Nano aerogel fabric compounded with silver film and preparation method of nano aerogel fabric

Abstract

The invention relates to a nano aerogel fabric compounded with a silver film and a preparation method of the nano aerogel fabric, and belongs to the technical field of textile fabric production, the fabric comprises base cloth and a functional silver film in parts by weight, the base cloth is obtained by blending cotton fibers, organic fibers and functional fibers, the functional silver film is formed on the base cloth after the base cloth is soaked in treating fluid B and dried, and the functional silver film is formed on the functional silver film after the functional silver film is dried. The functional fibers are carbon fibers with aerogel layers attached to the surfaces, the aerogel layers are formed by dipping the carbon fibers in treating fluid A and then conducting drying and calcination treatment, the treating fluid A is formed by mixing Zn / Fe co-doped TiO2 gel and methyl cellulose, and the treating fluid B is formed by mixing silver nitrate, an organic metal framework ZIF-8, a red moss extract and ethyl alcohol. According to the nano aerogel fabric compounded with the silver film and the preparation method of the nano aerogel fabric, part of functional fibers are blended in the base cloth, and then the functional silver film is compounded on the surface of the base cloth, so that the fabric has good antibacterial performance, anti-static performance and ultraviolet-proof performance at the same time.

Description

Technical Field

[0001] The invention belongs to the technical field of textile fabric production, and particularly relates to a nano-aerogel fabric with a composite silver film and a preparation method thereof. Background Art

[0002] As a nanoporous material, aerogel has a special high-porosity structure, which makes aerogel have good thermal insulation and flame retardant properties and hydrophobic and humidity-regulating properties, and also has the advantage of light weight. Based on the characteristics of aerogel, its application has expanded to many fields such as aerospace, building energy conservation, environmental governance and biomedicine. Among them, the application and development of aerogel in fabric production is closely related to people's lives.

[0003] However, traditional aerogel materials are mainly based on a single thermal insulation or adsorption function. The existing technology for the development of aerogel fabrics focuses on the introduction of aerogels. However, when developing the functions of aerogel fabrics, simply introducing aerogel materials cannot meet the demand for improving the fabric's multiple functions such as conductivity, antibacterial, and electromagnetic shielding. It can only focus on improving the thermal insulation and breathability of the fabric. Therefore, the application of aerogel materials in fabric production has yet to be developed, and the improvement effect achieved by combining aerogel materials with other functional materials in fabric production has yet to be explored. In this regard, the present invention provides a nano-aerogel fabric with a composite silver film and a preparation method thereof. Summary of the Invention

[0004] The purpose of the present invention is to provide a nano-aerogel fabric with a composite silver film and a preparation method thereof in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions: The present invention provides a nano-aerogel fabric with a composite silver film, comprising a base fabric and a functional silver film, wherein the base fabric is obtained by blending cotton fiber, organic fiber and functional fiber, and the functional silver film is formed on the base fabric by immersing the base fabric in a treatment solution B and drying the same. The functional fiber is a carbon fiber with an aerogel layer attached to its surface. The aerogel layer is formed by immersing the carbon fiber in a treatment solution A, followed by drying and calcining. The treatment solution A is a mixture of Zn / Fe co-doped TiO2 gel and methyl cellulose. Treatment solution B is a mixture of silver nitrate, organic metal framework ZIF-8, red moss extract and ethanol.

[0006] As a further optimization solution of the present invention, in the base fabric, the blending mass ratio of cotton fiber, organic fiber and functional fiber is 4-7:3-5:2.

[0007] As a further optimization solution of the present invention, the mass fraction of methyl cellulose in the treatment solution A is 3-5%. As a further optimized solution of the present invention, the raw materials for preparing the treatment solution B include, by weight, 3-5 parts of silver nitrate, 5-8 parts of organic metal framework ZIF-8, 9-12 parts of red moss extract and 20-30 parts of ethanol.

[0008] The present invention also provides a method for preparing a nano-aerogel fabric composite with a silver film, which specifically comprises the following steps: (1) uniformly mixing Zn / Fe co-doped TiO2 gel and methyl cellulose to obtain treatment solution A; (2) Ethanol was divided into two equal parts, silver nitrate was dissolved in one part of ethanol to obtain solution A, and the organic metal framework ZIF-8 was dispersed in the other part of ethanol to obtain solution B. Solution A was added dropwise to solution B, and then the red hair moss extract was added. After stirring, the treatment solution B was obtained and stored in the dark for later use; (3) vacuum impregnating the carbon fibers with treatment solution A, and then drying and calcining the vacuum impregnated carbon fibers in sequence to obtain functional fibers; (4) Blending cotton fiber, organic fiber and functional fiber to obtain base fabric; (5) Immerse the base fabric in treatment solution B and continue stirring for 1.5-2 hours. Then, the base fabric after the impregnation treatment is dried and irradiated with ultraviolet light in sequence to obtain the finished fabric.

[0009] As a further optimization scheme of the present invention, in step (2), the stirring and mixing process is carried out in a water bath at 40-50° C., and the stirring time is 1-2 h.

[0010] As a further optimization scheme of the present invention, in step (3), the vacuum impregnation treatment is carried out under the conditions of 0.05 MPa-0.09 MPa and 45-60° C. for 10-15 minutes.

[0011] As a further optimized solution of the present invention, in step (3), the drying process includes: pre-baking at 50-60°C for 15-25 minutes and drying at 80-100°C for 30-45 minutes.

[0012] As a further optimization solution of the present invention, in step (3), the calcination process is carried out in an argon protection environment, with a calcination temperature of 600-800°C and a duration of 20-40 minutes.

[0013] As a further optimization scheme of the present invention, in step (5), the drying temperature is 70-90°C, the drying time is 15-25 minutes, and the ultraviolet irradiation treatment uses ultraviolet light of 360-380nm, and the treatment time is 10-15 minutes.

[0014] The beneficial effects of the present invention are: The present invention provides a nano-aerogel fabric composited with a silver film and a preparation method thereof. By blending a portion of functional fibers into a base fabric and then compositely coating the base fabric with a functional silver film, the fabric simultaneously possesses excellent antibacterial, antistatic, and UV protection properties. The use of Zn / Fe co-doped TiO2 gel and calcination treatment in the functional fiber preparation process imparts excellent antistatic properties to the functional fiber. The blending of red moss extract and an organic metal framework (ZIF-8) with silver nitrate imparts excellent UV protection to the silver film on the base fabric surface. The combination of these ingredients and processing methods enhances the fabric's multifaceted performance. DETAILED DESCRIPTION

[0015] The present application is described in further detail below. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0016] 1. Materials (1) Carbon fiber was purchased from Anhui Yingtan New Material Technology Co., Ltd. (2) The preparation method of Zn / Fe co-doped TiO2 gel is as follows: taking the preparation of 100 mL of Zn / Fe co-doped TiO2 gel as an example, 15 mL of tetrabutyl titanate is added to 30 mL of anhydrous ethanol, and then 8 mL of glacial acetic acid is added to obtain premix A, 0.5 g of zinc nitrate and 0.8 g of ferric nitrate are added to 15 mL of anhydrous ethanol, and then 10 mL of deionized water is added to obtain premix B, while premix A is continuously stirred, premix B is slowly dripped into premix A, and stirring is continued for 1 h to obtain Zn / Fe co-doped TiO2 gel; (3) The preparation method of the red moss extract is as follows: methanol, ethanol, and water are mixed in a volume ratio of 5:3:2, and 0.2% ascorbic acid is added to the obtained mixture to obtain a solvent. Fresh red moss is washed, dried, and crushed to obtain red moss powder. The red moss powder is mixed with the solvent in a material-liquid ratio of 1:12-15 g / mL, and the mixture is ultrasonically treated at 650 W, 45 kHz, and 40°C for 35 min. The mixture is then centrifuged at 8000 rpm and 4°C for 15 min, and the supernatant is collected as the red moss extract. (4) Organic metal framework ZIF-8 was purchased from Shanghai Juna Technology Co., Ltd.

[0017] Unless otherwise specified, the methods used in the present invention are conventional methods known to those skilled in the art, and the reagents and other materials used are commercially available products unless otherwise specified.

[0018] (5) In the base fabric, the blending mass ratio of cotton fiber, organic fiber and functional fiber is 4-7:3-5:2.

[0019] Fabric preparation and performance testing Example 1 A method for preparing a nano-aerogel fabric composite with a silver film specifically comprises the following steps: (1) The Zn / Fe co-doped TiO2 gel and methyl cellulose were uniformly mixed to obtain treatment solution A, wherein the mass fraction of methyl cellulose was 3%; (2) Take 3 parts of silver nitrate, 8 parts of organic metal framework ZIF-8, 9 parts of red moss extract and 30 parts of ethanol by weight, divide the ethanol into two equal parts, dissolve the silver nitrate in one part of ethanol to obtain solution A, disperse the organic metal framework ZIF-8 in the other part of ethanol to obtain solution B, add solution A dropwise to solution B, then add red moss extract, stir and mix in a water bath at 35°C for 2 hours, obtain treatment solution B, and store in the dark for later use; (3) Under the conditions of 0.05 MPa and 40°C, the carbon fibers were vacuum impregnated with treatment solution A at a bath ratio of 1:5 for 15 min, and the vacuum impregnated carbon fibers were dried and calcined in sequence to obtain functional fibers; The drying process includes: pre-baking at 50°C for 25 minutes and drying at 80°C for 45 minutes; The calcination process was carried out in an argon atmosphere at a temperature of 600°C for 40 minutes. (4) blending cotton fiber, organic fiber and functional fiber in a mass ratio of 4:3:2 to obtain a base fabric; (5) The base fabric was immersed in the treatment liquid B and stirred continuously for 1.5 h. The base fabric was dried at 70 ° C for 25 min and then irradiated with 360° ultraviolet light for 15 min to obtain the finished fabric.

[0020] Example 2 A method for preparing a nano-aerogel fabric composite with a silver film specifically comprises the following steps: (1) The Zn / Fe co-doped TiO2 gel and methyl cellulose were uniformly mixed to obtain treatment solution A, wherein the mass fraction of methyl cellulose was 5%; (2) Take 5 parts of silver nitrate, 5 parts of organic metal framework ZIF-8, 12 parts of red moss extract and 20 parts of ethanol by weight, divide the ethanol into two equal parts, dissolve the silver nitrate in one part of ethanol to obtain solution A, disperse the organic metal framework ZIF-8 in the other part of ethanol to obtain solution B, add solution A dropwise to solution B, then add red moss extract, stir and mix in a water bath at 45°C for 1 hour, obtain treatment solution B, and store in the dark for later use; (3) Under the conditions of 0.09 MPa and 50°C, the carbon fibers were vacuum impregnated with treatment solution A at a bath ratio of 1:5 for 10 min, and the vacuum impregnated carbon fibers were dried and calcined in sequence to obtain functional fibers; The drying process includes: pre-baking at 60°C for 15 min and drying at 100°C for 30 min; The calcination process was carried out in an argon atmosphere at a temperature of 800°C for 20 minutes. (4) blending cotton fiber, organic fiber and functional fiber in a mass ratio of 4:3:2 to obtain a base fabric; (5) The base fabric was immersed in the treatment liquid B and stirred for 2 h. The base fabric was dried at 90 °C for 15 min and then irradiated with 360 nm ultraviolet light for 10 min to obtain the finished fabric.

[0021] Example 3 A method for preparing a nano-aerogel fabric composite with a silver film specifically comprises the following steps: (1) The Zn / Fe co-doped TiO2 gel and methyl cellulose were uniformly mixed to obtain treatment solution A, wherein the mass fraction of methyl cellulose was 4%; (2) Take 4 parts of silver nitrate, 7 parts of organic metal framework ZIF-8, 10 parts of red moss extract and 26 parts of ethanol by weight, divide the ethanol into two equal parts, dissolve the silver nitrate in one part of ethanol to obtain solution A, disperse the organic metal framework ZIF-8 in the other part of ethanol to obtain solution B, add solution A dropwise to solution B, and then add red moss extract, stir and mix in a water bath at 40°C for 1.5 hours to obtain treatment solution B, and store in the dark for later use; (3) Under the conditions of 0.07 MPa and 45°C, the carbon fibers were vacuum impregnated with treatment solution A at a bath ratio of 1:5 for 12 min, and the vacuum impregnated carbon fibers were dried and calcined in sequence to obtain functional fibers; The drying process includes: pre-drying at 55°C for 20 minutes and drying at 90°C for 35 minutes; The calcination process was carried out in an argon atmosphere at a temperature of 700°C for 30 minutes. (4) blending cotton fiber, organic fiber and functional fiber in a mass ratio of 4:3:2 to obtain a base fabric; (5) The base fabric was immersed in the treatment liquid B and stirred continuously for 1.5 h. The base fabric was dried at 80 °C for 20 min and then irradiated with 370 nm ultraviolet light for 13 min to obtain the finished fabric.

[0022] Blank example Cotton fiber, organic fiber and functional fiber are blended in a mass ratio of 4:3:2 to obtain the finished fabric.

[0023] Samples of equal size were obtained from the fabrics obtained in Examples 1-3 and the blank example, and performance tests were performed on each group of samples. The test items and methods included: Persistent antimicrobial testing: Based on the standard GB / T 20944.2-2007, "Evaluation of antibacterial properties of textiles - Part 2: Absorption method," Staphylococcus aureus was selected as the test strain. Samples were washed 50 times according to the standard machine washing procedure established by AATCC. Each sample was tested sequentially using the oscillation method before and after washing to obtain antimicrobial rate data. The post-wash antimicrobial retention rate was calculated based on the pre- and post-wash antimicrobial rate data, and used as a representative value for the sample's persistent antimicrobial performance. The calculation formula is: Antimicrobial retention rate = (antimicrobial rate after washing / antimicrobial rate before washing) × 100%; Antistatic performance test: Under humidity conditions of 20% and 50%, referring to the standard GB∕T 12703.1-2021 "Textiles - Test methods for electrostatic properties Part 1: Corona charging method", each fabric sample was tested for antistatic performance, with the static voltage half-life as the test indicator (Level 1: half-life ≤ 6s; Level 2: 6 < half-life ≤ 15; Level 3: 15 < half-life ≤ 30; Level 4: 30 < half-life ≤ 60, Level 5: > 60s). The test results are shown in the following table: UV Protection: The UV protection of the fabrics prepared in Examples 1-3 and Comparative Examples 1-2 was tested using a UV-2000F Textile UV Protection Factor Tester. According to GB / T 18830-2009, "Evaluation of the UV Protection of Textiles," five points were taken at different locations on each sample to measure the transmittance (TUVA) of ultraviolet light with a wavelength of 200-400 nm and the ultraviolet protection factor (UPF), which serve as evaluation criteria for UV protection.

[0024] The test results are shown in the following table: ; As can be seen from the above table, compared with the conventional fabric in the blank example, the nano aerogel fabric with a composite silver film obtained by the preparation method provided by the present invention has significantly better antibacterial effect, water resistance, antistatic performance and UV protection performance. This result shows that the use of functional fibers and functional silver films has improved the antibacterial performance, antistatic performance and UV protection performance of the fabric.

[0025] In order to further explore the effect of the preparation of functional fibers on the performance of fabrics, the following comparative examples were set based on Example 3: ① Comparative Example 1: Only the Zn / Fe co-doped TiO2 gel in step (1) was replaced with conventional TiO2 gel; ②Comparative Example 2: Only the calcination process in step (3) was omitted; Samples were obtained from the fabrics obtained in Comparative Example 1 and Comparative Example 2, and performance tests were performed on the samples. The sample size, performance test items, and methods were the same as those in Example 3. The test results are shown in the following table: ; It can be seen from the above table that: compared with Example 3, the half-life level of Comparative Examples 1 and 2 is significantly reduced, and the retention rate of the antibacterial effect also decreases to a certain extent. This result shows that the use of Zn / Fe co-doped TiO2 gel, combined with the treatment method of calcination in an argon protection environment, can improve the antistatic performance of the fabric and the water resistance of the antibacterial effect of the fabric. It is inferred that the reason is that the Zn / Fe co-doped TiO2 gel combined with the calcination treatment method can make the functional fiber have good surface properties, make the functional fiber more conductive, and make the combination of the silver film and the base fabric more stable.

[0026] In order to further explore the effect of the preparation of the functional silver film on the performance of the fabric, the following comparative examples were set based on Example 3: ① Comparative Example 3: Only the red moss extract in the treatment solution B in step (2) was replaced with an equal amount of tea extract, wherein the preparation method of the tea extract is as follows: 95% ethanol, 99.5% propylene glycol and water were mixed in a ratio of 60:8:15 to obtain an extraction solvent, the tea leaves were crushed and sieved (80 mesh sieve), the tea powder was added to the extraction solvent at a material-liquid ratio of 1:8, and the mixture was ultrasonically treated at 650W, 45kHz, and 40°C for 35min, and then centrifuged at 8000rpm and 4°C for 15min, and the supernatant was collected as the tea extract; ② Comparative Example 4: Only the preparation method of solution B in step (2) was adjusted. The modified preparation method was as follows: chitosan was dissolved in hydrochloric acid having a mass concentration of 2% to obtain solution B, wherein the amounts of chitosan and hydrochloric acid having a mass concentration of 2% were the same as the amounts of the organic metal framework ZIF-8 and ethanol used in the preparation of solution B in step (2) of Example 3; ③Comparative Example 5, only the ultraviolet irradiation process in step (5) is omitted.

[0027] Samples were obtained from the fabrics obtained in Comparative Examples 3-5, and performance tests were performed on the samples. The sample size, performance test items, and methods were the same as those in Example 3. The test results are shown in the following table: ; As can be seen from the table above, compared to Example 3, the UV protection of the fabrics in Comparative Examples 3 and 4 was significantly reduced. This result indicates that the combined use of red moss extract and the metal organic framework ZIF-8 can enhance the UV protection of the functional silver film. This is presumably due to the phenolic acids in the red moss extract being mixed with silver and then loaded onto the metal organic framework ZIF-8, resulting in a more uniform texture and improved shielding effect for the functional silver film. Compared to Example 3, the washability of the fabric's antibacterial effect in Comparative Example 5 was significantly reduced, indicating that UV curing treatment improves the washability of the functional silver film, thereby reducing the weakening of the fabric's antibacterial effect due to washing.

[0028] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A nano-aerogel fabric with a composite silver film, characterized in that: The method comprises a base fabric and a functional silver film, wherein the base fabric is obtained by blending cotton fiber, organic fiber and functional fiber, and the functional silver film is formed on the base fabric by immersing the base fabric in treatment liquid B and drying the base fabric; The functional fiber is a carbon fiber with an aerogel layer attached to the surface, wherein the aerogel layer is formed by immersing the carbon fiber in a treatment liquid A and then drying and calcining the carbon fiber. The treatment liquid A is a mixture of Zn / Fe co-doped TiO2 gel and methyl cellulose; The treatment solution B is prepared by mixing silver nitrate, organic metal framework ZIF-8, red moss extract and ethanol.

2. The nano-aerogel fabric with composite silver film according to claim 1, characterized in that: In the base fabric, the blending mass ratio of cotton fiber, organic fiber and functional fiber is 4-7:3-5:

2.

3. The nano-aerogel fabric with composite silver film according to claim 1, characterized in that: In the treatment solution A, the mass fraction of methyl cellulose is 3-5%.

4. The nano-aerogel fabric with composite silver film according to claim 1, characterized in that: In parts by weight, the raw materials for preparing the treatment solution B include 3-5 parts of silver nitrate, 5-8 parts of organic metal framework ZIF-8, 9-12 parts of red moss extract and 20-30 parts of ethanol.

5. The method for preparing a nano-aerogel fabric with a composite silver film according to claim 1, wherein: The specific steps include: (1) uniformly mixing Zn / Fe co-doped TiO2 gel and methyl cellulose to obtain treatment solution A; (2) Ethanol was divided into two equal parts, silver nitrate was dissolved in one part of ethanol to obtain solution A, and the organic metal framework ZIF-8 was dispersed in the other part of ethanol to obtain solution B. Solution A was added dropwise to solution B, and then the red hair moss extract was added. After stirring, the treatment solution B was obtained and stored in the dark for later use; (3) vacuum impregnating the carbon fibers with treatment solution A, and then drying and calcining the vacuum impregnated carbon fibers in sequence to obtain functional fibers; (4) Blending cotton fiber, organic fiber and functional fiber to obtain base fabric; (5) Immerse the base fabric in treatment solution B and continue stirring for 1.5-2 hours. Then, the base fabric after the impregnation treatment is dried and irradiated with ultraviolet light in sequence to obtain the finished fabric.

6. The preparation method according to claim 5, characterized in that In the step (2), the stirring and mixing process is carried out in a water bath at 40-50° C., and the stirring time is 1-2 h.

7. The preparation method according to claim 5, characterized in that In the step (3), the vacuum impregnation treatment is carried out under the conditions of 0.05 MPa-0.09 MPa and 45-60° C. for 10-15 minutes.

8. The preparation method according to claim 5, characterized in that In step (3), the drying process includes: pre-baking at 50-60°C for 15-25 minutes and drying at 80-100°C for 30-45 minutes.

9. The preparation method according to claim 5, characterized in that In the step (3), the calcination process is carried out in an argon protection environment, with a calcination temperature of 600-800°C and a duration of 20-40 minutes.

10. The preparation method according to claim 5, characterized in that In the step (5), the drying temperature is 70-90°C, the drying time is 15-25 minutes, and the ultraviolet irradiation treatment uses ultraviolet light of 360-380nm, and the treatment time is 10-15 minutes.