Antibacterial down jacket fabric with aerogel coating and preparation method thereof

Abstract

The invention relates to an antibacterial down jacket fabric with an aerogel coating and a preparation method of the antibacterial down jacket fabric, and belongs to the field of fabric production.The down jacket fabric comprises base cloth and the aerogel coating, and the aerogel coating is prepared from waterborne polyurethane, functional powder, a thickening agent and deionized water. The functional powder is prepared from boron nitride aerogel particles, a herba houttuyniae fermentation product, a sodium tripolyphosphate solution and chitosan, a fermentation substrate adopted by the herba houttuyniae fermentation product comprises herba houttuyniae powder, quinoa flour and water, and adopted zymophyte is bacillus subtilis. Functional powder is obtained in the mode that boron nitride aerogel / chitosan carries herba houttuyniae leavening, the functional powder is doped into a waterborne polyurethane-based fabric coating, the fabric is endowed with the excellent and washable antibacterial effect, and the moisture-proof effect of the fabric is improved.

Description

Technical Field

[0001] The invention belongs to the field of fabric production, and particularly relates to an antibacterial down jacket fabric with an aerogel coating and a preparation method thereof. Background Art

[0002] Down jackets are easily stained during long-term wear, and the infrequent cleaning makes it easy for bacteria to grow on down fabrics. In view of this usage characteristic, most down jacket fabrics have made improvements in terms of waterproofness and easy cleaning. However, in response to the bacteria remaining on the fabrics, a small number of down fabrics have also made improvements to their own antibacterial properties. The commonly used method is to use antibacterial finishing agents to finish the basic down jacket fabrics.

[0003] Aerogel has excellent thermal insulation properties, so there are abundant studies on its application in the production of down jacket fabrics. However, the porous structure not only gives aerogel thermal insulation properties, but also makes aerogel suitable for use as a material carrier. In the field of drug production, there have been studies on the use of silica aerogel as a carrier of medicinal ingredients to prepare drugs, but in the field of fabric production, there have been no reports on the use of aerogel combined with antibacterial ingredients to give fabrics antibacterial effects. In this regard, the present application proposes an antibacterial down jacket fabric with an aerogel coating and a preparation method thereof. Summary of the invention

[0004] The purpose of the present invention is to provide an antibacterial down jacket fabric with an aerogel coating 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:

[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 of the aerogel coating include water-based polyurethane, functional powder, thickener and deionized water; the raw materials for preparing the functional powder include boron nitride aerogel particles, Houttuynia cordata fermentation product, sodium tripolyphosphate solution and chitosan.

[0008] As a further optimization scheme of the present invention, 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 by weight.

[0009] As a further optimization scheme of the present invention, the fermentation matrix 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 scheme of the present invention, the fermentation matrix includes 15-20 parts of houttuynia cordata powder, 7-15 parts of quinoa powder and 25-30 parts of water by weight.

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

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

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

[0014] Step 1: preparing base fabric;

[0015] Step 2: Evenly mix houttuynia powder, quinoa powder and water to obtain a fermentation matrix, inoculate fermentation bacteria into the fermentation matrix, and after sufficient fermentation, obtain a houttuynia fermentation product by centrifugation and taking the supernatant;

[0016] Step 3: mixing the boron nitride aerogel particles into ethanol and performing ultrasonic dispersion treatment, then adjusting the pH value of the solution to 2-5 to obtain a mixed solution A, and then sequentially adding the sodium tripolyphosphate solution and the Houttuynia cordata fermentation product to the mixed solution A, and uniformly mixing to obtain a mixed solution B, and pouring the mixed solution B into the chitosan solution while stirring, and continuing to stir until uniform, and then sequentially standing, centrifuging and drying the liquid, and fully grinding the obtained product to obtain a functional powder;

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

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

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

[0020] As a further optimization scheme of the present invention, in step 2, the fermentation temperature is 25-30°C and the fermentation time is 24-48h.

[0021] The beneficial effects of the present invention are:

[0022] The present invention adopts an aqueous polyurethane-based fabric coating containing functional powder, which gives the fabric excellent antibacterial properties, and the antibacterial effect of the coating is also well resistant to water washing, wherein the houttuynia cordata fermentation product enables the functional powder to have a good antibacterial effect, and in the process of preparing the functional powder, a boron nitride aerogel / chitosan composite is used as a carrier of the houttuynia cordata fermentation product, so that the functional powder can be stably and evenly dispersed on the fabric surface, thereby effectively improving the moisture-proof and antibacterial properties of the fabric. DETAILED DESCRIPTION

[0023] 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.

[0024] 1. Materials

[0025] 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.

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

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

[0028] The volume fraction of ethanol used is 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 powder used is obtained by drying and grinding quinoa particles;

[0032] The water-based polyurethane model used is PU3012;

[0033] The thickener used is xanthan gum.

[0034] 2. Methods

[0035] Example 1

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

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

[0038] Step 2: Evenly mix 15 parts of houttuynia powder, 15 parts of quinoa powder and 25 parts of water to obtain a fermentation matrix. 6 cfu / mL inoculation standard, Bacillus subtilis was inoculated into the fermentation matrix, and then fermented at 25°C for 48 hours, and finally the Houttuynia cordata fermentation product was obtained by centrifugation and taking the supernatant.

[0039] Step 3: According to a mass ratio of 1:35, the boron nitride aerogel particles are mixed into ethanol and ultrasonically dispersed, and then the pH value of the solution is adjusted to 2 to obtain a mixed solution A, and then sodium tripolyphosphate solution and Houttuynia cordata fermentation product are added to the mixed solution A in sequence, and mixed evenly to obtain a mixed solution B, and the mixed solution B is poured into the chitosan solution while stirring. During the process, the volume ratio of the mixed solution A, sodium tripolyphosphate solution, Houttuynia cordata fermentation product and chitosan solution is 15:1:10:12, and the liquid is allowed to stand, centrifuged and dried in sequence after stirring until uniform, and the obtained product is fully ground to obtain a functional powder;

[0040] Step 4: Evenly mix 25 parts of waterborne polyurethane, 10 parts of functional powder, 1 part of thickener and 40 parts of deionized water to obtain a coating, apply the coating on 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 comprises the following steps:

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

[0044] Step 2: Evenly mix 20 parts of Houttuynia cordata powder, 7 parts of quinoa powder and 30 parts of water to obtain a fermentation matrix. 6 cfu / mL inoculation standard, Bacillus subtilis was inoculated into the fermentation matrix, and then fermented at 30°C for 24 hours, and finally the Houttuynia cordata fermentation product was obtained by centrifugation and taking the supernatant.

[0045] Step 3: According to a mass ratio of 1:45, the boron nitride aerogel particles are mixed into ethanol and ultrasonically dispersed, and then the pH value of the solution is adjusted to 5 to obtain a mixed solution A, and then sodium tripolyphosphate solution and Houttuynia cordata fermentation product are added to the mixed solution A in sequence, and mixed evenly to obtain a mixed solution B, and the mixed solution B is poured into the chitosan solution while stirring. During the process, the volume ratio of the mixed solution A, sodium tripolyphosphate solution, Houttuynia cordata fermentation product and chitosan solution is 25:1:5:8. After continuing to stir until uniform, the liquid is allowed to stand, centrifuged and dried in sequence, and the obtained product is fully ground to obtain a functional powder;

[0046] Step 4: Evenly mix 30 parts of waterborne polyurethane, 5 parts of functional powder, 2 parts of thickener and 50 parts of deionized water to obtain a coating, apply the coating on 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 comprises the following steps:

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

[0050] Step 2: Evenly mix 18 parts of houttuynia powder, 10 parts of quinoa powder and 27 parts of water to obtain a fermentation matrix. 6 cfu / mL inoculation standard, Bacillus subtilis was inoculated into the fermentation matrix, and then fermented at 28°C for 36 hours, and finally the Houttuynia cordata fermentation product was obtained by centrifugation and taking the supernatant.

[0051] Step 3: According to a mass ratio of 1:40, the boron nitride aerogel particles are mixed into ethanol and ultrasonically dispersed, and then the pH value of the solution is adjusted to 3 to obtain a mixed solution A, and then sodium tripolyphosphate solution and Houttuynia cordata fermentation product are added to the mixed solution A in sequence, and mixed evenly to obtain a mixed solution B, and the mixed solution B is poured into the chitosan solution while stirring. During the process, the volume ratio of the mixed solution A, the sodium tripolyphosphate solution, the Houttuynia cordata fermentation product and the chitosan solution is 20:1:8:10. After continuing to stir until uniform, the liquid is allowed to stand, centrifuged and dried in sequence, and the obtained product is fully ground to obtain a functional powder;

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

[0053] Blank comparison

[0054] The polyester fiber and the nylon fiber are blended in a mass ratio of 1:6 to obtain the fabric.

[0055] Comparative Example 1

[0056] Based on Example 3, the boron nitride aerogel particles used in preparing the functional powder were replaced with silicon dioxide aerogel particles.

[0057] Comparative Example 2

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

[0059] Step 1: Evenly mix 18 parts of houttuynia powder, 10 parts of quinoa powder and 27 parts of water to obtain a fermentation matrix. 6 cfu / mL inoculation standard, Bacillus subtilis was inoculated into the fermentation matrix, and then fermented at 28°C for 36 hours, and finally the Houttuynia cordata fermentation product was obtained by centrifugation and taking the supernatant.

[0060] Step 2: Blend polyester fiber and nylon fiber in a mass ratio of 1:6 to obtain a base fabric, evenly mix 27 parts of water-based polyurethane, 8 parts of Houttuynia cordata fermentation product, 1.5 parts of thickener and 45 parts of deionized water to obtain a coating, apply the coating on the surface of the base fabric, and leave it to dry to obtain a finished fabric.

[0061] Comparative Example 3

[0062] Based on Example 3, the Houttuynia cordata fermentation product used in preparing the functional powder was replaced with the Houttuynia cordata extract obtained by ethanol extraction. The specific extraction process was as follows: Houttuynia cordata powder and a 70% ethanol solution by mass were added at a conventional solid-liquid ratio of 1:7, wherein the amount of Houttuynia cordata powder was the same as that in step 2 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 2 were replaced with 24 parts of Houttuynia cordata powder, 10 parts of MS culture medium and 27 parts of water.

[0065] Samples of equal size were obtained from the fabrics prepared in Examples 1-3, the blank comparative example, and the comparative examples 1-4, and the performance of each sample was tested in turn. The specific test items and methods are as follows:

[0066] ① Antibacterial test: According to the standard machine washing procedure set by AATCC, each sample was washed 30 times, and then the antibacterial test was carried out again after washing. The test method is as follows: According to GB / T 20944.2-2007 "Evaluation of Antibacterial Properties of Textiles Part 2: Absorption Method", the test bacteria: Escherichia coli 8099 (Gram-negative bacteria) (including but not limited to this bacteria, it can also be Staphylococcus aureus, Candida albicans, Escherichia coli, etc.), according to the standard, each fabric sample was cut into 20mm×20mm size, and the antibacterial test was carried out after 50 washes.

[0067] ② Moisture resistance test: immerse the sample in water for 5 minutes, take it out and squeeze it under the same conditions for 10 minutes, weigh the fabric again to get W1, then use a xenon arc lamp to illuminate the sample for 15 minutes, the distance between the light source and the sample is 80 cm, then weigh the sample again to get W2, calculate the drying rate of the fabric according to the weight difference before and after drying, the calculation formula is: W (%) = (W1-W2) / W2×100.

[0068]

[0069]

[0070] From the table above we can see that:

[0071] (1) Compared with the blank control example, the antibacterial rate and drying rate of the fabrics in Examples 1-3 are significantly better, and the decrease in the antibacterial rate of Examples 1-3 before and after washing is less than that of the blank example. This result shows that the use of a coating containing functional powder to coat the fabric 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 ingredients contained in the Houttuynia cordata fermentation product make the fabric coating have an antibacterial effect. In the process of preparing the functional powder, the boron nitride aerogel / chitosan composite formed has the effect of carrying the Houttuynia cordata fermentation product, enhancing the dispersion uniformity of the Houttuynia cordata fermentation product and the adhesion to the coating substrate, which is not only conducive to achieving a better antibacterial effect, but also can enhance the water washing resistance of the antibacterial effect. In addition, the boron nitride aerogel / chitosan composite itself has good thermal conductivity, so that the fabric can be evenly heated under light conditions, which is conducive to the rapid dissipation of moisture in the fabric. The surface of the fabric can be kept dry and not easy to cause bacteria to grow, further enhancing the antibacterial effect of the fabric;

[0072] (2) Compared with Example 3, the Houttuynia cordata fermentation product carrier used in Comparative Example 1 was changed to a silica aerogel / chitosan composite, while no carrier was used in Comparative Example 2, and the Houttuynia cordata fermentation product was directly added to the water-based polyurethane-based coating. The data showed that compared with Example 3, the antibacterial properties and water washability of the antibacterial effect of Comparative Examples 1 and 2 were reduced, and Comparative Example 1 was superior to Comparative Example 2 in antibacterial properties, water washability of the antibacterial effect, and moisture resistance. This result shows that the use of a carrier to carry Houttuynia cordata fermentation product is conducive to the antibacterial effect of Houttuynia cordata fermentation product in the fabric coating, and boron nitride aerogel / chitosan composite is a preferred carrier of Houttuynia cordata fermentation product.

[0073] (3) Compared with Example 3, in Comparative Example 3, the Houttuynia cordata fermentation product was replaced with a Houttuynia cordata extract obtained by ethanol extraction, and in Comparative Example 4, the quinoa powder in the Houttuynia cordata fermentation system was replaced with an equal amount of MS culture medium. The results showed that the fabric in Comparative Example 4 was inferior to that in Example 3 in terms of antibacterial property and water washability of the antibacterial effect, but was better than that in Comparative Example 3. This result shows that when obtaining the antibacterial-related components in Houttuynia cordata, the fermentation method can better extract the components related to the antibacterial effect from Houttuynia cordata than the conventional extraction method represented by ethanol extraction, and compared with the conventional plant tissue fermentation system, the fermentation system using quinoa powder as the nitrogen source and carbon source is more compatible with Houttuynia cordata, and the reason may be that quinoa powder can provide more suitable fermentation conditions for Houttuynia cordata during the synergistic fermentation process with Houttuynia cordata.

[0074] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An antibacterial down jacket fabric with aerogel coating, characterized in that: The down jacket fabric comprises a base fabric and an aerogel coating; The raw materials of 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 fermentation product, sodium tripolyphosphate solution and chitosan.

2. The antibacterial down jacket fabric with aerogel coating according to claim 1, characterized in that: 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 by weight.

3. The antibacterial down jacket fabric with aerogel coating according to claim 1, characterized in that: 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.

4. The antibacterial down jacket fabric with aerogel coating according to claim 3, characterized in that: In parts by weight, the fermentation matrix includes 15-20 parts of houttuynia cordata powder, 7-15 parts of quinoa powder and 25-30 parts of water.

5. The antibacterial down jacket fabric with aerogel coating according to claim 3, characterized in that: The inoculation amount of Bacillus subtilis is 2-10×10 6 cfu / mL.

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

7. A method for preparing the antibacterial down jacket fabric with aerogel coating according to any one of claims 1 to 6, characterized in that: The specific steps include: Step 1: preparing base fabric; Step 2: Evenly mix houttuynia powder, quinoa powder and water to obtain a fermentation matrix, inoculate fermentation bacteria into the fermentation matrix, and after sufficient fermentation, obtain a houttuynia fermentation product by centrifugation and taking the supernatant; Step 3: mixing the boron nitride aerogel particles into ethanol and performing ultrasonic dispersion treatment, then adjusting the pH value of the solution to 2-5 to obtain a mixed solution A, and then sequentially adding the sodium tripolyphosphate solution and the Houttuynia cordata fermentation product to the mixed solution A, and uniformly mixing to obtain a mixed solution B, and pouring the mixed solution B into the chitosan solution while stirring, and continuing to stir until uniform, and then sequentially standing, centrifuging and drying the liquid, and fully grinding the obtained product to obtain a functional powder; Step 4: Evenly mix the waterborne polyurethane, functional powder, thickener and deionized water to obtain a coating, apply the coating on the surface of the base fabric, and let it dry to obtain a finished fabric.

8. The method for preparing the antibacterial down jacket fabric with aerogel coating according to claim 7, characterized in that: In the step 3, when the boron nitride aerogel particles and ethanol are mixed, the mass ratio of the two is 1:(35-45).

9. The method for preparing the antibacterial down jacket fabric with aerogel coating according to claim 7, characterized in that: In the step 3, the volume ratio of the mixed solution A, the sodium tripolyphosphate solution, the fermented product of Houttuynia cordata and the chitosan solution is (15-25):1:(5-10):(8-12).

10. The method for preparing the antibacterial down jacket fabric with aerogel coating according to claim 7, characterized in that: In the step 2, the fermentation temperature is 25-30° C. and the fermentation time is 24-48 hours.

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