Super-hydrophobic polyester fabric and preparation method thereof

Abstract

The present application relates to a kind of super-hydrophobic polyester fabric and its preparation method.The fabric can be prepared by the following method: first, polyester fabric is carried out plasma irradiation pretreatment;Second, 2-(perfluorooctyl) ethyl methacrylate and ammonium persulfate are prepared into finishing liquor;Finally, polyester fabric is reacted in finishing liquor, and super-hydrophobic polyester fabric is prepared.The super-hydrophobic polyester fabric prepared by the present application contains low surface energy substance fluorine element on the surface, and the apparent contact angle of water droplet on the surface of polyester fabric ranges between 153°-158°, which shows good super-hydrophobicity;After 10 times washing, the hydrophobic property of polyester fabric is still not obviously weakened.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fabric preparation, and particularly relates to a super-hydrophobic polyester fabric and a preparation method thereof. BACKGROUND

[0002] In recent years, the way of performing biomimetic super-hydrophobic finishing on the surface of textiles has attracted much attention. The hydrophobic finishing of fabrics plays a very important role in improving the added value of textiles and improving the self-cleaning and anti-pollution performance of fabrics. At present, there are mainly two methods for preparing super-hydrophobic fabrics: (1) constructing micro / nano roughness on the surface of the substrate; (2) introducing low surface energy substances to the surface of the substrate to reduce the surface energy of the substrate.

[0003] The polyester fabric is woven from polyester fibers. As one of the three synthetic fibers in the world, polyester has simple synthetic processing technology, excellent physical and chemical properties, low price, and the products have the characteristics of being durable, easy to wash and dry, and easy to care, and have a wide application prospect in production and life. The super-hydrophobic finishing of polyester fabric has been widely concerned, and its products are widely used in industrial textiles, chef's uniforms, interior decoration of transportation tools, and protective clothing, etc.

[0004] According to the literature research, the super-hydrophobic performance of polyester fabric has attracted widespread attention. For example, Chinese invention patent application No. 201810827866.8 discloses a preparation method of plasma-assisted super-hydrophobic polyester fabric: the washed and dried polyester fabric is subjected to dielectric barrier discharge atmospheric plasma modification treatment. The polyester fabric is fully immersed in a pre-hydrolyzed fluorosilane finishing liquid, and is subjected to liquid padding, and is baked in an oven to obtain the final product. Chinese invention patent application No. 202110220467.7 discloses a hydrophobic polyester fiber and a preparation method thereof: graphene oxide is prepared, and the graphene oxide and organosilane are dispersed in an organic solvent to obtain a dispersion liquid; the dispersion liquid is heated and mixed to obtain an immersion solution; the polyester fiber is immersed in an alkali solution and heated to obtain a pretreated polyester fiber; the pretreated polyester fiber is completely immersed in the immersion solution and is left to stand to obtain a soaked fiber; and the soaked fiber is subjected to plasma treatment to obtain a hydrophobic polyester fiber.

[0005] Super-hydrophobic polyester fabric has excellent self-cleaning, anti-icing, drag reduction, anti-corrosion and other functions, and has important application value in the fields of industry, military, biomedicine, etc. However, the current super-hydrophobic fabric still has defects such as complex preparation process and long preparation time, which limits its practical application. Therefore, how to obtain a polyester fabric with good hydrophobicity is a technical problem to be solved in the field. SUMMARY

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

[0007] The present application aims to provide a super-hydrophobic polyester fabric, which has the characteristics of super-hydrophobicity, antibiosis, environmental protection, etc.

[0008] The purpose of the present application is achieved by the following technical solutions:

[0009] A preparation method of a super-hydrophobic polyester fabric, comprising the following steps:

[0010] (1) Pretreatment of the polyester fabric: place the polyester fabric at a distance of 50-100 cm from the mouth of an argon plasma spray gun for argon plasma irradiation treatment.

[0011] Preferably, the treatment conditions are: irradiation power 100-200 W, irradiation time 10-20 min.

[0012] (2) Preparation of a finishing liquid: dissolve 2-(perfluorooctyl) ethyl methacrylate in a dimethylformamide solution to obtain solution a; dissolve ammonium persulfate in a tap water solution to obtain solution b; uniformly stir solution a and solution b in an ethanol aqueous solution to obtain the finishing liquid.

[0013] Preferably, the use amount ratio of 2-(perfluorooctyl) ethyl methacrylate to dimethylformamide solution in solution a is 1 mL:(30-50) mL.

[0014] Preferably, the use amount ratio of ammonium persulfate to tap water in solution b is 1 g:(20-40) mL.

[0015] Preferably, the use amount ratio of solution a, solution b and the ethanol aqueous solution is 1:(0.2-0.4):(2-4).

[0016] Preferably, the volume fraction of the ethanol aqueous solution is 30%-50%.

[0017] (3) Super-hydrophobic finishing: under microwave conditions, immerse the polyester fabric treated in step (1) in the finishing liquid prepared in step (2), adjust the temperature of the finishing liquid, and perform reaction; after the reaction is completed, wash and dry the polyester fabric to obtain the super-hydrophobic polyester fabric.

[0018] Preferably, the use amount ratio of the polyester fabric to the finishing liquid is 1 g:(30-50) mL.

[0019] Preferably, the temperature of the finishing liquid is 70-80℃.

[0020] Preferably, the reaction time is 60-90 minutes.

[0021] Preferably, the output power of the microwave is 300-400W.

[0022] The reaction mechanism analysis of the present application: 2-(perfluorooctyl) ethyl methacrylate contains low surface energy substance fluorine element, which is a better hydrophobic material; however, it has difficulty in reacting with polyester fabric. The inventors of the present application accidentally found that under the assistance of microwave, 2-(perfluorooctyl) ethyl methacrylate can occur polymerization reaction with polyester fiber. Finally, 2-(perfluorooctyl) ethyl methacrylate is grafted on the surface of polyester fabric, and the hydrophobicity of the polyester fabric is improved.

[0023] The present application has the following remarkable features:

[0024] (1) 2-(perfluorooctyl) ethyl methacrylate contains low surface energy substance fluorine element, but it is difficult to be applied to the surface of the fabric. The inventors of the present application accidentally found that under the assistance of microwave, 2-(perfluorooctyl) ethyl methacrylate can occur polymerization reaction with polyester fiber, and is grafted on the surface of the polyester fabric. The hydrophobicity of the grafted polyester fabric surface is obviously enhanced.

[0025] (2) The inventors of the present application accidentally found that after the treatment of the polyester fabric by plasma irradiation, the roughness of the surface of the polyester fabric is obviously improved, which is conducive to the improvement of the hydrophobicity of the polyester fabric.

[0026] (3) The super-hydrophobic polyester fabric prepared by the present application contains low surface energy substance fluorine element on the surface, and the apparent contact angle of water droplets on the surface of the polyester fabric is in the range of 153°-158°, which exhibits good super-hydrophobicity. After 10 times of washing, the hydrophobicity of the polyester fabric is still not obviously weakened.

[0027] (4) The super-hydrophobic polyester fabric prepared by the present application is not obviously weakened in super-hydrophobicity after 10 times of washing, which indicates that the low surface energy substance is firmly attached to the surface of the polyester fabric.

[0028] (5) The super-hydrophobic polyester fabric prepared by the present application has a wide source of raw materials, a simple preparation process, and good market promotion prospects. DETAILED DESCRIPTION

[0029] The following examples and comparative examples illustrate the present application in detail.

[0030] Example 1:

[0031] In the present embodiment, a preparation method of super-hydrophobic polyester fabric, the preparation method comprising the following steps:

[0032] (1) Pretreatment of polyester fabric: place the polyester fabric at a distance of 75 cm from the mouth of the plasma spray gun for Ar plasma irradiation treatment, irradiation power 150 W, irradiation time 15 min.

[0033] (2) Preparation of finishing liquid: dissolve 10 mL of 2-(perfluorooctyl) ethyl methacrylate in 400 mL of dimethylformamide solution to obtain solution a; dissolve 10 g of ammonium persulfate in 300 mL of tap water solution to obtain solution b; dissolve 100 mL of solution a and 30 mL of solution b in 300 mL of 40% ethanol aqueous solution, and uniformly stir to obtain the finishing liquid.

[0034] (3) Super-hydrophobic finishing: under microwave conditions, microwave output power is 350 W, immerse 10 g of polyester fabric treated in step (1) in 400 mL of finishing liquid prepared in step (2), control the temperature of the finishing liquid to be 75℃, and carry out reaction for 75 minutes; after the reaction is completed, wash and dry the polyester fabric to obtain super-hydrophobic polyester fabric.

[0035] Example 2:

[0036] In the present embodiment, a preparation method of super-hydrophobic polyester fabric, the preparation method comprising the following steps:

[0037] (1) Pretreatment of polyester fabric: place the polyester fabric at a distance of 75 cm from the mouth of the plasma spray gun for Ar plasma irradiation treatment, irradiation power 150 W, irradiation time 15 min.

[0038] (2) Preparation of finishing liquid: dissolve 10 mL of 2-(perfluorooctyl) ethyl methacrylate in 400 mL of dimethylformamide solution to obtain solution a; dissolve 10 g of ammonium persulfate in 300 mL of tap water solution to obtain solution b; dissolve 100 mL of solution a and 30 mL of solution b in 300 mL of 40% ethanol aqueous solution, and uniformly stir to obtain the finishing liquid.

[0039] (3) Super-hydrophobic finishing: under microwave conditions, microwave output power is 350 W, immerse 10 g of polyester fabric treated in step (1) in 400 mL of finishing liquid prepared in step (2), control the temperature of the finishing liquid to be 75℃, and carry out reaction for 75 minutes; after the reaction is completed, wash and dry the polyester fabric to obtain super-hydrophobic polyester fabric.

[0040] Example 3:

[0041] In the embodiment, a preparation method of super-hydrophobic polyester fabric comprises the following steps:

[0042] (1) Pretreatment of polyester fabric: the polyester fabric is placed at a distance of 100 cm from the mouth of the plasma jet gun for Ar plasma irradiation treatment, the irradiation power is 200 W, and the irradiation time is 20 min.

[0043] (2) Preparation of finishing solution: 10 mL of 2-(perfluorooctyl) ethyl methacrylate is dissolved in 500 mL of dimethylformamide solution to prepare solution a; 10 g of ammonium persulfate is dissolved in 400 mL of tap water solution to prepare solution b; 100 mL of solution a and 40 mL of solution b are dissolved in 400 mL of 50% ethanol aqueous solution, and uniform stirring is performed to prepare the finishing solution.

[0044] (3) Super-hydrophobic finishing: under microwave conditions, 10 g of the polyester fabric treated in step (1) is immersed in 500 mL of the finishing solution prepared in step (2), the temperature of the finishing solution is regulated to 80 ℃, the reaction is performed, and the reaction time is 90 min; after the reaction is completed, the polyester fabric is washed with water and dried to obtain the super-hydrophobic polyester fabric.

[0045] Comparative Example A

[0046] In comparison with Example 1, in the comparative example, the polyester fabric is not pretreated, that is, step (1) is not performed, and the other preparation methods are performed according to the preparation method of Example 1.

[0047] Comparative Example B

[0048] In comparison with Example 1, in the comparative example, the microwave is not performed, that is, the step (3) “under microwave conditions, the microwave output power is 350 W” is deleted, and the other preparation methods are performed according to the preparation method of Example 1.

[0049] Super-hydrophobic performance test:

[0050] In order to better detect the super-hydrophobicity of the super-hydrophobic polyester fabric prepared in the application, the super-hydrophobic polyester fabrics a, b, c, d and e prepared in the above specific embodiments 1-3 and comparative examples A-B in the application are selected. The apparent contact angle of water droplets on the surface of the super-hydrophobic polyester fabric is measured by using an XG-CAMA1 basic type contact angle tester, the test samples are not less than 30, and the average value is taken. The super-hydrophobic performance of the initial sample and the sample after 10 times of washing is tested according to the standard washing method of GB / T20944.1-2007 color fastness to washing test machine, and the test results are shown in Table 1.

[0051] Table 1 apparent contact angle of water droplets on the polyester fabrics a, b, c, d, e prepared in Examples 1-3 and Comparative Examples A-B

[0052] apparent contact angle (°) a b c d e no water wash 157.4 153.7 156.5 96.3 86.5 water wash 10 times 145.7 146.9 143.8 72.4 60.8

[0053] As shown in Table 1, the apparent contact angle of water droplets on the polyester fabrics a, b, c prepared in Examples 1-3 ranges from 153° to 158° when the polyester fabrics are not washed. After 10 times of washing, the hydrophobic property of the fabrics a, b, c is still not obviously weakened. It can be considered that the polyester fabric prepared in the present application has super hydrophobicity. The super hydrophobicity of the super hydrophobic polyester fabrics d, e prepared in Comparative Examples A-B is obviously poor, which indicates that the pretreatment and microwave implementation of the polyester fabric have important influence on the super hydrophobic property of the polyester fabric.

Claims

1. A method for preparing a superhydrophobic polyester fabric, characterized in that, The preparation method comprises the following steps: (1) Pretreatment of the polyester fabric: place the polyester fabric at a distance of 50-100 cm from the mouth of the plasma spray gun for Ar plasma irradiation treatment; (2) Preparation of the finishing liquid: dissolve 2-(perfluorooctyl) ethyl methacrylate in a dimethylformamide solution to obtain solution a; dissolve ammonium persulfate in a tap water solution to obtain solution b; uniformly stir solution a and solution b in an ethanol aqueous solution to obtain the finishing liquid; (3) Super-hydrophobic finishing: under microwave conditions, immerse the polyester fabric treated in step (1) in the finishing liquid prepared in step (2), adjust the temperature of the finishing liquid, and perform reaction; after the reaction is completed, wash and dry the polyester fabric to obtain super-hydrophobic polyester fabric.

2. The method according to claim 1, wherein, In step (1), the treatment conditions are: irradiation power 100-200 W, irradiation time 10-20 min.

3. The method according to claim 1, wherein, In step (2), the use amount ratio of 2-(perfluorooctyl) ethyl methacrylate to dimethylformamide in solution a is 1 mL:(30-50) mL; the use amount ratio of ammonium persulfate to tap water in solution b is 1 g:(20-40) mL; the use amount ratio of solution a, solution b and the ethanol aqueous solution is 1 mL:(0.2-0.4) mL:(2-4) mL; the volume fraction of the ethanol aqueous solution is 30%-50%.

4. The method according to claim 1, wherein, In step (3), the use amount ratio of the polyester fabric to the finishing liquid is 1 g:(30-50) mL; the temperature of the finishing liquid is 70-80 DEG C; the reaction time is 60-90 min; the output power of the microwave is 300-400 W.

5. A superhydrophobic polyester fabric, characterized in that, The polyester fabric is prepared by the method in any one of claims 1-4.