An antibacterial down jacket fabric with an aerogel coating and its preparation method

Abstract

This invention relates to an antibacterial down jacket fabric with an aerogel coating and its preparation method, belonging to the field of fabric production. The down jacket fabric includes a base fabric and an aerogel coating. The aerogel coating is composed of aqueous polyurethane, functional powder, a thickener, and deionized water. The functional powder is prepared from boron nitride aerogel particles, Houttuynia cordata ferment, sodium tripolyphosphate solution, and chitosan. The Houttuynia cordata ferment uses Houttuynia cordata powder, quinoa powder, and water as its fermentation substrate, and Bacillus subtilis is used as the fermentation bacterium. This invention obtains the functional powder by using boron nitride aerogel / chitosan coupled with Houttuynia cordata ferment. By incorporating this functional powder into the aqueous polyurethane-based fabric coating, the fabric acquires excellent and wash-resistant antibacterial properties and improves its moisture-proof effect.

Description

Technical Field

[0001] This invention belongs to the field of fabric production, specifically relating to an antibacterial down jacket fabric with an aerogel coating and its preparation method. Background Technology

[0002] Down jackets are prone to getting dirty during long-term wear, and the low frequency of washing makes it easy for bacteria to grow on the down fabric. In response to this, most down jacket fabrics have been improved in terms of waterproofing and easy cleaning. However, in order to deal with the bacteria remaining on the fabric, some down fabrics have also improved their antibacterial properties. The common method is to use antibacterial finishing agents to treat the basic down jacket fabric.

[0003] Aerogels possess excellent thermal insulation properties, leading to extensive research on their application in down jacket fabric production. However, their porous structure not only endows aerogels with thermal insulation properties but also makes them suitable as material carriers. In the field of pharmaceutical production, there have been studies using silica aerogels as carriers for pharmaceutical ingredients to prepare drugs. However, in the field of fabric production, there are no reports on using aerogels combined with antibacterial components to impart antibacterial effects to fabrics. Therefore, this application proposes an antibacterial down jacket fabric with an aerogel coating and its preparation method. Summary of the Invention

[0004] The purpose of this invention is to provide an antibacterial down jacket fabric with an aerogel coating and a method for preparing the same, in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] The present invention provides an antibacterial down jacket fabric with an aerogel coating, the down jacket fabric comprising a base fabric and an aerogel coating;

[0007] The raw materials for the aerogel coating include waterborne polyurethane, functional powder, thickener, and deionized water; the raw materials for preparing the functional powder include boron nitride aerogel particles, houttuynia cordata ferment, sodium tripolyphosphate solution, and chitosan.

[0008] As a further optimization of the present invention, the raw material composition of the aerogel coating, by weight, includes 25-30 parts of waterborne polyurethane, 5-10 parts of functional powder, 1-2 parts of thickener, and 40-50 parts of deionized water.

[0009] As a further optimization of the present invention, the fermentation substrate used in the Houttuynia cordata fermentation product includes Houttuynia cordata powder, quinoa powder and water, and the fermentation bacteria used is Bacillus subtilis.

[0010] As a further optimization of the present invention, the fermentation substrate comprises, by weight, 15-20 parts houttuynia cordata powder, 7-15 parts quinoa powder, and 25-30 parts water.

[0011] As a further optimization of the present invention, the inoculum size of Bacillus subtilis is 2-10 × 10⁻⁶. 6 cfu / mL.

[0012] As a further optimization of the present invention, the base fabric is obtained by blending polyester fibers and nylon fibers in a mass ratio of 1:(4-8).

[0013] This invention also provides a method for preparing an antibacterial down jacket fabric with an aerogel coating, specifically including the following steps:

[0014] Step 1: Prepare the base fabric;

[0015] Step 2: Mix houttuynia cordata powder, quinoa powder and water evenly to obtain a fermentation substrate. Inoculate the fermentation substrate with fermentation bacteria. After full fermentation, obtain houttuynia cordata fermented product by centrifugation and taking the supernatant.

[0016] Step 3: Mix boron nitride aerogel particles into ethanol and perform ultrasonic dispersion treatment. Then adjust the pH of the solution to 2-5 to obtain mixture A. Add sodium tripolyphosphate solution and houttuynia cordata fermentation product to mixture A in sequence. After uniform mixing, obtain mixture B. While stirring, pour mixture B into chitosan solution. Continue stirring until uniform. Then, let the liquid stand, centrifuge and dry in sequence. Grind the obtained material thoroughly to obtain functional powder.

[0017] Step 4: Mix waterborne polyurethane, functional powder, thickener and deionized water evenly to obtain a coating. Apply the coating to the surface of the base fabric and let it dry to obtain the finished fabric.

[0018] As a further optimization of the present invention, in step three, when mixing boron nitride aerogel particles and ethanol, the mass ratio of the two is 1:(35-45).

[0019] As a further optimization of the present invention, in step three, the volume ratio of mixture A, sodium tripolyphosphate solution, houttuynia cordata ferment and chitosan solution is (15-25):1:(5-10):(8-12).

[0020] As a further optimization of the present invention, in step two, the fermentation temperature is 25-30℃ and the fermentation time is 24-48h.

[0021] The beneficial effects of this invention are as follows:

[0022] This invention employs a water-based polyurethane fabric coating containing functional powders, which imparts excellent antibacterial properties to the fabric. Furthermore, the antibacterial effect of this coating exhibits good water resistance. The Houttuynia cordata fermentation product imparts excellent antibacterial effects to the functional powders. During the preparation of the functional powders, a boron nitride aerogel / chitosan composite is used as a carrier for the Houttuynia cordata fermentation product, allowing the functional powders to be stably and uniformly dispersed on the fabric surface, thereby effectively improving the fabric's moisture-proof and antibacterial properties. Detailed Implementation

[0023] The present application will now be described in further detail. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0024] I. Materials

[0025] Unless otherwise specified, all methods used in this invention are conventional methods known to those skilled in the art, and all reagents and materials used are commercially available products.

[0026] The boron nitride aerogel particles used in this invention were purchased from Beijing Zhongjinyan New Materials Technology Co., Ltd.

[0027] The houttuynia cordata powder used is obtained by drying and grinding the branches and leaves of houttuynia cordata.

[0028] The volume fraction of ethanol used was 60%.

[0029] The sodium tripolyphosphate solution used was purchased from Wuhan Dehechang Industry and Trade Co., Ltd.

[0030] The concentration of the chitosan solution used was 20 mg / ml;

[0031] The quinoa flour used is obtained by drying and grinding quinoa granules;

[0032] The waterborne polyurethane used is model PU3012;

[0033] The thickener used is xanthan gum.

[0034] II. Methods

[0035] Example 1

[0036] A method for preparing an antibacterial down jacket fabric with an aerogel coating specifically includes the following steps:

[0037] Step 1: Blend polyester fiber and nylon fiber at a mass ratio of 1:4 to obtain the base fabric.

[0038] Step 2: Mix 15 parts houttuynia cordata powder, 15 parts quinoa powder, and 25 parts water evenly to obtain the fermentation substrate, and then mix at a ratio of 10×10. 6 The inoculum was set at a standard of cfu / mL. Bacillus subtilis was introduced into the fermentation substrate and fermented at 25°C for 48 hours. Finally, the fermented product of Houttuynia cordata was obtained by centrifugation and collection of supernatant.

[0039] Step 3: Mix boron nitride aerogel particles into ethanol at a mass ratio of 1:35 and perform ultrasonic dispersion. Then adjust the pH of the solution to 2 to obtain mixture A. Add sodium tripolyphosphate solution and houttuynia cordata ferment to mixture A in sequence. After uniform mixing, obtain mixture B. While stirring, pour mixture B into chitosan solution. During the process, the volume ratio of mixture A, sodium tripolyphosphate solution, houttuynia cordata ferment and chitosan solution is 15:1:10:12. Continue stirring until uniform. Then, let the liquid stand, centrifuge and dry in sequence. Grind the obtained material thoroughly to obtain functional powder.

[0040] Step 4: Mix 25 parts waterborne polyurethane, 10 parts functional powder, 1 part thickener and 40 parts deionized water evenly to obtain a coating. Apply the coating to the surface of the base fabric and let it dry to obtain the finished fabric.

[0041] Example 2

[0042] A method for preparing an antibacterial down jacket fabric with an aerogel coating specifically includes the following steps:

[0043] Step 1: Blend polyester fiber and nylon fiber at a mass ratio of 1:8 to obtain the base fabric.

[0044] Step 2: Mix 20 parts houttuynia cordata powder, 7 parts quinoa powder, and 30 parts water evenly to obtain the fermentation substrate, then mix at a ratio of 2×10. 6 The inoculum was set at a standard concentration of CFU / mL. Bacillus subtilis was introduced into the fermentation substrate and fermented at 30°C for 24 hours. Finally, the fermented product of Houttuynia cordata was obtained by centrifugation and collection of the supernatant.

[0045] Step 3: Mix boron nitride aerogel particles into ethanol at a mass ratio of 1:45 and perform ultrasonic dispersion. Then adjust the pH of the solution to 5 to obtain mixture A. Add sodium tripolyphosphate solution and houttuynia cordata ferment to mixture A in sequence. After uniform mixing, obtain mixture B. While stirring, pour mixture B into chitosan solution. During the process, the volume ratio of mixture A, sodium tripolyphosphate solution, houttuynia cordata ferment and chitosan solution is 25:1:5:8. Continue stirring until uniform. Then, let the liquid stand, centrifuge and dry in sequence. Grind the obtained material thoroughly to obtain functional powder.

[0046] Step 4: Mix 30 parts waterborne polyurethane, 5 parts functional powder, 2 parts thickener and 50 parts deionized water evenly to obtain a coating. Apply the coating to the surface of the base fabric and let it dry to obtain the finished fabric.

[0047] Example 3

[0048] A method for preparing an antibacterial down jacket fabric with an aerogel coating specifically includes the following steps:

[0049] Step 1: Blend polyester fiber and nylon fiber at a mass ratio of 1:6 to obtain the base fabric.

[0050] Step 2: Mix 18 parts houttuynia cordata powder, 10 parts quinoa powder, and 27 parts water evenly to obtain the fermentation substrate, and then mix at a ratio of 6×10. 6 The inoculum was set at a standard of cfu / mL. Bacillus subtilis was introduced into the fermentation substrate and fermented at 28°C for 36 hours. Finally, the fermented product of Houttuynia cordata was obtained by centrifugation and collection of supernatant.

[0051] Step 3: Mix boron nitride aerogel particles into ethanol at a mass ratio of 1:40 and perform ultrasonic dispersion. Then adjust the pH of the solution to 3 to obtain mixture A. Add sodium tripolyphosphate solution and houttuynia cordata ferment to mixture A in sequence. After uniform mixing, obtain mixture B. While stirring, pour mixture B into chitosan solution. During the process, the volume ratio of mixture A, sodium tripolyphosphate solution, houttuynia cordata ferment and chitosan solution is 20:1:8:10. Continue stirring until uniform. Then, let the liquid stand, centrifuge and dry in sequence. Grind the obtained material thoroughly to obtain functional powder.

[0052] Step 4: Mix 27 parts waterborne polyurethane, 8 parts functional powder, 1.5 parts thickener and 45 parts deionized water evenly to obtain a coating. Apply the coating to the surface of the base fabric and let it dry to obtain the finished fabric.

[0053] Blank comparison

[0054] Fabric is obtained by blending polyester and nylon fibers in a mass ratio of 1:6.

[0055] Comparative Example 1

[0056] Based on Example 3, the boron nitride aerogel particles used in the preparation of the functional powder were replaced with silica aerogel particles.

[0057] Comparative Example 2

[0058] A method for preparing an antibacterial down jacket fabric with an aerogel coating specifically includes the following steps:

[0059] Step 1: Mix 18 parts houttuynia cordata powder, 10 parts quinoa powder, and 27 parts water evenly to obtain the fermentation substrate, and then mix at a ratio of 6×10. 6 The inoculum was set at a standard of cfu / mL. Bacillus subtilis was introduced into the fermentation substrate and fermented at 28°C for 36 hours. Finally, the fermented product of Houttuynia cordata was obtained by centrifugation and collection of supernatant.

[0060] Step 2: Blend polyester fiber and nylon fiber at a mass ratio of 1:6 to obtain the base fabric. Mix 27 parts of water-based polyurethane, 8 parts of houttuynia cordata ferment, 1.5 parts of thickener and 45 parts of deionized water evenly to obtain the coating. Apply the coating to the surface of the base fabric and let it dry to obtain the finished fabric.

[0061] Comparative Example 3

[0062] Based on Example 3, the Houttuynia cordata ferment used in preparing the functional powder was replaced with Houttuynia cordata extract obtained by ethanol extraction. The specific extraction process was as follows: Houttuynia cordata powder and 70% ethanol solution were added at a conventional solid-liquid ratio of 1:7. The amount of Houttuynia cordata powder used was the same as in step two of Example 3. They were placed in a Soxhlet extractor and heated under reflux for 5 hours, and then filtered under reduced pressure to obtain the Houttuynia cordata extract.

[0063] Comparative Example 4

[0064] Based on Example 3, the components of the fermentation substrate in step two were replaced with 24 parts of Houttuynia cordata powder, 10 parts of MS medium, and 27 parts of water.

[0065] Samples of equal size were obtained from the fabrics prepared in Examples 1-3, the blank comparative examples, and the comparative examples 1-4. Performance tests were performed on each sample sequentially. The specific test items and methods are as follows:

[0066] ① Antibacterial test: Each sample was machine washed 30 times according to the standard washing procedure set by AATCC. After washing, the antibacterial properties were tested again. The test method was based on GB / T 20944.2-2007 "Evaluation of antibacterial properties of textiles - Part 2: Absorption method". The test bacteria were Escherichia coli 8099 (Gram-negative bacteria) (including but not limited to this bacteria, such as Staphylococcus aureus, Candida, Escherichia coli, etc.). According to the standard, each fabric sample was cut into 20mm×20mm pieces and subjected to antibacterial testing after 50 washes.

[0067] ② Moisture resistance test: Immerse the sample in water for 5 minutes, remove it and perform a water-squeezing treatment under the same conditions for 10 minutes, then weigh the fabric again to obtain W1. Then, use a xenon arc lamp to irradiate the sample for 15 minutes, with the distance between the light source and the sample being 80 cm. Then, weigh the sample a second time to obtain W2. Calculate the drying rate of the fabric based on the weight difference before and after drying. The calculation formula is: W(%)=(W1-W2) / W2×100.

[0068]

[0069]

[0070] As can be seen from the table above:

[0071] (1) Compared with the blank control, the antibacterial rate and drying rate of the fabrics in Examples 1-3 are significantly better. Moreover, the decrease in antibacterial rate of Examples 1-3 before and after washing is smaller than that of the blank control. This result indicates that coating the fabric with a coating containing functional powder can significantly improve the antibacterial and moisture-proof properties of the fabric. It is inferred that the reason for this result is that the various natural components contained in the Houttuynia cordata ferment give the fabric coating an antibacterial effect. In the process of preparing the functional powder, the boron nitride aerogel / chitosan complex formed plays the role of carrying the Houttuynia cordata ferment, which enhances the dispersion uniformity of the Houttuynia cordata ferment and the adhesion to the coating substrate. This not only helps to achieve a better antibacterial effect, but also enhances the water resistance of the antibacterial effect. In addition, the boron nitride aerogel / chitosan complex itself has good thermal conductivity, which allows the fabric to heat up evenly under light conditions, which is conducive to the rapid dissipation of moisture in the fabric. The fabric surface can be kept dry and is not prone to bacterial growth, which further enhances the antibacterial effect of the fabric.

[0072] (2) Compared with Example 3, the carrier of Houttuynia cordata fermentation used in Comparative Example 1 was changed to silica aerogel / chitosan complex, while no carrier was used in Comparative Example 2. The Houttuynia cordata fermentation was directly added to the water-based polyurethane coating. The data showed that compared with Example 3, Comparative Examples 1 and 2 had a decrease in antibacterial properties and water resistance of antibacterial effect. Comparative Example 1 was better than Comparative Example 2 in terms of antibacterial properties, water resistance of antibacterial effect and moisture resistance. This result indicates that using a carrier to carry Houttuynia cordata fermentation is beneficial for Houttuynia cordata fermentation to exert its antibacterial effect in the fabric coating. Boron nitride aerogel / chitosan complex is a preferred carrier of Houttuynia cordata fermentation.

[0073] (3) Compared with Example 3, in Comparative Example 3, the Houttuynia cordata fermentation product was replaced with Houttuynia cordata extract obtained by ethanol extraction. In Comparative Example 4, the quinoa powder in the Houttuynia cordata fermentation system was replaced with an equal amount of MS medium. The results showed that the fabric in Comparative Example 4 was not as good as Example 3 in terms of antibacterial properties and washability of antibacterial effect, but was better than Comparative Example 3. This result indicates that when obtaining antibacterial-related components in Houttuynia cordata, fermentation can better extract antibacterial-related components from Houttuynia cordata than conventional extraction methods, which are preferred. Moreover, compared with conventional plant tissue fermentation systems, the fermentation system using quinoa powder as a nitrogen and carbon source is more compatible with Houttuynia cordata. The reason may be that quinoa powder can provide more suitable fermentation conditions for Houttuynia cordata during the co-fermentation process.

[0074] The embodiments described above are merely examples of several implementations of the present invention, and 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 those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. An antibacterial down jacket fabric with an aerogel coating, characterized in that, The down jacket fabric includes a base fabric and an aerogel coating; The aerogel coating is composed of waterborne polyurethane, functional powder, thickener, and deionized water; the functional powder is prepared from boron nitride aerogel particles, houttuynia cordata ferment, sodium tripolyphosphate solution, and chitosan. By weight, the fermentation substrate used in the Houttuynia cordata fermentation product includes 15-20 parts Houttuynia cordata powder, 7-15 parts quinoa powder and 25-30 parts water, and the fermentation bacteria used is Bacillus subtilis, with an inoculation amount of Bacillus subtilis of 2-10×106 cfu / mL.

2. The antibacterial down jacket fabric with an aerogel coating according to claim 1, characterized in that, By weight, the raw material composition of the aerogel coating includes 25-30 parts of waterborne polyurethane, 5-10 parts of functional powder, 1-2 parts of thickener, and 40-50 parts of deionized water.

3. The antibacterial down jacket fabric with an aerogel coating according to claim 1, characterized in that, The base fabric is obtained by blending polyester fibers and nylon fibers in a mass ratio of 1:(4-8).

4. A method for preparing an antibacterial down jacket fabric with an aerogel coating as described in any one of claims 1-3, characterized in that, Specifically, the following steps are included: Step 1: Prepare the base fabric; Step 2: Mix houttuynia cordata powder, quinoa powder and water evenly to obtain a fermentation substrate. Inoculate the fermentation substrate with fermentation bacteria. After full fermentation, obtain houttuynia cordata fermented product by centrifugation and taking the supernatant. Step 3: Mix boron nitride aerogel particles into ethanol and perform ultrasonic dispersion treatment. Then adjust the pH of the solution to 2-5 to obtain mixture A. Add sodium tripolyphosphate solution and houttuynia cordata fermentation product to mixture A in sequence. After uniform mixing, obtain mixture B. While stirring, pour mixture B into chitosan solution. Continue stirring until uniform. Then, let the liquid stand, centrifuge and dry in sequence. Grind the obtained material thoroughly to obtain functional powder. Step 4: Mix waterborne polyurethane, functional powder, thickener and deionized water evenly to obtain a coating. Apply the coating to the surface of the base fabric and let it dry to obtain the finished fabric.

5. The method for preparing the antibacterial down jacket fabric with an aerogel coating according to claim 4, characterized in that, In step three, when mixing boron nitride aerogel particles and ethanol, the mass ratio of the two is 1:(35-45).

6. The method for preparing the antibacterial down jacket fabric with an aerogel coating according to claim 4, characterized in that, In step three, the volume ratio of mixture A, sodium tripolyphosphate solution, houttuynia cordata ferment and chitosan solution is (15-25):1:(5-10):(8-12).

7. The method for preparing the antibacterial down jacket fabric with an aerogel coating according to claim 4, characterized in that, In step two, the fermentation temperature is 25-30℃ and the fermentation time is 24-48h.

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