A supercritical lightweight fabric and its production method

Abstract

The application belongs to the technical field of fabrics, and specifically discloses a supercritical lightweight fabric and a production method thereof.The supercritical lightweight fabric is woven by warp and weft, wherein a supercritical polymer foaming fiber is used as the warp, and a bamboo charcoal fiber is used as the weft.The preparation method of the bamboo charcoal fiber comprises the following steps: dispersing the bamboo charcoal fiber in a salicylic acid solution, stirring, washing with water, dispersing in a sodium carbonate solution again, stirring, washing with water again, dispersing in deionized water again, adding carbon nanotube composite titanium dioxide nanowires and tea polyphenol composite chitosan, stirring at a temperature of 60-65 DEG C, and drying to obtain the bamboo charcoal fiber.The various raw materials are mixed in the application, and the obtained fabric has good mechanical properties, wear resistance and durability.

Description

Technical Field

[0001] This application relates to the technical field of fabrics, and in particular to a supercritical lightweight fabric and its production method. Background Technology

[0002] Fabric is the material used to make clothing. As one of the three essential elements of clothing, fabric not only possesses durability and washability but also presents the color and style of different garments. With people's increasing pursuit of clothing diversity, the requirements for fabric types are also becoming more demanding. Fabrics can be categorized by function, including linen blends and antibacterial and stain-resistant composite fabrics. Linen blends improve the wrinkle resistance and softness of linen, while antibacterial and stain-resistant composite fabrics enhance antibacterial and stain-resistant properties. Different types of fabrics serve different purposes.

[0003] Supercritical lightweight fabric is a type of fabric with special properties made using supercritical foaming technology. It involves injecting supercritical gas into a polymer material, allowing the gas to mix and diffuse thoroughly with the molten raw material to form a single-phase mixed sol. By adjusting parameters such as temperature and pressure, a large pressure drop is generated in the sol, causing the gas to precipitate and form a large number of bubble nuclei. During the subsequent cooling and molding process, the bubble nuclei continuously grow and take shape, ultimately resulting in a lightweight material with a microporous structure.

[0004] Supercritical lightweight fabrics have the advantages of being lightweight, having excellent chemical resistance and high resilience. However, the microporous structure makes the material surface more susceptible to being punctured or torn by sharp objects. After long-term friction, the edges of the pores will be damaged, which will affect the durability of the fabric. Summary of the Invention

[0005] To address the issue of edge damage in fabrics during long-term use, this application provides a supercritical lightweight fabric and its production method.

[0006] This application provides a supercritical lightweight fabric, which adopts the following technical solution:

[0007] A supercritical lightweight fabric is woven from warp and weft threads, using supercritical polymer foamed fiber as the warp and bamboo charcoal fiber as the weft. The preparation method of the bamboo charcoal fiber includes the following steps: dispersing bamboo charcoal fiber in a salicylic acid solution, stirring for 4-6 minutes, washing with water, then dispersing it in a sodium carbonate solution, stirring for 3-5 minutes, washing with water, then dispersing it in deionized water, adding carbon nanotube composite titanium dioxide nanowires and tea polyphenol composite chitosan, stirring at a temperature of 60-65℃ for 1-2 hours, and drying to obtain bamboo charcoal fiber.

[0008] By adopting the above technical solution, the supercritical lightweight fabric is woven from warp and weft threads, with supercritical polymer foamed fibers as the warp. Supercritical fluid forms uniform micropores in the polymer, and the fiber density is greatly reduced after foaming, resulting in better porosity and reducing the overall weight of the fabric. The foamed fibers still have good tensile strength, breathability, high resilience and heat insulation.

[0009] In the preparation method of bamboo charcoal fiber, salicylic acid dissolves the amorphous carbon layer on the surface of bamboo charcoal fiber, exposing more microporous structures and increasing the specific surface area. Sodium carbonate solution further erodes the surface of bamboo charcoal fiber, increasing the micropore size and making the surface of bamboo charcoal fiber negatively charged, which helps the subsequent adsorption of carbon nanotubes combined with titanium dioxide nanowires and tea polyphenols combined with chitosan.

[0010] Carbon nanotube-composite titanium dioxide nanowires possess photocatalytic antibacterial properties, mechanical properties, and wear resistance. They can adsorb within the micropores and on the surface of bamboo charcoal fibers. After treatment with sodium carbonate, the surface of bamboo charcoal fibers mainly contains carboxylic acid groups and hydroxyl groups. The surface of the carbon nanotube-composite titanium dioxide nanowires contains hydroxyl, carboxyl, and Ti-OH groups. The two are bonded through electrostatic interactions and hydrogen bonds, increasing the mechanical properties, antibacterial properties, adsorption capacity, and durability of the bamboo charcoal fibers. The hydroxyl groups of the sugar rings in the tea polyphenol-chitosan composite are bridged with the hydroxyl groups on the fiber surface by water molecules, forming a three-dimensional hydrogen bond network. The catechol in tea polyphenols forms double hydrogen bonds with the hydroxyl groups on the fiber surface, and the hydroxyl groups on the surface of the carbon nanotube-composite titanium dioxide nanowires form five-membered ring chelates with the catechol in tea polyphenols. This allows the carbon nanotube-composite titanium dioxide nanowires to be firmly adsorbed on the surface of the bamboo charcoal fibers, further improving the performance stability of the prepared bamboo charcoal fibers and enhancing their mechanical properties, wear resistance, and durability. Subsequent weaving with supercritical polymer foam fibers improves the abrasion resistance, mechanical properties, and durability of the supercritical lightweight fabric.

[0011] Preferably, the mass ratio of the bamboo charcoal fiber, carbon nanotube composite titanium dioxide nanowire, and tea polyphenol composite chitosan is 1:0.6-0.7:0.2-0.3.

[0012] By employing the above technical solution and further limiting the mass ratio of bamboo charcoal fiber, carbon nanotube composite titanium dioxide nanowires, and tea polyphenol composite chitosan, the resulting bamboo charcoal fiber exhibits excellent mechanical properties, abrasion resistance, and durability. The carbon nanotube composite titanium dioxide nanowires possess good adsorption capacity and mechanical strength, enabling them to adsorb onto the surface and within the pores of the bamboo charcoal fiber, thus improving its mechanical properties and abrasion resistance. The functional groups in the tea polyphenol composite chitosan can mutually adsorb with the functional groups in the bamboo charcoal fiber and the carbon nanotube composite titanium dioxide nanowires, forming a three-dimensional network. This further improves the structural stability of the bamboo charcoal fiber, thereby enhancing its mechanical properties and abrasion resistance. Subsequent application in fabrics further improves the mechanical properties and abrasion resistance of the fabrics.

[0013] Preferably, titanium dioxide nanoparticles, carbon nanotubes, and sodium dodecylbenzenesulfonate are dispersed in deionized water, sonicated for 30-35 minutes, filtered, added to sodium hydroxide solution, and hydrothermally reacted at 120-130℃ for 5-6 hours. After the reaction is completed, the mixture is centrifuged, washed repeatedly with dilute hydrochloric acid and water until neutral, freeze-dried, and then calcined at 500-510℃ under a nitrogen atmosphere for 2-3 hours to obtain carbon nanotube-titanium dioxide nanowires.

[0014] Carbon nanotube-titanium dioxide nanowires were dispersed in deionized water, and polyvinylpyrrolidone and sodium alginate were added. The mixture was stirred at 80-85℃ for 1-2 hours and then dried to obtain carbon nanotube-titanium dioxide nanowires.

[0015] By employing the above technical solution, titanium dioxide nanoparticles, as a precursor, recrystallize into nanowires under hydrothermal conditions. Carbon nanotubes provide a one-dimensional framework, forming heterojunctions with TiO2 through π-π stacking, thereby enhancing the structural strength of the titanium dioxide nanoparticles. Sodium dodecylbenzenesulfonate improves the dispersibility of the titanium dioxide nanoparticles and carbon nanotubes, preventing agglomeration. In sodium hydroxide solution, the carboxyl groups on the surface of carbon nanotubes form Ti-OC bonds with the TiO2 precursor, guiding TiO2 to grow along the axial direction of the carbon nanotubes, forming a "CNT core-TiO2 shell" structure, which improves the structural strength of the carbon nanotube-titanium dioxide nanowires. Calcination removes sodium dodecylbenzenesulfonate and organic residues, promoting the perfection of the TiO2 crystal form and further enhancing the structural strength of the carbon nanotube-titanium dioxide nanowires.

[0016] Polyvinylpyrrolidone improves the dispersibility of carbon nanotube-titanium dioxide nanowires and prevents agglomeration. The carboxyl group of sodium alginate forms hydrogen bonds with the hydroxyl group on the TiO2 surface to form a continuous gel layer. After drying, it enhances the mechanical strength and wear resistance of the nanowires and imparts hydrophilicity. This helps to combine with bamboo charcoal fiber to improve the corresponding properties of bamboo charcoal fiber.

[0017] Preferably, the mass ratio of the titanium dioxide nanoparticles, carbon nanotubes and sodium alginate is 1:0.6-0.7:0.2-0.3.

[0018] By employing the above technical solution, the mass ratio of titanium dioxide nanoparticles, carbon nanotubes, and sodium alginate is further limited within a certain range, thereby improving the mechanical properties and structural strength of titanium dioxide nanoparticles. Titanium dioxide nanoparticles possess a large number of hydroxyl groups on their surface, exhibiting high specific surface area and chemical activity. Carbon nanotubes possess excellent mechanical strength, serving as a framework that allows TiO2 to grow along the axial direction of the carbon nanotubes, forming a "CNT core-TiO2 shell" structure. Sodium alginate molecular chains contain a large number of carboxyl and hydroxyl groups, exhibiting good water solubility and readily forming a gel network. This can coat the carbon nanotube-titanium dioxide nanowire structure, improving the tensile strength and toughness of the carbon nanotube-titanium dioxide nanowire composite. Subsequent mixing with bamboo charcoal fiber enhances the corresponding properties of the bamboo charcoal fiber, thereby improving the overall performance of the fabric.

[0019] Preferably, the preparation method of the tea polyphenol complex chitosan includes the following steps: dispersing chitosan in acetic acid solution, adding tea polyphenols, and stirring at room temperature for 25-30 minutes to obtain a mixture;

[0020] Hydroxypropyl starch was dispersed in deionized water and stirred evenly at 50-55℃. Silica and 3-aminopropyltriethoxysilane were added, and stirring was continued for 1-2 hours. The mixture was then dried to obtain the final product.

[0021] The mixture is added to the liquid mixture and stirred at 60-65℃ for 2-3 hours. After drying, tea polyphenol complex chitosan is obtained.

[0022] By adopting the above technical solution, chitosan is dissolved in acetic acid solution, and the amino groups are protonated to form a transparent viscous solution. When tea polyphenols are added, the phenolic hydroxyl groups of tea polyphenols and the amino groups of chitosan are combined through hydrogen bonds to form a stable complex, which improves the film-forming properties of chitosan.

[0023] After hydroxypropyl starch dissolves in hot water at 50-55℃, its molecular chains unfold to form a flexible colloidal network. The introduction of hydroxypropyl groups improves the water solubility and flexibility of the starch. Silica has excellent mechanical properties and wear resistance, and is dispersed in the starch aqueous solution. After the ethoxy groups of 3-aminopropyltriethoxysilane hydrolyze, they combine with the hydroxyl groups on the surface of SiO2, exposing the amino groups on the surface. These amino groups then combine with the hydroxypropyl starch, making the complex structure stable and increasing the mechanical properties, adsorption properties, and wear resistance of the complex. This will help to combine with bamboo charcoal fiber, carbon nanotubes, and titanium dioxide nanowires, thereby improving the overall performance of bamboo charcoal fiber.

[0024] Preferably, the mass ratio of chitosan, silica, and hydroxypropyl starch is 1:0.4-0.5:0.1-0.2.

[0025] By adopting the above technical solution and further limiting the mass ratio of chitosan, silica, and hydroxypropyl starch within a certain range, the resulting tea polyphenol-chitosan composite exhibits excellent mechanical properties, adsorption capacity, and stability. Silica possesses excellent mechanical properties and wear resistance, chitosan exhibits excellent film-forming properties, and hydroxypropyl starch exhibits excellent adhesive properties. SiO2 is uniformly dispersed in the chitosan matrix, enhancing the tensile strength of the material through physical filling and stress transfer effects. The hydroxyl groups of hydroxypropyl starch form a hydrogen bond network with the amino groups of chitosan, strengthening intermolecular forces, reducing crack propagation, and improving the toughness and impact resistance of the material. This material can then be applied to bamboo charcoal fiber to improve its corresponding properties.

[0026] Preferably, the method for preparing the supercritical polymer foamed fiber includes the following steps:

[0027] Thermoplastic elastomer, EVA, talc, epoxy chain extender, and hindered phenolic antioxidant are mixed, melt-extruded, and dried to obtain filaments;

[0028] The filament is impregnated with a supercritical fluid, and after impregnation, it is sealed at a low temperature to obtain the impregnated filament.

[0029] The impregnated filaments are heated to foam, shaped, and stretched to obtain foamed fibers.

[0030] By employing the above technical solutions, thermoplastic polyester elastomers offer high elasticity and fatigue resistance. EVA (ethylene-vinyl acetate copolymer) improves processing fluidity, lowers melting temperature, and enhances flexibility. Talc acts as a nucleating agent, promoting uniform cell formation during foaming and reducing cell coalescence. Epoxy chain extenders enhance inter-chain crosslinking, increase melt strength, and prevent cell rupture during foaming. Hindered phenolic antioxidants inhibit thermal oxidative degradation during high-temperature processing, maintaining stable material properties.

[0031] Supercritical fluid ensures uniform gas release during foaming, forming a microporous structure. Rapid cooling "locks" gas molecules within the polymer matrix, preventing premature escape and ensuring optimal foaming performance. Shaping and stretching optimize molecular chain orientation, enhancing fiber strength, resulting in foamed fibers with good tensile strength and resilience.

[0032] Preferably, the heating and foaming temperature is 220-230℃, the setting temperature is 120-130℃, and the constant-speed stretching speed is 5-5.5m / min.

[0033] By adopting the above technical solutions and limiting the process parameters of heating and foaming, tunnel shaping, dwell time, and constant speed stretching, the production process of supercritical lightweight fabrics has been optimized, ensuring the fabric's lightweight, high strength, and high resilience properties.

[0034] Preferably, the fabric has a warp density of 100-110 threads / inch and a weft density of 70-80 threads / inch.

[0035] By adopting the above technical solution and limiting the warp and weft densities, the resulting fabric has good breathability and mechanical properties.

[0036] Secondly, this application also provides a method for producing supercritical lightweight fabric, comprising the following steps: twisting one or more strands of supercritical polymer foamed fiber into yarn, twisting one or more strands of bamboo charcoal fiber into weft yarn, and weaving the warp and weft yarns into supercritical lightweight fabric using a satin weave process.

[0037] By employing the above technical solution, a microporous structure is formed in the polymer using supercritical fluid. Rapid pressure release causes the polymer to expand, creating lightweight, highly resilient fibers. One or more strands of supercritical polymer foam fibers are twisted into yarn, balancing strength and flexibility. One or more strands of bamboo charcoal fibers are twisted into weft yarn, ensuring the stability of the functional layer. The resulting fabric possesses lightweight yet high strength, breathability and antibacterial properties, durability and comfort.

[0038] In summary, this application has the following beneficial effects:

[0039] 1. The supercritical lightweight fabric in this application is woven from warp and weft threads, with supercritical polymer foamed fibers as the warp. Supercritical fluid forms uniform micropores in the polymer, and the fiber density is greatly reduced after foaming, resulting in better porosity and reducing the overall weight of the fabric. The foamed fibers still have good tensile strength, air permeability, high resilience and heat insulation.

[0040] 2. In this application, the hydroxyl groups of the sugar ring in the tea polyphenol composite chitosan are bridged with the hydroxyl groups on the fiber surface by water molecules to form a three-dimensional hydrogen bond network. The catechol in the tea polyphenol forms double hydrogen bonds with the hydroxyl groups on the fiber surface. The hydroxyl groups on the surface of the carbon nanotube composite titanium dioxide nanowire form a five-membered ring chelate with the catechol in the tea polyphenol. This allows the carbon nanotube composite titanium dioxide nanowire to be firmly adsorbed on the surface of the bamboo charcoal fiber, further improving the performance stability of the prepared bamboo charcoal fiber and enhancing its mechanical properties, wear resistance, and durability.

[0041] 3. The sodium alginate molecular chain in this application contains a large number of carboxyl and hydroxyl groups, which can easily form a gel network, thereby coating the carbon nanotube-titanium dioxide nanowire structure, improving the tensile strength and toughness of the carbon nanotube-titanium dioxide nanowire composite, and subsequently mixing with bamboo charcoal fiber to improve the corresponding properties of bamboo charcoal fiber, thereby improving the overall performance of the fabric. Detailed Implementation

[0042] The present application will be further described in detail below with reference to the embodiments.

[0043] The raw materials used in the examples and comparative examples are all commercially available.

[0044] Preparation Example 1

[0045] The preparation method of carbon nanotube composite titanium dioxide nanowires includes the following steps:

[0046] 1 kg of titanium dioxide nanoparticles, carbon nanotubes, and 0.2 kg of sodium dodecylbenzenesulfonate were dispersed in 75 L of deionized water, sonicated for 33 min, filtered, and added to 20 L of 10 mol / L sodium hydroxide solution. The mixture was then hydrothermally reacted at 120 °C for 6 h. After the reaction was completed, the mixture was centrifuged, washed repeatedly with 10% dilute hydrochloric acid and water until neutral, freeze-dried, and calcined at 500 °C under a nitrogen atmosphere for 2 h to obtain carbon nanotube-titanium dioxide nanowires.

[0047] Carbon nanotube-titanium dioxide nanowires were dispersed in 60L of deionized water, and 0.4kg of polyvinylpyrrolidone and sodium alginate were added. The mixture was stirred at 82℃ for 1.5h and then dried to obtain carbon nanotube-titanium dioxide nanowires.

[0048] The mass ratio of titanium dioxide nanoparticles, carbon nanotubes, and sodium alginate is 1:0.6:0.3.

[0049] Preparation Example 2

[0050] The difference from Preparation Example 1 is that no carbon nanotubes are added.

[0051] Preparation Example 3

[0052] The difference from Preparation Example 1 is that sodium alginate is not added.

[0053] Preparation Example 4

[0054] The difference from Preparation Example 1 is that the mass ratio of titanium dioxide nanoparticles, carbon nanotubes and sodium alginate is 1:0.7:0.2.

[0055] Preparation Example 5

[0056] The difference from Preparation Example 1 is that the mass ratio of titanium dioxide nanoparticles, carbon nanotubes and sodium alginate is 1:0.1:0.6.

[0057] Preparation Example 6

[0058] The preparation method of tea polyphenol complex chitosan includes the following steps: 2 kg of chitosan is dispersed in 20 L of acetic acid solution with a mass fraction of 5%, 0.6 kg of tea polyphenols is added, and the mixture is stirred at room temperature for 28 min to obtain a mixed solution;

[0059] Hydroxypropyl starch was dispersed in 30 L of deionized water and stirred evenly at 52 °C. Silica and 0.8 kg of 3-aminopropyltriethoxysilane were added, and stirring was continued for 1.5 h. The mixture was then dried to obtain the final product.

[0060] The mixture was added to the liquid mixture and stirred at 64°C for 2.5 hours. After drying, tea polyphenols and chitosan were obtained.

[0061] The mass ratio of chitosan, silica, and hydroxypropyl starch is 1:0.4:0.2.

[0062] Preparation Example 7

[0063] The difference from Preparation Example 6 is that no silicon dioxide is added.

[0064] Preparation Example 8

[0065] The difference from Preparation Example 6 is that hydroxypropyl starch is not added.

[0066] Preparation Example 9

[0067] The difference from Preparation Example 8 is that the mass ratio of chitosan, silica, and hydroxypropyl starch is 1:0.5:0.1.

[0068] Preparation Example 10

[0069] The difference from Preparation Example 6 is that the mass ratio of chitosan, silica, and hydroxypropyl starch is 1:0.05:0.4.

[0070] Example 1 A supercritical lightweight fabric, woven from warp and weft threads, using supercritical polymer foamed fiber as the warp and bamboo charcoal fiber as the weft. The preparation method of bamboo charcoal fiber includes the following steps: 5 kg of bamboo charcoal fiber is dispersed in 20 L of 0.1 mol / L salicylic acid solution, stirred for 5 min, washed with water, then dispersed in 20 L of 0.7 mol / L sodium carbonate solution, stirred for 4 min, washed with water, then dispersed in 30 L of deionized water, carbon nanotube composite titanium dioxide nanowires and tea polyphenol composite chitosan are added, stirred at 65℃ for 2 h, and dried to obtain bamboo charcoal fiber.

[0071] The mass ratio of bamboo charcoal fiber, carbon nanotube composite titanium dioxide nanowire, and tea polyphenol composite chitosan is 1:0.7:0.2.

[0072] The preparation method of supercritical polymer foamed fibers includes the following steps:

[0073] 50 kg of thermoplastic elastomer TPEE, 20 kg of EVA, 4 kg of talc, 0.8 kg of epoxy chain extender (chain extender ADR-4380), and 0.5 kg of hindered phenolic antioxidant (antioxidant 1010) were mixed, melt-extruded at 220℃, and dried to obtain filaments with a diameter of 1.92 mm.

[0074] The filament was impregnated with a supercritical fluid (supercritical CO2 fluid), and after impregnation, it was cryogenically sealed to obtain the impregnated filament. The solubility of the supercritical fluid in the filament was 0.5 wt.%, and the cryogenic sealing temperature was 0℃.

[0075] The impregnated filaments are heated to foam, shaped in a tunnel, and stretched at a constant speed to obtain foamed fibers.

[0076] The heating and foaming temperature is 220℃, the shaping temperature in the tunnel is 120℃, the residence time in the tunnel is 3s, and the constant speed stretching speed is 5m / min.

[0077] The warp density is 100 threads / inch, and the weft density is 80 threads / inch.

[0078] The production method of the above-mentioned supercritical lightweight fabric includes the following steps:

[0079] Three strands of supercritical polymer foamed fibers are twisted into yarn, and three strands of bamboo charcoal fibers are twisted into weft. The warp and weft are then woven into a supercritical lightweight fabric using a satin weave process.

[0080] The carbon nanotube composite titanium dioxide nanowires were prepared using Preparation Example 1, and the tea polyphenol composite chitosan was prepared using Preparation Example 6.

[0081] Example 2: A supercritical lightweight fabric, which differs from Example 1 in that the mass ratio of bamboo charcoal fiber, carbon nanotube composite titanium dioxide nanowire, and tea polyphenol composite chitosan is 1:0.6:0.3.

[0082] Example 3: A supercritical lightweight fabric, which differs from Example 1 in that the mass ratio of bamboo charcoal fiber, carbon nanotube composite titanium dioxide nanowire, and tea polyphenol composite chitosan is 1:0.2:0.9.

[0083] Example 4: A supercritical lightweight fabric, which differs from Example 1 in that the carbon nanotube composite titanium dioxide nanowires are prepared using Preparation Example 2.

[0084] Example 5: A supercritical lightweight fabric, which differs from Example 1 in that the carbon nanotube composite titanium dioxide nanowires are prepared using Preparation Example 3.

[0085] Example 6: A supercritical lightweight fabric, which differs from Example 1 in that the carbon nanotube composite titanium dioxide nanowires are prepared using Preparation Example 4.

[0086] Example 7: A supercritical lightweight fabric, which differs from Example 1 in that the carbon nanotube composite titanium dioxide nanowires are prepared using Preparation Example 5.

[0087] Example 8: A supercritical lightweight fabric, which differs from Example 1 in that the tea polyphenols and chitosan are prepared using Preparation Example 7.

[0088] Example 9: A supercritical lightweight fabric, which differs from Example 1 in that the tea polyphenols and chitosan are prepared using Preparation Example 8.

[0089] Example 10: A supercritical lightweight fabric, which differs from Example 9 in that the tea polyphenols and chitosan are prepared using the method described in Example 9.

[0090] Example 11: A supercritical lightweight fabric, which differs from Example 9 in that the tea polyphenols and chitosan are prepared using Preparation Example 10.

[0091] Comparative Example 1

[0092] A supercritical lightweight fabric, which differs from Example 1 in that it does not contain carbon nanotube composite titanium dioxide nanowires.

[0093] Comparative Example 2

[0094] A supercritical lightweight fabric, which differs from Example 1 in that it does not contain tea polyphenols and chitosan.

[0095] The performance testing was conducted on the supercritical lightweight fabrics prepared in Examples 1-11 and Comparative Examples 1-2.

[0096] Tensile strength: Tested in accordance with GB / T 3923.1-1997 "Determination of tensile strength and elongation at break of fabrics - strip method".

[0097] Abrasion resistance: The test was conducted in accordance with GB / T 21196.2-2007 "Textiles - Martindale Method - Determination of Abrasion Resistance of Fabrics - Part 2: Determination of Specimen Breakage". The friction load was set to 1000g, and the sample was continuously rubbed until it was worn. The number of revolutions of the abrasion tester was then measured.

[0098] The elastic recovery rate was tested according to standard FZ / T 01034-2008 "Tension elasticity test method for woven textiles". The pre-tension was 1N, the constant load was 25N, the interval was 100mm, the rising speed was 180mm / min, and the falling speed was 120mm / min. Each type of fabric was tested three times in both the warp and weft directions, and the average value was taken. The test results are shown in Table 1.

[0099] Table 1 Test data for the examples and comparative examples

[0100]

[0101] As can be seen from Table 1, the supercritical lightweight fabrics prepared in Examples 1-2 of this application have good mechanical properties, abrasion resistance, and mechanical strength. Among them, Example 1 has a radial breaking strength of 990N, a weft breaking strength of 850N, an abrasion resistance of 65,000 cycles, a radial elastic recovery rate of 95.3%, and a weft elastic recovery rate of 96.8%. It can be seen that the supercritical lightweight fabrics prepared in this application have good strength, toughness, and abrasion resistance. The various components work together to improve the mechanical properties of the supercritical lightweight fabrics and extend the durability of the fabrics.

[0102] Example 3 altered the mass ratio of bamboo charcoal fiber, carbon nanotube composite titanium dioxide nanowires, and tea polyphenol composite chitosan. Comparative Examples 1-2 did not include carbon nanotube composite titanium dioxide nanowires or tea polyphenol composite chitosan, respectively. Table 1 shows that the radial / weft breaking strength, abrasion resistance, and radial / weft elastic recovery rate of Example 3 were significantly worse than those of Examples 1-2. Similarly, the corresponding test results of Comparative Examples 1-2 were significantly worse than those of Examples 1-3. This indicates that omitting carbon nanotube composite titanium dioxide nanowires or tea polyphenol composite chitosan significantly reduces the abrasion resistance, mechanical properties, and durability of the supercritical lightweight fabric. Conversely, the functional groups in the tea polyphenol composite chitosan can adsorb with the functional groups in bamboo charcoal fiber and carbon nanotube composite titanium dioxide nanowires to form a three-dimensional network, improving the structural stability of the bamboo charcoal fiber and thus enhancing its mechanical properties and abrasion resistance. Subsequent application in fabrics further improves the mechanical properties and abrasion resistance of the fabric.

[0103] Examples 4-5 describe the preparation methods of carbon nanotube-composite titanium dioxide nanowires without adding carbon nanotubes or sodium alginate. Examples 6-7 show variations in the mass ratio of titanium dioxide nanoparticles, carbon nanotubes, and sodium alginate. Table 1 shows that the radial / weft breaking strength, abrasion resistance, and radial / weft elastic recovery rate of Examples 4-5 are significantly worse than those of Examples 1-3 and Example 6. The corresponding test results of Example 7 are significantly better than those of Examples 4-5, but worse than those of Examples 1-3 and Example 6. This indicates that the sodium alginate molecular chain contains a large number of carboxyl and hydroxyl groups, which easily form a gel network that can coat the carbon nanotube-titanium dioxide nanowire structure, improving the tensile strength and toughness of the carbon nanotube-composite titanium dioxide nanowires. Subsequently, when mixed with bamboo charcoal fiber, it improves the corresponding properties of the bamboo charcoal fiber, thereby improving the overall performance of the fabric.

[0104] Examples 8-9 describe the preparation methods of tea polyphenol composite chitosan without the addition of silica and hydroxypropyl starch. Examples 10-11 show different mass ratios of chitosan, silica, and hydroxypropyl starch. As shown in Table 1, the radial / weft breaking strength, abrasion resistance, and radial / weft elastic recovery rate of Examples 8-9 are significantly worse than those of Examples 1-3 and Example 10. The corresponding test results of Example 11 are significantly better than those of Examples 8-9, but worse than those of Examples 1-3 and Example 10. This indicates that silica has excellent mechanical properties and abrasion resistance, chitosan has excellent film-forming properties, and hydroxypropyl starch has excellent adhesion. The uniform dispersion of SiO2 in the chitosan matrix enhances the tensile strength of the material. The hydroxyl groups of hydroxypropyl starch and the amino groups of chitosan form a hydrogen bond network, enhancing intermolecular forces, reducing crack propagation, and improving the toughness and impact resistance of the material. This will further improve the corresponding properties of bamboo charcoal fiber when applied to it.

[0105] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A method for producing a supercritical lightweight fabric by weaving warp threads and weft threads, characterized by, The supercritical polymer foaming fiber is used as the warp, and the bamboo charcoal fiber is used as the weft, and the preparation method of the bamboo charcoal fiber comprises the following steps: the bamboo charcoal fiber is dispersed in a salicylic acid solution, stirred for 4-6 minutes, washed with water, then dispersed in a sodium carbonate solution, stirred for 3-5 minutes, washed with water, then dispersed in deionized water, and carbon nanotube composite titanium dioxide nanowires and tea polyphenol composite chitosan are added, stirred at a temperature of 60-65 DEG C for 1-2 hours, and dried to obtain the bamboo charcoal fiber; The preparation method of the carbon nanotube composite titanium dioxide nanowire comprises the following steps: Titanium dioxide nanoparticles, carbon nanotubes and sodium dodecylbenzenesulfonate are dispersed in deionized water, ultrasonically treated for 30-35 minutes, filtered, added into a sodium hydroxide solution, and hydrothermally reacted at 120-130 DEG C for 5-6 hours, and after the reaction is completed, centrifugal separation is performed, repeatedly washed with dilute hydrochloric acid and water until neutral, freeze-dried, and then calcined at 500-510 DEG C under a nitrogen atmosphere for 2-3 hours to obtain the carbon nanotube-titanium dioxide nanowire; The carbon nanotube-titanium dioxide nanowire is dispersed in deionized water, polyvinylpyrrolidone and sodium alginate are added, stirred at a temperature of 80-85 DEG C for 1-2 hours, and dried to obtain the carbon nanotube composite titanium dioxide nanowire; The preparation method of the tea polyphenol composite chitosan comprises the following steps: chitosan is dispersed in an acetic acid solution, and tea polyphenol is added, and stirred at room temperature for 25-30 minutes to obtain a mixed solution; Hydroxypropyl starch is dispersed in deionized water, uniformly stirred at a temperature of 50-55 DEG C, and then silicon dioxide and 3-aminopropyltriethoxysilane are added, and the stirring is continued for 1-2 hours, and then dried to obtain a mixture; The mixture is added into the mixed solution, stirred at a temperature of 60-65 DEG C for 2-3 hours, and dried to obtain the tea polyphenol composite chitosan.

2. The method of claim 1, wherein the supercritical light-weight fabric is produced by the steps of: The mass ratio of the bamboo charcoal fiber, the carbon nanotube composite titanium dioxide nanowire and the tea polyphenol composite chitosan is 1:0.6-0.7:0.2-0.

3.

3. The method of claim 1, wherein the supercritical light-weight fabric is produced by the steps of: The mass ratio of the titanium dioxide nanoparticles, the carbon nanotube and the sodium alginate is 1:0.6-0.7:0.2-0.

3.

4. The method of claim 1, wherein the supercritical light-weight fabric is produced by the steps of: The mass ratio of the chitosan, the silicon dioxide and the hydroxypropyl starch is 1:0.4-0.5:0.1-0.

2.

5. The method of claim 1, wherein the supercritical light-weight fabric is produced by the steps of: In the fabric, the warp density is 100-110 roots / inch, and the weft density is 70-80 roots / inch.

6. The method of producing a supercritical lightweight fabric according to claim 1, wherein The method comprises the following steps: twisting one or more supercritical polymer foaming fibers into a yarn, twisting one or more bamboo charcoal fibers into a weft, and weaving the warp and the weft into a supercritical lightweight fabric by using a satin process.

Images