An antibacterial and hypoallergenic textile fabric and its preparation process

Abstract

This invention relates to the field of textile fabric technology, and more particularly to an antibacterial and hypoallergenic textile fabric and its preparation process, comprising the following steps: S1, immersing a pure cotton or cotton blend base fabric in a sodium carbonate aqueous solution, heat-treating, washing with water until neutral, and drying to obtain a pretreated base fabric; S2, dispersing shikonin nanocapsules in deionized water to obtain a dispersion, adding water-soluble epoxy resin and a penetrant, stirring at room temperature to obtain a finishing solution; S3, immersing the pretreated base fabric in the finishing solution, controlling the temperature and stirring during immersion, performing two dips and two nips, and drying to obtain an antibacterial and hypoallergenic textile fabric. This invention improves the surface properties of the base fabric through the pretreatment process, reducing impurities and roughness on the base fabric surface, and reducing skin irritation. Simultaneously, the components in the finishing solution can tightly bind with the base fabric fibers, reducing the probability of allergic reactions and improving wearing comfort and safety.

Description

Technical Field

[0001] This invention relates to the field of textile fabric technology, and in particular to an antibacterial and hypoallergenic textile fabric and its preparation process. Background Technology

[0002] Antimicrobial fabrics, with their unique antimicrobial properties, have demonstrated broad application potential in various fields such as medical, home, sports, and outdoor, with market demand showing a continuous growth trend. In the medical field, antimicrobial fabrics are widely used in critical medical supplies such as surgical gowns, bed sheets, masks, and protective clothing, effectively reducing the risk of hospital infections and providing strong protection for medical safety. With the continuous improvement of public health awareness, the application of antimicrobial fabrics in home furnishings is also becoming increasingly popular, such as bedding, towels, and curtains. Through antimicrobial treatment, bacterial growth is significantly reduced, creating a healthier and safer home environment for consumers. Furthermore, in the sports and outdoor sector, sportswear, sports shoes, sports bags, as well as tents, sleeping bags, and outdoor clothing, through antimicrobial treatment, effectively inhibit bacterial growth during exercise, not only improving the hygiene performance of the products but also significantly enhancing the comfort of the wearer. Traditionally, antimicrobial fabrics mainly rely on physical methods, such as utilizing the antimicrobial properties of nanomaterials like silver ions and zinc ions to achieve their antimicrobial effect.

[0003] In existing technologies, physical adsorption antibacterial agents such as silver ions added to fabrics are prone to dissolution or detachment after repeated washing, resulting in a significant decrease in antibacterial performance. Simultaneously, nano-metal ions may oxidize or aggregate under light, sweat, or high-temperature environments, reducing antibacterial activity. Furthermore, highly effective broad-spectrum antibacterial agents such as organohalides often have high sensitizing properties; while low-sensitizing natural antibacterial agents such as chitosan have weak antibacterial strength and poor durability. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides an antibacterial and hypoallergenic textile fabric and its preparation process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A process for preparing an antibacterial and hypoallergenic textile fabric includes the following steps:

[0007] S1. Immerse pure cotton or cotton blended base fabric in sodium carbonate aqueous solution, heat treat for 20-40 minutes, wash with water until neutral, and dry at 80-100℃ to obtain pretreated base fabric.

[0008] S2. Disperse the shikonin nanocapsules in deionized water to obtain a dispersion, add water-soluble epoxy resin and penetrant, and stir at room temperature for 30-60 minutes to obtain a finishing solution;

[0009] S3. Immerse the pretreated base fabric in the finishing solution, control the temperature and stir for 40-80 minutes, then perform two dips and two nips until the pick-up rate is 70-90%, pre-dry at 80-100℃ for 3-8 minutes, bake at 150-180℃ for 1.5-3.5 minutes, wash 2-3 times with 40℃ warm water, and then dry at 60-80℃ to obtain an antibacterial and hypoallergenic textile fabric.

[0010] Furthermore, the two-dip and two-roll process includes first dip and first roll, second dip and roll, and final roll adjustment. The first dip and first roll impregnation conditions are: temperature 30±2℃, time 10-20min, stirring speed 60-80rpm, and rolling parameters: rolling press pressure 0.30-0.40MPa, fabric speed 10-12m / min, and roll-off rate controlled at 85±5%. The second dip and roll impregnation conditions are: temperature 30±2℃, time 15-25min, base fabric rotated 180°, and rolling parameters: rolling press pressure 0.35-0.45MPa, fabric speed 10-12m / min, and roll-off rate controlled at 75±5%. During final roll adjustment, if the roll-off rate is >90%, the pressure is increased to 0.40MPa or the fabric speed is decreased to 8m / min; if the roll-off rate is <70%, the pressure is decreased to 0.25MPa or the impregnation time is increased by 5min.

[0011] Furthermore, in step S1, the concentration of the sodium carbonate aqueous solution is 1-2 wt%, the bath ratio is 1:(15-25), and the heat treatment temperature is 60-70℃.

[0012] Further, in step S2, the water-soluble epoxy resin includes one or more of polyethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, and glycerol polyoxypropylene triglycidyl ether, and the penetrant includes one or more of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, and isomeric alcohol polyoxyethylene ether.

[0013] Furthermore, in step S2, the mass ratio of shikonin nanocapsules, deionized water, water-soluble epoxy resin, and penetrant is (15-20):100:(3-5):(1-3).

[0014] Furthermore, in step S3, the bath ratio is 1:(18-20), the temperature is controlled at 40-45℃, the stirring speed in step S2 is 200-300 rpm, and the stirring speed in step S3 is 50-100 rpm.

[0015] Furthermore, the shikonin nanocapsules in step S2 are prepared through the following steps:

[0016] A1. Dissolve ammonium molybdate tetrahydrate in 0.1M phosphate buffer, add shikonin ethanol solution under light protection and sonicate for 15-25 min, add sodium citrate, stir in water bath for 4-5 h, centrifuge and discard supernatant, wash filter cake with deionized water 3 times, and vacuum dry at 40℃ for 6-8 h to obtain modified shikonin.

[0017] A2. Add dopamine hydrochloride to Tris-HCl buffer and sonicate for 5-10 min. Add modified shikonin under light-protected conditions and stir at room temperature for 6-8 h. Centrifuge, wash the filter cake three times with deionized water, and vacuum dry at 40℃ to constant weight to obtain a dark brown powder.

[0018] Further, in step A1, the mass ratio of ammonium molybdate tetrahydrate, phosphate buffer, shikonin ethanol solution and sodium citrate is (2.5-4):(100-110):(30-40):(0.15-0.3), the pH value of the phosphate buffer is 7.2-7.6, and the concentration of the shikonin ethanol solution is 10-15wt%.

[0019] Further, in step A2, the mass ratio of dopamine hydrochloride, Tris-HCl buffer, and modified shikonin is (0.3-0.4):(150-200):(5-7), and the pH of the Tris-HCl buffer is 8.5-8.8.

[0020] Furthermore, the water bath temperature in step A1 is 38-42℃, the stirring speed in step A1 and step A2 is 300-400rpm, the ultrasonic treatment frequency is 40-50kHz, and the power is 200-300W.

[0021] According to another aspect of the present invention, an antibacterial and hypoallergenic textile fabric prepared by the above-described preparation process is provided.

[0022] The beneficial effects of this invention are:

[0023] 1. This invention utilizes a protective core formed by a stable five-membered chelate ring created by molybdate and shikonin quinone groups, followed by in-situ self-assembly of a dynamically responsive shell using polydopamine through π-π stacking and hydrogen bonding, resulting in a bifunctional core-shell structure. The nanocapsules maintain a highly sealed state in a dry condition, effectively isolating them from light and oxygen erosion. When exposed to sweat or microbial environments, their dynamic shells open release channels. The polydopamine layer on the nanocapsule surface significantly enhances its affinity for fibers, and combined with the high-temperature cross-linking and curing effect of epoxy resin, a strong and dense coating network is formed on the fiber surface. After multiple washing tests, the fabric maintains excellent antibacterial rates, achieving long-lasting protection.

[0024] 2. The antibacterial and hypoallergenic textile fabric prepared by this invention contains shikonin nanocapsules. Shikonin itself has certain antibacterial activity, and its antibacterial effect is significantly enhanced after nanoencapsulation. The nanocapsules can slowly release shikonin, exert a sustained antibacterial effect, effectively inhibit the growth and reproduction of bacteria, and have a good inhibitory effect on common bacteria such as Staphylococcus aureus and Escherichia coli. It can provide users with long-lasting antibacterial protection and reduce the risk of infection and disease caused by bacterial growth.

[0025] 3. This invention improves the surface properties of the base fabric through a pretreatment process, reducing impurities and roughness on the surface and minimizing skin irritation. Simultaneously, the components in the finishing solution bind tightly to the base fabric fibers, forming a uniform protective film, reducing the likelihood of allergic reactions and improving wearing comfort and safety. Pure cotton or cotton blend base fabrics inherently possess excellent breathability and moisture absorption, keeping the skin dry and comfortable. After pretreatment and finishing, the fabric's softness and hand feel are further enhanced, resulting in a more fitted and comfortable fit without causing any feeling of restriction or discomfort.

[0026] 4. The antibacterial and hypoallergenic textile fabric prepared by this invention undergoes subsequent processing such as two dips and two nips, pre-drying, and baking, which enables the effective components in the finishing solution to form strong chemical bonds with the base fabric fibers, thereby improving the durability of the fabric's antibacterial and hypoallergenic properties. Detailed Implementation

[0027] The technical solution 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Preparation Example 1

[0029] Shikonin nanocapsules are prepared through the following steps:

[0030] A1. Dissolve 25g of ammonium molybdate tetrahydrate in 1000g of 0.1M phosphate buffer solution with pH 7.2. Under light-protected conditions, add 300g of 10wt% shikonin ethanol solution and sonicate for 15min. The sonication frequency is 40kHz and the power is 200W. After adding 1.5g of sodium citrate, the mixture is stirred at 300rpm in a water bath at 38℃ for 4h. Centrifuge and discard the supernatant. Wash the filter cake three times with deionized water and vacuum dry at 40℃ for 6h to obtain modified shikonin.

[0031] A2. Add 3g of dopamine hydrochloride to 1500g of 10mM Tris-HCl buffer with pH 8.5 and sonicate for 5min. The sonication frequency is 40kHz and the power is 200W. Air is introduced to maintain the dissolved oxygen concentration at 0.25mM. Add 50g of modified shikonin under light-protected conditions. Stir at 300rpm for 6h at room temperature. Centrifuge, wash the filter cake three times with deionized water, and vacuum dry at 40℃ to constant weight to obtain a dark brown powder.

[0032] Preparation Example 2

[0033] Shikonin nanocapsules are prepared through the following steps:

[0034] A1. Dissolve 32g of ammonium molybdate tetrahydrate in 1050g of 0.1M phosphate buffer solution with pH 7.4. Add 350g of 12wt% shikonin ethanol solution under light-protected conditions and sonicate for 20min at a frequency of 45kHz and a power of 250W. After adding 2g of sodium citrate, stir the mixture at 350rpm in a water bath at 40℃ for 4.5h. Centrifuge and discard the supernatant. Wash the filter cake three times with deionized water and vacuum dry at 40℃ for 7h to obtain modified shikonin.

[0035] A2. Add 3.5g of dopamine hydrochloride to 1700g of 10mM Tris-HCl buffer with pH 8.6 and sonicate for 7min. The sonication frequency is 45kHz and the power is 250W. Maintain the dissolved oxygen concentration at 0.3mM. Add 61g of modified shikonin under light-protected conditions. Stir at 350rpm for 7h at room temperature. Centrifuge, wash the filter cake three times with deionized water, and vacuum dry at 40℃ to constant weight to obtain a dark brown powder.

[0036] Preparation Example 3

[0037] Shikonin nanocapsules are prepared through the following steps:

[0038] A1. Dissolve 40g of ammonium molybdate tetrahydrate in 1100g of 0.1M phosphate buffer with pH 7.6. Add 400g of 15wt% shikonin ethanol solution under light-protected conditions and sonicate for 25min at a frequency of 50kHz and a power of 300W. After adding 3g of sodium citrate, stir the mixture at 400rpm for 5h in a water bath at 42℃. Centrifuge and discard the supernatant. Wash the filter cake three times with deionized water and vacuum dry at 40℃ for 8h to obtain modified shikonin.

[0039] A2. Add 4g of dopamine hydrochloride to 2000g of 10mM Tris-HCl buffer with pH 8.8 and sonicate for 10min. The sonication frequency is 50kHz and the power is 300W. Maintain the dissolved oxygen concentration at 0.35mM. Add 70g of modified shikonin under light-protected conditions. Stir at 400rpm for 8h at room temperature. Centrifuge, wash the filter cake three times with deionized water, and vacuum dry at 40℃ to constant weight to obtain a dark brown powder.

[0040] Example 1

[0041] A process for preparing an antibacterial and hypoallergenic textile fabric includes the following steps:

[0042] S1. The pure cotton base fabric is immersed in a sodium carbonate aqueous solution with a concentration of 1wt% and a bath ratio of 1:15. It is heat-treated at 60℃ for 20 minutes, washed with water until neutral, and then dried at 80℃ to obtain the pretreated base fabric.

[0043] S2. Disperse 150g of the shikonin nanocapsules prepared in Example 1 in 1000g of deionized water to obtain a dispersion. Add 30g of polyethylene glycol diglycidyl ether and 10g of fatty alcohol polyoxyethylene ether. Stir at 200rpm for 30min at room temperature to obtain a finishing solution.

[0044] S3. Immerse the pretreated base fabric in the finishing solution at a bath ratio of 1:18, stir and soak at 50 rpm for 40 min at 40℃, then dip and nibble twice until the pick-up rate is 70%, pre-dry at 80℃ for 3 min, bake at 150℃ for 1.5 min, wash twice with 40℃ warm water, and dry at 60℃ to obtain an antibacterial and hypoallergenic textile fabric.

[0045] Example 2

[0046] A process for preparing an antibacterial and hypoallergenic textile fabric includes the following steps:

[0047] S1. The cotton blended base fabric is immersed in a sodium carbonate aqueous solution with a concentration of 1.5wt% at a bath ratio of 1:20, heat-treated at 65℃ for 30 min, washed with water until neutral, and then dried at 90℃ to obtain the pretreated base fabric.

[0048] S2. Disperse 180g of the shikonin nanocapsules prepared in Example 2 in 1000g of deionized water to obtain a dispersion. Add 40g of polyethylene glycol diglycidyl ether and 20g of fatty alcohol polyoxyethylene ether. Stir at 250rpm for 45min at room temperature to obtain a finishing solution.

[0049] S3. Immerse the pretreated base fabric in the finishing solution at a bath ratio of 1:19, stir and soak at 60 rpm for 60 min at 42℃, then perform two dips and two nips until the pick-up rate is 80%, pre-dry at 90℃ for 6 min, bake at 170℃ for 2 min, wash twice with 40℃ warm water, and dry at 70℃ to obtain an antibacterial and hypoallergenic textile fabric.

[0050] Example 3

[0051] A process for preparing an antibacterial and hypoallergenic textile fabric includes the following steps:

[0052] S1. Immerse pure cotton or cotton blended base fabric in a 2wt% sodium carbonate aqueous solution with a bath ratio of 1:25, heat treat at 70℃ for 40 min, wash with water until neutral, and dry at 100℃ to obtain pretreated base fabric.

[0053] S2. Disperse 200g of the shikonin nanocapsules prepared in Example 3 in 1000g of deionized water to obtain a dispersion. Add 50g of polypropylene glycol diglycidyl ether and 30g of fatty alcohol polyoxyethylene ether. Stir at 300rpm for 60min at room temperature to obtain a finishing solution.

[0054] S3. The pretreated base fabric is immersed in the finishing solution at a bath ratio of 1:20. It is stirred and immersed at 100 rpm for 80 min at 45℃. After two dips and two nips until the pick-up rate is 90%, it is pre-dried at 100℃ for 8 min, baked at 180℃ for 3.5 min, washed three times with warm water at 40℃, and then dried at 80℃ to obtain an antibacterial and hypoallergenic textile fabric.

[0055] Comparative Example 1

[0056] The difference between this comparative example and Preparation Example 1 is that ammonium molybdate tetrahydrate is not added; the remaining steps are the same as in Preparation Example 1.

[0057] Comparative Example 2

[0058] The difference between this comparative example and preparation example 2 is that dopamine hydrochloride is not added; the remaining steps are the same as in preparation example 2.

[0059] Comparative Example 3

[0060] The difference between this comparative example and Example 1 is that the modified shikonin obtained in Comparative Example 1 is used instead of the shikonin nanocapsules obtained in Preparation Example 1, while the remaining steps are the same as in Example 1.

[0061] Comparative Example 4

[0062] The difference between this comparative example and Example 2 is that the modified shikonin obtained in Comparative Example 2 is used instead of the shikonin nanocapsules obtained in Preparation Example 2, while the remaining steps are the same as in Example 2.

[0063] Comparative Example 5

[0064] The difference between this comparative example and Example 3 is that commercially available shikonin was used instead of the shikonin nanocapsules prepared in Example 3, while the remaining steps were the same as in Example 3.

[0065] Referring to GB / T 20944.3-2008 "Evaluation of Antimicrobial Properties of Textiles - Part 3: Shaking Method", Staphylococcus aureus (ATCC 6538) was streaked onto nutrient agar plates and incubated at 37°C for 24 h. A single colony was picked and inoculated into 5 mL of nutrient broth, and incubated at 37°C with shaking for 18 h. The culture was centrifuged for 10 min, the supernatant was discarded, and the culture was resuspended in phosphate buffer (0.03 mol / L, pH=7.2±0.1). The suspension was diluted with phosphate buffer to McFarland turbidity of 0.5, and then serially diluted to a working concentration of 5×10⁻⁶. 5 CFU / mL, for later use. Cut each test fabric from Examples 1-3, Comparative Examples 3-5, and the blank base fabric (blank group) into 5.0cm × 5.0cm squares, autoclave at 121℃ for 15 min, and dry at 60℃ for later use. Add 30mL of phosphate buffer to a sterile conical flask, and add 1.0mL of Staphylococcus aureus suspension (final concentration 5 × 10⁻⁶). 4 (CFU / mL), add one sterile sample, seal the bottle, and place it in a constant temperature shaker at 37℃ and 150 rpm for 18 hours. Take 1.0 mL of the shaken solution and perform a 10-fold serial dilution with phosphate buffer (10 CFU / mL). -1 , 10 -2 , 10 -3 Spread 100 μL of the diluted solution onto a nutrient agar plate, incubate at 37°C for 24 h, count the effective colonies, and calculate the colony concentration and antibacterial rate using the following formula:

[0066]

[0067]

[0068] The results are shown in Table 1:

[0069] Table 1. Results of antibacterial test for Staphylococcus aureus

[0070]

[0071] Fabrics from Examples 1-3 and Comparative Examples 3-5 were cut into 20cm × 20cm samples. The blank group consisted of untreated base fabric of the same specifications. Ten washing cycles were performed. Each washing cycle was as follows: washing at 40℃±3℃, detergent concentration of 4g / L, liquor ratio of 1:30, and a loading weight of 1.0kg (sample + accompanying fabric). Washing time was 45min, followed by two rinses at room temperature for 5min each, centrifugation, and drying in a 60℃ oven. The washing solution was prepared according to GB / T 12490-2014 "Textiles - Tests for Color Fastness to Domestic and Commercial Washing". After 10 washing cycles, the antibacterial rate against Staphylococcus aureus was tested using the above method, and the retention rate was calculated as: Retention rate = (Antibacterial rate after washing / Initial antibacterial rate) × 100%. The results are shown in Table 2.

[0072] Table 2. Results of changes in antibacterial performance after 10 washing cycles

[0073]

[0074] Twenty healthy volunteers with no history of allergies were randomly selected and randomly divided into four groups to test Examples 1-3 and Comparative Example 5, respectively. 2cm × 2cm pieces of fabric were cut, sterilized, and applied to the inner upper arm. After 48 hours, the fabric was removed, and skin reactions were recorded. Subjects scored their reactions using the following criteria: 0, no reaction; 1, mild erythema (scattered, poorly defined); 2, moderate erythema (confluent, edema); 3, severe erythema (with blisters or erosions). The results are shown in Table 3.

[0075] Table 3. Results of skin patch test

[0076]

[0077] As shown in Tables 1 and 2, the antibacterial rates of Examples 1-3 were all relatively high, at 93.5±0.6%, 95.3±0.4%, and 96.8±0.4%, respectively. The antibacterial rates of Comparative Examples 3-5 were significantly lower than those of the Examples 1-3. The antibacterial rate of Comparative Example 3 was 15.8±0.7%, the antibacterial rate of Comparative Example 4 was 55.3±0.9%, and the antibacterial rate of Comparative Example 5 was only 3.9±0.5%. This indicates that the antibacterial and hypoallergenic textile fabrics prepared using the shikonin nanocapsules obtained in Examples 1-3 possess excellent antibacterial properties.

[0078] The antibacterial properties of Examples 1-3 were high after washing, at 99.1%, 98.8%, and 99.0%, respectively. The antibacterial properties of Comparative Examples 3-5 were low after washing, at 41.1% for Comparative Example 3, 24.1% for Comparative Example 4, and 0% for Comparative Example 5. This indicates that the antibacterial and hypoallergenic textile fabric prepared using shikonin nanocapsules can still maintain good antibacterial properties after multiple washes.

[0079] In Preparation Examples 1-3, during the preparation of shikonin nanocapsules, shikonin was first modified with ammonium molybdate tetrahydrate, and then dopamine hydrochloride was added to form nanocapsules. The formation of nanocapsules may have enhanced the stability and bioactivity of shikonin, allowing it to function better on fabrics and thus improving its antibacterial properties. In Comparative Example 1, no ammonium molybdate tetrahydrate was added, so shikonin may not have been effectively modified, leading to reduced antibacterial activity; therefore, the antibacterial rate of Comparative Example 3 was significantly lower than that of Example 1. In Comparative Example 2, no dopamine hydrochloride was added, and nanocapsules could not be formed; shikonin may not have been effectively protected and fixed, leading to reduced antibacterial activity; therefore, the antibacterial rate of Comparative Example 4 was significantly lower than that of Example 2. Comparative Example 5 used commercially available shikonin without modification or nanocapsule formation, exhibiting the lowest antibacterial activity, indicating that modification and nanocapsule formation are crucial for improving the antibacterial effect of shikonin.

[0080] As shown in Table 3, the average skin reaction scores for Examples 1-3 were all low, with Example 1 scoring 0, Example 2 scoring 0, and Example 3 scoring 0.2. This indicates that the antibacterial and anti-allergic textile fabrics prepared using the shikonin nanocapsules obtained in Examples 1-3 have low skin irritation and good anti-allergic properties. In contrast, the average skin reaction score for Comparative Example 5 was 0.6, significantly higher than that of the Examples, indicating that the fabric prepared using commercially available shikonin had relatively high skin irritation and poor anti-allergic properties. This further demonstrates that after modification and nanocapsule formation, shikonin not only improved its antibacterial properties but also reduced its skin irritation.

[0081] In summary, the antibacterial and anti-allergic textile fabrics prepared using the shikonin nanocapsules obtained in Preparation Examples 1-3 exhibit excellent antibacterial and anti-allergic properties, as well as a high retention rate of antibacterial properties after washing.

[0082] In the description of this specification, the terms "preparation example," "example," "various examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that example or preparation example, which are included in at least one example or preparation example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same example or preparation example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more examples or preparation examples.

[0083] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A preparation process for an antibacterial and hypoallergenic textile fabric, characterized in that, Includes the following steps: S1. Immerse pure cotton or cotton blended base fabric in sodium carbonate aqueous solution, heat treat for 20-40 minutes, wash with water until neutral, and then dry to obtain pretreated base fabric. S2. Disperse the shikonin nanocapsules in deionized water to obtain a dispersion, add water-soluble epoxy resin and penetrant, and stir at room temperature for 30-60 minutes to obtain a finishing solution; S3. Immerse the pretreated base fabric in the finishing solution, control the temperature and stir for 40-80 minutes, then perform two dips and two nips until the pick-up rate is 70-90%, and dry to obtain an antibacterial and hypoallergenic textile fabric. In step S2, the shikonin nanocapsules are prepared through the following steps: A1. Dissolve ammonium molybdate tetrahydrate in phosphate buffer, add shikonin ethanol solution under light-protected conditions and sonicate for 15-25 min. After adding sodium citrate, stir the reaction in a water bath for 4-5 h. Centrifuge, discard the supernatant, wash and dry to obtain modified shikonin. A2. Add dopamine hydrochloride to Tris-HCl buffer and sonicate for 5-10 min. Add modified shikonin under light-protected conditions and stir at room temperature for 6-8 h. Centrifuge, wash, and dry to obtain shikonin nanocapsules.

2. The preparation process of an antibacterial and hypoallergenic textile fabric according to claim 1, characterized in that, In step S1, the concentration of the sodium carbonate aqueous solution is 1-2 wt%, the bath ratio is 1:(15-25), and the heat treatment temperature is 60-70℃.

3. The preparation process of an antibacterial and hypoallergenic textile fabric according to claim 1, characterized in that, In step S2, the water-soluble epoxy resin includes one or more of polyethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, and glycerol polyoxypropylene triglycidyl ether, and the penetrant includes one or more of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, and isomeric alcohol polyoxyethylene ether.

4. The preparation process of an antibacterial and hypoallergenic textile fabric according to claim 1, characterized in that, In step S2, the mass ratio of shikonin nanocapsules, deionized water, water-soluble epoxy resin and penetrant is (15-20):100:(3-5):(1-3).

5. The preparation process of an antibacterial and hypoallergenic textile fabric according to claim 1, characterized in that, In step S3, the liquor ratio is 1:(18-20), the temperature is controlled at 40-45℃, the stirring speed in step S2 is 200-300 rpm, and the stirring speed in step S3 is 50-100 rpm.

6. The preparation process of an antibacterial and hypoallergenic textile fabric according to claim 1, characterized in that, In step A1, the mass ratio of ammonium molybdate tetrahydrate, phosphate buffer, shikonin ethanol solution and sodium citrate is (2.5-4):(100-110):(30-40):(0.15-0.3), the pH value of the phosphate buffer is 7.2-7.6, and the concentration of shikonin ethanol solution is 10-15wt%.

7. The preparation process of an antibacterial and hypoallergenic textile fabric according to claim 1, characterized in that, In step A2, the mass ratio of dopamine hydrochloride, Tris-HCl buffer, and modified shikonin is (0.3-0.4):(150-200):(5-7), and the pH of the Tris-HCl buffer is 8.5-8.

8.

8. The preparation process of an antibacterial and hypoallergenic textile fabric according to claim 1, characterized in that, The water bath temperature in step A1 is 38-42℃, and the stirring speed in both step A1 and step A2 is 300-400 rpm.

9. An antibacterial and hypoallergenic textile fabric prepared by the preparation process according to any one of claims 1-8.

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