Unidirectional moisture-conducting cotton fabric prepared based on etching technology and preparation method of unidirectional moisture-conducting cotton fabric

Abstract

The invention relates to a one-way moisture-conducting cotton fabric prepared based on an etching technology and a preparation method of the one-way moisture-conducting cotton fabric. The fabric can be prepared by adopting the following method: firstly, performing hydrophilic finishing on a cotton fabric to prepare the hydrophilic-finished cotton fabric; secondly, preparing a polyacrylic acid coating agent; coating finishing is conducted on the cotton fabric obtained after hydrophilic finishing is conducted again; and finally, carrying out etching finishing to obtain the unidirectional moisture-conducting cotton fabric. The one-way moisture guiding performance of the prepared cotton fabric reaches the fifth level, and the cotton fabric has good moisture absorbing and quick drying performance; after being washed for 10 times, the fabric still has good moisture absorption and quick drying performance, and the one-way moisture conduction performance and the moisture absorption and quick drying performance of the fabric are close to or slightly superior to those of one-way moisture conduction cotton fabrics purchased in the market.

Description

Technical Field

[0001] This invention belongs to the field of fabric preparation technology, specifically relating to a unidirectional moisture-wicking cotton fabric prepared based on etching technology and its preparation method. Background Technology

[0002] As people's living standards improve, exercise and fitness have become an essential part of daily life. Exercise and fitness clothing needs to have the functions of sweat absorption, breathability and quick-drying to meet the requirements of use. Therefore, the fabric needs to have excellent one-way moisture wicking properties.

[0003] Cotton fabrics are soft, natural, and comfortable to wear when dry, making them popular with consumers. However, their moisture-wicking properties are poor; when the body sweats heavily, sweat accumulates and condenses between the clothing and the skin, sticking to the skin. One-way moisture-wicking fabrics are functional fabrics with practical applications, capable of transferring water molecules unidirectionally from the inside to the outside of the garment, improving its thermal and moisture comfort.

[0004] Literature review indicates that one-way moisture retention in cotton fabrics has received widespread attention. For example, Chinese invention patent application number 201911344139.7 discloses a method for preparing a multifunctional one-way moisture-wicking cotton fabric: fumed silica is hydrophobically modified using a silane coupling agent, dispersed in anhydrous ethanol to prepare a hydrophobic fumed silica anhydrous ethanol dispersion; the hydrophobic fumed silica anhydrous ethanol dispersion is mixed with a fluorinated water-repellent agent to prepare a water-repellent coating agent; the cotton fabric is coated with the water-repellent coating agent using a single-sided, intermittent coating finish, followed by pre-drying and baking to obtain the multifunctional one-way moisture-wicking cotton fabric.

[0005] Currently, there are many methods to achieve unidirectional moisture wicking: physical methods include fiber denier reduction treatment, plasma etching, and photocatalytic treatment; chemical methods include coating treatment and padding finishing agents. The patent mentioned above uses coating treatment, but this method results in poor washability of the fabric, and the moisture wicking capacity will decrease rapidly after multiple washes.

[0006] Plasma etching technology has attracted researchers' attention due to its excellent results. Its principle involves using plasma generated by an instrument to bombard the surface of textile materials, altering their surface structure. This etching process, known as sputtering etching, generally produces good results and does not significantly affect other properties of the fibers or fabrics. Therefore, developing new processes for producing unidirectional moisture-wicking cotton fabrics using etching technology has promising application prospects. Summary of the Invention

[0007] In view of the above-mentioned drawbacks of the existing technology, the purpose of this invention is to provide a unidirectional moisture-wicking cotton fabric prepared based on etching technology and its preparation method.

[0008] The purpose of this invention is to provide a unidirectional moisture-wicking cotton fabric prepared based on etching technology. This cotton fabric has the characteristics of unidirectional moisture wicking and environmental protection. The fabric can be prepared by the following method: first, the cotton fabric is hydrophilically treated to obtain a hydrophilically treated cotton fabric; second, a polyacrylic acid coating agent is prepared; third, the hydrophilically treated cotton fabric is coated; and finally, etching is performed to obtain a unidirectional moisture-wicking cotton fabric.

[0009] The objective of this invention is achieved through the following technical solution:

[0010] The preparation method of unidirectional moisture-wicking cotton fabric based on etching technology includes the following steps:

[0011] (1) Hydrophilic finishing: Dissolve chloroacetic acid in tap water, adjust the pH of the solution to 9-11 with alkali solution, and prepare finishing solution; heat the finishing solution to 90-100℃, immerse cotton fabric in the finishing solution for 1-2 hours; then, roll the soaked fabric through a trolley, heat set at 140-160℃ for 30-60s, and obtain the hydrophilic finished cotton fabric.

[0012] Preferably, the ratio of chloroacetic acid to tap water is 1g:(100-200)mL; the ratio of cotton fabric to finishing solution is 1g:(10-20)mL.

[0013] (2) Preparation of polyacrylic coating agent: Measure sodium dodecylbenzenesulfonate, octylphenol polyoxyethylene ether (OP-10), acrylic acid, styrene, butyl acrylate and ammonium persulfate. Dissolve all sodium dodecylbenzenesulfonate, octylphenol polyoxyethylene ether (OP-10) and 1 / 3 of the total amount of acrylic acid, styrene, butyl acrylate and ammonium persulfate initiator in deionized water, stir evenly, control the temperature at 75-85℃, and stir for 1-2 hours. Then, dissolve the remaining 2 / 3 of acrylic acid, styrene, butyl acrylate and ammonium persulfate in deionized water and add it dropwise to the mixed solution that was just stirred. Control the dropwise addition time at 2-3 hours. After the dropwise addition is completed, keep warm for 2-3 hours. If the emulsion does not separate or precipitate after one month, the polyacrylic coating agent can be obtained.

[0014] Preferably, the ratio of sodium dodecylbenzenesulfonate, octylphenol polyoxyethylene ether (OP-10), acrylic acid, styrene, butyl acrylate and ammonium persulfate is: 1g∶(1~2)g∶(0.1~0.2)mol∶(0.2~0.4)mol∶(0.1~0.2)mol∶(0.5~1)g.

[0015] (3) Hydrophobic finishing: The inner side of the hydrophilic cotton fabric prepared in step (1) is coated with the coating agent prepared in step (2) by the scraper coating process, dried at 90-95℃ for 3 minutes and baked at 140-160℃ for 5 minutes.

[0016] Preferably, the coating weight (dry weight) of the coating finishing is 10–20 g / m². 2 .

[0017] (4) Etching technique finishing: The inner side of the cotton fabric prepared in step (3) after coating is placed at a distance of 50-70cm from the plasma nozzle for Ar plasma irradiation treatment to obtain a unidirectional moisture-wicking cotton fabric.

[0018] Preferably, the processing conditions are: irradiation power of 120-240W and irradiation time of 8-12min.

[0019] The present invention relates to a one-way moisture-wicking principle: the different hydrophilic and hydrophobic properties on both sides of the fabric create an additional pressure difference along the fabric's thickness from the hydrophobic layer to the hydrophilic layer. This additional pressure difference causes moisture to wick away moisture, achieving a one-way moisture-wicking effect. This is the main principle behind the one-way moisture-wicking function of fabrics. In this invention, to more quickly and fully transfer sweat to the outer layer of the cotton fabric, a coating and etching process is used to make the inner side of the fabric hydrophobic, while grafting hydrophilic groups makes the outer side of the fabric hydrophilic.

[0020] This invention has the following significant features:

[0021] (1) The present invention achieves hydrophobicity on the inner side of the fabric through coating and etching technology, and hydrophilicity on the outer side of the fabric through grafting hydrophilic groups; the two sides of the fabric have different hydrophilicity and hydrophobicity, thus realizing the one-way moisture-wicking function of the fabric.

[0022] (2) The preparation method of the present invention is simple, the raw materials are widely available, and it has a good prospect for application and promotion.

[0023] (3) The cotton fabric prepared by the present invention has a unidirectional moisture wicking performance of level 5 and has good moisture absorption and quick-drying performance; after 10 washes, the fabric still has good moisture absorption and quick-drying performance, and its unidirectional moisture wicking and moisture absorption and quick-drying performance is close to or slightly exceeds that of unidirectional moisture wicking cotton fabrics purchased on the market. Detailed Implementation

[0024] The present invention is described in detail below with reference to the embodiments and comparative examples.

[0025] Example 1

[0026] In this embodiment, the unidirectional moisture-wicking cotton fabric prepared based on etching technology is prepared by the following method, including the following steps:

[0027] (1) Hydrophilic finishing: Dissolve 1g of chloroacetic acid in 150mL of tap water, adjust the pH of the solution to 10 with alkali solution, and prepare finishing solution; heat the finishing solution to 95℃, immerse cotton fabric in the finishing solution for 1.5 hours, the ratio of cotton fabric to finishing solution is 1g:15mL; then, roll the soaked fabric through a trolley, heat set at 150℃ for 45s, and obtain the hydrophilic finished cotton fabric.

[0028] (2) Preparation of polyacrylic acid coating agent: Measure 1g sodium dodecylbenzenesulfonate, 1.5g octylphenol polyoxyethylene ether (OP-10), 0.15mol acrylic acid, 0.3mol styrene, 0.15mol butyl acrylate and 0.75g ammonium persulfate. Dissolve all sodium dodecylbenzenesulfonate, octylphenol polyoxyethylene ether (OP-10) and 1 / 3 of the total amount of acrylic acid, styrene, butyl acrylate and ammonium persulfate initiator in 200mL of deionized water, stir evenly, control the temperature at 80℃, and stir for 1.5h. Then, dissolve the remaining 2 / 3 of acrylic acid, styrene, butyl acrylate and ammonium persulfate initiator in 200mL of deionized water and add it dropwise to the mixed solution just stirred. Control the dropwise addition time at 2.5h. After the dropwise addition is completed, keep warm for 2.5h. If the emulsion does not separate or precipitate after one month, the polyacrylic acid coating agent can be obtained.

[0029] (3) Hydrophobic finishing: The inner side of the hydrophilic cotton fabric prepared in step (1) is coated using the coating agent prepared in step (2) through a doctor blade coating process. The coating amount is 15 g / m² (dry weight). 2 Dry at 92℃ for 3 minutes, then bake at 150℃ for 5 minutes.

[0030] (4) Etching technique finishing: The inner side of the cotton fabric prepared in step (3) after coating is placed at a distance of 60cm from the plasma nozzle for Ar plasma irradiation treatment. The irradiation power is 180W and the irradiation time is 10min to obtain unidirectional moisture-wicking cotton fabric a.

[0031] Example 2

[0032] In this embodiment, the unidirectional moisture-wicking cotton fabric prepared based on etching technology is prepared by the following method, including the following steps:

[0033] (1) Hydrophilic finishing: Dissolve 1g of chloroacetic acid in 100mL of tap water, adjust the pH of the solution to 9 with alkali solution, and prepare finishing solution; heat the finishing solution to 90℃, immerse cotton fabric in the finishing solution for 1.0 hour, the ratio of cotton fabric to finishing solution is 1g:10mL; then, roll the soaked fabric through a trolley, heat set at 140℃ for 30s, and obtain the hydrophilic finished cotton fabric.

[0034] (2) Preparation of polyacrylic coating agent: Measure 1g sodium dodecylbenzenesulfonate, 1.0g octylphenol polyoxyethylene ether (OP-10), 0.10mol acrylic acid, 0.2mol styrene, 0.10mol butyl acrylate and 0.5g ammonium persulfate. Dissolve all sodium dodecylbenzenesulfonate, octylphenol polyoxyethylene ether (OP-10) and 1 / 3 of the total amount of acrylic acid, styrene, butyl acrylate and ammonium persulfate initiator in 200mL of deionized water, stir evenly, control the temperature at 75℃, and stir for 1.0h. Then, dissolve the remaining 2 / 3 of acrylic acid, styrene, butyl acrylate and ammonium persulfate initiator in 200mL of deionized water and add it dropwise to the mixed solution just stirred. Control the dropwise addition time at 2.0h. After the dropwise addition is completed, keep warm for 2.0h. If the emulsion does not separate or precipitate after one month, the polyacrylic coating agent can be obtained.

[0035] (3) Hydrophobic finishing: The inner side of the hydrophilic cotton fabric prepared in step (1) is coated using the coating agent prepared in step (2) through a doctor blade coating process. The coating amount is 10 g / m² (dry weight). 2 Dry at 90℃ for 3 minutes, then bake at 140℃ for 5 minutes.

[0036] (4) Etching technique finishing: The inner side of the cotton fabric prepared in step (3) after coating is placed at a distance of 50cm from the plasma gun nozzle for Ar plasma irradiation treatment. The irradiation power is 120W and the irradiation time is 8min to obtain unidirectional moisture-wicking cotton fabric b.

[0037] Example 3

[0038] In this embodiment, the unidirectional moisture-wicking cotton fabric prepared based on etching technology is prepared by the following method, including the following steps:

[0039] (1) Hydrophilic finishing: Dissolve 1g of chloroacetic acid in 200mL of tap water, adjust the pH of the solution to 11 with alkali solution, and prepare finishing solution; heat the finishing solution to 100℃, immerse cotton fabric in the finishing solution for 2 hours, the ratio of cotton fabric to finishing solution is 1g:20mL; then, roll the soaked fabric through a trolley, heat set at 160℃ for 60s, and obtain the hydrophilic finished cotton fabric.

[0040] (2) Preparation of polyacrylic coating agent: Measure 1g sodium dodecylbenzenesulfonate, 2g octylphenol polyoxyethylene ether (OP-10), 0.2mol acrylic acid, 0.4mol styrene, 0.2mol butyl acrylate and 1g ammonium persulfate. Dissolve all sodium dodecylbenzenesulfonate, octylphenol polyoxyethylene ether (OP-10) and 1 / 3 of the total amount of acrylic acid, styrene, butyl acrylate and ammonium persulfate initiator in 200mL of deionized water, stir evenly, control the temperature at 85℃, and stir for 2h. Then, dissolve the remaining 2 / 3 of acrylic acid, styrene, butyl acrylate and ammonium persulfate in 200mL of deionized water and add it dropwise to the mixed solution just stirred. Control the dropwise addition time at 3h. After the dropwise addition is completed, keep warm for 3h. If the emulsion does not separate or precipitate after one month, the polyacrylic coating agent can be obtained.

[0041] (3) Hydrophobic finishing: The inner side of the hydrophilic cotton fabric prepared in step (1) is coated using the coating agent prepared in step (2) through a doctor blade coating process. The coating amount is 20 g / m² (dry weight). 2 Dry at 95℃ for 3 minutes, then bake at 160℃ for 5 minutes.

[0042] (4) Etching technique finishing: The inner side of the cotton fabric prepared in step (3) after coating is placed at a distance of 70cm from the plasma nozzle for Ar plasma irradiation treatment. The irradiation power is 240W and the irradiation time is 12min to obtain unidirectional moisture-wicking cotton fabric c.

[0043] Comparative Example A

[0044] Compared with Example 1, in this comparative example, the amount of chloroacetic acid was changed, that is, "1g chloroacetic acid" in step (1) was changed to "0.1g chloroacetic acid", and other preparation methods were carried out according to the preparation method of Example 1 to obtain fabric d.

[0045] Comparative Example B

[0046] Compared with Example 1, in this comparative example, the amount of polyacrylic coating agent raw material was changed, that is, "0.15mol acrylic acid" in step (2) was changed to "0.015mol acrylic acid", and other preparation methods were carried out according to the preparation method of Example 1 to obtain fabric e.

[0047] Comparative Example C

[0048] Compared with Example 1, in this comparative example, the irradiation power and time were changed, that is, "irradiation power 180W, irradiation time 10min" in step (4) was changed to "irradiation power 30W, irradiation time 2min". Other preparation methods were carried out according to the preparation method of Example 1, and fabric f was obtained.

[0049] Application performance testing:

[0050] To better test the unidirectional moisture wicking and quick-drying properties of the cotton fabrics prepared in this invention, cotton fabrics a, b, c, d, e, and f prepared in the specific embodiments 1-3 and comparative examples A-C of this invention, as well as purchased unidirectional moisture wicking cotton fabrics, were selected. The unidirectional moisture wicking property test was conducted according to AATCC 195—2009 "Liquid Moisture Management Performance of Textiles," which tests the fabric's ability to unidirectionally transfer human sweat, and is divided into 1-5 levels, with level 5 being the best. Levels exceeding 3 are considered to have unidirectional moisture wicking effect. The quick-drying property test was conducted according to GB / T 21655.1—2008 "Evaluation of Moisture Absorption and Quick-Drying Properties of Textiles." The fabrics to be tested were subjected to standard washing according to GB / T 8629-2017 "Home Washing and Drying Procedures for Textile Testing," and the unidirectional moisture wicking and quick-drying properties of the initial samples and samples after 10 washes were tested. The test results are shown in Table 1.

[0051] Table 1. Analysis of the unidirectional moisture wicking and quick-drying properties of cotton fabrics a, b, c, d, e, f, and the purchased unidirectional moisture-wicking cotton fabrics.

[0052]

[0053]

[0054] As shown in Table 1, the cotton fabrics a, b, and c prepared in Examples 1-3 achieved a unidirectional moisture wicking performance of level 5, exhibiting good moisture absorption and quick-drying properties. After 10 washes, fabrics a, b, and c still maintained good moisture absorption and quick-drying properties, with their unidirectional moisture wicking and quick-drying properties approaching or slightly exceeding those of commercially available unidirectional moisture-wicking cotton fabrics. Therefore, it can be concluded that the cotton fabrics prepared in this invention possess good unidirectional moisture wicking and quick-drying properties. The cotton fabrics d, e, and f prepared in Comparative Example AC showed slightly poorer unidirectional moisture wicking and quick-drying properties, indicating that the amount of chloroacetic acid used in the hydrophilic finishing process, the amount of polyacrylic acid coating agent raw material, the irradiation power, and the irradiation time all significantly affect the unidirectional moisture wicking and quick-drying properties of the cotton fabrics.

Claims

1. A method for preparing a unidirectional moisture-wicking cotton fabric based on etching technology, characterized in that, The preparation method includes the following steps: (1) Hydrophilic finishing: Dissolve chloroacetic acid in tap water, adjust the pH of the solution to 9-11 with alkali solution, and prepare finishing solution; heat the finishing solution to 90-100℃, immerse cotton fabric in the finishing solution for 1-2 hours; then, roll the soaked fabric through a trolley, heat set at 140-160℃ for 30-60s, and obtain the hydrophilic finished cotton fabric. (2) Preparation of polyacrylic coating agent: Measure sodium dodecylbenzenesulfonate, octylphenol polyoxyethylene ether (OP-10), acrylic acid, styrene, butyl acrylate, and ammonium persulfate. Dissolve all of the sodium dodecylbenzenesulfonate, octylphenol polyoxyethylene ether (OP-10), and 1 / 3 of the total amount of acrylic acid, styrene, butyl acrylate, and ammonium persulfate initiator in deionized water. Stir evenly and control the temperature at 75-85℃ for 1-2 hours. Then, dissolve the remaining 2 / 3 of the acrylic acid, styrene, butyl acrylate, and ammonium persulfate initiator in deionized water and add it dropwise to the mixed solution that was just stirred. Control the dropwise addition time at 2-3 hours. After the dropwise addition is complete, keep warm for 2-3 hours. If the emulsion does not separate or precipitate after one month, the polyacrylic coating agent can be obtained. (3) Hydrophobic finishing: The inner side of the hydrophilic cotton fabric prepared in step (1) is coated with the coating agent prepared in step (2) by the scraper coating process, dried at 90-95℃ for 3 minutes and baked at 140-160℃ for 5 minutes. (4) Etching technique finishing: The inner side of the cotton fabric prepared in step (3) after coating is placed at a distance of 50-70cm from the plasma nozzle for Ar plasma irradiation treatment to obtain a unidirectional moisture-wicking cotton fabric.

2. The method for preparing a unidirectional moisture-wicking cotton fabric based on etching technology according to claim 1, characterized in that, The ratio of chloroacetic acid to tap water in step (1) is 1g:(100~200)mL.

3. The method for preparing a unidirectional moisture-wicking cotton fabric based on etching technology according to claim 1, characterized in that, The ratio of cotton fabric to finishing solution in step (1) is 1g:(10-20)mL.

4. The method for preparing a unidirectional moisture-wicking cotton fabric based on etching technology according to claim 1, characterized in that, The ratio of sodium dodecylbenzenesulfonate, octylphenol polyoxyethylene ether (OP-10), acrylic acid, styrene, butyl acrylate and ammonium persulfate used in step (2) is: 1g∶(1~2)g∶(0.1~0.2)mol∶(0.2~0.4)mol∶(0.1~0.2)mol∶(0.5~1)g.

5. The method for preparing a unidirectional moisture-wicking cotton fabric based on etching technology according to claim 1, characterized in that, The coating amount (dry weight) for the coating finishing process in step (3) is 10–20 g / m². 2 .

6. The method for preparing a unidirectional moisture-wicking cotton fabric based on etching technology according to claim 1, characterized in that, The processing conditions described in step (4) are: irradiation power of 120-240W and irradiation time of 8-12min.

7. A unidirectional moisture-wicking cotton fabric prepared based on etching technology, characterized in that, It is prepared by the method described in any one of claims 1 to 6.

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