Temperature-adjusting antibacterial knitted fabric and preparation method thereof

Abstract

The invention discloses a temperature-adjusting antibacterial knitted fabric and a preparation method thereof, and belongs to the technical field of functional clothing, Ti3AlC2 powder is soaked in an HF solution, stirring reaction is performed, and Ti3C2Tx MXene is formed. And purifying and stripping by adopting methods such as centrifugal cleaning and ultrasonic treatment to obtain the high-quality MXene micron sheet. The MXene-PVA material is prepared by grafting polyvinyl alcohol with good affinity and centrifuging. An emulsion-solvent evaporation method is utilized to prepare the temperature-adjusting antibacterial microcapsule which takes polypyrrole as a shell material and lauric acid as a core material. The MXene-PVA material and the temperature-adjusting antibacterial microcapsules are compounded through mechanical stirring and electrostatic adsorption, the obtained temperature-adjusting antibacterial functional MXene material is mixed with a PVA adhesive, and the temperature-adjusting antibacterial finishing agent for knitted garments is prepared. The finishing agent is finished on knitted garments through an impregnation method, so that the knitted garments are endowed with excellent temperature adjusting and antibacterial properties.

Description

Technical Field

[0001] The invention relates to the technical field of functional clothing, and in particular to a temperature-regulating and antibacterial knitted fabric and a preparation method thereof. Background Art

[0002] As close-fitting clothing, the comfort and functionality of knitted clothing have always been the focus of consumers. Traditional knitted clothing does have certain advantages in basic properties such as heat preservation and moisture absorption, but its antibacterial and active temperature regulation functions are relatively weak for the increasingly prominent health and environmental protection needs. In recent years, with people's favor for healthy, comfortable and environmentally friendly textiles, the development of functional clothing with dual characteristics of autonomous temperature and humidity regulation and antibacterial has become a research hotspot in the textile industry. Behind this demand is people's desire for a more intelligent and personalized clothing experience. Single passive heat preservation or moisture absorption can no longer meet the modern people's requirements for all-round comfort of clothing. On the contrary, smart clothing that can intelligently sense environmental changes and actively adjust temperature will surely become the mainstream direction of future development. As an emerging two-dimensional micron material, MXene has shown broad application prospects in this field with its unique properties such as excellent thermal conductivity and antibacterial properties. The combination of MXene with other functional materials is expected to prepare a functional finishing agent for knitted clothing with excellent performance, realizing intelligent temperature regulation and antibacterial protection of knitted clothing.

[0003] The present invention is aimed at the above-mentioned market demand, and makes full use of the high thermal conductivity of MXene, the excellent antibacterial property of PPy, and the temperature regulating function of lauric acid phase change material to develop an intelligent knitted garment temperature regulating and antibacterial finishing agent with excellent performance. The finishing agent is compounded onto sports knitted garments by an impregnation method to realize a sports knitted garment with temperature regulating and antibacterial functionalities, which can significantly improve the active temperature regulating and antibacterial functions of knitted garments, and the preparation process is simple, which will occupy an important position in the future intelligent textile market. Summary of the invention

[0004] The purpose of the present application is to provide a temperature-regulating and antibacterial knitted fabric and a preparation method thereof, which makes full use of the high thermal conductivity of MXene, the excellent antibacterial property of PPy, and the temperature-regulating function of lauric acid phase change material, and develops an intelligent knitted garment temperature-regulating and antibacterial finishing agent with excellent performance. The finishing agent is compounded onto sports knitted garments by an impregnation method to realize a temperature-regulating and antibacterial functional sports knitted garment, which can significantly improve the active temperature-regulating and antibacterial functions of knitted garments.

[0005] The present invention provides a method for preparing a temperature-regulating antibacterial knitted fabric, comprising the following steps: S1, adding Ti3AlC2 powder into hydrofluoric acid solution and stirring the reaction at room temperature to form Ti3C2TxMXene with a two-dimensional layered structure.

[0006] S2, purifying and exfoliating the Ti3C2TxMXene obtained in step S1 by centrifugal washing and ultrasonic treatment to obtain MXene microsheets; increasing the active sites on the surface of the MXene microsheets by grafting polyvinyl alcohol, preparing MXene-PVA material by centrifugation, washing with deionized water to remove impurities, and drying the MXene-PVA material to obtain modified MXene powder; S3, using the emulsification-solvent evaporation method, polypyrrole as the shell material and lauric acid as the core material, to prepare the temperature-regulating antibacterial microcapsules; S4, compounding the modified MXene powder and the temperature-regulating antibacterial microcapsules by mechanical stirring and electrostatic adsorption to obtain a temperature-regulating antibacterial functional MXene material; then mixing the obtained temperature-regulating antibacterial functional MXene material with a PVA adhesive to prepare a temperature-regulating antibacterial finishing agent for knitted garments; S5, applying the temperature regulating and antibacterial finishing agent to the knitted garment by an impregnation method to obtain the sports knitted garment with temperature regulating and antibacterial properties.

[0007] Preferably, Ti3AlC2 powder is used as a MXene precursor raw material with a purity of ≥98%, lauric acid is used as a phase change material with a phase change temperature range of 30~40°C, a phase change enthalpy of ≥150J / g, and a molecular weight of the PVA adhesive of 10000~20000.

[0008] Preferably, in step S1, the concentration of the hydrofluoric acid solution is 48-52%, the reaction temperature is controlled at 23-27° C., and the reaction time is 2-4 h.

[0009] Preferably, in step S2, the centrifugal washing step is: centrifuging the Ti3C2TxMXene obtained in step S1 in a high-speed centrifuge at 8000-10000 r / min for 20-30 min, and washing with deionized water for 3-5 times; the ultrasonic treatment step is: ultrasonicating the washed MXene suspension at 200 W for 30 min-60 min; increasing the active sites on the surface of the MXene microsheets by grafting polyvinyl alcohol, centrifuging to prepare MXene-PVA material, and washing with deionized water to remove impurities. The specific steps of drying the e-PVA material to obtain the modified MXene powder are as follows: mixing the purified MXene dispersion and the PVA aqueous solution in a mass ratio of 1:1-1:2, reacting at 40-60°C for 2-4 hours, and after the reaction, separating the modified MXene-PVA material by centrifugation at a speed of 4000r / min-6000r / min, washing with deionized water for 3-5 times to remove impurities, and drying the MXene-PVA material in a vacuum drying oven at 60-80°C for 6-8 hours to obtain the modified MXene powder.

[0010] Preferably, in step S3, the emulsification-solvent evaporation method is adopted, polypyrrole is used as the shell material, and lauric acid is used as the core material, and the specific steps of preparing the temperature-regulating antibacterial microcapsules are as follows: 0.5-1.5 g of lauric acid is dissolved in 10-20 ml of dichloromethane organic solvent to form an oil phase, 0.25-0.75 g of PPy is dissolved in the water phase to form an oil-water emulsion, and the temperature-regulating antibacterial microcapsules are separated by a centrifugal speed of 4000-5000 r / min, and washed with deionized water for 3-5 times, and the collected temperature-regulating antibacterial microcapsules are placed in a vacuum drying oven at 50-70°C and dried for 2-4 hours.

[0011] Preferably, in step S4, the modified MXene powder and the temperature-regulating antibacterial microcapsules are mechanically stirred in a mass ratio of 2:0.5 to 2:1, and reacted at 30 to 40°C for 40 to 50 minutes to obtain a temperature-regulating antibacterial functional MXene material, and the temperature-regulating antibacterial functional MXene material and the PVA adhesive are mixed in a mass ratio of 6:4 to 7:3 and stirred to obtain a temperature-regulating antibacterial finishing agent for knitted garments.

[0012] Preferably, in step S5, the specific steps of applying the temperature regulating antibacterial finishing agent to the knitted garment by the immersion method are: immersing the knitted garment in the temperature regulating antibacterial solution at 40-50° C. for 20-30 min, and drying the dehydrated knitted garment in an oven at 80-100° C. for 40-50 min.

[0013] Preferably, when the finishing agent is impregnated, the amount of the temperature regulating antibacterial finishing agent is 5-7% of the weight of the knitted garment, and the bath ratio of the finishing liquid is 1:10-20.

[0014] The present application provides a temperature-regulating antibacterial knitted fabric prepared according to the above-mentioned method for preparing the temperature-regulating antibacterial knitted fabric.

[0015] Therefore, the present application provides a temperature-regulating antibacterial knitted fabric and a preparation method thereof, which have the following beneficial effects: 1) The present invention uses MXene two-dimensional micron material with high thermal conductivity as the main component of the finishing agent. MXene has extremely high thermal conductivity and can effectively enhance the thermal conductivity of knitted clothing. This feature enables knitted clothing to quickly sense changes in human body heat and actively regulate heat to improve wearing comfort. Lauric acid phase change material as a microcapsule core material can absorb or release a large amount of latent heat within a certain temperature range to achieve active temperature regulation of knitted clothing. When the human body temperature rises, the phase change material absorbs heat to change from solid to liquid, preventing the microenvironment temperature between human skin and fabric from rising; when the human body temperature drops, the phase change material releases heat to change from liquid to solid, preventing the microenvironment temperature between human skin and fabric from dropping. Thereby effectively adjusting the microenvironment temperature of knitted clothing and enhancing its autonomous temperature regulation performance.

[0016] 2) The present invention uses polypyrrole as a microcapsule shell material and as an antibacterial component, which has excellent antibacterial activity and can effectively inhibit the growth and reproduction of common bacteria such as Escherichia coli and Staphylococcus aureus on the surface of knitted garments. This not only enhances the hygiene and cleanliness of knitted garments, but also helps prevent the occurrence of bacterial skin diseases and improve the health and safety of wearers. In the present invention, polyvinyl alcohol plays a role in modifying the surface of MXene, increasing the electrostatic attraction with the polypyrrole microcapsule shell material. In the subsequent steps, PVA is used as an adhesive to prepare a temperature-regulating antibacterial finishing agent for knitted garments. The adhesive can form a strong bond with the fiber material. This ensures that the finishing effect can be maintained on the surface of the knitted garment for a long time and will not fall off easily. Even after repeated washing, the temperature-regulating, humidity-regulating and antibacterial properties of knitted garments can be reliably maintained.

[0017] 3) The thermostatic antibacterial functional sports knitted clothing prepared by the invention was tested and found that the phase change temperature range of the clothing was 30-40°C, and the phase change enthalpy was 150-180J / g; after washing the clothing 50 times, the phase change temperature range of the clothing was still 30-40°C, and the phase change enthalpy was still 150-180J / g, which had good thermostatic performance. The antibacterial rates of the clothing against Staphylococcus aureus, Escherichia coli and Candida albicans reached 98-99.5%, 96-98% and 95-97% respectively; after washing 50 times, the antibacterial rates of the clothing against Staphylococcus aureus, Escherichia coli and Candida albicans reached 94-96%, 93-95% and 91-93% respectively, achieving good antibacterial properties.

[0018] 4) The preparation method adopted by the present invention is relatively simple, mainly involving the process steps of preparing MXene by chemical etching, preparing microcapsules by emulsion polymerization, grafting and modifying MXene, and impregnation of knitted garments. These processes are relatively mature and can be directly applied to the finishing of knitted garments, which is conducive to large-scale industrial production. The components of the finishing agent, such as MXene, PPy, PVA, etc., do not contain toxic and harmful substances. This helps to realize the manufacture of green knitwear and meet consumers' demand for healthy and comfortable textile and clothing products. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further illustrated by the following embodiments.

[0020] Example 1 A method for preparing temperature-regulating and antibacterial functional sports knitted clothing comprises the following steps: S1, 10g Ti3AlC2 powder was added to a 50% hydrofluoric acid (HF) solution and stirred at 25°C for 3h to form a Ti3C2T2O3 with a two-dimensional layered structure. xMXene.

[0021] S2, the reaction product was centrifuged in a high-speed centrifuge at 9000r / min for 25min, and washed repeatedly with deionized water 4 times to remove surface impurities. The washed MXene suspension was ultrasonicated at 200W power for 45min to effectively peel and disperse the MXene flakes, and the purified MXene dispersion and PVA aqueous solution were mixed at a mass ratio of 1:1.5 and reacted at 50°C for 3h. After the reaction, the modified MXene-PVA material was separated by a centrifugal speed of 5000r / min, and the impurities were repeatedly washed 4 times with deionized water. The MXene-PVA material was placed in a vacuum drying oven at 70°C and dried for 7h to obtain modified MXene powder.

[0022] S3, using the emulsification-solvent evaporation method, 1g of lauric acid was dissolved in 15mL of dichloromethane organic solvent to form an oil phase. 0.5g of PPy was dissolved in the water phase to form an oil-water emulsion, and the thermostatic antibacterial microcapsules were separated by centrifugation at a speed of 4500r / min, and washed with deionized water 4 times. The collected microcapsules were placed in a vacuum drying oven at 60°C and dried for 3h to obtain dry thermostatic antibacterial microcapsules.

[0023] S4, mechanically stirring the modified MXene powder and the temperature-regulating antibacterial microcapsules in a mass ratio of 2:0.75, reacting at 35°C for 45 minutes, to obtain a temperature-regulating antibacterial functional MXene material. The temperature-regulating antibacterial functional MXene material and the PVA adhesive in a mass ratio of 6.5:3.5 were mixed and stirred to obtain a temperature-regulating antibacterial finishing agent for knitted garments.

[0024] S5, when the finishing agent is impregnated, the finishing agent is used in an amount of 5% of the weight of the knitted garment, the bath ratio of the finishing solution is 1:10, and the knitted garment is immersed in the solution and immersed for 20 minutes at 40°C. The dehydrated knitted garment is placed in an oven at 80°C for 40 minutes to fully solidify the finishing agent on the fabric surface, thereby obtaining a thermostatic and antibacterial functional knitted garment.

[0025] The phase change temperature range of the garment produced by this process is 30~40°C, and the phase change enthalpy is 150J / g; after washing the garment 50 times, the phase change temperature range of the garment is still 30~40°C, and the phase change enthalpy is still 150 / g, which has good temperature regulation performance. The antibacterial rates of this garment against Staphylococcus aureus, Escherichia coli and Candida albicans are 98%, 96% and 95% respectively; after washing 50 times, the antibacterial rates of this garment against Staphylococcus aureus, Escherichia coli and Candida albicans are 94%, 93% and 91% respectively, achieving good antibacterial properties.

[0026] Example 2 A method for preparing modified MXene powder comprises the following steps: S1, 8g Ti3AlC2 powder was added to a 48% hydrofluoric acid solution and stirred at room temperature of 23°C for 2h to form a Ti3C2T2O3 with a two-dimensional layered structure. x MXene.

[0027] S2, the reaction product was centrifuged in a high-speed centrifuge at 8000r / min for 20min, and the surface impurities were removed by repeated washing with deionized water three times. The washed MXene suspension was ultrasonicated at 200W for 30min to effectively peel and disperse the MXene flakes, and the purified MXene dispersion and PVA aqueous solution were mixed in a mass ratio of 1:1 and reacted at 40°C for 2h. After the reaction, the modified MXene-PVA material was separated by centrifugation at a speed of 4000r / min, and the impurities were removed by repeated washing with deionized water three times. The MXene-PVA material was placed in a vacuum drying oven at 60°C and dried for 6h to obtain the modified MXene powder.

[0028] S3, using the emulsification-solvent evaporation method, 0.5g of lauric acid was dissolved in 10mL of dichloromethane organic solvent to form an oil phase. 0.25g of PPy was dissolved in the water phase to form an oil-water emulsion, and the thermostatic antibacterial microcapsules were separated by centrifugation at a speed of 4000r / min, and washed with deionized water for 3 times. The collected microcapsules were placed in a vacuum drying oven at 50°C and dried for 2h to obtain dry thermostatic antibacterial microcapsules.

[0029] S4, mechanically stirring the modified MXene powder and the temperature-regulating antibacterial microcapsules in a mass ratio of 2:0.5, reacting at 30°C for 40 minutes, to obtain a temperature-regulating antibacterial functional MXene material. The temperature-regulating antibacterial functional MXene material and the PVA adhesive are mixed in a mass ratio of 6:4, and stirred to obtain a temperature-regulating antibacterial finishing agent for knitted garments.

[0030] S5, when the finishing agent is impregnated, the finishing agent is used in an amount of 6% of the weight of the knitted garment, the bath ratio of the finishing solution is 1:15, and the knitted garment is immersed in the solution and immersed for 25 minutes at 45°C. The dehydrated knitted garment is placed in an oven at 90°C for 45 minutes to fully solidify the finishing agent on the fabric surface, thereby obtaining a thermostatic and antibacterial functional knitted garment.

[0031] The phase change temperature range of the garment produced by this process is 30~40°C, and the phase change enthalpy is 165J / g; after washing the garment 50 times, the phase change temperature range of the garment is still 30~40°C, and the phase change enthalpy is still 165J / g, which has good temperature regulation performance. The antibacterial rates of the garment against Staphylococcus aureus, Escherichia coli and Candida albicans are 98.8%, 97% and 96% respectively; after washing 50 times, the antibacterial rates of the garment against Staphylococcus aureus, Escherichia coli and Candida albicans are 95%, 94% and 92% respectively, achieving good antibacterial properties.

[0032] Example 3 A method for preparing modified MXene powder comprises the following steps: S1, 12g Ti3AlC2 powder was added to a 52% hydrofluoric acid solution and stirred at 27°C for 4h to form a Ti3C2T2O3 with a two-dimensional layered structure. x MXene.

[0033] S2, the reaction product was centrifuged in a high-speed centrifuge at 10000r / min for 30min, and washed repeatedly with deionized water 5 times to remove surface impurities. The washed MXene suspension was ultrasonicated at 200W for 60min to effectively peel and disperse the MXene flakes, and the purified MXene dispersion and PVA aqueous solution were mixed in a mass ratio of 1:2 and reacted at 60°C for 4h. After the reaction, the modified MXene-PVA material was separated by centrifugation at a speed of 6000r / min, and washed repeatedly with deionized water 5 times to remove impurities. The MXene-PVA material was placed in a vacuum drying oven at 80°C and dried for 8h to obtain a modified MXene powder.

[0034] S3, using the emulsification-solvent evaporation method, 1.5g of lauric acid was dissolved in 20mL of dichloromethane organic solvent to form an oil phase. 0.75g of PPy was dissolved in the water phase to form an oil-water emulsion, and the thermostatic antibacterial microcapsules were separated by centrifugation at a speed of 5000r / min, and washed with deionized water 5 times. The collected microcapsules were placed in a vacuum drying oven at 70°C and dried for 4h to obtain dry thermostatic antibacterial microcapsules.

[0035] S4, mechanically stirring the modified MXene powder and the temperature-regulating antibacterial microcapsules in a mass ratio of 2:1, reacting at 40°C for 50 minutes, to obtain a temperature-regulating antibacterial functional MXene material. The temperature-regulating antibacterial functional MXene material and the PVA adhesive are mixed in a mass ratio of 7:3, and stirred to obtain a temperature-regulating antibacterial finishing agent for knitted garments.

[0036] S5, when the finishing agent is impregnated, the finishing agent is used in an amount of 7% of the weight of the knitted garment, the bath ratio of the finishing solution is 1:20, and the knitted garment is immersed in the solution and immersed at 50°C for 30 minutes. The dehydrated knitted garment is placed in an oven at 100°C for 50 minutes to fully solidify the finishing agent on the fabric surface, thereby obtaining a thermostatic and antibacterial functional knitted garment.

[0037] The phase change temperature range of the garment produced by this process is 30~40°C, and the phase change enthalpy is 180J / g; after washing the garment 50 times, the phase change temperature range of the garment is still 30~40°C, and the phase change enthalpy is still 180J / g, which has good temperature regulation performance. The antibacterial rates of this garment against Staphylococcus aureus, Escherichia coli and Candida albicans are 99.5%, 98% and 97% respectively; after washing 50 times, the antibacterial rates of this garment against Staphylococcus aureus, Escherichia coli and Candida albicans are 96%, 95% and 93% respectively, achieving good antibacterial properties.

[0038] Comparative Example 1 The antibacterial performance test of knitted fabrics that were not impregnated with temperature-regulating antibacterial finishing agents found that their inhibition rates against Staphylococcus aureus, Escherichia coli and Candida albicans were all zero.

[0039] Comparative Example 2 For comparison with Example 1, the step of mixing the purified MXene dispersion and the PVA aqueous solution in step S2 is omitted, and the specific steps are as follows: S1, 10g Ti3AlC2 powder was added to a 50% hydrofluoric acid (HF) solution and stirred at 25°C for 3h to form a Ti3C2T2O3 with a two-dimensional layered structure. x MXene.

[0040] S2, the reaction product was centrifuged in a high-speed centrifuge at 9000r / min for 25min, and washed repeatedly with deionized water 4 times to remove surface impurities. The washed MXene suspension was ultrasonicated at 200W for 45min to effectively peel and disperse the MXene flakes. After the reaction, the modified MXene-PVA material was separated by centrifugation at 5000r / min, and washed repeatedly with deionized water 4 times to remove impurities. The MXene-PVA material was placed in a vacuum drying oven at 70°C and dried for 7h to obtain modified MXene powder.

[0041] S3, using the emulsification-solvent evaporation method, 1g of lauric acid was dissolved in 15mL of dichloromethane organic solvent to form an oil phase. 0.5g of PPy was dissolved in the water phase to form an oil-water emulsion, and the thermostatic antibacterial microcapsules were separated by centrifugation at a speed of 4500r / min, and washed with deionized water 4 times. The collected microcapsules were placed in a vacuum drying oven at 60°C and dried for 3h to obtain dry thermostatic antibacterial microcapsules.

[0042] S4, mechanically stirring the modified MXene powder and the temperature-regulating antibacterial microcapsules in a mass ratio of 2:0.75, reacting at 35°C for 45 minutes, to obtain a temperature-regulating antibacterial functional MXene material. The temperature-regulating antibacterial functional MXene material and the PVA adhesive were mixed in a mass ratio of 6.5:3.5, and stirred to obtain a temperature-regulating antibacterial finishing agent for knitted garments.

[0043] S5, when the finishing agent is impregnated, the finishing agent is used in an amount of 5% of the weight of the knitted garment, the bath ratio of the finishing solution is 1:10, and the knitted garment is immersed in the solution and immersed for 20 minutes at 40°C. The dehydrated knitted garment is placed in an oven at 80°C for 40 minutes to fully solidify the finishing agent on the fabric surface, thereby obtaining a thermostatic and antibacterial functional knitted garment.

[0044] Therefore, the present application provides a temperature-regulating and antibacterial knitted fabric and a preparation method thereof, which fully utilizes the high thermal conductivity of MXene, the excellent antibacterial properties of PPy, and the temperature-regulating function of lauric acid phase change materials, and develops an intelligent knitted garment temperature-regulating and antibacterial finishing agent with excellent performance. The finishing agent is compounded onto sports knitted garments by an impregnation method to achieve a temperature-regulating and antibacterial functional sports knitted garment, which can significantly improve the active temperature-regulating and antibacterial functions of knitted garments.

[0045] In the description of this specification, the description with reference to the terms "an experimental example", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the experimental example or example are included in at least one experimental example or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same experimental example or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more experimental examples or examples in a suitable manner.

[0046] Finally, it should be noted that the above experimental examples are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred experimental examples, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for preparing a temperature-regulating antibacterial knitted fabric, characterized in that: The following steps are included: S1, adding Ti3AlC2 powder into hydrofluoric acid solution, stirring and reacting at room temperature to form Ti3C2T with a two-dimensional layered structure x MXene. S2, the Ti3C2T obtained in step S1 x MXene is purified and exfoliated by centrifugal washing and ultrasonic treatment to obtain MXene microsheets; active sites on the surface of MXene microsheets are increased by grafting polyvinyl alcohol, and MXene-PVA materials are prepared by centrifugation. The MXene-PVA materials are washed with deionized water to remove impurities and dried to obtain modified MXene powder; S3, using emulsification-solvent evaporation method, polypyrrole as shell material and lauric acid as core material, to prepare thermoregulatory antibacterial microcapsules; S4, compounding the modified MXene powder and the temperature-regulating antibacterial microcapsules by mechanical stirring and electrostatic adsorption to obtain a temperature-regulating antibacterial functional MXene material; then mixing the obtained temperature-regulating antibacterial functional MXene material with a PVA adhesive to prepare a temperature-regulating antibacterial finishing agent for knitted garments; S5, applying the temperature regulating and antibacterial finishing agent to the knitted garment by an impregnation method to obtain the sports knitted garment with temperature regulating and antibacterial properties.

2. The method for preparing a temperature-regulating antibacterial knitted fabric according to claim 1, characterized in that: Ti3AlC2 powder is used as MXene precursor raw material with a purity of ≥98%. Lauric acid is used as phase change material with a phase change temperature range of 30~40℃ and a phase change enthalpy of ≥150J / g. The molecular weight of PVA adhesive is 10000~20000.

3. The method for preparing a temperature-regulating antibacterial knitted fabric according to claim 2, characterized in that: In step S1, the concentration of the hydrofluoric acid solution is 48-52%, the reaction temperature is controlled at 23-27° C., and the reaction time is 2-4 h.

4. The method for preparing a temperature-regulating antibacterial knitted fabric according to claim 3, characterized in that: In step S2, the centrifugal washing step is: centrifuge the Ti3C2TxMXene obtained in step S1 in a high-speed centrifuge at 8000-10000 r / min for 20-30 min, and wash it with deionized water for 3-5 times; the ultrasonic treatment step is: ultrasonicate the washed MXene suspension at 200 W for 30 min-60 min; increase the active sites on the surface of the MXene microsheets by grafting polyvinyl alcohol, centrifuge to prepare MXene-PVA material, wash it with deionized water to remove impurities, and then wash the MXene-PVA material with deionized water. The specific steps of drying the VA material to obtain the modified MXene powder are as follows: mixing the purified MXene dispersion and the PVA aqueous solution in a mass ratio of 1:1-1:2, reacting at 40-60°C for 2-4h. After the reaction, separating the modified MXene-PVA material by centrifugation at a speed of 4000r / min-6000r / min, washing with deionized water for 3-5 times to remove impurities, and drying the MXene-PVA material in a vacuum drying oven at 60-80°C for 6-8h to obtain the modified MXene powder.

5. The method for preparing a temperature-regulating antibacterial knitted fabric according to claim 4, characterized in that: In step S3, the emulsification-solvent evaporation method is adopted, polypyrrole is used as the shell material, and lauric acid is used as the core material. The specific steps of preparing the temperature-regulating antibacterial microcapsules are as follows: 0.5-1.5 g of lauric acid is dissolved in 10-20 ml of dichloromethane organic solvent to form an oil phase, 0.25-0.75 g of PPy is dissolved in the water phase to form an oil-water emulsion, and the temperature-regulating antibacterial microcapsules are separated by a centrifugal speed of 4000-5000 r / min, and washed with deionized water for 3-5 times, and the collected temperature-regulating antibacterial microcapsules are placed in a vacuum drying oven at 50-70°C and dried for 2-4 hours.

6. The method for preparing a temperature-regulating antibacterial knitted fabric according to claim 1, characterized in that: In step S4, the modified MXene powder and the temperature-regulating antibacterial microcapsules are mechanically stirred in a mass ratio of 2:0.5 to 2:1, and reacted at 30 to 40°C for 40 to 50 minutes to obtain a temperature-regulating antibacterial functional MXene material. The temperature-regulating antibacterial functional MXene material and the PVA adhesive are mixed in a mass ratio of 6:4 to 7:3 and stirred to obtain a temperature-regulating antibacterial finishing agent for knitted garments.

7. The method for preparing a temperature-regulating antibacterial knitted fabric according to claim 6, characterized in that: In step S5, the specific steps of applying the temperature regulating antibacterial finishing agent to the knitted garment by the immersion method are: immersing the knitted garment in the temperature regulating antibacterial solution at 40-50° C. for 20-30 minutes, and drying the dehydrated knitted garment in an oven at 80-100° C. for 40-50 minutes.

8. The method for preparing a temperature-regulating antibacterial knitted fabric according to claim 7, characterized in that: When impregnating the finishing agent, the dosage of the temperature regulating antibacterial finishing agent is 5~7% of the weight of the knitted garment, and the bath ratio of the finishing liquid is 1:10~20.

9. Thermostatic antibacterial knitted fabric prepared according to the method for preparing a thermostatic antibacterial knitted fabric according to any one of claims 1 to 8.