Preparation method of mica-added anti-ultraviolet aging thermal insulation fabric

Abstract

The invention provides a method for preparing a thermal insulation fabric with anti-ultraviolet aging added with mica, belonging to the field of fabrics; the preparation process thereof comprises the following steps: preparing an antibacterial treatment liquid; preparing an inner layer fabric; preparing a middle layer fabric; preparing an outer layer fabric; and bonding. The thermal insulation fabric with anti-ultraviolet aging is composited by an outer layer fabric with anti-ultraviolet aging performance and thermal insulation performance, a middle layer fabric with thermal insulation performance, and an inner layer fabric with antibacterial performance. Since it has excellent anti-ultraviolet performance, thermal insulation performance, and antibacterial performance, it also has good air permeability, thereby being able to effectively extend the service life of the fabric and improve the practicality of the fabric.

Description

Technical Field

[0001] The invention relates to the field of fabrics, and in particular to a method for preparing a mica-added anti-ultraviolet aging thermal insulation fabric. Background Art

[0002] With the improvement of people's living standards and the emphasis on health, the demand for functional fabrics is growing. Among many functional fabrics, fabrics with thermal insulation properties have received widespread attention. In a cold environment, fabrics with good thermal insulation properties are essential for human comfort.

[0003] However, existing thermal insulation fabrics often find it difficult to strike a balance between thermal insulation effect and breathability. Moreover, thermal insulation fabrics usually do not have anti-ultraviolet aging performance. Ultraviolet aging will cause the thermal insulation material to degrade, resulting in a significant decrease in thermal insulation performance. In addition, long-term exposure to ultraviolet rays will cause the color of the fabric to fade, reduce strength, and shorten its service life.

[0004] Therefore, it is necessary to propose a method for preparing a mica-added anti-ultraviolet aging thermal insulation fabric with good air permeability to extend the service life of the fabric. Summary of the invention

[0005] In view of the shortcomings of the prior art, the object of the present invention is to provide a method for preparing a thermal insulation fabric with anti-ultraviolet aging by adding mica.

[0006] A method for preparing a thermal insulation fabric with anti-ultraviolet aging by adding mica, comprising the following steps:

[0007] S1: Preparation of antimicrobial treatment solution

[0008] Prepare gingerol oil solution and β-cyclodextrin solution respectively, add β-cyclodextrin solution into gingerol oil solution to prepare gingerol microcapsules for standby use, then dissolve isatis root extract and green tea extract in distilled water, add gingerol microcapsules and sodium carboxymethyl cellulose to obtain antibacterial treatment solution;

[0009] S2: Preparation of inner fabric

[0010] Prepare a mixed treatment liquid, immerse the cotton cloth in the mixed treatment liquid, take it out, wash it with water, dry it, immerse it in the antibacterial treatment liquid, add an organosilicon cross-linking agent and an organosilicon softener, heat it, take it out, dry it, and cross-link it by curing to obtain an inner layer fabric;

[0011] S3: Preparation of middle layer fabric

[0012] The linear triblock copolymer SEBS is dissolved in cyclohexane, and then heat-expandable microspheres are added to prepare a heat-expandable microsphere dispersion, and then the shaped viscose fiber is added, impregnated, and dried to obtain a middle layer fabric;

[0013] S4: Preparation of outer fabric

[0014] The water-based polyurethane, Tween, Span and water are mixed evenly, and then mica powder, titanium dioxide powder, silicon dioxide aerogel powder and defoaming agent are added to prepare a composite thermal insulation coating, and then the composite thermal insulation coating is evenly coated on the surface of the nylon fabric, and after drying, the outer fabric is obtained;

[0015] S5: Bonding

[0016] The outer layer fabric, the middle layer fabric and the inner layer fabric are sequentially bonded together by using an organic silicone resin adhesive to obtain an anti-ultraviolet aging heat-insulating fabric.

[0017] Furthermore, S1 specifically includes the following steps:

[0018] S1.1: Add gingerol oil to anhydrous ethanol in a mass ratio of 1:(2-4), stir and mix well to obtain a gingerol oil solution;

[0019] S1.2: Add β-cyclodextrin into deionized water at a solid-liquid ratio of 1 g: (10-20) mL, stir thoroughly to dissolve, and obtain a β-cyclodextrin solution;

[0020] S1.3: adding the gingerol oil solution to the β-cyclodextrin solution while stirring, and oscillating in an oscillator at 60-70° C. for 2-3 hours, and then curing at 3-5° C. for 8-10 hours, filtering, standing and drying to obtain gingerol microcapsules;

[0021] S1.4: Add Radix Isatidis extract and green tea extract into distilled water at a solid-liquid ratio of (3-5) g: 1 g: (20-30) mL, and stir at a rate of 500-600 r / min for 1-2 h. After filtering, a mixed extract solution is obtained;

[0022] S1.5: Add the gingerol microcapsules to the mixed extract solution while stirring, then add 1-3% of sodium carboxymethyl cellulose by mass of the system, and homogenize for 20-30 minutes to obtain an antibacterial treatment solution.

[0023] Furthermore, S2 specifically includes the following steps:

[0024] S2.1: Stir and mix hydrogen peroxide, sodium hydroxide, sodium silicate and sodium carboxymethyl cellulose in a mass ratio of (5-6): (2-3): (1-2): 1 to prepare a mixed treatment solution;

[0025] S2.2: immersing the cotton cloth in the mixed treatment solution and heating it at 80-90°C for 40-50 minutes, taking it out, washing it with water and drying it to obtain the pretreated cotton cloth;

[0026] S2.3: Immerse the pretreated cotton cloth in the antibacterial treatment solution prepared in step S1.5, add an organosilicon crosslinking agent and an organosilicon softener, and heat at 80-90°C for 1-2h. After taking it out, dry it, and then cure and crosslink it at 120-140°C for 1-2min to obtain the inner layer fabric.

[0027] Furthermore, S3 specifically includes the following steps:

[0028] S3.1: Add the linear triblock copolymer SEBS into cyclohexane at a solid-liquid ratio of 1 g: (25-45) mL, stir at a rate of 400-500 r / min for 1-2 h to fully dissolve, and obtain a SEBS solution;

[0029] S3.2: Add 4-6wt% of heat-expandable microspheres to the above SEBS solution, continue stirring for 2-3h, and then homogenize for 10-20min to obtain a dispersion of heat-expandable microspheres;

[0030] S3.3: Use a mold to shape the viscose fiber, then place it in the above-mentioned heat-expandable microsphere dispersion, immerse it for 2-3 hours, then take it out and dry it to obtain the middle layer fabric.

[0031] Furthermore, S4 specifically includes the following steps:

[0032] S4.1: Mix waterborne polyurethane, Tween, Span and water in a mass ratio of (6-8):1:(1-2):(8-10) to obtain a blend;

[0033] S4.2: Add mica powder, titanium dioxide powder and silicon dioxide aerogel powder to the above blended liquid, add a defoamer, and stir at a rate of 800-1000 r / min for 4-5 hours to obtain a composite thermal insulation coating;

[0034] S4.3: At room temperature, use a scraper to dip the coating to evenly coat the composite thermal insulation coating on the surface of the nylon fabric from top to bottom and from left to right, then place it in a blast drying oven and dry it at 70-80°C for 2-3 hours to obtain the outer fabric.

[0035] Furthermore, the mass ratio of gingerol oil to β-cyclodextrin is 1:(6-8).

[0036] Furthermore, the mass ratio of the total mass of the Radix Isatidis extract and the green tea extract to the gingerol microcapsule is 1:(10-14).

[0037] Furthermore, the added amounts of the organosilicon crosslinking agent and the organosilicon softener are 2-3% and 1% of the mass of the cotton cloth, respectively.

[0038] Furthermore, the mass ratio of mica powder, titanium dioxide powder and silica aerogel powder is 1:(1-3):(2-3), and the total amount of mica powder, titanium dioxide powder and silica aerogel powder added is 3-5wt%.

[0039] Furthermore, the amount of the defoaming agent added is 0.5-1wt%.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] 1. The anti-ultraviolet aging thermal insulation fabric of the present invention is composited by an outer layer fabric with anti-ultraviolet aging performance and thermal insulation performance, a middle layer fabric with thermal insulation performance and an inner layer fabric with antibacterial performance. Since it has excellent anti-ultraviolet performance, thermal insulation performance and antibacterial performance, it also has good air permeability, thereby being able to effectively extend the service life of the fabric and improve the practicality of the fabric.

[0042] 2. The present invention prepares a composite thermal insulation coating by mixing water-based polyurethane, Tween, Span and water and then adding mica powder, titanium dioxide, silica aerogel powder and a defoaming agent. Since mica has good elasticity, toughness, insulation, high temperature resistance, acid and alkali resistance, corrosion resistance, strong adhesion and other characteristics, silica aerogel has excellent thermal insulation performance, and titanium dioxide has excellent ultraviolet shielding ability, the three are compounded. On the one hand, the high temperature resistance of mica can produce a gain effect with the thermal insulation performance of silica aerogel. On the other hand, mica also has a certain ultraviolet shielding ability, and compounding with titanium dioxide can synergistically enhance the ability to resist ultraviolet aging. Therefore, after the composite thermal insulation coating is evenly coated on the surface of nylon fabric, the anti-ultraviolet aging performance and thermal insulation performance of nylon fabric can be effectively improved.

[0043] 3. The present invention uses heat-expandable microspheres as thermal insulation functional components and linear tri-embedded copolymer SEBS as a binder. After the linear tri-embedded copolymer SEBS is dissolved in cyclohexane, the heat-expandable microspheres are dispersed in the cyclohexane solution of SEBS, and then the shaped viscose fibers are impregnated to prepare a middle-layer fabric of heat-expandable microspheres / viscose fibers composite. After the middle-layer fabric is bonded to the outer-layer fabric and the inner-layer fabric, the thermal insulation performance of the prepared anti-ultraviolet aging thermal insulation fabric can be further improved.

[0044] 4. The present invention dissolves gingerol oil and β-cyclodextrin in anhydrous ethanol and deionized water respectively, and then mixes the two to prepare β-cyclodextrin-coated gingerol microcapsules to reduce the loss of effective ingredients of gingerol. The gingerol microcapsules are then mixed with Radix Isatidis extract and green tea extract to prepare an antibacterial treatment liquid, and the antibacterial treatment liquid is used to treat cotton cloth to prepare an inner layer fabric with antibacterial properties. After the inner layer fabric is bonded to the outer layer fabric and the middle layer fabric, the anti-ultraviolet aging thermal insulation fabric can be given excellent antibacterial properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0046] Figure 1 This is a flow chart of a method for preparing a thermal insulation fabric with anti-ultraviolet aging and mica added adopted in an embodiment of the present invention;

[0047] Figure 2 This is a summary diagram of the performance test results of Examples 1-3 of the present invention. DETAILED DESCRIPTION

[0048] The following is a detailed description of a method for preparing a thermal insulation fabric with anti-ultraviolet aging and added mica provided by the present invention in conjunction with the accompanying drawings and specific embodiments.

[0049] Example 1

[0050] A method for preparing a thermal insulation fabric with anti-ultraviolet aging by adding mica, comprising the following steps:

[0051] S1: Preparation of antimicrobial treatment solution

[0052] The gingerol oil was added to anhydrous ethanol at a mass ratio of 1:2, and the mixture was stirred to obtain a gingerol oil solution for use. Then, β-cyclodextrin was added to deionized water at a solid-liquid ratio of 1g:10mL, and the mixture was fully stirred to dissolve to obtain a β-cyclodextrin solution. The gingerol oil solution was then added to the β-cyclodextrin solution while stirring, and the mixture was oscillated in an oscillator at 60°C for 2h, and then cured at 3°C ​​for 8h. After filtration, standing and drying, gingerol microcapsules were obtained for use. The gingerol oil and β-cyclodextrin had a mass ratio of 1:2. The mass ratio is 1:6, then, the Radix Isatidis extract and the green tea extract are added to the distilled water at a solid-liquid ratio of 3g:1g:20mL, and stirred at a rate of 500r / min for 1h, filtered to obtain a mixed extract solution, and finally, the gingerol microcapsules are added to the mixed extract solution while stirring, and then 1% of the system mass of sodium carboxymethyl cellulose is added, and homogenized for 20min to obtain an antibacterial treatment solution, wherein the total mass ratio of the Radix Isatidis extract and the green tea extract to the gingerol microcapsule is 1:10;

[0053] S2: Preparation of inner fabric

[0054] Hydrogen peroxide, sodium hydroxide, sodium silicate and sodium carboxymethyl cellulose are stirred and mixed uniformly in a mass ratio of 5:2:1:1 to prepare a mixed treatment liquid, and then the cotton cloth is immersed in the mixed treatment liquid and heated at a temperature of 80°C for 40 minutes. After being taken out, it is washed and dried to obtain a pretreated cotton cloth, and then the pretreated cotton cloth is immersed in the antibacterial treatment liquid prepared in step S1, and then an organic silicon crosslinking agent and an organic silicon softener are added, and heated at 80°C for 1 hour. After being taken out, it is dried, and then cross-linked at 120°C for 1 minute to obtain an inner layer fabric, wherein the addition amounts of the organic silicon crosslinking agent and the organic silicon softener are 2% and 1% of the mass of the cotton fabric, respectively;

[0055] S3: Preparation of middle layer fabric

[0056] The linear triblock copolymer SEBS was added to cyclohexane at a solid-liquid ratio of 1g:25mL, and stirred at a rate of 400r / min for 1h to fully dissolve to obtain a SEBS solution, and then 4wt% of heat-expandable microspheres were added to the SEBS solution, and the stirring was continued for 2h, and then homogenized for 10min to obtain a heat-expandable microsphere dispersion. Finally, the viscose fiber was shaped with a mold, and then placed in the heat-expandable microsphere dispersion, immersed for 2h, taken out and dried to obtain a middle layer fabric;

[0057] S4: Preparation of outer fabric

[0058] Aqueous polyurethane, Tween, Span and water were stirred and mixed uniformly in a mass ratio of 6:1:1:8 to obtain a blended liquid, and then mica powder, titanium dioxide powder and silica aerogel powder were added to the blended liquid in a mass ratio of 1:1:2, and then 0.5wt% of a defoamer was added, and stirred at a rate of 800r / min for 4h to obtain a composite thermal insulation coating, wherein the total amount of mica powder, titanium dioxide powder and silica aerogel powder added was 3wt%. Finally, at room temperature, the composite thermal insulation coating was evenly coated on the surface of the nylon fabric from top to bottom and from left to right by using a scraper dip coating method, and then placed in a blast drying oven and dried at 70°C for 2h to obtain an outer layer fabric;

[0059] S5: Bonding

[0060] The outer layer fabric, the middle layer fabric and the inner layer fabric are sequentially bonded together by using an organic silicone resin adhesive to obtain an anti-ultraviolet aging heat-insulating fabric.

[0061] Performance Testing:

[0062] 1. Thermal insulation performance test. The thermal insulation rate of the anti-ultraviolet aging thermal insulation fabric was tested according to GB / T11048-2008 standard. The results are as follows: Figure 2 As shown;

[0063] 2. Air permeability test. Cut the prepared anti-ultraviolet aging thermal insulation fabric into squares of 10cm×10cm to obtain samples 1, 2, and 3. Then fix samples 1, 2, and 3 in the test instrument, with air above the samples and water below. Use an air pump to press air into the samples from above, and then observe the changes in the bubbles in the water below the samples. The results are as follows: Figure 2 As shown;

[0064] 3. Anti-ultraviolet aging performance test. The UV aging test of the prepared anti-ultraviolet aging thermal insulation fabric was carried out using a UV aging box, and the UV intensity was 5000μw / cm 2 The wavelength of the UV lamp is 300nm, the aging temperature is 50℃, the aging time is 20h, and the tensile properties are measured using a universal tensile testing machine before and after UV aging. The fracture strength retention rate is calculated based on the measured fracture strength. The results are as follows: Figure 2 As shown;

[0065] 4. Antibacterial test. Refer to GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles Part 3: Oscillation method", dilute the bacterial solution to an appropriate multiple by 10-fold dilution method and culture it, and calculate the antibacterial rate of the anti-ultraviolet aging thermal insulation fabric based on the average value of the live bacteria concentration of the control sample and the experimental sample after 18 hours. The results are as follows: Figure 2 shown.

[0066] Example 2

[0067] A method for preparing a thermal insulation fabric with anti-ultraviolet aging by adding mica, comprising the following steps:

[0068] S1: Preparation of antimicrobial treatment solution

[0069] The gingerol oil was added to anhydrous ethanol at a mass ratio of 1:3, and the mixture was stirred to obtain a gingerol oil solution for use. Then, β-cyclodextrin was added to deionized water at a solid-liquid ratio of 1g:15mL, and the mixture was fully stirred to dissolve to obtain a β-cyclodextrin solution. The gingerol oil solution was then added to the β-cyclodextrin solution while stirring, and the mixture was oscillated in an oscillator at 65°C for 2.5h, and then cured at 4°C for 9h. After filtration, standing and drying, gingerol microcapsules were obtained for use. The gingerol oil and β-cyclodextrin had a mass ratio of 1:3. The mass ratio is 1:7, then, the Radix Isatidis extract and the green tea extract are added to the distilled water at a solid-liquid ratio of 4g:1g:25mL, and stirred at a rate of 550r / min for 1.5h, filtered to obtain a mixed extract solution, and finally, the gingerol microcapsules are added to the mixed extract solution while stirring, and then 2% of the system mass of sodium carboxymethyl cellulose is added, and homogenized for 25min to obtain an antibacterial treatment solution, wherein the total mass ratio of the Radix Isatidis extract and the green tea extract to the gingerol microcapsule is 1:12;

[0070] S2: Preparation of inner fabric

[0071] Hydrogen peroxide, sodium hydroxide, sodium silicate and sodium carboxymethyl cellulose are stirred and mixed uniformly in a mass ratio of 5.5:2.5:1.5:1 to prepare a mixed treatment liquid, and then the cotton cloth is immersed in the mixed treatment liquid and heated at a temperature of 85°C for 45 minutes. After being taken out, it is washed and dried to obtain a pretreated cotton cloth, and then the pretreated cotton cloth is immersed in the antibacterial treatment liquid prepared in step S1, and then an organic silicon cross-linking agent and an organic silicon softener are added, and heated at 85°C for 1.5 hours. After being taken out, it is dried, and then cross-linked at 130°C for 1.5 minutes to obtain an inner layer fabric, wherein the addition amounts of the organic silicon cross-linking agent and the organic silicon softener are 2.5% and 1% of the mass of the cotton fabric, respectively;

[0072] S3: Preparation of middle layer fabric

[0073] The linear triblock copolymer SEBS was added to cyclohexane at a solid-liquid ratio of 1g:35mL, and stirred at a rate of 450r / min for 1.5h to fully dissolve to obtain a SEBS solution, and then 5wt% of heat-expandable microspheres were added to the SEBS solution, and the stirring was continued for 2.5h, and then homogenized for 15min to obtain a heat-expandable microsphere dispersion. Finally, the viscose fiber was shaped with a mold, and then placed in the heat-expandable microsphere dispersion, immersed for 2.5h, taken out and dried to obtain a middle layer fabric;

[0074] S4: Preparation of outer fabric

[0075] Aqueous polyurethane, Tween, Span and water were stirred and mixed uniformly in a mass ratio of 7:1:1.5:10 to obtain a blended liquid, and then mica powder, titanium dioxide powder and silica aerogel powder were added to the blended liquid in a mass ratio of 1:2:2.5, and then 0.75wt% of a defoamer was added, and stirred at a rate of 900r / min for 4.5h to obtain a composite thermal insulation coating, wherein the total amount of mica powder, titanium dioxide powder and silica aerogel powder added was 4wt%. Finally, at room temperature, the composite thermal insulation coating was evenly coated on the surface of the nylon fabric from top to bottom and from left to right by using a scraper dip coating method, and then placed in a blast drying oven and dried at 75°C for 2.5h to obtain an outer layer fabric;

[0076] S5: Bonding

[0077] The outer layer fabric, the middle layer fabric and the inner layer fabric are sequentially bonded together by using an organic silicone resin adhesive to obtain an anti-ultraviolet aging heat-insulating fabric.

[0078] Performance Testing:

[0079] 1. Thermal insulation performance test. The thermal insulation rate of the anti-ultraviolet aging thermal insulation fabric was tested according to GB / T11048-2008 standard. The results are as follows: Figure 2 As shown;

[0080] 2. Air permeability test. Cut the prepared anti-ultraviolet aging thermal insulation fabric into squares of 10cm×10cm to obtain samples 1, 2, and 3. Then fix samples 1, 2, and 3 in the test instrument, with air above the samples and water below. Use an air pump to press air into the samples from above, and then observe the changes in the bubbles in the water below the samples. The results are as follows: Figure 2 As shown;

[0081] 3. Anti-ultraviolet aging performance test. The UV aging test of the prepared anti-ultraviolet aging thermal insulation fabric was carried out using a UV aging box, and the UV intensity was 5000μw / cm 2 The wavelength of the UV lamp is 300nm, the aging temperature is 50℃, the aging time is 20h, and the tensile properties are measured using a universal tensile testing machine before and after UV aging. The fracture strength retention rate is calculated based on the measured fracture strength. The results are as follows: Figure 2 As shown;

[0082] 4. Antibacterial test. Refer to GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles Part 3: Oscillation method", dilute the bacterial solution to an appropriate multiple by 10-fold dilution method and culture it, and calculate the antibacterial rate of the anti-ultraviolet aging thermal insulation fabric based on the average value of the live bacteria concentration of the control sample and the experimental sample after 18 hours. The results are as follows: Figure 2 shown.

[0083] Example 3

[0084] A method for preparing a thermal insulation fabric with anti-ultraviolet aging by adding mica, comprising the following steps:

[0085] S1: Preparation of antimicrobial treatment solution

[0086] The gingerol oil was added to anhydrous ethanol at a mass ratio of 1:4, and the mixture was stirred to obtain a gingerol oil solution for use. Then, β-cyclodextrin was added to deionized water at a solid-liquid ratio of 1g:20mL, and the mixture was fully stirred to dissolve to obtain a β-cyclodextrin solution. The gingerol oil solution was then added to the β-cyclodextrin solution while stirring, and the mixture was oscillated in an oscillator at 70°C for 3h, and then cured at 5°C for 10h. After filtration, standing and drying, gingerol microcapsules were obtained for use. The gingerol oil and β-cyclodextrin had a mass ratio of 1:4. The mass ratio is 1:8, then, the Radix Isatidis extract and the green tea extract are added to the distilled water at a solid-liquid ratio of 5g:1g:30mL, and stirred at a rate of 600r / min for 2h, filtered to obtain a mixed extract solution, and finally, the gingerol microcapsules are added to the mixed extract solution while stirring, and then 3% of the system mass of sodium carboxymethyl cellulose is added, and homogenized for 30min to obtain an antibacterial treatment solution, wherein the total mass ratio of the Radix Isatidis extract and the green tea extract to the gingerol microcapsule is 1:14;

[0087] S2: Preparation of inner fabric

[0088] Hydrogen peroxide, sodium hydroxide, sodium silicate and sodium carboxymethyl cellulose are stirred and mixed evenly in a mass ratio of 6:3:2:1 to prepare a mixed treatment solution, and then the cotton cloth is immersed in the mixed treatment solution and heated at a temperature of 90°C for 50 minutes. After being taken out, it is washed and dried to obtain a pretreated cotton cloth, and then the pretreated cotton cloth is immersed in the antibacterial treatment solution prepared in step S1, and then an organic silicon crosslinking agent and an organic silicon softener are added, and heated at 90°C for 2 hours. After being taken out, it is dried, and then cross-linked at 140°C for 2 minutes to obtain an inner layer fabric, wherein the addition amounts of the organic silicon crosslinking agent and the organic silicon softener are 3% and 1% of the mass of the cotton fabric, respectively;

[0089] S3: Preparation of middle layer fabric

[0090] The linear triblock copolymer SEBS was added to cyclohexane at a solid-liquid ratio of 1g:45mL, and stirred at a rate of 500r / min for 2h to fully dissolve to obtain a SEBS solution, and then 6wt% of heat-expandable microspheres were added to the SEBS solution, and the stirring was continued for 3h, and then homogenized for 20min to obtain a heat-expandable microsphere dispersion. Finally, the viscose fiber was shaped with a mold, and then placed in the heat-expandable microsphere dispersion, immersed for 3h, taken out and dried to obtain a middle layer fabric;

[0091] S4: Preparation of outer fabric

[0092] Aqueous polyurethane, Tween, Span and water were stirred and mixed uniformly in a mass ratio of 8:1:2:10 to obtain a blended liquid, and then mica powder, titanium dioxide powder and silica aerogel powder were added to the blended liquid in a mass ratio of 1:3:3, and then 1wt% of a defoamer was added, and stirred at a rate of 1000r / min for 5h to obtain a composite thermal insulation coating, wherein the total amount of mica powder, titanium dioxide powder and silica aerogel powder added was 5wt%. Finally, at room temperature, the composite thermal insulation coating was evenly coated on the surface of the nylon fabric from top to bottom and from left to right by using a scraper dip coating method, and then placed in a blast drying oven and dried at 80°C for 3h to obtain an outer layer fabric;

[0093] S5: Bonding

[0094] The outer layer fabric, the middle layer fabric and the inner layer fabric are sequentially bonded together by using an organic silicone resin adhesive to obtain an anti-ultraviolet aging heat-insulating fabric.

[0095] Performance Testing:

[0096] 1. Thermal insulation performance test. The thermal insulation rate of the anti-ultraviolet aging thermal insulation fabric was tested according to GB / T11048-2008 standard. The results are as follows: Figure 2 As shown;

[0097] 2. Air permeability test. Cut the prepared anti-ultraviolet aging thermal insulation fabric into squares of 10cm×10cm to obtain samples 1, 2, and 3. Then fix samples 1, 2, and 3 in the test instrument, with air above the samples and water below. Use an air pump to press air into the samples from above, and then observe the changes in the bubbles in the water below the samples. The results are as follows: Figure 2 As shown;

[0098] 3. Anti-ultraviolet aging performance test. The UV aging test of the prepared anti-ultraviolet aging thermal insulation fabric was carried out using a UV aging box, and the UV intensity was 5000μw / cm 2 The wavelength of the UV lamp is 300nm, the aging temperature is 50℃, the aging time is 20h, and the tensile properties are measured using a universal tensile testing machine before and after UV aging. The fracture strength retention rate is calculated based on the measured fracture strength. The results are as follows: Figure 2 As shown;

[0099] 4. Antibacterial test. Refer to GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles Part 3: Oscillation method", dilute the bacterial solution to an appropriate multiple by 10-fold dilution method and culture it, and calculate the antibacterial rate of the anti-ultraviolet aging thermal insulation fabric based on the average value of the live bacteria concentration of the control sample and the experimental sample after 18 hours. The results are as follows: Figure 2 shown.

[0100] Comparative Example 1

[0101] The difference between this comparative example 1 and example 1 is that the mica powder in step S4 is replaced by an equal amount of titanium dioxide powder, and then the performance test is performed according to the performance test method in example 1. The test results are shown in Table 1 below.

[0102] Comparative Example 2

[0103] The difference between this comparative example 1 and example 1 is that the titanium dioxide powder in step S4 is replaced by an equal amount of mica powder, and then the performance test is performed according to the performance test method in example 1. The test results are shown in Table 1 below.

[0104]

[0105] Comparative Example 3

[0106] The difference between this comparative example 1 and example 1 is that the mica powder in step S4 is replaced by an equal amount of silica aerogel powder, and then the performance test is performed according to the performance test method in example 1. The test results are shown in Table 2 below.

[0107] Comparative Example 4

[0108] The difference between this comparative example 1 and example 1 is that the silica aerogel powder in step S4 is replaced with an equal amount of mica powder, and then the performance test is performed according to the performance test method in example 1. The test results are shown in Table 2 below.

[0109]

[0110] It can be seen from Table 1 and Table 2 that after replacing mica powder with an equal amount of titanium dioxide powder in Comparative Example 1 and replacing titanium dioxide powder with an equal amount of mica powder in Comparative Example 2, the ultraviolet aging fracture strength retention rate of the prepared fabric is lower than that of Example 1, and after replacing mica powder with an equal amount of silica aerogel powder in Comparative Example 3 and replacing silica aerogel powder with an equal amount of mica powder in Comparative Example 4, the warmth retention rate of the prepared fabric is lower than that of Example 1. It can be seen that by mixing water-based polyurethane, Tween, Span and water and then adding mica powder, titanium dioxide, silica aerogel powder and defoaming agent to prepare a composite thermal insulation coating, Since mica has good elasticity, toughness, insulation, high temperature resistance, acid and alkali resistance, corrosion resistance, strong adhesion and other properties, silica aerogel has excellent thermal insulation properties, and titanium dioxide has excellent ultraviolet shielding ability, the three are compounded. On the one hand, the high temperature resistance of mica can produce a gain effect with the thermal insulation performance of silica aerogel. On the other hand, mica also has a certain ultraviolet shielding ability, and compounding with titanium dioxide can synergistically enhance the ability to resist ultraviolet aging. Therefore, after the composite thermal insulation coating is evenly coated on the surface of nylon fabric, it can effectively improve the anti-ultraviolet aging and thermal insulation properties of nylon fabric.

[0111] Comparative Example 5

[0112] The difference between this comparative example and Example 1 is that step S3 is removed, and the middle layer fabric in step S5 is replaced by viscose fiber shaped by a mold, and then a performance test is performed referring to the performance test method in Example 1, and the results are shown in Table 3 below.

[0113]

[0114] As can be seen from Table 3, when viscose fiber is directly used as the middle layer fabric in Comparative Example 5, the warmth retention rate of the composite fabric obtained is about 46%, which is much lower than that of Example 1. It can be seen that, by using heat-expandable microspheres as the thermal insulation functional component and the linear tri-embedded copolymer SEBS as the adhesive, the linear tri-embedded copolymer SEBS is dissolved in cyclohexane, and then the heat-expandable microspheres are dispersed in the cyclohexane solution of SEBS, and then the shaped viscose fiber is impregnated to prepare a heat-expandable microsphere / viscose fiber composite middle layer fabric, and after the middle layer fabric is bonded to the outer layer fabric and the inner layer fabric, the thermal insulation performance of the obtained anti-ultraviolet aging thermal insulation fabric can be further improved.

[0115] Comparative Example 6

[0116] The difference between this comparative example and Example 1 is that steps S1 and S2 are removed, and the inner layer fabric in step S5 is replaced with cotton fabric, and then the performance test is carried out according to the performance test method in Example 1, and the results are shown in Table 4 below.

[0117]

[0118] As can be seen from Table 4, after the specially treated inner fabric was replaced with untreated cotton fabric in Comparative Example 6, the antibacterial rate of the composite fabric obtained was 0. It can be seen that by first dissolving gingerol oil and β-cyclodextrin in anhydrous ethanol and deionized water respectively, and then mixing the two to prepare β-cyclodextrin-coated gingerol microcapsules, the loss of gingerol effective ingredients was reduced, and then the gingerol microcapsules were mixed with Isatis root extract and green tea extract to prepare an antibacterial treatment liquid, and the cotton fabric was treated with the antibacterial treatment liquid to prepare an inner fabric with antibacterial properties. After the inner fabric was bonded to the outer fabric and the middle fabric, the anti-ultraviolet aging thermal insulation fabric could be given excellent antibacterial properties.

[0119] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for preparing a thermal insulation fabric with anti-ultraviolet aging by adding mica, characterized in that: The steps include: S1: Preparation of antimicrobial treatment solution Prepare gingerol oil solution and β-cyclodextrin solution respectively, add β-cyclodextrin solution into gingerol oil solution to prepare gingerol microcapsules for standby use, then dissolve isatis root extract and green tea extract in distilled water, add gingerol microcapsules and sodium carboxymethyl cellulose to obtain antibacterial treatment solution; S2: Preparation of inner fabric The hydrogen peroxide, sodium hydroxide, sodium silicate and sodium carboxymethyl cellulose are stirred and mixed uniformly in a mass ratio of (5-6): (2-3): (1-2): 1 to prepare a mixed treatment liquid, and then the cotton cloth is immersed in the mixed treatment liquid, taken out, washed, dried, and then immersed in the above antibacterial treatment liquid, and an organic silicon cross-linking agent and an organic silicon softener are added, and the inner layer fabric is obtained by heating, taking out, drying and curing and cross-linking; S3: Preparation of middle layer fabric The linear triblock copolymer SEBS is dissolved in cyclohexane, and then heat-expandable microspheres are added to prepare a heat-expandable microsphere dispersion, and then the shaped viscose fiber is added, impregnated, and dried to obtain a middle layer fabric; S4: Preparation of outer fabric The water-based polyurethane, Tween, Span and water are mixed evenly, and then mica powder, titanium dioxide powder, silicon dioxide aerogel powder and defoaming agent are added to prepare a composite thermal insulation coating, and then the composite thermal insulation coating is evenly coated on the surface of the nylon fabric, and after drying, the outer fabric is obtained; S5: Bonding The outer layer fabric, the middle layer fabric and the inner layer fabric are sequentially bonded together by using an organic silicone resin adhesive to obtain an anti-ultraviolet aging heat-insulating fabric.

2. The method for preparing a thermal insulation fabric with added mica and anti-ultraviolet aging according to claim 1, characterized in that: S1 specifically includes the following steps: S1.1: Add gingerol oil to anhydrous ethanol in a mass ratio of 1:(2-4), stir and mix well to obtain a gingerol oil solution; S1.2: Add β-cyclodextrin into deionized water at a solid-liquid ratio of 1 g: (10-20) mL, stir thoroughly to dissolve, and obtain a β-cyclodextrin solution; S1.3: adding the gingerol oil solution to the β-cyclodextrin solution while stirring, and oscillating in an oscillator at 60-70° C. for 2-3 hours, and then curing at 3-5° C. for 8-10 hours, filtering, standing and drying to obtain gingerol microcapsules; S1.4: Add Radix Isatidis extract and green tea extract into distilled water at a solid-liquid ratio of (3-5) g: 1 g: (20-30) mL, and stir at a rate of 500-600 r / min for 1-2 h. After filtering, a mixed extract solution is obtained; S1.5: Add the gingerol microcapsules to the mixed extract solution while stirring, then add 1-3% of the system mass of sodium carboxymethyl cellulose, and homogenize for 20-30 minutes to obtain an antibacterial treatment solution.

3. The method for preparing a thermal insulation fabric with added mica for anti-ultraviolet aging according to claim 2, characterized in that: S2 specifically includes the following steps: S2.1: immersing the cotton cloth in the mixed treatment solution and heating it at 80-90° C. for 40-50 min, taking it out, washing it with water and drying it to obtain the pretreated cotton cloth; S2.2: Immerse the pretreated cotton cloth in the antibacterial treatment solution prepared in step S1.5, add an organosilicon crosslinking agent and an organosilicon softener, and heat at 80-90°C for 1-2h. After taking it out, dry it, and then cure and crosslink it at 120-140°C for 1-2min to obtain the inner layer fabric.

4. The method for preparing a thermal insulation fabric with added mica and anti-ultraviolet aging according to claim 1, characterized in that: S3 specifically includes the following steps: S3.1: Add the linear triblock copolymer SEBS into cyclohexane at a solid-liquid ratio of 1 g: (25-45) mL, stir at a rate of 400-500 r / min for 1-2 h to fully dissolve, and obtain a SEBS solution; S3.2: Add 4-6wt% of heat-expandable microspheres to the above SEBS solution, continue stirring for 2-3h, and then homogenize for 10-20min to obtain a dispersion of heat-expandable microspheres; S3.3: Use a mold to shape the viscose fiber, then place it in the above-mentioned heat-expandable microsphere dispersion, immerse it for 2-3 hours, then take it out and dry it to obtain the middle layer fabric.

5. The method for preparing a thermal insulation fabric with added mica and anti-ultraviolet aging according to claim 1, characterized in that: S4 specifically includes the following steps: S4.1: Mix waterborne polyurethane, Tween, Span and water in a mass ratio of (6-8):1:(1-2):(8-10) to obtain a blend; S4.2: Add mica powder, titanium dioxide powder and silicon dioxide aerogel powder to the above blended liquid, add a defoamer, and stir at a rate of 800-1000 r / min for 4-5 hours to obtain a composite thermal insulation coating; S4.3: At room temperature, use a scraper to dip the coating to evenly coat the composite thermal insulation coating on the surface of the nylon fabric from top to bottom and from left to right, then place it in a blast drying oven and dry it at 70-80°C for 2-3 hours to obtain the outer fabric.

6. The method for preparing a thermal insulation fabric with added mica for anti-ultraviolet aging according to claim 2, characterized in that: The mass ratio of gingerol oil to β-cyclodextrin is 1:(6-8).

7. The method for preparing a thermal insulation fabric with added mica and anti-ultraviolet aging according to claim 2, characterized in that: The mass ratio of the total mass of Radix Isatidis extract and green tea extract to the mass ratio of gingerol microcapsules is 1: (10-14)。 8. The method for preparing a thermal insulation fabric with added mica and anti-ultraviolet aging according to claim 3, characterized in that: The added amounts of the organosilicon crosslinking agent and the organosilicon softener are 2-3% and 1% of the mass of the cotton cloth respectively.

9. The method for preparing a thermal insulation fabric with added mica and anti-ultraviolet aging according to claim 5, characterized in that: The mass ratio of mica powder, titanium dioxide powder and silicon dioxide aerogel powder is 1:(1-3): (2-3), and the total amount of mica powder, titanium dioxide powder and silicon dioxide aerogel powder added is 3-5wt%.

10. The method for preparing a thermal insulation fabric with added mica for anti-ultraviolet aging according to claim 5, characterized in that: The amount of defoamer added is 0.5-1wt%.

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