A small jacquard home textile fabric made of Tianxue cotton and its preparation method

Abstract

The present invention discloses a small jacquard home textile fabric made of Tianxue cotton and a preparation method thereof. The preparation method includes the following steps: preparation of chitin microcapsules, pretreatment of long-staple cotton fibers, electrostatic adsorption of chitin, and weaving of the home textile fabric. The small jacquard home textile fabric made of Tianxue cotton and the preparation method provided by this application can improve the antibacterial effect of the home textile fabric, and at the same time reduce the influence on the physical properties and warmth retention effect of the home textile fabric after adding antibacterial fibers.

Description

Technical Field

[0001] The present invention relates to the technical field of home textile fabric preparation, and specifically relates to a small jacquard home textile fabric made of Tianxue cotton and a preparation method thereof. Background Art

[0002] The small jacquard home textile fabric made of Tianxue cotton is a high-end home textile fabric mainly made of Tianxue cotton and woven by the small jacquard process, and is commonly used for beddings, curtains, sofa covers, etc. The small jacquard weave is mostly used for thin fabrics, and has the characteristics of being tight, delicate in appearance, and the patterns are not very prominent. The small jacquard weave is a weave that uses a dobby loom to form various small patterns on the fabric surface through the change of two or more fabric weaves. Small patterns are woven on the fabric by the loom, and the patterns are delicate but not complicated, enhancing the beauty and texture of the fabric. The small geometric or floral patterns formed by the small jacquard process have strong layering and an elegant visual effect.

[0003] Tianxue cotton is a high-quality cotton fiber, known for its softness, fineness, breathability and hygroscopicity, and is commonly used in high-end textiles. Among them, Tianxue cotton mainly uses long-staple cotton (such as Egyptian cotton, Pima cotton, Xinjiang long-staple cotton), and the fiber length and strength of these cottons are superior to those of ordinary cotton. The fiber length of long-staple cotton is usually above 33 mm, making the Tianxue cotton fabric softer and smoother. And the fiber fineness is high, the fabric feels delicate, and it is suitable for close-fitting use.

[0004] Tianxue cotton itself has poor antibacterial properties as a cotton fiber and is prone to breeding bacteria and molds. Therefore, there are now many processes to improve the antibacterial performance of the fabric by blending it with chitin fiber. Chitin fiber is a natural polysaccharide substance. There are a large number of fine grooves on the longitudinal surface of the cross-section of chitin fiber, and there are many small voids in the core layer, which can promote the capillary effect, quickly dissipate the absorbed sweat, effectively prevent the generation of bacteria, and thus enhance the antibacterial effect. However, since the strength of chitin fiber is usually lower than that of long-staple cotton fiber, the overall strength and durability of the material may be reduced after mixing. In addition, the addition of chitin fiber will affect the proportion of long-staple cotton fiber in the fabric, and thus reduce its thermal insulation effect. Summary of the Invention

[0005] The present application provides a small jacquard home textile fabric made of Tianxue cotton and a preparation method thereof, which are used to improve the antibacterial effect of the home textile fabric, and at the same time reduce the influence on the physical properties and thermal insulation effect of the home textile fabric after the addition of antibacterial fibers.

[0006] A preparation method of a small jacquard home textile fabric made of Tianxue cotton includes the following steps: S1. Preparation of chitin solution: Dissolve chitin powder in acetic acid solution and filter the solution to remove impurities to form chitin solution; S2. Preparation of PCM emulsion: Heat and melt PCM material, then add emulsifier and stir evenly; Slowly add the chitin solution to the melted PCM material and stir at high speed or perform ultrasonic treatment to form an oil-in-water emulsion; S3. Coacervation of chitin: Add sodium hydroxide solution and adjust the pH value of the solution to deprotonate the amino group of chitin; Dissolve gelatin in deionized water to form a transparent solution, and slowly add the gelatin solution to the PCM emulsion to cause coacervation between chitin and gelatin to obtain a mixed solution of chitin microcapsules; S4. Post-treatment of chitin microcapsules: Add a crosslinking agent to the mixed solution of chitin microcapsules and stir at room temperature to solidify the chitin shell; Wash the microcapsules with deionized water multiple times to remove residual crosslinking agent and emulsifier; Dry the washed microcapsules at room temperature to obtain chitin microcapsules.

[0007] By adopting the above technical solution, after the long-staple cotton fibers are loaded with PCM microcapsules, they can absorb, store and release heat, thereby regulating the temperature of the environment around the fibers. Absorb heat at high temperature to reduce the perceived temperature; Release heat at low temperature to provide a warming effect. When the ambient temperature rises, PCM changes from solid state to liquid state and absorbs heat; When the ambient temperature drops, PCM changes from liquid state to solid state and releases heat. The microcapsules of chitin and gelatin encapsulate PCM inside to prevent its leakage, while allowing heat to be transferred through the shell. In addition, chitin itself has natural antibacterial properties and can inhibit the growth of bacteria and fungi. The long-staple cotton fibers loaded with chitin microcapsules have a persistent antibacterial effect.

[0008] Moreover, the long-staple cotton fibers themselves have the characteristics of being soft, breathable and having good hygroscopicity. And chitin has good moisture retention and biocompatibility, which can improve the skin care performance of long-staple cotton fibers. Thus, it is suitable for use in next-to-skin clothing to reduce skin dryness and irritation. When loaded with PCM microcapsules, its comfort can be further improved. In an environment with large temperature changes, it can keep the temperature of the human skin relatively stable and reduce heat stress.

[0009] In addition, different from the co-spinning of chitin fibers and long-staple cotton fibers in this application, the chitin shell is solidified by a crosslinking agent and has high mechanical strength and chemical stability. The microcapsules and the fibers are combined by electrostatic adsorption to ensure their firm attachment on the fiber surface.

[0010] Preferably, the pretreatment of the long-staple cotton fiber includes the following operating steps: soaking the long-staple cotton fiber in deionized water to remove surface impurities and grease; washing the fiber with a detergent (neutral soap solution), and then rinsing it thoroughly with deionized water; adding an anionic modifier to treat the fiber and reacting at 50-70 °C for 1-2 hours; after the reaction, rinsing the long-staple cotton fiber with deionized water to remove the unreacted modifier and adjusting the pH > 8.

[0011] Preferably, the electrostatic adsorption of the chitin includes the following operating steps: dispersing the chitin microcapsules in a buffer solution, and using ultrasonic treatment to uniformly disperse the microcapsules, and adjusting the pH value of the suspension with a dilute hydrochloric acid solution to make the microcapsules carry a positive charge, and adding a surfactant and a dispersant, and continuing to stir or perform ultrasonic treatment to ensure that the suspension is uniform and stable, obtaining a chitin microcapsule suspension; immersing the pretreated long-staple cotton fiber in the chitin microcapsule suspension, performing ultrasonic treatment to promote the contact between the microcapsules and the fiber, controlling the time for 1-5 h, taking out the long-staple cotton fiber from the suspension, gently washing it with deionized water to remove the unadsorbed microcapsules; drying the long-staple cotton fiber at 40-70 °C; obtaining the modified long-staple cotton fiber.

[0012] By adopting the above technical solution, in this application, the chitin microcapsules are dispersed in a deionized buffer solution, and ultrasonic treatment is used to uniformly disperse the microcapsules and avoid agglomeration. Under acidic conditions (pH < 6), the amino group of chitin will be protonated (-NH3⁺), making the surface of the microcapsules carry a positive charge, and then adding a small amount of surfactant or dispersant to prevent the microcapsules from agglomerating. During the pretreatment process of the long-staple cotton fiber, an anionic modifier is used to treat the fiber and the pH is adjusted > 8. Since the surface of the fiber and the microcapsules carry opposite charges, the microcapsules will be adsorbed on the fiber surface through electrostatic interaction. Control the adsorption time (usually 30 minutes to 2 hours) to ensure uniform distribution of the microcapsules. The microcapsules obtained by the above method are uniformly distributed and firmly combined. And the process is environmentally friendly without using a large amount of chemical reagents. It not only effectively loads the chitin microcapsules on the long-staple cotton fiber, endowing it with antibacterial and heat preservation functions, but also maintains the original properties of the fiber.

[0013] Preferably, the textile of the home textile fabric includes the following operating steps: the modified long-staple cotton fiber is made into a yarn of the modified long-staple cotton fiber through the processes of roving, spinning, winding, twisting, and warping; the yarn of the modified long-staple cotton fiber is woven through warping, sizing, drawing-in, and looms to finally complete the weaving. The weaving uses a dobby loom with a dobby control of 16 or 20 harnesses to realize the weaving of the home textile fabric.

[0014] Preferably, in the preparation process of the PCM emulsion, the PCM material includes one or more of n-octadecane, n-eicosane, n-docosane, lauric acid, palmitic acid, stearic acid, polyurethane, and polyvinyl alcohol.

[0015] By adopting the above technical solution, the phase change materials adopted in this application mainly include paraffin-based PCM materials, fatty acid-based PCM materials, and solid-solid PCM materials. Among them, n-octadecane, n-eicosane, and n-docosane are paraffin-based PCM materials, with a phase change temperature range of 18 - 40 °C, which is suitable for the human comfort temperature range, and has high latent heat and good thermal stability. Lauric acid, palmitic acid, and stearic acid belong to fatty acid-based PCM materials with a phase change temperature range of 20 - 70 °C. Polyurethane and polyvinyl alcohol are solid-solid PCM materials. Since there is no liquid phase during the phase change process, the leakage problem is avoided. Although the thermal stability is good, the latent heat is relatively low.

[0016] Preferably, in the preparation process of the PCM emulsion, the emulsifier includes one or more of Tween 20, Tween 80, Span 20, Span 80, sodium dodecyl sulfate, polyethylene glycol, lecithin, and polyvinyl alcohol.

[0017] Preferably, in the post-treatment of the chitin microcapsules, the cross-linking agent includes one or more of glutaraldehyde, epichlorohydrin, sodium tripolyphosphate, carbodiimide, and dialdehyde starch.

[0018] By adopting the above technical solution, this application uses glutaraldehyde as a cross-linking agent, which can react with the amino groups in chitin to form a stable cross-linked structure. Epichlorohydrin can be used for the chemical cross-linking of chitin to improve the stability of the material. Sodium tripolyphosphate enhances the structural stability of chitin through ionic cross-linking. Carbodiimide, as a cross-linking agent for biological materials, can activate the reaction between carboxyl groups and amino groups, thereby improving the stability with chitin. Dialdehyde starch, a cross-linking agent of natural origin, is environmentally friendly and has good biocompatibility, and can improve the stability with chitin.

[0019] Preferably, the detergent includes one or more of sodium dodecylbenzenesulfonate and fatty alcohol polyoxyethylene ether.

[0020] By adopting the above technical solution, this application uses a neutral surfactant for washing, avoiding the use of detergents containing strong acids, strong alkalis, or bleaching components to avoid damaging the softness and strength of long-staple cotton fibers.

[0021] Preferably, the anionic modifier includes one or more of citric acid, maleic acid, and acrylic acid.

[0022] By adopting the above technical solution, this application can graft carboxyl groups onto the surface of long-staple cotton fibers through citric acid, maleic acid, and acrylic acid by impregnation.

[0023] On the other hand, the present application provides a small jacquard home textile fabric made of Tianxue cotton, which is made by the above-mentioned preparation method of the small jacquard home textile fabric made of Tianxue cotton.

[0024] One or more technical solutions provided in the present application have at least the following technical effects or advantages:

[0025] 1. In the present application, after loading PCM microcapsules on long-staple cotton fibers, the fibers can absorb, store and release heat, thereby regulating the temperature of the surrounding environment of the fibers. Absorb heat at high temperatures to reduce the perceived temperature; release heat at low temperatures to provide a warming effect. When the ambient temperature rises, the PCM changes from solid to liquid and absorbs heat; when the ambient temperature drops, the PCM changes from liquid to solid and releases heat. The microcapsules of chitin and gelatin encapsulate the PCM inside to prevent its leakage, while allowing heat to be transferred through the outer shell.

[0026] 2. The present application uses chitin microcapsules, which have good moisture retention and biocompatibility, can improve the skin care performance of long-staple cotton fibers, and are thus suitable for use in next-to-skin clothing, reducing skin dryness and irritation. After loading PCM microcapsules, the comfort can be further improved. In an environment with large temperature changes, the relative stability of the human skin temperature can be maintained, reducing heat stress.

[0027] 3. In the present application, the outer shell of the chitin capsule is formed by chitin, and chitin itself has natural antibacterial properties, which can inhibit the growth of bacteria and fungi. The long-staple cotton fibers loaded with chitin microcapsules have a persistent antibacterial effect.

[0028] 4. The method adopted in the present application is different from the co-spinning of chitin fibers and long-staple cotton fibers. The chitin outer shell is cured by a cross-linking agent and has high mechanical strength and chemical stability. The microcapsules and the fibers are combined by electrostatic adsorption to ensure their firm attachment on the fiber surface.

[0029] 5. In the present application, by protonating the amino group of the chitin microcapsules under acidic conditions, the surface of the microcapsules is made to carry a positive charge, and then a small amount of surfactant or dispersant is added to prevent the microcapsules from agglomerating. During the pretreatment process of the long-staple cotton fibers, an anionic modifier is used to treat the fibers. As a result, the surface of the fibers and the microcapsules carry opposite charges, and the microcapsules will be adsorbed on the fiber surface through electrostatic interaction. The microcapsules obtained by the above method are evenly distributed and firmly combined. And the process is environmentally friendly and does not require the use of a large amount of chemical reagents. It not only effectively loads the chitin microcapsules on the long-staple cotton fibers, endowing them with antibacterial and heat preservation functions, but also maintains the original properties of the fibers. Detailed implementation mode

[0030] The present application provides a small jacquard home textile fabric made of Tianxue cotton and its preparation method, which is used to improve the antibacterial effect of the home textile fabric while reducing the influence on the physical properties and warmth retention effect of the home textile fabric after adding antibacterial fibers.

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by the present application.

[0032] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or server including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or modules that are not clearly listed or are inherent to these processes, methods, products, or devices.

[0033] Raw materials

[0034] Long-staple cotton: Long-staple cotton mainly includes Egyptian cotton produced in Egypt, Pima cotton produced in the southwestern United States, Sea Island cotton produced in the southeastern coast of the United States, and Xinjiang long-staple cotton produced in Xinjiang, China. The long-staple cotton in the following embodiments of the present application is Xinjiang long-staple cotton produced in China.

[0035] PCM material: The PCM phase change materials used in the following embodiments of the present application are n-octadecane, n-eicosane, n-docosane, lauric acid, palmitic acid, stearic acid, polyurethane, and polyvinyl alcohol, all of which are currently commercially available.

[0036] Emulsifier: The emulsifiers used in the following embodiments of the present application are Tween 20, Tween 80, Span 20, Span 80, sodium dodecyl sulfate, polyethylene glycol, lecithin, and polyvinyl alcohol, all of which are currently commercially available.

[0037] Crosslinking agent: The crosslinking agents used in the following embodiments of the present application are glutaraldehyde, epichlorohydrin, sodium tripolyphosphate, carbodiimide, and dialdehyde starch, all of which are currently commercially available.

[0038] Detergent: The detergents used in the following embodiments of the present application are sodium dodecylbenzenesulfonate and fatty alcohol polyoxyethylene ether, both of which are currently commercially available.

[0039] Anionic modifier: The anionic modifiers used in the following examples of this application are citric acid, maleic acid, and acrylic acid, all of which are commercially available at present.

[0040] Example

[0041] Example 1

[0042] Preparation of chitin microcapsules

[0043] S1. Preparation of chitin solution: Add 500 g of chitin powder into 2% acetic acid solution, stir until completely dissolved to form a transparent chitin solution; and filter the solution to remove undissolved impurities.

[0044] S2. Preparation of PCM emulsion: Heat 320 g of n-octadecane to 28°C - 35°C to melt it, add 80 g of Tween 20 into the melted n-octadecane, and stir evenly; slowly add the prepared chitin solution into the melted n-octadecane, and perform ultrasonic treatment for 1 h to form an oil-in-water (O / W) emulsion until ensuring the emulsion is uniform and stable.

[0045] S3. Complex coacervation of chitin: Add 48 g of sodium hydroxide (NaOH) solution, and measure the pH of the emulsion, adjust the pH value to 8 to deprotonate the amino group of chitin; dissolve 160 g of gelatin in 500 mL of deionized water to form a transparent solution, and slowly add the gelatin solution into the PCM emulsion with the adjusted pH value, while stirring at a low speed, adjust the pH value of the mixed solution to 4 - 5 to cause complex coacervation between chitin and gelatin to form a microcapsule shell; and continue stirring to ensure that the complex coacervation reaction proceeds fully to obtain a mixed solution of chitin microcapsules.

[0046] S4. Post-treatment of chitin microcapsules: Add glutaraldehyde into the mixed solution of chitin microcapsules, stir at room temperature for 2 h to solidify the chitin shell, and separate the microcapsules by centrifugation to remove unreacted substances; wash the microcapsules 3 times with deionized water to remove residual cross-linking agents and emulsifiers; dry the washed microcapsules at room temperature for 2 h; obtain chitin microcapsules.

[0047] Pretreatment of long-staple cotton fibers

[0048] Soak 800 g of finished long-staple cotton fibers in 2 L of deionized water to remove surface impurities and oils; clean the long-staple cotton fibers with sodium dodecylbenzenesulfonate, and then rinse them with deionized water; add citric acid to treat the long-staple cotton fibers and react at 70°C for 2 hours; after the reaction, rinse the long-staple cotton fibers with deionized water to remove unreacted modifiers, and adjust the pH to 9.

[0049] Electrostatic adsorption of chitin

[0050] 100 g of the chitosan microcapsules coated with phase change materials prepared above were dispersed in deionized water, and ultrasonic treatment was performed to uniformly disperse the microcapsules. The pH of the suspension was adjusted to 6 with a dilute hydrochloric acid solution to make the microcapsules positively charged. Polyethylene glycol was added and ultrasonic treatment was continued to ensure that the suspension was uniform and stable, thereby obtaining a chitosan microcapsule suspension.

[0051] 480 g of pretreated long-staple cotton fiber was immersed in a chitosan microcapsule suspension, and ultrasonic treatment was performed to promote the contact between the microcapsules and the fiber for a controlled time of 5 hours. The long-staple cotton fiber was taken out from the suspension, and gently washed with deionized water to remove the unabsorbed microcapsules; the long-staple cotton fiber was dried at 50°C to obtain modified long-staple cotton fiber.

[0052] Weaving of home textile fabrics

[0053] The modified long-staple cotton fiber is obtained into the yarn of the modified long-staple cotton fiber through the roving process, the spun yarn process, the winding process, the twisting process and the reeling process, which specifically include uniformly stretching the modified long-staple cotton fiber sliver, stretching and thinning, appropriately twisting the stretched sliver to make the yarn have a certain strength, and finally forming; then winding the tube into a bobbin with large capacity, good forming and a certain density, removing some defects and impurities on the yarn, improving the quality of the yarn, and continuing to twist, using two or more single yarns, after merging and twisting, to form a high-strength and well-structured strand, winding the twisted strand on the bobbin to make a tube of a certain size and shape, and then reeling the yarn of the wound bobbin into a hank according to a specified length.

[0054] The yarn of modified long-staple cotton fiber is warped, sizing, threaded, and put on the machine to finally weave the cloth, which specifically includes three types of warping: original yarn warping, colored yarn warping, and partial warping. The warp yarn after warping or dyeing is then hung on the creel of the sizing machine, and passed through three auxiliary accessories such as dropper pieces, healds, and reeds to facilitate the weaving of dropper pieces. In this application, the weaving adopts the multi-arm of a small jacquard loom to control 16 or 20 heald frames to achieve the weaving of home textile fabrics, and then the movement law of the warp is determined by the lifting and lowering of the heald frame by the blade in the multi-arm. Finally, the plain weave is used as the ground structure to obtain a Tianxue cotton small jacquard home textile fabric with a finer and more delicate pattern than the large jacquard fabric.

[0055] Example 2

[0056] The difference between Example 2 and Example 1 is that, in the preparation process of chitosan microcapsules, the selection of PCM material, the selection of emulsifier and the selection of cross-linking agent are different, and the following table is compiled according to different selections.

[0057] Table 1. Raw material composition of chitosan microcapsules

[0058]

[0059] Comparative example

[0060] Comparative example 1

[0061] The difference between Comparative example 1 and Example 1 is that chitin fiber and long-staple cotton fiber are blended and the Tianxue cotton dobby home textile fabric is obtained by weaving.

[0062] Comparative example 2

[0063] The difference between Comparative example 2 and Example 1 is that the Tianxue cotton dobby home textile fabric is directly woven from long-staple cotton fiber without adding other modification methods.

[0064] Comparative example 3

[0065] The difference between Comparative example 3 and Example 1 is that during the preparation of chitin microcapsules, PCM emulsion is not added, and chitin microcapsules are obtained by directly coagulating chitin and gelatin.

[0066] Comparative example 4

[0067] The difference between Comparative example 4 and Example 1 is that during the preparation of chitin microcapsules, PCM emulsion is coated with gelatin and chitin fiber is not added to obtain PCM emulsion microcapsules.

[0068] Comparative example 5

[0069] The difference between Comparative example 5 and Example 1 is that during the pretreatment step of long-staple cotton fiber, the long-staple cotton fiber is not treated with an anionic modifier; during the electrostatic adsorption step of chitin, the pH value of the suspension is not adjusted with dilute hydrochloric acid solution to make the microcapsules positively charged.

[0070] Performance detection test

[0071] To further study the performance parameters of the Tianxue cotton dobby home textile fabric, the following examples are further carried out in this application for verification.

[0072] 1. Fabric abrasion resistance

[0073] The experiment uses the flat friction method to determine the friction mass loss of Tianxue cotton jacquard home textile fabric. The greater the mass loss rate, the better the wear resistance of the fabric. Take the above home textile fabric sample and install it on the flat tester fixture for reciprocating plane friction. The sample fixture can rotate freely around its axis perpendicular to the horizontal plane to determine the wear resistance of the fabric. The inner diameter of the fixture is 95 mm±1mm, and it can firmly clamp a circular sample with an area of ​​100cm. Reciprocating test bench, reciprocating speed 125 times / min±5 times / min, stroke 25mm±2mm. The rotating platform is installed on the reciprocating test bench to fix the flat grinding fixture. For every 100 reciprocating movements of the test bench, the flat fixture just rotates around its central axis. The wear resistance of the home textile fabric is tested for 100, 300, and 800 turns in turn, and the mass loss percentage is calculated and sorted into the following table.

[0074] 2. Fabric mechanical properties

[0075] Fabric tensile strength refers to the phenomenon that the fabric will break when it is subjected to a certain tensile load. It is tested using a fabric strength testing machine under standard atmospheric conditions (temperature is (20±2)℃, relative humidity is (65±2)%. For each sample, 5 50×200mm fabrics are cut in the longitudinal and transverse directions. The fabric clamping distance is set to 15mm and the stretching speed is 100mm / min. Record the experimental results, take the average value, and organize them into the following table.

[0076] 3. Fabric bursting performance

[0077] Bursting refers to the phenomenon that a part of a fabric is damaged by an external force perpendicular to the plane of the fabric. The higher the bursting strength, the better the bursting performance of the fabric. Take a piece of the home textile fabric prepared above, cut 5 specimens, mark the front and back sides, clamp the specimen with the back side facing up on the clamp to ensure that the specimen is flat, tension-free, and wrinkle-free, and select a steel ball with a diameter of 25mm. Install the push rod and the clamp on the tester, push the push rod downward at 300mm / min to break the specimen, and test five groups, record the force value and take the average value, and organize it into the following table.

[0078] 4. Antibacterial performance test: According to the standard test method, the antibacterial test was conducted on Tianxue cotton jacquard home textile fabrics. The inoculated bacteria were Staphylococcus aureus and Escherichia coli. The sterilization rate was calculated by counting the number of surviving bacteria. The concentration of Staphylococcus aureus in this test was 1.50×106 CFU, and the concentration of Escherichia coli in this test was 3.76×106 CFU; the average sterilization rate was integrated into the following table.

[0079] 5. Thermal insulation performance test: The test shall be carried out in accordance with the "Test Method for Thermal Insulation Performance of Textiles". The flat-plate constant temperature difference heat dissipation method shall be adopted to calculate the percentage of the difference between the heat dissipation when there is no sample and the heat dissipation when there is a sample and the ratio of the heat dissipation when there is no sample.

[0080] 6. Heat transfer performance detection: Detect according to the "Test Method for Heat Transfer Performance of Textiles - Plate Method" to obtain the heat transfer coefficient.

[0081] Table 2. Performance detection experimental table of Examples 1 - 11 and Comparative Examples 1 - 5

[0082]

[0083] According to Examples 1 - 11, it can be obtained that Example 10 is the optimal example, in which the PCM material is selected as n - eicosane, the emulsifier is selected as sodium dodecyl sulfate, and the cross - linker is selected as glutaraldehyde. It can be obtained that it has better fabric wear resistance, more excellent fabric mechanical properties, and strong fabric bursting strength. At the same time, its antibacterial performance and heat preservation performance have more excellent performances.

[0084] In addition, through the analysis between Example 10 and Comparative Example 1, in Comparative Example 1, chitin fiber and long - staple cotton fiber are blended and spun to obtain Tianxue cotton small jacquard home textile fabric through weaving. Therefore, the physical properties of the comparative example are worse than those of Example 10. Although it has a similar antibacterial effect, its heat preservation effect is worse.

[0085] And through the analysis of Comparative Example 2, Tianxue cotton small jacquard home textile fabric is directly woven from long - staple cotton fiber without adding other modification methods. Its mechanical properties are improved compared with Comparative Example 1, but its antibacterial effect is not good, and its heat preservation effect is improved compared with Comparative Example 1. Moreover, its heat preservation effect has a gap compared with the examples, which is because phase change materials are added in the examples. And it can be obtained from the comparative analysis with Comparative Example 3.

[0086] In Comparative Example 3, during the preparation process of chitin microcapsules, PCM emulsion is not added, and chitin and gelatin are directly coagulated to obtain chitin microcapsules.

[0087] Similarly, in the preparation process of chitin microcapsules in Comparative Example 4, the PCM emulsion is coated with gelatin without adding chitin fiber to obtain PCM emulsion microcapsules. It cannot have a stronger antibacterial effect.

[0088] This is mainly because after loading PCM microcapsules on long-staple cotton fibers, they can absorb, store, and release heat, thereby regulating the temperature of the surrounding environment of the fibers. And the microcapsules of chitin and gelatin wrap the PCM inside to prevent its leakage, while allowing heat to be transferred through the outer shell. In addition, the chitin microcapsules have good moisture retention and biocompatibility, which can improve the skin care performance of long-staple cotton fibers, maintain the relative stability of the human skin temperature in an environment with large temperature changes, and reduce heat stress. Moreover, the outer shell of the chitin capsule is formed by chitin, and chitin itself has natural antibacterial properties, which can inhibit the growth of bacteria and fungi. The long-staple cotton fibers loaded with chitin microcapsules have a persistent antibacterial effect.

[0089] Finally, compared with Comparative Example 5, in the pretreatment step of long-staple cotton fibers in Comparative Example 5, the long-staple cotton fibers were not treated with an anionic modifier; in the electrostatic adsorption step of chitin, the pH value of the suspension was not adjusted with dilute hydrochloric acid solution to make the microcapsules carry a positive charge. It is impossible to fix the chitin microcapsules on the long-staple cotton fibers, and it is difficult to endow them with antibacterial and heat preservation functions while maintaining the original properties of the fibers.

[0090] In addition, in the pretreatment process of long-staple cotton fibers in this application, the neutral detergents used are sodium dodecylbenzenesulfonate and fatty alcohol polyoxyethylene ether. Among them, neutral surfactants are used for washing, and detergents containing strong acids, strong bases, or bleaching components are avoided to prevent damage to the softness and strength of long-staple cotton fibers. Better experimental results are obtained by using sodium dodecylbenzenesulfonate.

[0091] In addition, the anionic modifier includes one or more of citric acid, maleic acid, and acrylic acid. Carboxyl groups can be grafted onto the surface of long-staple cotton fibers by impregnation with citric acid, maleic acid, and acrylic acid. Among them, citric acid has better physical properties and better environmental protection.

[0092] It should be noted that the above-mentioned sequence of embodiments of this application is only for description and does not represent the superiority or inferiority of the embodiments. And the above description of specific embodiments of this specification is made. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0093] The above are only the preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

[0094] This specification is merely an exemplification of the present application and is considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalent technologies, the present application is intended to include these changes and modifications therein.

Claims

1. A method for preparing a Tianxue cotton jacquard home textile fabric, characterized in that: The following steps are involved: Preparation of chitosan microcapsules, pretreatment of long-staple cotton fibers, electrostatic adsorption of chitosan, and weaving of home textile fabrics; The preparation process of the chitosan microcapsules includes the following steps: S1. Preparation of chitosan solution: dissolving chitosan powder in acetic acid solution, and filtering the solution to remove impurities to form a chitosan solution; S2. Preparation of PCM emulsion: heating and melting the PCM material, then adding an emulsifier and stirring evenly; slowly adding the chitosan solution into the melted PCM material, stirring at high speed or ultrasonic treatment to form an oil-in-water emulsion; S3, complex coagulation of chitosan, adding sodium hydroxide solution, and adjusting the pH value of the solution to deprotonate the amino group of chitosan; dissolving gelatin in deionized water to form a transparent solution, and slowly adding the gelatin solution to the PCM emulsion to cause complex coagulation of chitosan and gelatin to obtain a mixed solution of chitosan microcapsules; S4, post-treatment of chitosan microcapsules: adding a cross-linking agent to the mixed solution of chitosan microcapsules, and stirring at room temperature to solidify the chitosan shell; Washing the microcapsules with deionized water for multiple times to remove residual crosslinking agent and emulsifier; drying the washed microcapsules at room temperature to obtain chitosan microcapsules; The pretreatment of the long-staple cotton fiber comprises the following steps: soaking the long-staple cotton fiber in deionized water to remove impurities and grease on the surface; washing the fiber with a detergent and then rinsing it with deionized water; adding an anionic modifier to treat the fiber and reacting it at 50-70° C. for 1-2 hours; after the reaction is completed, rinsing the long-staple cotton fiber with deionized water to remove unreacted modifiers and adjusting the pH to be greater than 8; The electrostatic adsorption of chitosan comprises the following steps: dispersing the chitosan microcapsules in a buffer solution, and using ultrasonic treatment to make the microcapsules uniformly dispersed, and using a dilute hydrochloric acid solution to adjust the pH value of the suspension so that the microcapsules are positively charged, and adding a surfactant and a dispersant, and continuing to stir or ultrasonically treat to ensure that the suspension is uniform and stable, so as to obtain a chitosan microcapsule suspension; The pretreated long-staple cotton fiber is immersed in the chitosan microcapsule suspension, and ultrasonic treatment is performed to promote the contact between the microcapsule and the fiber for a controlled time of 1-5 hours. The long-staple cotton fiber is taken out from the suspension, and gently washed with deionized water to remove the unabsorbed microcapsules; the long-staple cotton fiber is dried at 40-70° C. to obtain the modified long-staple cotton fiber.

2. The method for preparing the Tianxue cotton jacquard home textile fabric according to claim 1, characterized in that: The weaving of the home textile fabric comprises the following steps: The modified long-staple cotton fiber is subjected to a roving process, a spun yarn process, a bobbin winding process, a twisting process, and a reeling process to obtain the modified long-staple cotton fiber yarn; the modified long-staple cotton fiber yarn is subjected to warping, sizing, drawing in, and weaving to finally complete the weaving, and the weaving adopts a dobby-arm control of a small jacquard loom with 16 or 20 heald frames to achieve the weaving of home textile fabrics.

3. The method for preparing the Tianxue cotton jacquard home textile fabric according to claim 1, characterized in that: In the preparation process of the PCM emulsion, the PCM material includes one or more of n-octadecane, n-eicosane, n-docosane, lauric acid, palmitic acid, stearic acid, polyurethane, and polyvinyl alcohol.

4. The method for preparing the Tianxue cotton jacquard home textile fabric according to claim 1, characterized in that: In the preparation process of the PCM emulsion, the emulsifier includes one or more of Tween 20, Tween 80, Span 20, Span 80, sodium lauryl sulfate, polyethylene glycol, lecithin, and polyvinyl alcohol.

5. The method for preparing the Tianxue cotton jacquard home textile fabric according to claim 1, characterized in that: In the post-treatment of the chitosan microcapsules, the cross-linking agent includes one or more of glutaraldehyde, epichlorohydrin, sodium tripolyphosphate, carbodiimide, and dialdehyde starch.

6. The method for preparing the Tianxue cotton jacquard home textile fabric according to claim 1, characterized in that: The detergent comprises one or more of sodium dodecylbenzene sulfonate and fatty alcohol polyoxyethylene ether.

7. The method for preparing the Tianxue cotton dobby home textile fabric according to claim 1, characterized in that: The anion modifier includes one or more of citric acid, maleic acid, and acrylic acid.

8. A Tianxue cotton jacquard home textile fabric, characterized in that: The fabric is made by the preparation method of the Tianxue cotton jacquard home textile fabric as described in any one of claims 1 to 7.

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