A low-carbon renewable fabric based on modified soybean protein fiber and a preparation method and application thereof

Abstract

The application relates to the technical field of fabric preparation, and discloses a low-carbon renewable fabric based on modified soybean protein fibers and a preparation method thereof.The method is as follows: soybean protein fibers are soaked in a natural antioxidant solution, are frozen at low temperature, and are pulverized into nano-level particles; the particles are mixed with green modifiers and nano magnetic particles to form a system, are subjected to ultrasonic treatment, and are introduced into carbon dioxide gas at a preset temperature and pressure; then, the system is mixed with natural cellulose fibers and biodegradable polymer nanofibers, aerogel powder and polyvinyl alcohol are sprayed on the composite system, and the composite system is dried to obtain a nanofiber membrane; and the nanofiber membrane is subjected to plasma treatment and hot-pressing to obtain the fabric.The low-carbon renewable fabric disclosed by the application has low raw material cost and low production energy consumption, and can be recycled after the end of the product life cycle due to the renewable and degradable characteristics, so that resource waste is reduced.

Description

Technical Field

[0001] This invention relates to the field of fabric preparation technology, and in particular to a low-carbon renewable fabric based on modified soybean protein fiber, its preparation method, and its application. Background Technology

[0002] With rapid industrialization, massive energy consumption has led to a continuous rise in greenhouse gas emissions, exacerbating the trend of global warming. Environmental problems such as air pollution, water pollution, and soil pollution are emerging one after another, seriously threatening human survival and development. At the same time, the over-exploitation and use of non-renewable resources are causing resource reserves to dwindle, making a resource crisis imminent. Against this backdrop, various sectors are actively exploring paths to sustainable development, and the textile industry is no exception.

[0003] Traditional textile production often involves high energy consumption, the use of large amounts of chemicals, and dependence on non-renewable resources. The production process requires significant amounts of electricity, coal, and other energy sources, which not only increases production costs but also leads to substantial greenhouse gas emissions. Furthermore, to achieve various fabric properties such as dyeing and wrinkle resistance, large quantities of chemicals are used. These chemicals release harmful substances during production and use, posing serious risks to the environment and human health.

[0004] Furthermore, traditional fabrics have poor biodegradability and are difficult to decompose naturally after disposal. Large amounts of textile waste accumulate in the environment, placing a heavy burden on ecosystems. This waste not only occupies land resources but also pollutes soil and water sources. Summary of the Invention

[0005] The technical problem to be solved by this invention is that traditional fabrics have poor biodegradability and are difficult to decompose naturally after being discarded.

[0006] Therefore, the first aspect of this invention mentions a method for preparing a low-carbon, renewable fabric based on modified soybean protein fiber, comprising: Step S110: Soak soybean protein fiber in a solution containing natural antioxidants, then remove it and freeze-crush it at low temperature to nanoscale particle size to obtain nanoscale soybean protein fiber particles. Step S210: Mix the nano-sized soybean protein fiber particles with the green modifier and the nano-magnetic particles in a mass ratio of 1:(0.1-0.3):(0.05-0.15) to form a mixed system, and subject the mixed system to ultrasonic treatment. During the ultrasonic treatment, carbon dioxide gas is introduced at a preset temperature and a preset pressure. Step S310: The modified soybean protein fiber particles are mixed with natural cellulose fibers and biodegradable polymer nanofibers to obtain a composite system. The composite system is spread on a plate with micropores at the bottom. A mixture of aerogel powder and polyvinyl alcohol with a mass concentration of 5%-10% is sprayed evenly onto the composite system using a spraying device. After spraying, the composite system is dried at a temperature of 40-60℃ for 3-5 hours to obtain a nanofiber membrane. Step S410: The nanofiber membrane is subjected to plasma treatment, and the multilayer plasma-treated nanofiber membrane is hot-pressed to obtain a low-carbon renewable fabric.

[0007] Further, step S310 includes: grinding the silica aerogel powder to control the particle size to 1-5 micrometers.

[0008] Furthermore, the green modifier is one or more of chitosan, sodium alginate, protease, and lipase.

[0009] Furthermore, during the ultrasonic treatment of the mixed system, the ultrasonic frequency and power are intermittently changed; the initial ultrasonic frequency and initial ultrasonic power are determined, and the mixed system is ultrasonically treated; after a first preset time, the ultrasonic frequency is adjusted to a secondary ultrasonic frequency and power, and the ultrasonic treatment continues; after a second preset time, the ultrasonic frequency is changed back to the initial ultrasonic frequency and initial ultrasonic power, and the process is repeated until the ultrasonic treatment process ends.

[0010] Furthermore, a composite system is obtained by mixing modified soybean protein fiber particles, natural cellulose fibers and biodegradable polymer nanofibers in a mass ratio of 1:(0.2-0.5):(0.1-0.3).

[0011] Furthermore, the natural antioxidant is one of vitamin C, vitamin E, tea polyphenols, anthocyanins, coenzyme Q10, and glutathione; the nanomagnetic particles are one or more of MnZnFe2O4 nanoparticles, NiZnFe2O4 nanoparticles, CoFe nanoparticles, and FeNi nanoparticles; furthermore, the biodegradable polymer nanofibers are one or more of polylactic acid nanofibers, polycaprolactone nanofibers, polyhydroxyalkanoate nanofibers, and chitosan nanofibers; and the natural cellulose fiber is one or more of cotton fiber, hemp fiber, and wood pulp fiber.

[0012] Furthermore, the cryogenic pulverization temperature is -50℃ to -80℃, the nano-particle size is 1-100 nanometers; the preset temperature is 30-60℃, and the preset pressure is 5-15MPa.

[0013] The second aspect of this application mentions a low-carbon renewable fabric based on modified soybean protein fiber, which is prepared using the preparation method of a low-carbon renewable fabric based on modified soybean protein fiber mentioned in the first aspect above.

[0014] The third aspect of this application mentions the application of a low-carbon, renewable fabric based on modified soybean protein fiber in clothing.

[0015] The beneficial effects of this application are as follows: This invention mentions a low-carbon renewable fabric based on modified soybean protein fiber, its preparation method, and its application. The method includes: soaking soybean protein fiber in a solution containing natural antioxidants, then removing it and subjecting it to low-temperature freeze-drying and pulverizing to nanoscale particle size to obtain nanoscale soybean protein fiber particles; mixing the nanoscale soybean protein fiber particles with a green modifier and nanomagnetic particles to form a mixed system, and subjecting the mixed system to ultrasonic treatment, during which carbon dioxide gas is introduced at a preset temperature and pressure; mixing the modified soybean protein fiber particles with natural cellulose fiber and biodegradable polymer nanofibers to obtain a composite system; spreading the composite system flat on a plate with micropores at the bottom, and spraying aerogel powder and polyvinyl alcohol onto the composite system using a spraying device; drying the composite system after spraying to obtain a nanofiber membrane; subjecting the nanofiber membrane to plasma treatment, and hot-pressing the multilayer plasma-treated nanofiber membrane to obtain a low-carbon renewable fabric.

[0016] The low-carbon renewable fabric mentioned in this application utilizes novel modified soybean protein fibers. Modification protects the fiber's molecular structure, reduces oxidative damage, and improves the stability and subsequent reactivity of fiber particles, laying the foundation for multiple recycling and biodegradability. Secondly, advanced materials such as green modifiers and nanomagnetic particles are introduced, combining with soybean protein fibers under specific conditions to form more stable chemical bonds. This enhances fabric performance, and these components can be degraded or reused in the natural environment or under specific treatment conditions. Furthermore, the modified soybean protein fiber particles are mixed with natural cellulose fibers and biodegradable polymer nanofibers. The introduction of aerogel powder and other fibers further enhances the overall thermal insulation of the fabric. The multi-layer nanofiber membrane, hot-pressed composite, forms a dense fabric structure, reducing heat loss and ensuring excellent thermal insulation performance. Finally, plasma treatment and hot-pressing processes further improve the surface properties of the fiber membrane, increasing its surface activity and adhesion. This strengthens the bond between the multi-layer fiber membranes, improving the fabric's durability without affecting its biodegradability, ensuring that the fabric can naturally decompose and return to the natural cycle after disposal. Attached Figure Description

[0017] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to the accompanying drawings.

[0018] Figure 1 This is a flowchart illustrating a method for preparing a low-carbon, renewable fabric based on modified soybean protein fiber, as mentioned in this invention. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific examples, so that those skilled in the art can better understand and implement the present invention, but the examples are not intended to limit the present invention.

[0020] refer to Figure 1 The first aspect of the present invention mentions a method for preparing a low-carbon renewable fabric based on modified soybean protein fiber, comprising: step S110: soaking soybean protein fiber in a solution containing natural antioxidants, removing it and then subjecting the soybean protein fiber to low-temperature freeze-pulverization to nanoscale particle size, thereby obtaining nanoscale soybean protein fiber particles.

[0021] It should be noted that the cryogenic pulverization temperature is -50℃ to -80℃, and the nanoparticle size is 1-100 nanometers. If the nanoparticle size is too large, it will affect the uniformity of subsequent mixing with other substances. Larger particles are difficult to fully contact and react when mixed with green modifiers, resulting in poor modification effects. If the nanoparticle size is too small, it will increase the surface energy of the particles, making them more prone to aggregation. This will affect subsequent processing, requiring more energy and special dispersion methods to prevent aggregation. At the same time, it will also affect the mechanical properties of the fibers, leading to reduced fiber strength and affecting the durability of the final fabric.

[0022] For example, a small planetary ball mill can be used, with the mill speed set at 300-500 rpm and the grinding time controlled at 10-15 hours. After initial grinding in the ball mill, the ground particles are classified using a sieve. Larger particles that have not reached the nanoscale size are returned to the ball mill for secondary grinding. Through multiple classification and grinding cycles, more particles are gradually brought to the target nanoscale size.

[0023] Specifically, soybean protein fiber can be cryogenically pulverized to nanoscale particle size, resulting in nanoscale soybean protein fiber particles. Before cryogenic pulverization, the soybean protein fiber is soaked in a solution containing natural antioxidants for a period of time. These natural antioxidants protect the molecular structure of the soybean protein fiber during pulverization, reducing oxidative damage caused by mechanical pulverization and improving the stability and subsequent reactivity of the fiber particles.

[0024] In this technical solution, the natural antioxidant is one of vitamin C, vitamin E, tea polyphenols, anthocyanins, coenzyme Q10, and glutathione.

[0025] Step S210: Mix the nano-sized soybean protein fiber particles with the green modifier and nano-magnetic particles to form a mixed system, and then subject the mixed system to ultrasonic treatment. During the ultrasonic treatment, carbon dioxide gas is introduced at a preset temperature and pressure.

[0026] Specifically, nano-sized soybean protein fiber particles are mixed with a green modifier and nano-magnetic particles at a mass ratio of 1:(0.1-0.3):(0.05-0.15). The addition of nano-magnetic particles to the mixture allows them to generate a localized micro-magnetic field during ultrasonic treatment, promoting the binding of the green modifier to the soybean protein fiber particles and improving modification efficiency. Simultaneously, in subsequent processing, an external magnetic field can be used to orient the fibers, enhancing the fabric's mechanical properties. Introducing carbon dioxide gas utilizes the catalytic effect of the nano-magnetic particles to promote the reaction between carbon dioxide and the fibers and modifier, forming more stable chemical bonds.

[0027] In this technical solution, the green modifier is one or more of chitosan, sodium alginate, protease, and lipase.

[0028] In this technical solution, the nanomagnetic particles are one or more of MnZnFe2O4 nanoparticles, NiZnFe2O4 nanoparticles, CoFe nanoparticles, and FeNi nanoparticles.

[0029] In this technical solution, the preset temperature is 30-60℃ and the preset pressure is 5-15MPa.

[0030] It should be noted that if the temperature is below 30℃, carbon dioxide is unlikely to reach a supercritical state, and its solubility in the system is low, affecting its effect on the mixture. If the temperature is above 60℃, it will adversely affect the properties of soybean protein fiber, green modifier, and nanomagnetic particles, leading to protein denaturation and modifier decomposition.

[0031] It should be noted that if the pressure is below 5 MPa, carbon dioxide will also have difficulty reaching a good supercritical state, thus weakening its penetration and effect on the mixed system. Furthermore, a pressure below 5 MPa will result in insufficient modification of the fibers.

[0032] In this technical solution, the ultrasonic frequency and power can be intermittently changed during the ultrasonic treatment process. Different ultrasonic frequencies and powers can produce different cavitation effects and mechanical actions, which helps to break the local equilibrium of the reaction system, making the reaction more complete and improving the uniformity of the modification effect.

[0033] Specifically, the initial ultrasonic frequency and power are first determined, and the mixture is ultrasonically treated. After a first preset time, the ultrasonic frequency and power are adjusted to a secondary ultrasonic frequency and power, and ultrasonic treatment continues. After a second preset time, the ultrasonic frequency and power are returned to the initial ultrasonic frequency and power, and this process is repeated until the ultrasonic treatment is completed. This application improves the homogeneity of the mixture through intermittent ultrasonic treatment, as different ultrasonic frequencies and powers can produce different cavitation effects and mechanical vibration effects in the mixture. Intermittently changing the frequency and power allows the components in the mixture to move and mix under different forces, avoiding localized non-uniformity that occurs under a single frequency and power, thereby improving the overall uniformity of the treatment. In addition, by changing the frequency and power, the nanomagnetic particles, soybean protein fiber particles, and green modifier can interact at different energy levels, promoting better dispersion and mixing. This helps improve the performance stability and consistency of the final product.

[0034] Step S310: The modified soybean protein fiber particles are mixed with natural cellulose fibers and biodegradable polymer nanofibers to obtain a composite system. The composite system is spread on a plate with micropores at the bottom. A spraying device is used to uniformly spray a mixture of aerogel powder and polyvinyl alcohol with a mass concentration of 5%-10% onto the composite system. After spraying, the composite system is dried at a temperature of 40-60℃ for 3-5 hours to obtain a nanofiber membrane.

[0035] In this technical solution, the mass of aerogel powder is controlled to be 5%-20% of the total mass of the fiber mixture. Within this range, the aerogel can effectively fill the internal pores of the fibers and adhere to the fiber surface, thereby improving the thermal insulation performance of the fabric without significantly increasing its weight and cost. When the amount of aerogel powder is too small, it cannot fully fill the fiber pores, making it difficult to form an effective thermal insulation barrier; while when the amount is too large, it will result in an overly thick fabric, affecting its comfort and processing performance.

[0036] Specifically, prepare silica aerogel. Grind the aerogel to refine its particle size to 1-5 micrometers. Spread the modified soybean protein fiber particles, natural cellulose fiber, and biodegradable polymer nanocomposite system in a specially designed container with a microporous plate at the bottom. Use a spraying device to uniformly spray the aerogel powder with a 5%-10% polyvinyl alcohol (PVA) solution onto the composite system. During spraying, activate the suction device on the microporous plate at the bottom of the container to create a stable airflow, allowing the aerogel powder to better fill the internal pores of the fibers and adhere to the fiber surface. After spraying, dry the composite system at 40-60℃ for 3-5 hours to cure the PVA and fix the bonding state between the aerogel and the fibers.

[0037] In one feasible implementation, a sand mill is used for wet grinding. The sand mill uses an agitator to drive the grinding media to rotate at high speed, grinding and dispersing the material. The grinding media can be glass beads or ceramic beads.

[0038] It should be noted that adding a small amount of biodegradable polymer nanofibers can increase the strength and toughness of the fiber membrane, while improving the biodegradability of the fabric, thus meeting the requirements of low-carbon and environmental protection.

[0039] It should be noted that the mass ratio of modified soybean protein fiber particles to natural cellulose fiber and biodegradable polymer nanofiber should be controlled at 1:(0.2-0.5):(0.1-0.3). If the proportion of natural cellulose fiber is too high, the fabric will be too rough and will lose the softness of soybean protein fiber.

[0040] In this technical solution, the natural cellulose fiber is one or more of cotton fiber, hemp fiber, and wood pulp fiber.

[0041] In this technical solution, the biodegradable polymer nanofibers are one or more of polylactic acid nanofibers, polycaprolactone nanofibers, polyhydroxyalkanoate nanofibers, and chitosan nanofibers.

[0042] Step S410: The nanofiber membrane is subjected to plasma treatment, and the multilayer plasma-treated nanofiber membrane is hot-pressed to obtain a low-carbon renewable fabric.

[0043] Before hot-pressing lamination, the nanofiber membrane is subjected to plasma treatment. Specifically, the nanofiber membrane is subjected to plasma treatment using a radio frequency plasma generator with a treatment power of 50-100W and a treatment time of 10-20 minutes. Plasma treatment can improve the surface properties of the fiber membrane, increase its surface activity and adhesion, improve the effect of hot-pressing lamination, and make the bonding between multilayer fiber membranes more robust.

[0044] The modified soybean protein fiber low-carbon renewable fabric mentioned in this application has several advantages. First, soybean protein fiber itself is naturally renewable, widely available, and environmentally friendly. Modification further enhances its performance, making it more suitable for recycling. During the modification process, natural antioxidants are used to treat the soybean protein fiber, which not only protects the fiber's molecular structure, reduces oxidative damage, and improves the stability and subsequent reactivity of the fiber particles, but also ensures multiple recycling cycles. Second, green modifiers and nano-magnetic particles are introduced and, under specific temperature, pressure, and ultrasonic treatment conditions, combine with the soybean protein fiber to form more stable chemical bonds, enhancing the fabric's performance. These components can be degraded or reused in the natural environment or under specific treatment conditions, laying the foundation for the fabric's recyclability. Third, mixing the modified soybean protein fiber particles with natural cellulose fibers and biodegradable polymer nanofibers, and introducing aerogel powder to combine with other fibers, further enhances the overall thermal insulation capacity of the fabric. The multi-layer nanofiber membrane, hot-pressed composite, forms a dense fabric structure that reduces heat loss through conduction, collectively ensuring excellent thermal insulation performance. Finally, the surface properties of the fiber membrane are further improved through plasma treatment and hot-pressing composite processes, increasing its surface activity and adhesion, making the bond between the multilayer fiber membranes stronger, improving the durability of the fabric, and providing strong support for recycling.

[0045] The second aspect of this application mentions a low-carbon, renewable fabric based on modified soybean protein fiber. It is prepared using the same method described in the first aspect. Environmentally, the soybean protein fiber is treated with natural antioxidants, combined with green modifiers and nano-magnetic particles. Carbon dioxide gas is introduced under environmentally preset temperature and pressure conditions. Natural cellulose fibers and biodegradable polymer nanofibers are added, reducing the use of chemical substances, minimizing adverse environmental impact, enhancing biodegradability, and preventing excessive pollution. Furthermore, it exhibits good economic performance, with low raw material costs and low production energy consumption. Its renewable and biodegradable characteristics allow for recycling at the end of its product lifecycle, reducing resource waste. Simultaneously, the fabric offers excellent comfort; the combination of soybean protein fiber and natural cellulose fiber is skin-friendly and comfortable, suitable for close-fitting wear, and possesses good breathability and moisture absorption. In addition, it has certain antibacterial properties; the natural antioxidants and green modifiers inhibit bacterial growth and reduce odor generation, providing users with a healthy wearing experience.

[0046] To better understand the technical solution, the technical solution of the present invention will be described in detail below by way of embodiments.

[0047] Example 1 BASF's vitamin C product was selected as the natural antioxidant, chitosan produced by Qingdao Mingyue Blue Ocean Biotechnology Co., Ltd. was selected as the green modifier, MnZnFe2O4 nanoparticles produced by Nanjing Xianfeng Nanomaterials Technology Co., Ltd. were selected as the nanomagnetic particles, cotton fiber produced in Xinjiang was selected as the natural cellulose fiber, and polylactic acid nanofiber produced by Zhejiang Hisun Biomaterials Co., Ltd. was selected as the biodegradable polymer nanofiber.

[0048] Soy protein fiber was soaked in a 1g / L vitamin C solution, rinsed, and centrifuged to remove moisture content of 10%-20%. Then, it was cryogenically pulverized at -50℃ to a nano-particle size of 50 nanometers.

[0049] Nanoscale soybean protein fiber particles were mixed with chitosan and MnZnFe2O4 nanoparticles at a mass ratio of 1:0.1:0.15. The mixture was then subjected to ultrasonic treatment with an initial ultrasonic frequency of 40 kHz and an initial ultrasonic power of 800 W. After a first preset time of 15 minutes, the ultrasonic frequency was adjusted to 35 kHz and the power to 700 W for another 15 minutes. The initial ultrasonic frequency and power were then returned to the original settings, and this cycle was repeated. The ultrasonic treatment was carried out at a preset temperature of 45℃ and a preset pressure of 10 MPa. Carbon dioxide gas was introduced at a mass ratio of soybean protein fiber to carbon dioxide of 1:0.1.

[0050] Silica aerogel is dispersed in water to form a slurry with a concentration of 10%-20%. The slurry is then added to a sand mill, with grinding media added at a volume ratio of slurry to grinding media of 1:2-1:3. The sand mill is set to a stirring speed of 1500-3000 rpm, and the grinding time is 5-10 hours. During the grinding process, the slurry is continuously passed through the sand mill for repeated grinding via a circulation system. After grinding, the grinding media and aerogel slurry are separated by centrifugation, and then the slurry is dried to obtain aerogel powder with a particle size of 1-5 micrometers.

[0051] A composite system was prepared by mixing modified soybean protein fiber particles, cotton fiber, and polylactic acid nanofibers in a mass ratio of 1:0.2:0.3. The composite system was then spread on a plate with micropores at the bottom. A mixture of aerogel powder (1 / 20 of the mass of the composite system) and polyvinyl alcohol (5% by mass) was uniformly sprayed onto the composite system using a spraying device. After spraying, the composite system was dried at a temperature of 40-60℃ for 3-5 hours to obtain a nanofiber membrane.

[0052] The nanofiber membrane was processed using a radio frequency plasma generator with a processing power of 50W and a processing time of 20 minutes, and then hot-pressed to form a fabric.

[0053] The antioxidant properties of vitamin C protect the molecular structure of soybean protein fiber. Chitosan and polylactic acid nanofibers are themselves highly biodegradable. In addition, the nanoscale fiber particle structure increases the contact area with microorganisms, allowing the fabric to be decomposed by microorganisms more quickly.

[0054] Example 2 The selected materials include: natural antioxidants (tea polyphenols) produced by Zhejiang Xinyinxiang Bioengineering Co., Ltd.; a mixture of sodium alginate produced by Qingdao Mingyue Algae Group Co., Ltd. and protease produced by Zhejiang Xinyinxiang Bioengineering Co., Ltd.; and NiZnFe2O4 nanoparticles produced by Nanjing Xianfeng Nanomaterials Technology Co., Ltd. The natural cellulose fiber is hemp fiber produced by Jiangsu Bauhinia Textile Technology Co., Ltd., and the biodegradable polymer nanofiber is polycaprolactone nanofiber produced by Zhuhai Maidefa Biomaterials Co., Ltd.

[0055] Soy protein fiber is soaked in a solution containing tea polyphenols, then rinsed and centrifuged to remove moisture content of 10%-20%. The fiber is then cryogenically pulverized at -65℃ to a nanoscale particle size of 80 nanometers.

[0056] Nanoscale soybean protein fiber particles were mixed with a mixture of sodium alginate and protease, and NiZnFe2O4 nanoparticles at a mass ratio of 1:0.2:0.10. The mixture was then subjected to ultrasonic treatment. The initial ultrasonic frequency was 45 kHz, and the initial ultrasonic power was 900 W. After a first preset time of 20 minutes, the ultrasonic frequency was adjusted to a secondary ultrasonic frequency of 40 kHz, and the power was adjusted to a secondary ultrasonic power of 800 W. This was continued for 20 minutes, after which the initial ultrasonic frequency and power were returned. This cycle was repeated. The ultrasonic treatment was carried out at a preset temperature of 50℃ and a preset pressure of 12 MPa. Carbon dioxide gas was introduced at a mass ratio of soybean protein fiber to carbon dioxide of 1:0.1.

[0057] Silica aerogel is dispersed in water to form a slurry with a concentration of 10%-20%. The slurry is then added to a sand mill, with grinding media added at a volume ratio of slurry to grinding media of 1:2-1:3. The sand mill is set to a stirring speed of 1500-3000 rpm, and the grinding time is 5-10 hours. During the grinding process, the slurry is continuously passed through the sand mill for repeated grinding via a circulation system. After grinding, the grinding media and aerogel slurry are separated by centrifugation, and then the slurry is dried to obtain aerogel powder with a particle size of 1-5 micrometers.

[0058] Modified soybean protein fiber particles, hemp fiber, and polycaprolactone nanofibers in a mass ratio of 1:0.4:0.2 were mixed to obtain a composite system. The composite system was spread on a plate with micropores at the bottom. A mixture of aerogel powder (1 / 10 of the mass of the composite system) and polyvinyl alcohol (10% by mass) was uniformly sprayed onto the composite system using a spraying device. After spraying, the composite system was dried at a temperature of 40-60℃ for 3-5 hours to obtain a nanofiber membrane.

[0059] The nanofiber membrane was processed using a radio frequency plasma generator with a processing power of 75W and a processing time of 15 minutes, and then hot-pressed to form a fabric.

[0060] The antioxidant properties of tea polyphenols protect the molecular structure of soybean protein fibers. The modification effects of sodium alginate and protease, combined with the good biodegradability of hemp fibers and polycaprolactone nanofibers, and the increased contact area with microorganisms due to the nanoscale fiber particle structure, allow the fabric to be decomposed by microorganisms more quickly in the natural environment. Simultaneously, the nanomagnetic particles can further promote microbial decomposition to some extent.

[0061] Example 3 The selected natural antioxidants are anthocyanins produced by Zhejiang Xinyinxiang Bioengineering Co., Ltd., the green modifiers are lipases produced by Qingdao Mingyue Algae Group Co., Ltd., the nanomagnetic particles are CoFe nanoparticles produced by Nanjing Xianfeng Nanomaterials Technology Co., Ltd., the natural cellulose fibers are wood pulp fibers produced by Jiangsu Bauhinia Textile Technology Co., Ltd., and the biodegradable polymer nanofibers are chitosan nanofibers produced by Qingdao Mingyue Algae Group Co., Ltd.

[0062] Soybean protein fiber is soaked in a solution containing anthocyanins, then rinsed and centrifuged to remove moisture content of 10%-20%. The fiber is then cryogenically pulverized at -80℃ to a nanoscale particle size of 30 nanometers.

[0063] Nanoscale soybean protein fiber particles were mixed with lipase and CoFe nanoparticles at a mass ratio of 1:0.3:0.05. The mixture was then subjected to ultrasonic treatment with an initial ultrasonic frequency of 38 kHz and an initial ultrasonic power of 750 W for a first preset time of 12 minutes. The ultrasonic frequency was then adjusted to a secondary ultrasonic frequency of 35 kHz and the power to a secondary ultrasonic power of 700 W for another 12 minutes, after which the initial ultrasonic frequency and power were returned to normal. This cycle was repeated. The ultrasonic treatment was carried out at a preset temperature of 40℃ and a preset pressure of 8 MPa. Carbon dioxide gas was introduced at a mass ratio of soybean protein fiber to carbon dioxide of 1:0.1.

[0064] Silica aerogel is dispersed in water to form a slurry with a concentration of 10%-20%. The slurry is then added to a sand mill, with grinding media added at a volume ratio of slurry to grinding media of 1:2-1:3. The sand mill is set to a stirring speed of 1500-3000 rpm, and the grinding time is 5-10 hours. During the grinding process, the slurry is continuously passed through the sand mill for repeated grinding via a circulation system. After grinding, the grinding media and aerogel slurry are separated by centrifugation, and then the slurry is dried to obtain aerogel powder with a particle size of 1-5 micrometers.

[0065] Modified soybean protein fiber particles, wood pulp fiber, and chitosan nanofibers in a mass ratio of 1:0.5:0.1 were mixed to obtain a composite system. The composite system was spread on a plate with micropores at the bottom. A mixture of aerogel powder (1 / 5 of the mass of the composite system) and polyvinyl alcohol (15% mass concentration) was uniformly sprayed onto the composite system using a spraying device. After spraying, the composite system was dried at a temperature of 40-60℃ for 3-5 hours to obtain a nanofiber membrane.

[0066] The nanofiber membrane is heat-pressed and composited using a radio frequency plasma generator with a processing power of 100W for 10 minutes to form a fabric.

[0067] Thermal insulation performance test experiment: 1. Experimental Equipment: Flat-plate heat flow meter: used to measure heat flow. Environmental test chamber: can precisely control environmental conditions such as temperature and humidity; temperature control accuracy is ±0.5℃, and relative humidity control accuracy is ±3%. Sample frame: used to fix the sample and ensure that the sample is flat during the test. Data acquisition system: connected to the flat-plate heat flow meter to record heat flow data; 2. Sample Preparation: Cut the fabrics prepared in Examples 1, 2, and 3 into circles with a diameter of 300 mm, ensuring the samples are free of defects such as breakage and wrinkles. Prepare 3 samples for each example. 3. Experimental Procedure and Environmental Conditions: Set the temperature of the environmental test chamber to 20℃ and the relative humidity to 65%. Begin testing after the environment has stabilized. Mount the sample flat on the sample frame and place it in the measurement area of ​​the flat-plate heat flow meter, ensuring good contact between the sample and the meter. Measure the heat flow: Turn on the data acquisition system and record the change in heat flow of the sample over a certain period of time. The measurement time should be no less than 30 minutes until the heat flow data stabilizes. Calculate the insulation performance index: Calculate the insulation rate based on the heat flow data. 4. Result determination: The average value and standard deviation of the test results of the three samples of fabrics prepared in Examples 1, 2 and 3 were calculated, as shown in Table 1 below.

[0068]

[0069] As shown in Table 1, the fabrics prepared in Examples 1, 2, and 3 are all greater than the national standard requirement of 30%, and the standard deviation is within the reasonable range of 3%.

[0070] Degradability test experiment using soil burial method: 1. Experimental Materials and Equipment: Soil: Select fertile, unpolluted garden soil or farmland soil, sieve to remove impurities and larger particles, and adjust soil moisture to 60%-70% of field capacity. Culture Containers: Such as plastic flower pots or glass petri dishes, approximately 150-200 mm in diameter, with ventilation holes. Balance: Accuracy 0.01 g, used for weighing sample mass. Constant Temperature Incubator: Temperature controlled at 25℃±2℃; 2. Sample preparation: The fabrics prepared in Examples 1, 2 and 3 were cut into small pieces with a size of approximately 20mm × 20mm. The initial mass of each small piece was accurately weighed. At least 5 samples were prepared for each example. 3. Experimental Procedure: Soil Burial: Lay a layer of experimental soil approximately 50 mm thick at the bottom of the culture container, bury the sample evenly in the soil, and then cover it with another layer of soil approximately 20 mm thick. Culture Observation: Place the culture container in a constant temperature incubator, regularly observe the soil moisture, and replenish water as needed to maintain stable soil moisture. Mass Determination: Remove the sample at 7, 14, 21, and 28 days, gently rinse off the surface soil with clean water, allow it to air dry naturally in a cool place, weigh the sample using a balance, and calculate the degradation rate. 4. Result determination: The average value and standard deviation of the test results of the three samples of fabrics prepared in Examples 1, 2 and 3 were calculated, as shown in Table 2 below.

[0071]

[0072] As shown in Table 2, the degradation rate of the fabrics prepared in Examples 1, 2, and 3 reached 11%-18%.

[0073] Obviously, the above are merely examples for clear illustration and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

[0074] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0075] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0076] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0077] In this specification, the terms "a," "some," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that example or example that is included in at least one or more examples of the invention. The illustrative expressions of the above terms in this specification do not necessarily refer to the same or similar examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more examples or examples. Moreover, those skilled in the art can combine and integrate the different examples and features described in this specification without contradiction.

[0078] Although the present invention has been shown and described above, it is to be understood that the above is exemplary and should not be construed as limiting the present invention. Those skilled in the art can make alterations, modifications, substitutions and variations to the above within the scope of the present invention.

Claims

1. A method for preparing a low-carbon, renewable fabric based on modified soybean protein fiber, characterized in that: include: Step S110: Soak soybean protein fiber in a solution containing anthocyanins, take it out and rinse it, centrifuge and dehydrate the fiber until the water content is 10%-20%, and then freeze-crush it at a temperature of -80℃ to a nano-particle size of 30 nanometers. Step S210: Mix nano-sized soybean protein fiber particles with lipase and CoFe nanoparticles at a mass ratio of 1:0.3:0.05; subject the mixture to ultrasonic treatment with an initial ultrasonic frequency of 38kHz and an initial ultrasonic power of 750W. After a first preset time of 12 minutes, adjust the ultrasonic frequency to a secondary ultrasonic frequency of 35kHz and the power to a secondary ultrasonic power of 700W for 12 minutes, then return to the initial ultrasonic frequency and power. Repeat this cycle. The ultrasonic treatment is carried out at a preset temperature of 40℃ and a preset pressure of 8MPa. Introduce carbon dioxide gas at a mass ratio of soybean protein fiber to carbon dioxide of 1:0.

1. Step S310: Disperse silica aerogel in water to form a slurry with a concentration of 10%-20%; add the slurry to a sand mill and add grinding media at a volume ratio of slurry to grinding media of 1:2-1:3; set the stirring speed of the sand mill to 1500-3000 rpm and the grinding time to 5-10 hours. During the grinding process, the slurry is repeatedly ground by passing it through the sand mill through a circulation system; After grinding, the grinding media and aerogel slurry are separated by centrifugation, and then the slurry is dried to obtain aerogel powder with a particle size of 1-5 micrometers. Modified soybean protein fiber particles, wood pulp fiber, and chitosan nanofibers in a mass ratio of 1:0.5:0.1 were mixed to obtain a composite system. The composite system was spread on a plate with micropores at the bottom. A mixture of aerogel powder (1 / 5 of the mass of the composite system) and polyvinyl alcohol (15% mass concentration) was uniformly sprayed onto the composite system using a spraying device. After spraying, the composite system was dried at a temperature of 40-60℃ for 3-5 hours to obtain a nanofiber membrane. Step S410: The nanofiber membrane is subjected to plasma treatment, and the multilayer plasma-treated nanofiber membrane is hot-pressed to obtain a low-carbon renewable fabric.

2. A low-carbon renewable fabric based on modified soybean protein fiber, prepared by the method described in claim 1.

3. The application of a low-carbon renewable fabric based on modified soybean protein fiber as described in claim 2 in clothing.

Images