge with nitrogen for protection and stir at 25℃ and 300r / min for 30min. Then add 3g of acidified carbon nanotubes and 3.2g of trisodium citrate and continue stirring for 6h. After the reaction is complete, cool the reaction product to room temperature and then vacuum filter it. Place the filter cake in a vacuum drying oven and dry it at 80℃ for 2h. Then place it in a muffle furnace and calcine it at 260℃ for 2h. Then cool it with the furnace to obtain silver-loaded carbon nanotubes. Step S6: Add 5g of silver-supported carbon nanotubes and 80mL of deionized water to a three-necked flask equipped with a stirrer and thermometer. Stir the reaction at 25℃ and 300r / min for 30min. Then adjust the pH to 9 with 10% sodium hydroxide solution. Add 0.63g of tris(hydroxymethyl)aminomethane hydrochloride and 0.2g of dopamine hydrochloride and continue stirring for 6h. After the reaction is complete, centrifuge the reaction product, wash the precipitate three times with distilled water, and then place it in a vacuum drying oven and dry at 70℃ for 4h to obtain modified silver-supported carbon nanotubes. Step S7: Add 100g of CB-608S polyester chips, 7g of epoxy quaternary ammonium compound and 3.5g of modified silver-loaded carbon nanotubes into an extruder, melt extrusion, and textile molding to obtain a high-strength antibacterial fiber with a diameter of 25μm. Step S8: Weigh out 40 parts jute fiber, 12 parts bamboo charcoal fiber, 25 parts long-staple cotton fiber, 15 parts wool fiber, and 35 parts high-strength antibacterial fiber according to the weight proportions, and set aside. Step S9: Mix jute fiber, bamboo charcoal fiber, long-staple cotton fiber, wool fiber and high-strength antibacterial fiber, then feed them into the medium opening machine for opening, and then lay the net using a vertical net laying equipment. The speed difference of the two belts makes the middle layer of each layer form multiple peaks, which are evenly arranged to form a mesh semi-finished product with a wave-shaped cross-section structure. Step S10: The mesh semi-finished product is dried and cold-pressed to obtain a high-strength, antibacterial wave-shaped multi-fiber composite bed core material.

[0028] Comparative Example 1: This comparative example illustrates a method for preparing a high-strength, antibacterial, wave-shaped multi-fiber composite bed core material, comprising the following steps: Step S1: Weigh out 40 parts jute fiber, 12 parts bamboo charcoal fiber, 25 parts long-staple cotton fiber and 15 parts wool fiber according to the weight ratio, and set aside. Step S2: Mix jute fiber, bamboo charcoal fiber, long-staple cotton fiber and wool fiber, then feed them into a medium opening machine for opening, and then lay the net using a vertical net laying equipment. The speed difference of the two belts makes the middle layer of each layer form multiple peaks, which are evenly arranged to form a wave-shaped cross-section structure of the net semi-finished product. Step S3: The mesh semi-finished product is dried and cold-pressed to obtain a high-strength, antibacterial wave-shaped multi-fiber composite bed core material.

[0029] Comparative Example 2: This comparative example illustrates a method for preparing a high-strength, antibacterial, wave-shaped multi-fiber composite bed core material, comprising the following steps: Step S1: Add CB-608S polyester chips into an extruder, melt extrude, and spin into shape to obtain polyester fibers with a diameter of 25μm. Step S2: Weigh out 40 parts jute fiber, 12 parts bamboo charcoal fiber, 25 parts long-staple cotton fiber, 15 parts wool fiber and 35 parts polyester fiber according to the weight ratio, and set aside. Step S3: Mix jute fiber, bamboo charcoal fiber, long-staple cotton fiber, wool fiber and polyester fiber, then feed them into the medium opening machine for opening, and then lay the net using a vertical net laying equipment. The speed difference of the two belts makes the middle layer of each layer form multiple peaks, which are evenly arranged to form a wave-shaped cross-section structure of the net semi-finished product. Step S4: The mesh semi-finished product is dried and cold-pressed to obtain a high-strength, antibacterial wave-shaped multi-fiber composite bed core material.

[0030] Comparative Example 3: This comparative example illustrates a method for preparing a high-strength, antibacterial, wave-shaped multi-fiber composite bed core material, comprising the following steps: Step S1: Add 15 mmol of hydroquinone and 25 mL of glacial acetic acid to a three-necked flask equipped with a stirrer, thermometer, constant pressure dropping funnel and gas delivery tube. Purge with nitrogen for protection and stir at 15 °C and 300 r / min for 20 min. Then, while stirring, add 75 mL of liquid bromine dropwise at a rate of 3 drops / s. After the addition is complete, continue stirring for 30 min. Then, raise the temperature to 65 °C and continue stirring for 2 h. Then, raise the temperature to 100 °C and continue stirring for 3 h. After the reaction is complete, filter the reaction product under vacuum. Wash the filter cake three times with anhydrous ethanol and then place it in a vacuum drying oven and dry at 50 °C for 3 h to obtain the polybrominated diphenol compound. Step S2: Add 5g of polybrominated diphenol compound, 60g of epichlorohydrin and 0.5g of tetrabutylammonium bromide to a three-necked flask equipped with a stirrer, thermometer and gas delivery tube. Purge with nitrogen for protection and stir at 25℃ and 300r / min for 30min. Then raise the temperature to 90℃ and continue stirring for 6h. Then lower the temperature to 70℃ and add 22mL of 25% sodium hydroxide solution and continue stirring for 3h. After the reaction is complete, cool the reaction product to room temperature and pour it into dichloromethane. Then filter under vacuum, wash the filtrate three times with distilled water, dry with anhydrous sodium sulfate, filter under vacuum, and remove the solvent by rotary evaporation to obtain epoxy polybrominated compound. Step S3: 10 mmol of epoxy polybrominated compound, 55 mmol of 3-methylpyridine and 60 mL of anhydrous acetonitrile were added to a three-necked flask equipped with a stirrer, thermometer and gas delivery tube. Nitrogen gas was introduced for protection. The mixture was stirred at 25 °C and 300 r / min for 30 min. Then the temperature was raised to 90 °C and the mixture was stirred for 20 h. After the reaction was completed, the reaction product was cooled to room temperature. The solvent was then removed by rotary evaporation. The product was then purified by silica gel column chromatography using a mixed solvent of methanol and dichloromethane in a volume ratio of 3:8 to obtain epoxy quaternary ammonium compound. Step S4: Add 100g of CB-608S polyester chips and 7g of epoxy quaternary ammonium compound to an extruder, melt extrude, and spin into shape to obtain a high-strength antibacterial fiber with a diameter of 25μm. Step S5: Weigh out 40 parts jute fiber, 12 parts bamboo charcoal fiber, 25 parts long-staple cotton fiber, 15 parts wool fiber, and 35 parts high-strength antibacterial fiber according to the weight proportions, and set aside. Step S6: Mix jute fiber, bamboo charcoal fiber, long-staple cotton fiber, wool fiber and high-strength antibacterial fiber, then feed them into the medium opening machine for opening, and then lay the net using a vertical net laying equipment. The speed difference of the two belts makes the middle layer of each layer form multiple peaks, which are evenly arranged to form a wave-shaped cross-section structure of the net semi-finished product. Step S7: The mesh semi-finished product is dried and cold-pressed to obtain a high-strength, antibacterial wave-shaped multi-fiber composite bed core material.

[0031] Comparative Example 4: This comparative example illustrates a method for preparing a high-strength, antibacterial, wave-shaped multi-fiber composite bed core material, comprising the following steps: Step S1: Add 1g of multi-walled carbon nanotubes XFM13 and 25mL of concentrated nitric acid with a mass fraction of 68% to a three-necked flask equipped with a stirrer, thermometer and gas delivery tube. Purge with nitrogen for protection and stir at 25℃ and 300r / min for 30min. Then raise the temperature to 90℃ and continue stirring for 6h. After the reaction is completed, cool the reaction product to room temperature and then filter under vacuum. Wash the filter cake with distilled water 5 times and then place it in a vacuum drying oven and dry at 80℃ for 3h to obtain acidified carbon nanotubes. Step S2: Add 0.8g of silver nitrate and 100mL of deionized water to a three-necked flask equipped with a stirrer, thermometer, and gas delivery tube. Purge with nitrogen for protection and stir at 25℃ and 300r / min for 30min. Then add 3g of acidified carbon nanotubes and 3.2g of trisodium citrate and continue stirring for 6h. After the reaction is complete, cool the reaction product to room temperature and then filter under vacuum. Place the filter cake in a vacuum drying oven and dry at 80℃ for 2h. Then place it in a muffle furnace and calcine at 260℃ for 2h. Then cool with the furnace to obtain silver-loaded carbon nanotubes. Step S3: Add 5g of silver-supported carbon nanotubes and 80mL of deionized water to a three-necked flask equipped with a stirrer and thermometer. Stir the mixture at 25℃ and 300r / min for 30min. Then adjust the pH to 9 with 10% sodium hydroxide solution. Add 0.63g of tris(hydroxymethyl)aminomethane hydrochloride and 0.2g of dopamine hydrochloride and continue stirring for 6h. After the reaction is complete, centrifuge the reaction product and wash the precipitate three times with distilled water. Then place it in a vacuum drying oven and dry it at 70℃ for 4h to obtain modified silver-supported carbon nanotubes. Step S4: Add 100g of CB-608S polyester chips and 3.5g of modified silver-loaded carbon nanotubes to an extruder, melt extrude, and spin into shape to obtain a high-strength antibacterial fiber with a diameter of 25μm. Step S5: Weigh out 40 parts jute fiber, 12 parts bamboo charcoal fiber, 25 parts long-staple cotton fiber, 15 parts wool fiber, and 35 parts high-strength antibacterial fiber according to the weight proportions, and set aside. Step S6: Mix jute fiber, bamboo charcoal fiber, long-staple cotton fiber, wool fiber and high-strength antibacterial fiber, then feed them into the medium opening machine for opening, and then lay the net using a vertical net laying equipment. The speed difference of the two belts makes the middle layer of each layer form multiple peaks, which are evenly arranged to form a wave-shaped cross-section structure of the net semi-finished product. Step S7: The mesh semi-finished product is dried and cold-pressed to obtain a high-strength, antibacterial wave-shaped multi-fiber composite bed core material.

[0032] The high-strength antibacterial wave-shaped multi-fiber composite bed core materials of Examples 1-3 and Comparative Examples 1-4 were subjected to performance tests, and the test results are shown in the table below:

[0033] Referring to the data in the table above, and based on the comparison between Examples 1-3 and Comparative Examples 1-4, it can be seen that adding high-strength antibacterial fibers containing epoxy quaternary ammonium compounds and modified silver-loaded carbon nanotubes can significantly improve the strength and antibacterial properties of the bed core material.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in this application, they should all fall within the protection scope of the present invention.

Claims

1. A high-strength, antibacterial, wave-shaped multi-fiber composite bed core material, characterized in that: Includes the following components by weight: 30-40 parts jute fiber, 8-12 parts bamboo charcoal fiber, 20-25 parts long-staple cotton fiber, 10-15 parts wool fiber, and 5-35 parts high-strength antibacterial fiber; The high-strength antibacterial fiber is prepared by the following steps: Polyester chips, epoxy quaternary ammonium compounds, and modified silver-loaded carbon nanotubes were added to an extruder, melt-extruded, and spun to obtain a high-strength antibacterial fiber with a diameter of 25 μm. The ratio of polyester chips, epoxy quaternary ammonium compounds, and modified silver-supported carbon nanotubes is 100g:1-7g:0.5-3.5g; the polyester chips are CB-608S polyester chips.

2. The high-strength antibacterial wave-shaped multi-fiber composite bed core material according to claim 1, characterized in that, The epoxy quaternary ammonium compound was prepared by the following steps: Step a1: Hydroquinone and glacial acetic acid are stirred and reacted, then liquid bromine is added dropwise. After the addition is complete, the reaction is stirred and reacted. After the reaction is completed, the reaction product is filtered under vacuum, and the filter cake is washed and dried to obtain polybrominated diphenol compounds. Step a2: The polybrominated diphenol compound, epichlorohydrin and tetrabutylammonium bromide were stirred and reacted. Then sodium hydroxide solution was added and the reaction was continued. After the reaction was completed, the reaction product was cooled and poured into dichloromethane. Then vacuum filtered, the filtrate was washed and dried, then vacuum filtered again, and the filtrate was evaporated by rotary evaporation to obtain the epoxy polybrominated compound. Step a3: The epoxy polybrominated compound, 3-methylpyridine and anhydrous acetonitrile were stirred and reacted. After the reaction was completed, the reaction product was cooled, then rotary evaporated, and then purified by silica gel column chromatography using a mixed solvent to obtain the epoxy quaternary ammonium compound.

3. The high-strength antibacterial wave-shaped multi-fiber composite bed core material according to claim 2, characterized in that, The ratio of hydroquinone, glacial acetic acid, and liquid bromine used in step a1 is 15 mmol: 20-25 mL: 70-75 mL.

4. The high-strength antibacterial wave-shaped multi-fiber composite bed core material according to claim 2, characterized in that, In step a2, the ratio of the polybrominated diphenol compound, epichlorohydrin, tetrabutylammonium bromide, and sodium hydroxide solution is 5g:50-60g:0.3-0.5g:18-22mL; the mass fraction of the sodium hydroxide solution is 20-25%.

5. The high-strength antibacterial wave-shaped multi-fiber composite bed core material according to claim 2, characterized in that, In step a3, the ratio of the epoxy polybrominated compound, 3-methylpyridine, and anhydrous acetonitrile is 10 mmol: 45-55 mmol: 50-60 mL; the mixed solvent is a mixture of methanol and dichloromethane in a volume ratio of 1-3:

8.

6. The high-strength antibacterial wave-shaped multi-fiber composite bed core material according to claim 1, characterized in that, The modified silver-supported carbon nanotubes were prepared by the following steps: Step b1: Carbon nanotubes and concentrated nitric acid are stirred and reacted. After the reaction is completed, the reaction product is cooled and then vacuum filtered. The filter cake is washed and dried to obtain acidified carbon nanotubes. Step b2: Silver nitrate and deionized water are stirred and reacted, then acidified carbon nanotubes and trisodium citrate are added and the reaction is continued. After the reaction is completed, the reaction product is cooled, then vacuum filtered, and the filter cake is dried and calcined to obtain silver-loaded carbon nanotubes. Step b3: Silver-supported carbon nanotubes and deionized water were stirred and reacted. Then, the pH was adjusted with sodium hydroxide solution. Tris(hydroxymethyl)aminomethane hydrochloride and dopamine hydrochloride were added and the reaction was continued with stirring. After the reaction was completed, the reaction product was centrifuged, and the precipitate was washed and dried to obtain modified silver-supported carbon nanotubes.

7. The high-strength antibacterial wave-shaped multi-fiber composite bed core material according to claim 6, characterized in that, In step b1, the ratio of carbon nanotubes to concentrated nitric acid is 1g:20-25mL; the carbon nanotubes are multi-walled carbon nanotubes (XFM13); and the mass fraction of the concentrated nitric acid is 66-68%.

8. The high-strength antibacterial wave-shaped multi-fiber composite bed core material according to claim 6, characterized in that, The ratio of silver nitrate, deionized water, acidified carbon nanotubes, and trisodium citrate used in step b2 is 0.2-0.8g: 90-100mL: 3g: 1.8-3.2g.

9. The high-strength antibacterial wave-shaped multi-fiber composite bed core material according to claim 6, characterized in that, In step b3, the ratio of silver-supported carbon nanotubes, deionized water, tris(hydroxymethyl)aminomethane hydrochloride, and dopamine hydrochloride is 5g:70-80mL:0.63g:0.2g; the mass fraction of the sodium hydroxide solution is 5-10%.

10. A method for preparing a high-strength antibacterial wave-shaped multi-fiber composite bed core material as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Weigh out 30-40 parts jute fiber, 8-12 parts bamboo charcoal fiber, 20-25 parts long-staple cotton fiber, 10-15 parts wool fiber, and 5-35 parts high-strength antibacterial fiber according to the weight proportions, and set aside. Step 2: Mix jute fiber, bamboo charcoal fiber, long-staple cotton fiber, wool fiber and high-strength antibacterial fiber, then feed them into the medium opening machine for opening, and then lay the net using a vertical net laying equipment. The speed difference of the two belts makes the middle layer of each layer form multiple peaks, which are evenly arranged to form a mesh semi-finished product with a wave-shaped cross-section structure. Step 3: The mesh semi-finished product is dried and cold-pressed to obtain a high-strength, antibacterial wave-shaped multi-fiber composite bed core material.

Images