Preparation process of all-cotton antibacterial and deodorant fabric and product of all-cotton antibacterial and deodorant fabric

Abstract

The invention relates to the technical field of textile products, in particular to a preparation process of an all-cotton antibacterial deodorizing fabric and a product thereof. The invention discloses a preparation process of an all-cotton antibacterial and deodorant fabric, which comprises the following steps: adding a spinning suspension containing an antibacterial and deodorant composition to a cotton web in a cotton carding stage by using an electrostatic spinning process to obtain a cotton web subjected to antibacterial and deodorant treatment; the cotton web subjected to antibacterial and deodorizing treatment is prepared into the antibacterial and deodorizing fabric through a spinning and weaving process. According to the preparation technology, the electrostatic spinning technology is combined with a traditional spinning technology, the washability of the textile is improved, the antibacterial and deodorizing effects are more lasting, meanwhile, the photocatalytic material, the tea polyphenol and the acidic substance are combined, and acidic and alkaline peculiar smells can be eliminated at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of textile products, and in particular to a preparation process of an all-cotton antibacterial and deodorizing fabric and a product thereof. Background Art

[0002] With the improvement of living standards, consumers have higher and higher requirements for the performance of textiles, especially in terms of antibacterial and deodorizing. Odor substances produced by bacteria during metabolism, such as trimethylamine, isovaleric acid, phenylacetic acid, ammonia, indole, acetic acid, 2-nonenal, etc., have brought inconvenience to people's daily lives. Therefore, the development of textiles with antibacterial and deodorizing functions has become a current research hotspot.

[0003] At present, most of the antibacterial (or antibacterial and deodorizing) textiles on the market are made by dipping or spraying finishing agents to attach antibacterial agents or deodorizing agents to cotton yarn or cotton fabric. However, this method has obvious defects. After a certain number of washings, the additives will be washed away, resulting in a weakened antibacterial and deodorizing effect, and a long-lasting and durable effect cannot be achieved. In addition, although antibacterial agents can inhibit bacterial growth and reduce the generation of odors, they cannot completely avoid the generation of odors and cannot eliminate the odors that have already been generated.

[0004] In order to improve this situation, some companies have tried to add deodorants during the chemical spinning process to improve the deodorizing durability of the fiber. However, most of the deodorants are located inside the fiber, making it difficult to fully exert their effects. In addition, chemical fibers are prone to allergies and static electricity, and are not suitable for many application products, such as maternal and child products.

[0005] In contrast, cotton fiber is widely used in maternal and child products and underwear due to its natural moisture absorption and breathability. However, unlike chemical fiber spinning, cotton fiber cannot be made functional by adding substances during the spinning process. Generally, fiber modification or antibacterial and deodorizing agents are added during the fabric finishing stage to achieve functionality. However, cotton fiber modification is difficult, with low yield and high cost; and the addition of auxiliaries during finishing does not provide sufficient washability.

[0006] In order to break through these technical bottlenecks, electrospinning technology has gradually come into people's view. Electrospinning micro-nano fibers are widely used because they belong to the micro-nano scale and have characteristics such as surface effect, small size effect, and quantum size effect. Micro-nanoscale fiber materials prepared by electrospinning technology have shown great potential in the fields of biomedicine, sensing and filtration. At the same time, this technology has also received increasing attention in the traditional textile field. Combining electrospinning technology with traditional spinning technology to make functional textiles has more advantages than traditional functional textiles.

[0007] Although electrospinning technology has shown great potential in the functionalization of textiles, there are still some problems in practical applications. First, how to efficiently add the antibacterial and deodorizing composition to the cotton net and achieve a firm bond with the cotton fiber is a technical challenge currently faced. Secondly, the existing antibacterial and deodorizing additives can often only eliminate a certain type of odor and cannot meet the needs of eliminating both acidic and alkaline odors at the same time. In addition, how to maintain the comfort and washability of the fabric while ensuring the antibacterial and deodorizing effect is also a problem that needs to be solved urgently.

[0008] In summary, there are still many technical problems in the preparation process of current antibacterial and deodorizing textiles. In order to overcome these defects, it is necessary to develop a new cotton antibacterial and deodorizing yarn preparation process and its products to achieve long-lasting durability and comprehensive coverage of antibacterial and deodorizing functions. Summary of the invention

[0009] The present application provides a preparation process of an all-cotton antibacterial and deodorizing fabric and its products. The preparation process includes adding an antibacterial and deodorizing composition to a cotton net through an electrostatic spinning device during the carding stage of traditional spinning, and then preparing the antibacterial and deodorizing textile through a subsequent spinning and weaving process. By combining the electrostatic spinning technology with the traditional spinning process, the washability of the textile is improved, and the antibacterial and deodorizing effect is made more lasting. At the same time, the combination of photocatalytic materials, tea polyphenols and acidic substances can eliminate acidic and alkaline odors at the same time.

[0010] The technical solution adopted by this application to solve its technical problem is:

[0011] In the first aspect, the present application provides a preparation process of an all-cotton antibacterial and deodorizing fabric, wherein a spinning suspension containing an antibacterial and deodorizing composition is added to a cotton net in the combing stage by an electrospinning process to obtain a cotton net treated with antibacterial and deodorizing treatment;

[0012] The cotton net treated with antibacterial and deodorizing treatment is prepared through spinning and weaving process to form antibacterial and deodorizing fabric;

[0013] The antibacterial and deodorizing composition comprises at least one of a photocatalytic nanomaterial, tea polyphenols, polyhexamethylene hydrochloride and an acidic substance;

[0014] The electrospinning process is controlled as follows: temperature is 20-28°C, humidity is 40%-80%, carding machine speed is 260-350r / min, vertical height of spinneret from cotton web is 15-30cm, spinning voltage is 50-70kV.

[0015] In one or more technical solutions, the antibacterial and deodorizing composition comprises the following raw materials in parts by weight:

[0016] 0.5-1.5 parts of photocatalytic material, 0.5-2 parts of tea polyphenols, 1-2 parts of polyhexamethylene hydrochloride, and 1-3 parts of acidic substance.

[0017] In one or more technical solutions, the photocatalytic nanomaterial includes at least one of nano ZnO, nano TiO2, and nano SiO2.

[0018] In one or more technical solutions, the tea polyphenols are nano-grade tea polyphenols.

[0019] In one or more technical solutions, the acidic substance includes at least one of alginic acid / sodium alginate, formic acid / sodium formate, acetic acid / sodium acetate, acetic acid / sodium acetate, and citric acid / sodium citrate.

[0020] In one or more technical solutions, the antibacterial and deodorizing composition further comprises 0.3-1.5 parts of β-cyclodextrin.

[0021] In one or more technical solutions, the spinning suspension comprises the following raw materials in weight content:

[0022] 8-12% polymer, 2-4% antibacterial and deodorizing composition, and the rest solvent;

[0023] The polymer is at least one of polyacrylonitrile PAN, polyvinyl alcohol PVA, cellulose acetate CA, and polyurethane PU;

[0024] The solvent is at least one of N,N-dimethylformamide, methanol, ethanol, acetone and deionized water.

[0025] In one or more technical solutions, the spinning and weaving process includes the following processes in sequence: cotton net treated with antibacterial and deodorizing treatment → raw sliver → drawing → roving → spun yarn → winding → finished yarn → weaving → pre-treatment → dyeing → acid treatment → shaping → pre-shrinking → finished product;

[0026] The acid back treatment is to use acid solution to treat the dyed fabric so that the pH value of the fabric reaches 4-5.

[0027] In a second aspect, the present application provides a product, including a fabric obtained by the preparation process described in the first aspect.

[0028] In one or more technical solutions, the products include baby clothes, baby diapers, underwear, underpants, bed sheets, quilt covers, and pillowcases.

[0029] The beneficial effects of this application are:

[0030] The preparation process described in this application uses electrostatic spinning technology to evenly distribute the antibacterial and deodorizing composition on cotton fibers to form a micro-nano fiber layer. These micro-nano fibers are closely combined with cotton fibers, which not only improves the durability of the antibacterial and deodorizing function, but also maintains the comfort and breathability of cotton fabrics; the comprehensive use of photocatalytic nanomaterials, tea polyphenols, acidic substances and PHMB achieves the comprehensive elimination of acidic and alkaline odors, effectively solving the problem that a single deodorizer cannot eliminate multiple odors at the same time. The antibacterial and deodorizing composition is fixed on cotton fibers by electrostatic spinning technology to form a micro-nano fiber layer, which greatly improves the washability of the antibacterial and deodorizing function. Even after multiple washings, the antibacterial and deodorizing effect is still significant.

[0031] The preparation process described in this application combines electrospinning technology with traditional spinning technology, which not only simplifies the process flow and improves production efficiency, but also avoids the use of chemical substances such as adhesives and cross-linking agents, reduces environmental pollution, and meets the requirements of environmental protection and sustainable development.

[0032] The fabric described in the present application, while retaining the natural moisture absorption, breathability and skin-friendliness of cotton fibers, achieves antibacterial and deodorizing functions, so that the final product has excellent comfort and functionality, and is suitable for a variety of application scenarios such as underwear, socks, bedding, etc. It is also particularly suitable for use in sensitive areas such as maternal and child products and underwear, meeting the needs of different users. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0034] Figure 1 Schematic diagram of the electrospinning process described in Preparation Example 1;

[0035] Figure 2 This is an electron microscope scanning image of the antibacterial and deodorizing composition described in Preparation Example 1 on a cotton net;

[0036] Figure 3 This is an electron microscope scanning image of the yarn treated with the antibacterial and deodorizing composition described in Preparation Example 1;

[0037] Figure 4 This is a graph summarizing the performance test results of Examples 1-5 and Comparative Examples 1-10 described in this application. DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0039] In this application, the term "and / or" describes the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0040] In the present application, "at least one" means one or more, and "plurality" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, "at least one of a, b, or c", or "at least one of a, b, and c" can all represent: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, and c can be single or multiple, respectively.

[0041] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution, some or all of the steps can be executed in parallel or sequentially, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0042] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0043] The weight of the relevant components mentioned in the embodiment description of the present application can not only refer to the specific content of each component, but also represent the proportional relationship between the weights of the components. Therefore, as long as the content of the relevant components is proportionally enlarged or reduced according to the embodiment description of the present application, it is within the scope disclosed in the embodiment description of the present application. Specifically, the mass described in the embodiment description of the present application can be a mass unit known in the chemical industry such as μg, mg, g, kg, etc.

[0044] The terms "first" and "second" are used only for descriptive purposes to distinguish objects such as substances from each other, and should not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. For example, without departing from the scope of the embodiments of the present application, the first XX may also be referred to as the second XX, and similarly, the second XX may also be referred to as the first XX. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0045] The present inventors have discovered that:

[0046] 1. After repeated washing, the additives of traditional antibacterial and deodorizing textiles are easily washed away, resulting in a weakened effect; most existing antibacterial and deodorizing textiles only add antibacterial agents, which can inhibit the growth of bacteria and reduce the generation of odors, but cannot completely eliminate existing odors.

[0047] 2. Although chemical fibers can improve their deodorizing durability by adding deodorants during the spinning process, they are prone to allergies and static electricity, limiting their application in sensitive areas. The traditional method of adding antibacterial deodorants during cotton fiber modification or finishing has problems such as difficulty in modification, low yield, and high cost.

[0048] 3. When a single additive is used alone, there are obvious defects

[0049] Nano-TiO2, ZnO and other photocatalytic materials produce free hydroxyl radicals and active oxygen under light, which have strong oxidizing properties and can decompose organic matter and kill bacteria, thus achieving antibacterial and deodorizing functions. However, these materials are less effective under lightless conditions.

[0050] Tea polyphenols have strong redox properties and can remove odor molecules through oxidative decomposition, reduction and adsorption mechanisms, and also have antibacterial properties. However, when used alone, they are not very effective in removing alkaline odors such as ammonia.

[0051] Acidic substances such as alginic acid / sodium alginate and formic acid / sodium formate HCOONa can neutralize alkaline odors (such as ammonia) and effectively eliminate these odors. However, their effect will weaken after washing.

[0052] Polyhexamethyleneguanidine hydrochloride (PHMB) is a broad-spectrum antibacterial agent that can form a layer of cations on the surface of objects, which can inhibit bacteria for a long time and prevent bacterial growth, thereby reducing the generation of odor.

[0053] In order to solve the above-mentioned technical problems, the present application provides a preparation process of an all-cotton antibacterial and deodorizing fabric.

[0054] Preparation Example 1, a preparation process of a cotton antibacterial and deodorizing fabric, the specific production process is as follows:

[0055] S1. Antibacterial deodorizing composition

[0056] Photocatalytic nanomaterial: any one or any combination of nano ZnO, nano TiO2, and nano SiO2, 0.5-1.5 parts, with a particle size between 20-400 nm, preferably 30 nm in the embodiment.

[0057] Tea polyphenols: nanometer level, 0.5-2 parts, particle size between 200-800nm, preferably 300nm in the embodiment.

[0058] Polyhexamethyleneguanidine hydrochloride (PHMB): 1-2 parts.

[0059] Acidic substance: any one or any combination of alginic acid / sodium alginate, formic acid / sodium formate, acetic acid / sodium acetate, acetic acid / sodium acetate, citric acid / sodium citrate, 1-3 parts.

[0060] Specifically, alginic acid / sodium alginate are mixed at a weight ratio of 1:1, formic acid / sodium formate are mixed at a weight ratio of 1:1, acetic acid / sodium acetate are mixed at a weight ratio of 1:1, acetic acid / sodium acetate are mixed at a weight ratio of 1:1, and citric acid / sodium citrate are mixed at a weight ratio of 1:1.

[0061] β-cyclodextrin (stabilizer): 0.3-1.5 parts.

[0062] Prepare corresponding raw materials according to weight parts, mix them thoroughly, and obtain an antibacterial and deodorizing composition.

[0063] S2. Preparation of spinning suspension

[0064] Polymer: any one or more of polyacrylonitrile PAN (Mw = 75,000 g / mol), polyvinyl alcohol (Mw = 12,0000 g / mol), PVA, cellulose acetate CA (Mw = 5,0000 g / mol), polyurethane PU (Mw = 25,0000 g / mol), accounting for 8-12% by weight;

[0065] Antibacterial and deodorizing composition, 2-4% by weight;

[0066] Solvent: any one of N,N-dimethylformamide, methanol, ethanol, acetone, and deionized water, and the balance.

[0067] The polymer is dissolved in a solvent, and then the antibacterial and deodorizing composition is added, and then dispersed by ultrasound to form a uniform spinning suspension.

[0068] S3. Electrospinning process

[0069] like Figure 1 As shown, the spinning suspension containing the antibacterial and deodorizing composition is added to the cotton net in the carding stage by using the electrospinning process;

[0070] Temperature: 20-28℃

[0071] Humidity: 40%-80%

[0072] Carding machine speed: 260-350r / min

[0073] Vertical height between spinneret and cotton mesh: 15-30cm

[0074] Spinning voltage: 50-70kV;

[0075] An electrospinning device is installed on a traditional carding machine, and the cotton web output by the carding machine is used as a receiving substrate. The antibacterial and deodorizing composition is evenly added to the cotton web through an electrospinning process to form an integrated cotton web / functional micro-nano fiber composite material. Figure 2 The cotton net treated with antibacterial and deodorizing treatment is treated according to the following process to prepare a finished fabric:

[0076] Cotton net with antibacterial and deodorizing treatment → raw sliver → drawing → roving → spun yarn → winding → finished yarn → weaving → pre-treatment → dyeing → acid recovery treatment → shaping → pre-shrinkage → finished product.

[0077] S4. Spinning and weaving process

[0078] Sliver: The cotton net treated with antibacterial and deodorizing treatment is subjected to the sliver making process.

[0079] Drawing: Drawing the raw slivers to improve the uniformity of the yarn.

[0080] Roving: The slivers after drawing are subjected to the roving process.

[0081] Fine yarn: The coarse yarn is further refined to form fine yarn.

[0082] Winding: Winding the yarn into bobbins for subsequent processing.

[0083] Finished yarn: prepared as Figure 3 The specific indicators of the antibacterial and deodorizing cotton yarn shown are as follows:

[0084] Linear density: 14.7tex

[0085] Linear density deviation rate: -0.68%

[0086] Single yarn breaking strength: 270cN

[0087] Coefficient of variation of breaking strength (CV): 6.3%

[0088] Breaking strength: 18.1cN / tex

[0089] Strip uniformity: 10.73%

[0090] Details - 50%: 0

[0091] Thick place +50%: 2

[0092] Neps +200%: 11

[0093] Twist: 864 twists / m

[0094] Twist coefficient of variation (CV): 2.0%

[0095] Twist factor: 105

[0096] Hairiness index H value: 6.03

[0097] Hairiness index: 34.40 (roots / m);

[0098] S5. Fabric weaving

[0099] Weaving technology: Use knitting or weaving air-jet looms to make functional fabrics.

[0100] S6. Pre-treatment process

[0101] Scouring and bleaching process: Use a mild scouring and bleaching process, the specific parameters are as follows:

[0102] Soda ash (sodium carbonate): 30-50g / L

[0103] Hydrogen peroxide: 10-15g / L

[0104] Cold batch scouring agent TF-125LA: 10-15g / L

[0105] Penetrant ERKANTOL NR: 1-2g / L

[0106] Biological desizing enzyme RG-SM001: 10-20g / L;

[0107] Stacking time at room temperature: 24 hours;

[0108] Desizing rate: more than 80%.

[0109] Mercerizing process: light mercerizing process is adopted, the specific parameters are as follows:

[0110] Caustic soda (sodium hydroxide) concentration: 12-20g / L

[0111] Speed: 60-70m / min

[0112] Temperature: 15-25℃

[0113] Rolling rate: 65%-75%.

[0114] S7. Staining

[0115] Dyeing process: conventional dyeing process to ensure the cleanliness and permeability of the cloth.

[0116] S8. Acid recovery treatment

[0117] Acid recovery treatment process: The specific parameters are as follows:

[0118] pH value of water in the tank after fabric color fixing and cleaning: 10-10.5

[0119] After adding acetic acid / citric acid, measure the pH value: 4-5

[0120] Bath ratio: 1:5

[0121] Immersion stirring operation time: 10-15 minutes;

[0122] Final finished fabric surface pH: weakly acidic.

[0123] 9. Shaping and pre-shrinking

[0124] Molding process: conventional molding process to ensure the stability of fabric size.

[0125] Pre-shrinkage process: conventional pre-shrinkage process to reduce fabric shrinkage.

[0126] 10. Finished product

[0127] After pre-shrinkage is qualified, the finished fabric is obtained.

[0128] Example 1

[0129] A preparation process of an all-cotton antibacterial and deodorizing fabric, wherein the spinning suspension used comprises the following raw materials by weight:

[0130] High polymer (polyacrylonitrile PAN) 8%, antibacterial and deodorizing composition 2%, N,N-dimethylformamide balance;

[0131] The antibacterial and deodorizing composition comprises the following raw materials in parts by weight:

[0132] 0.5 parts of photocatalytic material (nano ZnO), 0.5 parts of nano-grade tea polyphenols, 1 part of polyhexamethylene hydrochloride, 1 part of acidic substance (alginic acid / sodium alginate), and 0.3 parts of β-cyclodextrin;

[0133] The spinning suspension containing the antibacterial and deodorizing composition is added to the cotton net in the carding stage by using the electrostatic spinning process;

[0134] Temperature: 20℃

[0135] Humidity: 40%

[0136] Carding machine speed: 260r / min

[0137] Vertical height between spinneret and cotton mesh: 15cm

[0138] Spinning voltage: 50kV;

[0139] Other processes and control conditions were carried out according to Preparation Example 1.

[0140] Example 2

[0141] A preparation process of an all-cotton antibacterial and deodorizing fabric, wherein the spinning suspension used comprises the following raw materials by weight:

[0142] High polymer (polyvinyl alcohol PVA) 12%, antibacterial deodorizing composition 4%, N,N-dimethylformamide balance;

[0143] The antibacterial and deodorizing composition comprises the following raw materials in parts by weight:

[0144] 1.5 parts of photocatalytic material (nano-TiO2), 2 parts of nano-grade tea polyphenols, 2 parts of polyhexamethylene hydrochloride, 3 parts of acidic substance (formic acid / sodium formate), 1.5 parts of β-cyclodextrin;

[0145] The spinning suspension containing the antibacterial and deodorizing composition is added to the cotton net in the carding stage by using the electrostatic spinning process;

[0146] Temperature: 28℃

[0147] Humidity: 80%

[0148] Carding machine speed: 350r / min

[0149] Vertical height between spinneret and cotton mesh: 30cm

[0150] Spinning voltage: 70kV;

[0151] Other processes and control conditions were carried out according to Preparation Example 1.

[0152] Example 3

[0153] A preparation process of an all-cotton antibacterial and deodorizing fabric, wherein the spinning suspension used comprises the following raw materials by weight:

[0154] High polymer (cellulose acetate CA) 10%, antibacterial deodorizing composition 3%, methanol balance;

[0155] The antibacterial and deodorizing composition comprises the following raw materials in parts by weight:

[0156] 1 part of photocatalytic material (nano-SiO2), 1 part of nano-grade tea polyphenols, 1.5 parts of polyhexamethylene hydrochloride, 2 parts of acidic substance (acetic acid / sodium acetate), 1 part of β-cyclodextrin;

[0157] The spinning suspension containing the antibacterial and deodorizing composition is added to the cotton net in the carding stage by using the electrostatic spinning process;

[0158] Temperature: 25℃

[0159] Humidity: 60%

[0160] Carding machine speed: 300r / min

[0161] Vertical height between spinneret and cotton mesh: 25cm

[0162] Spinning voltage: 60kV;

[0163] Other processes and control conditions were carried out according to Preparation Example 1.

[0164] Example 4

[0165] A preparation process of an all-cotton antibacterial and deodorizing fabric, wherein the spinning suspension used comprises the following raw materials by weight:

[0166] High polymer (polyacrylonitrile PAN) 8%, antibacterial and deodorizing composition 4%, N,N-dimethylformamide balance;

[0167] The antibacterial and deodorizing composition comprises the following raw materials in parts by weight:

[0168] 0.5 parts of photocatalytic material (nano ZnO), 2 parts of nano-grade tea polyphenols, 1 part of polyhexamethylene hydrochloride, 1 part of acidic substance (acetic acid / sodium acetate), 1.5 parts of β-cyclodextrin;

[0169] The spinning suspension containing the antibacterial and deodorizing composition is added to the cotton net in the carding stage by using the electrostatic spinning process;

[0170] Temperature: 25℃

[0171] Humidity: 40%

[0172] Carding machine speed: 260r / min

[0173] Vertical height between spinneret and cotton mesh: 15cm

[0174] Spinning voltage: 50kV;

[0175] Other processes and control conditions were carried out according to Preparation Example 1.

[0176] Example 5

[0177] A preparation process of an all-cotton antibacterial and deodorizing fabric, wherein the spinning suspension used comprises the following raw materials by weight:

[0178] High polymer (polyurethane PU) 10%, antibacterial and deodorizing composition 2%, N,N-dimethylformamide balance;

[0179] The antibacterial and deodorizing composition comprises the following raw materials in parts by weight:

[0180] 1.5 parts of photocatalytic material (nano-TiO2), 2 parts of nano-grade tea polyphenols, 1 part of polyhexamethylene hydrochloride, 1 part of acidic substance (citric acid / sodium citrate), 1 part of β-cyclodextrin;

[0181] The spinning suspension containing the antibacterial and deodorizing composition is added to the cotton net in the carding stage by using the electrostatic spinning process;

[0182] Temperature: 25℃

[0183] Humidity: 40%

[0184] Carding machine speed: 260r / min

[0185] Vertical height between spinneret and cotton mesh: 15cm

[0186] Spinning voltage: 50kV;

[0187] Other processes and control conditions were carried out according to Preparation Example 1.

[0188] Comparative Example 1

[0189] A preparation process of an all-cotton antibacterial and deodorizing fabric, wherein the spinning suspension used comprises the following raw materials by weight:

[0190] Polymer (polyacrylonitrile PAN) 8%, N,N-dimethylformamide balance;

[0191] The spinning suspension is added to the cotton web in the carding stage by using the electrospinning process;

[0192] Temperature: 20℃

[0193] Humidity: 40%

[0194] Carding machine speed: 260r / min

[0195] Vertical height between spinneret and cotton mesh: 15cm

[0196] Spinning voltage: 50kV;

[0197] Other processes and control conditions were carried out according to Preparation Example 1.

[0198] Comparative Example 2

[0199] A preparation process of an all-cotton antibacterial and deodorizing fabric, wherein the spinning suspension used comprises the following raw materials by weight:

[0200] High polymer (polyacrylonitrile PAN) 8%, antibacterial and deodorizing composition 2%, N,N-dimethylformamide balance;

[0201] The antibacterial and deodorizing composition comprises the following raw materials in parts by weight:

[0202] 0.5 parts of nano-grade tea polyphenols, 1 part of polyhexamethylene hydrochloride, 1 part of acidic substance (alginic acid / sodium alginate), 0.3 parts of β-cyclodextrin;

[0203] The spinning suspension containing the antibacterial and deodorizing composition is added to the cotton net in the carding stage by using the electrostatic spinning process;

[0204] Temperature: 20℃

[0205] Humidity: 40%

[0206] Carding machine speed: 260r / min

[0207] Vertical height between spinneret and cotton mesh: 15cm

[0208] Spinning voltage: 50kV;

[0209] Other processes and control conditions were carried out according to Preparation Example 1.

[0210] Comparative Example 3

[0211] A preparation process of an all-cotton antibacterial and deodorizing fabric, wherein the spinning suspension used comprises the following raw materials by weight:

[0212] High polymer (polyacrylonitrile PAN) 8%, antibacterial and deodorizing composition 2%, N,N-dimethylformamide balance;

[0213] The antibacterial and deodorizing composition comprises the following raw materials in parts by weight:

[0214] 0.5 parts of photocatalytic material (nano ZnO), 1 part of polyhexamethylene hydrochloride, 1 part of acidic substance (alginic acid / sodium alginate), 0.3 parts of β-cyclodextrin;

[0215] The spinning suspension containing the antibacterial and deodorizing composition is added to the cotton net in the carding stage by using the electrostatic spinning process;

[0216] Temperature: 20℃

[0217] Humidity: 40%

[0218] Carding machine speed: 260r / min

[0219] Vertical height between spinneret and cotton mesh: 15cm

[0220] Spinning voltage: 50kV;

[0221] Other processes and control conditions were carried out according to Preparation Example 1.

[0222] Comparative Example 4

[0223] A preparation process of an all-cotton antibacterial and deodorizing fabric, wherein the spinning suspension used comprises the following raw materials by weight:

[0224] High polymer (polyacrylonitrile PAN) 8%, antibacterial and deodorizing composition 2%, N,N-dimethylformamide balance;

[0225] The antibacterial and deodorizing composition comprises the following raw materials in parts by weight:

[0226] 0.5 parts of photocatalytic material (nano ZnO), 0.5 parts of nano-grade tea polyphenols, 1 part of acidic substance (alginic acid / sodium alginate), and 0.3 parts of β-cyclodextrin;

[0227] The spinning suspension containing the antibacterial and deodorizing composition is added to the cotton net in the carding stage by using the electrostatic spinning process;

[0228] Temperature: 20℃

[0229] Humidity: 40%

[0230] Carding machine speed: 260r / min

[0231] Vertical height between spinneret and cotton mesh: 15cm

[0232] Spinning voltage: 50kV;

[0233] Other processes and control conditions were carried out according to Preparation Example 1.

[0234] Comparative Example 5

[0235] A preparation process of an all-cotton antibacterial and deodorizing fabric, wherein the spinning suspension used comprises the following raw materials by weight:

[0236] High polymer (polyacrylonitrile PAN) 8%, antibacterial and deodorizing composition 2%, N,N-dimethylformamide balance;

[0237] The antibacterial and deodorizing composition comprises the following raw materials in parts by weight:

[0238] 0.5 parts of photocatalytic material (nano ZnO), 0.5 parts of nano-grade tea polyphenols, 1 part of polyhexamethylene hydrochloride, and 0.3 parts of β-cyclodextrin;

[0239] The spinning suspension containing the antibacterial and deodorizing composition is added to the cotton net in the carding stage by using the electrostatic spinning process;

[0240] Temperature: 20℃

[0241] Humidity: 40%

[0242] Carding machine speed: 260r / min

[0243] Vertical height between spinneret and cotton mesh: 15cm

[0244] Spinning voltage: 50kV;

[0245] Other processes and control conditions were carried out according to Preparation Example 1.

[0246] Comparative Example 6

[0247] A preparation process of an all-cotton antibacterial and deodorizing fabric, wherein the spinning suspension used comprises the following raw materials by weight:

[0248] High polymer (polyacrylonitrile PAN) 8%, antibacterial and deodorizing composition 2%, N,N-dimethylformamide balance;

[0249] The antibacterial and deodorizing composition comprises the following raw materials in parts by weight:

[0250] 0.5 parts of photocatalytic material (nano ZnO), 0.5 parts of nano-grade tea polyphenols, 1 part of polyhexamethylene hydrochloride, 1 part of acidic substance (alginate / sodium alginate);

[0251] The spinning suspension containing the antibacterial and deodorizing composition is added to the cotton net in the carding stage by using the electrostatic spinning process;

[0252] Temperature: 20℃

[0253] Humidity: 40%

[0254] Carding machine speed: 260r / min

[0255] Vertical height between spinneret and cotton mesh: 15cm

[0256] Spinning voltage: 50kV;

[0257] Other processes and control conditions were carried out according to Preparation Example 1.

[0258] Comparative Example 7

[0259] A preparation process of an all-cotton antibacterial and deodorizing fabric, wherein the spinning suspension used comprises the following raw materials by weight:

[0260] High polymer (polyacrylonitrile PAN) 8%, antibacterial and deodorizing composition 2%, N,N-dimethylformamide balance;

[0261] The antibacterial and deodorizing composition comprises the following raw materials in parts by weight:

[0262] 0.5 parts of photocatalytic material (nano ZnO), 0.5 parts of nano-grade tea polyphenols, 1 part of polyhexamethylene hydrochloride, 1 part of acidic substance (alginic acid / sodium alginate), and 0.3 parts of β-cyclodextrin;

[0263] The spinning suspension containing the antibacterial and deodorizing composition is added to the cotton web in the carding stage by impregnation treatment;

[0264] Other processes and control conditions were carried out according to Preparation Example 1.

[0265] Comparative Example 8

[0266] A preparation process of an all-cotton antibacterial and deodorizing fabric, wherein the spinning suspension used comprises the following raw materials by weight:

[0267] High polymer (polyacrylonitrile PAN) 8%, antibacterial and deodorizing composition 2%, N,N-dimethylformamide balance;

[0268] The antibacterial and deodorizing composition comprises the following raw materials in parts by weight:

[0269] 0.5 parts of photocatalytic material (nano ZnO), 0.5 parts of nano-grade tea polyphenols, 1 part of polyhexamethylene hydrochloride, 1 part of acidic substance (alginic acid / sodium alginate), and 0.3 parts of β-cyclodextrin;

[0270] The spinning suspension containing the antibacterial and deodorizing composition is added to the cotton web in the carding stage by spraying;

[0271] Other processes and control conditions were carried out according to Preparation Example 1.

[0272] Comparative Example 9

[0273] A preparation process of an all-cotton antibacterial and deodorizing fabric, wherein the spinning suspension used comprises the following raw materials by weight:

[0274] High polymer (polyacrylonitrile PAN) 8%, antibacterial and deodorizing composition 2%, N,N-dimethylformamide balance;

[0275] The antibacterial and deodorizing composition comprises the following raw materials in parts by weight:

[0276] 0.5 parts of photocatalytic material (nano ZnO), 0.5 parts of nano-grade tea polyphenols, 1 part of polyhexamethylene hydrochloride, 1 part of acidic substance (alginic acid / sodium alginate), and 0.3 parts of β-cyclodextrin;

[0277] The spinning suspension containing the antibacterial and deodorizing composition is added to the cotton net in the carding stage by using the electrostatic spinning process;

[0278] Temperature: 20℃

[0279] Humidity: 40%

[0280] Carding machine speed: 100r / min

[0281] Vertical height between spinneret and cotton mesh: 15cm

[0282] Spinning voltage: 20 kV;

[0283] Other processes and control conditions were carried out according to Preparation Example 1.

[0284] Comparative Example 10

[0285] A preparation process of an all-cotton antibacterial and deodorizing fabric, wherein the spinning suspension used comprises the following raw materials by weight:

[0286] High polymer (polyacrylonitrile PAN) 8%, antibacterial and deodorizing composition 2%, N,N-dimethylformamide balance;

[0287] The antibacterial and deodorizing composition comprises the following raw materials in parts by weight:

[0288] 0.5 parts of photocatalytic material (nano ZnO), 0.5 parts of nano-grade tea polyphenols, 1 part of polyhexamethylene hydrochloride, 1 part of acidic substance (alginic acid / sodium alginate), and 0.3 parts of β-cyclodextrin;

[0289] The spinning suspension containing the antibacterial and deodorizing composition is added to the cotton net in the carding stage by using the electrostatic spinning process;

[0290] Temperature: 20℃

[0291] Humidity: 40%

[0292] Carding machine speed: 260r / min

[0293] Vertical height between spinneret and cotton mesh: 15cm

[0294] Spinning voltage: 50kV;

[0295] After dyeing, no acid treatment is performed;

[0296] Other processes and control conditions were carried out according to Preparation Example 1.

[0297] According to the following test requirements, the fabrics prepared in Examples 1-5 and Comparative Examples 1-10 were tested, and the relevant test results are summarized in Figure 4 middle;

[0298] 1. Antibacterial performance testing

[0299] Test items: antibacterial performance

[0300] Detection method:

[0301] Standard: GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles Part 3: Oscillation method"

[0302] Test bacteria: Staphylococcus aureus, Escherichia coli

[0303] Testing steps:

[0304] Cut the fabric to be tested into samples of appropriate size;

[0305] Place the sample in a culture medium containing the test bacteria and shake it for a certain period of time;

[0306] Remove the sample, rinse it with sterile saline, dilute it and spread it on the agar plate;

[0307] After culturing for a certain period of time, the number of colonies was counted and the antibacterial rate was calculated.

[0308] 2. Odor performance test

[0309] Test item: Deodorization performance

[0310] Detection method:

[0311] Standard: GBT 33610.2-2017 Determination of deodorizing properties of textiles Part 2: Inspection tube method;

[0312] GBT 33610.3-2019 Determination of deodorizing properties of textiles Part 3: Gas chromatography;

[0313] Test odor: ammonia, acetic acid, isovaleric acid, 2-nonenal; specific requirements are: ammonia (≥70%); acetic acid (≥70%); isovaleric acid (≥85%); 2-nonenal (≥75%),

[0314] Testing steps:

[0315] The determination of deodorizing performance includes the use of a detection tube method and a gas chromatography method.

[0316] The detection tube method uses a detection tube filled with a color developer to determine the ability of textiles to eliminate specific odorous gases. The sample is placed in a closed container containing the target odorous gas, and the concentration change of the odorous gas is monitored through the detection tube. The deodorization efficiency of the textile for the target odorous gas is calculated based on the reading displayed by the detection tube.

[0317] The gas chromatography method is to cut the fabric to be tested into samples of appropriate size;

[0318] Place the sample in a sealed container containing the test odor and leave it for a certain period of time;

[0319] Use gas chromatography or other appropriate methods to detect the odor concentration in the container and calculate the deodorization rate.

[0320] 3. Washability test

[0321] Test item: washability

[0322] Detection method:

[0323] Standard: AATCC Test Method 61-2019 "Effects of Home and Commercial Washing and Drying on Color Fastness of Textiles"

[0324] Testing steps:

[0325] Cut the fabric to be tested into samples of appropriate size.

[0326] Wash several times (e.g., 30 times) according to a standard washing procedure;

[0327] After each wash, the fabrics are tested for their antibacterial and deodorizing properties.

[0328] 4. Physical performance testing

[0329] Test items: physical properties

[0330] Detection method:

[0331] Standard: GB / T 3923.1-2013 "Tensile properties of textile fabrics - Part 1: Determination of breaking strength and elongation at break (strip method)"

[0332] Test items: breaking strength, breaking elongation, strip uniformity;

[0333] Testing steps:

[0334] Cut the fabric to be tested into standard specimens;

[0335] Use a tensile testing machine to determine the breaking strength and breaking elongation;

[0336] Calculate physical performance indicators such as strip uniformity.

[0337] 5. pH value detection

[0338] Test item: pH value

[0339] Detection method:

[0340] Standard: GB / T 7573-2002 "Determination of pH value of aqueous extract of textiles"

[0341] Testing steps:

[0342] Cut the fabric to be tested into samples of appropriate size;

[0343] Extract water-soluble substances in fabrics with distilled water;

[0344] Measure the pH of the extract using a pH meter.

[0345] 6. Color fastness test

[0346] Test items: Color fastness

[0347] Detection method:

[0348] Standard: GB / T 3921-2008 "Textiles - Tests for colour fastness - Colour fastness to washing with soap"

[0349] Testing steps:

[0350] Cut the fabric to be tested into samples of appropriate size;

[0351] Wash according to the standard washing process;

[0352] Evaluate the color fastness level after washing.

[0353] from Figure 4 It can be seen that:

[0354] In terms of antibacterial performance, the fabrics of Examples 1-5 still exhibit good antibacterial performance and a high antibacterial rate after multiple washings. This is because the antibacterial and deodorizing compositions in Examples 1-5 are very tightly combined with the cotton fibers during the electrospinning process, and the antibacterial components will not fall off easily even after multiple washings.

[0355] In terms of deodorization performance, the fabrics of Examples 1-5 can effectively eliminate a variety of odors (such as ammonia, acetic acid, and isovaleric acid) with a high deodorization rate. This is mainly attributed to the fact that the antibacterial deodorizing composition contains a variety of ingredients such as photocatalytic nanomaterials, nano-grade tea polyphenols, acidic substances, polyhexamethylene hydrochloride, and β-cyclodextrin, which can effectively adsorb and decompose odor molecules.

[0356] In terms of washability, the fabrics of Examples 1-5 still maintain good antibacterial and deodorizing properties after multiple washings, showing excellent washability. This is because the electrospinning technology evenly distributes the antibacterial and deodorizing composition on the cotton fibers, forming a stable micro-nano fiber layer, making the antibacterial and deodorizing components difficult to be washed away.

[0357] In terms of physical properties, the fabrics of Examples 1-5 have higher breaking strength and breaking elongation, and good strip uniformity, indicating that the fabrics have excellent physical properties. The electrospinning technology not only improves the functionality of the fabrics, but also maintains the original physical properties of the cotton fabrics, making them more durable.

[0358] In terms of pH value, after the acid recovery treatment, the pH value of the fabrics of Examples 1-5 is weakly acidic, which meets the acid-base balance requirements of human skin and is skin-friendly. This helps to reduce irritation to fabric users and improve wearing comfort.

[0359] In terms of color fastness, the fabrics of Examples 1-5 have a high color fastness grade after washing, and the color is well maintained, which means that the fabrics are not easy to fade during use and maintain their aesthetics.

[0360] Comparison between Example 1 and Comparative Examples 1-10 revealed that:

[0361] In Comparative Example 1, the antibacterial rate of the fabric of Comparative Example 1 after multiple washings is low. This is because no antibacterial deodorizing composition is added in Comparative Example 1, and only polymer (polyacrylonitrile PAN) and solvent (N,N-dimethylformamide) are used. Therefore, the fabric lacks effective antibacterial ingredients, resulting in poor antibacterial performance.

[0362] The deodorization rate of the fabric in Comparative Example 1 after multiple washings is also very low. This is also because the fabric cannot effectively absorb and decompose odor molecules without the addition of the antibacterial deodorizing composition, resulting in poor deodorizing performance. The antibacterial and deodorizing properties of the fabric in Comparative Example 1 significantly decreased after multiple washings. Due to the absence of the antibacterial and deodorizing composition, the fabric cannot maintain these functions during the washing process.

[0363] Therefore, since the fabric of Comparative Example 1 does not contain the antibacterial and deodorizing composition, its performance in terms of antibacterial performance, deodorizing performance, washing resistance, pH value and color fastness is not as good as that of Example 1. In Example 1, multiple antibacterial and deodorizing compositions are evenly distributed on cotton fibers through electrospinning technology, which not only improves the functionality of the fabric, but also maintains the physical properties of the cotton fabric, making it show significant advantages in many aspects.

[0364] In Comparative Example 2, nano-grade tea polyphenols, polyhexamethylene hydrochloride, acidic substances (alginic acid / sodium alginate) and β-cyclodextrin were used, but photocatalytic nanomaterials (such as nano ZnO) were lacking. Photocatalytic nanomaterials play an important role in improving antibacterial properties, so the antibacterial properties of Comparative Example 2 are relatively poor.

[0365] The deodorization rate of the fabric of Comparative Example 2 after multiple washings is also low, especially the deodorization rate of ammonia and isovaleric acid is significantly lower than that of Example 1. This is mainly because the photocatalytic nanomaterial is lacking in Comparative Example 2, and the photocatalytic nanomaterial also plays an important role in improving the deodorization performance. The fabric of Comparative Example 2 has poor retention of antibacterial and deodorization performance after multiple washings.

[0366] Therefore, due to the lack of photocatalytic nanomaterials (such as nano ZnO), the fabric of Comparative Example 2 is inferior to that of Example 1 in terms of antibacterial performance, deodorizing performance, washing resistance, pH value and color fastness. Visible light catalytic nanomaterials play a key role in improving antibacterial and deodorizing performance, so that the fabric of Example 1 can still maintain good antibacterial and deodorizing effects before and after multiple washings.

[0367] In Comparative Example 3, photocatalytic nanomaterials (nano ZnO), polyhexamethylene hydrochloride, acidic substances (alginic acid / sodium alginate) and β-cyclodextrin were used, but nano-grade tea polyphenols were lacking. Nano-grade tea polyphenols play an important role in improving antibacterial properties, so the antibacterial properties of Comparative Example 3 are relatively poor.

[0368] The deodorization rate of the fabric of Comparative Example 3 after multiple washings is also low. In particular, the deodorization rate of ammonia and isovaleric acid is significantly lower than that of Example 1. This is mainly because Comparative Example 3 lacks nano-grade tea polyphenols, which also play an important role in improving deodorization performance.

[0369] The fabric of Comparative Example 3 lacks nano-grade tea polyphenols, so its performance in antibacterial performance, deodorizing performance, washing resistance, pH value and color fastness is not as good as that of Example 1. Therefore, nano-grade tea polyphenols play a key role in improving the antibacterial and deodorizing performance, so that the fabric of Example 1 can still maintain good antibacterial and deodorizing effects before and after multiple washings.

[0370] In Comparative Example 4, photocatalytic nanomaterials (nano ZnO), nano-grade tea polyphenols, acidic substances (alginic acid / sodium alginate) and β-cyclodextrin were used, but polyhexamethylene hydrochloride was lacking. Polyhexamethylene hydrochloride plays an important role in improving antibacterial properties, so the antibacterial properties of Comparative Example 4 are relatively poor.

[0371] The deodorization rate of the fabric of Comparative Example 4 after multiple washings is also low, especially the deodorization rate of acetic acid and 2-nonenal is significantly lower than that of Example 1.

[0372] The fabric of Comparative Example 4 lacks polyhexamethylene hydrochloride, so its performance in antibacterial performance, deodorizing performance, washing resistance, pH value and color fastness is not as good as that of Example 1. Therefore, polyhexamethylene hydrochloride plays a key role in improving the antibacterial and deodorizing performance, so that the fabric of Example 1 can still maintain good antibacterial and deodorizing effects before and after multiple washings.

[0373] In Comparative Example 5, photocatalytic nanomaterials (nano ZnO), nano-grade tea polyphenols, polyhexamethylene hydrochloride and β-cyclodextrin were used, but acidic substances (alginate / sodium alginate) were lacking. Acidic substances play an important role in improving antibacterial properties, so the antibacterial properties of Comparative Example 5 are poor.

[0374] The deodorization rate of the fabric in Comparative Example 5 after multiple washings is also low, especially the deodorization rate of ammonia and isovaleric acid is significantly lower than that in Example 1. This is mainly because Comparative Example 5 lacks acidic substances, and acidic substances also play an important role in improving deodorization performance.

[0375] Therefore, the fabric of Comparative Example 5 is inferior to that of Example 1 in terms of antibacterial performance, deodorizing performance, washability, pH value and color fastness due to the lack of acidic substances (such as alginate / sodium alginate).

[0376] Comparative Example 6 is inferior to Example 1 in terms of antibacterial performance, deodorizing performance, washing resistance, pH value and color fastness due to the lack of β-cyclodextrin. β-cyclodextrin is a polysaccharide with a ring structure, which can form a protective film on the surface of cotton fibers, increase the binding force between antibacterial and deodorizing components and cotton fibers, which helps to improve the washing resistance of the fabric and make the antibacterial and deodorizing effect more durable. β-cyclodextrin also has good adsorption properties, can adsorb odor molecules, and improve the deodorizing effect. At the same time, it can also synergize with other antibacterial components to enhance the overall antibacterial performance.

[0377] Therefore, there is a synergistic effect between the various antibacterial and deodorizing ingredients (photocatalytic nanomaterials, nano-grade tea polyphenols, polyhexamethylene hydrochloride, acidic substances and β-cyclodextrin) in Example 1. These ingredients work together to improve the antibacterial and deodorizing properties of the fabric while maintaining good washability and physical properties.

[0378] However, the comparative example 6 lacks β-cyclodextrin, which weakens the synergistic effect of other ingredients and cannot effectively improve the antibacterial and deodorizing properties of the fabric. It is also easy to fall off after multiple washings, resulting in a decrease in performance.

[0379] The fabric of Comparative Example 7 is not as good as that of Example 1 in terms of antibacterial performance, deodorizing performance, washing resistance, pH value and color fastness because it uses an impregnation process instead of an electrospinning process. Because the impregnation process makes the antibacterial and deodorizing components not tightly bound to the cotton fibers, they are easily detached during the washing process, thus affecting the antibacterial and deodorizing performance of the fabric. In Example 1, multiple antibacterial and deodorizing compositions are evenly distributed on the cotton fibers through electrospinning technology, which not only improves the functionality of the fabric, but also maintains the physical properties of the cotton fabric, making it show significant advantages in many aspects.

[0380] The fabric of Comparative Example 8 is not as good as that of Example 1 in terms of antibacterial performance, deodorizing performance, washing resistance, pH value and color fastness because it uses spraying treatment instead of electrospinning process. Because the spraying treatment makes the antibacterial and deodorizing components not tightly bound to the cotton fibers, they are easy to fall off during the washing process, thus affecting the antibacterial and deodorizing performance of the fabric. In Example 1, multiple antibacterial and deodorizing compositions are evenly distributed on the cotton fibers through electrospinning technology, which not only improves the functionality of the fabric, but also maintains the physical properties of the cotton fabric, making it show significant advantages in many aspects.

[0381] The fabric of Comparative Example 9 is inferior to that of Example 1 in terms of antibacterial performance, deodorizing performance, washability, physical properties, pH value and color fastness due to the lower carding machine speed and spinning voltage. Due to the lower carding machine speed and spinning voltage, the antibacterial and deodorizing composition is not evenly distributed on the cotton fibers, the binding force is weak, and it is easy to fall off during washing, thereby affecting the antibacterial and deodorizing properties of the fabric.

[0382] Since the fabric of Comparative Example 10 was not subjected to acid recovery treatment, its performance in terms of antibacterial performance, deodorizing performance, washing resistance, pH value and color fastness was not as good as that of Example 1. Because acid recovery treatment can adjust the pH value of the fabric, enhance the binding force of the antibacterial and deodorizing components on the cotton fiber, so that it is not easy to fall off after multiple washings, thereby improving the antibacterial and deodorizing properties of the fabric.

[0383] Therefore, by comparing the data of Example 1 with Comparative Examples 1-10, it can be seen that Example 1 shows significant advantages in antibacterial performance, deodorizing performance, washability and physical properties. This is mainly because Example 1 uses electrostatic spinning technology to evenly distribute a specific antibacterial and deodorizing composition (containing photocatalytic nanomaterials, nano-grade tea polyphenols, acidic substances, polyhexamethylene hydrochloride and β-cyclodextrin) on cotton fibers to form a stable micro-nano fiber layer. Therefore, through the electrostatic spinning and specific antibacterial and deodorizing composition described in the present application, not only the durability and washability of the antibacterial and deodorizing function are improved, but also the comfort and physical properties of cotton fabrics are maintained, with obvious synergistic effects.

[0384] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A preparation process of a pure cotton antibacterial and deodorizing fabric, characterized in that: The spinning suspension containing the antibacterial and deodorizing composition is added to the cotton web in the carding stage by using the electrostatic spinning process to obtain the cotton web treated with antibacterial and deodorizing treatment; The cotton net treated with antibacterial and deodorizing treatment is prepared through spinning and weaving process to form antibacterial and deodorizing fabric; The antibacterial and deodorizing composition comprises at least one of a photocatalytic nanomaterial, tea polyphenols, polyhexamethylene hydrochloride and an acidic substance; The electrospinning process is controlled as follows: temperature is 20-28°C, humidity is 40%-80%, carding machine speed is 260-350r / min, vertical height of spinneret from cotton web is 15-30cm, spinning voltage is 50-70kV.

2. The preparation process according to claim 1, characterized in that: The antibacterial and deodorizing composition comprises the following raw materials in parts by weight: 0.5-1.5 parts of photocatalytic material, 0.5-2 parts of tea polyphenols, 1-2 parts of polyhexamethylene hydrochloride, and 1-3 parts of acidic substance.

3. The preparation process according to claim 1, characterized in that: The photocatalytic nanomaterial includes at least one of nano ZnO, nano TiO2 and nano SiO2.

4. The preparation process according to claim 1, characterized in that: The tea polyphenols are nano-grade tea polyphenols.

5. The preparation process according to claim 1, characterized in that: The acidic substance includes at least one of alginic acid / sodium alginate, formic acid / sodium formate, acetic acid / sodium acetate, acetic acid / sodium acetate, and citric acid / sodium citrate.

6. The preparation process according to claim 1, characterized in that: The antibacterial and deodorizing composition further comprises 0.3-1.5 parts of β-cyclodextrin.

7. The preparation process according to claim 1, characterized in that: The spinning suspension comprises the following raw materials in weight content: 8-12% polymer, 2-4% antibacterial and deodorizing composition, and the rest solvent; The polymer is at least one of polyacrylonitrile, polyvinyl alcohol, cellulose acetate and polyurethane; The solvent is at least one of N,N-dimethylformamide, methanol, ethanol, acetone and deionized water.

8. The preparation process according to claim 1, characterized in that: The spinning and weaving process comprises the following processes in sequence: cotton net treated with antibacterial and deodorizing treatment → raw sliver → drawing → roving → spun yarn → winding → finished yarn → weaving → pre-treatment → dyeing → acid treatment → shaping → pre-shrinking → finished product; The acid back treatment is to use acid solution to treat the dyed fabric so that the pH value of the fabric reaches 4-5.

9. A product, characterized in that The invention relates to a fabric obtained by any one of the preparation processes of claims 1 to 8.

10. The product according to claim 9, characterized in that The products include baby clothes, baby diapers, underwear, underpants, bed sheets, quilt covers, and pillowcases.

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