Antistatic polyester fabric and preparation method thereof

Abstract

The present invention relates to an antistatic polyester fabric and a preparation method thereof. The fabric can be prepared by the following method: first, Ce(NO3)3·6H2O, citric acid solution, aniline monomer and polyacrylate coating agent are used as raw materials to prepare a composite coating agent; second, the composite coating agent is coated on the surface of the polyester fabric; finally, the polyester fabric is immersed in a phenylphosphonic acid solution to prepare the antistatic polyester fabric. The point-to-point resistance of the antistatic polyester fabric prepared by the present invention reaches 2.5×10 6 ~3.2×10 6 Ω, the electric charge reaches 0.15-0.19 μC / piece; after 20 washes, the point-to-point resistance and the electric charge do not change significantly, indicating that the polyester fabric prepared by the present invention has a stable antistatic function.

Description

Technical Field

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

[0002] Anti-static fabrics are fabrics that have been treated with anti-static processing and are widely used in the petroleum industry, mining and metallurgy industry, chemical industry, electronics industry, pharmaceutical industry, etc. Its static elimination is based on two mechanisms: charge discharge and neutralization. When grounded, the static electricity on the fabric is not only neutralized by the corona discharge of the conductive fiber, but can also be discharged to the ground through the conductive fiber; when not grounded, the static electricity is eliminated with the help of the weak corona discharge of the conductive fiber.

[0003] Since polyester fiber itself does not have anti-static function, in order to achieve the anti-static effect, three different anti-static treatment technologies are usually used: one is to add conductive thread to the fabric, the second is to apply anti-static coating on the fabric surface, and the third is to use chemical fiber raw materials as the main body, and special chemical fiber filaments and high-performance permanent conductive fibers are woven through a special process; these three anti-static treatment technologies have their own advantages and disadvantages.

[0004] Polyester fabrics are widely used in anti-static fabrics, but the anti-static durability of polyester fabrics is poor and it is easy to lose the anti-static function after washing. Polyaniline and CeO2 are conductive and can be used as materials for anti-static fabrics, but it is difficult to use them together to improve anti-static properties. First, the two are difficult to combine, and second, it is difficult to combine the two with fabrics.

[0005] Technical Solution

[0006] In view of the defects of the prior art, the first object of the present invention is to provide an antistatic polyester fabric having good antistatic function.

[0007] The antistatic polyester fabric described in the present invention can be prepared by the following method: first, Ce(NO3)3·6H2O and citric acid solution are used to prepare CeO2 sol; second, aniline monomer is used as a raw material to prepare a polyaniline solution; third, the polyaniline solution is mixed with CeO2 sol to obtain a composite sol, and the composite sol is mixed with a polyacrylate coating agent to obtain a composite coating agent; third, the composite coating agent is coated on the surface of the polyester fabric; finally, the polyester fabric is immersed in a phenylphosphonic acid solution to prepare the antistatic polyester fabric.

[0008] The second object of the present invention is to provide a method for preparing an antistatic polyester fabric, comprising the following steps:

[0009] (1) Weigh Ce(NO3)3·6H2O and dissolve it in deionized water, then add citric acid solution; then adjust the pH of the solution to 4-5 and stir for 1-2 hours to obtain CeO2 sol.

[0010] Preferably, the usage ratio of Ce(NO3)3·6H2O, citric acid solution and deionized water is 1g:(10-30)mL:(100-300)mL; the concentration of citric acid solution is 1-3wt%.

[0011] (2) Weigh ammonium persulfate and dissolve it in an acetic acid aqueous solution with a pH of 3. Add aniline monomer under magnetic stirring and continue magnetic stirring for 30 to 60 minutes to obtain a polyaniline solution.

[0012] Preferably, the usage ratio of the ammonium persulfate, the acetic acid aqueous solution and the aniline is 1 g: (50-70) mL: (3-5) mL.

[0013] (3) Adding the polyaniline solution to the CeO2 sol, and then magnetically stirring for 1 to 3 hours; after standing for 1 to 3 hours, a composite sol is obtained.

[0014] Preferably, the usage ratio of the polyaniline solution to the CeO2 sol is 1 mL: (3-5) mL.

[0015] (4) The composite sol is mixed with a polyacrylate coating agent to prepare a composite coating agent.

[0016] Preferably, the usage ratio of the composite sol to the polyacrylate coating agent is 1 mL: (10-20) mL.

[0017] (5) Apply the composite coating agent on the surface of the polyester fabric and dry it at 70-80° C. for 3-5 hours.

[0018] (6) The polyester fabric is immersed in a benzenephosphonic acid solution at a temperature of 70 to 80° C. for a time of 2 to 4 hours, and then washed and dried to obtain an antistatic polyester fabric.

[0019] Preferably, the concentration of the phenylphosphonic acid solution is 0.1-0.3 wt %.

[0020] Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0021] (1) Polyaniline and CeO2 are conductive and can be used as materials for antistatic fabrics; however, they are difficult to adhere to the surface of fabrics. The present invention uses a polyacrylate coating agent as a carrier to creatively achieve the adhesion of polyaniline and CeO2 to polyester fabrics.

[0022] (2) The present invention uses phenylphosphonic acid as a dopant, and achieves a significant improvement in the conductivity of polyaniline through doping.

[0023] (3) Both polyaniline and CeO2 have electrical conductivity. When polyaniline or CeO2 is used alone, the electrical conductivity is slightly poor. When the two are used in combination, the electrical conductivity is significantly enhanced. The present invention uses aniline monomer polymerization to prepare a solution, which has good compatibility with CeO2 sol, thereby achieving the combination of polyaniline and CeO2 in the solution.

[0024] (4) According to the test method of GB 12014-2009, the point-to-point resistance of the antistatic polyester fabric prepared by the present invention reaches 2.5×10 6 ~3.2×10 6 Ω, the electric charge reaches 0.15-0.19μC / piece, reaching the A-level technical standard; after 20 washes, the point-to-point resistance and the electric charge do not change significantly, indicating that the polyester fabric prepared by the present invention has a stable antistatic function. DETAILED DESCRIPTION

[0025] Example 1

[0026] A method for preparing an antistatic polyester fabric is prepared by the following method:

[0027] (1) Weigh 2 g of Ce(NO3)3·6H2O and dissolve it in 400 mL of deionized water, then add 40 mL of 2 wt% citric acid solution; then adjust the pH of the solution to 4.5 and stir for 1.5 hours to obtain CeO2 sol.

[0028] (2) Weigh 1 g of ammonium persulfate and dissolve it in 60 mL of acetic acid aqueous solution with a pH of 3. Add 4 mL of aniline monomer under magnetic stirring and continue magnetic stirring for 45 minutes to obtain a polyaniline solution.

[0029] (3) Add 60 mL of polyaniline solution into 240 mL of CeO2 sol and stir magnetically for 2 h. After standing for 2 h, a composite sol is obtained.

[0030] (4) 10 mL of the composite sol was mixed with 150 mL of a polyacrylate coating agent to prepare a composite coating agent.

[0031] (5) The composite coating agent is applied to the surface of the polyester fabric and dried at 75° C. for 4 hours.

[0032] (6) The polyester fabric is immersed in a 0.2 wt % benzenephosphonic acid solution at a temperature of 75° C. for 3 h, and then washed and dried to obtain an antistatic polyester fabric a.

[0033] Example 2

[0034] A method for preparing an antistatic polyester fabric is prepared by the following method:

[0035] (1) Weigh 1 g of Ce(NO3)3·6H2O and dissolve it in 100 mL of deionized water, then add 10 mL of 1 wt% citric acid solution; then adjust the solution to pH 4 and stir for 1 hour to obtain CeO2 sol.

[0036] (2) Weigh 1 g of ammonium persulfate and dissolve it in 50 mL of acetic acid aqueous solution with a pH of 3. Add 3 mL of aniline monomer under magnetic stirring and continue magnetic stirring for 30 minutes to obtain a polyaniline solution.

[0037] (3) Add 50 mL of polyaniline solution into 150 mL of CeO2 sol and stir magnetically for 1 hour. After standing for 1 hour, a composite sol is obtained.

[0038] (4) 10 mL of the composite sol was mixed with 100 mL of the polyacrylate coating agent to prepare a composite coating agent.

[0039] (5) Apply the composite coating agent on the surface of the polyester fabric and dry it at 70°C for 3 hours.

[0040] (6) The polyester fabric is immersed in a 0.1 wt % benzenephosphonic acid solution at a temperature of 70° C. for 2 h, and then washed and dried to obtain an antistatic polyester fabric b.

[0041] Example 3

[0042] A method for preparing an antistatic polyester fabric is prepared by the following method:

[0043] (1) Weigh 2 g of Ce(NO3)3·6H2O and dissolve it in 600 mL of deionized water, then add 60 mL of 3 wt% citric acid solution; then adjust the solution pH to 5 and stir for 2 hours to obtain CeO2 sol.

[0044] (2) Weigh 1 g of ammonium persulfate and dissolve it in 70 mL of acetic acid aqueous solution with a pH of 3. Add 5 mL of aniline monomer under magnetic stirring and continue magnetic stirring for 60 min to obtain a polyaniline solution.

[0045] (3) 70 mL of polyaniline solution was added to 350 mL of CeO2 sol, and then magnetically stirred for 3 h. After standing for 3 h, a composite sol was obtained.

[0046] (4) 10 mL of the composite sol was mixed with 200 mL of the polyacrylate coating agent to prepare a composite coating agent.

[0047] (5) The composite coating agent is applied on the surface of the polyester fabric and dried at 80° C. for 5 hours.

[0048] (6) The polyester fabric is immersed in a 0.3 wt % benzenephosphonic acid solution at a temperature of 80° C. for 4 h, and then washed and dried to obtain an antistatic polyester fabric c.

[0049] Comparative Example A

[0050] Taking Example 1 as a comparison, in this comparative example A, CeO2 sol is not added, that is, step (1) is not implemented, and the other preparation methods are implemented according to the preparation method of Example 1 to obtain antistatic polyester fabric d.

[0051] Comparative Example B

[0052] Taking Example 1 as a comparison, in this comparative example B, polyaniline is not added, that is, step (2) is not implemented, and the other preparation methods are implemented according to the preparation method of Example 1 to obtain an antistatic polyester fabric e.

[0053] Comparative Example C

[0054] Taking Example 1 as a comparison, in this comparative example C, the polyester fabric is not doped with the phenylphosphonic acid solution, that is, step (6) is not implemented, and the other preparation methods are implemented according to the preparation method of Example 1 to obtain an antistatic polyester fabric f.

[0055] Performance evaluation test:

[0056] The antistatic polyester fabrics a, b, c, d, e and f prepared in the above-mentioned specific embodiments 1 to 3 and comparative examples A to C of the present invention are selected. The antistatic function test refers to GB 12014-2009 "Antistatic Clothing", and the point-to-point resistance and the amount of electric charge are used as antistatic function evaluation indicators. Among them, the point-to-point resistance refers to the test method of Appendix A of GB 12014-2009, and the amount of electric charge refers to the test method of Appendix B of GB 12014-2009, and the test conditions are: temperature: (20±5)℃, relative humidity: (35±5)%. The test results are shown in Table 1.

[0057] Table 1

[0058]

[0059]

[0060] As can be seen from Table 1, the point-to-point resistance and the amount of electric charge of the antistatic polyester fabrics a, b, c, d, e and f prepared by Examples 1 to 3 and Comparative Examples A to C are compared, and it can be seen that Examples 1 to 3 are significantly better than Comparative Examples A to C in terms of antistatic index. The performance evaluation test results show that the addition of CeO2 sol, the addition of polyaniline and the doping finishing of phenylphosphonic acid solution all have an important influence on the antistatic function of polyester fabrics.

Claims

1. A method for preparing an antistatic polyester fabric, characterized in that: The preparation method comprises the following steps: (1) Weighing Ce(NO3)3·6H2O and dissolving it in deionized water, adding citric acid solution; then adjusting the pH of the solution to 4-5, stirring for 1-2 hours, and preparing CeO2 sol; (2) Weighing ammonium persulfate, dissolving it in an acetic acid aqueous solution with a pH of 3, adding aniline monomer under magnetic stirring, and continuing magnetic stirring for 30 to 60 minutes to obtain a polyaniline solution; (3) adding the polyaniline solution to the CeO2 sol, and then magnetically stirring for 1 to 3 hours; after standing for 1 to 3 hours, a composite sol is obtained; (4) mixing the composite sol with a polyacrylate coating agent to prepare a composite coating agent; (5) applying the composite coating agent on the surface of the polyester fabric and drying at 70 to 80° C. for 3 to 5 hours; (6) immersing the polyester fabric in a benzenephosphonic acid solution at a temperature of 70 to 80° C. for 2 to 4 hours, then washing and drying to obtain an antistatic polyester fabric; The concentration of the phenylphosphonic acid solution in step (6) is 0.1 to 0.3 wt %.

2. The method for preparing an antistatic polyester fabric according to claim 1, characterized in that: The usage ratio of Ce(NO3)3·6H2O, citric acid solution and deionized water in step (1) is 1g: (10-30)mL: (100-300)mL; the concentration of citric acid solution is 1-3wt%.

3. The method for preparing an antistatic polyester fabric according to claim 1, characterized in that: The usage ratio of the ammonium persulfate, the acetic acid aqueous solution and the aniline in step (2) is 1 g: (50-70) mL: (3-5) mL.

4. The method for preparing an antistatic polyester fabric according to claim 1, characterized in that: The usage ratio of the polyaniline solution to the CeO2 sol in step (3) is 1 mL: (3-5) mL.

5. The method for preparing an antistatic polyester fabric according to claim 1, characterized in that: The usage ratio of the composite sol to the polyacrylate coating agent in step (4) is 1 mL: (10-20) mL. 6.An antistatic 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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