An antistatic spandex fabric and its preparation method

Abstract

The present invention relates to an antistatic spandex fabric and a preparation method thereof. The fabric can be prepared by the following method: First, polyphenylene sulfide and sodium dodecyl sulfonate are dissolved in N-methylpyrrolidone to obtain a mixed solution; second, the spandex fabric is immersed in the mixed solution; finally, the spandex fabric is dried, rinsed with tap water, and dried again to obtain the antistatic spandex fabric. The point-to-point resistance of the antistatic spandex fabric prepared by the present invention reaches 1.9×10 6 ~2.4×10 6 Ω, and the charged electric quantity reaches 0.17~0.21 μC / piece; after 20 times of washing, the point-to-point resistance and the charged electric quantity do not change significantly, indicating that the spandex fabric prepared by the present invention has a stable antistatic function.

Description

Technical Field

[0001] The present invention belongs to the technical field of fabric preparation, and particularly relates to an antistatic spandex fabric and a preparation method thereof. Background Art

[0002] When two different substances rub against each other, electron movement occurs between the two substances. Electrons transfer from the surface of one substance to the surface of the other substance. As a result, the former loses electrons and becomes positively charged, while the latter gains electrons and becomes negatively charged, thus generating static electricity.

[0003] Fibers with amide bonds such as wool, nylon, and artificial wool tend to be positively charged, while polyester, polyacrylonitrile, etc. tend to be negatively charged. The electrification phenomenon generated during fiber friction is caused by the movement of charges between the rubbed fibers. The amount of charge accumulated on the surface of a polymer depends on the nature of the polymer itself for charge dissipation, and its main dissipation methods are: surface conduction, bulk conduction, radiation to the surrounding air, and surface conduction is the main way. Since the surface conductivity is generally greater than the volume conductivity, the static electricity on the surface of polymer materials is mainly dominated by the surface conductivity of the polymer. Preventing the accumulation of static electricity can be achieved by increasing the surface conductivity or volume conductivity of the polymer material to enable the polymer material to discharge quickly. With the rapid development of industries such as the electronics industry, petrochemical industry, medical and health, the requirements for the production and working environment are getting higher and higher, and the awareness of individual protection is gradually strengthened. Therefore, the development and application of antistatic textiles such as high-quality, comfortable, and cost-effective antistatic fibers, antistatic fabrics, and corresponding antistatic clothing have become the goals pursued by the majority of textile researchers.

[0004] Spandex fabric can be used as an antistatic fabric, which has advantages such as good air permeability. However, it is difficult to modify its antistatic function; polyphenylene sulfide has conductivity and has great potential in the application of antistatic fabrics. There are certain difficulties in using polyphenylene sulfide and spandex in combination as an antistatic fabric because the compatibility between polyphenylene sulfide and spandex is poor.

[0005] Technical Solution

[0006] Aiming at the defects of the prior art, the first object of the present invention is to provide an antistatic spandex fabric with good antistatic function.

[0007] The antistatic spandex fabric described in the present invention can be prepared by the following method: First, dissolve polyphenylene sulfide and sodium dodecyl sulfonate in N-methylpyrrolidone to obtain a mixed solution; Second, immerse the spandex fabric in the mixed solution; Finally, air-dry the spandex fabric, rinse it with tap water, and then air-dry it again to obtain the antistatic spandex fabric.

[0008] The second object of the present invention is to provide a preparation method of an antistatic spandex fabric, including the following steps:

[0009] (1) Dissolve polyphenylene sulfide and sodium dodecyl sulfonate in N-methylpyrrolidone to obtain a mixed solution.

[0010] Preferably, the dosage ratio of polyphenylene sulfide, sodium dodecyl sulfonate to N-methylpyrrolidone is 1 g∶(0.1~0.3) g∶(10~15) mL.

[0011] (2) Immerse the spandex fabric in the mixed solution prepared in step (1).

[0012] Preferably, the temperature of the mixed solution is controlled at 120~130 °C, and the immersion time is 15~20 minutes.

[0013] (3) Air-dry the spandex fabric treated in step (2), rinse it with tap water, and then air-dry it again to obtain the antistatic spandex fabric.

[0014] Analysis of the related mechanism of the present invention: The sulfur atom of polyphenylene sulfide is an electron-donating group, and the carbonyl group of the spandex fabric is an electron-withdrawing group, and the two have strong bonding properties. In a solvent environment and at a high temperature, polyphenylene sulfide can be stably attached to the surface of the spandex fabric.

[0015] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0016] (1) Polyphenylene sulfide has conductivity and can be used as a material for antistatic fabrics; however, it is difficult to attach to the fabric surface. The present invention selects spandex as the carrier fabric and creatively realizes the attachment of polyphenylene sulfide to the spandex fabric under high-temperature conditions and a dissolution environment.

[0017] (2) The present invention uses sodium dodecyl sulfonate as a dopant, and realizes a significant improvement in the conductivity of polyphenylene sulfide through doping finishing.

[0018] (3) According to the test method of GB 12014—2009, the point-to-point resistance of the antistatic spandex fabric prepared by the present invention reaches 1.9×10 6 ~2.4×10 6 Ω, and the charged charge amount reaches 0.17~0.21 μC / item, meeting the A-level or B-level technical standards; after 20 washes, the point-to-point resistance and the charged charge amount do not change significantly, indicating that the spandex fabric prepared by the present invention has a stable antistatic function. Specific embodiments

[0019] Example 1

[0020] An antistatic spandex fabric is prepared by the following method:

[0021] (1) Dissolve 10 g of polyphenylene sulfide and 2 g of sodium dodecyl sulfonate in 125 mL of N-methylpyrrolidone to obtain a mixed solution.

[0022] (2) Immerse the spandex fabric in the mixed solution prepared in step (1), control the temperature of the mixed solution at 125 °C, and the immersion time is 17 minutes.

[0023] (3) Air-dry the spandex fabric treated in step (2), rinse it with tap water, and then air-dry it again to obtain the antistatic spandex fabric a.

[0024] Example 2

[0025] An antistatic spandex fabric is prepared by the following method:

[0026] (1) Dissolve 10 g of polyphenylene sulfide and 1 g of sodium dodecyl sulfonate in 100 mL of N-methylpyrrolidone to obtain a mixed solution.

[0027] (2) Immerse the spandex fabric in the mixed solution prepared in step (1), control the temperature of the mixed solution at 120 °C, and the immersion time is 15 minutes.

[0028] (3) Air-dry the spandex fabric treated in step (2), rinse it with tap water, and then air-dry it again to obtain the antistatic spandex fabric b.

[0029] Example 3

[0030] An antistatic spandex fabric is prepared by the following method:

[0031] (1) Dissolve 10 g of polyphenylene sulfide and 3 g of sodium dodecyl sulfonate in 150 mL of N-methylpyrrolidone to obtain a mixed solution.

[0032] (2) Immerse the spandex fabric in the mixed solution prepared in step (1), control the temperature of the mixed solution at 130 °C, and the immersion time is 20 minutes.

[0033] (3) Air-dry the spandex fabric treated in step (2), rinse it with tap water, and then air-dry it again to obtain the antistatic spandex fabric c.

[0034] Comparative Example A

[0035] Taking Example 1 as a comparison, in this Comparative Example A, the dopant is changed, that is, "sodium dodecyl sulfonate" in step (1) is replaced with "sodium benzenesulfonate", and other preparation methods are implemented according to the preparation method of Example 1 to obtain the antistatic spandex fabric d.

[0036] Comparative Example B

[0037] Taking Example 1 as a comparison, in this Comparative Example B, the finishing temperature was decreased, that is, "the temperature of the mixed solution was controlled at 125 °C" in step (2) was replaced with "the temperature of the mixed solution was controlled at 30 °C", and other preparation methods were carried out according to the preparation method of Example 1 to obtain the antistatic spandex fabric e.

[0038] Comparative Example C

[0039] Taking Example 1 as a comparison, in this Comparative Example C, the finishing time was shortened, that is, "the immersion time was 17 minutes" in step (2) was replaced with "the immersion time was 3 minutes", and other preparation methods were carried out according to the preparation method of Example 1 to obtain the antistatic spandex fabric f.

[0040] Performance evaluation test:

[0041] The antistatic spandex fabrics a, b, c, d, e and f prepared in the above Specific Examples 1 to 3 and Comparative Examples A to C of the present invention were selected. The antistatic function test referred to GB 12014—2009 "Antistatic Clothing", and the point-to-point resistance and charged charge amount were used as the antistatic function evaluation indexes. Among them, the point-to-point resistance referred to Appendix A of GB 12014—2009, and the charged charge amount referred to the test method in Appendix B of GB 12014—2009. The test conditions were: temperature: (20±5) °C, relative humidity: (35±5)%. The test results are shown in Table 1.

[0042] Table 1

[0043]

[0044]

[0045] As can be seen from Table 1, by comparing the point-to-point resistance and charged charge amount of the antistatic spandex fabrics a, b, c, d, e and f prepared in Examples 1 to 3 and Comparative Examples A to C, it can be seen that Examples 1 to 3 are significantly superior to Comparative Examples A to C in terms of antistatic indexes. The performance evaluation test results show that the change of the dopant, the decrease of the finishing temperature and the shortening of the finishing time all have important effects on the antistatic function of the spandex fabric.

Claims

1. A preparation method of an antistatic spandex fabric, characterized in that, The preparation method comprises the following steps: (1) Dissolve polyphenylene sulfide and sodium dodecyl sulfonate in N-methylpyrrolidone to obtain a mixed solution; (2) Immerse the spandex fabric in the mixed solution prepared in step (1); (3) Air-dry the spandex fabric treated in step (2), rinse it with tap water, and then air-dry it again to obtain an antistatic spandex fabric; the temperature of the mixed solution in step (2) is controlled at 120-130°C, and the immersion time is 15-20 minutes.

2. The preparation method of an anti-static spandex fabric according to claim 1, wherein, In step (1), the dosage ratio of polyphenylene sulfide, sodium dodecyl sulfonate to N-methylpyrrolidone is 1 g∶(0.1-0.3) g∶(10-15) mL.

3. An antistatic spandex fabric, characterized in that, It is prepared by the method described in any one of claims 1-2.

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