Preparation method of poly (3, 4-ethylenedioxythienyl) conductive cotton

Abstract

The invention discloses a preparation method of poly (3, 4-ethylenedioxythienyl) conductive cotton, and relates to a textile material technology. The preparation method comprises the following steps: putting a cotton fabric into a sodium hydroxide solution, treating for 2-3 hours under a water bath condition, washing with distilled water, and drying. Then preparing a solution of 3, 4-ethylenedioxythiophene, a ferric trichloride doping agent and a copper chloride oxidizing agent; under the water bath condition of 50-80 DEG C, the wetted fabric is infiltrated in a 3, 4-ethylenedioxythiophene solution, a 3, 4-ethylenedioxythiophene monomer is fully adsorbed for a period of time, then a prepared oxidant and dopant solution is dropwise added into the adsorption solution at a fixed frequency, the dropwise adding time is controlled, the fabric is continuously stirred, a polymerization reaction is performed under the water bath condition, and the 3, 4-ethylenedioxythiophene is obtained. After full reaction for a certain time, taking out the fabric, washing the fabric with distilled water, and naturally airing the fabric. The prepared conductive cotton fabric has the softness of the cotton fabric and the high conductivity of the poly (3, 4-ethylenedioxythiophene), is excellent in conductivity and has a good application prospect.

Description

Technical Field

[0001] The invention belongs to the technical field of textile materials, and particularly relates to a method for preparing poly 3,4-ethylenedioxythiophene-based conductive cotton. Background Art

[0002] With the continuous development of electronic technology, conductive materials are increasingly used in various fields. Although traditional conductive materials such as metals and carbon materials have excellent conductivity, their application is limited in certain specific fields, such as electromagnetic shielding and wave absorbing materials. Therefore, the development of new conductive materials, especially conductive materials with good conductivity and excellent flexibility, has important practical significance and research value.

[0003] As a common natural fiber material, cotton fabric has the advantages of light weight, softness and breathability, and is widely used in clothing, home furnishing and other fields. However, cotton fabric itself does not have conductivity, which limits its application in occasions where conductive properties are required. In order to expand the application range of cotton fabric, researchers began to try to deposit conductive substances on the surface of cotton fabric to give it conductive properties. Poly (3,4-ethylenedioxythiophene) (PEDOT) is an organic conductive polymer with high conductivity, high transparency and good stability, which is widely used in electronic devices, sensors, solar cells and other fields. Combining PEDOT with cotton fabric can prepare a composite material that has both the excellent properties of cotton fabric and the excellent conductive properties of PEDOT. This composite material not only has good conductive properties, but also maintains the flexibility, breathability and biocompatibility of cotton fabric, so it has broad application prospects. Through a specific preparation method, PEDOT can be uniformly deposited on the surface of cotton fabric to form a conductive layer, thereby giving cotton fabric conductive properties. However, most of the current methods for preparing conductive cotton fabrics have problems such as complex preparation process and unstable conductive properties. Therefore, it is of great research significance to develop a preparation method for PEDOT / cotton composite conductive materials with simple preparation process and excellent conductive properties.

[0004] In view of the above problems, the present invention proposes a method for preparing poly (3,4-ethylenedioxythiophene)-based conductive cotton, aiming to prepare a PEDOT / cotton composite material with high conductivity through a simple preparation process, thereby providing new ideas and methods for the development and application of conductive cotton fabrics. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a method for preparing poly (3,4-ethylenedioxythiophene)-based conductive cotton, which imparts excellent conductive properties to cotton fabric by in-situ polymerization of poly (3,4-ethylenedioxythiophene) (PEDOT) on the surface of cotton fabric.

[0006] To achieve the above purpose, the technical solution of the present invention is as follows:

[0007] The preparation method of poly 3,4-ethylenedioxythiophene-based conductive cotton comprises the following steps:

[0008] S1. Treatment of base fabric: Place cotton fabric in 0.5-5 mol / L sodium hydroxide solution and treat in a water bath at 50-70°C for 2-3 hours. Then, take out the cotton fabric, rinse it repeatedly with distilled water, and dry it in an oven.

[0009] S2. Preparation of solution: Weigh 3,4-ethylenedioxythiophene monomer, add distilled water, and place it in a magnetic stirrer and stir for 10 minutes to fully dissolve it to prepare a 3,4-ethylenedioxythiophene solution; weigh ferric chloride hexahydrate solid, add distilled water to completely dissolve it, and prepare a ferric chloride dopant solution; weigh cupric chloride oxidant solid, add distilled water to completely dissolve it, and prepare an oxidant solution.

[0010] S3. Preparation of conductive fabric: In a water bath at 50-80°C, the wetted fabric is immersed in 3,4-ethylenedioxythiophene solution to fully adsorb 3,4-ethylenedioxythiophene monomer for a period of time, and then the prepared oxidant and dopant solutions are added to the adsorption liquid at a fixed frequency, and the dropping time is controlled to 10-20 minutes. The fabric is continuously stirred and a polymerization reaction is carried out in a water bath to generate poly 3,4-ethylenedioxythiophene. After sufficient reaction for a certain period of time, the fabric is taken out, rinsed with distilled water, and dried naturally.

[0011] Preferably, the concentration of 3,4-ethylenedioxythiophene in S2 is 0.05-2 mol / L, and the molar ratio of 3,4-ethylenedioxythiophene, ferric chloride hexahydrate and cupric chloride is 2:3:3.

[0012] Preferably, in S3, the bath ratio is 1:30-70, the adsorption time is 5-30 min, the water bath temperature is 40-80° C., and the reaction time is 0.5-5 h.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention provides a method for preparing poly 3,4-ethylenedioxythiophene-based conductive cotton with simple preparation process and excellent conductive performance. By combining the softness of cotton fabric and the excellent conductive performance of 3,4-ethylenedioxythiophene, the material can not only provide good conductivity but also maintain the flexibility of the material. The cotton fabric substrate has good softness and can adapt to various complex application environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a flow chart for preparing poly 3,4-ethylenedioxythiophene-based conductive cotton;

[0016] Figure 2 is the conductivity value of the poly-3,4-ethylenedioxythiophene-based conductive cotton in the present invention;

[0017] Figure 3 This is a physical picture of the poly (3,4-ethylenedioxythiophene) based conductive cotton in the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Embodiment 1:

[0020] The preparation method of poly 3,4-ethylenedioxythiophene-based conductive cotton comprises the following steps:

[0021] Step 1: Place the cotton fabric in a 1 mol / L sodium hydroxide solution and treat it in a water bath at 60°C for 1.5 hours. Then, take out the cotton fabric, rinse it repeatedly with distilled water, and dry it in an oven.

[0022] Step 2: Weigh 3,4-ethylenedioxythiophene monomer, add distilled water, and place it in a magnetic stirrer and stir for 10 minutes to fully dissolve it to prepare a 3,4-ethylenedioxythiophene solution; weigh ferric chloride hexahydrate solid, add distilled water to completely dissolve it, and prepare a ferric chloride dopant solution; weigh cupric chloride oxidant solid, add distilled water to completely dissolve it, and prepare an oxidant solution.

[0023] Step 3: In a water bath at 60°C, the moistened fabric is immersed in 3,4-ethylenedioxythiophene solution to fully adsorb 3,4-ethylenedioxythiophene monomer for a period of time, and then the prepared oxidant and dopant solutions are added to the adsorption liquid at a fixed frequency, and the dropping time is controlled to 15 minutes. The fabric is continuously stirred and a polymerization reaction is carried out in a water bath at 60°C to generate poly 3,4-ethylenedioxythiophene. After a certain period of sufficient reaction, the fabric is taken out, rinsed with distilled water, and dried naturally.

[0024] The above is only a preferred embodiment of the present invention, which is only used to help understand the method of the present invention and its core essence, but the protection scope of the present invention is not limited thereto. For those skilled in the art in the art, equivalent replacement or change according to the technical solution and inventive concept of the present invention within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for preparing poly 3,4-ethylenedioxythiophene-based conductive cotton, characterized in that: The steps include: S1. Treatment of base fabric: Place cotton fabric in 0.5-5 mol / L sodium hydroxide solution and treat in a water bath at 50-70°C for 2-3 hours. Then, take out the cotton fabric, rinse it repeatedly with distilled water, and dry it in an oven. S2. Preparation of solution: Weigh 3,4-ethylenedioxythiophene monomer, add distilled water, and place it in a magnetic stirrer and stir for 10 minutes to fully dissolve it to prepare a 3,4-ethylenedioxythiophene solution; weigh ferric chloride hexahydrate solid, add distilled water to completely dissolve it, and prepare a ferric chloride dopant solution; weigh cupric chloride oxidant solid, add distilled water to completely dissolve it, and prepare an oxidant solution. S3. Preparation of conductive fabric: In a water bath at 50-80°C, the wetted fabric is immersed in 3,4-ethylenedioxythiophene solution to fully adsorb 3,4-ethylenedioxythiophene monomer for a period of time, and then the prepared oxidant and dopant solutions are added to the adsorption liquid at a fixed frequency, and the dropping time is controlled to 10-20 minutes. The fabric is continuously stirred and a polymerization reaction is carried out in a water bath to generate poly 3,4-ethylenedioxythiophene. After sufficient reaction for a certain period of time, the fabric is taken out, rinsed with distilled water, and dried naturally.

2. The method for preparing poly 3,4-ethylenedioxythiophene-based conductive cotton according to claim 1, characterized in that: The concentration of 3,4-ethylenedioxythiophene in the S2 is 0.05-2 mol / L, and the molar ratio of 3,4-ethylenedioxythiophene, ferric chloride hexahydrate and cupric chloride is 2:3:

3.

3. The method for preparing poly 3,4-ethylenedioxythiophene-based conductive cotton according to claim 1, characterized in that: The bath ratio in S3 is 1:30-70, the adsorption time is 5-30 min, the water bath temperature is 40-80° C., and the reaction time is 0.5-5 h.

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