Fine mist preparation method of Janus polyester fabric with one-way moisture conduction and antibacterial functions

Abstract

The invention belongs to the field of new textile materials, and discloses a mist preparation method of a Janus polyester fabric with one-way moisture conduction and antibacterial functions, which comprises the following steps: step 1, spraying and grafting an aminopropyltriethoxysilane solution to the surface of one side of the polyester fabric, washing and drying to obtain an aminated / polyester fabric; step 2, spraying a mixed aqueous solution of copper acetate and cysteine to the surface of the same side of the polyester fabric, baking, and repeating the spraying-baking operation for three times to obtain the Janus polyester fabric with the one-way moisture conduction and antibacterial functions. The problems that an existing preparation method is complex and high in energy consumption, and the prepared polyester fabric is single in function, large in skin irritation, poor in sanitary safety and the like are solved, and meanwhile the original wearing properties such as tensile strength and flexibility of the polyester fabric can be reserved.

Description

Technical Field

[0001] The invention belongs to the field of new textile materials and relates to a method for preparing Janus polyester fabric with unidirectional moisture conduction and antibacterial functions by using fine mist. Background Art

[0002] With the advancement of science and technology and the diversification of consumer demand, textile products with multiple functions such as waterproof and breathable, antibacterial and antiviral, moisture absorption and perspiration are becoming more and more popular. Polyester fabrics are widely used in daily life due to their high mechanical strength, elasticity, durability, wrinkle resistance and ironing-free characteristics. However, polyester fabrics have poor moisture conductivity, and wearing them in summer can easily cause a stuffy feeling and breed bacteria, thus affecting human comfort and safety. Therefore, in the field of textiles, the development of fabrics that can integrate multiple functions has become an important research direction.

[0003] Janus fabric is a unique double-sided functional fabric with different surface structures and properties on both sides, which enables it to exhibit different functions on the same fabric. This fabric can meet application scenarios where multiple needs exist simultaneously. Chinese invention patent CN115075018A discloses a one-way moisture-conducting polyester fabric prepared based on coating finishing technology and a preparation method thereof. Chinese invention patent CN116572613A provides a moisture-absorbing and moisture-conducting bio-based polyester fabric and a preparation method thereof, but these methods have complicated preparation processes and the polyester fabric has a single function and does not achieve antibacterial properties. In addition, they require long-term high-temperature treatment, which not only consumes a lot of energy, but also has a large amount of wastewater discharge.

[0004] Copper ion is a highly effective antibacterial agent and is widely used in the preparation of antibacterial fabrics. For example, Chinese invention patent CN118286520A discloses a method for preparing polydopamine / polylysine / copper ion antibacterial functional coating. Another example is Chinese invention patent CN115652627A discloses a method for weaving copper ion antibacterial fabrics using copper-containing antibacterial fibers through blending technology. However, these fabric products cannot avoid contact between copper-containing fabric fibers and human skin, and the risk of sanitation, safety and toxicity is relatively high. Summary of the invention

[0005] In order to solve the above-mentioned technical problems existing in the prior art, the present invention provides a fine mist preparation method for Janus polyester fabric with unidirectional moisture conduction and antibacterial functions, which uses fine mist finishing to construct a copper-containing antibacterial layer on one side of the polyester fabric, and does not treat the other side, thereby retaining the original hydrophobic properties of the polyester fabric. Because the antibacterial layer has hydrophilic properties, it forms a difference in hydrophilicity and hydrophobicity with the untreated layer, and can achieve unidirectional moisture conduction while achieving the antibacterial function. The present invention overcomes the problems of the existing preparation method being complex and high energy consumption, the prepared polyester fabric having a single function, high skin irritation, and poor hygiene and safety, while retaining the original wearing properties of the polyester fabric, such as tensile strength and flexibility.

[0006] To achieve the above object, the present invention provides the following technical solutions: A method for preparing fine mist of Janus polyester fabric with unidirectional moisture conduction and antibacterial functions comprises the following steps: Step 1, spraying aminopropyltriethoxysilane solution onto one side surface of polyester fabric, washing and drying to obtain aminated / polyester fabric; Step 2: spray a mixed aqueous solution of copper acetate and cysteine ​​onto the same side surface of the polyester fabric and bake it, repeat the spray-baking operation three times to obtain a Janus polyester fabric with unidirectional moisture conduction and antibacterial functions.

[0007] Furthermore, the solvent of the aminopropyltriethoxysilane solution in step 1 is a mixed solution of ethanol and water, and the volume ratio of ethanol to water is 3:1 to 5:1.

[0008] Furthermore, the solute mass percentage of the aminopropyltriethoxysilane solution in step 1 is 0.6-1.4%.

[0009] Furthermore, in step 1, the grafting reaction temperature is 70-80° C., and the reaction time is 1-3 minutes.

[0010] Furthermore, in step 1, the wet weight gain of the polyester fabric is 1 to 3 g / m2.

[0011] Furthermore, the mass percentage of copper acetate in the mixed aqueous solution in step 2 is 0.05-0.2%, and the pH value is 9-11.

[0012] Furthermore, the mass percentage of cysteine ​​in the mixed aqueous solution in step 2 is 0.1-0.3%.

[0013] Furthermore, in step 2, the wet weight gain of the polyester fabric is 1 to 3 g / m2.

[0014] The Janus polyester fabric of the present invention exhibits dual properties of antibacterial and moisture conduction on one side. The principle of its antibacterial function mainly comes from the fact that when copper ions on the surface of the polyester fabric come into contact with bacteria, they can destroy the cell membrane of bacteria, thereby achieving the effect of eliminating bacteria; while the unilateral moisture conduction function is based on the different hydrophilicity and hydrophobicity on both sides of the Janus polyester fabric, forming a wettability gradient, which promotes the transmission of sweat from the hydrophobic side to the hydrophilic side along an irreversible direction.

[0015] Beneficial effects of the present invention: (1) Janus polyester fabric can be prepared by a simple fine mist finishing method, achieving both antibacterial and unidirectional moisture conduction functions; (2) The preparation process does not require long-term high-temperature treatment, which can effectively save energy and reduce wastewater discharge; (3) The functional material is only connected to one side of the polyester fabric, and the fabric surface that contacts the skin is not treated. This not only preserves the original properties of the polyester fabric, but also solves the technical problems of traditional antibacterial fabrics such as high skin irritation and poor hygiene and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a flow chart of the preparation method of fine mist of Janus polyester fabric with unidirectional moisture conduction and antibacterial functions.

[0017] Figure 2 This is the surface morphology of the original PET.

[0018] Figure 3 This is the surface morphology of PET-APTES (polyester fabric treated with aminopropyltriethoxysilane).

[0019] Figure 4 This is the surface morphology of Janus-PET fabric (prepared in Example 1).

[0020] Figure 5 The water vapor permeability graphs of the original PET, comparative example, and polyester fabric prepared in Example 1.

[0021] Figure 6 This is a graph of the tensile strength at break of the polyester fabric prepared from the original PET, comparative example, and Example 1.

[0022] Figure 7 This is a diagram showing the antibacterial effects of the original PET and the Janus-PET fabric prepared in Example 1 on Escherichia coli and Staphylococcus aureus. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] like Figure 1As shown, the fine mist preparation method of the Janus polyester fabric with unilateral moisture conductivity and antibacterial function of the present invention comprises the following steps: using fine mist spray to spray aminopropyl triethoxysilane solution onto one side of the polyester fabric, and using the coupling reaction of aminopropyl triethoxysilane to introduce a large number of amine groups onto the surface of one side of the polyester fabric; then a mixed aqueous solution of copper acetate and cysteine ​​is atomized and sprayed onto the same side of the polyester fabric, and cysteine ​​is linked through the amidation reaction of cysteine ​​and the amino group on the fiber surface; finally, the mixed aqueous solution of copper acetate and cysteine ​​is repeatedly sprayed, and the chelation effect of copper ions and cysteine ​​is used to achieve high-density coating of copper ions. Specifically, the following steps are included: Step 1, spraying aminopropyltriethoxysilane solution onto one side surface of polyester fabric (PET), washing and drying to obtain aminated / polyester fabric (PET-APTES); Step 2: spray a mixed aqueous solution of copper acetate and cysteine ​​onto the same side surface of the polyester fabric and bake it, repeat the spray-baking operation three times to obtain a Janus polyester fabric with unidirectional moisture conductivity and antibacterial function.

[0025] like Figure 2-Figure 4 As shown, the surface morphology of original PET, PET-APTES and Janus-PET fabrics changed.

[0026] The solvent of the aminopropyl triethoxysilane solution in step 1 is a mixed solution of ethanol and water, the volume ratio of ethanol to water is 3:1~5:1, the mass percentage of the solute is 0.6~1.4%, the grafting reaction temperature is 70~80°C, and the reaction time is 1~3 minutes. The solution spray treatment needs to remove droplets with a particle size of >10 microns and control the wet weight gain of the fabric to 1~3 grams per square meter. Experimental data show that when the solute content of aminopropyl triethoxysilane is higher than 1.4%, the air permeability of the polyester fabric decreases significantly. When the solute content of aminopropyl triethoxysilane is less than 0.6%, or the volume ratio of ethanol to water is lower than 3:1, the antibacterial ability of the polyester fabric will decrease. When the reaction temperature is lower than 70°C or the time is less than 1 minute, the antibacterial ability of the polyester fabric will decrease.

[0027] The mass percentage of copper acetate in the mixed aqueous solution described in step 2 is 0.05-0.2%, the pH value is 9-11, and the mass percentage of cysteine ​​is 0.1-0.3%. The spray treatment of the mixed aqueous solution needs to remove droplets with a particle size of >10 microns, and control the wet weight gain of the fabric to be 1-3 g / m2. It can be seen from the experimental data that when the wet weight gain is higher than 3 g / m2 or the mass percentage of cysteine ​​is higher than 0.3%, the tensile strength of the polyester fabric decreases accordingly, and when the wet weight gain is lower than 1 g / m2, the mass percentage of cysteine ​​is lower than 0.1% or the mass percentage of copper acetate is lower than 0.1%, the moisture conduction and bactericidal effect of the polyester fabric will be significantly reduced, and when the pH is lower than 9 or higher than 11, the antibacterial effect will be reduced. Example 1

[0028] A mixed solution of ethanol and water with a mass percentage of 1.4% aminopropyltriethoxysilane, with a volume ratio of ethanol to water of 4:1, is atomized using an air compression atomizer to remove droplets with a particle size greater than 10 microns, and is sprayed onto the surface of one side of the polyester fabric. The wet weight gain per square meter is controlled to be 1.5 grams, and the solution is heated at 80°C for 3 minutes and thoroughly washed and dried.

[0029] The pH value of a 0.2% by mass cysteine ​​solution was adjusted to 10.45 and mixed with a 0.1% by mass copper acetate solution. The solution was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The solution was atomized onto the surface of the polyester fabric to control the wet weight gain to 2.0 g per square meter. The fabric was thoroughly washed and dried, and the above operation was repeated three times.

[0030] The antibacterial rates of the obtained Janus polyester fabric against Escherichia coli and Staphylococcus aureus were 99.96% and 99.98%, respectively, and the skin irritation level was low. The water vapor permeability of the polyester fabric was 1030g / m 2 / d, water absorption is 178%, tensile strength is 51.0MPa. The antibacterial efficiency reaches 99.52% and 99.62% after 120 washing cycles or 1000 frictions.

[0031] like Figure 5 and Figure 6 As shown, the water vapor permeability of the polyester fabrics prepared by the original PET, the comparative example, and Example 1 increased significantly, and the tensile strength at break increased; Figure 7 As shown, compared with the original PET, the antibacterial effect of the Janus-PET fabric prepared in Example 1 on Escherichia coli and Staphylococcus aureus was significantly enhanced. Example 2

[0032] A mixed solution of ethanol and water with a mass percentage of 1.0% aminopropyltriethoxysilane, with a volume ratio of ethanol to water of 4:1, is atomized using an air compression atomizer to remove droplets with a particle size greater than 10 microns, and is sprayed onto the surface of one side of the polyester fabric. The wet weight gain per square meter is controlled to be 1.5 grams, and the solution is heated at 80°C for 1 minute and thoroughly washed and dried.

[0033] The pH value of a 0.2% by mass cysteine ​​solution was adjusted to 9.15 and mixed with a 0.1% by mass copper acetate solution. The solution was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The solution was atomized onto the surface of the polyester fabric to control the wet weight gain to 2.0 g per square meter. The fabric was washed and dried thoroughly and the above operation was repeated three times.

[0034] The antibacterial rates of the obtained Janus polyester fabric against Escherichia coli and Staphylococcus aureus were 94.86% and 95.38%, respectively, and the skin irritation level was low. The water vapor permeability of the polyester fabric was 3853 g / m 2 / d, water absorption rate is 175%, tensile strength is 49.2MPa. The antibacterial efficiency reaches 89.66% and 90.21% after 120 washing cycles or 1000 frictions. Example 3

[0035] A mixed solution of ethanol and water with a mass percentage of 1.0% aminopropyltriethoxysilane, with a volume ratio of ethanol to water of 4:1, is atomized using an air compression atomizer to remove droplets with a particle size greater than 10 microns, and is sprayed onto the surface of one side of the polyester fabric. The wet weight gain per square meter is controlled to be 1.5 grams, and the solution is heated at 80°C for 3 minutes and thoroughly washed and dried.

[0036] The pH value of a 0.3% by mass cysteine ​​solution was adjusted to 10.05 and mixed with a 0.1% by mass copper acetate solution. The solution was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The solution was atomized onto the surface of the polyester fabric to control the wet weight gain to 2.0 g per square meter. The fabric was thoroughly washed and dried, and the above operation was repeated three times.

[0037] The antibacterial rates of the obtained Janus polyester fabric against Escherichia coli and Staphylococcus aureus were 99.96% and 99.97%, respectively, and the skin irritation level was medium. The water vapor permeability of the polyester fabric was 4115 g / m 2 / d, water absorption is 180%, tensile strength is 52.9MPa. The antibacterial efficiency reaches 99.63% and 99.71% after 120 washing cycles or 1000 frictions. Example 4

[0038] A mixed solution of ethanol and water with a mass percentage of 1.0% aminopropyltriethoxysilane, with a volume ratio of ethanol to water of 5:1, is atomized using an air compression atomizer to remove droplets with a particle size greater than 10 microns, and is sprayed onto the surface of one side of the polyester fabric. The wet weight gain per square meter is controlled to be 1.5 grams, and the solution is heated at 70°C for 2 minutes and thoroughly washed and dried.

[0039] The pH value of a 0.2% by mass cysteine ​​solution was adjusted to 10.85 and mixed with a 0.2% by mass copper acetate solution. The solution was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The solution was atomized onto the surface of the polyester fabric to control the wet weight gain to 2.0 g per square meter. The fabric was thoroughly washed and dried, and the above operation was repeated three times.

[0040] The antibacterial rates of the obtained Janus polyester fabric against Escherichia coli and Staphylococcus aureus were 99.98% and 99.99%, respectively, and the skin irritation level was high. The water vapor permeability of the polyester fabric was 4115 g / m 2 / d, water absorption is 179%, tensile strength is 53.1MPa. The antibacterial efficiency reaches 99.45% and 99.63% after 120 washing cycles or 1000 frictions. Example 5

[0041] A mixed solution of ethanol and water with a mass percentage of 1.0% aminopropyltriethoxysilane, with a volume ratio of ethanol to water of 3:1, is atomized using an air compression atomizer to remove droplets with a particle size greater than 10 microns, and is sprayed onto the surface of one side of the polyester fabric. The wet weight gain per square meter is controlled to be 1.5 grams, and the solution is heated at 80°C for 1 minute and thoroughly washed and dried.

[0042] The pH value of a 0.2% by mass cysteine ​​solution was adjusted to 9.45 and mixed with a 0.2% by mass copper acetate solution. The solution was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The solution was atomized onto the surface of the polyester fabric to control the wet weight gain to 2.0 g per square meter. The fabric was thoroughly washed and dried, and the above operation was repeated three times.

[0043] The antibacterial rates of the obtained Janus polyester fabric against Escherichia coli and Staphylococcus aureus were 99.99% and 99.99%, respectively, and the skin irritation level was low. The water vapor permeability of the polyester fabric was 4962 g / m 2 / d, water absorption is 182%, tensile strength is 53.2MPa. The antibacterial efficiency reaches 99.86% and 99.88% after 120 washing cycles or 1000 frictions.

[0044] Comparative Example 1 A mixed solution of ethanol and water with a mass percentage of 1.0% aminopropyltriethoxysilane, with a volume ratio of ethanol to water of 4:1, is atomized using an air compression atomizer to remove droplets with a particle size greater than 10 microns, and is sprayed onto the surface of one side of the polyester fabric. The wet weight gain per square meter is controlled to be 1.5 grams, and the solution is heated at 80°C for 3 minutes and thoroughly washed and dried.

[0045] The obtained aminated / polyester fabric had no significant killing effect on Escherichia coli and Staphylococcus aureus. The irritation level to the skin was low, and the water vapor permeability of the aminated / polyester fabric was 1120 g / m 2 / d, water absorption is 161%, tensile strength is 50.1MPa. Water vapor permeability and flexibility are similar to those of original polyester fabric.

[0046] Comparative Example 2 The pH value of a 0.2% by mass cysteine ​​solution was adjusted to 10.45 and mixed with a 0.1% by mass copper acetate solution. The solution was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The solution was atomized onto the surface of one side of a clean polyester fabric. The wet weight gain was controlled to be 2.0 g per square meter. The fabric was thoroughly washed and dried. The above operation was repeated three times.

[0047] The antibacterial rate of the obtained antibacterial polyester fabric against Escherichia coli and Staphylococcus aureus was 50.12% and 52.44%, respectively, and the skin irritation level was medium, but the fabric lost its antibacterial properties after 120 washing cycles or 1000 frictions. The water vapor permeability of the polyester fabric was 1152 g / m 2 / d, water absorption is 165% and tensile strength is 48.3MPa.

[0048] Comparative Example 3 A mixed solution of ethanol and water with a mass percentage of 1.8% aminopropyltriethoxysilane, with a volume ratio of ethanol to water of 2:1, is atomized using an air compression atomizer to remove droplets with a particle size greater than 10 microns, and is sprayed onto the surface of one side of the polyester fabric. The wet weight gain per square meter is controlled to be 1.5 grams, and the solution is heated at 80°C for 3 minutes and thoroughly washed and dried.

[0049] The pH value of a 0.2% by mass cysteine ​​solution was adjusted to 10.45 and mixed with a 0.1% by mass copper acetate solution. The solution was atomized using an air compression atomizer to remove droplets with a particle size greater than 10 μm. The solution was atomized onto the surface of the polyester fabric to control the wet weight gain to 4.0 g per square meter. The fabric was thoroughly washed and dried, and the above operation was repeated three times.

[0050] The antibacterial rates of the obtained Janus polyester fabric against Escherichia coli and Staphylococcus aureus were 63.55% and 65.24%, respectively, and the skin irritation level was low. The water vapor permeability of the polyester fabric was 2130 g / m 2 / d, water absorption rate is 181%, tensile strength is 43.2MPa. The antibacterial efficiency reaches 58.44% and 59.78% after 120 washing cycles or 1000 frictions.

[0051] The preparation conditions of each embodiment and comparative example and the product performance characterization results are shown in Table 1 and Table 2.

[0052] Table 1 Preparation conditions of modified polyester fabrics

[0053]

[0054] Table 2 Product performance characterization results

[0055]

[0056] The above description and the figures are only preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the principle of the present invention, which should also be considered to belong to the protection scope of the present invention.

Claims

1. A method for preparing fine mist of Janus polyester fabric with unidirectional moisture conduction and antibacterial functions, characterized in that The steps include: Step 1, spraying aminopropyltriethoxysilane solution onto one side surface of polyester fabric, washing and drying to obtain aminated / polyester fabric; Step 2: spray a mixed aqueous solution of copper acetate and cysteine ​​onto the same side surface of the polyester fabric and bake it, repeat the spray-baking operation three times to obtain a Janus polyester fabric with unidirectional moisture conduction and antibacterial functions.

2. The method for preparing fine mist of Janus polyester fabric with unidirectional moisture conduction and antibacterial function according to claim 1, characterized in that: The solvent of the aminopropyltriethoxysilane solution in step 1 is a mixed solution of ethanol and water, and the volume ratio of ethanol to water is 3:1-5:

1.

3. The method for preparing fine mist of Janus polyester fabric with unidirectional moisture conduction and antibacterial function according to claim 1, characterized in that: The solute mass percentage of the aminopropyltriethoxysilane solution in step 1 is 0.6-1.4%.

4. The method for preparing fine mist of Janus polyester fabric with unidirectional moisture conduction and antibacterial function according to claim 1, characterized in that: In step 1, the grafting reaction temperature is 70-80° C., and the reaction time is 1-3 minutes.

5. The method for preparing fine mist of Janus polyester fabric with unidirectional moisture conduction and antibacterial function according to claim 1, characterized in that: The wet weight gain of the polyester fabric in step 1 is 1-3 g / m2.

6. The method for preparing fine mist of Janus polyester fabric with unidirectional moisture conduction and antibacterial function according to claim 1, characterized in that: The mass percentage of cupric acetate in the mixed aqueous solution in step 2 is 0.05-0.2%, and the pH value is 9-11.

7. The method for preparing fine mist of Janus polyester fabric with unidirectional moisture conduction and antibacterial function according to claim 1, characterized in that: The mass percentage of cysteine ​​in the mixed aqueous solution in step 2 is 0.1-0.3%.

8. The method for preparing fine mist of Janus polyester fabric with unidirectional moisture conduction and antibacterial function according to claim 1, characterized in that: The wet weight gain of the polyester fabric in step 2 is 1-3 g / m2.

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