Preparation method of soft hydrophobic fabric

Abstract

The invention relates to a preparation method of a soft hydrophobic fabric, and belongs to the technical field of fabric preparation. The preparation method comprises the following steps: soaking a composite fabric in a treatment solution, stirring, filtering, washing, drying at low temperature, adding a carboxymethyl chitosan solution and carboxylic butadiene-styrene latex, mechanically stirring, carrying out vacuum degassing, adjusting the pH value, adding xylose, heating, stirring, filtering, washing, drying, soaking in a mixed solution, filtering, drying at low temperature, and thus obtaining the composite fabric. Obtaining a finished product. The polyester and cotton blended fabric is adopted, the hand feeling comfort degree of the fabric is improved, and the fabric has good elasticity and is soft and comfortable; after the fabric is subjected to oxidation treatment through hydrogen peroxide, carboxymethyl chitosan and carboxylic butadiene-styrene latex are compounded, xylose and carboxymethyl chitosan form chemical connection, a compact network structure is formed, the xylose and carboxymethyl chitosan are subjected to coordination with zinc / copper metal ions, a more compact and hydrophobic three-dimensional network structure is formed, and meanwhile, the fabric has a good anti-static effect. The antibacterial performance of the fabric is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of fabric preparation and relates to a method for preparing a soft, hydrophobic fabric. Background Art

[0002] With the continuous improvement of social living standards, people's demand for multifunctional textiles is also growing. In particular, textiles with super hydrophobic functions are increasingly loved and sought after by consumers. These super hydrophobic textiles have a wide range of applications in various professional fields of our daily life, playing an important role and bringing convenience and safety to people's lives.

[0003] The reason why superhydrophobic textiles have attracted so much attention is mainly because they have unique surface properties. These properties prevent water droplets from staying on the surface of the textiles, but instead quickly roll off, thus achieving a waterproof effect. This function not only improves the service life of the textiles, but also enables them to perform well in harsh environments.

[0004] Carboxymethyl chitosan has good film-forming properties and can form a uniform protective film, effectively improving the waterproofness and stain resistance of hydrophobic fabrics. In addition, it also has certain antibacterial properties, which can extend the service life of the fabric and reduce fabric damage caused by bacterial growth. Summary of the invention

[0005] The purpose of the present invention is to provide a method for preparing a soft and hydrophobic fabric. The present invention adopts a polyester and cotton blended fabric, which can effectively improve the comfort level of the textile fabric, and has good elasticity, softness and comfort. The present invention performs oxidation treatment on the fabric by hydrogen peroxide to increase the oxygen-containing functional groups on the surface of the fabric, compound carboxymethyl chitosan and carboxyl styrene butadiene latex, utilize xylose to form a chemical bond connection with the carboxymethyl chitosan to form a denser network structure, and coordinate with zinc / copper metal ions to form a denser and hydrophobic three-dimensional network structure, while improving the antibacterial property of the fabric.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A method for preparing a soft hydrophobic fabric, the method comprising the following steps:

[0008] Step S1: soaking the composite fabric in a treatment liquid, stirring it, filtering it, washing it, and drying it at low temperature to obtain a pretreated fabric;

[0009] Step S2: mechanically stirring the pretreated fabric, carboxymethyl chitosan solution and carboxylated styrene butadiene latex, vacuum degassing, adjusting the pH value, adding xylose, heating and stirring, filtering and washing, and drying in an oven to obtain a prefabricated fabric;

[0010] Step S3: soaking the prefabricated fabric in the mixed solution, filtering it after soaking, and placing it in an oven for low-temperature drying to obtain a soft hydrophobic fabric.

[0011] As a preferred technical solution of the present invention, in step S1, the stirring treatment is stirring at a speed of 200-400 r / min for 30-40 min; the washing is washing twice with deionized water; and the low-temperature drying is drying at a temperature of 40-50°C to constant weight.

[0012] As a preferred technical solution of the present invention, in step S1, the composite fabric is blended by polyester and cotton in a weight ratio of 1:1.

[0013] As a preferred technical solution of the present invention, in step S1, the mass ratio of the composite fabric to the treatment liquid is 2.0-2.4:34-40; the treatment liquid is composed of hydrogen peroxide and deionized water in a mass ratio of 1.6-2.0:300.

[0014] As a preferred technical solution of the present invention, in step S2, the mass ratio of the pretreated fabric, carboxymethyl chitosan solution, carboxylated styrene butadiene latex and xylose is 12-15:60-70:3-4:0.20-0.24.

[0015] As a preferred technical solution of the present invention, in step S2, the carboxymethyl chitosan solution is prepared by mixing carboxymethyl chitosan and deionized water in a mass ratio of 2-3:100; and the solid content of the carboxylated styrene butadiene latex is 50%.

[0016] As a preferred technical solution of the present invention, in step S2, the mechanical stirring is stirring at a speed of 400-500r / min for 20-30min; the vacuum degassing time is 60-90min; the pH value is adjusted to 9-10; the heating stirring is stirring at a temperature of 50-60°C for 6-8h; and the washing is washing three times with a 50wt% ethanol aqueous solution.

[0017] As a preferred technical solution of the present invention, in step S3, the soaking time is 10-12 hours; the drying is carried out at a temperature of 40-50°C to a constant weight.

[0018] As a preferred technical solution of the present invention, in step S3, the mixed solution is formed by mixing zinc chloride, copper chloride and deionized water in a mass ratio of 25:2.0-2.2:1000; the mass ratio of the prefabricated fabric to the mixed solution is 21:80-85.

[0019] Beneficial effects of the present invention:

[0020] The invention adopts polyester and cotton blended fabrics, which can effectively improve the comfort level of the textile fabric, and has good elasticity, softness and comfort. The invention performs oxidation treatment on the fabric by using hydrogen peroxide to increase the oxygen-containing functional groups on the surface of the fabric, compound carboxymethyl chitosan and carboxyl styrene butadiene latex, utilize xylose to form a chemical bond connection with the carboxymethyl chitosan to form a denser network structure, and coordinate with zinc / copper metal ions to form a denser hydrophobic three-dimensional network structure, while improving the antibacterial property of the fabric. DETAILED DESCRIPTION

[0021] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in combination with the embodiments.

[0022] Example 1

[0023] A method for preparing a soft hydrophobic fabric comprises the following steps:

[0024] Step S1: soaking the composite fabric in a treatment liquid, stirring it, filtering it, washing it, and drying it at low temperature to obtain a pretreated fabric;

[0025] Step S2: mechanically stirring the pretreated fabric, carboxymethyl chitosan solution and carboxylated styrene butadiene latex, vacuum degassing, adjusting the pH value, adding xylose, heating and stirring, filtering and washing, and drying in an oven to obtain a prefabricated fabric;

[0026] Step S3: soaking the prefabricated fabric in the mixed solution, filtering it after soaking, and placing it in an oven for low-temperature drying to obtain a soft hydrophobic fabric.

[0027] In step S1, the stirring treatment is stirring at a speed of 200 r / min for 30 minutes; the washing is washing twice with deionized water; the low-temperature drying is drying at a temperature of 40°C to constant weight; the composite fabric is blended by polyester and cotton in a weight ratio of 1:1; the mass ratio of the composite fabric to the treatment liquid is 2.0:34; the treatment liquid is composed of hydrogen peroxide and deionized water in a mass ratio of 1.6:300.

[0028] In step S2, the mass ratio of the pretreated fabric, carboxymethyl chitosan solution, carboxylated styrene butadiene latex and xylose is 12:60:3:0.20; the carboxymethyl chitosan solution is prepared by mixing carboxymethyl chitosan and deionized water in a mass ratio of 2:100; the solid content of the carboxylated styrene butadiene latex is 50%; the mechanical stirring is stirring at a speed of 400 r / min for 20 min; the vacuum degassing time is 60 min; the pH value is adjusted to 9; the heating stirring is stirring at a temperature of 50° C. for 6 h; the washing is washing three times with a 50wt% ethanol aqueous solution;

[0029] In step S3, the immersion time is 10 hours; the drying is performed at 40°C to constant weight; the mixed solution is prepared by mixing zinc chloride, copper chloride and deionized water in a mass ratio of 25:2.0:1000; and the mass ratio of the prefabricated fabric to the mixed solution is 21:80.

[0030] Example 2

[0031] A method for preparing a soft hydrophobic fabric comprises the following steps:

[0032] Step S1: soaking the composite fabric in a treatment liquid, stirring it, filtering it, washing it, and drying it at low temperature to obtain a pretreated fabric;

[0033] Step S2: mechanically stirring the pretreated fabric, carboxymethyl chitosan solution and carboxylated styrene butadiene latex, vacuum degassing, adjusting the pH value, adding xylose, heating and stirring, filtering and washing, and drying in an oven to obtain a prefabricated fabric;

[0034] Step S3: soaking the prefabricated fabric in the mixed solution, filtering it after soaking, and placing it in an oven for low-temperature drying to obtain a soft hydrophobic fabric.

[0035] In step S1, the stirring treatment is stirring at a speed of 250r / min for 35min; the washing is washing twice with deionized water; the low-temperature drying is drying at a temperature of 42°C to constant weight; the composite fabric is blended by polyester and cotton in a weight ratio of 1:1; the mass ratio of the composite fabric to the treatment liquid is 2.1:36; the treatment liquid is composed of hydrogen peroxide and deionized water in a mass ratio of 1.7:300.

[0036] In step S2, the mass ratio of the pretreated fabric, carboxymethyl chitosan solution, carboxylated styrene butadiene latex and xylose is 13:62:3.2:0.21; the carboxymethyl chitosan solution is prepared by mixing carboxymethyl chitosan and deionized water in a mass ratio of 2.2:100; the solid content of the carboxylated styrene butadiene latex is 50%; the mechanical stirring is stirring at a speed of 420 r / min for 25 min; the vacuum degassing time is 68 min; the pH value is adjusted to 9.2; the heating stirring is stirring at a temperature of 52° C. for 6.5 h; the washing is washing three times with a 50wt% ethanol aqueous solution;

[0037] In step S3, the immersion time is 10.5 hours; the drying is performed at 42° C. to constant weight; the mixed solution is prepared by mixing zinc chloride, copper chloride and deionized water in a mass ratio of 25:2.05:1000; and the mass ratio of the prefabricated fabric to the mixed solution is 21:81.

[0038] Example 3

[0039] A method for preparing a soft hydrophobic fabric comprises the following steps:

[0040] Step S1: soaking the composite fabric in a treatment liquid, stirring it, filtering it, washing it, and drying it at low temperature to obtain a pretreated fabric;

[0041] Step S2: mechanically stirring the pretreated fabric, carboxymethyl chitosan solution and carboxylated styrene butadiene latex, vacuum degassing, adjusting the pH value, adding xylose, heating and stirring, filtering and washing, and drying in an oven to obtain a prefabricated fabric;

[0042] Step S3: soaking the prefabricated fabric in the mixed solution, filtering it after soaking, and placing it in an oven for low-temperature drying to obtain a soft hydrophobic fabric.

[0043] In step S1, the stirring treatment is stirring at a speed of 300 r / min for 35 minutes; the washing is washing twice with deionized water; the low-temperature drying is drying at a temperature of 45°C to constant weight; the composite fabric is blended by polyester and cotton in a weight ratio of 1:1; the mass ratio of the composite fabric to the treatment liquid is 2.2:37; the treatment liquid is composed of hydrogen peroxide and deionized water in a mass ratio of 1.8:300.

[0044] In step S2, the mass ratio of the pretreated fabric, carboxymethyl chitosan solution, carboxylated styrene butadiene latex and xylose is 13.5:65:3.5:0.22; the carboxymethyl chitosan solution is prepared by mixing carboxymethyl chitosan and deionized water in a mass ratio of 2.5:100; the solid content of the carboxylated styrene butadiene latex is 50%; the mechanical stirring is stirring at a speed of 450 r / min for 25 min; the vacuum degassing time is 75 min; the pH value is adjusted to 9.5; the heating stirring is stirring at a temperature of 55° C. for 7 h; the washing is washing three times with a 50wt% ethanol aqueous solution;

[0045] In step S3, the immersion time is 11 hours; the drying is performed at 45°C to constant weight; the mixed solution is prepared by mixing zinc chloride, copper chloride and deionized water in a mass ratio of 25:2.1:1000; and the mass ratio of the prefabricated fabric to the mixed solution is 21:82.

[0046] Example 4

[0047] A method for preparing a soft hydrophobic fabric comprises the following steps:

[0048] Step S1: soaking the composite fabric in a treatment liquid, stirring it, filtering it, washing it, and drying it at low temperature to obtain a pretreated fabric;

[0049] Step S2: mechanically stirring the pretreated fabric, carboxymethyl chitosan solution and carboxylated styrene butadiene latex, vacuum degassing, adjusting the pH value, adding xylose, heating and stirring, filtering and washing, and drying in an oven to obtain a prefabricated fabric;

[0050] Step S3: soaking the prefabricated fabric in the mixed solution, filtering it after soaking, and placing it in an oven for low-temperature drying to obtain a soft hydrophobic fabric.

[0051] In step S1, the stirring treatment is stirring at a speed of 350r / min for 38min; the washing is washing twice with deionized water; the low-temperature drying is drying at a temperature of 48°C to constant weight; the composite fabric is blended by polyester and cotton in a weight ratio of 1:1; the mass ratio of the composite fabric to the treatment liquid is 2.3:38; the treatment liquid is composed of hydrogen peroxide and deionized water in a mass ratio of 1.9:300.

[0052] In step S2, the mass ratio of the pretreated fabric, carboxymethyl chitosan solution, carboxylated styrene butadiene latex and xylose is 14.2:68:3.8:0.23; the carboxymethyl chitosan solution is prepared by mixing carboxymethyl chitosan and deionized water in a mass ratio of 2.8:100; the solid content of the carboxylated styrene butadiene latex is 50%; the mechanical stirring is stirring at a speed of 470 r / min for 28 min; the vacuum degassing time is 82 min; the pH value is adjusted to 9.8; the heating stirring is stirring at a temperature of 58° C. for 7.5 h; the washing is washing three times with a 50wt% ethanol aqueous solution;

[0053] In step S3, the immersion time is 11.5 hours; the drying is performed at 48°C to constant weight; the mixed solution is prepared by mixing zinc chloride, copper chloride and deionized water in a mass ratio of 25:2.15:1000; and the mass ratio of the prefabricated fabric to the mixed solution is 21:84.

[0054] Example 5

[0055] A method for preparing a soft hydrophobic fabric comprises the following steps:

[0056] Step S1: soaking the composite fabric in a treatment liquid, stirring it, filtering it, washing it, and drying it at low temperature to obtain a pretreated fabric;

[0057] Step S2: mechanically stirring the pretreated fabric, carboxymethyl chitosan solution and carboxylated styrene butadiene latex, vacuum degassing, adjusting the pH value, adding xylose, heating and stirring, filtering and washing, and drying in an oven to obtain a prefabricated fabric;

[0058] Step S3: soaking the prefabricated fabric in the mixed solution, filtering it after soaking, and placing it in an oven for low-temperature drying to obtain a soft hydrophobic fabric.

[0059] In step S1, the stirring treatment is stirring at a speed of 400 r / min for 40 minutes; the washing is washing twice with deionized water; the low-temperature drying is drying at a temperature of 50°C to constant weight; the composite fabric is blended by polyester and cotton in a weight ratio of 1:1; the mass ratio of the composite fabric to the treatment liquid is 2.4:40; the treatment liquid is composed of hydrogen peroxide and deionized water in a mass ratio of 2.0:300.

[0060] In step S2, the mass ratio of the pretreated fabric, carboxymethyl chitosan solution, carboxylated styrene butadiene latex and xylose is 15:70:4:0.24; the carboxymethyl chitosan solution is prepared by mixing carboxymethyl chitosan and deionized water in a mass ratio of 3:100; the solid content of the carboxylated styrene butadiene latex is 50%; the mechanical stirring is stirring at a speed of 500 r / min for 30 min; the vacuum degassing time is 90 min; the pH value is adjusted to 10; the heating stirring is stirring at a temperature of 60° C. for 8 h; the washing is washing three times with a 50wt% ethanol aqueous solution;

[0061] In step S3, the immersion time is 12 hours; the drying is performed at 50°C to constant weight; the mixed solution is prepared by mixing zinc chloride, copper chloride and deionized water in a mass ratio of 25:2.2:1000; and the mass ratio of the prefabricated fabric to the mixed solution is 21:85.

[0062] Comparative Example 1

[0063] Compared with Example 4, the difference in Comparative Example 1 is that step S1 is not performed, composite fabric is used instead of pretreated fabric, and the other components, preparation steps and parameters are the same.

[0064] Comparative Example 2

[0065] Compared with Example 4, the difference in Comparative Example 2 is that carboxymethyl chitosan is used instead of carboxylated styrene butadiene latex, and the other components, preparation steps and parameters are the same.

[0066] Comparative Example 3

[0067] Compared with Example 4, Comparative Example 3 is different in that carboxymethyl chitosan is not used, and the remaining components, preparation steps and parameters are the same.

[0068] Comparative Example 4

[0069] Compared with Example 4, the difference of Comparative Example 4 is that the mass ratio of the pretreated fabric, carboxymethyl chitosan solution, carboxylated styrene butadiene latex and xylose is 14.2:68:3.8:0.6, and the other components, preparation steps and parameters are the same.

[0070] Comparative Example 5

[0071] Compared with Example 4, Comparative Example 5 is different in that xylose is not used, and the other components, preparation steps and parameters are the same.

[0072] Comparative Example 6

[0073] Compared with Example 4, Comparative Example 6 is different in that zinc chloride is used instead of copper chloride, and the other components, preparation steps and parameters are the same.

[0074] Comparative Example 7

[0075] Compared with Example 4, Comparative Example 7 is different in that step S3 is not performed, and the remaining components, preparation steps and parameters are the same.

[0076] The fabrics prepared in Examples 1-5 and Comparative Examples 1-7 were subjected to the following performance tests, respectively. The test results are shown in Table 1.

[0077] Surface contact angle test: The water droplet size is 3μ, and 5 different positions are selected for measurement. The test is performed using the DSA100 optical contact angle meter, and the final contact angle is the average value;

[0078] Antibacterial performance test: refer to standard GB / T20944.3-2008 "Evaluation of antibacterial properties of textiles Part 3: Oscillation method";

[0079] Table 1

[0080] Surface contact angle (°) Escherichia coli inhibition rate (%) Example 1 143.4 99.5 Example 2 143.3 99.4 Example 3 142.6 99.1 Example 4 143.8 99.8 Example 5 142.9 99.2 Comparative Example 1 112.5 88.6 Comparative Example 2 94.6 84.7 Comparative Example 3 101.8 85.8 Comparative Example 4 118.6 84.6 Comparative Example 5 124.2 90.6 Comparative Example 6 139.6 92.3 Comparative Example 7 122.4 89.3

[0081] From the test results in Table 1, it can be seen that compared with Comparative Examples 1-7, the hydrophobicity and antibacterial properties of the fabrics prepared in Examples 1-5 of the present invention are significantly better than those of the fabrics prepared in Comparative Examples 1-7.

[0082] Through comparative analysis, it can be known that this is because the present invention performs oxidation treatment on the fabric with hydrogen peroxide to increase the oxygen-containing functional groups on the surface of the fabric, and by introducing more hydroxyl groups, utilizes the interaction between hydroxyl groups and carboxyl groups and amino groups to promote carboxymethyl chitosan to be integrated into the fabric structure, and then utilizes carboxymethyl chitosan and carboxylated styrene butadiene latex to form an interpenetrating network structure through the effects of hydrogen bonds and electrostatic adsorption, and then utilizes the carbonyl group of xylose to form a chemical bond connection with the amino group of carboxymethyl chitosan under heating conditions, and the reaction activity between xylose with a shorter carbon chain and carboxymethyl chitosan is stronger, and the formation of a chemical bond connection can effectively fix the carboxymethyl chitosan and carboxylated styrene butadiene latex, further improving the structural density, and finally forms a more dense and hydrophobic three-dimensional network structure through the coordination of amino groups, hydroxyl groups and carboxyl groups with metal ions.

[0083] In addition, the present invention effectively improves the hydrophobicity of the fabric surface through the interaction between carboxymethyl chitosan, carboxylated styrene butadiene latex and xylose, combines hydrophobic and antibacterial metal ions, the introduction of hydrophobic benzene ring structure and organic carbon chain, and combines a dense network structure, can reduce the adhesion of bacteria on the fabric surface, thereby reducing bacterial proliferation and biofilm formation, which helps to improve the antibacterial effect of the fabric.

[0084] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for preparing a soft hydrophobic fabric, characterized in that: The preparation method comprises the following steps: Step S1: soaking the composite fabric in a treatment liquid, stirring it, filtering it, washing it, and drying it at low temperature to obtain a pretreated fabric; Step S2: mechanically stirring the pretreated fabric, carboxymethyl chitosan solution and carboxylated styrene butadiene latex, vacuum degassing, adjusting the pH value, adding xylose, heating and stirring, filtering and washing, and drying in an oven to obtain a prefabricated fabric; Step S3: soaking the prefabricated fabric in the mixed solution, filtering it after soaking, and placing it in an oven for low-temperature drying to obtain a soft hydrophobic fabric.

2. The method for preparing a soft hydrophobic fabric according to claim 1, characterized in that: In step S1, the stirring treatment is stirring at a speed of 200-400 r / min for 30-40 min; the washing is washing twice with deionized water; and the low-temperature drying is drying at a temperature of 40-50° C. to constant weight.

3. The method for preparing a soft hydrophobic fabric according to claim 1, characterized in that: In step S1, the composite fabric is formed by blending polyester and cotton in a weight ratio of 1:

1.

4. The method for preparing a soft hydrophobic fabric according to claim 1, characterized in that: In step S1, the mass ratio of the composite fabric to the treatment liquid is 2.0-2.4:34-40; the treatment liquid is composed of hydrogen peroxide and deionized water in a mass ratio of 1.6-2.0:

300.

5. The method for preparing a soft hydrophobic fabric according to claim 1, characterized in that: In step S2, the mass ratio of the pretreated fabric, carboxymethyl chitosan solution, carboxylated styrene butadiene latex and xylose is 12-15:60-70:3-4:0.20-0.

24.

6. The method for preparing a soft hydrophobic fabric according to claim 1, characterized in that: In step S2, the carboxymethyl chitosan solution is prepared by mixing carboxymethyl chitosan and deionized water in a mass ratio of 2-3:100; the solid content of the carboxylated styrene butadiene latex is 50%.

7. The method for preparing a soft hydrophobic fabric according to claim 1, characterized in that: In step S2, the mechanical stirring is stirring at a speed of 400-500r / min for 20-30min; the vacuum degassing time is 60-90min; the pH value is adjusted to 9-10; the heating stirring is stirring at a temperature of 50-60°C for 6-8h; and the washing is washing three times with a 50wt% ethanol aqueous solution.

8. The method for preparing a soft hydrophobic fabric according to claim 1, characterized in that: In step S3, the soaking time is 10-12 hours; the drying is carried out at a temperature of 40-50° C. to a constant weight.

9. The method for preparing a soft hydrophobic fabric according to claim 1, characterized in that: In step S3, the mixed solution is prepared by mixing zinc chloride, copper chloride and deionized water in a mass ratio of 25:2.0-2.2:1000; the mass ratio of the prefabricated fabric to the mixed solution is 21:80-85.