Skin-friendly super warm-keeping flannel fabric and preparation method thereof

Abstract

The invention relates to a skin-friendly super warm-keeping flannel fabric and a preparation method thereof, and relates to the technical field of textile fabrics, and the skin-friendly super warm-keeping flannel fabric comprises the following components in percentage by mass: 60-80% of enzyme modified cotton fibers, 15-30% of conductive modified wool fibers and 5-10% of microcapsule phase change material modified polyester fibers. The preparation method comprises the following steps: soaking enzyme modified cotton fibers, conductive modified wool fibers and microcapsule phase change material modified polyester fibers into a compatilizer solution according to the mass percentage, stirring and mixing, blending to obtain blended fibers, and weaving the blended fibers to obtain gray fabric; the gray fabric is sequentially subjected to carding, ironing, pre-shaping, dyeing, shaping and drying, sanding and rolling treatment, and the skin-friendly super-warm-keeping flannel fabric is obtained. The flannel fabric has the effects of improving the heat preservation performance, the antibacterial performance and the antistatic performance of the flannel fabric, and the fabric can keep warm for a long time and has good skin-friendly performance and comfort.

Description

Technical Field

[0001] The present application relates to the technical field of textile fabrics, and in particular to a skin-friendly and ultra-warm flannel fabric and a preparation method thereof. Background Art

[0002] With the improvement of living standards, consumers' requirements for textile fabrics are no longer limited to practicality, but more emphasis on the comfort, warmth and environmental performance of fabrics. Flannel is a soft and velvety cotton-wool fabric woven with carded cotton-wool yarn. In China, it generally refers to a coarse-spun cotton-wool fabric with a clip-pattern style woven with mixed-color carded cotton-wool yarn, which is covered with a layer of plump and fine velvet, without revealing the texture, and feels soft and smooth.

[0003] Although traditional flannel fabrics have certain warmth retention properties, there is still room for improvement in terms of skin-friendliness and the durability of the warmth retention effect. Therefore, it is necessary to provide a flannel fabric that is both skin-friendly and long-lastingly warm to meet the market demand for high-quality textiles. Summary of the invention

[0004] In order to improve the long-term thermal insulation performance of flannel fabric, the present application provides a skin-friendly and ultra-warm flannel fabric and a preparation method thereof.

[0005] The present application provides a skin-friendly ultra-warm flannel fabric and a preparation method thereof, which adopts the following technical solutions: In the first aspect, the present application provides a skin-friendly and ultra-warm flannel fabric, which adopts the following technical solution: A skin-friendly and ultra-warm flannel fabric, comprising the following components in percentage by mass: Enzyme modified cotton fiber 60-80% Conductive modified wool fiber 15-30% Microcapsule phase change material modified polyester fiber 5-10%.

[0006] Enzyme-modified cotton fiber is modified to fully remove cotton wax and pectin on the surface of cotton fiber, thereby improving the wettability of cotton fiber; conductive modified wool fiber is modified to improve the conductivity of wool fiber, thereby making the fabric have antistatic properties; microcapsule phase change material has good stability and phase change properties, and can effectively improve the thermal insulation effect of polyester fiber. By blending with enzyme-modified cotton fiber and conductive modified wool fiber, the thermal insulation performance of flannel fabric can be effectively improved. The fabric has good antistatic properties and is comfortable and skin-friendly to wear.

[0007] Preferably, the enzyme-modified cotton fiber is prepared by the following steps: The cotton fibers are immersed in a mixed solution containing sodium hydroxide and a refining agent and heated for pretreatment, and the treated cotton fibers are washed with water and then dried to obtain pretreated cotton fibers; Pectinase is added to Tris-HCl buffer to obtain an enzyme solution, the pretreated cotton fiber is immersed in the enzyme solution, heated and stirred, and heated to boiling after the treatment is completed. After the enzyme is inactivated, the treated cotton fiber is washed with water and then dried to obtain enzyme-modified cotton fiber.

[0008] The pretreatment step first removes cotton wax on the surface of cotton fibers through alkaline conditions and refining agents, so that pectinase can penetrate the fiber cuticle to remove pectin in the subsequent step, thereby better improving the wettability of cotton fibers and further improving the compatibility between fibers.

[0009] Preferably, the raw materials for preparing the conductive modified wool fiber include wool fiber body, composite conductive fiber and dopamine hydrochloride.

[0010] The composite conductive fiber itself has good conductivity. After combining with wool fiber, it forms a conductive pathway, thereby improving the antistatic performance of wool fiber. Dopamine hydrochloride can be polymerized in situ on the surface of wool fiber to generate polydopamine, which can enhance the binding force between the composite conductive fiber and wool fiber. At the same time, its structure can assist electron transmission, thereby further improving the conductive performance of the fiber. Polydopamine has good biocompatibility and certain antibacterial properties, which can improve the skin affinity of the fiber, thereby improving the comfort of the fabric.

[0011] Preferably, the composite conductive fibers include carboxylated carbon nanotubes and polyaniline nanofibers.

[0012] Carboxylated carbon nanotubes have a high aspect ratio and good electrical conductivity, and can form a continuous conductive network; polyaniline nanofibers themselves also have good electrical conductivity, their long chain structure can assist electron transmission, and the conjugated structure helps the delocalization and migration of electrons. The compound of polyaniline nanofibers and carboxylated carbon nanotubes can be tightly combined through π-π interactions, hydrogen bonds and other interaction modes to form a more complex and effective conductive pathway, thereby significantly improving the overall electrical conductivity, and then improving the antistatic properties of the fabric.

[0013] Preferably, the mass ratio of the wool fiber body, the composite conductive fiber and dopamine hydrochloride is 1:(0.1-0.2):0.3.

[0014] The conductive modified wool fiber prepared according to the above mass ratio has good antistatic and antibacterial properties.

[0015] Preferably, the raw materials for preparing the microcapsule phase change material modified polyester fiber include silver-modified phase change microcapsules and polyester fibers.

[0016] Silver-modified phase change microcapsules have good phase change heat storage properties and antibacterial properties, which can effectively improve the warmth retention and antibacterial properties of flannel fabrics, thereby improving wearing comfort.

[0017] Preferably, the raw materials for preparing the silver-modified phase-change microcapsules include phase-change microcapsules and silver modifiers, and the raw materials for preparing the phase-change microcapsules include phase-change materials, cellulose nanocrystals and polydopamine wall materials.

[0018] Cellulose nanocrystals are adsorbed on the surface of microdroplets of phase change materials, so that the phase change materials form a uniformly dispersed emulsion. The polydopamine wall material is further in-situ polymerized on the basis of cellulose nanocrystals through dopamine hydrochloride, and the phase change materials are fully and effectively embedded to form phase change microcapsules, which can improve the stability of the phase change microcapsules, achieve long-term phase change heat storage effect, and improve the thermal insulation performance of flannel fabrics. Cellulose nanocrystals have good biocompatibility, and their nano-scale size and unique structure can interfere with the growth and activity of bacteria, thereby improving the comfort and antibacterial properties of the fabric. The silver modifier attaches silver nano-ions on the surface of the phase change microcapsules, which can improve the antibacterial activity of the phase change microcapsules and effectively inhibit the growth and reproduction of bacteria. At the same time, silver nano-ions have good thermal conductivity and electrical conductivity, can effectively transmit heat and electrons, help the phase change microcapsules effectively absorb external heat, improve heat storage performance and electrical conductivity, thereby improving the thermal insulation performance and antistatic performance of flannel fabrics.

[0019] Preferably, the mass ratio of the phase change material, cellulose nanocrystals and polydopamine wall material is 1:0.8:(1-1.2).

[0020] The phase change microcapsules prepared according to the above mass ratio have good heat storage performance and antibacterial properties.

[0021] Preferably, the raw materials for preparing the skin-friendly and ultra-warm flannel fabric also include dyes and auxiliaries.

[0022] Dyes can give flannel fabrics a variety of colors. Adding auxiliaries during dyeing can improve the softness and comfort of the fabric, thereby improving the skin-friendliness of the fabric.

[0023] In a second aspect, the present application provides a method for preparing a skin-friendly ultra-warm flannel fabric, which adopts the following technical scheme: A method for preparing a skin-friendly ultra-warm flannel fabric, comprising the following steps: Enzyme-modified cotton fibers, conductively modified wool fibers and microcapsule phase change material-modified polyester fibers are impregnated into a compatibilizer solution according to their mass percentages, stirred and mixed, and then blended to obtain blended fibers, which are then woven to obtain grey cloth; the grey cloth is sequentially subjected to combing, perming, pre-setting, dyeing, setting and drying, sanding and curling treatments to obtain skin-friendly and ultra-warm flannel fabrics.

[0024] The flannel fabric prepared according to the above steps has good thermal insulation, antibacterial and antistatic properties.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. Enzyme-modified cotton fiber is modified to fully remove cotton wax and pectin on the surface of cotton fiber, thereby improving the wettability of cotton fiber; conductive modified wool fiber is modified to improve the conductivity of wool fiber, thereby making the fabric have antistatic properties; microcapsule phase change material has good stability and phase change properties, which can effectively improve the thermal insulation effect of polyester fiber. By blending with enzyme-modified cotton fiber and conductive modified wool fiber, the thermal insulation performance of flannel fabric can be effectively improved. The fabric has good antistatic properties and is comfortable and skin-friendly to wear.

[0026] 2. The composite conductive fiber itself has good conductivity. The polyaniline nanofibers and carboxylated carbon nanotubes are compounded and can be tightly combined through π-π interactions, hydrogen bonds and other interaction modes to form a more complex and effective conductive pathway, thereby significantly improving the overall conductive performance; after the composite conductive fiber is combined with the wool fiber, the antistatic performance of the wool fiber is effectively improved; dopamine hydrochloride can be in situ polymerized on the surface of the wool fiber to generate polydopamine, which can enhance the binding force between the composite conductive fiber and the wool fiber, and its structure can assist electron transfer, thereby further improving the conductive performance of the fiber; polydopamine has good biocompatibility and certain antibacterial properties, which can improve the skin-affinity of the fiber, thereby improving the comfort of the fabric.

[0027] 3. Cellulose nanocrystals are adsorbed on the surface of microdroplets of phase change materials, so that the phase change materials form a uniformly dispersed emulsion. The polydopamine wall material is further in-situ polymerized on the basis of cellulose nanocrystals through dopamine hydrochloride, which fully and effectively embeds the phase change material to form phase change microcapsules, which can improve the stability of the phase change microcapsules, achieve long-term phase change heat storage effect, and improve the thermal insulation performance of flannel fabrics; cellulose nanocrystals have good biocompatibility, and their nanoscale size and unique structure can interfere with the growth and activity of bacteria, thereby improving the comfort and antibacterial properties of the fabric; silver modifiers attach silver nano-ions to the surface of phase change microcapsules, which can improve the antibacterial activity of phase change microcapsules and effectively inhibit the growth and reproduction of bacteria. At the same time, silver nano-ions have good thermal conductivity and electrical conductivity, can effectively transmit heat and electrons, help phase change microcapsules effectively absorb external heat, improve heat storage performance and electrical conductivity, thereby improving the thermal insulation performance and antistatic performance of flannel fabrics. DETAILED DESCRIPTION

[0028] The present application discloses a skin-friendly ultra-warm flannel fabric and a preparation method thereof. The raw materials used in the present application can be obtained from commercially available raw materials unless otherwise specified. The present application is further described in detail below in conjunction with the embodiments: Description of raw materials: the refining agent is TF-125D, pectinase (CAS No.: 9032-75-1), dopamine hydrochloride (CAS No.: 62-31-7), carboxylated carbon nanotubes (CAS No.: 308068-56-6), polyaniline nanofibers are purchased from Miyu New Materials (Shanghai) Co., Ltd., paraffin (CAS No.: 8002-74-2), the emulsifier is hexadecyltrimethylammonium bromide (CAS No.: 57-09-0), cellulose nanocrystals are purchased from Nanjing Tianlu Nanotechnology Co., Ltd., the polydopamine wall material is obtained by in-situ polymerization of dopamine hydrochloride, the silver modifier is silver ammonia solution, ascorbic acid (CAS No.: 50-81-7), the compatibilizer is Dow FUSABOND, and the auxiliary agent is a softener purchased from Jiashan Jiangnan Textile Materials Co., Ltd.

[0029] Example 1 Preparation of enzyme-modified cotton fibers The cotton fiber is immersed in a mixed solution of 4% by mass of sodium hydroxide and 2% by mass of a refining agent, with a bath ratio of 1:20, and treated at 100°C for 2 hours. The treated cotton fiber is washed with water and then dried to obtain pretreated cotton fiber.

[0030] Pectinase was added to 0.05 mol / L Tris-HCl buffer at pH 8 to give an enzyme concentration of 300 U / g. (织物) , obtain an enzyme solution, immerse the pretreated cotton fiber into the enzyme solution with a bath ratio of 1:30, and treat it at 50°C with a stirring speed of 150rpm for 1h. After the treatment is completed, heat it to boiling, inactivate the enzyme, wash the treated cotton fiber with water, and then dry it to obtain enzyme-modified cotton fiber.

[0031] Preparation of conductive modified wool fibers The wool fiber was immersed in a conductive modification solution for ultrasonic treatment for 1 hour, with a bath ratio of 1:20. The conductive modification solution included composite conductive fibers and dopamine hydrochloride. The mass ratio of the wool fiber, the composite conductive fiber and dopamine hydrochloride in the system was 1:0.1:0.3. The mass ratio of the carboxylated carbon nanotubes and the polyaniline nanofibers in the composite conductive fibers was 0.5:1. The reaction was stirred at 60°C and 200 rpm for 8 hours. The wool fiber after the reaction was washed with water and then dried to obtain conductive modified wool fiber.

[0032] Preparation of microcapsule phase change material modified polyester fiber: 17.9g paraffin and 3g emulsifier are dispersed in 100mL deionized water, homogenized at 65°C at 5000rpm for 20min to obtain a paraffin emulsion, 14.2g cellulose nanocrystals are added to the paraffin emulsion, and stirred at 200rpm for 1h to obtain a stable paraffin emulsion; 17.9g dopamine hydrochloride is dispersed in 100mL deionized water to obtain a dopamine solution, the stable paraffin emulsion is added to the dopamine solution, and the reaction is stirred at 25°C at 200rpm for 6h, and 5mL of 3% by mass hydrogen peroxide is added during the reaction to obtain a phase change microcapsule dispersion.

[0033] 10g of polyvinyl pyrrolidone and 10mL of 2% silver ammonia solution were mixed to obtain a silver plating solution, and the silver plating solution was added to the microcapsule dispersion solution, and the addition was completed within 2 hours. Then 10mL of 0.24mol / L ascorbic acid solution was added, and the mixture was stirred at 200rpm for 6 hours at 40°C to obtain a phase change microcapsule dispersion solution. The polyester fiber was immersed in the phase change microcapsule dispersion solution, with a bath ratio of 1:20. After immersion for 1 hour, it was rolled and dried to obtain a microcapsule phase change material modified polyester fiber.

[0034] Preparation of skin-friendly and ultra-warm flannel fabric According to the mass percentage, 60% enzyme-modified cotton fiber, 30% conductive modified wool fiber and 10% microcapsule phase change material modified polyester fiber are immersed in a compatibilizer solution with a mass percentage of 5%, with a bath ratio of 1:30, and the mixture is stirred and mixed at a speed of 200 rpm for 30 minutes, and blended to obtain blended fibers, and the blended fibers are woven to obtain grey cloth; the grey cloth is sequentially subjected to combing, perming, pre-setting, dyeing, setting and drying, sanding and curling treatment, and the above dyeing step immerses the grey cloth in a solution containing dyes and auxiliaries for dyeing to obtain skin-friendly and ultra-warm flannel fabric.

[0035] Example 2 Preparation of enzyme-modified cotton fibers The cotton fiber is immersed in a mixed solution of 4% by mass of sodium hydroxide and 2% by mass of a refining agent, with a bath ratio of 1:20, and treated at 100°C for 2 hours. The treated cotton fiber is washed with water and then dried to obtain pretreated cotton fiber.

[0036] Pectinase was added to 0.05 mol / L Tris-HCl buffer at pH 8 to give an enzyme concentration of 300 U / g. (织物), obtain an enzyme solution, immerse the pretreated cotton fiber into the enzyme solution with a bath ratio of 1:30, and treat it at 50°C with a stirring speed of 150rpm for 1h. After the treatment is completed, heat it to boiling, inactivate the enzyme, wash the treated cotton fiber with water, and then dry it to obtain enzyme-modified cotton fiber.

[0037] Preparation of conductive modified wool fibers The wool fiber is immersed in a conductive modification solution for ultrasonic treatment for 1 hour, with a bath ratio of 1:20. The conductive modification solution includes composite conductive fibers and dopamine hydrochloride. The mass ratio of the wool fiber, the composite conductive fiber and dopamine hydrochloride in the system is 1:0.2:0.3. The mass ratio of the carboxylated carbon nanotubes and the polyaniline nanofibers in the composite conductive fibers is 0.5:1. The reaction is stirred at 60°C and 200 rpm for 8 hours. The wool fiber after the reaction is washed with water and then dried to obtain conductive modified wool fiber.

[0038] Preparation of microcapsule phase change material modified polyester fiber: 16.7g paraffin and 3g emulsifier are dispersed in 100mL deionized water, homogenized at 65°C at 5000rpm for 20min to obtain a paraffin emulsion, 13.3g cellulose nanocrystals are added to the paraffin emulsion, and stirred at 200rpm for 1h to obtain a stable paraffin emulsion; 20g dopamine hydrochloride is dispersed in 100mL deionized water to obtain a dopamine solution, the stable paraffin emulsion is added to the dopamine solution, and the reaction is stirred at 25°C at 200rpm for 6h, and 5mL of 3% by mass hydrogen peroxide is added during the reaction to obtain a phase change microcapsule dispersion.

[0039] 10g of polyvinyl pyrrolidone and 10mL of 2% silver ammonia solution were mixed to obtain a silver plating solution, and the silver plating solution was added to the microcapsule dispersion solution, and the addition was completed within 2 hours. Then 10mL of 0.24mol / L ascorbic acid solution was added, and the mixture was stirred at 200rpm for 6 hours at 40°C to obtain a phase change microcapsule dispersion solution. The polyester fiber was immersed in the phase change microcapsule dispersion solution, with a bath ratio of 1:20. After immersion for 1 hour, it was rolled and dried to obtain a microcapsule phase change material modified polyester fiber.

[0040] Preparation of skin-friendly and ultra-warm flannel fabric According to the mass percentage, 80% enzyme-modified cotton fiber, 15% conductive modified wool fiber and 5% microcapsule phase change material modified polyester fiber are immersed in a compatibilizer solution with a mass percentage of 5%, with a bath ratio of 1:30, and the mixture is stirred and mixed at a speed of 200 rpm for 30 minutes, and blended to obtain blended fibers, and the blended fibers are woven to obtain grey cloth; the grey cloth is sequentially subjected to combing, perming, pre-setting, dyeing, setting and drying, sanding and curling treatment, and the above dyeing step immerses the grey cloth in a solution containing dyes and auxiliaries for dyeing to obtain skin-friendly and ultra-warm flannel fabric.

[0041] Example 3 Preparation of enzyme-modified cotton fibers The cotton fiber is immersed in a mixed solution of 4% by mass of sodium hydroxide and 2% by mass of a refining agent, with a bath ratio of 1:20, and treated at 100°C for 2 hours. The treated cotton fiber is washed with water and then dried to obtain pretreated cotton fiber.

[0042] Pectinase was added to 0.05 mol / L Tris-HCl buffer at pH 8 to give an enzyme concentration of 300 U / g. (织物) , obtain an enzyme solution, immerse the pretreated cotton fiber into the enzyme solution with a bath ratio of 1:30, and treat it at 50°C with a stirring speed of 150rpm for 1h. After the treatment is completed, heat it to boiling, inactivate the enzyme, wash the treated cotton fiber with water, and then dry it to obtain enzyme-modified cotton fiber.

[0043] Preparation of conductive modified wool fibers The wool fiber was immersed in a conductive modification solution for ultrasonic treatment for 1 hour, with a bath ratio of 1:20. The conductive modification solution included composite conductive fibers and dopamine hydrochloride. The mass ratio of the wool fiber, the composite conductive fiber and dopamine hydrochloride in the system was 1:0.15:0.3. The mass ratio of the carboxylated carbon nanotubes and the polyaniline nanofibers in the composite conductive fibers was 0.5:1. The reaction was stirred at 60°C and 200 rpm for 8 hours. The wool fiber after the reaction was washed with water and then dried to obtain conductive modified wool fiber.

[0044] Preparation of microcapsule phase change material modified polyester fiber: 17.2g paraffin and 3g emulsifier are dispersed in 100mL deionized water, homogenized at 65°C at 5000rpm for 20min to obtain a paraffin emulsion, 13.8g cellulose nanocrystals are added to the paraffin emulsion, and stirred at 200rpm for 1h to obtain a stable paraffin emulsion; 19g dopamine hydrochloride is dispersed in 100mL deionized water to obtain a dopamine solution, the stable paraffin emulsion is added to the dopamine solution, and the reaction is stirred at 25°C at 200rpm for 6h. During the reaction, 5mL of 3% by mass hydrogen peroxide is added to obtain a phase change microcapsule dispersion.

[0045] 10g of polyvinyl pyrrolidone and 10mL of 2% silver ammonia solution were mixed to obtain a silver plating solution, and the silver plating solution was added to the microcapsule dispersion solution, and the addition was completed within 2 hours. Then 10mL of 0.24mol / L ascorbic acid solution was added, and the mixture was stirred at 200rpm for 6 hours at 40°C to obtain a phase change microcapsule dispersion solution. The polyester fiber was immersed in the phase change microcapsule dispersion solution, with a bath ratio of 1:20. After immersion for 1 hour, it was rolled and dried to obtain a microcapsule phase change material modified polyester fiber.

[0046] Preparation of skin-friendly and ultra-warm flannel fabric According to the mass percentage, 70% enzyme-modified cotton fiber, 22.5% conductive modified wool fiber and 7.5% microcapsule phase change material modified polyester fiber are immersed in a compatibilizer solution with a mass percentage of 5%, with a bath ratio of 1:30, and the mixture is stirred and mixed at a speed of 200 rpm for 30 minutes, and blended to obtain blended fibers, and the blended fibers are woven to obtain grey cloth; the grey cloth is sequentially subjected to combing, perming, pre-setting, dyeing, setting and drying, sanding and curling treatment, and the above dyeing step immerses the grey cloth in a solution containing dyes and auxiliaries for dyeing to obtain skin-friendly and ultra-warm flannel fabric.

[0047] Example 4 Example 4 is based on Example 3. The only difference between Example 4 and Example 3 is that no pretreatment is performed when preparing the enzyme-modified cotton fiber in Example 4.

[0048] Example 5 Example 5 is based on Example 3. The only difference between Example 5 and Example 3 is that in Example 5, the composite conductive fibers are replaced by polyaniline nanofibers.

[0049] Example 6 Example 6 is based on Example 3. The only difference between Example 6 and Example 3 is that in Example 6, the mass ratio of wool fiber, composite conductive fiber and dopamine hydrochloride is 1:0.05:0.3.

[0050] Example 7 Example 7 is based on Example 3, and the only difference between Example 7 and Example 3 is that in Example 7, the mass ratio of wool fiber, composite conductive fiber and dopamine hydrochloride is 1:0.25:0.3.

[0051] Example 8 Example 8 is based on Example 3. The only difference between Example 8 and Example 3 is that in Example 8, the amount of phase change material used is 19.2 g, the amount of cellulose nanocrystals used is 15.4 g, and the amount of polydopamine wall material used is 15.4 g.

[0052] Example 9 Example 9 is based on Example 3. The only difference between Example 9 and Example 3 is that in Example 9, the amount of phase change material used is 15.6 g, the amount of cellulose nanocrystals used is 12.5 g, and the amount of polydopamine wall material used is 21.9 g.

[0053] Example 10 Example 10 is based on Example 3. The only difference between Example 10 and Example 3 is that in Example 10, when preparing microcapsule phase change material-modified polyester fiber, silver-modified phase change microcapsules are replaced with phase change microcapsules.

[0054] Embodiment 11 Example 11 is based on Example 3. The only difference between Example 11 and Example 3 is that cellulose nanocrystals are not added when preparing silver-modified phase change microcapsules in Example 11.

[0055] Comparative Example 1 Comparative Example 1 is based on Example 3, and the only difference between Comparative Example 1 and Example 3 is that in Comparative Example 1, the enzyme-modified cotton fiber is replaced by cotton fiber.

[0056] Comparative Example 2 Comparative Example 2 is based on Example 3, and the only difference between Comparative Example 2 and Example 3 is that in Comparative Example 2, the conductive modified wool fiber is replaced by wool fiber.

[0057] Comparative Example 3 Comparative Example 3 is based on Example 3, and the only difference between Comparative Example 3 and Example 3 is that in Comparative Example 3, the microcapsule phase change material modified polyester fiber is replaced with polyester fiber.

[0058] Performance testing (1) GB / T18319-2001 Test method for infrared heat storage and warmth retention of textiles was used as the standard. The infrared radiation heating rate was tested on the sample and the sample after washing 30 times. Each sample was tested three times and the average value was taken after measurement. The results are recorded in Table 1.

[0059] (2) Select "GB / T20944.2-2007 Evaluation of antibacterial properties of textiles Part 2: Absorption method" as the standard, cut 6 samples of 0.4g, conduct antibacterial performance test, incubate and elute, calculate the inhibition rate and fill in the measurement results in Table 1.

[0060] (3) GB / T12703-1991 Textile Electrostatic Test Method was selected as the standard, and the C method charge surface density method was used for testing. Two pieces were randomly sampled from the warp and weft directions, and the charge surface density was calculated. Each sample was tested three times, and the average of the three tests was the measured value of the sample. The measured values ​​of the four samples were averaged, and the results were recorded in Table 1.

[0061] Table 1 Test results of thermal insulation, antibacterial and antistatic properties of flannel fabric As shown in Table 1, the heating rate before washing of Examples 1-3 is greater than 0.721°C / s, the heating rate after washing is greater than 0.684°C / s, the antibacterial rate of Escherichia coli is greater than 99.3%, the antibacterial rate of Staphylococcus aureus is greater than 99.2%, the antibacterial rate of Candida albicans is greater than 99.5%, and the charge surface density is less than 1.3 μC / m 2 , thus it can be seen that the flannel fabric prepared in the present application has good warmth retention, antibacterial and antistatic properties.

[0062] As can be seen from Table 1, the only difference between Example 4 and Example 3 is that: in Example 4, no pretreatment is performed when preparing the enzyme-modified cotton fiber, and compared with Example 3, Example 4 has reduced thermal insulation performance, antibacterial performance and antistatic performance; this is because no pretreatment is performed when preparing the enzyme-modified cotton fiber, the cotton wax on the surface of the cotton fiber will affect the subsequent pectinase modification treatment, the wettability of the cotton fiber will decrease, and the compatibility of the cotton fiber with other fibers will also decrease, which will further affect the stability of the flannel fabric, thereby reducing the thermal insulation performance, antibacterial performance and antistatic performance.

[0063] As can be seen from Table 1, the only difference between Examples 5, 6, and 7 and Example 3 is that in Example 5, the composite conductive fiber is replaced with polyaniline nanofibers, the mass ratio of wool fiber, composite conductive fiber and dopamine hydrochloride in Example 6 is 1:0.05:0.3, and the mass ratio of wool fiber, composite conductive fiber and dopamine hydrochloride in Example 7 is 1:0.25:0.3. Compared with Example 3, the thermal insulation performance, antibacterial performance and antistatic performance of Examples 5, 6 and 7 are all reduced; this is because if carboxylated carbon nanotubes are not added, the conductive performance and stability of the conductive modified wool fiber are reduced, thereby reducing the antistatic performance. If the ratio of wool fiber, composite conductive fiber and dopamine hydrochloride is not within the specified range, too much or too little composite conductive fiber will affect the adhesion effect and conductive performance, and the wool fiber stability is reduced, thereby reducing the thermal insulation performance, antibacterial performance and antistatic performance of the flannel fabric.

[0064] As can be seen from Table 1, the only difference between Examples 8 and 9 and Example 3 is that the mass ratio of the phase change material, cellulose nanocrystal and polydopamine wall material in Example 8 is 1:0.8:0.8, and the mass ratio of the phase change material, cellulose nanocrystal and polydopamine wall material in Example 9 is 1:0.8:1.4. Compared with Example 3, the thermal insulation performance, antibacterial performance and antistatic performance of Examples 8 and 9 are all reduced; this is because the mass ratio of the phase change material, cellulose nanocrystal and polydopamine wall material is not within the specified range, too much or too little polydopamine wall material will affect the stability and thermal conductivity of the phase change microcapsules, and thus the stability of the microcapsule phase change material modified polyester fiber is reduced, thereby reducing the thermal insulation performance, antibacterial performance and antistatic performance.

[0065] As can be seen from Table 1, the only difference between Examples 10 and 11 and Example 3 is that: in Example 10, the silver-modified phase change microcapsules are replaced with phase change microcapsules when preparing the microcapsule phase change material-modified polyester fiber, and cellulose nanocrystals are not added when preparing the silver-modified phase change microcapsules in Example 11. Compared with Example 3, the thermal insulation performance, antibacterial performance and antistatic performance of Examples 10 and 11 are all reduced; this is because if the silver-modified phase change microcapsules are replaced with phase change microcapsules, the thermal conductivity, electrical conductivity and antibacterial performance of the phase change microcapsules are all reduced due to the lack of modification treatment with silver nano-ions; if cellulose nanocrystals are not added, the dispersibility and uniformity of the phase change material are reduced, the embedding effect is deteriorated, and the stability of the phase change microcapsules is reduced, thereby reducing the thermal insulation performance, antibacterial performance and antistatic performance.

[0066] It can be seen from Table 1 that the only difference between Comparative Example 1 and Example 3 is that: Comparative Example 1 replaces the enzyme-modified cotton fiber with cotton fiber. Compared with Example 3, Comparative Example 1 has significantly reduced thermal insulation performance, antibacterial performance and antistatic performance; this is because the cotton fiber lacks modification treatment, the wettability deteriorates, the compatibility between the fibers decreases, and the stability of the fabric decreases, thereby significantly reducing the thermal insulation performance, antibacterial performance and antistatic performance.

[0067] It can be seen from Table 1 that the only difference between Comparative Example 2 and Example 3 is that Comparative Example 2 replaces the conductive modified wool fiber with wool fiber. Compared with Example 3, the thermal insulation performance, antibacterial performance and antistatic performance of Comparative Example 2 are significantly reduced; this is because the conductive modified wool fiber is replaced with wool fiber, and the conductive modification treatment is lacking, the conductive performance of the wool fiber is reduced, the charge is more easily accumulated on the surface of the fabric, and the in-situ polymerization of polydopamine is lacking, the compatibility is reduced, and the stability of the flannel fabric is reduced, so the thermal insulation performance, antibacterial performance and antistatic performance are significantly reduced.

[0068] It can be seen from Table 1 that the only difference between Comparative Example 3 and Example 3 is that: Comparative Example 3 replaces the microcapsule phase change material modified polyester fiber with polyester fiber. Compared with Example 3, the thermal insulation performance, antibacterial performance and antistatic performance of Comparative Example 3 are significantly reduced; this is because the microcapsule phase change material modified polyester fiber is replaced with polyester fiber, and the modification treatment of silver-modified phase change microcapsules is lacking, and the long-term thermal insulation performance, antibacterial performance and antistatic performance of the polyester fiber are greatly reduced, thereby significantly reducing the thermal insulation performance, antibacterial performance and antistatic performance of the flannel fabric.

[0069] This specific embodiment is only an explanation of the present application, and it is not a limitation of the present application. Through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of ​​the present application. The technical scope of the present application is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A skin-friendly and ultra-warm flannel fabric, characterized in that: Includes the following components in percentage by mass: Enzyme modified cotton fiber 60-80% Conductive modified wool fiber 15-30% Microcapsule phase change material modified polyester fiber 5-10%.

2. The skin-friendly and ultra-warm flannel fabric according to claim 1, characterized in that: The enzyme-modified cotton fiber is prepared by the following steps: The cotton fibers are immersed in a mixed solution containing sodium hydroxide and a refining agent and heated for pretreatment, and the treated cotton fibers are washed with water and then dried to obtain pretreated cotton fibers; Pectinase is added to Tris-HCl buffer to obtain an enzyme solution, the pretreated cotton fiber is immersed in the enzyme solution, heated and stirred, and heated to boiling after the treatment is completed. After the enzyme is inactivated, the treated cotton fiber is washed with water and then dried to obtain enzyme-modified cotton fiber.

3. The skin-friendly and ultra-warm flannel fabric according to claim 1, characterized in that: The raw materials for preparing the conductive modified wool fiber include wool fiber body, composite conductive fiber and dopamine hydrochloride.

4. The skin-friendly and ultra-warm flannel fabric according to claim 3, characterized in that: The composite conductive fiber comprises carboxylated carbon nanotubes and polyaniline nanofibers.

5. The skin-friendly and ultra-warm flannel fabric according to claim 4, characterized in that: The mass ratio of the wool fiber body, the composite conductive fiber and dopamine hydrochloride is 1:(0.1-0.2):0.

3.

6. The skin-friendly and ultra-warm flannel fabric according to claim 1, characterized in that: The raw materials for preparing the microcapsule phase change material modified polyester fiber include silver modified phase change microcapsules and polyester fiber.

7. The skin-friendly and ultra-warm flannel fabric according to claim 6, characterized in that: The raw materials for preparing the silver-modified phase-change microcapsules include phase-change microcapsules and silver modifiers, and the raw materials for preparing the phase-change microcapsules include phase-change materials, cellulose nanocrystals and polydopamine wall materials.

8. The skin-friendly and ultra-warm flannel fabric according to claim 7, characterized in that: The mass ratio of the phase change material, the cellulose nanocrystal and the polydopamine wall material is 1:0.8:(1-1.2).

9. The skin-friendly and ultra-warm flannel fabric according to claim 1, characterized in that: The raw materials for preparing the skin-friendly and ultra-warm flannel fabric also include dyes and auxiliaries.

10. A method for preparing the skin-friendly ultra-warm flannel fabric as claimed in claim 1, characterized in that: The steps include: Enzyme-modified cotton fibers, conductively modified wool fibers and microcapsule phase change material-modified polyester fibers are impregnated into a compatibilizer solution according to their mass percentages, stirred and mixed, and then blended to obtain blended fibers, which are then woven to obtain grey cloth; the grey cloth is sequentially subjected to combing, perming, pre-setting, dyeing, setting and drying, sanding and curling treatments to obtain skin-friendly and ultra-warm flannel fabrics.

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