A highly abrasion-resistant and antibacterial denim fabric, its preparation method and application

Abstract

This invention relates to a highly abrasion-resistant and antibacterial denim fabric, its preparation method, and its application, belonging to the technical field of denim fabrics. The fabric comprises a first abrasion-resistant and antibacterial layer, an adhesive layer, a second abrasion-resistant and antibacterial layer, and a breathable layer arranged sequentially. The first abrasion-resistant and antibacterial layer is woven from a coated yarn of cuprous oxide-reduction graphene polyester and spandex; the coated yarn has spandex as the core yarn and cuprous oxide-reduction graphene polyester as the outer fiber. The second abrasion-resistant and antibacterial layer is a composite layer of nano-silver and polyvinyl alcohol. The breathable layer is woven from a blend of cotton and viscose fiber yarn. This fabric exhibits good abrasion resistance, good breathability and moisture absorption, and provides excellent comfort.

Description

Technical Field

[0001] This invention relates to the technical field of denim fabrics, specifically to a highly abrasion-resistant and antibacterial denim fabric, its preparation method, and its applications. Background Technology

[0002] Traditional denim fabric is mostly made of pure cotton, with both warp and weft yarns woven from pure cotton. Cotton fiber is the most common natural cellulose fiber, long and soft, with a multi-layered, hollow structure and natural longitudinal "twists." The cellulose macromolecules contain many hydrophilic groups (-OH), making it highly absorbent. Therefore, cotton is soft and skin-friendly, with good moisture absorption and dyeing properties. Pure cotton denim fabric is highly absorbent, comfortable to wear, and comes in vibrant colors and a wide variety of patterns. However, pure cotton denim fabric wrinkles easily, shrinks easily, and has poor shape retention. Furthermore, when the body sweats heavily, the absorbed sweat is not easily released, making the garment heavy and causing a sticky, stuffy feeling after prolonged wear. It can also accelerate the growth of harmful bacteria. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a highly abrasion-resistant and antibacterial denim fabric, its preparation method and application, which can improve the abrasion resistance of the fabric, and has good breathability and moisture absorption, and good comfort.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] In a first aspect, the present invention provides a highly abrasion-resistant and antibacterial denim fabric, comprising a first abrasion-resistant and antibacterial layer, an adhesive layer, a second abrasion-resistant and antibacterial layer, and a breathable layer arranged sequentially; wherein, the first abrasion-resistant and antibacterial layer is woven from a covered yarn of cuprous oxide-reduction graphene polyester and spandex; the covered yarn has spandex as the core yarn and cuprous oxide-reduction graphene polyester as the outer fiber; the second abrasion-resistant and antibacterial layer is a composite layer of nano-silver and polyvinyl alcohol; the breathable layer is woven from a blended yarn of cotton and viscose fiber.

[0006] Preferably, the preparation method of the cuprous oxide-redox graphene polyester includes the following steps:

[0007] (1) Polyester and dopamine solution (DA) were mixed under alkaline conditions and in-situ polymerization was carried out to obtain polydopamine (PDA)-polyester (PET).

[0008] (2) The polydopamine-polyester was immersed in a graphene oxide (GO) dispersion, taken out and dried to obtain graphene oxide-polydopamine-polyester;

[0009] (3) Immerse graphene oxide-polydopamine-polyester in copper sulfate solution, then add alkaline solution and reducing agent, take it out and dry it to obtain cuprous oxide (Cu2O)-redox graphene (rGO) polyester.

[0010] Cuprous oxide (Cu₂O) is a common antibacterial agent, but its uncontrollable copper ion release rate limits its application in antibacterial materials. The high conductivity and carrier mobility of reduced-oxidation graphene, acting as a carrier for cuprous oxide, improve its dispersibility in water and prevent its aggregation, thereby enhancing its sustained release performance. Furthermore, the polydopamine layer formed by the oxidative self-polymerization of dopamine exhibits excellent interfacial adhesion, allowing cuprous oxide to adhere uniformly to the surface of polyester (PET), thus endowing the polyester material with long-lasting antibacterial properties.

[0011] Preferably, the mass concentration of the dopamine solution is 0.2~0.5 g / L.

[0012] Preferably, the mass concentration of the graphene oxide dispersion is 1~3 g / L.

[0013] Preferably, the molar concentration of the copper sulfate solution is 0.005~0.01 mol / L.

[0014] Preferably, the molar concentration of the alkaline solution is 1~2 mol / L, and the molar concentration of the reducing agent is 1~2 mol / L.

[0015] Preferably, the linear density of the covering yarn is 20-40 tex, and the linear density of the spandex is 3-4 tex.

[0016] Preferably, the linear density of the cotton is 20-40 tex, and the linear density of the viscose fiber is 20-30 tex.

[0017] Preferably, the mass ratio of cotton to viscose fiber is (40~60):(40~60). Cotton fiber has high strength and abrasion resistance, while viscose fiber increases the softness and drape of the fabric. The combination of the two can improve the overall durability of the fabric. Within the above range, a fabric with high strength and good moisture absorption can be obtained.

[0018] Secondly, the present invention provides a method for preparing the highly abrasion-resistant and antibacterial denim fabric, comprising the following steps:

[0019] S1 uses spandex as the core yarn and cuprous oxide-reduction graphene polyester as the outer fiber to make a covering yarn, which is then woven into a fabric to obtain the first wear-resistant and antibacterial layer.

[0020] S2 is made by weaving a blend of cotton and viscose fiber into a fabric to create a breathable layer.

[0021] S3 mixes nano-silver and polyvinyl alcohol to prepare an electrospinning solution;

[0022] S4 The electrospinning solution is sprayed onto the surface of the breathable layer using electrospinning technology and then cured to obtain the second wear-resistant and antibacterial layer.

[0023] S5 applies glue to the surface of the second abrasion-resistant and antibacterial layer, and then bonds it to the first abrasion-resistant and antibacterial layer through an adhesive layer to obtain the highly abrasion-resistant and antibacterial denim fabric.

[0024] Preferably, the electrospinning solution comprises the following components by weight: 1-3 parts nano-silver, 7-9 parts polyvinyl alcohol, 5-8 parts formic acid, 10-15 parts acetic acid, 10-15 parts glue, and 260-440 parts water. This invention uses electrospinning technology to physically composite nano-silver and polyvinyl alcohol, a simple, non-toxic, and pollution-free process. To better integrate the nano-silver and polyvinyl alcohol composite layer with the breathable layer, glue is added to the electrospinning solution. The electrospinning solution is then electrospun and deposited onto the breathable layer to form the nano-silver and polyvinyl alcohol composite layer, which is the second wear-resistant and antibacterial layer.

[0025] Preferably, in step S4, the parameters of the electrospinning are: spinning speed 0.2~1mL / h, spinning distance 10~15cm, and spinning voltage 20~30kV.

[0026] Thirdly, this invention provides the application of highly abrasion-resistant and antibacterial denim fabric in the manufacture of denim garments. Compared with the prior art, the beneficial effects of this invention are:

[0027] (1) The first abrasion-resistant and antibacterial layer in the denim fabric of the present invention is a yarn wrapped with cuprous oxide-reduction graphene polyester and spandex, so that the yarn has both the abrasion-resistant properties of the spandex core yarn and the abrasion resistance and comfort performance can be improved by utilizing the properties of the outer fiber of cuprous oxide-reduction graphene polyester. The second abrasion-resistant and antibacterial layer is a composite layer of nano-silver and polyvinyl alcohol. Nano-silver can play a good antibacterial role. Since polyvinyl alcohol has high strength and high modulus, adding it to the fabric can improve the mechanical strength and durability of the fabric. The breathable layer is the innermost layer. Cotton fiber is known for its softness, breathability and good moisture absorption, while viscose fiber has good softness and smooth hand feel. This composite fabric can provide a high level of wearing comfort. Therefore, when wearing this fabric, the body can wick away sweat in time, thereby improving the wearing comfort and preventing the growth of bacteria in sweat.

[0028] (2) The denim fabric of the present invention is comfortable, durable and antibacterial, suitable for long-term wear, especially suitable for front-line workers and other occupations with high labor intensity. Attached Figure Description

[0029] Figure 1 This is a diagram showing the layered structure of the denim fabric of the present invention;

[0030] In the diagram: 1. First wear-resistant and antibacterial layer; 2. Adhesive layer; 3. Second wear-resistant and antibacterial layer; 4. Breathable layer. Detailed Implementation

[0031] To better illustrate the purpose, technical solution, and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0032] The reagents used in the following examples and comparative examples are as follows:

[0033] Graphene oxide: Manufacturer: Jiangsu Xianfeng Nanomaterials Technology Co., Ltd., Grade: 103080;

[0034] Nano silver (powder): Manufacturer is Jiangsu Xianfeng Nanomaterials Technology Co., Ltd., grade 100937;

[0035] Adhesive: Water-based polyurethane adhesive, manufactured by Hefei Dibang Nanotechnology Co., Ltd., brand name QTJS-1671;

[0036] Dopamine: Manufacturer is Henan Puhui Tiancheng Biotechnology Co., Ltd.;

[0037] Polyvinyl alcohol: Manufacturer is Shanghai Yanze Chemical Co., Ltd.;

[0038] Formic acid: manufactured by Shanghai Aladdin Biochemical Technology Co., Ltd.

[0039] Acetic acid: manufactured by Shanghai Aladdin Biochemical Technology Co., Ltd.

[0040] Cuprous oxide: Manufacturer is Taixing Smelting Plant Co., Ltd., grade: Cuprous oxide (calcination method);

[0041] Anhydrous copper sulfate: manufactured by Taixing Smelting Plant Co., Ltd.;

[0042] Pyrrole: Manufacturer is Henan Wanxiang Chemical Co., Ltd.

[0043] Unless otherwise specified, all other materials and reagents used in the examples are commercially available.

[0044] Example 1

[0045] A highly durable and antibacterial denim fabric, such as Figure 1As shown, the structure includes a first wear-resistant and antibacterial layer 1, an adhesive layer 2, a second wear-resistant and antibacterial layer 3, and a breathable layer 4, arranged sequentially. The first wear-resistant and antibacterial layer 1 is woven from a cover yarn of cuprous oxide-reduction graphene polyester and spandex (3tex / 10F). The cover yarn has spandex as the core yarn and cuprous oxide-reduction graphene polyester as the outer fiber. The second wear-resistant and antibacterial layer 3 is a composite layer of nano-silver and polyvinyl alcohol. The breathable layer 4 is woven from a blend of cotton (25tex) and viscose fiber (25tex). The mass ratio of cotton to viscose fiber is 50:50. The linear density of the cover yarn is 30tex.

[0046] The preparation method of the cuprous oxide-redox graphene polyester includes the following steps:

[0047] (1) Polyester and dopamine solution were mixed at pH=13 and in-situ polymerization was carried out. After 5 hours of reaction, polydopamine-polyester was obtained; the mass concentration of the dopamine solution was 0.3 g / L.

[0048] (2) The polydopamine-polyester is immersed in the graphene oxide dispersion, taken out and dried to obtain graphene oxide-polydopamine-polyester; the mass concentration of the graphene oxide dispersion is 2 g / L.

[0049] (3) Immerse graphene oxide-polydopamine-polyester in copper sulfate solution, then add alkali solution and reducing agent dropwise, remove and dry to obtain cuprous oxide-redox graphene polyester. The molar concentration of the copper sulfate solution is 0.006 mol / L. The molar concentration of the alkali solution is 1~2 mol / L, and the reducing agent is pyrrole solution with a molar concentration of 1.1 mol / L.

[0050] The method for preparing the highly abrasion-resistant and antibacterial denim fabric includes the following steps:

[0051] S1 uses spandex as the core yarn and cuprous oxide-reduction graphene polyester as the outer fiber to make a covering yarn, which is then woven into a fabric to obtain the first wear-resistant and antibacterial layer 1.

[0052] S2 is made by weaving a blend of cotton and viscose fiber into a fabric to obtain a breathable layer 4;

[0053] S3 mixes nano-silver and polyvinyl alcohol to prepare an electrospinning solution; wherein the electrospinning solution comprises the following components by weight: 2 parts nano-silver, 8 parts polyvinyl alcohol, 6 parts formic acid, 12 parts acetic acid, 12 parts glue and 300 parts water.

[0054] S4 The electrospinning solution is sprayed onto the surface of the breathable layer 4 using electrospinning technology and then cured to obtain the second wear-resistant and antibacterial layer 3; the parameters of the electrospinning are: spinning speed 0.5 mL / h, spinning distance 12 cm, and spinning voltage 25 kV.

[0055] S5 applies glue to the surface of the second abrasion-resistant and antibacterial layer 3, and then attaches it to the first abrasion-resistant and antibacterial layer 1 through the adhesive layer 2 to obtain the highly abrasion-resistant and antibacterial denim fabric.

[0056] Example 2

[0057] A highly durable and antibacterial denim fabric, such as Figure 1 As shown, the structure includes a first wear-resistant and antibacterial layer 1, an adhesive layer 2, a second wear-resistant and antibacterial layer 3, and a breathable layer 4, arranged sequentially. The first wear-resistant and antibacterial layer 1 is woven from a cover yarn of cuprous oxide-reduction graphene polyester and spandex (3tex / 10F). The cover yarn has spandex as the core yarn and cuprous oxide-reduction graphene polyester as the outer fiber. The second wear-resistant and antibacterial layer 3 is a composite layer of nano-silver and polyvinyl alcohol. The breathable layer 4 is woven from a blend of cotton (20tex) and viscose fiber (20tex). The mass ratio of cotton to viscose fiber is 40:60. The linear density of the cover yarn is 20tex.

[0058] The preparation method of the cuprous oxide-redox graphene polyester includes the following steps:

[0059] (1) Polyester and dopamine solution are mixed under alkaline conditions and in-situ polymerization is carried out to obtain polydopamine-polyester after the reaction; the mass concentration of the dopamine solution is 0.2 g / L.

[0060] (2) The polydopamine-polyester is immersed in the graphene oxide dispersion, taken out and dried to obtain graphene oxide-polydopamine-polyester; the mass concentration of the graphene oxide dispersion is 1 g / L.

[0061] (3) Immerse graphene oxide-polydopamine-polyester in copper sulfate solution, then add alkali solution and reducing agent dropwise, remove and dry to obtain cuprous oxide-redox graphene polyester. The molar concentration of the copper sulfate solution is 0.005 mol / L. The molar concentration of the alkali solution is 1 mol / L, and the reducing agent is pyrrole solution with a molar concentration of 1 mol / L.

[0062] The method for preparing the highly abrasion-resistant and antibacterial denim fabric includes the following steps:

[0063] S1 uses spandex as the core yarn and cuprous oxide-reduction graphene polyester as the outer fiber to make a covering yarn, which is then woven into a fabric to obtain the first wear-resistant and antibacterial layer 1.

[0064] S2 is made by weaving a blend of cotton and viscose fiber into a fabric to obtain a breathable layer 4;

[0065] S3 mixes nano-silver and polyvinyl alcohol to prepare an electrospinning solution; wherein the electrospinning solution comprises the following components by weight: 3 parts nano-silver, 9 parts polyvinyl alcohol, 8 parts formic acid, 15 parts acetic acid, 15 parts glue and 440 parts water.

[0066] S4 The electrospinning solution is sprayed onto the surface of the breathable layer 4 using electrospinning technology and then cured to obtain the second wear-resistant and antibacterial layer 3; the electrospinning parameters are: spinning speed 1 mL / h, spinning distance 15 cm, and spinning voltage 30 kV.

[0067] S5 applies glue to the surface of the second abrasion-resistant and antibacterial layer 3, and then attaches it to the first abrasion-resistant and antibacterial layer 1 through the adhesive layer 2 to obtain the highly abrasion-resistant and antibacterial denim fabric.

[0068] Example 3

[0069] A highly durable and antibacterial denim fabric, such as Figure 1 As shown, the structure includes a first wear-resistant and antibacterial layer 1, an adhesive layer 2, a second wear-resistant and antibacterial layer 3, and a breathable layer 4, arranged sequentially. The first wear-resistant and antibacterial layer 1 is woven from a cover yarn of cuprous oxide-reduction graphene polyester and spandex (4tex / 10F). The cover yarn has spandex as the core yarn and cuprous oxide-reduction graphene polyester as the outer fiber. The second wear-resistant and antibacterial layer 3 is a composite layer of nano-silver and polyvinyl alcohol. The breathable layer 4 is woven from a blend of cotton (40tex) and viscose fiber (40tex). The linear density of the cover yarn is 40tex. The mass ratio of cotton to viscose fiber is 60:40.

[0070] The preparation method of the cuprous oxide-redox graphene polyester includes the following steps:

[0071] (1) Polyester and dopamine solution are mixed at pH=13 and in-situ polymerization is carried out to obtain polydopamine-polyester after the reaction; the mass concentration of the dopamine solution is 0.5g / L.

[0072] (2) The polydopamine-polyester is immersed in the graphene oxide dispersion, taken out and dried to obtain graphene oxide-polydopamine-polyester; the mass concentration of the graphene oxide dispersion is 3g / L.

[0073] (3) Immerse graphene oxide-polydopamine-polyester in copper sulfate solution, then add alkali solution and reducing agent dropwise, remove and dry to obtain cuprous oxide-redox graphene polyester. The molar concentration of the copper sulfate solution is 0.01 mol / L. The molar concentration of the alkali solution is 2 mol / L, and the reducing agent is pyrrole solution with a molar concentration of 2 mol / L.

[0074] The method for preparing the highly abrasion-resistant and antibacterial denim fabric includes the following steps:

[0075] S1 uses spandex as the core yarn and cuprous oxide-reduction graphene polyester as the outer fiber to make a covering yarn, which is then woven into a fabric to obtain the first wear-resistant and antibacterial layer 1.

[0076] S2 is made by weaving a blend of cotton and viscose fiber into a fabric to obtain a breathable layer 4;

[0077] S3 mixes nano-silver and polyvinyl alcohol to prepare an electrospinning solution; wherein the electrospinning solution comprises the following components by weight: 1 part nano-silver, 7 parts polyvinyl alcohol, 5 parts formic acid, 10 parts acetic acid, 10 parts glue and 260 parts water.

[0078] S4 The electrospinning solution is sprayed onto the surface of the breathable layer 4 using electrospinning technology and then cured to obtain the second wear-resistant and antibacterial layer 3; the electrospinning parameters are: spinning speed 0.2 mL / h, spinning distance 10 cm, and spinning voltage 20 kV.

[0079] S5 applies glue to the surface of the second abrasion-resistant and antibacterial layer 3, and then attaches it to the first abrasion-resistant and antibacterial layer 1 through the adhesive layer 2 to obtain the highly abrasion-resistant and antibacterial denim fabric.

[0080] Example 4

[0081] The difference between Example 4 and Example 1 is that the mass ratio of cotton to viscose fiber in the breathable layer 4 of Example 4 is 30:70.

[0082] Example 5

[0083] The difference between Example 5 and Example 1 is that the mass ratio of cotton to viscose fiber in the breathable layer 4 of Example 5 is 70:30.

[0084] Example 6

[0085] The difference between Example 6 and Example 1 is that the preparation method of cuprous oxide-redox graphene polyester in Example 6 does not include step (1), that is, the polyester does not undergo in-situ polymerization of dopamine.

[0086] Comparative Example 1

[0087] The difference between Comparative Example 1 and Example 1 is that the denim fabric of Comparative Example 1 does not have a first abrasion-resistant and antibacterial layer 1 and an adhesive layer 2.

[0088] Comparative Example 2

[0089] The difference between Comparative Example 2 and Example 1 is that the denim fabric of Comparative Example 2 does not have a second abrasion-resistant and antibacterial layer 3.

[0090] Comparative Example 3

[0091] The difference between Comparative Example 3 and Example 1 is that the denim fabric of Comparative Example 3 does not have a breathable layer 4.

[0092] Comparative Example 4

[0093] The difference between Comparative Example 4 and Example 1 is that the first wear-resistant and antibacterial layer 1 of Comparative Example 4 is woven from a blend of cuprous oxide-redox graphene polyester and spandex yarn.

[0094] Comparative Example 5

[0095] The difference between Comparative Example 5 and Example 1 is that the first wear-resistant and antibacterial layer 1 of Comparative Example 5 is woven from cuprous oxide polyester and spandex-coated yarn, that is, the polyester does not contain graphene oxide.

[0096] Comparative Example 6

[0097] The difference between Comparative Example 6 and Example 1 is that the first abrasion-resistant and antibacterial layer 1 of Comparative Example 6 is woven from polyester and spandex covered yarn.

[0098] Comparative Example 7

[0099] The difference between Comparative Example 7 and Example 1 is that the first wear-resistant and antibacterial layer 1 of Comparative Example 7 is covered with a core yarn of cuprous oxide-redox graphene polyester and an outer fiber of spandex.

[0100] Comparative Example 8

[0101] The difference between Comparative Example 8 and Example 1 is that no nano-silver is added to the second wear-resistant and antibacterial layer 3 of Comparative Example 8.

[0102] Comparative Example 9

[0103] The difference between Comparative Example 9 and Example 1 is that Comparative Example 9 does not have a second wear-resistant and antibacterial layer 3, and the breathable layer 4 is immersed in a nano silver solution with the same mass concentration as in Example 1.

[0104] Performance testing

[0105] 1. Antibacterial performance test

[0106] According to GB / T209443—2008 "Evaluation of antimicrobial properties of textiles - Part 3: Vibration method", the antimicrobial effects of denim fabrics in Examples 1-6 and Comparative Examples 1-9 were tested. The test bacteria were Candida albicans (ATCC10231) and Staphylococcus aureus (ATCC6538), respectively. Specific data are shown in Table 1.

[0107] Table 1. Antibacterial performance data of each group of samples

[0108]

[0109] As shown in Table 1, the denim fabric of Example 1 exhibits the best antibacterial properties. The antibacterial properties of Examples 2-4 are relatively similar. In Example 6, the cuprous oxide-reduction graphene polyester does not contain polydopamine, resulting in poor adhesion of cuprous oxide to the polyester and a significant reduction in antibacterial properties. In Comparative Example 4, the first abrasion-resistant antibacterial layer 1 is woven from a blend of cuprous oxide-reduction graphene polyester and spandex yarn, leading to a reduced contact area between the cuprous oxide-reduction graphene polyester and pathogens, thus lowering antibacterial properties. In Comparative Example 5, the first abrasion-resistant antibacterial layer 1 does not contain reduction graphene, and the cuprous oxide lacks a carrier, making it difficult to disperse evenly in the polyester, thus significantly reducing its antibacterial properties. In Comparative Example 6, the polyester in the first abrasion-resistant antibacterial layer 1 is unmodified, and its antibacterial properties are similar to those in Comparative Example 1 without the first abrasion-resistant antibacterial layer 1, indicating that the polyester modified with cuprous oxide and reduction graphene is key to improving the antibacterial properties of the fabric.

[0110] Comparative Example 2, which lacks a second wear-resistant and antibacterial layer 3, exhibits antibacterial properties similar to Comparative Example 8, indicating that the addition of nano-silver to the second wear-resistant and antibacterial layer 3 is a crucial factor in its antibacterial performance. Comparative Example 9, which omits the second wear-resistant and antibacterial layer 3 and instead directly immerses the breathable layer 4 in a nano-silver solution, also shows reduced antibacterial performance. This is because nano-silver is poorly dispersed on the cotton / viscose fiber composite. Electrospinning nano-silver together with polyvinyl alcohol promotes uniform adhesion of nano-silver to the breathable layer 4, thereby improving antibacterial properties.

[0111] 2. Moisture absorption and quick-drying performance test

[0112] The moisture absorption and quick-drying properties of the denim fabrics in Examples 1-6 and Comparative Examples 1-9 were tested according to GB / T21655.1-2008 "Evaluation of moisture absorption and quick-drying properties - Part 1: Single-item combination test method". Specific data are shown in Table 2.

[0113] Table 2. Moisture absorption and quick-drying performance data of each group of samples.

[0114] Group / Project Water absorption rate / % Water diffusion time / s Cubic suction height / mm <![CDATA[Evaporation rate / g·h -1 > <![CDATA[Water vapor permeability g / m 2 ·d]]> Example 1 219.0 2.3 119.5 0.33 12438.2 Example 2 218.9 2.3 99.8 0.28 12387.7 Example 3 214.4 2.6 113.7 0.31 12358.9 Example 4 184.5 2.8 95.4 0.33 12145.2 Example 5 197.7 2.8 92.4 0.33 12154.3 Example 6 201.3 2.6 98.1 0.29 12125.3 Comparative Example 1 212.5 2.4 115.1 0.32 12372.4 Comparative Example 2 214.1 2.5 114.9 0.32 12384.3 Comparative Example 3 145.7 3.0 84.5 0.20 11883.1 Comparative Example 4 215.8 2.3 117.8 0.32 12414.8 Comparative Example 5 213.0 2.4 117.5 0.31 12365.8 Comparative Example 6 218.6 2.3 116.7 0.34 12459.0 Comparative Example 7 196.1 2.9 101.2 0.30 12489.5 Comparative Example 8 209.8 2.7 100.0 0.29 12227.4 Comparative Example 9 220.2 2.2 118.9 0.33 12430.1

[0115] As shown in Table 2, compared with Examples 4 and 5, Example 1 exhibits significantly improved moisture absorption and quick-drying properties, indicating that a cotton to viscose fiber mass ratio of (40~60):(40~60) provides the best breathability for the fabric. In Example 6, the first abrasion-resistant antibacterial layer 1 lacks polydopamine, resulting in decreased adhesion and poor dispersion of cuprous oxide and reduced graphene oxide, thus affecting the fabric's breathability. In Comparative Examples 1 and 2, the lack of the first abrasion-resistant antibacterial layer 1 and the second abrasion-resistant antibacterial layer 3 does not significantly affect the breathability of the fabric, indicating that the first abrasion-resistant antibacterial layer 1 and the second abrasion-resistant antibacterial layer 3 have no significant impact on the fabric's moisture absorption.

[0116] In Comparative Example 3, the lack of breathable layer 4 significantly reduced its moisture absorption and breathability, indicating that breathable layer 4 is the main parameter affecting the breathability and moisture absorption performance of the fabric.

[0117] The moisture absorption properties of Comparative Examples 4-6 are not much different from those of Example 1, indicating that the type of yarn, whether it contains graphene oxide or reduced graphene oxide, and whether it contains cuprous oxide in the first wear-resistant and antibacterial layer 1 have little impact on the breathability of the fabric.

[0118] In Comparative Example 7, cuprous oxide-reduction graphene polyester was used as the core filament and spandex as the outer fiber. Its moisture absorption performance was significantly lower than that of Example 1. This is because spandex fabric has poor moisture absorption and slow moisture evaporation. Therefore, polyester was chosen as the outer fiber in Example 1. While improving abrasion resistance and antibacterial properties, polyester's moisture evaporates easily, thus exhibiting quick-drying characteristics.

[0119] The performance of Comparative Example 8 is similar to that of Example 1, indicating that the addition of nano-silver does not affect the moisture absorption and breathability of the fabric.

[0120] Comparative Example 9 involved directly immersing the breathable layer 4 in a nano-silver solution. Its moisture absorption and quick-drying properties were better than those of Example 1, but its other properties, such as abrasion resistance and antibacterial properties, were reduced.

[0121] 3. Mechanical performance testing

[0122] According to GB / T 3917.1—2009 "Textiles - Tear Properties of Fabrics", the tear strength of denim fabrics in Examples 1-6 and Comparative Examples 1-9 was tested using the impact pendulum method. The abrasion resistance of denim fabrics in Examples 1-6 and Comparative Examples 1-9 was tested according to GB / T 4802.2—2008 "Textiles - Determination of Pilling and Friction Properties - Part 2: Modified Martindale Method". Each sample was rated, and the rating table is shown in Table 3. Specific test data are shown in Table 4.

[0123] Table 3 Abrasion Resistance Rating Table

[0124] series Status Description 5 No change 4 Slight surface fuzzing and / or slight pilling 3 The surface exhibits moderate roughness and / or moderate pilling. Balls of varying sizes and densities cover portions of the sample surface. 2 The surface is noticeably roughened and / or pilled. Balls of varying sizes and densities cover portions of the sample surface. 1 The surface is severely roughened and / or pilled. Balls of varying sizes and densities cover portions of the sample surface.

[0125] Table 4 Mechanical strength data of each group of samples

[0126] Group / Project Meridional tear strength / N Weft tear strength / N Anti-pilling rating / grade Example 1 58.92 74.93 5 Example 2 57.19 72.74 5 Example 3 56.37 71.23 5 Example 4 56.41 73.58 5 Example 5 58.68 74.16 5 Example 6 54.56 69.13 5 Comparative Example 1 43.37 55.81 3 Comparative Example 2 43.15 54.03 3 Comparative Example 3 50.20 66.77 5 Comparative Example 4 55.56 70.13 5 Comparative Example 5 53.72 69.61 5 Comparative Example 6 51.69 67.64 3 Comparative Example 7 48.94 65.03 3 Comparative Example 8 58.41 73.85 5 Comparative Example 9 42.29 54.98 3

[0127] As shown in Table 4, Example 1 is the example with the best mechanical properties. In Example 6, the cuprous oxide-reduction graphene polyester does not contain polydopamine, resulting in poor adhesion of cuprous oxide and reduction graphene to the polyester, and its mechanical properties are also slightly reduced.

[0128] In Comparative Example 4, the first abrasion-resistant and antibacterial layer 1 was woven from a blend of cuprous oxide-reduction graphene polyester and spandex yarn. This resulted in a reduced contact area between the cuprous oxide-reduction graphene polyester and the friction surface, leading to a slight decrease in mechanical properties. In Comparative Example 5, the first abrasion-resistant and antibacterial layer 1 did not contain reduction graphene, and the lack of a carrier for cuprous oxide reduced its stability in polyester, thus slightly affecting mechanical properties. In Comparative Example 6, the polyester in the first abrasion-resistant and antibacterial layer 1 was unmodified, and its mechanical properties were similar to those in Example 1, indicating that modification of polyester can improve the mechanical properties of the fabric to a certain extent. In Comparative Example 7, the covering yarn of the first abrasion-resistant and antibacterial layer 1 used cuprous oxide-reduction graphene polyester as the core yarn and spandex as the outer fiber. Because spandex itself has better strength than polyester, and considering its antibacterial properties, it is preferable to use spandex as the core yarn to provide strength and cuprous oxide-reduction graphene polyester as the outer fiber to provide moisture absorption and antibacterial properties.

[0129] In Comparative Example 1, the absence of the first abrasion-resistant and antibacterial layer 1 significantly reduces its mechanical properties. This is because polyester and spandex inherently possess good strength and abrasion resistance. Similarly, in Comparative Examples 2 and 9, the absence of the second abrasion-resistant and antibacterial layer 3 also results in a significant decrease in mechanical properties. This is because polyvinyl alcohol has high strength and high modulus, and its addition to the fabric can improve the fabric's mechanical strength and durability.

[0130] In summary, the denim fabric of this invention provides a high level of wearing comfort. Therefore, when wearing this fabric, the body's sweat can be wicked away quickly, thus improving wearing comfort and preventing the growth of bacteria in sweat. Furthermore, it has good abrasion resistance, making it suitable for long-term wear, and is especially suitable for frontline workers and other workers in occupations with high labor intensity.

[0131] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A highly abrasion-resistant and antibacterial denim fabric, characterized in that, The device comprises, in sequence, a first wear-resistant and antibacterial layer, an adhesive layer, a second wear-resistant and antibacterial layer, and a breathable layer; wherein, the first wear-resistant and antibacterial layer is woven from a coated yarn of cuprous oxide-reduction graphene polyester and spandex; the coated yarn has spandex as the core yarn and cuprous oxide-reduction graphene polyester as the outer fiber; the second wear-resistant and antibacterial layer is a composite layer of nano-silver and polyvinyl alcohol; the breathable layer is woven from a blended yarn of cotton and viscose fiber; The preparation method of the cuprous oxide-redox graphene polyester includes the following steps: (1) Polyester and dopamine solution were mixed under alkaline conditions and in-situ polymerization was carried out to obtain polydopamine-polyester after the reaction; (2) Immerse the polydopamine-polyester in a graphene oxide dispersion, take it out and dry it to obtain graphene oxide-polydopamine-polyester; (3) Immerse graphene oxide-polydopamine-polyester in copper sulfate solution, then add alkaline solution and reducing agent, take it out and dry it to obtain cuprous oxide-redox graphene polyester; A method for preparing highly abrasion-resistant and antibacterial denim fabric includes the following steps: S1 uses spandex as the core yarn and cuprous oxide-reduction graphene polyester as the outer fiber to make a covering yarn, which is then woven into a fabric to obtain the first wear-resistant and antibacterial layer. S2 involves weaving a blend of cotton and viscose fiber into a fabric to obtain a breathable layer; wherein the mass ratio of cotton to viscose fiber is (40~60):(40~60). S3 mixes nano-silver and polyvinyl alcohol to prepare an electrospinning solution; S4 The electrospinning solution is sprayed onto the surface of the breathable layer using electrospinning technology and then cured to obtain the second wear-resistant and antibacterial layer. S5 applies glue to the surface of the second abrasion-resistant and antibacterial layer, and then bonds it to the first abrasion-resistant and antibacterial layer through an adhesive layer to obtain the highly abrasion-resistant and antibacterial denim fabric.

2. The highly abrasion-resistant and antibacterial denim fabric as described in claim 1, characterized in that, Includes at least one of (I) to (IV): (I) The mass concentration of the dopamine solution is 0.2~0.5 g / L; (II) The mass concentration of the graphene oxide dispersion is 1~3 g / L; (III) The molar concentration of the copper sulfate solution is 0.005~0.01 mol / L; (IV) The molar concentration of the alkaline solution is 1~2 mol / L, and the molar concentration of the reducing agent is 1~2 mol / L.

3. The highly abrasion-resistant and antibacterial denim fabric as described in claim 1, characterized in that, The linear density of the covering yarn is 20~40 tex, and the linear density of the spandex is 3~4 tex.

4. The highly abrasion-resistant and antibacterial denim fabric as described in claim 1, characterized in that, The linear density of the cotton is 20-40 tex, and the linear density of the viscose fiber is 20-30 tex.

5. The highly abrasion-resistant and antibacterial denim fabric as described in claim 1, characterized in that, The electrospinning solution comprises the following components by weight: 1-3 parts nano silver, 7-9 parts polyvinyl alcohol, 5-8 parts formic acid, 10-15 parts acetic acid, 10-15 parts glue, and 260-440 parts water.

6. The highly abrasion-resistant and antibacterial denim fabric as described in claim 1, characterized in that, In step S4 of the preparation method, the parameters for electrospinning are: spinning speed 0.2~1mL / h, spinning distance 10~15cm, and spinning voltage 20~30kV.

7. The use of the highly abrasion-resistant and antibacterial denim fabric according to any one of claims 1-6 in the preparation of denim garments.

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