Preparation method of PPy / Fe2O3 / cotton flexible composite material with ultraviolet aging resistance function

Abstract

The invention discloses a preparation method of a PPy / Fe2O3 / cotton flexible composite material with an ultraviolet aging resistance function, and belongs to the technical field of textile materials. The PPy / Fe2O3 / cotton flexible composite material is prepared by taking the flexible cotton fabric which is thin in thickness and good in air and moisture permeability as base cloth and adopting a two-step method with a simple process, PPy and Fe2O3 are attached to the surface of the cotton fabric, so that the surface resistance of the fabric is improved, the ultraviolet transmittance is reduced, and the composite material has an excellent protection coefficient, has ultraviolet-proof and ultraviolet aging-resistant functions, and can be applied to the field of medical equipment. The wide application prospect of PPy and Fe2O3 in enhancing the ultraviolet resistance and the ultraviolet aging resistance of the material is shown.

Description

Technical Field

[0001] The invention belongs to the technical field of textile materials, and specifically relates to a PPy / Fe 2 O 3 Preparation method of / cotton flexible composite material. Background Art

[0002] There are three types of ultraviolet radiation reaching the earth's surface. High-frequency short-wave ultraviolet rays are generally blocked by the ozone layer, medium-wave ultraviolet rays reach the surface of the skin, and long-wave ultraviolet rays penetrate deeper into the skin, causing serious harm to human health, such as erythema, sunburn, psoriasis, skin cancer, etc. Therefore, it is particularly important to develop efficient and stable ultraviolet protection materials. However, pure cotton fabrics have a high transmittance to long-wave ultraviolet rays and medium-wave ultraviolet rays, and their ultraviolet protection performance is poor.

[0003] Polypyrrole (PPy) has the characteristics of good environmental stability, low cost, easy preparation, and high electrical conductivity, and has high potential application value in the field of UV protection; Fe 2 O 3 It is a semiconductor material with good weather resistance, light resistance, non-toxicity and environmental stability, and has good absorption and shielding effects on ultraviolet rays. It is an important functional material.

[0004] The present invention aims to provide a PPy / Fe composite material with UV aging resistance. 2 O 3 Preparation method of PPy / Fe / cotton flexible composite materials. Using thin and flexible cotton fabric with good air permeability and moisture permeability as the base fabric, a two-step method was used to prepare PPy / Fe 2 O 3 / cotton flexible composites, PPy and Fe 2 O 3 Attaching to the surface of cotton fabric increases the thickness, weight and density of the fabric, reduces the UV transmittance, and makes the composite material have both UV protection and UV aging resistance functions. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention aims to provide a PPy / Fe 2 O 3 Preparation method of / cotton flexible composite material.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A PPy / Fe with UV-resistant aging function 2 O 3 / cotton flexible composite material, the preparation method is as follows:

[0008] Fe 2 O 3 / Preparation of cotton fabric: First, pre-treat the cotton fabric; then take a certain amount of FeSO 4 7H 2 O and tannic acid were added with appropriate amount of distilled water to fully dissolve them. 4 -7H 2 Pour the O solution into the tannic acid solution and mix thoroughly to prepare a certain concentration of FeSO 4 7H 2 O and tannic acid mixed solution; then immerse the cotton fabric in the above mixed solution for 2 to 4 hours, and then immerse it in a certain concentration of NaOH solution for 5 to 10 minutes; finally take it out and dry it, wash it with clean water, dry it again and set it aside.

[0009] Preparation of the required solution: Take a certain amount of pyrrole monomer, add distilled water to fully dissolve it, and prepare a pyrrole monomer solution of a certain concentration; take a certain amount of FeCl 3 -6H 2 O (as oxidant and dopant), add distilled water to fully dissolve it, and prepare a ferric chloride solution of a certain concentration.

[0010] PPy / Fe 2 O 3 Preparation of Fe / cotton flexible composites: 2 O 3 After the cotton fabric is wetted, it is placed in the pyrrole monomer solution and continuously stirred for 10 to 30 minutes. Then, the ferric chloride solution is slowly added dropwise and continuously stirred for 50 to 70 minutes. After the reaction is completed, it is repeatedly washed with clean water and anhydrous ethanol, and dried at 50 to 70 ° C to obtain PPy / Fe 2 O 3 / cotton flexible composite material.

[0011] Advantages of the technical solution of the present invention:

[0012] (1) In the present invention, flexible cotton fabric is used as the base fabric, and PPy and Fe are synthesized by a sol-gel method and an in-situ polymerization method in two steps. 2 O 3 It is attached to the surface of cotton fabric, with simple process and easy operation.

[0013] (2) The PPy used in the present invention is low in cost, easy to prepare, and has high conductivity; Fe 2 O 3 It is a semiconductor material with good absorption and shielding effects on ultraviolet rays. After being attached to cotton fabric, the ultraviolet transmittance of the fabric is significantly reduced, and the protection factor is excellent. PPy / Fe with both ultraviolet protection and ultraviolet aging resistance is obtained. 2 O3 / cotton flexible composite material.

[0014] In conclusion, this invention has great significance for the future development of ultraviolet protection materials and the application of PPy and Fe 2 O 3 Provide reference and reference for innovative applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 PPy / Fe in the present invention 2 O 3 / cotton flexible composite material preparation process diagram.

[0016] Figure 2 PPy / Fe in the present invention 2 O 3 Surface resistance diagram of / cotton flexible composites.

[0017] Figure 3 PPy / Fe in the present invention 2 O 3 / cotton flexible composite material UV protection test data chart.

[0018] Figure 4 PPy / Fe in the present invention 2 O 3 UV aging resistance test data of cotton / cotton flexible composite materials. DETAILED DESCRIPTION

[0019] The terms used in the present invention, unless otherwise specified, generally have the meanings commonly understood by those of ordinary skill in the art.

[0020] The present invention is further described in detail below in conjunction with specific examples and with reference to data. The following examples are only intended to illustrate the present invention and are not intended to limit the scope of the present invention in any way.

[0021] Unless otherwise specified, the materials and reagents used in the following examples can be obtained from commercial sources.

[0022] Embodiment 1:

[0023] A PPy / Fe with UV-resistant aging function 2 O 3 / cotton flexible composite material, the preparation method is as follows:

[0024] Fe 2 O 3Preparation of cotton fabric: First, pre-treat the cotton fabric with a bath ratio of 1:30. Take a certain amount of NaOH and prepare a 1 mol / L NaOH solution. Place it in a water bath and adjust the temperature to 70°C. Immerse the cotton fabric in the water bath for 30 minutes, then wash it with clean water until it is neutral, take it out and dry it in a 60°C oven for later use. 2 O 3 / cotton fabric, the experimental bath ratio is 1:20. Take a certain amount of FeSO 4 7H 2 O and tannic acid with a concentration of 50 g / L were added with appropriate amount of distilled water to fully dissolve them. 4 7H 2 Pour the O solution into the tannic acid solution and mix thoroughly to prepare a certain concentration of FeSO 4 7H 2 O and tannic acid mixed solution; the pretreated cotton fabric was immersed in the above mixed solution for 3 hours, and then immersed in NaOH solution for 10 minutes, taken out and dried at 80°C, washed twice with clean water, and dried again for use.

[0025] Preparation of required solution: The experimental bath ratio is 1:20. Take a certain amount of pyrrole monomer, add distilled water to fully dissolve it, and prepare a 0.4 mol / L pyrrole monomer solution; take a certain amount of FeCl 3 6H 2 O, the molar ratio of which to pyrrole is 1:1, and then distilled water is added to fully dissolve it to prepare a ferric chloride solution of a certain concentration.

[0026] PPy / Fe 2 O 3 Preparation of Fe / cotton flexible composites: 2 O 3 After the cotton fabric was wetted, it was placed in the pyrrole monomer solution and continuously stirred for 20 minutes. Then, the ferric chloride solution was slowly added dropwise at a reaction temperature of 25°C and stirred for 60 minutes. After the reaction was completed, it was repeatedly washed with clean water and anhydrous ethanol and dried at 60°C to obtain PPy / Fe 2 O 3 / cotton flexible composite material.

[0027] PPy / Fe 2 O 3 Characterization of flexible composite materials:

[0028] UV aging resistance test: PPy / Fe in Example 1 2 O 3 The / cotton flexible composite material was placed in an ultraviolet light with a wavelength of 340nm, a blackboard temperature of 60℃, and an irradiance of 0.89W / m2 After irradiation for 8 hours in the test chamber, the treated PPy / Fe 2 O 3 Transmission of long-wave ultraviolet and medium-wave ultraviolet rays by / cotton flexible composite materials Figure 4 As shown, both are 0.03%. After the samples were irradiated with ultraviolet light, Figure 3 There is no significant change in the protection factor and transmittance. Therefore, it can be seen that the above irradiation conditions have no significant effect on the PPy / Fe prepared in this experiment. 2 O 3 / cotton flexible composite materials have little impact, and their UV protection performance can meet the requirements of use under long-term irradiation conditions.

[0029] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A PPy / Fe2O3 / cotton flexible composite material with UV aging resistance, characterized in that: The preparation method is as follows: Preparation of Fe2O3 / cotton fabric: first, pretreat the cotton fabric; secondly, take a certain amount of FeSO4·7H2O and tannic acid, add appropriate amount of distilled water to fully dissolve them respectively, pour the FeSO4·7H2O solution into the tannic acid solution and mix them thoroughly to prepare a mixed solution of FeSO4·7H2O and tannic acid with a certain concentration; then, soak the cotton fabric in the above mixed solution for 2 to 4 hours, and then soak it in a certain concentration of NaOH solution for 5 to 10 minutes; finally, take out and dry, wash with clean water, dry again and set aside. Preparation of the required solution: take a certain amount of pyrrole monomer, add distilled water to fully dissolve it, and prepare a pyrrole monomer solution of a certain concentration; take a certain amount of FeCl3·6H2O (as an oxidant and dopant), add distilled water to fully dissolve it, and prepare a ferric chloride solution of a certain concentration. Preparation of PPy / Fe2O3 / cotton flexible composite materials: After wetting the Fe2O3 / cotton fabric, place it in a pyrrole monomer solution, stir it continuously, and adsorb it for 10 to 30 minutes. Then slowly add ferric chloride solution, stir it continuously and react for 50 to 70 minutes. After the reaction is completed, wash it repeatedly with clean water and anhydrous ethanol, and dry it at 50 to 70°C to obtain a PPy / Fe2O3 / cotton flexible composite material.

2. The PPy / Fe2O3 / cotton flexible composite material with UV aging resistance according to claim 1, characterized in that: The pyrrole concentration is 0.3-0.5 mol / L.

3. A PPy / Fe2O3 / cotton flexible composite material having UV aging resistance obtained as described in any one of claims 1-2.

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