Functional fabric based on laser carving microstructure synergy and preparation method thereof

Abstract

The invention provides a functional fabric based on laser carving microstructure synergy and a preparation method thereof, and belongs to the technical field of textile fabric processing. The method comprises the following steps: S1, fabric preparation: blending cotton fibers, polyester fibers and bamboo fibers to obtain cotton / polyester / bamboo blended yarns, and weaving to obtain a to-be-treated fabric for later use; s2, laser carving: S2.1, designing a laser carving pattern; s2.2, setting operation parameters of the laser equipment; s2.3, the position of the pattern on the fabric is adjusted, and laser carving is conducted; and S3, post-processing. According to the method, a micro-concave, edge-covering and microporous composite physical structure is constructed on the surface of the cotton / polyester / blended fabric through the laser technology and serves as a physical anchoring point, and meanwhile, the chemical bonding effect is combined, so that the binding strength and washing resistance of antibacterial substances on the surface of the fabric are synergistically improved.

Description

Technical Field

[0001] This invention relates to the field of textile fabric processing technology, specifically to a functional fabric based on laser-engraved microstructure synergy and its preparation method. Background Technology

[0002] Laser engraving technology refers to a technique that uses controlled laser power, scanning speed, and motion trajectory to rapidly heat materials and create three-dimensional patterns on their surfaces. Laser engraving boasts advantages such as high power concentration, good directionality, low energy consumption, automation, stability, high precision, non-contact processing, and environmental friendliness. After the pattern or shape is drawn on computer software, the recognizable file is imported into the computer connected to the laser device. The textile to be processed is aligned with the laser engraving equipment, the appropriate operating parameters are set, and laser engraving begins. Based on these advantages, laser engraving technology is widely used for surface treatment of various materials such as metals, textiles, and leather. In textiles, the application of laser engraving technology primarily involves rapidly heating the fabric surface, causing the fibers or dyes in the heated areas to vaporize, melt, or carbonize at high temperatures, forming the preset engraved pattern.

[0003] The development of functional textile fabrics has long faced the core contradiction of the incompatibility between functionality and durability. Existing technologies primarily address this through methods such as coating or impregnation to attach functional materials to the fabric surface. However, this method relies mainly on physical adsorption, resulting in poor adhesion to the substrate and easy detachment after repeated washing, failing to meet long-term usage requirements. Another approach involves directly embedding functional materials into the fibers. While this method yields better wash resistance, it is complex, costly, and offers limited functionality, failing to meet consumers' diverse needs for functional fabrics. Summary of the Invention

[0004] This invention provides a functional fabric based on laser-engraved microstructure synergy and its preparation method. This invention uses laser technology to construct a composite physical structure of micro-concave, edge binding and micropore on the surface of cotton / polyester / blended fabric as physical anchoring points. At the same time, combined with chemical bonding, it synergistically improves the binding strength of antibacterial substances on the fabric surface and the water resistance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention provides a method for preparing functional fabrics based on laser-engraved microstructure synergy, comprising the following steps:

[0007] S1. Fabric preparation: Cotton fiber, polyester fiber and bamboo fiber are blended to obtain cotton / polyester / bamboo blended yarn, which is then woven to obtain the fabric to be processed and set aside.

[0008] S2, Laser Engraving:

[0009] S2.1 Design laser-engraved patterns;

[0010] S2.2, Set the operating parameters of the laser equipment;

[0011] S2.3 Adjust the position of the pattern on the fabric and perform laser engraving;

[0012] S3, Post-processing:

[0013] The laser-engraved fabric is first immersed in an aqueous solution of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane to obtain an ammoniated fabric; then the ammoniated fabric is immersed in an antibacterial microcapsule finishing solution, with three dips and three slits, a slit rate of 70-100%, heat treatment, washing, and drying to obtain a functional fabric.

[0014] The method for preparing the antibacterial microcapsules includes the following steps:

[0015] Methyl methacrylate, ethylene glycol dimethacrylate (EGDMA), acrylic acid, allyl glycidyl ether, polyvinylpyrrolidone (PVP), and 4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT) were mixed evenly to obtain a mixture. Then, a certain proportion of deionized water was added to the mixture, and the system temperature was controlled at 40-55℃. After homogenization, potassium persulfate and sodium dodecylbenzenesulfonate were added sequentially, and the system temperature was raised to 60-85℃. The mixture was stirred for 12-36 hours, centrifuged, and washed three times repeatedly with ethanol and petroleum ether. After washing, the mixture was freeze-dried to obtain antibacterial microcapsules.

[0016] Furthermore, the mass ratio of cotton fiber, polyester fiber and bamboo fiber in step S1 is 3-7:1-2:1-5.5.

[0017] Furthermore, the laser engraving mode described in step S2 is dot matrix engraving.

[0018] Furthermore, the operating parameters of the laser equipment described in step S2.2 are as follows: (1) Resolution (dpi): grating axis 100-180, vertical axis 300-600; (2) processing speed 13000-15000mm / s, jump speed 13000-15000mm / s; (3) jump delay 1000μs, light-on delay 800μs.

[0019] Furthermore, in step S3, the mass ratio of methyl methacrylate, ethylene glycol dimethacrylate (EGDMA), acrylic acid, and allyl glycidyl ether is 50-80:1-5:1-5:3-10.

[0020] Furthermore, the amount of polyvinylpyrrolidone (PVP) added in step S3 accounts for 1-5% of the total mass of the aqueous phase.

[0021] Furthermore, the amount of 4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT) added in step S3 accounts for 10-40% of the total solids content.

[0022] Furthermore, the mass ratio of the mixture to deionized water is 1:20-30.

[0023] Furthermore, the amount of potassium persulfate added in step S3 accounts for 0.2-1.0 wt% of the total monomer; the amount of sodium dodecylbenzenesulfonate added in step S3 is equivalent to 0.1-1.0% of the total mass of the aqueous phase.

[0024] Furthermore, the concentration of the N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane aqueous solution in step S3 is 10-30 g / L; the concentration of the antibacterial microcapsule finishing solution in step S3 is 20-40 g / L.

[0025] Furthermore, in step S3, the heat treatment temperature is 90-100℃ and the heat treatment time is 3-5 minutes.

[0026] Furthermore, the drying temperature in step S3 is 70-80℃, and the drying time is 20-50 min.

[0027] The present invention also provides a functional fabric based on laser-engraved microstructure synergy prepared by the method, and the application of the functional fabric based on laser-engraved microstructure synergy in the fields of medical, nursing, home and pet products.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] In this invention, polyester is melted after laser treatment and cooled to form a smooth edge, while its color lightens. Cotton and bamboo fibers are vaporized and removed under laser ablation to form microstructure pits. The micropores of the bamboo fibers and the laser micropits form a micro-nano composite anchoring structure. This micro-nano composite anchoring structure is suitable for fixing a variety of functional materials, such as temperature-sensitive powder and antibacterial microcapsule powder, and has good versatility and scalability.

[0030] This invention treats the fabric with an aqueous solution of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, followed by treatment with a self-made antibacterial microcapsule finishing solution. In this process, the silanol groups on the N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane undergo a condensation reaction with the hydroxyl groups on the fabric, forming chemical bonds. The amino groups on the N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane undergo a ring-opening reaction with the epoxy groups on the surface of the antibacterial microcapsules, forming strong chemical bonds. Simultaneously, the epoxy groups on the surface of the antibacterial microcapsules react with the hydroxyl groups on the fabric to form covalent bonds, significantly improving the adhesion of the antibacterial substance to the fabric surface. This invention combines laser-engraved physical anchoring and chemical grafting modification techniques, significantly enhancing the bonding strength and wash resistance of the antibacterial substance to the fabric surface. Detailed Implementation

[0031] This invention provides a method for preparing functional fabrics based on laser-engraved microstructure synergy, comprising the following steps:

[0032] S1. Fabric preparation: Cotton fiber, polyester fiber and bamboo fiber are blended to obtain cotton / polyester / bamboo blended yarn, which is then woven to obtain the fabric to be processed and set aside.

[0033] S2, Laser Engraving:

[0034] S2.1 Design laser-engraved patterns;

[0035] S2.2, Set the operating parameters of the laser equipment;

[0036] S2.3 Adjust the position of the pattern on the fabric and perform laser engraving;

[0037] S3, Post-processing:

[0038] The laser-engraved fabric is first immersed in an aqueous solution of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane at a liquor ratio of 1:8-10 to obtain an ammoniated fabric. Subsequently, the ammoniated fabric is immersed in an antibacterial microcapsule finishing solution at a liquor ratio of 1:10-15, with three dips and three nips, a nip-out ratio of 70-100%, followed by heat treatment, washing, and drying to obtain a functional fabric.

[0039] The method for preparing the antibacterial microcapsules includes the following steps:

[0040] Methyl methacrylate, ethylene glycol dimethacrylate (EGDMA), acrylic acid, allyl glycidyl ether, polyvinylpyrrolidone (PVP), and 4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT) were mixed evenly to obtain a mixture. Then, a certain proportion of deionized water was added to the mixture, and the system temperature was controlled at 40-55℃. After homogenization, potassium persulfate and sodium dodecylbenzenesulfonate were added sequentially, and the system temperature was raised to 60-85℃. The mixture was stirred for 12-36 hours, centrifuged, and washed three times repeatedly with ethanol and petroleum ether. After washing, the mixture was freeze-dried to obtain antibacterial microcapsules.

[0041] During the study, it was found that the epoxy groups did not react with the reagents used during the microcapsule encapsulation process, meaning that epoxy groups were present on the surface of the prepared antibacterial microcapsules.

[0042] In some embodiments of the present invention, the mass ratio of cotton fiber, polyester fiber and bamboo fiber in step S1 is 3-7:1-2:1-5.5.

[0043] In some embodiments of the present invention, the device for laser engraving in step S2 is a carbon dioxide laser.

[0044] In some embodiments of the present invention, the laser engraving mode in step S2 is dot matrix engraving.

[0045] In some embodiments of the present invention, the operating parameters of the laser device in step S2.2 are as follows: (1) resolution (dpi): grating axis 100-180, vertical axis 300-600; (2) processing speed 13000-15000mm / s, jump speed 13000-15000mm / s; (3) jump delay 1000μs, light-on delay 800μs.

[0046] Preferably, the operating parameters of the laser equipment in step S2.2 are as follows: (1) Resolution (dpi): grating axis 120-150, vertical axis 400-500; (2) processing speed 13000-14000mm / s, jump speed 12000-15000mm / s; (3) jump delay 1000μs, light-on delay 800μs.

[0047] More preferably, the operating parameters of the laser equipment in step S2.2 are as follows: (1) resolution (dpi): grating axis 130, vertical axis 450; (2) processing speed 12000mm / s, jump speed 13000mm / s; (3) jump delay 1000μs, light-on delay 800μs.

[0048] In some embodiments of the present invention, the mass ratio of methyl methacrylate, ethylene glycol dimethacrylate (EGDMA), acrylic acid, and allyl glycidyl ether in step S3 is 50-80:1-5:1-5:3-10.

[0049] Preferably, the mass ratio of methyl methacrylate, ethylene glycol dimethacrylate (EGDMA), acrylic acid, and allyl glycidyl ether in step S3 is 55-70:1-3:3-5:6-8.

[0050] More preferably, the mass ratio of methyl methacrylate, ethylene glycol dimethacrylate (EGDMA), acrylic acid, and allyl glycidyl ether in step S3 is 60:2:4:7.

[0051] In some embodiments of the present invention, the amount of polyvinylpyrrolidone (PVP) added in step S3 accounts for 1-5% of the total mass of the aqueous phase. Preferably, the amount of polyvinylpyrrolidone (PVP) added in step S3 accounts for 1-3% of the total mass of the aqueous phase. More preferably, the amount of polyvinylpyrrolidone (PVP) added in step S3 accounts for 2% of the total mass of the aqueous phase.

[0052] In some embodiments of the present invention, the amount of 4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT) added in step S3 accounts for 10-40% of the total solids content. Preferably, the amount of 4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT) added in step S3 accounts for 15-30% of the total solids content. More preferably, the amount of 4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT) added in step S3 accounts for 28% of the total solids content.

[0053] In this invention, the total solids content specifically refers to the total amount of all solid substances in the final microcapsule. By limiting the amount of 4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT) added within the above-mentioned range, this invention ensures both sufficient antibacterial active ingredients and sufficient strength and integrity of the wall material to cover the core material, thereby contributing to improved sustained release and water resistance of the functional substances. Below the above range, the antibacterial performance is insufficient; above the above range, the microcapsule structure becomes partially unstable, and the encapsulation effect is poor, which may lead to leakage of the core material and loss of antibacterial function.

[0054] The 4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT) used in this invention is biodegradable and environmentally friendly and safe.

[0055] In some embodiments of the present invention, the mass ratio of the mixture to deionized water is 1:20-30. Preferably, the mass ratio of the mixture to deionized water is 1:25.

[0056] In some embodiments of the present invention, the amount of potassium persulfate added in step S3 accounts for 0.2-1.0 wt% of the total monomer. Preferably, the amount of potassium persulfate added in step S3 accounts for 0.2-0.8 wt% of the total monomer. More preferably, the amount of potassium persulfate added in step S3 accounts for 0.5 wt% of the total monomer.

[0057] In some embodiments of the present invention, the amount of sodium dodecylbenzenesulfonate added in step S3 is equivalent to 0.1-1.0% of the total mass of the aqueous phase. Preferably, the amount of sodium dodecylbenzenesulfonate added in step S3 is equivalent to 0.1-0.3% of the total mass of the aqueous phase. More preferably, the amount of sodium dodecylbenzenesulfonate added in step S3 is equivalent to 0.2% of the total mass of the aqueous phase.

[0058] In this invention, the total mass of the aqueous phase refers to the mass of the added deionized water.

[0059] In some embodiments of the present invention, the concentration of the N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane aqueous solution in step S3 is 10-30 g / L. Preferably, the concentration of the N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane aqueous solution in step S3 is 15-25 g / L. More preferably, the concentration of the N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane aqueous solution in step S3 is 20 g / L.

[0060] In some embodiments of the present invention, the concentration of the antibacterial microcapsule finishing solution in step S3 is 20-40 g / L. Preferably, the concentration of the antibacterial microcapsule finishing solution in step S3 is 23-35 g / L. More preferably, the concentration of the antibacterial microcapsule finishing solution in step S3 is 27 g / L.

[0061] In some embodiments of the present invention, the heat treatment temperature in step S3 is 90-100°C, and the heat treatment time is 3-5 min. Preferably, the heat treatment temperature in step S3 is 100°C, and the heat treatment time is 5 min.

[0062] In some embodiments of the present invention, the drying temperature in step S3 is 70-80°C, and the heat treatment time is 20-50 min. Preferably, the drying temperature in step S3 is 80°C, and the heat treatment time is 20 min.

[0063] The present invention also provides a functional fabric based on laser-engraved microstructure synergy prepared by the method, and the application of the functional fabric based on laser-engraved microstructure synergy in the fields of medical, nursing, home and pet products.

[0064] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0065] Unless otherwise specified, the test methods or experimental methods described in the following examples are all conventional methods; unless otherwise specified, the raw materials and additives are obtained from conventional commercial sources or prepared by conventional methods.

[0066] Unless otherwise specified, all experiments were repeated three times, and the results are expressed as averages.

[0067] The laser engraving equipment used in the following embodiments or comparative examples is a carbon dioxide laser, and the laser engraving mode is dot matrix engraving.

[0068] 3-Aminopropyltriethoxysilane, CAS: 919-30-2.

[0069] N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, also known as N-aminoethyl-γ-aminopropyltrimethoxysilane, CAS number 1760-24-3.

[0070] Allyl glycidyl ether, CAS No.: 106-92-3.

[0071] 4,5-Dichloro-2-n-octyl-3-isothiazolinone, CAS:64359-81-5.

[0072] Example 1

[0073] A method for preparing a functional fabric based on laser-engraved microstructure synergy, the specific steps of which are as follows:

[0074] S1. Fabric preparation: 30% cotton fiber, 20% polyester fiber and 50% bamboo fiber are blended to obtain cotton / polyester / bamboo blended yarn, which is then woven to obtain the fabric to be processed and set aside.

[0075] S2, Laser Engraving:

[0076] S2.1 Design laser engraving patterns: Use Adobe Photoshop and Adobe Illustrator software to design laser engraving patterns;

[0077] S2.2, Set the operating parameters of the laser equipment: (1) Resolution (dpi): grating axis 100, vertical axis 300; (2) Processing speed 13000mm / s, jump speed 13000mm / s; (3) Jump delay 1000μs, light-on delay 800μs;

[0078] S2.3 Adjust the position of the pattern on the fabric and perform laser engraving to obtain the laser-engraved fabric;

[0079] S3, Post-processing:

[0080] The laser-engraved fabric was first immersed in an aqueous solution of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane with a concentration of 10 g / L and a liquor ratio of 1:8 to obtain an ammoniated fabric. Subsequently, the ammoniated fabric was immersed in an antibacterial microcapsule finishing solution with a concentration of 20 g / L and a liquor ratio of 1:10. The mixture was subjected to three dips and three nips with a 70% nip-out ratio, heat-treated at 90°C for 5 min, washed with water, and dried at 70°C for 50 min to obtain the functional fabric.

[0081] The method for preparing the antibacterial microcapsules includes the following steps:

[0082] Methyl methacrylate, ethylene glycol dimethacrylate (EGDMA), acrylic acid, allyl glycidyl ether, polyvinylpyrrolidone (PVP), and 4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT) were mixed evenly to obtain a mixture, wherein the mass ratio of methyl methacrylate, ethylene glycol dimethacrylate (EGDMA), acrylic acid, and allyl glycidyl ether was 50:1:1:3; the amount of polyvinylpyrrolidone (PVP) added accounted for 1% of the total mass of the aqueous phase; and the amount of 4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT) added accounted for 10% of the total solids content.

[0083] Next, deionized water was added to the mixture at a mass ratio of 1:20, and the system temperature was controlled at 40°C. After homogenization, potassium persulfate and sodium dodecylbenzenesulfonate were added sequentially. The amount of potassium persulfate added accounted for 0.2 wt% of the total monomers, and the amount of sodium dodecylbenzenesulfonate added was equivalent to 0.1% of the total mass of the aqueous phase. The system temperature was raised to 60°C, and the mixture was stirred for 12 hours. After centrifugation, the mixture was washed three times repeatedly with ethanol and petroleum ether. After washing, the mixture was freeze-dried to obtain antibacterial microcapsules.

[0084] Example 2

[0085] A method for preparing a functional fabric based on laser-engraved microstructure synergy, the specific steps of which are as follows:

[0086] S1. Fabric preparation: 40% cotton fiber, 20% polyester fiber and 40% bamboo fiber are blended to obtain cotton / polyester / bamboo blended yarn, which is then woven to obtain the fabric to be processed and set aside.

[0087] S2, Laser Engraving:

[0088] S2.1 Design laser engraving patterns: Use Adobe Photoshop and Adobe Illustrator software to design laser engraving patterns;

[0089] S2.2, Set the operating parameters of the laser equipment: (1) Resolution (dpi): grating axis 120, vertical axis 400; (2) Processing speed 13000mm / s, jump speed 12000mm / s; (3) Jump delay 1000μs, light-on delay 800μs;

[0090] S2.3 Adjust the position of the pattern on the fabric and perform laser engraving to obtain the laser-engraved fabric;

[0091] S3, Post-processing:

[0092] The laser-engraved fabric was first immersed in an aqueous solution of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane with a concentration of 10 g / L and a liquor ratio of 1:8 to obtain an ammoniated fabric. Subsequently, the ammoniated fabric was immersed in an antibacterial microcapsule finishing solution with a concentration of 20 g / L and a liquor ratio of 1:10. The mixture was subjected to three dips and three nips with a nip-out ratio of 75%. The fabric was then heat-treated at 100°C for 3 min, washed with water, and dried at 80°C for 20 min to obtain the functional fabric.

[0093] The method for preparing the antibacterial microcapsules includes the following steps:

[0094] Methyl methacrylate, ethylene glycol dimethacrylate (EGDMA), acrylic acid, allyl glycidyl ether, polyvinylpyrrolidone (PVP), and 4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT) were mixed evenly to obtain a mixture, wherein the mass ratio of methyl methacrylate, ethylene glycol dimethacrylate (EGDMA), acrylic acid, and allyl glycidyl ether was 55:1:3:6; the amount of polyvinylpyrrolidone (PVP) added accounted for 1% of the total mass of the aqueous phase; and the amount of 4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT) added accounted for 15% of the total solids content.

[0095] Next, deionized water was added to the mixture at a mass ratio of 1:25, and the system temperature was controlled at 40°C. After homogenization, potassium persulfate and sodium dodecylbenzenesulfonate were added sequentially. The amount of potassium persulfate added accounted for 0.2 wt% of the total monomers, and the amount of sodium dodecylbenzenesulfonate added was equivalent to 0.1% of the total mass of the aqueous phase. The system temperature was raised to 60°C, and the mixture was stirred for 36 hours. After centrifugation, the mixture was washed three times repeatedly with ethanol and petroleum ether. After washing, the mixture was freeze-dried to obtain antibacterial microcapsules.

[0096] Example 3

[0097] A method for preparing a functional fabric based on laser-engraved microstructure synergy, the specific steps of which are as follows:

[0098] S1. Fabric preparation: 50% cotton fiber, 20% polyester fiber and 30% bamboo fiber are blended to obtain cotton / polyester / bamboo blended yarn, which is then woven to obtain the fabric to be processed and set aside.

[0099] S2, Laser Engraving:

[0100] S2.1 Design laser engraving patterns: Use Adobe Photoshop and Adobe Illustrator software to design laser engraving patterns;

[0101] S2.2, Set the operating parameters of the laser equipment: (1) Resolution (dpi): grating axis 130, vertical axis 450; (2) Processing speed 12000mm / s, jump speed 13000mm / s; (3) Jump delay 1000μs, light-on delay 800μs;

[0102] S2.3 Adjust the position of the pattern on the fabric and perform laser engraving to obtain the laser-engraved fabric;

[0103] S3, Post-processing:

[0104] The laser-engraved fabric was first immersed in an aqueous solution of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane with a concentration of 20 g / L and a liquor ratio of 1:8 to obtain an amination fabric. Subsequently, the amination fabric was immersed in an antibacterial microcapsule finishing solution with a concentration of 27 g / L and a liquor ratio of 1:10. The mixture was subjected to three dips and three nips with a nip-out ratio of 80%. The mixture was then heat-treated at 100°C for 5 min, washed with water, and dried at 80°C for 20 min to obtain the functional fabric.

[0105] The method for preparing the antibacterial microcapsules includes the following steps:

[0106] Methyl methacrylate, ethylene glycol dimethacrylate (EGDMA), acrylic acid, allyl glycidyl ether, polyvinylpyrrolidone (PVP), and 4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT) were mixed evenly to obtain a mixture, wherein the mass ratio of methyl methacrylate, ethylene glycol dimethacrylate (EGDMA), acrylic acid, and allyl glycidyl ether was 60:2:4:7; the amount of polyvinylpyrrolidone (PVP) added accounted for 2% of the total mass of the aqueous phase; and the amount of 4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT) added accounted for 28% of the total solids content.

[0107] Next, deionized water was added to the mixture at a mass ratio of 1:25, and the system temperature was controlled at 45°C. After homogenization, potassium persulfate and sodium dodecylbenzenesulfonate were added sequentially. The amount of potassium persulfate added accounted for 0.5 wt% of the total monomers, and the amount of sodium dodecylbenzenesulfonate added was equivalent to 0.2% of the total mass of the aqueous phase. The system temperature was raised to 70°C, and the mixture was stirred for 16 hours. After centrifugation, the mixture was washed three times repeatedly with ethanol and petroleum ether. After washing, the mixture was freeze-dried to obtain antibacterial microcapsules.

[0108] Example 4

[0109] A method for preparing a functional fabric based on laser-engraved microstructure synergy, the specific steps of which are as follows:

[0110] S1. Fabric preparation: 70% cotton fiber, 10% polyester fiber and 20% bamboo fiber are blended to obtain cotton / polyester / bamboo blended yarn, which is then woven to obtain the fabric to be processed and set aside.

[0111] S2, Laser Engraving:

[0112] S2.1 Design laser engraving patterns: Use Adobe Photoshop and Adobe Illustrator software to design laser engraving patterns;

[0113] S2.2, Set the operating parameters of the laser equipment: (1) Resolution (dpi): grating axis 150, vertical axis 500; (2) Processing speed 14000mm / s, jump speed 15000mm / s; (3) Jump delay 1000μs, light-on delay 800μs;

[0114] S2.3 Adjust the position of the pattern on the fabric and perform laser engraving to obtain the laser-engraved fabric;

[0115] S3, Post-processing:

[0116] The laser-engraved fabric was first immersed in an aqueous solution of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane with a concentration of 30 g / L and a liquor ratio of 1:8 to obtain an ammoniated fabric. Subsequently, the ammoniated fabric was immersed in an antibacterial microcapsule finishing solution with a concentration of 40 g / L and a liquor ratio of 1:10. The mixture was subjected to three dips and three slits with a 100% slit rate. The fabric was then heat-treated at 100°C for 5 min, washed with water, and dried at 80°C for 20 min to obtain the functional fabric.

[0117] The method for preparing the antibacterial microcapsules includes the following steps:

[0118] Methyl methacrylate, ethylene glycol dimethacrylate (EGDMA), acrylic acid, allyl glycidyl ether, polyvinylpyrrolidone (PVP), and 4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT) were mixed evenly to obtain a mixture, wherein the mass ratio of methyl methacrylate, ethylene glycol dimethacrylate (EGDMA), acrylic acid, and allyl glycidyl ether was 70:3:5:8; the amount of polyvinylpyrrolidone (PVP) added accounted for 3% of the total mass of the aqueous phase; and the amount of 4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT) added accounted for 30% of the total solids content.

[0119] Next, deionized water was added to the mixture at a mass ratio of 1:30, the system temperature was controlled at 55°C, and homogenization was performed. After homogenization, potassium persulfate and sodium dodecylbenzenesulfonate were added sequentially. The amount of potassium persulfate added accounted for 0.8 wt% of the total monomers, and the amount of sodium dodecylbenzenesulfonate added was equivalent to 0.3% of the total mass of the aqueous phase. The system temperature was raised to 85°C, and the mixture was stirred for 36 hours. After centrifugation, the mixture was washed three times repeatedly with ethanol and petroleum ether. After washing, the mixture was freeze-dried to obtain antibacterial microcapsules.

[0120] Example 5

[0121] A method for preparing a functional fabric based on laser-engraved microstructure synergy, the specific steps of which are as follows:

[0122] S1. Fabric preparation: 70% cotton fiber, 20% polyester fiber and 10% bamboo fiber are blended to obtain cotton / polyester / bamboo blended yarn, which is then woven to obtain the fabric to be processed and set aside.

[0123] S2, Laser Engraving:

[0124] S2.1 Design laser engraving patterns: Use Adobe Photoshop and Adobe Illustrator software to design laser engraving patterns;

[0125] S2.2, Set the operating parameters of the laser equipment: (1) Resolution (dpi): grating axis 180, vertical axis 600; (2) Processing speed 15000mm / s, jump speed 15000mm / s; (3) Jump delay 1000μs, light-on delay 800μs;

[0126] S2.3 Adjust the position of the pattern on the fabric and perform laser engraving to obtain the laser-engraved fabric;

[0127] S3, Post-processing:

[0128] The laser-engraved fabric was first immersed in an aqueous solution of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane with a concentration of 30 g / L and a liquor ratio of 1:8 to obtain an ammoniated fabric. Subsequently, the ammoniated fabric was immersed in an antibacterial microcapsule finishing solution with a concentration of 40 g / L and a liquor ratio of 1:10. The mixture was subjected to three dips and three nips with a 100% nip-out rate, heat-treated at 100°C for 3 min, washed with water, and dried at 80°C for 20 min to obtain the functional fabric.

[0129] The method for preparing the antibacterial microcapsules includes the following steps:

[0130] Methyl methacrylate, ethylene glycol dimethacrylate (EGDMA), acrylic acid, allyl glycidyl ether, polyvinylpyrrolidone (PVP), and 4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT) were mixed evenly to obtain a mixture, wherein the mass ratio of methyl methacrylate, ethylene glycol dimethacrylate (EGDMA), acrylic acid, and allyl glycidyl ether was 80:5:5:10; the amount of polyvinylpyrrolidone (PVP) added accounted for 5% of the total mass of the aqueous phase; and the amount of 4,5-dichloro-2-n-octyl-3-isothiazolinone (DCOIT) added accounted for 40% of the total solids content.

[0131] Next, deionized water was added to the mixture at a mass ratio of 1:30, and the system temperature was controlled at 55°C. After homogenization, potassium persulfate and sodium dodecylbenzenesulfonate were added sequentially. The amount of potassium persulfate added accounted for 1.0 wt% of the total monomers, and the amount of sodium dodecylbenzenesulfonate added was equivalent to 1.0% of the total mass of the aqueous phase. The system temperature was raised to 85°C, and the mixture was stirred for 36 hours. After centrifugation, the mixture was washed three times repeatedly with ethanol and petroleum ether. After washing, the mixture was freeze-dried to obtain antibacterial microcapsules.

[0132] Comparative Example 1

[0133] The difference from Example 3 is that in step S3, the post-processing stage involves immersing the laser-engraved fabric in a mixture of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane aqueous solution and antibacterial microcapsule finishing solution, while the remaining steps are the same as in Example 3.

[0134] Comparative Example 2

[0135] The difference from Example 3 is that in step S3, the post-processing stage is as follows: the laser-engraved fabric is not immersed in an aqueous solution of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, while the remaining steps are the same as in Example 3.

[0136] Comparative Example 3

[0137] The difference from Example 3 is that in the post-processing stage of step S3, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane is replaced by an equal amount of 3-aminopropyltriethoxysilane, and the remaining steps are the same as in Example 3.

[0138] Comparative Example 4

[0139] The difference from Example 3 is that allyl glycidyl ether was not added during the preparation of the antibacterial microcapsules, while the other steps were the same as in Example 3.

[0140] Comparative Example 5

[0141] The difference from Example 3 is that the mass ratio of methyl methacrylate, ethylene glycol dimethacrylate (EGDMA), acrylic acid, and allyl glycidyl ether is 60:2:4:5, and the remaining steps are the same as in Example 3.

[0142] Comparative Example 6

[0143] The difference from Example 3 is that the mass ratio of methyl methacrylate, ethylene glycol dimethacrylate (EGDMA), acrylic acid, and allyl glycidyl ether is 60:2:4:9, and the remaining steps are the same as in Example 3.

[0144] Comparative Example 7

[0145] The difference from Example 3 is that no laser engraving was performed, but the remaining steps are the same as in Example 3.

[0146] Test Example 1

[0147] The antibacterial properties and wash fastness of the functional fabrics in the test examples and comparative examples were examined.

[0148] Test Method: Common foodborne pathogens Staphylococcus aureus and Escherichia coli were inoculated separately into nutrient agar medium, streaked, and incubated at 37°C for 24 hours. After incubation, a single colony was picked and added to 20 mL of sterilized LB liquid medium, and incubated at 37°C, 200 rpm, and shaking for 20 hours to obtain a bacterial suspension for later use. 0.5 g of the functional fabric prepared in each example or comparative example was cut into small pieces and sterilized together with 80 mL of PBS buffer. Then, 3 mL of the bacterial suspension was added, and the mixture was incubated at 37°C with shaking for 24 hours as the experimental group. The difference between the experimental group and the blank control group was that no functional fabric was added. After incubation, the mixture was diluted 10-fold to a bacterial concentration of 10. 8 CFU / mL, after shaking culture at 37℃ for 24 h, count the bacteria and calculate the inhibition rate.

[0149] ;

[0150] The washing test was conducted according to the method described in Appendix C of standard FZ / T 73023-2006 "Antibacterial Knitted Fabrics".

[0151] The test results are as follows:

[0152]

[0153] The experimental data recorded in the table above show that the functional fabrics provided in Examples 1-5 of this invention have excellent wash fastness. The antibacterial properties of the functional fabric provided in Comparative Example 1 decreased significantly after washing. This may be because the silane reacts with the microcapsules in the mixed system to form aggregates, which cannot be uniformly grafted onto the fabric or microcapsule surface, leading to a decrease in wash fastness. Comparative Example 2 did not undergo amino modification. Although the micro-pits generated by laser engraving and the micropores carried by the bamboo fiber itself provided some physical anchoring points, there was a lack of chemical bonding. At this time, the microcapsules mainly adhered to the fabric surface through van der Waals forces and mechanical interlocking, resulting in weak adhesion and easy detachment of the functional material during washing, thus decreasing wash fastness. In Comparative Example 3, after replacing N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane with other substances, the chemical structure changed, reducing the reaction sites and leading to a decrease in wash fastness. Comparative Example 4 showed the worst wash resistance in its functional fabric because it lacked allyl glycidyl ether during preparation. This resulted in a lack of groups on the microcapsule surface that could chemically bond with amino groups, causing the microcapsules to adhere to the fabric surface solely through physical action, leading to poor adhesion and consequently reduced wash resistance. In Comparative Example 5, the addition of too little allyl glycidyl ether reduced the reaction sites between the microcapsule surface and amino groups, decreasing the grafting rate and further worsening the wash resistance. In Comparative Example 6, the addition of too much allyl glycidyl ether affected the stability of the reaction, resulting in a loose microcapsule shell structure and leakage of functional substances, thus also reducing the wash resistance. Comparative Example 7, lacking laser engraving, showed decreased wash resistance in its functional fabric.

[0154] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for preparing a functional fabric based on laser-engraved microstructure synergy, characterized in that, Includes the following steps: S1. Fabric preparation: Cotton fiber, polyester fiber and bamboo fiber are blended to obtain cotton / polyester / bamboo blended yarn, which is then woven to obtain the fabric to be processed and set aside. S2, Laser Engraving: S2.1 Design laser-engraved patterns; S2.2, Set the operating parameters of the laser equipment; S2.3 Adjust the position of the pattern on the fabric and perform laser engraving; S3, Post-processing: The laser-engraved fabric is first immersed in an aqueous solution of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane to obtain an ammoniated fabric; then the ammoniated fabric is immersed in an antibacterial microcapsule finishing solution, with three dips and three slits, a slit rate of 70-100%, heat treatment, washing, and drying to obtain a functional fabric. The method for preparing the antibacterial microcapsules includes the following steps: Methyl methacrylate, ethylene glycol dimethacrylate, acrylic acid, allyl glycidyl ether, polyvinylpyrrolidone, and 4,5-dichloro-2-n-octyl-3-isothiazolinone were mixed evenly to obtain a mixture. Then, a certain proportion of deionized water was added to the mixture, and the system temperature was controlled at 40-55℃. After homogenization, potassium persulfate and sodium dodecylbenzenesulfonate were added sequentially, and the system temperature was raised to 60-85℃. The mixture was stirred for 12-36 hours, centrifuged, and repeatedly washed with ethanol and petroleum ether. After washing, the mixture was freeze-dried to obtain antibacterial microcapsules.

2. The method for preparing functional fabric based on laser-engraved microstructure synergy according to claim 1, characterized in that, The mass ratio of cotton fiber, polyester fiber and bamboo fiber in step S1 is 3-7:1-2:1-5.

5.

3. The method for preparing functional fabric based on laser-engraved microstructure synergy according to claim 1, characterized in that, The operating parameters of the laser equipment in step S2.2 are as follows: (1) Resolution (dpi): grating axis 100-180, vertical axis 300-600; (2) processing speed 13000-15000mm / s, jump speed 13000-15000mm / s; (3) jump delay 1000μs, light-on delay 800μs.

4. The method for preparing functional fabric based on laser-engraved microstructure synergy according to claim 1, characterized in that, The mass ratio of methyl methacrylate, ethylene glycol dimethacrylate, acrylic acid, and allyl glycidyl ether in step S3 is 50-80:1-5:1-5:3-10.

5. The method for preparing functional fabric based on laser-engraved microstructure synergy according to claim 1, characterized in that, The amount of polyvinylpyrrolidone added in step S3 is 1-5% of the total mass of the aqueous phase.

6. The method for preparing functional fabric based on laser-engraved microstructure synergy according to claim 1, characterized in that, The amount of 4,5-dichloro-2-n-octyl-3-isothiazolinone added in step S3 accounts for 10-40% of the total solids content.

7. The method for preparing functional fabric based on laser-engraved microstructure synergy according to claim 1, characterized in that, The amount of potassium persulfate added in step S3 accounts for 0.2-1.0 wt% of the total monomer; the amount of sodium dodecylbenzenesulfonate added in step S3 is equivalent to 0.1-1.0% of the total mass of the aqueous phase.

8. The method for preparing functional fabric based on laser-engraved microstructure synergy according to claim 1, characterized in that, The concentration of the N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane aqueous solution in step S3 is 10-30 g / L; the concentration of the antibacterial microcapsule finishing solution in step S3 is 20-40 g / L.

9. Functional fabric based on laser-engraved microstructure synergy prepared by the method according to any one of claims 1-8.

10. The functional fabric based on laser-engraved microstructure synergy prepared by the method according to any one of claims 1-8, or the application of the functional fabric based on laser-engraved microstructure synergy according to claim 9 in the fields of medical, nursing, home, and pet products.

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