Super-hydrophobic linen fabric and preparation method thereof

Abstract

The invention relates to a super-hydrophobic linen fabric and a preparation method thereof. The fabric can be prepared by the following method: firstly, preparing a polyacrylic acid coating agent from acrylic acid, vinyl-terminated polydimethylsiloxane, butyl acrylate and the like; then, the linen fabric is subjected to coating finishing; and finally, performing Ar plasma irradiation treatment on the finished linen fabric to obtain the super-hydrophobic linen fabric. The surface of the prepared super-hydrophobic linen fabric contains a low-surface-energy substance silicon element, the apparent contact angle range of water drops in the linen fabric ranges from 154 degrees to 158 degrees, and the super-hydrophobic linen fabric shows good super-hydrophobicity; after 10 times of water washing, the hydrophobicity of the linen fabric is still not obviously weakened.

Description

Technical Field

[0001] The invention belongs to the technical field of fabric preparation, and particularly relates to a super-hydrophobic linen fabric and a preparation method thereof. Background Art

[0002] In recent years, superhydrophobic textile fabrics have attracted widespread attention due to their excellent waterproof, anti-fouling, self-cleaning and reduced fluid viscosity properties. They have potential applications in waterproof clothing, protective clothing, industrial waterproof fabrics, medical fabrics, interior decorations, self-cleaning materials, microfluidic systems, lossless liquid transmission and biocompatibility. They have become a hot topic in the research of functional textile fabrics.

[0003] Flax is classified into three categories: fiber, oil, and fiber and oil. All are annual herbs. Due to its good hygroscopicity, fast moisture conduction, and relatively thin diameter, it is one of the main fiber raw materials for spring and summer clothes. Usually, the cloth woven from flax fibers is called linen fabric. Linen fabric has the functions of temperature regulation, anti-allergy, anti-static, and antibacterial. Internationally, linen products include handkerchiefs, shirt fabrics, crepe, fancy yarn products, sportswear, and linen-wool blended products; household products include curtains, wall cloths, tablecloths, bedding, etc.; industrial products include canvas, luggage tents, insulation cloth, filter cloth, and aviation products.

[0004] Literature surveys and studies have shown that the super-hydrophobic properties of linen fabrics have received widespread attention, such as: Chinese invention patent application No. 202020656003.1 discloses a preparation process for antibacterial hydrophobic linen and rayon interwoven fabrics: the antibacterial fabric linen textile line woven from the antibacterial hydrophobic linen main line and the fragrance textile line is intertwined with the antibacterial fabric rayon interwoven line woven from the rayon outer layer structure and the antibacterial fiber to prepare the desired antibacterial hydrophobic linen and rayon interwoven fabric. At present, there are still some shortcomings in the existing hydrophobic linen textile fabrics, such as: when the humidity of the linen textile fabric is high and the ambient temperature is high, the excess water contained in the linen textile fabric is not easy to evaporate and dissipate, and the linen textile fabric textile will not maintain a water balance state, which reduces the comfort of the cotton and linen textile fabric when worn on the body. Therefore, improving the existing technology and developing a linen fabric with excellent super-hydrophobic properties is one of the current development trends. Summary of the invention

[0005] In view of the above-mentioned drawbacks existing in the prior art, the object of the present invention is to provide a super hydrophobic linen fabric and a preparation method thereof.

[0006] The invention aims to provide a super-hydrophobic linen fabric, which has the characteristics of super-hydrophobicity and environmental protection. The fabric can be prepared by the following method: first, a polyacrylic acid coating agent is prepared by using acrylic acid, vinyl-terminated polydimethylsiloxane, butyl acrylate and the like; then, the linen fabric is subjected to coating finishing; finally, the finished linen fabric is subjected to Ar plasma irradiation treatment to obtain the super-hydrophobic linen fabric.

[0007] The object of the present invention is achieved through the following technical solutions:

[0008] A method for preparing a super-hydrophobic linen fabric comprises the following steps:

[0009] (1) Preparation of coating agent: Sodium dodecylbenzene sulfonate, octylphenol polyoxyethylene ether (OP-10), acrylic acid, vinyl-terminated polydimethylsiloxane, butyl acrylate and ammonium persulfate are weighed, and all of the sodium dodecylbenzene sulfonate, octylphenol polyoxyethylene ether (OP-10) and 1 / 3 of the total amount of acrylic acid, vinyl-terminated polydimethylsiloxane, butyl acrylate and ammonium persulfate initiator are dissolved in deionized water, and stirred evenly. The temperature is controlled at 75-85° C. and stirred for 1-2 hours. Then, the remaining 2 / 3 of the acrylic acid, vinyl-terminated polydimethylsiloxane, butyl acrylate and ammonium persulfate initiator are dissolved in deionized water and then added dropwise to the mixed solution just stirred. The dropping time is controlled at 2-3 hours. After the dropping is completed, the mixture is kept warm for 2-3 hours. The coating agent is obtained by leaving the emulsion for one month without stratification or precipitation.

[0010] Preferably, the dosage ratio of the sodium dodecylbenzene sulfonate (g), octylphenol polyoxyethylene ether (OP-10) (g), acrylic acid (mol), vinyl-terminated polydimethylsiloxane (mol), butyl acrylate (mol) and ammonium persulfate (g) is: 1:1-2:0.1-0.2:0.1-0.2:0.1-0.2:0.5-1.

[0011] (2) Coating finishing: Stretch the fabric tightly on the stretcher and evenly apply the coating agent on the fabric with a scraper. The dry weight of the coating is 5-15g / m 2 , drying at 80-90°C for 3-5 minutes, and baking at 110-120°C for 2-4 minutes to obtain the coated linen fabric.

[0012] Preferably, the fabric is linen fabric.

[0013] (3) Post-treatment of linen fabric: The coated linen fabric is placed at a distance of 50 to 100 cm from the plasma spray gun for Ar plasma irradiation treatment to obtain super-hydrophobic linen fabric.

[0014] Preferably, the treatment conditions are: irradiation power 100-200W, irradiation time 10-20min.

[0015] The present invention has the following notable features:

[0016] (1) The coating agent prepared by the present invention contains silicon element, a low surface energy substance, and is attached to the surface of the linen fabric through coating finishing technology.

[0017] (2) The inventors of the present application unexpectedly discovered that by subjecting the coated linen fabric to Ar plasma irradiation treatment, a rough micro-nano structure is formed on the surface of the linen fabric, which significantly enhances the hydrophobicity of the linen fabric.

[0018] (3) The surface of the super-hydrophobic linen fabric prepared by the present invention contains silicon element, a low surface energy substance. The apparent contact angle of water droplets on the linen fabric ranges from 154° to 158°, and it exhibits excellent super-hydrophobicity. After 10 times of washing, the hydrophobicity of the linen fabric is still not significantly weakened.

[0019] (4) After 10 times of washing, the super-hydrophobicity of the super-hydrophobic linen fabric prepared by the present invention is not significantly weakened, which indicates that low surface energy substances can firmly adhere to the surface of the linen fabric.

[0020] (5) The super hydrophobic linen fabric prepared by the present invention has a wide range of raw material sources, a simple preparation process, and has a good market promotion prospect. DETAILED DESCRIPTION

[0021] Source of main raw materials: Vinyl-terminated polydimethylsiloxane (model: 68083-18-1) was purchased from Wuhan Fude Chemical Co., Ltd.

[0022] The following examples and comparative examples illustrate the present invention in detail.

[0023] Example 1

[0024] In this embodiment, a method for preparing a super hydrophobic linen fabric is provided, the method comprising the following steps:

[0025] (1) Preparation of coating agent: 1 g of sodium dodecylbenzene sulfonate, 1.5 g of octylphenol polyoxyethylene ether (OP-10), 0.15 mol of acrylic acid, 0.15 mol of vinyl-terminated polydimethylsiloxane, 0.15 mol of butyl acrylate and 0.75 g of ammonium persulfate were weighed, and all of the sodium dodecylbenzene sulfonate, octylphenol polyoxyethylene ether (OP-10) and 1 / 3 of the total amount of acrylic acid, vinyl-terminated polydimethylsiloxane, butyl acrylate and ammonium persulfate initiator were dissolved in 300 mL of deionized water, and stirred evenly. The temperature was controlled at 80° C. and stirred for 1.5 h. Then, the remaining 2 / 3 of acrylic acid, vinyl-terminated polydimethylsiloxane, butyl acrylate and ammonium persulfate initiator were dissolved in 300 mL of deionized water and added dropwise to the mixed solution just stirred. The dropping time was controlled to be 2.5 h. After the dropping was completed, the mixture was kept warm for 2.5 h. The coating agent was obtained if the emulsion was left for one month without stratification or precipitation.

[0026] (2) Coating finishing: Stretch the linen fabric tightly on the stretcher and evenly apply the coating agent on the fabric with a scraper. The dry weight of the coating is 10g / m 2 , dried at 85°C for 4 minutes, and baked at 115°C for 3 minutes to obtain the coated linen fabric.

[0027] (3) Post-treatment of linen fabric: The coated linen fabric was placed at a distance of 70 cm from the plasma spray gun for Ar plasma irradiation treatment with an irradiation power of 150 W and an irradiation time of 15 min to obtain super-hydrophobic linen fabric a.

[0028] Example 2

[0029] In this embodiment, a method for preparing a super hydrophobic linen fabric is provided, the method comprising the following steps:

[0030] (1) Preparation of coating agent: Weigh 1 g of sodium dodecylbenzene sulfonate, 1.0 g of octylphenol polyoxyethylene ether (OP-10), 0.1 mol of acrylic acid, 0.1 mol of vinyl-terminated polydimethylsiloxane, 0.1 mol of butyl acrylate and 0.5 g of ammonium persulfate, dissolve all of the sodium dodecylbenzene sulfonate, octylphenol polyoxyethylene ether (OP-10) and 1 / 3 of the total amount of acrylic acid, vinyl-terminated polydimethylsiloxane, butyl acrylate and ammonium persulfate initiator in 300 mL of deionized water, stir evenly, control the temperature to 75° C., and stir for 1 hour; then, dissolve the remaining 2 / 3 of acrylic acid, vinyl-terminated polydimethylsiloxane, butyl acrylate and ammonium persulfate initiator in 300 mL of deionized water and add dropwise to the mixed solution just stirred, the dropping time is controlled to 2 hours, and after the dropping is completed, keep warm for 2 hours; the emulsion is left for one month, and the coating agent is obtained if no stratification or precipitation occurs.

[0031] (2) Coating finishing: Stretch the linen fabric tightly on the stretcher and evenly apply the coating agent on the fabric with a scraper. The dry weight of the coating is 5g / m 2 , dried at 80°C for 3 minutes, and baked at 110°C for 2 minutes to obtain the coated linen fabric.

[0032] (3) Post-treatment of linen fabric: The coated linen fabric was placed at a distance of 50 cm from the plasma spray gun for Ar plasma irradiation treatment with an irradiation power of 100 W and an irradiation time of 10 min to obtain super-hydrophobic linen fabric b.

[0033] Example 3

[0034] In this embodiment, a method for preparing a super hydrophobic linen fabric is provided, the method comprising the following steps:

[0035] (1) Preparation of coating agent: Weigh 1 g of sodium dodecylbenzene sulfonate, 2 g of octylphenol polyoxyethylene ether (OP-10), 0.2 mol of acrylic acid, 0.2 mol of vinyl-terminated polydimethylsiloxane, 0.2 mol of butyl acrylate and 1 g of ammonium persulfate, dissolve all of the sodium dodecylbenzene sulfonate, octylphenol polyoxyethylene ether (OP-10) and 1 / 3 of the total amount of acrylic acid, vinyl-terminated polydimethylsiloxane, butyl acrylate and ammonium persulfate initiator in 300 mL of deionized water, stir evenly, control the temperature to 85° C., and stir for 2 h; then, dissolve the remaining 2 / 3 of acrylic acid, vinyl-terminated polydimethylsiloxane, butyl acrylate and ammonium persulfate initiator in 300 mL of deionized water and add dropwise to the mixed solution just stirred, the dropping time is controlled to 3 h, and after the dropping is completed, keep the temperature for 3 h. The coating agent can be obtained by leaving the emulsion for one month without stratification or precipitation.

[0036] (2) Coating finishing: Stretch the linen fabric tightly on the stretcher and evenly apply the coating agent on the fabric with a scraper. The dry weight of the coating is 15g / m 2 , dried at 90°C for 5 minutes, and baked at 120°C for 4 minutes to obtain the coated linen fabric.

[0037] (3) Post-treatment of linen fabric: The coated linen fabric was placed at a distance of 100 cm from the plasma spray gun for Ar plasma irradiation treatment with an irradiation power of 200 W and an irradiation time of 20 min to obtain super-hydrophobic linen fabric c.

[0038] Comparative Example A

[0039] Taking Example 1 as a comparison, in this comparative example, the "vinyl-terminated polydimethylsiloxane" in step (1) is not selected, that is, the "vinyl-terminated polydimethylsiloxane" in step (1) is replaced with "styrene", and the other preparation methods are implemented according to the preparation method of Example 1 to obtain linen fabric d.

[0040] Comparative Example B

[0041] In contrast to Example 1, in this comparative example, the coating amount was changed, that is, the coating amount in step (2) was changed to 10 g / m 2 "Change to "Coating weight dry weight is 50g / m 2 ", the other preparation methods were implemented according to the preparation method of Example 1 to obtain linen fabric e.

[0042] Comparative Example C

[0043] Taking Example 1 as a comparison, in this comparative example, the irradiation power and time were changed, that is, the "irradiation power 150 W, irradiation time 15 min" in step (3) was changed to "irradiation power 15 W, irradiation time 3 min", and the other preparation methods were implemented according to the preparation method of Example 1 to obtain linen fabric f.

[0044] Super hydrophobic performance test:

[0045] In order to better detect the super-hydrophobicity of the super-hydrophobic linen fabric prepared in the present invention, the linen fabrics a, b, c, d, e, and f prepared in the above-mentioned specific embodiments 1 to 3 and comparative examples A to C of the present invention are selected. The apparent contact angle of a water drop on the surface of the super-hydrophobic linen fabric is measured using an XG-CAMA1 basic contact angle tester, and no less than 30 test samples are tested, and the test average value is taken. The fabric to be tested is subjected to standard washing with reference to the washing method of the washing color fastness tester of GB / T20944.1-2007, and the super-hydrophobicity of the initial sample and the sample after washing 10 times is tested. The test results are shown in Table 1.

[0046] Table 1 Apparent contact angles of water droplets on linen fabrics a, b, c, d, e, and f

[0047]

[0048] As can be seen from Table 1, when not washed, the apparent contact angle of water droplets on linen fabrics a, b, and c ranges from 154° to 158° respectively; after 10 washings, the hydrophobic properties of fabrics a, b, and c are still not significantly weakened. Generally, when the apparent contact angle is greater than 150°, it means that the fabric has super-hydrophobicity. It can be considered that the super-hydrophobic linen fabric prepared by the present invention has super-hydrophobicity. The super-hydrophobicity of linen fabrics d, e, and f prepared by comparative examples AC is significantly poor, which shows that the selection of vinyl-terminated polydimethylsiloxane, coating amount, irradiation power, and time all have an important influence on the super-hydrophobicity of linen fabrics.

Claims

1. A method for preparing a super hydrophobic linen fabric, characterized in that: The preparation method comprises the following steps: (1) Preparation of coating agent: sodium dodecylbenzene sulfonate, octylphenol polyoxyethylene ether (OP-10), acrylic acid, vinyl-terminated polydimethylsiloxane, butyl acrylate and ammonium persulfate are weighed, and all of the sodium dodecylbenzene sulfonate, octylphenol polyoxyethylene ether (OP-10) and 1 / 3 of the total amount of acrylic acid, vinyl-terminated polydimethylsiloxane, butyl acrylate and ammonium persulfate initiator are dissolved in deionized water, and stirred evenly, and the temperature is controlled at 75-85° C. and stirred for 1-2 hours; then, the remaining 2 / 3 of acrylic acid, vinyl-terminated polydimethylsiloxane, butyl acrylate and ammonium persulfate initiator are dissolved in deionized water and added dropwise to the mixed solution just stirred, and the dropping time is controlled to be 2-3 hours. After the dropping is completed, the mixture is kept warm for 2-3 hours. The coating agent is obtained if the emulsion is left for one month without stratification or precipitation; (2) Coating finishing: Stretch the fabric tightly on the stretcher and evenly apply the coating agent on the fabric with a scraper. The dry weight of the coating is 5-15g / m 2 , drying at 80-90°C for 3-5 minutes, and baking at 110-120°C for 2-4 minutes to obtain a coated linen fabric; (3) Post-treatment of linen fabric: The coated linen fabric is placed at a distance of 50 to 100 cm from the plasma spray gun for Ar plasma irradiation treatment to obtain super-hydrophobic linen fabric.

2. The method for preparing a super hydrophobic linen fabric according to claim 1, characterized in that: The amount ratio of sodium dodecylbenzene sulfonate, octylphenol polyoxyethylene ether (OP-10), acrylic acid, vinyl-terminated polydimethylsiloxane, butyl acrylate and ammonium persulfate in step (1) is: 1g: (1-2)g: (0.1-0.2)mol: (0.1-0.2)mol: (0.1-0.2)mol: (0.5-1)g.

3. The method for preparing a super hydrophobic linen fabric according to claim 1, characterized in that: The fabric described in step (2) is suitable for linen fabric.

4. The method for preparing a super hydrophobic linen fabric according to claim 1, characterized in that: The treatment conditions in step (3) are: irradiation power 100-200W, irradiation time 10-20min.

5. A super hydrophobic linen fabric, characterized in that: The invention is prepared by the method according to any one of claims 1 to 4.

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