Multifunctional anti-electromagnetic radiation carbonized fabric and preparation method thereof
By combining pure cotton fabric with Ti3CNTx and performing high-temperature annealing, combined with PDMS spraying, the problem of poor anti-electromagnetic radiation shielding effect of traditional metal material fabrics was solved, and lightweight, soft, breathable, anti-electromagnetic radiation, electric heat conversion and waterproof were prepared. Functional carbonized cotton fabrics significantly improve the overall performance of the fabric.
Patent Information
- Application Number
- CN202411477121.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-01-03
AI Technical Summary
Traditional metal fabrics have poor shielding effects in resisting electromagnetic radiation, and are expensive and heavy, making them difficult to meet human protection needs.
The pure cotton fabric is combined with Ti3CNTx by dip coating, and carbonizes it through high-temperature annealing. Combined with PDMS spraying to improve conductivity and electromagnetic radiation resistance, and lightweight, soft, breathable, electromagnetic radiation resistance, electric heat conversion and waterproof Carbonized cotton fabric.
It significantly improves the electromagnetic radiation resistance of the fabric and achieves a comprehensive improvement in lightweight, soft, breathable, electric heat conversion and waterproof functions.
Smart Images
Figure CN119243469A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of protective textiles, and in particular relates to a method for preparing a multifunctional anti-electromagnetic radiation carbonized fabric, and also relates to the fabric prepared by the preparation method. Background Art
[0002] With the development of communication technology, the problem of electromagnetic radiation is becoming increasingly serious. On the one hand, it causes electromagnetic interference that affects the performance of electronic products, and on the other hand, it causes serious harm to human health. Anti-electromagnetic radiation fabrics are an effective means of human protection, but traditional metal fabrics have problems such as high price, heavy weight, and poor shielding effect. Summary of the invention
[0003] The purpose of the invention is to provide a method for preparing a multifunctional anti-electromagnetic radiation carbonized fabric, which solves the problem that the existing metal material fabric has a poor shielding effect.
[0004] Another object of the present invention is to provide a fabric prepared by the method for preparing the multifunctional anti-electromagnetic radiation carbonized fabric.
[0005] The technical solution adopted by the present invention is a method for preparing a multifunctional anti-electromagnetic radiation carbonized fabric, which is specifically implemented according to the following steps: Step 1, soaking and desizing the pure cotton fabric; Step 2, immersing the desized fabric in the monodispersed liquid by an immersion method and drying; Step 3, the dried fabric is placed in a tube furnace for heating and then annealing; Step 4, spraying polydimethylsiloxane on the fabric treated in step 3 and then drying it.
[0006] The present invention is also characterized in that: In step 1, the pure cotton fabric is immersed in a mixture of 10 g / L NaOH and 1 g / L fatty alcohol polyoxyethylene ether for desizing, with a bath ratio of 1:30, and maintained at 100° C. for 30 minutes.
[0007] In step 2, the desized fabric was immersed in a 5 mg / mL Ti3CNTx monodispersion solution for 5 min, and then dried in a vacuum drying oven at 60°C for 1 h. The soaking and drying cycle was repeated 5-20 times, and the fabric was weighed to calculate the loading amount.
[0008] In step 3, the tube furnace is heated to 400°C-800°C at a rate of 5°C / min in a nitrogen atmosphere, maintained for 2 hours, and then annealed at a rate of 5°C / min to room temperature.
[0009] In step 4, after spraying, the coating is dried at 80°C for 6 hours.
[0010] Another technical solution adopted by the present invention is to prepare the fabric by adopting the preparation method of the multifunctional anti-electromagnetic radiation carbonized fabric.
[0011] The beneficial effects of the present invention are: The present invention utilizes a dip-coating method to combine positively charged cotton fabric and negatively charged Ti3CNTx with van der Waals force, and then undergoes high-temperature annealing. On the one hand, the cotton fabric is carbonized to produce conductivity and has an anti-electromagnetic radiation function. On the other hand, the conductivity, anti-electromagnetic radiation and electrothermal conversion performance of Ti3CNTx are greatly improved after high-temperature annealing, thereby improving the anti-electromagnetic radiation performance of the fabric. Finally, PDMS is used to spray the fabric to obtain a carbonized cotton fabric that is lightweight, soft, breathable, anti-electromagnetic radiation, electrothermal conversion and waterproof. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is an electron microscope scanning image of the multifunctional anti-electromagnetic radiation carbonized fabric prepared in Example 1 of the present invention; Figure 2 is an electron microscope scanning image of the multifunctional anti-electromagnetic radiation carbonized fabric prepared in Example 2 of the present invention; Figure 3 This is an electron microscope scanning image of the multifunctional anti-electromagnetic radiation carbonized fabric prepared in Example 3 of the present invention. DETAILED DESCRIPTION
[0013] The present invention is described in detail below in conjunction with specific implementation modes and accompanying drawings.
[0014] The preparation method of the multifunctional anti-electromagnetic radiation carbonized fabric of the present invention is specifically implemented according to the following steps: Step 1, soaking and desizing the pure cotton fabric; In step 1, the pure cotton fabric is desized by soaking in a mixture of 10 g / L NaOH and 1 g / L fatty alcohol–polyoxyethylene ether (JFC) at a bath ratio of 1:30 and maintaining at 100° C. for 30 min; Step 2, immersing the desized fabric in the monodispersed liquid by an immersion method and drying; In step 2, the desized fabric was immersed in a 5 mg / mL Ti3CNTx monodispersion solution for 5 min, and then dried in a vacuum drying oven at 60 °C for 1 h. The soaking and drying cycle was repeated 5-20 times, and the fabric was weighed to calculate the loading amount. Step 3, the dried fabric is placed in a tube furnace for heating and then annealing; In step 3, the tube furnace is heated to 400°C-800°C at a rate of 5°C / min in a nitrogen atmosphere, maintained for 2h, and then annealed at a rate of 5°C / min to room temperature. The samples are recorded as T5C400 and T10C600, where the number after T represents the number of dip-coating and drying cycles, and the number after C represents the final calcination temperature; Step 4, spraying polydimethylsiloxane (PDMS) on the fabric treated in step 3 and then drying it to obtain; In step 4, after spraying, the coating is dried at 80°C for 6 hours.
[0015] The fabric prepared by the preparation method of the multifunctional anti-electromagnetic radiation carbonized fabric of the present invention is analyzed by scanning electron microscopy. A large number of Ti3CNTx sheets with a length of less than 5 μm are adsorbed on the fiber surface and are evenly distributed. The anti-electromagnetic wave performance of the composite fabric is tested. In the X-band of 8.2 GHz-12.4 GHz, the average shielding efficiency is 50 dB-60 dB. After 50 washings, the average shielding efficiency decreases by less than 3%. The electrothermal performance of the composite fabric is tested. When a voltage of 15 V is applied, the temperature rises rapidly to the saturation temperature of 100°C-200°C in 1min-2min, and the temperature of the sample remains stable at a constant pressure of 300s. The waterproof performance of the composite fabric is tested. The water contact angle of the initial pure cotton is 70°-80°, and the water contact angle of the composite carbonized cotton fabric is 120°-150°, showing a strong waterproof performance.
[0016] Example 1 Fabric: Plain cotton white woven fabric, C32×32, warp and weft density: 130×78.
[0017] The preparation method of the multifunctional anti-electromagnetic radiation carbonized fabric is specifically as follows: Step 1, desizing the pure cotton fabric by soaking it in a mixture of 10 g / L NaOH and 1 g / L JFC, with a bath ratio of 1:30, and keeping it at 100°C for 30 minutes; soaking the desizing cotton fabric in 5 mg / mL Ti3CNTx monodispersed liquid by dip coating, and then drying it in a vacuum oven at 60°C for 1 hour, repeating the soaking and drying process 5 times, weighing it, and calculating the loading amount; obtaining Ti3CNTx dip-coated cotton fabric; Step 2, the dried fabric was placed in a tubular furnace, heated to 400°C at a rate of 5°C / min in a nitrogen atmosphere (airflow of 100 sccm, purity of 99.999%), and maintained for 2 h, and then annealed at a rate of 5°C / min until it cooled to room temperature. The sample was recorded as T5C400, where the number after T represents the number of dip-coating and baking cycles, and the number after C represents the final calcination temperature; Step 3, dissolving 40 g of PDMS and 4 g of curing agent (weight ratio of 10:1) in 200 mL of n-hexane to obtain a polymer solution with a weight ratio of about 10%, immersing the cotton fabric in step 2 in the above solution for 7 min, and then curing the treated cotton fabric in an oven at 80 ° C for 6 h to obtain; like Figure 1 As shown, the prepared fabric was analyzed by scanning electron microscopy. A large number of Ti3CNTx sheets with a length of less than 5 μm were adsorbed on the fiber surface and were evenly distributed. The thin layer structure of Ti3CNTx can be seen. The anti-electromagnetic wave performance of the composite fabric was tested. In the X-band of 8.2GHz-12.4GHz, the average shielding efficiency was 50dB. After 50 washes, the average shielding efficiency was 48dB. The electrothermal performance of the composite fabric was tested. When the external 15V voltage was turned on, the temperature rose rapidly to the saturation temperature of 100℃ in 2min. The temperature of the sample remained stable at a constant pressure of 300 s. When the external voltage was turned off, the sample cooled from its saturated steady-state temperature to ambient temperature within 10s. The waterproof performance of the composite fabric was tested. The water contact angle of the initial pure cotton was 70°, and the water contact angle of the composite carbonized cotton fabric was 120°, showing strong waterproof performance.
[0018] Example 2 Fabric: Plain cotton white woven fabric, C32×32, warp and weft density: 130×78.
[0019] The preparation method of the multifunctional anti-electromagnetic radiation carbonized fabric is specifically as follows: Step 1: Desize the pure cotton fabric by soaking it in a mixture of 10 g / L NaOH and 1 g / L JFC, with a bath ratio of 1:30, and keep it at 100 °C for 30 min; soak the desized cotton fabric in 5 mg / mL Ti3CNTx monodispersed liquid by dip coating, and then dry it in a vacuum oven at 60 °C for 1 h, repeat the soaking and drying process 10 times, weigh it, and calculate the load; Step 2, the dried fabric was placed in a tubular furnace, heated to a final temperature of 600°C at a rate of 5°C / min in a nitrogen atmosphere, maintained at the final temperature for 2h, and then annealed at a rate of 5°C / min until it cooled to room temperature. The sample was recorded as T10C600, where the number after T represents the number of dip-coating and baking cycles, and the number after C represents the final calcination temperature; Step 3: Dissolve 40 g of PDMS and 4 g of curing agent (weight ratio of 10:1) in 200 mL of n-hexane to obtain a polymer solution with a weight ratio of about 10%. Immerse the cotton fabric prepared in step 2 in the above solution for 7 min, and then cure the treated cotton fabric in an oven at 80 °C for 6 h.
[0020] like Figure 2As shown in the figure, through scanning electron microscopy analysis, a large number of Ti3CNTx sheets with a length of less than 5μm are adsorbed on the fiber surface, and the thin layer structure is basically indistinguishable. The anti-electromagnetic wave performance of the composite fabric was tested. In the X-band of 8.2GHz-12.4GHz, the average shielding efficiency was 55dB. After 50 washes, the average shielding efficiency was 53dB. The electrothermal performance of the composite fabric was tested. When the external 15V voltage was turned on, the temperature rose rapidly to the saturation temperature of 150℃ in 1.5min. The temperature of the sample remained stable at a constant pressure of 300s. When the external voltage was turned off, the sample cooled from its saturated steady-state temperature to ambient temperature within 10s. The waterproof performance of the composite fabric was tested. The water contact angle of the initial pure cotton was 75°, and the water contact angle of the composite carbonized cotton fabric was 135°, showing strong waterproof performance.
[0021] Example 3 Fabric: Plain cotton white woven fabric, C32×32, warp and weft density: 130×78.
[0022] The preparation method of the multifunctional anti-electromagnetic radiation carbonized fabric is specifically as follows: Step 1: Desize the pure cotton fabric by soaking it in a mixture of 10 g / L NaOH and 1 g / L JFC, with a bath ratio of 1:30, and keep it at 100 °C for 30 min; soak the desized cotton fabric in 5 mg / mL Ti3CNTx monodispersed liquid by dip coating, and then dry it in a vacuum oven at 60 °C for 1 h, repeat the soaking and drying process 20 times, weigh it, and calculate the load; Step 2: Place the dried fabric in a tubular furnace, heat it to a final temperature of 800°C at a rate of 5°C / min in a nitrogen atmosphere, maintain the final temperature for 2 hours, and then anneal it at a rate of 5°C / min until it cools to room temperature. The sample is recorded as T20C800, where the number after T represents the number of dip-coating and baking cycles, and the number after C represents the final calcination temperature; Step 3: Dissolve 40 g of PDMS and 4 g of curing agent (weight ratio of 10:1) in 200 mL of n-hexane to obtain a polymer solution with a weight ratio of about 10%. Immerse the cotton fabric prepared in step 2 in the above solution for 7 min, and then cure the treated cotton fabric in an oven at 80 °C for 6 h.
[0023] like Figure 3As shown in the figure, through scanning electron microscopy analysis, a large number of Ti3CNTx sheets with a length of less than 5μm are adsorbed on the fiber surface, which are evenly distributed and the thin layer structure cannot be distinguished at all. The anti-electromagnetic wave performance of the composite fabric was tested. In the X-band of 8.2GHz-12.4GHz, the average shielding efficiency was 60dB. After 50 washes, the average shielding efficiency was 58dB. The electrothermal performance of the composite fabric was tested. When the external 15V voltage was turned on, the temperature rose rapidly to the saturation temperature of 200℃ in 1min. The temperature of the sample remained stable at a constant pressure of 300s. When the external voltage was turned off, the sample cooled from its saturated steady-state temperature to ambient temperature within 10s. The waterproof performance of the composite fabric was tested. The water contact angle of the initial pure cotton was 80°, and the water contact angle of the composite carbonized cotton fabric was 150°, showing strong waterproof performance.
[0024] The present invention utilizes a dip-coating method to combine positively charged cotton fabric and negatively charged Ti3CNTx with van der Waals force, and then undergoes high-temperature annealing. On the one hand, the cotton fabric is carbonized to produce conductivity and has an anti-electromagnetic radiation function. On the other hand, the conductivity, anti-electromagnetic radiation and electrothermal conversion performance of Ti3CNTx are greatly improved after high-temperature annealing, thereby improving the anti-electromagnetic radiation performance of the fabric. Finally, PDMS is used to spray the fabric to obtain a carbonized cotton fabric that is lightweight, soft, breathable, anti-electromagnetic radiation, electrothermal conversion and waterproof.
Claims
1. A method for preparing a multifunctional anti-electromagnetic radiation carbonized fabric, characterized in that: Follow the steps below to implement it: Step 1, soaking and desizing the pure cotton fabric; Step 2, immersing the desized fabric in the monodispersed liquid by an immersion method and drying; Step 3, the dried fabric is placed in a tube furnace for heating and then annealing; Step 4, spraying polydimethylsiloxane on the fabric treated in step 3 and then drying it.
2. The method for preparing the multifunctional anti-electromagnetic radiation carbonized fabric according to claim 1, characterized in that: In the step 1, the pure cotton fabric is immersed in a mixture of 10 g / L NaOH and 1 g / L fatty alcohol polyoxyethylene ether for desizing, with a bath ratio of 1:30, and maintained at 100° C. for 30 minutes.
3. The method for preparing the multifunctional anti-electromagnetic radiation carbonized fabric according to claim 1, characterized in that: In the step 2, the desized fabric is immersed in a 5 mg / mL Ti3CNTx monodispersion solution for 5 min, and then dried in a vacuum drying oven at 60°C for 1 h. The soaking and drying cycle is repeated 5-20 times, and the fabric is weighed to calculate the load.
4. The method for preparing the multifunctional anti-electromagnetic radiation carbonized fabric according to claim 1, characterized in that: In the step 3, the tubular furnace is heated to 400°C-800°C at a rate of 5°C / min in a nitrogen atmosphere, maintained for 2 hours, and then annealed at a rate of 5°C / min to room temperature.
5. The method for preparing the multifunctional anti-electromagnetic radiation carbonized fabric according to claim 1, characterized in that: In the step 4, after spraying, the coating is dried at 80° C. for 6 hours.
6. Fabric prepared by the method for preparing the multifunctional anti-electromagnetic radiation carbonized fabric according to any one of claims 1 to 5.