Ice-sensing bio-based lyocell fabric and preparation method and application thereof

Abstract

This invention belongs to the field of textile fabric technology, specifically relating to a cooling-feel bio-based lyocell fabric, its preparation method, and its application. The cooling-feel bio-based lyocell fabric is obtained by sequentially bonding a base fabric layer, a first fabric layer, a second fabric layer, and a third fabric layer with yarns that have undergone a cooling treatment. The cooling-feel bio-based lyocell fabric of this invention uses microcapsules of *Mesona chinensis* extract as a cooling modifier to treat the base fabric layer, further enhancing the fabric's cooling effect. The fabric obtained by this invention retains the skin-friendly and comfortable properties of lyocell fiber while incorporating the performance of nylon 66, ensuring the durability and other performance characteristics of the fabric layers.

Description

Technical Field

[0001] This invention belongs to the field of textile fabric technology, specifically relating to an ice-feeling bio-based lyocell fabric, its preparation method, and its application. Background Technology

[0002] Lyocell fiber is a novel fiber produced from wood pulp using an N-methylmorpholine oxide solvent spinning method. Its production process emits no harmful substances and causes no environmental pollution. The solvent recovery rate during spinning can reach 99.5%, making it a new type of environmentally friendly fiber. Furthermore, because its raw material is derived from wood, after the fibers, yarns, fabrics, and clothing produced are used by the end consumer, they decompose into carbohydrates through sunlight and soil burial, ultimately returning to nature. This process forms a self-sustaining cycle, providing an excellent opportunity for sustainable product development. Functional, high-quality yarn products produced from lyocell fiber meet the requirements of enterprise transformation and upgrading, possess strong competitiveness, and have a broad domestic and international market.

[0003] With social development and the improvement of people's living standards, functional textiles are increasingly sought after by consumers. While meeting comfort requirements, textiles are also expected to provide protection and regulate body temperature during use. For spring and summer, the coolness of the fabric has become an important factor for some consumers when deciding whether to purchase it.

[0004] Cooling sensation primarily refers to the "instantaneous cooling sensation upon contact," that is, the cool feeling experienced by the skin when it comes into contact with fabric at a temperature lower than its own, due to the rapid transfer of heat. Cooling fibers can be produced using natural fibers with inherent cooling properties, regenerated cellulose fibers, or fibers with added mica powder and gemstone powder. Another method of achieving cooling sensation is through fiber cross-section design; irregularly shaped fiber cross-sections create a longitudinal multi-groove structure, which enhances wicking capacity. Currently available cooling fibers include cooling polyethylene fiber, gemstone fiber, nylon, modal fiber, Coolmax fiber (DuPont), SORONA fiber (DuPont), Supercool fiber (Shanghai Guida Technology Co., Ltd.), and CoolDry fiber (Quanzhou Haitian Textile Group), among others.

[0005] For example, the cooling negative ion fabric disclosed in Chinese Patent Publication No. CN119372828A improves the cooling performance of the fabric by adding cooling microcapsules to the fiber fabric. Another example is the antibacterial cooling polyester fiber containing plant extracts disclosed in Chinese Patent Publication No. CN119593094A, which modifies the fabric by adding cellulose aerogel loaded with aluminum nitride and plant extracts to achieve cooling properties. Yet another example is a plant-derived composite ultra-short fiber containing xylitol disclosed in Chinese Patent Publication No. CN119800535A, which modifies the fiber by adding plant-derived functional particles obtained through chemical modification, microencapsulation, and nano-sizing of citric acid, xylitol, and plant-derived extracts. It is evident that numerous methods for cooling fabric finishing have been developed in this field to improve the cooling effect of fabrics of different materials.

[0006] In recent years, plant-derived functional additives have been widely used in fabric improvement, mainly due to the advantages of convenient extraction and low cost of plant-derived materials. For example, adding plant extracts with antibacterial properties, such as artemisia extract, to fabrics improves their antibacterial and bacteriostatic functions; adding plant extracts with anti-UV properties, such as aloe vera extract, to fabrics improves their UV protection; adding plant extracts with antioxidant properties, such as rosemary extract, to fabrics improves their anti-aging effects; and adding plant extracts with mosquito-repellent properties, such as lavender extract, to fabrics improves their mosquito-repellent effect. Therefore, the field looks forward to developing a fabric with improved cooling sensation based on plant-derived materials, which would be of positive significance for the development of lyocell fabric products. Summary of the Invention

[0007] The first objective of this invention is to provide a method for preparing a cooling bio-based lyocell fabric, which can effectively improve the cooling sensation of lyocell fabric.

[0008] A second objective of this invention is to provide an ice-feeling bio-based lyocell fabric and further disclose its applications.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a method for preparing an ice-feeling bio-based lyocell fabric, comprising the following steps:

[0010] S1. Take Lyocell fiber and knit it in warp and weft to obtain a base fabric layer, and perform a cooling finish on the base fabric layer.

[0011] The cooling finishing step is as follows: a cooling paste containing mesona chinensis extract microcapsules is coated on the surface of the base fabric layer and dried to obtain the cooling paste; the cooling paste includes: 10-20 g / L mesona chinensis extract microcapsules, 8-12 g / L hydrophobic finishing agent, 0.1-0.5 g / L crosslinking agent, and the balance being water;

[0012] The mesona chinensis extract microcapsules are nano-sized microcapsules formed by spray drying mesona chinensis extract and gelatin wall material.

[0013] S2. Take a first composite yarn containing 10-20wt% nylon 66 and 80-90wt% lyocell fiber and knit it in warp and weft to obtain the first fabric layer;

[0014] S3. Take the second composite yarn containing 25-35wt% nylon 66 and 65-75wt% lyocell fiber and knit it in warp and weft to obtain the second fabric layer;

[0015] S4. Take the third composite yarn containing 40-50wt% nylon 66 and 50-60wt% lyocell fiber and knit it in warp and weft to obtain the third fabric layer;

[0016] S5. Connect and composite each fabric layer with yarn in the order of base fabric layer - first fabric layer - second fabric layer - third fabric layer to obtain ice-feel bio-based lyocell fabric.

[0017] Preferably, the lyocell fiber is a 40-60 count lyocell fiber.

[0018] Preferably, the nylon 66 is nylon 66 fiber with a denier of 50-150.

[0019] Preferably, the hydrophobic finishing agent is polydimethylsiloxane.

[0020] Preferably, the crosslinking agent is citric acid.

[0021] Preferably, the extraction method of the herb extract includes the following steps:

[0022] S11. After drying the herb, crush it, add water, mix well, and decoct to extract the liquid. Collect the water extract and water extract residue separately.

[0023] S12. Take the water extraction residue, add ethanol for extraction, collect the ethanol extract, remove the ethanol, and obtain the residue extract.

[0024] S13. Combine the aqueous extract and the residue extract, and concentrate them to obtain an extract;

[0025] S14. The extract is spray-dried to obtain Mesona chinensis extract.

[0026] Preferably, in step S11, the mass ratio of the herb to water is 1:(5-8), and the decoction time is 0.5-1 hour.

[0027] Preferably, in step S12, the ethanol is an aqueous solution of ethanol with a volume concentration of 75-85 wt%, the mass ratio of the water extraction residue to the ethanol is 1:(5-8), and the extraction time is 1-2 hours.

[0028] Preferably, in step S13, the concentration is vacuum concentration.

[0029] Preferably, in step S14, the spray drying temperature is 45-55°C.

[0030] Preferably, the coating amount of the cooling slurry is 100-120 g / m². 3 .

[0031] The present invention also discloses an ice-feeling bio-based lyocell fabric, which is prepared by the method of preparing the ice-feeling bio-based lyocell fabric.

[0032] The present invention also discloses an application of an ice-feeling bio-based lyocell fabric, which is used to make functional textiles.

[0033] Compared with the prior art, the beneficial effects of the present invention are:

[0034] The cooling-feel bio-based lyocell fabric of this invention further enhances the cooling effect of the fabric by performing a cooling finishing process on the base fabric layer. Specifically, herbal extract can be used as a cooling modifier. Testing showed that its Q-max value indicates that its cooling-feel improvement performance is similar to that of xylitol, a conventional cooling modifier in the field, and slightly lower than that of aluminum nitride, still demonstrating a certain degree of cooling enhancement performance, while also offering the advantage of low cost. The natural active ingredients of herbal extract can also significantly improve the antibacterial properties of lyocell fiber fabric, enhancing its application performance. Compared to traditional cooling-feel improvement materials, the improvement performance of herbal extract is more comprehensive.

[0035] The ice-feeling bio-based lyocell fabric of this invention is formed by weft knitting composite yarns made of lyocell and nylon 66 in different proportions to form fabric layers. The yarns are then connected in a certain composite order to form a composite fabric. At the same time, pure lyocell fiber fabric is used as the skin-friendly base fabric layer and is treated with a cooling finish. This retains the skin-friendly and comfortable characteristics of lyocell fiber, while combining the strength, toughness and other performance advantages of nylon 66 woven with lyocell fiber to ensure the durability and other performance characteristics of the entire fabric layer. The fabrics formed with different nylon 66 blending ratios also have different breathability, flexibility and durability properties. The composite of each fabric layer effectively ensures the application performance of the entire fabric. Detailed Implementation

[0036] 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.

[0037] The present invention provides a method for preparing an ice-feeling bio-based lyocell fabric in the following embodiments, comprising the following steps:

[0038] S1. Take Lyocell fiber and knit it in warp and weft to obtain a base fabric layer, and perform a cooling finish on the base fabric layer.

[0039] The cooling finishing step is as follows: a cooling paste containing mesona chinensis extract microcapsules is coated on the surface of the base fabric layer and dried to obtain the cooling paste; the cooling paste includes: 10-20 g / L mesona chinensis extract microcapsules, 8-12 g / L hydrophobic finishing agent, 0.1-0.5 g / L crosslinking agent, and the balance being water;

[0040] The mesona chinensis extract microcapsules are nano-sized microcapsules formed by spray drying mesona chinensis extract and gelatin wall material.

[0041] S2. Take a first composite yarn containing 10-20wt% nylon 66 and 80-90wt% lyocell fiber and knit it in warp and weft to obtain the first fabric layer;

[0042] S3. Take the second composite yarn containing 25-35wt% nylon 66 and 65-75wt% lyocell fiber and knit it in warp and weft to obtain the second fabric layer;

[0043] S4. Take the third composite yarn containing 40-50wt% nylon 66 and 50-60wt% lyocell fiber and knit it in warp and weft to obtain the third fabric layer;

[0044] S5. Connect and composite each fabric layer with yarn in the order of base fabric layer - first fabric layer - second fabric layer - third fabric layer to obtain ice-feel bio-based lyocell fabric.

[0045] In a preferred embodiment, the lyocell fiber is a 40-60 count lyocell fiber.

[0046] In a preferred embodiment, the nylon 66 is nylon 66 fiber with a denier of 50-150.

[0047] The ice-feeling bio-based lyocell fabric produced by this invention uses lyocell fiber fabric as the base fabric layer and performs a cooling finish. The fabric layers with different blending ratios are sequentially arranged in the order of first fabric layer - second fabric layer - third fabric layer. The base fabric layer, as the skin-friendly part, effectively ensures the skin-friendly properties of the fabric, such as its cooling effect. The nylon blending ratio of the other fabric layers increases sequentially, which not only creates a breathability difference between the fabric layers but also effectively ensures the toughness and durability of the fabric.

[0048] As a preferred embodiment, the cooling finishing method involves coating the surface of the base fabric layer with a cooling paste containing microcapsules of mesona chinensis extract, followed by drying. This embodiment of the invention does not involve any technological innovation in the coating method; it refers to the existing method of spraying cooling paste for finishing. This embodiment of the invention performs a cooling treatment on the base fabric layer to ensure the cooling performance of the contact areas.

[0049] In the cooling bio-based lyocell fabric described in this invention, herbal extract is selected as the active ingredient, which can enhance the cooling effect of the lyocell fabric. It is used as a cooling finishing agent by constructing a microcapsule system. At the same time, thanks to the antibacterial effect of herbal extract, the fabric treated with herbal extract microcapsules has both antibacterial and cooling enhancement effects.

[0050] In the cooling-feel bio-based lyocell fabric described in this invention, the cooling finish of the base fabric layer employs a conventional plant extract microcapsule finishing process. Microcapsule finishing, as a fabric finishing technology, involves encapsulating plant extracts (core material) into microcapsules using a polymer material (wall material), which are then sprayed onto the fabric surface. During use, friction or washing causes the microcapsules to rupture, releasing the active ingredients and improving the fabric's target performance. The core value of microcapsule finishing lies in addressing the drawbacks of plant extracts' volatility and poor washability through the "encapsulation" of the wall material, thus making it suitable for high-end functional fabrics.

[0051] The ice-feel bio-based lyocell fabric of this invention adopts the core design concept of microcapsules used in conventional plant extract microcapsule finishing processes, namely, a core-shell structure microcapsule: the core material is a plant extract (in this invention, it is mesona extract); the wall material is a natural / synthetic polymer (in this invention, it is gelatin), forming micron to millimeter-sized capsules, effectively isolating the influence of the external environment (light, heat, oxygen, water), reducing the decomposition and volatilization of active ingredients, and ensuring effective fabric finishing.

[0052] As a preferred embodiment, the drying temperature is 80-100°C.

[0053] In a preferred embodiment, the *Mesona chinensis* extract microcapsules are nanoscale microcapsules formed by spray drying of *Mesona chinensis* extract and gelatin wall material, with a particle size of 200-300 nm. This invention does not involve any innovative microencapsulation technology for the extract; conventional methods in the prior art can be used to microencapsulate the *Mesona chinensis* extract.

[0054] In a preferred embodiment, the extract of *Mesona chinensis*, as a cooling and stimulating active substance, is extracted using the following steps:

[0055] S11. After drying the herb, crush it, add water, mix well, and decoct to extract the liquid. Collect the water extract and water extract residue separately.

[0056] S12. Take the water extraction residue, add ethanol for extraction, collect the ethanol extract, remove the ethanol, and obtain the residue extract.

[0057] S13. Combine the aqueous extract and the residue extract, and concentrate them to obtain an extract;

[0058] S14. The extract is spray-dried to obtain Mesona chinensis extract.

[0059] In a preferred embodiment, in step S11, the mass ratio of the herb to water is 1:(5-8), and the decoction time is 0.5-1 hour.

[0060] In a preferred embodiment, in step S12, the ethanol is an aqueous solution with a volume concentration of 75-85%, the mass ratio of the water extraction residue to the ethanol is 1:(5-8), and the extraction time is 1-2 hours.

[0061] In a preferred embodiment, in step S13, the concentration step is vacuum concentration; and / or,

[0062] In a preferred embodiment, the temperature of the spray drying step in step S14 is 45-55°C.

[0063] As a preferred embodiment, the hydrophobic finishing agent is polydimethylsiloxane.

[0064] As a preferred embodiment, the crosslinking agent is citric acid.

[0065] An embodiment of the present invention also discloses an ice-feeling bio-based lyocell fabric, which is prepared by the method for preparing the ice-feeling bio-based lyocell fabric.

[0066] Embodiments of the present invention also disclose an application of an ice-feeling bio-based lyocell fabric, which is used to make functional textiles. Example 1

[0067] The preparation method of the ice-feeling bio-based lyocell fabric described in this embodiment includes the following steps:

[0068] S1. A base fabric layer is obtained by warp and weft knitting of 60-count Lyocell fiber; a cooling paste containing microcapsules of Gynostemma pentaphyllum extract is coated on the surface of the base fabric layer, with the coating amount controlled at 110g / m². 3 Then dry thoroughly at 90℃ for later use;

[0069] S2. Take a first composite yarn containing 15wt% nylon 66 (100 denier) and 85wt% lyocell fiber (60 count) and knit it in warp and weft to obtain the first fabric layer;

[0070] S3. Take a second composite yarn containing 30wt% nylon 66 (100 denier) and 70wt% lyocell fiber (60 count) and knit it in warp and weft to obtain the second fabric layer;

[0071] S4. Take the third composite yarn containing 45wt% nylon 66 (100 denier) and 55wt% lyocell fiber (60 count) and knit it in warp and weft to obtain the third fabric layer;

[0072] S5. Connect and composite each fabric layer with yarn in the order of base fabric layer - first fabric layer - second fabric layer - third fabric layer to obtain ice-feel bio-based lyocell fabric.

[0073] In this embodiment, in the cooling finishing step of the base fabric layer, the cooling paste includes: 15g / L of Mesona chinensis extract microcapsules, 10g / L of hydrophobic finishing agent, 0.3g / L of crosslinking agent, and the remainder is water.

[0074] In this embodiment, the *Mesona chinensis* extract microcapsules are nanoscale microcapsules formed by spray drying of *Mesona chinensis* extract and gelatin wall material. Specifically, the *Mesona chinensis* extract and gelatin wall material are fully dissolved in water to obtain a microcapsule solution, which is then sprayed into tiny droplets using a spray dryer and rapidly dried to form nanoscale microcapsules. In this embodiment, the *Mesona chinensis* extract microcapsules have a particle size of 250 nm.

[0075] In this embodiment, the extraction method of the herb extract includes the following steps:

[0076] S11. After drying the herb, crush it, add water and mix well for decoction extraction. The mass ratio of herb to water is 1:6, and the decoction time is 0.75 hours. After filtration, collect the water extract and water extract residue separately.

[0077] S12. Take the water-extracted residue and add it to an 80% volume concentration ethanol aqueous solution for reflux extraction. The mass ratio of water-extracted residue to ethanol aqueous solution is 1:7. The extraction time is 1.5 hours. After filtration, collect the ethanol extract. After removing the ethanol by vacuum distillation, obtain the residue extract.

[0078] S13. Combine the aqueous extract and the residue extract, remove impurities with activated carbon, and concentrate by vacuum distillation to obtain the extract.

[0079] S14. Take the extract, spray dry it at 50°C, and then pulverize it to nanoscale particle size to obtain the herb extract.

[0080] In this embodiment, the hydrophobic finishing agent is polydimethylsiloxane.

[0081] In this embodiment, the crosslinking agent is citric acid.

[0082] This embodiment also provides an ice-feeling bio-based lyocell fabric, which is prepared by the method for preparing the ice-feeling bio-based lyocell fabric.

[0083] This embodiment also discloses an application of an ice-feeling bio-based lyocell fabric, which is used to make functional textiles. Example 2

[0084] The preparation method of the ice-feeling bio-based lyocell fabric described in this embodiment includes the following steps:

[0085] S1. A base fabric layer is obtained by warp and weft knitting of 40-count Lyocell fiber; a cooling paste containing microcapsules of Gynostemma pentaphyllum extract is coated on the surface of the base fabric layer, with the coating amount controlled at 100g / m². 3 Then dry thoroughly at 80℃ for later use;

[0086] S2. Take a first composite yarn containing 10wt% nylon 66 (150 denier) and 90wt% lyocell fiber (40 count) and knit it in warp and weft to obtain the first fabric layer;

[0087] S3. Take a second composite yarn containing 25wt% nylon 66 (150 denier) and 75wt% lyocell fiber (40 count) and knit it in warp and weft to obtain the second fabric layer;

[0088] S4. Take the third composite yarn containing 40wt% nylon 66 (150 denier) and 60wt% lyocell fiber (40 count) and knit it in warp and weft to obtain the third fabric layer;

[0089] S5. Connect and composite each fabric layer with yarn in the order of base fabric layer - first fabric layer - second fabric layer - third fabric layer to obtain ice-feel bio-based lyocell fabric.

[0090] In this embodiment, in the cooling finishing step of the base fabric layer, the cooling paste includes: 10g / L of Mesona chinensis extract microcapsules, 8g / L of hydrophobic finishing agent, 0.1g / L of crosslinking agent, and the remainder is water.

[0091] In this embodiment, the *Mesona chinensis* extract microcapsules are nanoscale microcapsules formed by spray drying of *Mesona chinensis* extract and gelatin wall material. Specifically, the *Mesona chinensis* extract and gelatin wall material are fully dissolved in water to obtain a microcapsule solution, which is then sprayed into tiny droplets using a spray dryer and rapidly dried to form nanoscale microcapsules. In this embodiment, the *Mesona chinensis* extract microcapsules have a particle size of 200 nm.

[0092] In this embodiment, the extraction method of the herb extract includes the following steps:

[0093] S11. After drying the herb, crush it, add water and mix well for decoction extraction. The mass ratio of herb to water is 1:5, and the decoction time is 0.5 hours. After filtration, collect the water extract and water extract residue separately.

[0094] S12. Take the water-extracted residue and add it to an ethanol aqueous solution with a volume concentration of 75% for reflux extraction. The mass ratio of water-extracted residue to ethanol aqueous solution is 1:5. The extraction time is 1 hour. After filtration, collect the ethanol extract. After removing the ethanol by vacuum distillation, obtain the residue extract.

[0095] S13. Combine the aqueous extract and the residue extract, remove impurities with activated carbon, and concentrate by vacuum distillation to obtain the extract.

[0096] S14. Take the extract, spray dry it at 45°C, and then pulverize it to nanoscale particle size to obtain the herb extract.

[0097] In this embodiment, the hydrophobic finishing agent is polydimethylsiloxane.

[0098] In this embodiment, the crosslinking agent is citric acid.

[0099] This embodiment also provides an ice-feeling bio-based lyocell fabric, which is prepared by the method for preparing the ice-feeling bio-based lyocell fabric.

[0100] This embodiment also discloses an application of an ice-feeling bio-based lyocell fabric, which is used to make functional textiles. Example 3

[0101] The preparation method of the ice-feeling bio-based lyocell fabric described in this embodiment includes the following steps:

[0102] S1. A base fabric layer is obtained by warp and weft knitting of 50-count Lyocell fiber; a cooling paste containing microcapsules of Gynostemma pentaphyllum extract is coated on the surface of the base fabric layer, with the coating amount controlled at 120g / m². 3 Then dry thoroughly at 100℃ for later use;

[0103] S2. Take a first composite yarn containing 20wt% nylon 66 (50 denier) and 80wt% lyocell fiber (50 count) and knit it in warp and weft to obtain the first fabric layer;

[0104] S3. Take a second composite yarn containing 35wt% nylon 66 (50 denier) and 65wt% lyocell fiber (50 count) and knit it in warp and weft to obtain the second fabric layer;

[0105] S4. Take the third composite yarn containing 50wt% nylon 66 (50 denier) and 50wt% lyocell fiber (50 count) and knit it in warp and weft to obtain the third fabric layer;

[0106] S5. Connect and composite each fabric layer with yarn in the order of base fabric layer - first fabric layer - second fabric layer - third fabric layer to obtain ice-feel bio-based lyocell fabric.

[0107] In this embodiment, in the cooling finishing step of the base fabric layer, the cooling paste includes: 20g / L of Mesona chinensis extract microcapsules, 12g / L of hydrophobic finishing agent, 0.5g / L of crosslinking agent, and the remainder is water.

[0108] In this embodiment, the *Mesona chinensis* extract microcapsules are nanoscale microcapsules formed by spray drying of *Mesona chinensis* extract and gelatin wall material. Specifically, the *Mesona chinensis* extract and gelatin wall material are fully dissolved in water to obtain a microcapsule solution, which is then sprayed into tiny droplets using a spray dryer and rapidly dried to form nanoscale microcapsules. In this embodiment, the *Mesona chinensis* extract microcapsules have a particle size of 300 nm.

[0109] In this embodiment, the extraction method of the herb extract includes the following steps:

[0110] S11. After drying the herb, crush it, add water and mix well for decoction extraction. The mass ratio of herb to water is 1:8, and the decoction time is 1 hour. After filtration, collect the water extract and water extract residue separately.

[0111] S12. Take the water-extracted residue and add it to an 80% volume concentration ethanol aqueous solution for reflux extraction. The mass ratio of water-extracted residue to ethanol aqueous solution is 1:8. The extraction time is 2 hours. After filtration, collect the ethanol extract. After removing the ethanol by vacuum distillation, obtain the residue extract.

[0112] S13. Combine the aqueous extract and the residue extract, remove impurities with activated carbon, and concentrate by vacuum distillation to obtain the extract.

[0113] S14. Take the extract, spray dry it at 55°C, and then pulverize it to nanoscale particle size to obtain the herb extract.

[0114] In this embodiment, the hydrophobic finishing agent is polydimethylsiloxane.

[0115] In this embodiment, the crosslinking agent is citric acid.

[0116] This embodiment also provides an ice-feeling bio-based lyocell fabric, which is prepared by the method for preparing the ice-feeling bio-based lyocell fabric.

[0117] This embodiment also discloses an application of an ice-feeling bio-based lyocell fabric, which is used to make functional textiles. Experimental Example

[0118] In the following experimental scheme of the present invention, the cool-feeling lyocell base fabric layer obtained by the cooling treatment in step S1 of Example 1 is used as the experimental group fabric, and the following control group fabric is set up at the same time:

[0119] Control group 1: In the cooling slurry, xylitol particles were used instead of mesona chinensis extract to prepare microcapsules;

[0120] Control group 2: In the cooling slurry, aluminum nitride particles were used instead of mesona chinensis extract to prepare microcapsules;

[0121] Control group 3: No cooling treatment was applied to the base fabric layer of the ice-feeling bio-based lyocell fabric.

[0122] 1. Cooling sensation test

[0123] Coolness tests were conducted on the fabrics from the experimental group and the control group, respectively.

[0124] In this experimental example, the instantaneous cooling performance was tested according to GB / T 35263-2017 "Test and evaluation of instantaneous cooling performance of textiles".

[0125] The intensity of the instantaneous cooling sensation produced by a fabric when it comes into contact with the skin is measured by the Q-max (unit: W / cm²). Generally, the higher the Q-max value, the more obvious the cooling sensation when the fabric comes into contact with the skin.

[0126] The specific test results are shown in Table 1 below.

[0127] Table 1 Q-max test results

[0128]

[0129] As can be seen, the present invention uses mesona extract as a cooling modifier, and its cooling effect is similar to that of xylitol, slightly lower than that of aluminum nitride, but still shows a certain cooling effect, and the cost is lower.

[0130] Currently, this invention employs a combination of water extraction and alcohol extraction for the extraction of Mesona chinensis. Although the specific components that regulate the cooling sensation of Lyocell fabric are not entirely clear, the low cost and wide cultivation of Mesona chinensis still provide a new avenue for its widespread application and offer new ideas for the development of new bio-based environmentally friendly fabrics in the textile industry.

[0131] 2. Antibacterial test

[0132] Antibacterial properties were tested on fabrics from the experimental group and the control group, respectively.

[0133] In this experimental example, the antibacterial properties were tested according to GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Vibration method", and the results are shown in Table 2 below.

[0134] Table 2 Antibacterial test results

[0135]

[0136] As can be seen, the present invention uses herbal extract as a cooling modifier. The natural active ingredients of the extract can also significantly improve the antibacterial properties of lyocell fiber fabric and enhance its application performance.

[0137] In summary, the present invention uses herbal extract to regulate the performance of lyocell fabric, which not only has significant antibacterial properties but also improves the cooling sensation of lyocell fabric, providing a new approach for the development of novel lyocell fabrics.

[0138] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0139] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for preparing an ice-feeling bio-based lyocell fabric, characterized in that, Includes the following steps: S1. Take Lyocell fiber and knit it in warp and weft to obtain a base fabric layer, and perform a cooling finish on the base fabric layer. The cooling finishing step is as follows: a cooling paste containing microcapsules of mesona chinensis extract is coated on the surface of the base fabric layer and dried to obtain the cooling paste; the cooling paste includes: 10-20 g / L of mesona chinensis extract microcapsules, 8-12 g / L of hydrophobic finishing agent, 0.1-0.5 g / L of crosslinking agent, and the balance being water; The mesona chinensis extract microcapsules are nano-sized microcapsules formed by spray drying mesona chinensis extract and gelatin wall material. S2. Take a first composite yarn containing 10-20wt% nylon 66 and 80-90wt% lyocell fiber and knit it in warp and weft to obtain the first fabric layer; S3. Take the second composite yarn containing 25-35wt% nylon 66 and 65-75wt% lyocell fiber and knit it in warp and weft to obtain the second fabric layer; S4. Take the third composite yarn containing 40-50wt% nylon 66 and 50-60wt% lyocell fiber and knit it in warp and weft to obtain the third fabric layer; S5. Connect and composite each fabric layer with yarn in the order of base fabric layer - first fabric layer - second fabric layer - third fabric layer to obtain ice-feel bio-based lyocell fabric.

2. The method for preparing the ice-feeling bio-based lyocell fabric according to claim 1, characterized in that: The lyocell fiber is a 40-60 count lyocell fiber; And / or, the nylon 66 is nylon 66 fiber of 50-150 denier.

3. The method for preparing the ice-feeling bio-based lyocell fabric according to claim 1, characterized in that, The hydrophobic finishing agent is polydimethylsiloxane.

4. The method for preparing the ice-feeling bio-based lyocell fabric according to claim 1, characterized in that, The crosslinking agent is citric acid.

5. The method for preparing the ice-feeling bio-based lyocell fabric according to claim 1, characterized in that, The extraction method of the herb extract includes the following steps: S11. After drying the herb, crush it, add water, mix well, and decoct to extract the liquid. Collect the water extract and water extract residue separately. S12. Take the water extraction residue, add ethanol for extraction, collect the ethanol extract, remove the ethanol, and obtain the residue extract. S13. Combine the aqueous extract and the residue extract, and concentrate them to obtain an extract; S14. The extract is spray-dried to obtain Mesona chinensis extract.

6. The method for preparing the ice-feeling bio-based lyocell fabric according to claim 5, characterized in that, In step S11, the mass ratio of the herb to water is 1:(5-8), and the decoction time is 0.5-1 hour. And / or, in step S12, the ethanol is an aqueous solution of ethanol with a volume concentration of 75-85%, the mass ratio of the water extraction residue to the ethanol is 1:(5-8), and the extraction time is 1-2 hours; And / or, in step S13, the concentration is reduced pressure concentration; And / or, in step S14, the spray drying temperature is 45-55°C.

7. A cooling bio-based lyocell fabric, prepared by the method of any one of claims 1-6.

8. An application of an ice-feeling bio-based lyocell fabric, characterized in that, The ice-feeling bio-based lyocell fabric of claim 7 is used to make functional textiles.

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