Super-hydrophobic polyester fabric and preparation method thereof

Abstract

The invention relates to a super-hydrophobic polyester fabric and a preparation method thereof. The fabric can be prepared by adopting the following method: firstly, performing plasma irradiation treatment on the polyester fabric; then, immersing the polyester fabric into absolute ethyl alcohol containing a curing agent; secondly, polystyrene is dissolved in the solvent on the surface of the polyester fabric; finally, the polyester fabric is dried, and the super-hydrophobic polyester fabric is prepared. The surface of the prepared super-hydrophobic polyester fabric contains a low-surface-energy substance silicon element, the apparent contact angle range of water drops on the polyester fabric ranges from 154 degrees to 157 degrees, and the super-hydrophobic polyester fabric shows good super-hydrophobicity; after 10 times of water washing, the hydrophobic property of the polyester 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 polyester fabric and a preparation method thereof. Background Art

[0002] As people's quality of life improves, the choice of textiles has become more targeted. Superhydrophobicity is closely related to the textile industry. Scientists have tried a lot of methods to give fabrics superhydrophobicity. For example, the dip coating method is used to modify the fabric to make it superhydrophobic (contact angle>150°), which can improve the anti-fouling ability of the fabric and achieve efficient oil-water separation.

[0003] Polyester fiber has the advantages of high modulus, high strength, high elasticity, good shape retention and heat resistance, and has become the most widely used and consumed fiber variety. Polyester fabric woven from polyester fiber is a very common chemical fiber clothing fabric used in daily life. Its biggest advantage is its good wrinkle resistance and shape retention. Therefore, it is suitable for making outerwear, various bags, tents and other outdoor products. As a major polyester producer, my country has great application prospects in the production and life of preparing high-performance super-hydrophobic polyester fabrics.

[0004] Literature research shows that the super-hydrophobic properties of polyester fabrics have received widespread attention. For example, Chinese invention patent application No. 202110449547.X discloses a method for preparing super-hydrophobic polyester fabrics based on thiol-ene click reaction: the present invention immerses the polyester fabric adhered with polyphenol in a solution containing multivalent metal ions to obtain a fabric with a surface modified by metal particles, and then places the fabric in a solution containing alkylthiols and photosensitizers. Under ultraviolet light, the photosensitizer triggers the alkylthiols and polyphenols to undergo a thiol-ene click chemical reaction, and a super-hydrophobic polyester fabric is obtained by a click chemistry method; Chinese invention patent application No. 202110449547.X discloses a method for preparing super-hydrophobic polyester fabrics based on thiol-ene click reaction: the present invention immerses the polyester fabric adhered with polyphenols in a solution containing multivalent metal ions to obtain a fabric with a surface modified by metal particles, and then places the fabric in a solution containing alkylthiols and photosensitizers. Under ultraviolet light, the photosensitizer triggers the alkylthiols and polyphenols to undergo a thiol-ene click chemical reaction, and a super-hydrophobic polyester fabric is obtained by a click chemistry method; 0306004.2 discloses a method for preparing a washable self-repairing super-hydrophobic polyester fabric: This application uses silicone oil mist to treat polyester yarn, and uses PU coating to treat polyester grey cloth, so that the polyester fabric has a good self-repairing function, and treats the polyester fabric with argon plasma and super-hydrophobic functional finishing liquid to make the polyester fabric have a good super-hydrophobic function, and treats the polyester fabric with an ethanol solution of tridecafluorooctyl triethoxysilane to make the polyester fabric have a good wash-resistant function, which is convenient to meet people's use needs. The super-hydrophobic polyester fabric prepared by the above method still has some problems, such as: the preparation process of super-hydrophobic materials is complicated, the preparation time is long, and it is difficult to mass produce; and there may be environmental pollution problems in the preparation process.

[0005] Therefore, improving the existing technology to obtain a super-hydrophobic polyester fabric preparation process with mild reaction conditions, fast reaction, low material cost, simple experimental process and environmental protection is one of the current researchers' unremitting goals. Summary of the invention

[0006] In view of the above-mentioned drawbacks existing in the prior art, the object of the present invention is to provide a super-hydrophobic polyester fabric and a preparation method thereof.

[0007] The purpose of the present invention is to provide a super-hydrophobic polyester fabric, which has the characteristics of super-hydrophobicity, antibacterial, environmental protection, etc.; the fabric can be prepared by the following method: first, the polyester fabric is subjected to plasma irradiation treatment; then, the polyester fabric is immersed in anhydrous ethanol containing a curing agent; secondly, polystyrene is dissolved in a solvent on the surface of the polyester fabric; finally, the polyester fabric is dried to obtain the super-hydrophobic polyester fabric.

[0008] The object of the present invention is achieved through the following technical solutions:

[0009] A method for preparing a super-hydrophobic polyester fabric comprises the following steps:

[0010] (1) Pretreatment of polyester fabric: The polyester fabric was placed at a distance of 50 to 70 cm from the plasma spray gun for Ar plasma irradiation treatment.

[0011] Preferably, the treatment conditions are: irradiation power 50-100W, irradiation time 5-10min.

[0012] (2) Pretreatment of polyester fabric: At room temperature, immerse the polyester fabric treated in step (1) in anhydrous ethanol containing a curing agent.

[0013] Preferably, the dosage ratio of the polyester fabric to the anhydrous ethanol containing the curing agent is 1 g: (100-200) mL; the dosage ratio of the curing agent to the anhydrous ethanol containing the curing agent is 1 mL: (100-200) mL; and the immersion time is 15-25 min.

[0014] Preferably, the curing agent is 1,2-diaminocyclohexane.

[0015] (3) Hydrophobic finishing: The polyester fabric treated in step (2) is taken out and quickly placed in a closed system, polystyrene is placed in a crucible and heated to vaporize it, and the vaporized steam is dissolved in the solvent on the surface of the polyester fabric.

[0016] Preferably, the vaporization time is 15 to 25 minutes.

[0017] Preferably, the usage ratio of the polyester fabric to polystyrene is 1:(0.001-0.003).

[0018] (4) Post-treatment: Drying the polyester fabric treated in step (3) in an ultrasonic environment to obtain a super-hydrophobic polyester fabric.

[0019] Preferably, the frequency of the ultrasonic wave is 4-6Mz, and the sound intensity is 30-50W / cm 2 .

[0020] Preferably, the drying temperature is 40-60° C., and the drying time is 60-90 min.

[0021] The present invention has the following notable features:

[0022] (1) Polystyrene is a material with good hydrophobic properties, but it is difficult to use it for hydrophobic finishing of textile fabrics. The inventors of the present application unexpectedly discovered that polystyrene can be dissolved in the surface of polyester fabric soaked in anhydrous ethanol containing a curing agent by using vapor deposition technology, and polystyrene can be solidified on the surface of polyester fabric by ultrasonic drying; the hydrophobic properties of the polyester fabric surface are significantly enhanced; it is further discovered that the treated polyester fabric still exhibits obvious hydrophobicity after multiple washings.

[0023] (2) The inventors of the present application unexpectedly discovered that Ar is an inert gas. After being treated with Ar plasma, the surface of the polyester fabric will be etched, the fiber specific surface area will increase, and the surface roughness will be significantly enhanced, which is beneficial to the improvement of its hydrophobicity.

[0024] (3) The surface of the super-hydrophobic polyester fabric prepared by the present invention contains silicon element, a low surface energy substance. The apparent contact angle of water droplets on the polyester fabric ranges from 154° to 157°, and it exhibits excellent super-hydrophobicity. After 10 times of washing, the hydrophobicity of the polyester fabric is still not significantly weakened.

[0025] (4) After 10 times of washing, the super-hydrophobic property of the super-hydrophobic polyester fabric prepared by the present invention is not significantly weakened, which indicates that polystyrene can be firmly attached to the surface of the polyester fabric.

[0026] (5) The super-hydrophobic polyester 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

[0027] The following examples and comparative examples illustrate the present invention in detail.

[0028] Example 1

[0029] In this embodiment, a method for preparing a super-hydrophobic polyester fabric is provided, and the preparation method comprises the following steps:

[0030] (1) Pretreatment of polyester fabric: The polyester fabric was placed at a distance of 60 cm from the plasma spray gun for Ar plasma irradiation treatment with an irradiation power of 75 W and an irradiation time of 7.5 min.

[0031] (2) Pretreatment of polyester fabric: At room temperature, 1 kg of the polyester fabric treated in step (1) was immersed in 150 L of anhydrous ethanol containing 1,2-diaminocyclohexane, wherein the ratio of 1,2-diaminocyclohexane to anhydrous ethanol in the anhydrous ethanol containing 1,2-diaminocyclohexane was 1:150, and the immersion time was 20 min.

[0032] (3) Hydrophobic finishing: The polyester fabric treated in step (2) is taken out and quickly placed in a closed system, and polystyrene is placed in a crucible and heated, with the ratio of polyester fabric to polystyrene being 1:0.002, so that it is vaporized for 20 minutes, and the vaporized steam is dissolved in the solvent on the surface of the polyester fabric.

[0033] (4) Post-processing: In an ultrasonic environment, the frequency of the ultrasonic wave is 5Mz and the sound intensity is 40W / cm 2 The polyester fabric prepared in step (3) is dried at a drying temperature of 50° C. for 75 min to obtain a super-hydrophobic polyester fabric.

[0034] Example 2

[0035] In this embodiment, a method for preparing a super-hydrophobic polyester fabric is provided, and the preparation method comprises the following steps:

[0036] (1) Pretreatment of polyester fabric: The polyester fabric was placed at a distance of 50 cm from the plasma spray gun for Ar plasma irradiation treatment with an irradiation power of 50 W and an irradiation time of 5 min.

[0037] (2) Pretreatment of polyester fabric: At room temperature, 1 kg of the polyester fabric treated in step (1) was immersed in 100 L of anhydrous ethanol containing 1,2-diaminocyclohexane, wherein the ratio of 1,2-diaminocyclohexane to anhydrous ethanol in the anhydrous ethanol containing 1,2-diaminocyclohexane was 1:100, and the immersion time was 15 min.

[0038] (3) Hydrophobic finishing: The polyester fabric treated in step (2) is taken out and quickly placed in a closed system, and polystyrene is placed in a crucible and heated, with the ratio of polyester fabric to polystyrene being 1:0.001, and vaporized for 15 minutes. The vaporized steam dissolves in the solvent on the surface of the polyester fabric.

[0039] (4) Post-processing: In an ultrasonic environment, the frequency of the ultrasonic wave is 4Mz and the sound intensity is 30W / cm 2The polyester fabric prepared in step (3) is dried at a temperature of 40° C. for 60 min to obtain a super-hydrophobic polyester fabric.

[0040] Example 3

[0041] In this embodiment, a method for preparing a super-hydrophobic polyester fabric is provided, and the preparation method comprises the following steps:

[0042] (1) Pretreatment of polyester fabric: The polyester fabric was placed at a distance of 70 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.

[0043] (2) Pretreatment of polyester fabric: At room temperature, 1 kg of the polyester fabric treated in step (1) was immersed in 200 L of anhydrous ethanol containing 1,2-diaminocyclohexane, wherein the ratio of 1,2-diaminocyclohexane to anhydrous ethanol in the anhydrous ethanol containing 1,2-diaminocyclohexane was 1:200, and the immersion time was 25 min.

[0044] (3) Hydrophobic finishing: The polyester fabric treated in step (2) is taken out and quickly placed in a closed system, and polystyrene is placed in a crucible and heated, with the ratio of polyester fabric to polystyrene being 1:0.003, to vaporize it, and the vaporization time is 25 minutes. The vaporized steam dissolves in the solvent on the surface of the polyester fabric.

[0045] (4) Post-processing: In an ultrasonic environment, the frequency of the ultrasonic wave is 6Mz and the sound intensity is 50W / cm 2 The polyester fabric prepared in step (3) is dried at a drying temperature of 60° C. for 90 min to obtain a super-hydrophobic polyester fabric.

[0046] Comparative Example A

[0047] Taking Example 1 as a comparison, in this comparative example, the polyester fabric is not pretreated, that is, the step “(1) pretreatment of the polyester fabric” is deleted, and the other preparation methods are implemented according to the preparation method of Example 1.

[0048] Comparative Example B

[0049] Taking Example 1 as a comparison, in this comparative example, the curing agent is changed, that is, "1,2-diaminocyclohexane" in step (2) is replaced by "cyclohexane", and the other preparation methods are implemented according to the preparation method of Example 1.

[0050] Comparative Example C

[0051] Taking Example 1 as a comparison, in this comparative example, the vaporization time is shortened, that is, the "vaporization time is 20 min" in step (3) is changed to "vaporization time is 2 min", and the other preparation methods are implemented according to the preparation method of Example 1.

[0052] Super hydrophobic performance test:

[0053] In order to better detect the super-hydrophobicity of the super-hydrophobic polyester fabric prepared in the present invention, the polyester fabrics a, b, c, d, e, f prepared in the above-mentioned specific embodiments 1 to 3 and comparative examples A to C of the present invention and the purchased super-hydrophobic polyester fabric (purchased from Shanghai Weiren Wool Textile Co., Ltd.) were selected. The apparent contact angle of water droplets on the surface of the super-hydrophobic polyester fabric was measured using an XG-CAMA1 basic contact angle tester, and no less than 30 test samples were tested, and the test average value was taken. The fabric to be tested was subjected to standard washing with reference to the washing method of the washing color fastness tester of GB / T20944.1-2007, and the super-hydrophobic performance of the initial sample and the sample after washing 10 times was tested. The test results are shown in Table 1.

[0054] Table 1 Apparent contact angles of water droplets on polyester fabrics a, b, c, d, e, f prepared in Examples 1 to 3 and Comparative Examples A to C and purchased super-hydrophobic polyester fabrics

[0055]

[0056] As can be seen from Table 1, when the polyester fabric is not washed, the apparent contact angle of the water droplets on the polyester fabrics a, b, and c prepared in Examples 1 to 3 ranges from 154° to 157°, which is close to the apparent contact angle of the purchased super-hydrophobic polyester fabric; after 10 times of washing, the hydrophobic properties of fabrics a, b, and c are still not significantly weakened; therefore, it can be considered that the polyester fabric prepared by the present invention has super-hydrophobicity. The super-hydrophobicity of polyester fabrics d, e, and f prepared in Comparative Examples AC is significantly poor, which indicates that the pretreatment of the polyester fabric, the selection of the curing agent, and the vaporization time all have an important influence on the super-hydrophobicity of the polyester fabric.

Claims

1. A method for preparing a super-hydrophobic polyester fabric, characterized in that: The preparation method comprises the following steps: (1) Pretreatment of polyester fabric: Place the polyester fabric at a distance of 50 to 70 cm from the plasma spray gun and irradiate it with Ar plasma; (2) Pretreatment of polyester fabric: Immerse the polyester fabric treated in step (1) in anhydrous ethanol containing a curing agent at room temperature; (3) Hydrophobic finishing: The polyester fabric treated in step (2) is taken out and quickly placed in a closed system, polystyrene is placed in a crucible and heated to vaporize it, and the vaporized steam is dissolved in the solvent on the surface of the polyester fabric; (4) Post-treatment: Drying the polyester fabric treated in step (3) in an ultrasonic environment to obtain a super-hydrophobic polyester fabric.

2. The method for preparing a super-hydrophobic polyester fabric according to claim 1, wherein: The treatment conditions in step (1) are: irradiation power is 50-100W, and irradiation time is 5-10min.

3. The method for preparing a super-hydrophobic polyester fabric according to claim 1, characterized in that: In step (2), the dosage ratio of the polyester fabric to the anhydrous ethanol containing the curing agent is 1 g: (100-200) mL; the dosage ratio of the curing agent to the anhydrous ethanol in the anhydrous ethanol containing the curing agent is 1 mL: (100-200) mL; the immersion time is 15-25 min; and the curing agent is 1,2-diaminocyclohexane.

4. The method for preparing a super-hydrophobic polyester fabric according to claim 1, characterized in that: The vaporization time in step (3) is 15 to 25 minutes; the dosage ratio of the polyester fabric to the polystyrene is 1 g: (0.001 to 0.003) g.

5. The method for preparing a super-hydrophobic polyester fabric according to claim 1, characterized in that: The frequency of the ultrasonic wave in step (4) is 4-6Mz, and the sound intensity is 30-50W / cm 2 ; The drying temperature is 40-60°C and the drying time is 60-90min.

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

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