Multifunctional composite jacquard fabric and preparation method thereof

Abstract

The invention relates to the technical field of textile fabrics, and discloses a multifunctional composite jacquard fabric and a preparation method thereof.The jacquard fabric is formed by weaving modified polyester fibers serving as warp and weft, and the modified polyester fibers are prepared by taking PET slices as a base material and taking polyester fibers as a base material; the invention relates to a cellulose antibacterial material which is prepared by adding an antibacterial modification component, a mechanical enhancement component, a dispersant, a surfactant, a lubricant and an antioxidant, the antibacterial modification component is prepared by introducing a chloromethyl group into a cellulose skeleton to form an intermediate, and then carrying out quaternization reaction on the intermediate and N, N-dimethylalkylamine. The mechanical enhancement component is prepared by introducing an epoxy functional group on a polyether-ether-ketone rigid chain, after high-temperature melt blending, the mechanical enhancement component, PET and cellulose form a stable cross-linked structure, the jacquard fabric is endowed with excellent mechanical properties such as high temperature resistance and wear resistance, and meanwhile, the fabric can be endowed with a long-acting antibacterial effect due to the addition of the antibacterial modification component.

Description

Technical Field

[0001] The invention belongs to the technical field of textile fabrics, and particularly relates to a multifunctional composite jacquard fabric and a preparation method thereof. Background Art

[0002] In the textile fabric sector, jacquard fabrics, thanks to their three-dimensional patterns, rich layering, and visually expressive textures created by warp and weft interweaving, are widely used in high-end apparel, home textiles, and decorative applications. As consumer demand escalates, the market places higher demands on fabric functionality. This is particularly true for applications such as medical, maternity, and sportswear. Jacquard fabrics with highly effective antimicrobial properties are becoming a necessity, not only inhibiting bacterial growth and reducing odor, but also enhancing safety and hygiene standards. However, existing technologies for producing antimicrobial jacquard fabrics still face significant bottlenecks in balancing functionality, durability, and performance.

[0003] The antibacterial function of existing antibacterial jacquard fabrics is mainly achieved through physical action, and its technical limitations are mainly reflected in the inherent defects of the physical attachment mechanism between the antibacterial components and the fibers. For example, the patent with the patent number CN113512797A discloses an antibacterial fabric, a weaving method for antibacterial fabrics and antibacterial sterilized clothing. The antibacterial fabric prepared by this patent achieves antibacterial function by introducing antibacterial yarns, but is limited by the yarn load capacity and physical mixing method, and has the technical defects of uneven distribution of antibacterial components and easy loss during washing or use, resulting in insufficient stability of the antibacterial effect; the patent with the patent number CN117299021A discloses wormwood essential oil microcapsules, cotton yarn and fabrics. This patent uses cyclodextrin microcapsules to embed wormwood essential oil. Although the antibacterial agent loading is achieved through the impregnation process, the cyclodextrin wall material has a high porosity, and the essential oil is easy to be lost during long-term storage. Volatility and escape cause continuous loss of antibacterial active ingredients. During washing, the microcapsules rupture due to mechanical stress, resulting in a sudden release of antibacterial agents. The antibacterial performance decays exponentially after multiple washes, and the microcapsules easily clog the pores of the fabric, reducing the air permeability, significantly affecting the comfort of the fabric in summer. Patent No. CN103167798A discloses an antimicrobial and antiviral composition containing cuprous oxide and a preparation method thereof. The antimicrobial fabric prepared by this patent has a low loading amount of cuprous oxide particles, which limits the antibacterial effect, poor bonding fastness due to surface synthesis, and easy to fall off, as well as a significant decrease in antibacterial performance after multiple washes. There are technical bottlenecks such as limited antibacterial efficacy, insufficient durability, and poor washability.

[0004] Based on this, in view of the complex organizational structure and high-frequency usage requirements of jacquard fabrics, it is urgent to develop a jacquard fabric with long-lasting antibacterial function and excellent mechanical properties. Summary of the Invention

[0005] The purpose of the present invention is to provide a multifunctional composite jacquard fabric and a preparation method thereof.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A multifunctional composite jacquard fabric is formed by weaving warp yarns and weft yarns; the warp yarns and weft yarns are both made of modified polyester fibers; the modified polyester fibers include the following raw materials in parts by weight: 30-35 parts of PET chips, 3-5 parts of antibacterial modification components, 3.5-5 parts of mechanical reinforcement components, 1-5 parts of dispersant, 3-7 parts of surfactant, 1-3 parts of lubricant, and 2-6 parts of antioxidant.

[0008] Furthermore, the preparation method of the antibacterial modified component comprises the following steps:

[0009] A1: Under nitrogen protection, add 50-70% by volume of toluene aqueous solution, microcrystalline cellulose, 4-chloromethylphenyl isocyanate, and triethylamine to a dry three-necked flask.

[0010] Add while stirring, then heat to 70-78 ° C and react for 8-9 hours, filter the reaction solution, wash, dry with anhydrous sodium sulfate, and then vacuum dry to obtain the intermediate, which is set aside;

[0011] A2: Under nitrogen protection, add 50-70% by volume ethanol aqueous solution to a dry three-necked flask, add the intermediate and N,N-dimethylalkylamine, and stir while adding. Then heat to 78-85°C and react for 4-5 hours. The reaction solution is filtered to collect the precipitate, washed with acetone, dried over anhydrous sodium sulfate, and then dried in a vacuum to obtain the antibacterial modified component.

[0012] Furthermore, in step A1, the mass ratio of the microcrystalline cellulose, 4-chloromethylphenyl isocyanate and triethylamine is 1:0.01-0.02:0.1-0.2.

[0013] Furthermore, in step A2, the N,N-dimethylalkylamine is any one of N,N-dimethyldodecylamine, N,N-dimethyltetradecylamine, N,N-dimethylhexadecylamine, and N,N-dimethyloctadecylamine.

[0014] Through the above technical solution, under the action of a catalyst, the hydroxyl groups in the cellulose skeleton can react with the isocyanic acid of 4-chloromethylphenylisocyanate to introduce chloromethyl groups into the cellulose to prepare an intermediate. The halogen substituents in its structure can further undergo a quaternization reaction with N,N-dimethylalkylamine to prepare a cellulose derivative containing a quaternary ammonium salt functional group in its structure, i.e., an antibacterial modified component.

[0015] Furthermore, the preparation method of the mechanical strengthening component comprises the following steps:

[0016] S1: Under nitrogen protection, polyetheretherketone is added to dimethyl sulfoxide, the temperature is raised to 180-185°C, stirred for 2-3 hours, then cooled to room temperature, sodium borohydride aqueous solution is added, and the reaction is stirred for 4-5 hours. The reaction solution is then filtered to remove insoluble matter, and the filtrate is concentrated and dried under vacuum conditions to obtain a reserve;

[0017] S2: Under nitrogen protection, add toluene into a three-necked flask, add epichlorohydrin, spare materials and catalyst, heat the mixture to 95-100°C, stir and react for 2-3 hours, then reduce the temperature to 80-85°C, add NaOH aqueous solution dropwise, continue to react at 85-85°C for 2-3 hours, concentrate under reduced pressure, collect the product, wash, remove impurities and vacuum dry to obtain the mechanical strengthening component.

[0018] Furthermore, in step S1, the mass fraction of the sodium borohydride aqueous solution is 10-30%.

[0019] Furthermore, in step S2, the catalyst is any one of benzyltriethylammonium chloride, trioctylmethylammonium chloride, and tetramethylammonium bromide; and the mass fraction of the NaOH aqueous solution is 45-50%.

[0020] Through the above technical solution, polyetheretherketone has excellent mechanical properties such as high temperature resistance, wear resistance, and tensile strength. Under the reduction of sodium borohydride, the ketone group in polyetheretherketone is reduced to hydroxyl group, and then undergoes etherification ring closing reaction with epichlorohydrin under catalytic conditions to obtain a mechanical reinforcement component. The epoxy functional group in this component serves as an active cross-linking site, which can undergo chain extension polymerization with PET and cellulose molecules in the subsequent process to form a covalent cross-linking network, thereby improving the mechanical properties of polyester fibers.

[0021] Furthermore, the dispersant is any one of calcium stearate and polyvinyl pyrrolidone; the surfactant is any one of stearic acid, oleic acid, and lauric acid; the lubricant is any one of hydroxy silicone oil and phenyl methyl silicone oil; and the antioxidant is any one of antioxidant 1010 and antioxidant 1076.

[0022] Furthermore, the preparation method of the modified polyester fiber comprises the following steps:

[0023] B1: Add dispersant, surfactant, lubricant and antioxidant into a high-speed mixer and mix to obtain a blend, which is then set aside;

[0024] B2: Add the mechanical enhancement component, antibacterial modification component, and PET chips into a high-speed mixer, premix them at room temperature, and then add them into a co-rotating twin-screw extruder. The materials are melted in the extruder to obtain a molten component.

[0025] B3: Add the blend to the molten components, place them in a twin-screw extruder to melt, mix and extrude the modified masterbatch;

[0026] B4: Place the modified masterbatch in a spinning machine and extrude it through a spinneret. The temperature of the melt spinning machine is 280-320°C, and then side-blown air is used for cooling to form nascent fibers.

[0027] B5: The spun fiber is stretched by hot rollers and then heated to set the fiber. The stretching temperature is 80-95℃, the stretching ratio is 3-4 times, and the setting temperature is 140-150℃.

[0028] B6: Twisting the shaped fibers to form a yarn cake with a twist of 50-60 T / m and a winding speed of 1000-2000 m / min to obtain modified polyester fibers.

[0029] Through the above technical solution, under high-temperature melting conditions, the epoxy groups in the mechanical reinforcement component containing polyetheretherketone undergo chain extension polymerization with PET chips and cellulose to form a stable cross-linked structure, and finally modified polyester fibers are produced under a variety of additive systems, which can realize the long-lasting antibacterial function of polyester fibers and improve mechanical properties such as high temperature resistance, wear resistance, and tensile resistance.

[0030] A method for preparing a multifunctional composite jacquard fabric comprises the following steps:

[0031] Step 1: Use the modified polyester fiber as the warp and weft yarns, wind them onto the warp beam and weft bobbin of the jacquard loom, start the jacquard warp knitting machine, and start weaving according to the designed floral pattern. Adjust the warp and weft density of the jacquard loom to 75-85 yarns / cm, and 125-130 yarns / cm. Set the speed of the jacquard warp knitting machine to 300-350 r / min.

[0032] Step 2: After weaving, the woven fabric is dyed at 80-85℃ for 1-2 hours, then dehydrated, and then dried at 160-180℃ for 30-40 seconds to obtain a multifunctional composite jacquard fabric.

[0033] Beneficial effects of the present invention:

[0034] (1) The present invention adopts chemical bonding technology to carry out chain extension polymerization of the antibacterial modified component containing quaternary ammonium salt antibacterial groups with the mechanical reinforcement component and PET chips in a high-temperature molten state, effectively avoiding the shedding of the antibacterial component during use, thereby extending the antibacterial time of the jacquard fabric and improving its market competitiveness.

[0035] (2) The present invention introduces epoxy functional groups into polyetheretherketone (PEEK) having excellent mechanical properties such as high temperature resistance and wear resistance, and reacts with PET end groups and cellulose to form a cross-linked network structure, thereby strengthening the interface bonding between PEEK and PET and cellulose skeletons, effectively inhibiting molecular chain slippage, and significantly improving the mechanical properties of polyester fibers such as tensile strength, high temperature resistance, and wear resistance.

[0036] (3) The present invention uses PET as the matrix, and forms high-performance polyester fibers through the blending and modification of antibacterial modified components and mechanical reinforcement components in collaboration with a variety of additive systems; then, through the physical texture design of the jacquard interwoven structure, the functional properties of the fibers are amplified, and finally a composite jacquard fabric with multifunctional properties such as antibacterial, tensile strength, high temperature resistance, and wear resistance is prepared.

[0037] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 This is the infrared spectrum of the antibacterial modified component in Example 1 of the present invention. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0041] Example 1

[0042] Preparation of modified polyester fiber:

[0043] B1: Add 1 part calcium stearate, 3 parts stearic acid, 1 part hydroxy silicone oil, and 2 parts antioxidant 1010, by weight, into a high-speed mixer at 800 rpm and mix for 30 minutes to obtain a blend, which is then set aside.

[0044] B2: 3.5 parts of mechanical reinforcement component, 3 parts of antibacterial modification component, and 30 parts of PET chips were added to a high-speed mixer and premixed at room temperature for 5 minutes. The mixture was then added to a co-rotating twin-screw extruder at a temperature of 280°C and a speed of 150 rpm. The materials were melted in the extruder to obtain a molten component.

[0045] B3: Add the blend to the molten components, place in a twin-screw extruder at a temperature of 280°C and a speed of 150 r / min to melt, mix and extrude the modified masterbatch;

[0046] B4: The modified masterbatch was placed in a melt spinning machine at a temperature of 280°C, a spinning speed of 3200 m / min, and a draft ratio of 1.73. The modified masterbatch was extruded through a 0.25 mm spinneret and then cooled by side blowing to form nascent fibers.

[0047] B5: The spun fiber is stretched by hot rollers at 80°C and a stretching ratio of 3 times, and then heat-set at 140°C;

[0048] B6: The shaped fiber is twisted to a twist of 50 T / m and a winding speed of 1000 m / min to form a yarn cake, thereby obtaining modified polyester fiber.

[0049] The preparation method of the antibacterial modified component comprises the following steps:

[0050] A1: Under nitrogen, add 100 mL of a 50% (volume fraction) toluene aqueous solution to a dry three-necked flask, add 10 g of microcrystalline cellulose, 0.1 g of 4-chloromethylphenylisocyanate, and 1 g of triethylamine, and stir while adding. Then, react at 70°C for 8 h. The reaction solution is filtered and washed, dried over anhydrous sodium sulfate, and then vacuum-dried at 60°C for 24 h to obtain an intermediate, which is set aside.

[0051] A2: Under nitrogen protection, 80 mL of 50% ethanol aqueous solution was added to a dry three-necked flask, followed by 5 g of the intermediate and 0.06 g of N,N-dimethyldodecylamine. The mixture was stirred and then reacted at 78°C for 5 h. The reaction solution was filtered to collect the precipitate, which was washed, dried over anhydrous sodium sulfate, and then vacuum-dried at 60°C for 12 h to obtain the antibacterial modified component.

[0052] The antibacterial modified components were characterized by infrared spectroscopy, such as Figure 1 As shown, 3356cm -1 The absorption peak of the unreacted hydroxyl groups in the cellulose skeleton is 3249 cm -1 The absorption peak of nitrogen-hydrogen bond is at 2952 cm -1 、2921cm -1 、2910cm -1The absorption peak of the carbon-hydrogen bond in the long-chain alkyl group appears at 3060 cm -1 The absorption peak of the carbon-hydrogen bond in the benzene ring appears at 1688 cm -1 The absorption peak of carbon-oxygen double bond appeared at 1615 cm -1 、1520cm -1 The absorption peak of the carbon-carbon bond in the benzene ring skeleton appears at 1461 cm -1 、1415cm -1 The absorption peak of the carbon-hydrogen bond in the quaternary amine group appeared at 1264 cm -1 The absorption peak of the carbon-nitrogen bond in the quaternary amine group appeared at 1075 cm -1 The absorption peak of the carbon-oxygen bond in the cellulose skeleton appeared at

[0053] The preparation method of the mechanical strengthening component comprises the following steps:

[0054] S1: Under nitrogen protection, add 10 g of polyetheretherketone to 50 mL of dimethyl sulfoxide, heat to 180°C, stir for 2 h, then cool to room temperature, add 10 mL of a 10% sodium borohydride aqueous solution, stir and react for 4 h, then filter the reaction solution to remove insoluble matter, and concentrate the filtrate under vacuum to dryness to obtain a reserve material;

[0055] S2: Under nitrogen protection, toluene was added to a three-necked flask, followed by the addition of 8 g of epichlorohydrin, 10 g of a spare material, and 1 g of tetrabutylammonium bromide. The mixture was heated to 95°C and stirred for 2 h. The temperature was then lowered to 80°C, and 10 mL of a 45% aqueous NaOH solution was added dropwise. The reaction was continued at 85°C for 2 h. After the reaction was completed, the product was extracted with toluene, washed with water until the pH value was neutral, and the solvent was removed by rotary evaporation. Solid impurities were removed by filtration, and the filtrate was concentrated and dried under vacuum conditions to obtain a mechanical reinforcement component.

[0056] Polyetheretherketone was purchased from Shanghai MacLean Biochemical Technology Co., Ltd. with product number P909312.

[0057] The epoxy value of the mechanical reinforcement component was determined using the hydrochloric acid-pyridine method. The specific steps are as follows: 2 g of sample was accurately weighed and placed in a 500 mL stoppered conical flask. 40 mL of hydrochloric acid-pyridine solution was accurately added. The sample was then fitted with a reflux condenser and placed in an oil bath. The flask was heated to reflux for 20 minutes at 128°C. After cooling, the condenser was rinsed with 15 mL of neutral acetone. Four to five drops of phenolphthalein indicator solution were added. The sample was titrated with 0.2 mol / L sodium hydroxide ethanol solution until a pink color was obtained. A blank test was also performed. The epoxy group content was calculated according to the following formula: V1 is the volume of sodium hydroxide standard solution consumed in the blank test (mL); V2 is the volume of sodium hydroxide standard solution consumed in the sample test (mL); C is the concentration of the sodium hydroxide standard solution (mol / L); and M is the sample weight (g). The epoxy group content of the mechanical reinforcement component was determined to be 3.534 mmol / g, indicating that epoxy groups were successfully introduced into the polyetheretherketone backbone. The calculation formula is [(V1 - V2) × C] / 1000M.

[0058] Example 2

[0059] Preparation of modified polyester fiber:

[0060] B1: Add 2 parts of calcium stearate, 5 parts of stearic acid, 2 parts of hydroxy silicone oil, and 3 parts of antioxidant 1010, by weight, into a high-speed mixer at 800 rpm and mix for 30 minutes to obtain a blend, which is then set aside.

[0061] B2: 4.5 parts of mechanical reinforcement component, 4 parts of antibacterial modification component, and 32 parts of PET chips were added to a high-speed mixer and premixed at room temperature for 5 minutes. The mixture was then added to a co-rotating twin-screw extruder at a temperature of 280°C and a speed of 150 rpm. The materials were melted in the extruder to obtain a molten component.

[0062] B3: Add the blend to the molten components, place in a twin-screw extruder at a temperature of 280°C and a speed of 150 r / min to melt, mix and extrude the modified masterbatch;

[0063] B4: The modified masterbatch was placed in a melt spinning machine at a temperature of 290°C, a spinning speed of 3200 m / min, and a draft ratio of 1.73. The modified masterbatch was extruded through a 0.25 mm spinneret and then cooled by side blowing to form nascent fibers.

[0064] B5: The spun fiber is stretched by hot rollers at 85°C and a stretching ratio of 4 times, and then heat-set at 145°C;

[0065] B6: The shaped fibers are twisted to a twist of 55 T / m and a winding speed of 1500 m / min to form a yarn cake, thereby obtaining modified polyester fibers.

[0066] The preparation methods of the antibacterial modification component and the mechanical enhancement component are the same as those in Example 1.

[0067] Example 3

[0068] Preparation of modified polyester fiber:

[0069] B1: Add 5 parts of calcium stearate, 7 parts of stearic acid, 3 parts of hydroxy silicone oil, and 6 parts of antioxidant 1010, by weight, into a high-speed mixer at 800 rpm and mix for 30 minutes to obtain a blend, which is then set aside.

[0070] B2: Add 5 parts of mechanical reinforcement component, 5 parts of antibacterial modification component, and 35 parts of PET chips into a high-speed mixer and premix at room temperature for 5 minutes. Then, add the mixture into a co-rotating twin-screw extruder at a temperature of 280°C and a speed of 150 rpm. Melt the materials in the extruder to obtain a molten component.

[0071] B3: Add the blend to the molten components, place in a twin-screw extruder at a temperature of 280°C and a speed of 150 r / min to melt, mix and extrude the modified masterbatch;

[0072] B4: The modified masterbatch was placed in a melt spinning machine at a temperature of 320°C, a spinning speed of 3200 m / min, and a draft ratio of 1.73. The modified masterbatch was extruded through a 0.25 mm spinneret and then cooled by side blowing to form nascent fibers.

[0073] B5: The spun fiber is stretched by hot rollers at 95°C and a stretching ratio of 4 times, and then heat-set at 150°C;

[0074] B6: The shaped fiber is twisted to a twist of 60 T / m and a winding speed of 2000 m / min to form a yarn cake, thereby obtaining modified polyester fiber.

[0075] The preparation methods of the antibacterial modification component and the mechanical enhancement component are the same as those in Example 1.

[0076] Comparative Example 1

[0077] Preparation of modified polyester fiber:

[0078] B1: Add 2 parts of calcium stearate, 5 parts of stearic acid, 2 parts of hydroxy silicone oil, and 3 parts of antioxidant 1010, by weight, into a high-speed mixer at 800 rpm and mix for 30 minutes to obtain a blend, which is then set aside.

[0079] B2: 4.5 parts of mechanical reinforcement component, 4 parts of butyltrimethylammonium chloride, and 32 parts of PET chips were added to a high-speed mixer and premixed at room temperature for 5 minutes. The mixture was then added to a co-rotating twin-screw extruder at a temperature of 280°C and a speed of 150 rpm. The materials were melted in the extruder to obtain a molten component.

[0080] B3: Add the blend to the molten components, place in a twin-screw extruder at a temperature of 280°C and a speed of 150 r / min to melt, mix and extrude the modified masterbatch;

[0081] B4: The modified masterbatch was placed in a melt spinning machine at a temperature of 290°C, a spinning speed of 3200 m / min, and a draft ratio of 1.73. The modified masterbatch was extruded through a 0.25 mm spinneret and then cooled by side blowing to form nascent fibers.

[0082] B5: The spun fiber is stretched by hot rollers at 85°C and a stretching ratio of 4 times, and then heat-set at 145°C;

[0083] B6: The shaped fibers are twisted to a twist of 55 T / m and a winding speed of 1500 m / min to form a yarn cake, thereby obtaining modified polyester fibers.

[0084] The preparation method of the mechanical strengthening component is the same as that in Example 1.

[0085] Comparative Example 2

[0086] Preparation of modified polyester fiber:

[0087] B1: Add 2 parts of calcium stearate, 5 parts of stearic acid, 2 parts of hydroxy silicone oil, and 3 parts of antioxidant 1010, by weight, into a high-speed mixer at 800 rpm and mix for 30 minutes to obtain a blend, which is then set aside.

[0088] B2: 4.5 parts of mechanical reinforcement component and 32 parts of PET chips were added to a high-speed mixer and premixed at room temperature for 5 minutes. The mixture was then added to a co-rotating twin-screw extruder at a temperature of 280°C and a speed of 150 rpm. The materials were melted in the extruder to obtain a molten component.

[0089] B3: Add the blend to the molten components, place in a twin-screw extruder at a temperature of 280°C and a speed of 150 r / min to melt, mix and extrude the modified masterbatch;

[0090] B4: The modified masterbatch was placed in a melt spinning machine at a temperature of 290°C, a spinning speed of 3200 m / min, and a draft ratio of 1.73. The modified masterbatch was extruded through a 0.25 mm spinneret and then cooled by side blowing to form nascent fibers.

[0091] B5: The spun fiber is stretched by hot rollers at 85°C and a stretching ratio of 4 times, and then heat-set at 145°C;

[0092] B6: The shaped fibers are twisted to a twist of 55 T / m and a winding speed of 1500 m / min to form a yarn cake, thereby obtaining modified polyester fibers.

[0093] The preparation method of the mechanical strengthening component is the same as that in Example 1.

[0094] Comparative Example 3

[0095] Preparation of modified polyester fiber:

[0096] B1: Add 2 parts of calcium stearate, 5 parts of stearic acid, 2 parts of hydroxy silicone oil, and 3 parts of antioxidant 1010, by weight, into a high-speed mixer at 800 rpm and mix for 30 minutes to obtain a blend, which is then set aside.

[0097] B2: 4 parts of the antibacterial modified component and 32 parts of PET chips were added to a high-speed mixer and premixed at room temperature for 5 minutes. The mixture was then added to a co-rotating twin-screw extruder at a temperature of 280°C and a speed of 150 rpm. The materials were melted in the extruder to obtain a molten component.

[0098] B3: Add the blend to the molten components, place in a twin-screw extruder at a temperature of 280°C and a speed of 150 r / min to melt, mix and extrude the modified masterbatch;

[0099] B4: The modified masterbatch was placed in a melt spinning machine at a temperature of 290°C, a spinning speed of 3200 m / min, and a draft ratio of 1.73. The modified masterbatch was extruded through a 0.25 mm spinneret and then cooled by side blowing to form nascent fibers.

[0100] B5: The spun fiber is stretched by hot rollers at 85°C and a stretching ratio of 4 times, and then heat-set at 145°C;

[0101] B6: The shaped fibers are twisted to a twist of 55 T / m and a winding speed of 1500 m / min to form a yarn cake, thereby obtaining modified polyester fibers.

[0102] The preparation method of the antibacterial modified component is the same as that in Example 1.

[0103] Comparative Example 4

[0104] Preparation of modified polyester fiber:

[0105] B1: Add 2 parts of calcium stearate, 5 parts of stearic acid, 2 parts of hydroxy silicone oil, and 3 parts of antioxidant 1010, by weight, into a high-speed mixer at 800 rpm and mix for 30 minutes to obtain a blend, which is then set aside.

[0106] B2: Add 32 parts of PET chips to a high-speed mixer and premix them at room temperature for 5 minutes. Then, add them to a co-rotating twin-screw extruder at a temperature of 280°C and a speed of 150 rpm. Melt the materials in the extruder to obtain a molten component.

[0107] B3: Add the blend to the molten components, place in a twin-screw extruder at a temperature of 280°C and a speed of 150 r / min to melt, mix and extrude the modified masterbatch;

[0108] B4: The modified masterbatch was placed in a melt spinning machine at a temperature of 290°C, a spinning speed of 3200 m / min, and a draft ratio of 1.73. The modified masterbatch was extruded through a 0.25 mm spinneret and then cooled by side blowing to form nascent fibers.

[0109] B5: The spun fiber is stretched by hot rollers at 85°C and a stretching ratio of 4 times, and then heat-set at 145°C;

[0110] B6: The shaped fibers are twisted to a twist of 55 T / m and a winding speed of 1500 m / min to form a yarn cake, thereby obtaining modified polyester fibers.

[0111] Polyester fiber performance testing

[0112] Performance testing of breaking strength and elongation at break: The polyester fibers prepared in Examples 1 to 3 and Comparative Examples 1 to 4 were tested for breaking strength and elongation at break in accordance with the standard GB / T 14337-2008, "Test Method for Tensile Properties of Chemical Staple Fibers." The breaking strength and elongation at break of the polyester fibers prepared in Examples 1 to 3 and Comparative Examples 1 to 4 were recorded as Q1. The samples were placed in an environment at 180°C and tested for breaking strength again, with the breaking strength recorded as Q2. The breaking strength loss rate of the polyester samples at high temperature was calculated using the formula (Q1-Q2) / Q1×100%, verifying the high temperature resistance of the polyester fibers prepared in Examples 1 to 3 and Comparative Examples 1 to 4. The test results are shown in the following table:

[0113] Breaking strength / cN / dtex Loss rate / % Elongation at break / % Example 1 8.4 2.4 92.8 Example 2 8.7 2.2 94.6 Example 3 8.3 2.5 92.4 Comparative Example 1 6.3 2.7 81.3 Comparative Example 2 6.1 2.9 80.2 Comparative Example 3 5.4 3.4 74.3 Comparative Example 4 5.2 3.6 73.6

[0114] The data in the table above show that the polyester fibers prepared in Examples 1-3 exhibit superior tensile strength, fracture resistance, and high-temperature resistance. This is due to the addition of mechanical reinforcement components and antimicrobial modification components to the polyester fibers, which introduce a polyetheretherketone structure into the polyester fibers, forming a cross-linked network structure with PET and cellulose, significantly enhancing the mechanical properties of the polyester fibers. Comparative Examples 1-2 exhibit better tensile strength, fracture resistance, and high-temperature resistance than Comparative Examples 3-4, due to the absence of mechanical reinforcement components in Comparative Examples 3-4. Furthermore, Comparative Example 4, which lacks an antimicrobial modification component, exhibits the worst tensile strength, fracture resistance, and high-temperature resistance.

[0115] The modified polyester fibers in Examples 1 to 3 and Comparative Examples 1 to 4 were used to prepare multifunctional composite jacquard fabrics. The specific preparation steps are as follows:

[0116] Step 1: The modified polyester fiber prepared in Example 1 was used as the warp and weft yarns, wound onto the warp beam and weft bobbin of the jacquard loom, and the jacquard warp knitting machine was started to weave according to the designed floral pattern. The warp and weft densities of the jacquard loom were adjusted to 80 yarns / cm and 127 yarns / cm, and the speed of the jacquard warp knitting machine was set to 320 r / min.

[0117] Step 2: After weaving, the woven fabric is dyed at 83°C for 1.5 hours, dehydrated, and then dried at 170°C for 35 seconds to obtain a multifunctional composite jacquard fabric.

[0118] Fabric performance testing

[0119] The fabrics prepared in Examples 1 to 3 and Comparative Examples 1 to 4 were cut into test specimens that met the specifications. The antibacterial properties of the unwashed samples and the samples after washing 30 times were tested in accordance with the national standard GB / T 20944.3-2008 "Evaluation of Antimicrobial Properties of Textiles Part 3: Oscillation Method". Staphylococcus aureus and Escherichia coli were selected as the test bacteria. The washing method was operated according to the washing method of the color fastness tester in GB / T 20944.3-2008. The abrasion resistance was tested according to GB / T 21196.2-2007. The results of 5 parallel experiments were averaged. The test results are shown in the following table:

[0120]

[0121] The data in the table above show that the jacquard fabrics prepared in Examples 1-3 and Comparative Example 3 still exhibited good antibacterial activity after 30 washes. This indicates that incorporating the quaternary ammonium salt antibacterial groups into the cellulose backbone prevents the antibacterial components from falling off during use, extending the antibacterial lifespan of the jacquard fabric and achieving long-lasting antibacterial activity. Comparative Examples 2 and 4, which do not contain antibacterial modifying components, exhibited only moderate antibacterial activity. The antibacterial activity of Comparative Example 1 significantly decreased after 30 washes, indicating that the loss of the quaternary ammonium salt antibacterial active components significantly reduced the antibacterial effectiveness of the fabric.

[0122] The fabrics prepared in Examples 1 to 3 and Comparative Examples 1 and 2 have good wear resistance; Comparative Examples 3 and 4 do not add mechanical reinforcement components, so their wear resistance performance is average; this shows that the mechanical reinforcement component made of polyetheretherketone forms a stable cross-linked structure with PET chips and cellulose, which can strengthen the interface bonding and improve the mechanical properties.

[0123] The above content is merely an example and explanation of the concept of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A multifunctional composite jacquard fabric, characterized in that: The invention is formed by weaving warp yarn and weft yarn; the warp yarn and weft yarn are both made of modified polyester fiber; the modified polyester fiber comprises the following raw materials in parts by weight: 30-35 parts of PET chips, 3-5 parts of antibacterial modification components, 3.5-5 parts of mechanical reinforcement components, 1-5 parts of dispersant, 3-7 parts of surfactant, 1-3 parts of lubricant, and 2-6 parts of antioxidant.

2. The multifunctional composite jacquard fabric according to claim 1, characterized in that: The preparation method of the antibacterial modified component comprises the following steps: A1: Under nitrogen, add 50-70% by volume toluene aqueous solution to a dry three-necked flask, add microcrystalline cellulose, 4-chloromethylphenyl isocyanate, and triethylamine, and stir while adding. Then heat to 70-78°C and react for 8-9 hours. The reaction solution is filtered, washed, dried over anhydrous sodium sulfate, and then vacuum-dried to obtain an intermediate, which is set aside. A2: Under nitrogen protection, add 50-70% by volume ethanol aqueous solution to a dry three-necked flask, add the intermediate and N,N-dimethylalkylamine, and stir while adding. Then heat to 78-85°C and react for 4-5 hours. The reaction solution is filtered to collect the precipitate, which is washed, dried over anhydrous sodium sulfate, and then vacuum-dried to obtain the antibacterial modified component.

3. The multifunctional composite jacquard fabric according to claim 2, characterized in that: In step A1, the mass ratio of the microcrystalline cellulose, 4-chloromethylphenyl isocyanate and triethylamine is 1:0.01-0.02:0.1-0.

2.

4. The multifunctional composite jacquard fabric according to claim 2, characterized in that: In step A2, the N,N-dimethylalkylamine is any one of N,N-dimethyldodecylamine, N,N-dimethyltetradecylamine, N,N-dimethylhexadecylamine, and N,N-dimethyloctadecylamine.

5. The multifunctional composite jacquard fabric according to claim 1, characterized in that: The preparation method of the mechanical strengthening component comprises the following steps: S1: Under nitrogen protection, polyetheretherketone is added to dimethyl sulfoxide, the temperature is raised to 180-185°C, stirred for 2-3 hours, then cooled to room temperature, sodium borohydride aqueous solution is added, and the reaction is stirred for 4-5 hours. The reaction solution is then filtered to remove insoluble matter, and the filtrate is concentrated and dried under vacuum conditions to obtain a reserve; S2: Under nitrogen protection, add toluene into a three-necked flask, add epichlorohydrin, spare materials and catalyst, heat the mixture to 95-100°C, stir and react for 2-3 hours, then reduce the temperature to 80-85°C, add NaOH aqueous solution dropwise, continue to react for 2-3 hours, concentrate under reduced pressure, collect the product, wash, remove impurities and vacuum dry to obtain the mechanical strengthening component.

6. The multifunctional composite jacquard fabric according to claim 5, characterized in that: In step S1, the mass fraction of the sodium borohydride aqueous solution is 10-30%.

7. The multifunctional composite jacquard fabric according to claim 5, characterized in that: In step S2, the catalyst is any one of benzyltriethylammonium chloride, trioctylmethylammonium chloride, and tetramethylammonium bromide; and the mass fraction of the NaOH aqueous solution is 45-50%.

8. The multifunctional composite jacquard fabric according to claim 1, characterized in that: The dispersant is any one of calcium stearate and polyvinyl pyrrolidone; the surfactant is any one of stearic acid, oleic acid, and lauric acid; the lubricant is any one of hydroxy silicone oil and phenyl methyl silicone oil; and the antioxidant is any one of antioxidant 1010 and antioxidant 1076.

9. The multifunctional composite jacquard fabric according to claim 1, characterized in that: The preparation method of the modified polyester fiber comprises the following steps: B1: Add dispersant, surfactant, lubricant and antioxidant into a high-speed mixer and mix to obtain a blend, which is then set aside; B2: Add the mechanical enhancement component, antibacterial modification component, and PET chips into a high-speed mixer, premix them at room temperature, and then add them into a co-rotating twin-screw extruder. The materials are melted in the extruder to obtain a molten component. B3: Add the blend to the molten components, place them in a twin-screw extruder to melt, mix and extrude the modified masterbatch; B4: Place the modified masterbatch in a spinning machine and extrude it through a spinneret. The temperature of the melt spinning machine is 280-320°C, and then side-blown air is used for cooling to form nascent fibers. B5: The spun fiber is stretched by hot rollers and then heated to set the fiber. The stretching temperature is 80-95℃, the stretching ratio is 3-4 times, and the setting temperature is 140-150℃. B6: Twisting the shaped fibers to form a yarn cake with a twist of 50-60 T / m and a winding speed of 1000-2000 m / min to obtain modified polyester fibers.

10. A method for preparing the multifunctional composite jacquard fabric according to claim 1, characterized in that: The following steps are involved: Step 1: Use the modified polyester fiber as the warp and weft yarns, wind them onto the warp beam and weft bobbin of the jacquard loom, start the jacquard warp knitting machine, and start weaving according to the designed floral pattern. Adjust the warp and weft density of the jacquard loom to 75-85 yarns / cm, and 125-130 yarns / cm. Set the speed of the jacquard warp knitting machine to 300-350 r / min. Step 2: After weaving, the woven fabric is dyed at 80-85℃ for 1-2 hours, then dehydrated, and then dried at 160-180℃ for 30-40 seconds to obtain a multifunctional composite jacquard fabric.

Images