Preparation method of polypyrrole / polyaniline / wool felt composite fabric with sound absorption, heat insulation and infrared stealth functions
By in-situ polymerization of polypyrrole and polyaniline on wool felt, the problems of single function of wool felt and poor performance of conductive polymer composites are solved, and a composite fabric with low thermal conductivity, high infrared stealth and good sound absorption properties is prepared to meet the needs of high-tech applications.
Patent Information
- Application Number
- CN202511388875.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-26
- Publication Date
- 2025-11-14
AI Technical Summary
In existing technologies, wool felt has a single function, which makes it difficult to meet the demand for multi-functional integration in high-tech application scenarios. Traditional conductive polymer composite materials have problems such as poor mechanical properties, difficult processing and high cost, and lack systematic control over the thermal conductivity, infrared stealth and sound absorption properties of composite materials.
By uniformly depositing polypyrrole and polyaniline on wool felt through in-situ polymerization, a polypyrrole/polyaniline/wool felt composite fabric with low thermal conductivity, high infrared stealth performance and good sound absorption performance is prepared, simplifying the preparation process and reducing costs.
It achieves the integration of multifunctional textile materials, maintains the softness and breathability of wool felt, reduces production costs, and improves the material's infrared stealth and sound absorption properties.
Smart Images
Figure CN120945666A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of textile materials technology, and specifically relates to a method for preparing a polypyrrole / polyaniline / wool felt composite fabric that combines sound absorption, heat insulation and infrared stealth functions. Background Technology
[0002] With the rapid development of modern technology in fields such as military protection, smart wearables, and specialized industries, the demand for multifunctional smart textile materials is becoming increasingly urgent. Traditional textiles often have limited functionality and are unable to meet the comprehensive application requirements in complex environments.
[0003] Wool felt, as a natural protein fiber material, possesses natural breathability, flexibility, and certain basic heat insulation and sound absorption properties due to its porous structure formed by interwoven fibers. Furthermore, it has a wide range of raw material sources and good environmental compatibility. However, its inherently limited functionality makes it difficult to meet the requirements of multifunctional material integration in high-tech applications. Therefore, new functions are often imparted to wool felt through surface modification or polymer composites.
[0004] Polypyrrole and polyaniline, as typical conductive polymers, have shown great potential in electromagnetic shielding, infrared stealth, and microwave absorption due to their unique π-conjugated systems, and have been widely used in the development of functional textiles. However, single conductive polymers suffer from poor mechanical properties and processing difficulties, limiting their practical applications. Composites of conductive polymers with flexible substrates have become an effective way to improve the overall performance of materials. In existing technologies, although there are research reports on conductive polymer / fiber composites, most studies focus on the deposition of single conductive components, and there is a lack of systematic research on the synergistic regulation of the thermal conductivity, infrared stealth, and sound absorption properties of the composites. In addition, traditional preparation methods are characterized by complex processes and high costs.
[0005] To address the aforementioned problems, this invention proposes a method for preparing a polypyrrole / polyaniline / wool felt composite fabric that combines sound absorption, heat insulation, and infrared stealth functions. The aim is to produce a multifunctional polypyrrole / polyaniline / wool felt composite fabric with low thermal conductivity, high infrared stealth performance, and good sound absorption performance through a simple preparation process, providing a new approach for the development of high-performance smart textiles. Summary of the Invention
[0006] To address the shortcomings of existing technologies, this invention provides a method for preparing polypyrrole / polyaniline / wool felt composite fabrics. By using in-situ polymerization, pyrrole and aniline are uniformly polymerized on a wool felt substrate, resulting in a composite fabric that combines low thermal conductivity, high infrared stealth performance, and good sound absorption performance. At the same time, the preparation process is simplified, production costs are reduced, and the needs of multiple fields for multifunctional textile materials are met.
[0007] To achieve the above objectives, the technical solution of the present invention is as follows: A method for preparing a polypyrrole / polyaniline / wool felt composite fabric with sound absorption, heat insulation, and infrared stealth functions includes the following steps: S1. Preparation of the base fabric: Cut the wool felt fabric into experimental samples to serve as the base fabric; S2. Solution preparation: Weigh appropriate amounts of pyrrole and aniline monomers, add distilled water, and stir continuously at room temperature until the pyrrole and aniline monomers are completely dissolved to prepare a pyrrole / aniline solution of a certain concentration; weigh appropriate amounts of ferric chloride, add distilled water to completely dissolve it to prepare a ferric chloride oxidant / dopant solution. S3. Preparation of composite fabric: At room temperature, the wetted wool felt fabric is immersed in a pyrrole / aniline mixed solution to fully adsorb pyrrole and aniline monomers for a period of time. Then, the wool felt fabric is lifted from the beaker with a glass rod, and the prepared ferric chloride solution is added dropwise to the adsorption solution. After stirring thoroughly, the wool felt fabric is put back into the solution to allow the pyrrole and aniline to undergo a polymerization reaction, generating polypyrrole and polyaniline on the wool felt fabric. After reacting for 30-80 minutes, the fabric is taken out, rinsed with distilled water, and air-dried naturally.
[0008] Preferably, in S2, the molar ratio of pyrrole to aniline is 1:1, the concentration of the pyrrole / aniline solution is 0.7~1.5 mol / L, and the molar ratio of ferric chloride to aniline and pyrrole is 1:1.
[0009] Preferably, the adsorption time in S3 is 10~35 min.
[0010] Compared with the prior art, the present invention has the following advantages: (1) The present invention prepares a polypyrrole / polyaniline / wool felt composite fabric by uniformly depositing polypyrrole and polyaniline on a wool felt substrate through in-situ polymerization, thereby achieving the integration of multiple functions and retaining the original advantages of wool felt such as softness, breathability, and lightweight for comfortable wear.
[0011] (2) The wool felt selected in this invention is a natural fiber material with good biodegradability and renewability. At the same time, the preparation process of conductive polymers polypyrrole and polyaniline is relatively environmentally friendly, reducing the emission of harmful substances. Attached Figure Description
[0012] Figure 1 This is a flowchart illustrating the preparation process of the polypyrrole / polyaniline / wool felt composite fabric in this invention.
[0013] Figure 2 This is a diagram showing the sound absorption coefficient of the polypyrrole / polyaniline / wool felt composite fabric in this invention.
[0014] Figure 3This is a diagram showing the thermal conductivity of the polypyrrole / polyaniline / wool felt composite fabric in this invention.
[0015] Figure 4 This is a far-infrared emissivity diagram of the polypyrrole / polyaniline / wool felt composite fabric of the present invention. Detailed Implementation
[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example
[0017] The preparation method of polypyrrole / polyaniline / wool felt composite fabric includes the following steps: Step 1: Cut the wool felt fabric into 12*12 cm samples to use as the base fabric; Step 2: Weigh an appropriate amount of pyrrole and aniline monomers, add distilled water, and stir continuously at room temperature until the pyrrole and aniline monomers are completely dissolved to prepare a pyrrole / aniline solution of a certain concentration; weigh an appropriate amount of ferric chloride, add distilled water to completely dissolve it, and prepare a ferric chloride oxidant / dopant solution. Step 3: At room temperature, immerse the moistened wool felt fabric in a pyrrole / aniline mixed solution to fully adsorb the pyrrole and aniline monomers for a period of time. Then, use a glass rod to lift the wool felt fabric from the beaker and add the prepared ferric chloride solution dropwise to the adsorption solution. After stirring thoroughly, put the wool felt fabric back into the solution to allow the pyrrole and aniline to undergo a polymerization reaction, generating polypyrrole and polyaniline on the wool felt fabric. After reacting for 60 minutes, remove the fabric, rinse it with distilled water, and air dry it naturally.
[0018] The above description is merely a preferred embodiment of the present invention and is only used to help understand the method and core essence of the present invention. However, the scope of protection of the present invention is not limited thereto. For those skilled in the art, within the technical scope disclosed in the present invention, any equivalent substitutions or modifications made according to the technical solution and inventive concept of the present invention should be covered within the scope of protection of the present invention. In summary, the content of this specification should not be construed as a limitation of the present invention.
Claims
1. A method for preparing polypyrrole / polyaniline / wool felt composite fabric, characterized in that, Includes the following steps: S1. Preparation of the base fabric: Cut the wool felt fabric into experimental samples to serve as the base fabric; S2. Solution preparation: Weigh appropriate amounts of pyrrole and aniline monomers, add distilled water, and stir continuously at room temperature until the pyrrole and aniline monomers are completely dissolved to prepare a pyrrole / aniline solution of a certain concentration; weigh appropriate amounts of ferric chloride, add distilled water to completely dissolve it to prepare a ferric chloride oxidant / dopant solution. S3. Preparation of composite fabric: At room temperature, the wetted wool felt fabric is immersed in a pyrrole / aniline mixed solution to fully adsorb pyrrole and aniline monomers for a period of time. Then, the wool felt fabric is lifted from the beaker with a glass rod, and the prepared ferric chloride solution is added dropwise to the adsorption solution. After stirring thoroughly, the wool felt fabric is put back into the solution to allow the pyrrole and aniline to undergo a polymerization reaction, generating polypyrrole and polyaniline on the wool felt fabric. After reacting for 30-80 minutes, the fabric is taken out, rinsed with distilled water, and air-dried naturally.
2. The method for preparing polypyrrole / polyaniline / wool felt composite fabric according to claim 1, characterized in that, In S2, the molar ratio of pyrrole to aniline is 1:1, the concentration of the pyrrole / aniline solution is 0.7~1.5 mol / L, and the molar ratio of ferric chloride to aniline and pyrrole is 1:
1.
3. The method for preparing polypyrrole / polyaniline / wool felt composite fabric according to claim 1, characterized in that, The adsorption time in S3 is 10~35 min.