Antibacterial high-elastic vegetable protein composite combed cotton yarn and preparation method thereof
By constructing a three-dimensional cross-linked network of plant protein-based elastomers and an interfacial compatibilizer, combined with the core-shell structure of antibacterial functional materials, the problems of weak interfacial bonding and insufficient functional durability when plant proteins are combined with cotton fibers are solved, resulting in highly elastic, long-lasting antibacterial, and high-strength antibacterial high-elastic combed cotton yarn.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ANHUI YAOSHENG NEW MATERIAL TECHNOLOGY CO LTD
- Filing Date
- 2026-04-07
- Publication Date
- 2026-07-03
AI Technical Summary
Existing technologies struggle to effectively combine plant proteins with cotton fibers to achieve high elasticity, durability, and antibacterial properties. Furthermore, existing methods suffer from weak interfacial bonding and insufficient functional durability.
By constructing a three-dimensional cross-linked network of plant protein-based elastomers and combining it with the core-shell structure of interfacial compatibilizers and antibacterial functional materials, a highly efficient composite of plant proteins and cotton fibers is achieved. Antibacterial high-elastic combed cotton yarn is then prepared using compact Sirospinning technology.
It achieves high elastic recovery rate, long-lasting antibacterial effect and high strength. The yarn is significantly better than conventional methods in terms of washability and structural stability, and has the prospect of industrialization and promotion.
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Abstract
Description
Technical Field
[0001] This invention belongs to the field of functional yarn technology, specifically relating to an antibacterial, high-elasticity plant protein composite combed cotton yarn and its preparation method. Background Technology
[0002] With increasing consumer awareness of health and the growing trend towards functional and eco-friendly textiles, the market demand for high-end yarns that combine eco-friendly properties, long-lasting antibacterial properties, and comfortable elasticity is growing. Cotton yarn is widely used due to its natural, breathable, and comfortable advantages, but it lacks antibacterial properties and has poor elasticity, making it difficult to meet the needs of high-end functional textiles.
[0003] Currently, the main technical means to impart antibacterial properties to cotton yarn include post-treatment antibacterial treatment and blended spinning. Post-treatment antibacterial treatment usually involves applying antibacterial agents such as quaternary ammonium salts, silver-based agents, and guanidines to the yarn surface through methods such as padding. This method is simple, but it has problems such as easy migration of antibacterial components, poor wash resistance, stiffening of the hand feel, potential skin allergies, and poor environmental friendliness. Blended spinning involves blending functional fibers with cotton fibers, which can improve antibacterial properties or elasticity to a certain extent. However, the performance differences between different fibers may lead to unstable yarn structure, affecting strength and uniformity.
[0004] Plant proteins are widely available, biodegradable, and biocompatible, and their molecular structure contains numerous active groups, making them easy to functionalize. Applying plant proteins to textile yarns holds promise for preserving their natural properties while endowing them with new functions. However, plant protein-based materials typically exhibit poor mechanical properties, particularly elasticity and durability. Effectively combining them with cotton fibers to simultaneously achieve high elasticity and high strength remains a significant technical challenge. Current techniques, such as directly blending plant protein powder or simply modified protein fibers with cotton, often suffer from weak interfacial bonding, easy loss of protein components, and insufficient functional durability, resulting in final yarn products that fail to meet the requirements of high-end applications in terms of wash resistance, elastic recovery rate, and strength.
[0005] Therefore, developing a composite combed cotton yarn based on natural materials that can simultaneously achieve efficient and long-lasting antibacterial properties, excellent elastic recovery, and high strength and durability has significant technological value and broad market prospects. Summary of the Invention
[0006] The purpose of this invention is to provide an antibacterial, high-elasticity plant protein composite combed cotton yarn and its preparation method, so as to solve the problems in the background art.
[0007] The objective of this invention can be achieved through the following technical solutions: An antibacterial, high-elasticity plant protein composite combed cotton yarn comprises the following raw materials in parts by weight: Combed cotton fiber 70-85 parts, plant protein-based elastomer 10-20 parts, antibacterial functional material 3-8 parts, interface compatibilizer 1-3 parts, antioxidant 0.5-1.5 parts; The plant protein-based elastomer is the core of this invention for achieving high elasticity, and it is prepared by the following steps: A1. Add urea and ethylene glycol to a borate buffer solution with pH=9.5 and stir to dissolve. Then add soy protein isolate and silk fibroin and stir to mix for 2 hours in a water bath at 60-75℃. Then cool down to 40℃ and add crosslinking agent and bio-based plasticizer. Perform crosslinking and plasticizing reaction for 4 hours under stirring to obtain spinning solution. A2. The spinning solution is passed through a spinneret with a 0.1 mm orifice and pressed into a 95% ethanol coagulation bath to form nascent protein fiber filaments. After being drawn by guide rollers at a draw ratio of 1.5, the filaments are dried with hot air at 60°C and then cut into short fibers with a length of 5 mm to obtain a plant protein-based elastomer. The plant protein-based elastomer of this invention is formed by mixing soybean protein isolate and silk fibroin, followed by dissolution, cross-linking, and plasticization reactions. By constructing a three-dimensional cross-linked network, the originally brittle plant protein is transformed into a bio-based material with similar resilience to synthetic elastomers, while exposing a large number of active groups for easy subsequent bonding.
[0008] Furthermore, the ratio of urea, ethylene glycol, borate buffer, soy protein isolate, silk fibroin, crosslinking agent, and bio-based plasticizer is 40g:25g:500mL:30-50g:10g:2g:3-3.5g.
[0009] Furthermore, the crosslinking agent is genipin, and the bio-based plasticizer is triethyl citrate.
[0010] Furthermore, the combed cotton fiber has a fiber length of not less than 29 mm, a micronaire value of 3.7-4.2, and a short fiber content of less than 8% to ensure the basic quality of the yarn.
[0011] Furthermore, the antibacterial functional material is a core-shell structured nanocapsule, with a core layer of porous silica microspheres loaded with natural antibacterial complexes and a shell layer of pH-responsive biopolymer wall material, prepared through the following steps: B1. Add tea polyphenols, cinnamaldehyde, and chitosan quaternary ammonium salt to anhydrous ethanol and stir to dissolve, to obtain a homogeneous and transparent antibacterial complex solution; then impregnate porous silica microspheres in the above antibacterial complex solution, ultrasonically assisted impregnation for 4 h, and then vacuum dry at 40 °C for 12 h to obtain drug-loaded microspheres. B2. Drug-loaded microspheres were dispersed in a gelatin aqueous solution. While stirring, sodium alginate and calcium chloride aqueous solutions were added dropwise over a period of 1 hour. After the addition was complete, stirring was continued for another hour to achieve ionic cross-linking and coating. The reaction product was filtered, washed three times with deionized water, and then freeze-dried to obtain a white powdery antibacterial functional material. The preparation of this antibacterial functional material achieved intelligent sustained-release of the antibacterial components: accelerated release in weakly acidic human sweat or infectious microenvironments, while remaining stable under neutral washing conditions, thus overcoming the problem of antibacterial properties not being washable.
[0012] Furthermore, the ratio of the porous silica microspheres to the antibacterial complex solution is 1g:10mL; the pore size of the porous silica microspheres is 10nm; the ratio of tea polyphenols, cinnamaldehyde, and chitosan quaternary ammonium salt in the antibacterial complex solution is 2:1:1; the amount of anhydrous ethanol used is sufficient to completely dissolve the antibacterial complex, and using excessive amounts will increase the subsequent drying time and cost.
[0013] Furthermore, the ratio of the drug-loaded microspheres, gelatin aqueous solution, sodium alginate aqueous solution, and calcium chloride aqueous solution is 5g:200mL:200mL:50mL; the concentration of the gelatin aqueous solution is 3wt%; the concentration of the sodium alginate aqueous solution is 2wt%; and the concentration of the calcium chloride aqueous solution is 5wt%.
[0014] Furthermore, the interface compatibilizer is a compound of silane coupling agent KH-560 and polyethyleneimine in a mass ratio of 1:0.5-1, wherein the molecular weight of polyethyleneimine is 10,000. This compound can simultaneously form strong chemical bonds or hydrogen bonds with the hydroxyl groups of cotton fibers, the amino / carboxyl groups of plant proteins, and the surface of silica, acting as a molecular bridge and fundamentally solving the problems of interfacial compatibility and stress transfer between multiphase heterogeneous materials.
[0015] Furthermore, the antioxidant is a composition of equal mass of vitamin E and rosemary extract, used to prevent oxidative degradation of plant proteins and natural antibacterial components during processing and use.
[0016] A method for preparing antibacterial, high-elasticity plant protein composite combed cotton yarn includes the following steps: S1. Mix combed cotton fibers with plant protein-based elastomer, then spray with an interface compatibilizer, pre-treat in an oven at 45-55℃ for 20-40 minutes to activate the interface, then add antibacterial functional materials and antioxidants, loosen and mix for 20 minutes to obtain the pre-treated mixture. S2. After the pretreated mixture undergoes cleaning, carding, drawing, and roving processes, it is spun into yarn on a spinning machine using compact Siro spinning, with the twist coefficient controlled at 380-420 to obtain the best strength-elasticity balance. The yarn is then wound into a bobbin to obtain antibacterial, high-elasticity plant protein composite combed cotton yarn.
[0017] Beneficial effects: This invention successfully constructs a plant protein-based elastomer with a three-dimensional elastic network through cross-linking and plasticizing of soybean protein and silk fibroin. It fundamentally possesses high resilience, with an initial elastic recovery rate of 95.0% or higher, and still maintains 91.5% or higher after 1000 fatigue tests. This is significantly better than conventional polyester / cotton blended yarn and spandex replacement systems, proving that plant protein-based elastomers are not only the source of elasticity, but also, due to their bio-based surface characteristics, can form a strong bond with subsequent interface compatibilizers, thereby achieving efficient transfer and long-term maintenance of elasticity, solving the problem of insufficient elasticity and durability of bio-based materials. The antibacterial functional material of this invention adopts a unique core-shell structure with porous silica core loading and pH-responsive gelatin / sodium alginate shell coating, realizing intelligent control and long-term sustained release of antibacterial components. After 200 harsh washes, the antibacterial rate still exceeds 99.3%. More importantly, this antibacterial functional material and the plant protein-based elastomer and cotton fiber system produce excellent synergistic effects through an interface compatibilizer: the compatibilizer acts as a molecular bridge, anchoring one end to the cotton fiber and elastomer, and the other end to the shell layer through strong electrostatic interaction, thereby firmly locking the antibacterial components inside the yarn, while improving the overall density and stability of the structure, achieving a triple effect of long-lasting antibacterial effect, high strength and high elasticity. The preparation method of this invention is based on existing mature equipment with minor adjustments. First, an interface compatibility pretreatment is performed by spraying an interface compatibility agent onto the mixed combed cotton fibers and plant protein-based elastomer. Then, antibacterial functional materials and antioxidants are added for opening and mixing. The key interface pretreatment step is simple to operate, but it fundamentally ensures the binding force between the multiphase heterogeneous components and is the core of the process for achieving performance. Finally, compact Siro spinning technology is used to further enhance the compactness of the yarn structure, solidify and amplify the advantages of each component on the final yarn. The overall process is stable and controllable, and has excellent prospects for industrialization and promotion. Detailed Implementation
[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example 1
[0019] This embodiment provides a plant protein-based elastomer, which is prepared by the following steps: A1. Add 40g of urea and 25g of ethylene glycol to 500mL of borate buffer solution with pH=9.5, stir to dissolve, then add 30g of soy protein isolate and 10g of silk fibroin and stir to mix for 2h in a 60℃ water bath. Then cool to 40℃ and add 2g of genipin and 3g of triethyl citrate. Perform cross-linking and plasticizing reaction for 4h under stirring to obtain spinning solution. A2. The spinning solution is pressed into a 95% ethanol coagulation bath through a spinneret with a diameter of 0.1 mm to form nascent protein fiber filaments. After being drawn by guide rollers at a draw ratio of 1.5, the filaments are dried with hot air at 60°C and then cut into short fibers with a length of 5 mm to obtain plant protein-based elastomer. Example 2
[0020] This embodiment provides a plant protein-based elastomer, which is prepared by the following steps: A1. Add 40g of urea and 25g of ethylene glycol to 500mL of borate buffer solution with pH=9.5, stir to dissolve, then add 40g of soy protein isolate and 10g of silk fibroin and stir to mix for 2h in a 70℃ water bath. Then cool to 40℃ and add 2g of genipin and 3.2g of triethyl citrate. Perform cross-linking and plasticizing reaction for 4h under stirring to obtain spinning solution. A2. The spinning solution is pressed into a 95% ethanol coagulation bath through a spinneret with a diameter of 0.1 mm to form nascent protein fiber filaments. After being drawn by guide rollers at a draw ratio of 1.5, the filaments are dried with hot air at 60°C and then cut into short fibers with a length of 5 mm to obtain plant protein-based elastomer. Example 3
[0021] This embodiment provides a plant protein-based elastomer, which is prepared by the following steps: A1. Add 40g of urea and 25g of ethylene glycol to 500mL of borate buffer solution with pH=9.5, stir to dissolve, then add 50g of soy protein isolate and 10g of silk fibroin and stir to mix for 2h in a 75℃ water bath. Then cool to 40℃ and add 2g of genipin and 3.5g of triethyl citrate. Perform cross-linking and plasticizing reaction for 4h under stirring to obtain spinning solution. A2. The spinning solution is pressed into a 95% ethanol coagulation bath through a spinneret with a diameter of 0.1 mm to form nascent protein fiber filaments. After being drawn by guide rollers at a draw ratio of 1.5, the filaments are dried with hot air at 60°C and then cut into short fibers with a length of 5 mm to obtain plant protein-based elastomer. Example 4
[0022] This embodiment provides an antibacterial functional material, which is prepared through the following steps: B1. Add 6g of tea polyphenols, 3g of cinnamaldehyde, and 3g of chitosan quaternary ammonium salt to 100mL of anhydrous ethanol and stir to dissolve to obtain an antibacterial complex solution; then immerse 10g of porous silica microspheres in the antibacterial complex solution, and ultrasonically assisted immersion for 4h, and then vacuum dry at 40℃ for 12h to obtain drug-loaded microspheres. B2. Disperse 5g of drug-loaded microspheres in 200mL of 3wt% gelatin aqueous solution, and add 200mL of 2wt% sodium alginate aqueous solution and 50mL of 5wt% calcium chloride aqueous solution dropwise while stirring. Control the dropwise addition time to 1h. After the dropwise addition is completed, continue stirring for 1h to carry out ion cross-linking coating. Filter, wash 3 times with deionized water, and then freeze-dry to obtain antibacterial functional material. Example 5
[0023] This embodiment provides an antibacterial, high-elasticity plant protein composite combed cotton yarn, comprising the following raw materials in parts by weight: The mixture contains 70 parts combed cotton fiber, 20 parts plant protein-based elastomer prepared in Example 1, 8 parts antibacterial functional material prepared in Example 4, 3 parts interface compatibilizer, and 1.5 parts antioxidant. The combed cotton fiber has a fiber length of 29 mm, a micronaire value of 3.7, and a short fiber content of less than 8%. The interface compatibilizer is a compound of silane coupling agent KH-560 and polyethyleneimine (molecular weight 10000) in a mass ratio of 1:0.5. The antioxidant is a composition of equal mass of vitamin E and rosemary extract. This type of antibacterial, high-elasticity plant protein composite combed cotton yarn is prepared through the following steps: S1. Mix combed cotton fibers with plant protein-based elastomer, then spray with interface compatibilizer, dry in an oven at 45°C for 40 minutes, then add antibacterial functional materials and antioxidants, loosen and mix for 20 minutes to obtain pretreated mixture; S2. After the pretreated mixture undergoes cleaning, carding, drawing, and roving processes, it is spun on a ring spinning machine using compact Siro spinning, with the twist coefficient controlled at 380, to produce 40-count yarn. The yarn is then wound into a bobbin to obtain antibacterial, high-elasticity plant protein composite combed cotton yarn. Example 6
[0024] This embodiment provides an antibacterial, high-elasticity plant protein composite combed cotton yarn, comprising the following raw materials in parts by weight: The mixture contains 78 parts combed cotton fiber, 15 parts plant protein-based elastomer prepared in Example 2, 5 parts antibacterial functional material prepared in Example 4, 2 parts interface compatibilizer, and 1 part antioxidant; wherein the combed cotton fiber has a fiber length of 30 mm, a micronaire value of 4.0, and a short fiber content of less than 8%; the interface compatibilizer is a compound of silane coupling agent KH-560 and polyethyleneimine (molecular weight 10000) in a mass ratio of 1:0.8; and the antioxidant is a composition of vitamin E and rosemary extract mixed in equal mass. This type of antibacterial, high-elasticity plant protein composite combed cotton yarn is prepared through the following steps: S1. Mix combed cotton fibers with plant protein-based elastomer, then spray with interface compatibilizer, dry in an oven at 50°C for 30 minutes, then add antibacterial functional materials and antioxidants, loosen and mix for 20 minutes to obtain pretreated mixture; S2. After the pretreated mixture undergoes cleaning, carding, drawing, and roving processes, it is spun on a ring spinning machine using compact Siro spinning, with the twist coefficient controlled at 400, to produce 40-count yarn. The yarn is then wound into a bobbin to obtain antibacterial, high-elasticity plant protein composite combed cotton yarn. Example 7
[0025] This embodiment provides an antibacterial, high-elasticity plant protein composite combed cotton yarn, comprising the following raw materials in parts by weight: The mixture contains 85 parts combed cotton fiber, 10 parts plant protein-based elastomer prepared in Example 3, 3 parts antibacterial functional material prepared in Example 4, 1 part interface compatibilizer, and 0.5 parts antioxidant. The combed cotton fiber has a fiber length of 31 mm, a micronaire value of 4.2, and a short fiber content of less than 8%. The interface compatibilizer is a compound of silane coupling agent KH-560 and polyethyleneimine (molecular weight 10000) in a mass ratio of 1:1. The antioxidant is a composition of equal mass of vitamin E and rosemary extract. This type of antibacterial, high-elasticity plant protein composite combed cotton yarn is prepared through the following steps: S1. Mix combed cotton fibers with plant protein-based elastomer, then spray with interface compatibilizer, dry in an oven at 55℃ for 20 minutes, then add antibacterial functional materials and antioxidants, loosen and mix for 20 minutes to obtain pretreated mixture; S2. After the pretreated mixture undergoes cleaning, carding, drawing, and roving processes, it is spun on a ring spinning machine using compact Siro spinning, with the twist coefficient controlled at 420, to produce 40-count yarn. The yarn is then wound into a bobbin to obtain antibacterial, high-elasticity plant protein composite combed cotton yarn.
[0026] Comparative Example 1 The difference between this comparative example and Example 6 is that the plant protein-based elastomer and antibacterial functional material of the present invention are not used. Instead, a common raw material ratio on the market is used: 85 parts combed cotton fiber, 15 parts polyester staple fiber containing silver-based antibacterial agent, and the rest of the raw materials are the same. A conventional polyester-cotton blending process (cotton cleaning-carding-drawing-roving-spinning) is used to spin 40-count yarn.
[0027] Comparative Example 2 The difference between this comparative example and Example 6 is that an equal amount of spandex staple fiber was used to replace the plant protein-based elastomer, while the other raw materials and steps were the same.
[0028] Comparative Example 3 The difference between this comparative example and Example 6 is that the drug-loaded microspheres prepared in step B1 of Example 4 are used to replace the antibacterial functional material in an equal amount, while the other raw materials and steps are the same.
[0029] Performance tests were conducted on Examples 5-7 and Comparative Examples 1-3. The initial antibacterial rate (Staphylococcus aureus) was measured using the oscillation method according to GB / T 20944.3-2008 standard; the antibacterial rate after washing according to AATCC 61-2A standard was also measured; the breaking strength was determined according to GB / T 3916-2013 standard; the single yarn was stretched to 50% constant elongation, held for 1 minute, released, and allowed to stand for 3 minutes before testing and recording the initial elastic recovery rate; 1000 cycles of 50% constant elongation stretching were performed, and the fatigue elastic recovery rate on the 1000th cycle was tested and recorded. The results are shown in Table 1. Table 1 As can be seen from the data in Table 1, Examples 5-7 of the present invention are comprehensively and significantly superior to all comparative examples in terms of core indicators such as initial antibacterial rate, antibacterial rate after washing, initial elastic recovery rate, and elastic recovery rate after fatigue. This fully demonstrates the superiority of the raw material system composed of plant protein-based elastomers, antibacterial functional materials, and compounded interface compatibilizers.
[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An antibacterial, high-elasticity plant protein composite combed cotton yarn, characterized in that, Including the following parts by weight of raw materials: Combed cotton fiber 70-85 parts, plant protein-based elastomer 10-20 parts, antibacterial functional material 3-8 parts, interface compatibilizer 1-3 parts, antioxidant 0.5-1.5 parts; The plant protein-based elastomer is prepared by the following steps: A1. Add urea and ethylene glycol to a borate buffer solution with pH=9.5 and stir to dissolve. Then add soy protein isolate and silk fibroin and stir to mix for 2 hours in a water bath at 60-75℃. Then cool down to 40℃ and add crosslinking agent and bio-based plasticizer. Perform crosslinking and plasticizing reaction for 4 hours under stirring to obtain spinning solution. A2. The spinning solution is passed through a spinneret and pressed into an ethanol coagulation bath to form nascent protein fiber filaments. After stretching, the filaments are dried with hot air and then cut into short fibers to obtain plant protein-based elastomers.
2. The antibacterial, high-elasticity plant protein composite combed cotton yarn according to claim 1, characterized in that, The ratio of urea, ethylene glycol, borate buffer, soy protein isolate, silk fibroin, crosslinking agent and bio-based plasticizer is 40g:25g:500mL:30-50g:10g:2g:3-3.5g.
3. The antibacterial, high-elasticity plant protein composite combed cotton yarn according to claim 1, characterized in that, The crosslinking agent is genipin, and the bio-based plasticizer is triethyl citrate.
4. The antibacterial, high-elasticity plant protein composite combed cotton yarn according to claim 1, characterized in that, The combed cotton fiber has a fiber length of not less than 29 mm, a micronaire value of 3.7-4.2, and a short fiber content of less than 8%.
5. The antibacterial, high-elasticity plant protein composite combed cotton yarn according to claim 1, characterized in that, The antibacterial functional material is prepared through the following steps: B1. Add tea polyphenols, cinnamaldehyde, and chitosan quaternary ammonium salt to anhydrous ethanol and stir to dissolve to obtain an antibacterial complex solution; then impregnate porous silica microspheres in the antibacterial complex solution, use ultrasonic-assisted impregnation, and then vacuum dry to obtain drug-loaded microspheres; B2. Disperse the drug-loaded microspheres in a gelatin aqueous solution, and add sodium alginate aqueous solution and calcium chloride aqueous solution dropwise while stirring. The addition time is controlled at 1 hour. After the addition is completed, continue stirring for 1 hour. Filter, wash, and freeze dry to obtain the antibacterial functional material.
6. The antibacterial, high-elasticity plant protein composite combed cotton yarn according to claim 1, characterized in that, The ratio of the porous silica microspheres to the antibacterial complex solution is 1g:10mL; the pore size of the porous silica microspheres is 10nm; and the ratio of tea polyphenols, cinnamaldehyde, and chitosan quaternary ammonium salt in the antibacterial complex solution is 2:1:
1.
7. The antibacterial, high-elasticity plant protein composite combed cotton yarn according to claim 1, characterized in that, The ratio of the drug-loaded microspheres, gelatin aqueous solution, sodium alginate aqueous solution, and calcium chloride aqueous solution is 5g:200mL:200mL:50mL; the concentration of the gelatin aqueous solution is 3wt%; the concentration of the sodium alginate aqueous solution is 2wt%; and the concentration of the calcium chloride aqueous solution is 5wt%.
8. The antibacterial, high-elasticity plant protein composite combed cotton yarn according to claim 1, characterized in that, The interface compatibilizer is a compound of silane coupling agent KH-560 and polyethyleneimine in a mass ratio of 1:0.5-1, wherein the molecular weight of the polyethyleneimine is 10000.
9. The antibacterial, high-elasticity plant protein composite combed cotton yarn according to claim 1, characterized in that, The antioxidant is a composition of equal mass of vitamin E and rosemary extract.
10. The method for preparing an antibacterial, high-elasticity plant protein composite combed cotton yarn according to claim 1, characterized in that, Includes the following steps: S1. Mix combed cotton fibers with plant protein-based elastomer, then spray with an interface compatibilizer, pre-treat at 45-55℃ for 20-40 minutes, then add antibacterial functional materials and antioxidants, loosen and mix to obtain a pre-treated mixture. S2. After the pretreated mixture undergoes cleaning, carding, drawing, and roving processes, it is spun into yarn on a spinning machine using compact Siro spinning, with the twist coefficient controlled at 380-420. The yarn is then wound into a bobbin to obtain antibacterial, high-elasticity plant protein composite combed cotton yarn.