Antibacterial polyester fabric and preparation method thereof

Abstract

The present application relates to a kind of antibacterial polyester fabric and its preparation method, the fabric can be prepared by the following method: first, extract meliatoxin from Melia Tooson;Second, it is prepared with epichlorohydrin into finishing liquor;Finally, polyester fabric is carried out antibacterial finishing in finishing liquor, and antibacterial polyester fabric is prepared.The initial antibacterial rate of antibacterial polyester fabric prepared by the present application to escherichia coli reaches more than 97.5%, after 10 times of washing, it still shows very strong antibacterial performance to escherichia coli, and the antibacterial rate reaches more than 94.0%;The initial antibacterial rate of antibacterial polyester fabric to staphylococcus aureus reaches more than 98.5%, after 10 times of washing, it still shows very strong antibacterial performance to staphylococcus aureus, and the antibacterial rate reaches more than 94.0%.

Description

Technical Field

[0001] This invention belongs to the field of fabric preparation technology, specifically relating to an antibacterial polyester fabric and its preparation method. Background Technology

[0002] Polyester fabric is a widely used synthetic fiber in everyday clothing. Its biggest advantages are its excellent wrinkle resistance and shape retention. Furthermore, polyester fabrics possess high strength and elastic recovery, as well as good heat and light resistance. Therefore, polyester fabric is widely used in outerwear, various bags, tents, and other outdoor products. However, polyester fabric is made from synthetic polyester fibers. Like natural fibers, it easily absorbs sweat, dander, and sebum produced by the human body, thus fostering microbial growth, producing odors, and potentially impacting human health. Therefore, researching and developing polyester fabrics with good antibacterial properties is currently a key focus in the textile industry.

[0003] Literature review indicates that the antibacterial properties of polyester fabrics have received widespread attention. For example, Chinese invention patent application number 202011347337.1 discloses a method for preparing antibacterial polyester low-elasticity yarn: pretreated polyethylene terephthalate is melt-mixed and added to a spinning metering pump to spin polyester filaments, then an antibacterial liquid is sprayed onto the surface, followed by ultraviolet irradiation and drying. Chinese invention patent application number 201210192503.4 discloses an antibacterial polyester fiber, its production method, and its applications: zeolite-loaded silver-zinc antibacterial agent is mixed with polyester resin, melt-extruded to prepare antibacterial masterbatch, and then melt-spun with polyester resin to produce antibacterial polyester fiber. However, the antibacterial polyester fabrics prepared by these methods still have many shortcomings, such as the difficulty in uniformly dispersing the antibacterial powder in the polyester fiber, which can easily lead to poor spinnability and unreliable antibacterial properties. Therefore, based on summarizing existing technologies, improving the antibacterial finishing methods of polyester fabrics, and thus developing polyester fabrics with superior antibacterial properties, is the goal that fabric developers have been working tirelessly towards. Summary of the Invention

[0004] In view of the above-mentioned drawbacks of the existing technology, the purpose of this invention is to provide an antibacterial polyester fabric and its preparation method.

[0005] The purpose of this invention is to provide an antibacterial polyester fabric, which is environmentally friendly and human-friendly. The fabric can be prepared by the following method: First, extracting azadirachtin from neem seeds; second, preparing a finishing solution with epichlorohydrin and the like; finally, performing antibacterial finishing on the polyester fabric in the finishing solution to obtain the antibacterial polyester fabric.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] S1. Preparation of finishing solution: Cinnamaldehyde is dissolved in dimethylformamide to prepare the finishing solution.

[0008] Preferably, the ratio of cinnamaldehyde to dimethylformamide is 1:(100-200).

[0009] S2. Preparation of initiator solution: Dissolve azobisisobutyronitrile in dimethylformamide to prepare an initiator solution.

[0010] Preferably, the ratio of azobisisobutyronitrile to dimethylformamide is 1 g: (30-50) mL.

[0011] S3. Antibacterial finishing: Immerse the polyester fabric in the finishing solution prepared in step S1, adjust the temperature of the finishing solution, add the initiator solution prepared in step S2 dropwise to the finishing solution, and keep it warm for a period of time after the addition is completed; after the reaction is completed, take out the polyester fabric, and then wash and dry it to obtain antibacterial polyester fabric.

[0012] Preferably, the ratio of the polyester fabric, initiator solution and finishing liquid is: 1g:(3-5)mL:(20-40)mL.

[0013] Preferably, the temperature of the finishing solution is 90–100°C.

[0014] Preferably, the dripping time is 30-60 minutes and the heat preservation time is 30-60 minutes.

[0015] Analysis of the main reaction mechanism of this invention: Cinnamaldehyde has bactericidal, disinfectant, and antiseptic properties, especially with significant efficacy against fungi. It has inhibitory effects on Escherichia coli, Bacillus subtilis, Staphylococcus aureus, Staphylococcus albus, Shigella dysenteriae, Salmonella typhi and paratyphi A, Streptococcus pneumoniae, Enterobacter aerogenes, Proteus, Bacillus anthracis, Salmonella enteritidis, and Vibrio cholerae. Inspired by this, the inventors of this application polymerized cinnamaldehyde with polyester to graft it onto polyester fabric. The inventors unexpectedly discovered that the grafted polyester fabric still exhibited good antibacterial properties.

[0016] This invention has the following significant features:

[0017] (1) In this invention, cinnamaldehyde is reacted with polyester fabric to graft onto the polyester fabric; the inventors of this application unexpectedly discovered that cinnamaldehyde and polyester fabric are chemically bonded together, and the bond is very strong. Even after multiple washes, its antibacterial properties remain unchanged.

[0018] (2) The prepared antibacterial polyester fabric has the characteristics of being environmentally friendly and human-friendly; the antibacterial finishing process is simple, the raw materials are widely available, and it has the prospect of large-scale production.

[0019] (3) The antibacterial polyester fabric prepared by the present invention has an initial antibacterial rate of over 97.5% against Escherichia coli. After 10 washes, it still exhibits strong antibacterial properties against Escherichia coli, with an antibacterial rate of over 94.0%. The antibacterial polyester fabric has an initial antibacterial rate of over 98.5% against Staphylococcus aureus. After 10 washes, it still exhibits strong antibacterial properties against Staphylococcus aureus, with an antibacterial rate of over 94.0%. Detailed Implementation

[0020] The present invention is described in detail below with reference to the embodiments and comparative examples.

[0021] Example 1

[0022] In this embodiment, a method for preparing an antibacterial polyester fabric includes the following steps:

[0023] S1. Preparation of finishing solution: Dissolve 10 mL of cinnamaldehyde in 1500 mL of dimethylformamide to prepare the finishing solution.

[0024] S2. Preparation of initiator solution: Dissolve 1g of azobisisobutyronitrile in 45mL of dimethylformamide to prepare the initiator solution.

[0025] S3. Antibacterial finishing: Immerse 10g of polyester fabric in 300mL of the finishing solution prepared in step S1, and adjust the temperature of the finishing solution to 95℃. Add 40mL of the initiator solution prepared in step S2 dropwise to the finishing solution for 45 minutes, and keep warm for 45 minutes. After the reaction is complete, take out the polyester fabric, and then wash and dry it to obtain antibacterial polyester fabric.

[0026] Example 2

[0027] In this embodiment, a method for preparing an antibacterial polyester fabric includes the following steps:

[0028] S1. Preparation of finishing solution: Dissolve 10 mL of cinnamaldehyde in 1000 mL of dimethylformamide to prepare the finishing solution.

[0029] S2. Preparation of initiator solution: Dissolve 1g of azobisisobutyronitrile in 30mL of dimethylformamide to prepare an initiator solution.

[0030] S3. Antibacterial finishing: Immerse 10g of polyester fabric in 200mL of the finishing solution prepared in step S1, and adjust the temperature of the finishing solution to 95℃. Add 30mL of the initiator solution prepared in step S2 dropwise to the finishing solution for 30 minutes, and keep warm for 30 minutes. After the reaction is complete, take out the polyester fabric, and then wash and dry it to obtain antibacterial polyester fabric.

[0031] Example 3

[0032] In this embodiment, a method for preparing an antibacterial polyester fabric includes the following steps:

[0033] S1. Preparation of finishing solution: Dissolve 10 mL of cinnamaldehyde in 2000 mL of dimethylformamide to prepare the finishing solution.

[0034] S2. Preparation of initiator solution: Dissolve 1g of azobisisobutyronitrile in 50mL of dimethylformamide to prepare an initiator solution.

[0035] S3. Antibacterial finishing: Immerse 10g of polyester fabric in 400mL of the finishing solution prepared in step S1, and adjust the temperature of the finishing solution to 100℃. Add 40mL of the initiator solution prepared in step S2 dropwise to the finishing solution for 60 minutes, and keep warm for 60 minutes. After the reaction is complete, take out the polyester fabric, and then wash and dry it to obtain antibacterial polyester fabric.

[0036] Comparative Example A

[0037] Compared with Example 1, in this comparative example, "cinnamaldehyde" was changed to "acrylic acid" in step S1, and other preparation methods were carried out in accordance with the preparation method of Example 1.

[0038] Comparative Example B

[0039] Compared with Example 1, in this comparative example, in step S2, "1g azobisisobutyronitrile" was changed to "0.1g azobisisobutyronitrile", and other preparation methods were carried out in accordance with the preparation method of Example 1.

[0040] Comparative Example C

[0041] Compared with Example 1, in this comparative example, in step S3, "the temperature of the finishing solution is adjusted to 95°C" is changed to "the temperature of the finishing solution is adjusted to 45°C", and other preparation methods are carried out according to the preparation method of Example 1.

[0042] Antibacterial performance test:

[0043] Antibacterial polyester fabrics prepared in Examples 1-3 and Comparative Example AC were subjected to antibacterial tests. The specific antibacterial test methods were as follows: qualitative testing of the fabrics was performed using the agar diffusion method according to GB / T 20944.1-2007 "Evaluation of Antibacterial Properties of Textiles Part 1: Agar Diffusion Method"; quantitative antibacterial properties of the fabrics were determined according to GB / T 20944.3-2008 "Evaluation of Antibacterial Properties of Textiles Part 3: Shaking Method". The bacterial species used were Staphylococcus aureus and Escherichia coli. The qualitative test results of the samples were expressed as inhibition zones, and the quantitative antibacterial activity was expressed as the inhibition rate, calculated using the formula: Inhibition rate = (1-B / A)×100%, where A is the number of viable bacteria on the untreated fabric; and B is the number of viable bacteria on the treated fabric. The fabrics to be tested were subjected to standard washing according to the washing method of GB / T 20944.1-2007 Test for Color Fastness to Wash. The antibacterial properties of the initial sample and the sample after 10 washes were tested. The test results are shown in Table 1 and Table 2.

[0044] Table 1 shows the antibacterial rate of antibacterial polyester fabrics prepared in Examples 1-3 and Comparative Example AC against Escherichia coli.

[0045]

[0046] As shown in Table 1, the antibacterial polyester fabrics prepared in Examples 1-3 exhibit strong antibacterial properties against Escherichia coli. The unwashed antibacterial polyester fabric showed an inhibition rate of over 97.5% against Escherichia coli. Even after 10 washes, the antibacterial polyester fabric still demonstrated strong antibacterial properties against Escherichia coli, with an inhibition rate exceeding 94.0%. The antibacterial polyester fabric prepared in Comparative Example AC showed a significantly lower inhibition rate against Escherichia coli. This indicates that the choice of cinnamaldehyde, the amount of azobisisobutyronitrile (AIB), and the temperature of the finishing solution all have a significant impact on the antibacterial properties of the polyester fabric.

[0047] Table 2 shows the antibacterial rate of Staphylococcus aureus against the antibacterial polyester fabrics prepared in Examples 1-3 and Comparative Example AC.

[0048]

[0049] As shown in Table 2, the antibacterial polyester fabrics prepared in Examples 1-3 exhibit strong antibacterial properties against Staphylococcus aureus. The unwashed antibacterial polyester fabric showed an inhibition rate of over 98.5% against Staphylococcus aureus. Even after 10 washes, the antibacterial polyester fabric still demonstrated strong antibacterial properties against Staphylococcus aureus, with an inhibition rate exceeding 94.0%. The antibacterial polyester fabric prepared in Comparative Example AC showed a significantly lower inhibition rate against Staphylococcus aureus. This indicates that the choice of cinnamaldehyde, the amount of azobisisobutyronitrile (AIB), and the temperature of the finishing solution all have a significant impact on the antibacterial properties of the polyester fabric.

[0050] By analyzing the inhibition rate of antibacterial polyester fabric against Staphylococcus aureus and Escherichia coli, it can be concluded that the antibacterial polyester fabric prepared in this invention has strong antibacterial properties.

Claims

1. A method for preparing an antibacterial polyester fabric, characterized in that, The preparation method includes the following steps: S1. Preparation of finishing solution: Dissolve cinnamaldehyde in dimethylformamide to prepare the finishing solution; S2. Preparation of initiator solution: Dissolve azobisisobutyronitrile in dimethylformamide to prepare an initiator solution; S3. Antibacterial finishing: Immerse the polyester fabric in the finishing solution prepared in step S1, adjust the temperature of the finishing solution, add the initiator solution prepared in step S2 dropwise to the finishing solution, and keep it warm for a period of time after the addition is completed; after the reaction is completed, take out the polyester fabric, and then wash and dry it to obtain antibacterial polyester fabric. In step S2, the ratio of azobisisobutyronitrile to dimethylformamide is 1g:(30-50)mL. The temperature of the finishing solution in step S3 is 90-100℃.

2. The method for preparing an antibacterial polyester fabric according to claim 1, characterized in that, In step S1, the ratio of cinnamaldehyde to dimethylformamide is 1 mL : (100-200) mL.

3. The method for preparing an antibacterial polyester fabric according to claim 1, characterized in that, In step S3, the ratio of polyester fabric, initiator solution and finishing liquid is: 1g:(3-5)mL:(20-40)mL.

4. The method for preparing an antibacterial polyester fabric according to claim 1, characterized in that, In step S3, the dripping time is 30-60 minutes, and the heat preservation time is 30-60 minutes.

5. An antibacterial polyester fabric, characterized in that, It is prepared by the method described in any one of claims 1 to 4.

Images