Warm-keeping polyester fabric and preparation method thereof

Abstract

The invention provides a warm-keeping polyester fabric and a preparation method thereof, the warm-keeping fabric comprises a polyester fabric layer and a composite electrostatic spinning film, the polyester fabric layer and the composite electrostatic spinning film are compounded through hot pressing, and the composite electrostatic spinning film contains thermoplastic polyurethane and polyethyleneimine. And carboxylated carbon nanotubes and hydroxyapatite. The composite electrostatic spinning membrane prepared in the invention has a ternary gradient pore structure, and through solvent volatilization and filler distribution regulation and control, a multi-stage air retention network of micron-sized inter-fiber macropores, submicron-sized fiber inner pores and nano-sized filler interface pores is formed, so that the thermal insulation performance of the polyester fabric is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of textile fabrics, in particular to a warm polyester fabric and a preparation method thereof. BACKGROUND

[0002] Polyester is the common name of polyester fiber, also known as polyethylene terephthalate fiber. It belongs to high molecular compound and is one of the chemical fibers with the highest global production. Due to the regular benzene ring skeleton and the alternating arrangement of ester groups, polyester exhibits a high degree of symmetry in its crystalline properties, which makes it exhibit mechanical strength far exceeding that of natural fibers. The breaking strength of standard polyester fiber can reach 4.5-7.5 cN / dtex, which is 2-3 times that of cotton fiber. Even in the wet state, the strength loss rate is less than 10%. This characteristic makes it dominate in fields such as outdoor equipment and safety protective clothing, which have high requirements for durability. In addition, its wear resistance is also outstanding, and the polyester fabric can reach more than 50,000 times in the Martindale wear test, which is significantly better than nylon and acrylic, and is particularly suitable for making luggage, sofa fabric and other high-friction scene application materials. Therefore, in recent years, polyester fabric has become a popular fabric in the textile field. However, the crystallinity of polyester fiber itself is as high as 60%-80%, and the tightly stacked molecular chains result in low porosity (usually <5%) inside the fiber, which cannot effectively trap still air, resulting in poor warmth retention performance. Therefore, it is necessary to improve the warmth retention performance. Currently, the warmth retention rate can be improved by preparing hollow polyester fibers, but the hollowing process will increase the production cost. In addition, although the warmth retention of polyester can be improved by adding graphene, ceramic particles and other modifiers, these modifiers will reduce the strength of the fiber and affect the dyeing uniformity. SUMMARY

[0003] The technical problem to be solved is to provide a warm polyester fabric and a preparation method thereof. The composite fiber membrane prepared by electrospinning and the polyester fabric are used to prepare the warm polyester fabric.

[0004] Technical scheme: A warm polyester fabric, which comprises a polyester fabric layer and a composite electrospinning membrane, the composite electrospinning membrane contains thermoplastic polyurethane, polyethyleneimine, carboxylated carbon nanotubes and hydroxyapatite, the polyester fabric layer and the composite electrospinning membrane are formed by hot pressing, the polyester fabric layer and the composite electrospinning membrane form a network grid, and the network grid is a hollow structure. Preferably, the network grid is any one or a combination of circular, triangular or polygonal shapes. Preferably, the area of the network grid is 4-16 mm 2 . Preferably, the preparation method comprises the following steps: S1. preparing a composite electrospun membrane; S2. laminating polyester fabric on the surface of the composite electrospun membrane obtained in S1, and then performing compounding by using a hot-pressing process to obtain a warm-keeping polyester fabric. Preferably, the preparation of the composite electrospun membrane in S1 comprises the following steps: S21. adding thermoplastic polyurethane and polyethylene imine into a DMF / THF mixed solution, and adding heated stirring to obtain a solution A with a mass fraction of 12-15wt%; S22. adding carboxylated carbon nanotubes into DMF, and ultrasonic dispersion to obtain a dispersion B with a mass fraction of 1-4wt%; S23. adding hydroxyapatite into THF, and ultrasonic dispersion to obtain a dispersion C with a mass fraction of 1-3wt%; S24. slowly adding the solution A into the dispersion B, and adding the dispersion C after stirring to obtain an electrospinning solution; S25. electrospinning using the electrospinning solution obtained in S24 to obtain a nascent composite electrospun membrane; S26. annealing the nascent composite electrospun membrane obtained in S25 to obtain a composite electrospun membrane. Preferably, the volume ratio of DMF to THF in S21 is 4-8:1-5; The mass ratio of thermoplastic polyurethane to polyethylene imine in S21 is 7-9:3-5; The heating temperature in S21 is 65-85℃. Preferably, the volume ratio of the solution A, the dispersion B to the dispersion C in S24 is 10:1-3:1-4. Preferably, the voltage of electrospinning in S25 is 18-28kV; The spinning speed in S25 is 0.5-1.5mL / h; The temperature in S25 is 23-27℃; The humidity in S25 is 55-65%; In S25, an asymmetric electrode is used as a receiving device, the receiving distance is 15-25cm, and the receiving rotation speed is 500-600rpm. Preferably, in S26, the annealing treatment of the nascent composite electrospun membrane is heating treatment at 180-200℃ under nitrogen protection for 0.5-1h. Preferably, the hot-pressing temperature in S2 is 100-120℃; The hot-pressing pressure in S2 is 0.8-1.2MPa; The hot-pressing time in S2 is 50-90s; The thickness of the warm-keeping polyester fabric in S2 is 2.5-3.5mm. Advantages: The application has the following advantages: 1. In the application, the micro-phase separation of polyetherimide and thermoplastic polyurethane elastomer forms a discontinuous interface micro-phase separation, which leads to enhanced phonon scattering and effectively blocks the heat conduction path; and the phase separation interface of polyetherimide and thermoplastic polyurethane elastomer can form nanoscale pores in the fiber, and the accumulation between fibers produces micrometer-scale pores, forming a heat insulation structure that locks air in large pores and prevents convection in small pores, thereby improving the warmth retention performance of the film material; 2. In the application, the near-infrared reflection (8-14 μm) of carboxylated carbon nanotubes and the mid-infrared scattering (5-25 μm) of hydroxyapatite and HA synergistically block human heat radiation; in addition, the surface polarity of carboxylated carbon nanotubes is improved, which enables them to be arranged in a direction in the polyetherimide phase, thereby improving the reflectivity in the near-infrared reflection band; and the hydroxyl groups on the surface of hydroxyapatite form hydrogen bonds with the urethane groups of the thermoplastic polyurethane elastomer, forming a "thermoplastic polyurethane elastomer-hydroxyapatite" micro-domain structure, which further divides the pore space; 3. In the application, the nascent electrospun film is annealed at high temperature under nitrogen protection, which promotes the rearrangement of polyetherimide molecular chains, improves the crystallinity, and reduces the thermal conductivity; in addition, annealing treatment can release the internal stress of the fiber, reduce the pore collapse caused by solidification shrinkage, and maintain the pore structure of the fiber, which is beneficial to the long-term maintenance of the warmth retention performance in the subsequent use process; 4. The composite electrospun film prepared in the application has a ternary gradient pore structure, which forms a multi-level air retention network of micrometer-scale inter-fiber macropores, sub-micrometer-scale intra-fiber pores, and nanometer-scale filler interface pores through solvent evaporation and filler distribution regulation; in addition, a square hot pressing mold is used in the hot pressing process of the polyester fabric layer and the composite electrospun film, and the hot pressing temperature is lower than the decomposition temperature of the thermoplastic polyurethane elastomer, which ensures the hot pressing effect while also preserving the original pore structure of the composite electrospun film, which is beneficial to improving the warmth retention performance of the composite fabric. DETAILED DESCRIPTION The application will be further described below in conjunction with the examples, which are an explanation of the application but the application is not limited to the following examples: Example 1 A warmth-retaining polyester fabric, which comprises a polyester fabric layer and a composite electrospun film, the composite electrospun film containing thermoplastic polyurethane, polyethyleneimine, carboxylated carbon nanotubes and hydroxyapatite, the polyester fabric layer and the composite electrospun film being combined by hot pressing, the polyester fabric layer and the composite electrospun film forming a circular network grid, the middle of the circular network grid being a hollow structure, the area of the circular network grid being 4mm 2 . The preparation method comprises the following steps: S1. preparing a composite electrospun membrane; S2. laminating the polyester fabric on the surface of the composite electrospun membrane obtained in S1, and then performing composite by using a hot-pressing process, wherein the hot-pressing mold used is a square mold, the hot-pressing temperature is 100℃, the hot-pressing pressure is 0.8MPa, and the time is 90s, to obtain a warm-keeping polyester fabric with a thickness of 2.5mm. The preparation of the composite electrospun membrane in S1 comprises the following steps: S21. adding thermoplastic polyurethane and polyethylene imine with a mass ratio of 7:3 into a DMF / THF mixed solution with a volume ratio of 4:1, and heating to 65℃ to obtain a solution A with a mass fraction of 12wt%; S22. adding carboxylated carbon nanotubes into DMF to obtain a dispersion B with a mass fraction of 1wt% by ultrasonic dispersion; S23. adding hydroxyapatite into THF to obtain a dispersion C with a mass fraction of 1wt% by ultrasonic dispersion; S24. slowly adding the solution A into the dispersion B, and then adding the dispersion C after stirring, wherein the volume ratio of the solution A, the dispersion B and the dispersion C is 10:1:1, to obtain an electrospinning solution; S25. electrospinning using the electrospinning solution obtained in S24, wherein the voltage for electrospinning is 18kV, the spinning speed is 0.5mL / h, the spinning temperature is 23℃, the spinning humidity is 65%, the asymmetric electrode is used as the receiving device, the receiving distance is 15cm, and the receiving rotation speed is 500rpm, to obtain a nascent composite electrospun membrane; S26. annealing the nascent composite electrospun membrane obtained in S25, and heating the nascent composite electrospun membrane at 180℃ for 0.5h under nitrogen protection to obtain a composite electrospun membrane. Example 2 A warm-keeping polyester fabric, which comprises a polyester fabric layer and a composite electrospun membrane, the composite electrospun membrane comprising thermoplastic polyurethane, polyethylene imine, carboxylated carbon nanotubes and hydroxyapatite, the polyester fabric layer and the composite electrospun membrane being formed by hot-pressing composite, and the polyester fabric layer and the composite electrospun membrane forming a triangular network grid with a hollow structure in the middle and an area of 16mm 2 . The preparation method comprises the following steps: S1. preparing a composite electrospun membrane; S2. Laying the polyester fabric on the surface of the composite electrospun membrane obtained in S1, and then performing composite by using a hot-pressing process, wherein the hot-pressing mold used is a square mold, the hot-pressing temperature is 110℃, the hot-pressing pressure is 1.2MPa, and the time is 90s, to obtain a warm-keeping polyester fabric with a thickness of 3.5mm. The preparation of the composite electrospun membrane in S1 comprises the following steps: S21. Adding thermoplastic polyurethane and polyethylene imine with a mass ratio of 9:5 into a DMF / THF mixed solution with a volume ratio of 8:5, and heating to 85℃ to obtain a solution A with a mass fraction of 15wt% after stirring; S22. Adding carboxylated carbon nanotubes into DMF to obtain a dispersion B with a mass fraction of 4wt% after ultrasonic dispersion; S23. Adding hydroxyapatite into THF to obtain a dispersion C with a mass fraction of 3wt% after ultrasonic dispersion; S24. Slowly adding the solution A into the dispersion B, and then adding the dispersion C after stirring, wherein the volume ratio of the solution A, the dispersion B and the dispersion C is 10:3:4, to obtain an electrospinning solution; S25. Using the electrospinning solution obtained in S24 to perform electrospinning, wherein the voltage is 28kV, the spinning speed is 1.5mL / h, the spinning temperature is 27℃, the spinning humidity is 55%, the asymmetric electrode is used as the receiving device, and the receiving distance is 25cm and the receiving rotating speed is 600rpm, to obtain a nascent composite electrospun membrane; S26. Annealing the nascent composite electrospun membrane obtained in S25, and heating the nascent composite electrospun membrane at 200℃ for 1h under nitrogen protection to obtain a composite electrospun membrane. Example 3 A warm-keeping polyester fabric, which comprises a polyester fabric layer and a composite electrospun membrane, the composite electrospun membrane comprising thermoplastic polyurethane, polyethylene imine, carboxylated carbon nanotubes and hydroxyapatite, and the polyester fabric layer and the composite electrospun membrane are formed by hot-pressing composite, and the polyester fabric layer and the composite electrospun membrane form a polygonal network grid, the middle of the polygonal network grid is a hollow structure, and the area of the polygonal network grid is 12mm 2 . The preparation method comprises the following steps: S1. Preparing a composite electrospun membrane; S2. Laying the polyester fabric on the surface of the composite electrospun membrane obtained in S1, and then performing composite by using a hot-pressing process, wherein the hot-pressing mold used is a square mold, the hot-pressing temperature is 115℃, the hot-pressing pressure is 1.2MPa, and the time is 90s, to obtain a warm-keeping polyester fabric with a thickness of 3mm. The preparation of the composite electrospun film in S1 comprises the following steps: S21. Thermoplastic polyurethane and polyethyleneimine with a mass ratio of 9:3 are added to a DMF / THF mixed solution with a volume ratio of 8:3, and heated to 85°C for stirring to obtain a solution A with a mass fraction of 15wt%; S22. Carboxylated carbon nanotubes are added to DMF and ultrasonically dispersed to obtain a dispersion B with a mass fraction of 2wt%; S23. Hydroxyapatite is added to THF and ultrasonically dispersed to obtain a dispersion C with a mass fraction of 3wt%; S24. Solution A is slowly added to dispersion B, and then dispersion C is added after stirring, wherein the volume ratio of solution A, dispersion B and dispersion C is 10:2:3, to obtain an electrospinning solution; S25. Electrospinning is performed using the electrospinning solution obtained in S24, the voltage for electrospinning is 25kV, the spinning speed is 1.5mL / h, the spinning temperature is 25°C, the spinning humidity is 60%, an asymmetric electrode is used as a receiving device, the receiving distance is 20cm, and the receiving rotation speed is 500rpm, thereby obtaining a nascent composite electrospun film; S26. The nascent composite electrospun film obtained in S25 is annealed, and the nascent composite electrospun film is heated at 190°C for 0.8h under nitrogen protection to obtain a composite electrospun film. Example 4 A warm polyester fabric, comprising a polyester fabric layer and a composite electrospun film, the composite electrospun film comprising thermoplastic polyurethane, polyethyleneimine, carboxylated carbon nanotubes and hydroxyapatite, the polyester fabric layer and the composite electrospun film being formed by thermal compression, the polyester fabric layer and the composite electrospun film forming a triangular network grid, the triangular network grid having a hollow structure in the middle and an area of 12mm 2 . The preparation method comprises the following steps: S1. A composite electrospun film is prepared; S2. The polyester fabric is laid on the surface of the composite electrospun film obtained in S1, and then a thermal compression process is performed, wherein the thermal compression mold used is a square mold, the thermal compression temperature is 115°C, the thermal compression pressure is 1MPa, and the time is 60s, to obtain a warm polyester fabric with a thickness of 3.5mm. The preparation of the composite electrospun film in S1 comprises the following steps: S21. Thermoplastic polyurethane and polyethyleneimine with a mass ratio of 8:3 are added to a DMF / THF mixed solution with a volume ratio of 5:2, and heated to 70°C for stirring to obtain a solution A with a mass fraction of 14wt%; S22. Carboxylated carbon nanotubes were added to DMF and ultrasonically dispersed to obtain dispersion liquid B with a mass fraction of 3wt%; S23. Hydroxyapatite was added to THF and ultrasonically dispersed to obtain dispersion liquid C with a mass fraction of 3wt%; S24. Solution A was slowly added to dispersion liquid B, and dispersion liquid C was added after stirring, wherein the volume ratio of solution A, dispersion liquid B and dispersion liquid C was 10:1:2, to obtain an electrospinning solution; S25. Electrospinning was performed using the electrospinning solution obtained in S24, the voltage of electrospinning was 22kV, the spinning speed was 1.2mL / h, the spinning temperature was 25℃, the spinning humidity was 65%, an asymmetric electrode was used as a receiving device, the receiving distance was 25cm, and the receiving rotation speed was 550rpm, thereby obtaining a nascent composite electrospinning membrane; S26. The nascent composite electrospinning membrane obtained in S25 was annealed, and the nascent composite electrospinning membrane was heated at 190℃ for 0.5h under nitrogen protection to obtain a composite electrospinning membrane. Example 5 A warm polyester fabric, which comprises a polyester fabric layer and a composite electrospinning membrane, the composite electrospinning membrane comprising thermoplastic polyurethane, polyethyleneimine, carboxylated carbon nanotubes and hydroxyapatite, the polyester fabric layer and the composite electrospinning membrane being formed by thermal compression, the polyester fabric layer and the composite electrospinning membrane forming a triangular network grid, the middle of the triangular network grid being a hollow structure, the area of the triangular network grid being 14mm 2 . The preparation method comprises the following steps: S1. A composite electrospinning membrane was prepared; S2. The polyester fabric was laid on the surface of the composite electrospinning membrane obtained in S1, and then a thermal compression process was performed, wherein the thermal compression mold used was a square mold, the thermal compression temperature was 105℃, the thermal compression pressure was 0.8MPa, and the time was 50s, to obtain a warm polyester fabric with a thickness of 2.5mm. The preparation of the composite electrospinning membrane in S1 comprises the following steps: S21. Thermoplastic polyurethane and polyethyleneimine with a mass ratio of 8:3 were added to a DMF / THF mixed solution with a volume ratio of 4:3, and heated to 85℃ to obtain solution A with a mass fraction of 15wt%; S22. Carboxylated carbon nanotubes were added to DMF and ultrasonically dispersed to obtain dispersion liquid B with a mass fraction of 2wt%; S23. Hydroxyapatite was added to THF and ultrasonically dispersed to obtain dispersion liquid C with a mass fraction of 1wt%; S24. slowly adding solution A to dispersion B, and then adding dispersion C after stirring, wherein the volume ratio of solution A, dispersion B and dispersion C is 10:2:3, to obtain an electrospinning solution; S25. electrospinning the electrospinning solution obtained in S24, wherein the voltage for electrospinning is 25 kV, the spinning speed is 0.5 mL / h, the spinning temperature is 25℃, the spinning humidity is 60%, an asymmetric electrode is used as a receiving device, the receiving distance is 20 cm, and the receiving rotation speed is 500 rpm, thereby obtaining a nascent composite electrospinning membrane; S26. annealing the nascent composite electrospinning membrane obtained in S25, and heating the nascent composite electrospinning membrane at 190℃ for 0.5 h under nitrogen protection to obtain a composite electrospinning membrane. Example 6 A warm polyester fabric, which comprises a polyester fabric layer and a composite electrospinning membrane, wherein the composite electrospinning membrane comprises thermoplastic polyurethane, polyethylene imine, carboxylated carbon nanotubes and hydroxyapatite, and the polyester fabric layer and the composite electrospinning membrane are combined by hot pressing, and the polyester fabric layer and the composite electrospinning membrane form a polygonal network grid, wherein the polygonal network grid has a hollow structure in the middle and an area of 15 mm 2 . The preparation method comprises the following steps: S1. preparing a composite electrospinning membrane; S2. laying the polyester fabric on the surface of the composite electrospinning membrane obtained in S1, and then combining by hot pressing, wherein the hot pressing mold used is a square mold, the hot pressing temperature is 120℃, the hot pressing pressure is 1.2 MPa, and the time is 65 s, thereby obtaining a warm polyester fabric with a thickness of 3 mm. The preparation of the composite electrospinning membrane in S1 comprises the following steps: S21. adding thermoplastic polyurethane and polyethylene imine with a mass ratio of 8:5 to a DMF / THF mixed solution with a volume ratio of 5:3, and heating to 75℃ to obtain a solution A with a mass fraction of 13wt%; S22. adding carboxylated carbon nanotubes to DMF and ultrasonic dispersion to obtain a dispersion B with a mass fraction of 2wt%; S23. adding hydroxyapatite to THF and ultrasonic dispersion to obtain a dispersion C with a mass fraction of 3wt%; S24. slowly adding solution A to dispersion B, and then adding dispersion C after stirring, wherein the volume ratio of solution A, dispersion B and dispersion C is 10:2:4, to obtain an electrospinning solution; S25. electrospinning is performed using the electrospinning solution obtained in S24, the voltage for electrospinning is 25 kV, the spinning speed is 0.8 mL / h, the spinning temperature is 23 °C, the spinning humidity is 65%, an asymmetric electrode is used as a receiving device, the receiving distance is 18 cm, and the receiving rotation speed is 600 rpm, thereby obtaining a nascent composite electrospinning film; S26. annealing treatment is performed on the nascent composite electrospinning film obtained in S25, the nascent composite electrospinning film is heated at 185 °C for 0.8 h under nitrogen protection, thereby obtaining a composite electrospinning film. Example 7 A warm polyester fabric, which comprises a polyester fabric layer and a composite electrospinning film, the composite electrospinning film comprising thermoplastic polyurethane, polyethylene imine, carboxylated carbon nanotubes and hydroxyapatite, the polyester fabric layer and the composite electrospinning film being formed by hot pressing and compounding, the polyester fabric layer and the composite electrospinning film forming a circular network grid, the circular network grid having a hollow structure in the middle and an area of 12 mm 2 . The preparation method comprises the following steps: S1. preparing a composite electrospinning film; S2. the polyester fabric is laid on the surface of the composite electrospinning film obtained in S1, and then hot pressing is performed for compounding, wherein the hot pressing mold used is a square mold, the hot pressing temperature is 100 °C, the hot pressing pressure is 0.9 MPa, and the time is 60 s, thereby obtaining a warm polyester fabric with a thickness of 3 mm. The preparation of the composite electrospinning film in S1 comprises the following steps: S21. thermoplastic polyurethane and polyethylene imine with a mass ratio of 8:5 are added to a DMF / THF mixed solution with a volume ratio of 5:2, and heated to 70 °C for stirring to obtain a solution A with a mass fraction of 13 wt%; S22. carboxylated carbon nanotubes are added to DMF and ultrasonically dispersed to obtain a dispersion liquid B with a mass fraction of 4 wt%; S23. hydroxyapatite is added to THF and ultrasonically dispersed to obtain a dispersion liquid C with a mass fraction of 3 wt%; S24. solution A is slowly added to dispersion liquid B, and after stirring, dispersion liquid C is added, wherein the volume ratio of solution A, dispersion liquid B and dispersion liquid C is 10:2:3, thereby obtaining an electrospinning solution; S25. electrospinning is performed using the electrospinning solution obtained in S24, the voltage for electrospinning is 25 kV, the spinning speed is 1.5 mL / h, the spinning temperature is 27 °C, the spinning humidity is 55%, an asymmetric electrode is used as a receiving device, the receiving distance is 20 cm, and the receiving rotation speed is 550 rpm, thereby obtaining a nascent composite electrospinning film; S26. annealing the as-prepared composite electrospun membrane obtained in S25, heating the as-prepared composite electrospun membrane at 190℃ for 0.6h under nitrogen atmosphere to obtain the composite electrospun membrane. Example 8 A warm polyester fabric, comprising a polyester fabric layer and a composite electrospun membrane, the composite electrospun membrane comprising thermoplastic polyurethane, polyethylene imine, carboxylated carbon nanotube and hydroxyapatite, the polyester fabric layer and the composite electrospun membrane being formed by hot pressing, the polyester fabric layer and the composite electrospun membrane forming a triangular network grid, the triangular network grid having a hollow structure in the middle and an area of 15mm 2 . The preparation method comprises the following steps: S1. preparing a composite electrospun membrane; S2. stacking the polyester fabric on the surface of the composite electrospun membrane obtained in S1, and then performing hot pressing to obtain a warm polyester fabric with a thickness of 3mm, wherein the hot pressing temperature is 100℃, the hot pressing pressure is 0.8MPa, and the hot pressing time is 65s. The preparation of the composite electrospun membrane in S1 comprises the following steps: S21. adding thermoplastic polyurethane and polyethylene imine with a mass ratio of 8:3 into a DMF / THF mixed solution with a volume ratio of 5:3, and heating to 75℃ to obtain a solution A with a mass fraction of 14wt%; S22. adding carboxylated carbon nanotubes into DMF and ultrasonic dispersion to obtain a dispersion liquid B with a mass fraction of 2wt%; S23. adding hydroxyapatite into THF and ultrasonic dispersion to obtain a dispersion liquid C with a mass fraction of 3wt%; S24. slowly adding the solution A into the dispersion liquid B, and then adding the dispersion liquid C after stirring, wherein the volume ratio of the solution A, the dispersion liquid B and the dispersion liquid C is 10:3:4 to obtain an electrospinning solution; S25. electrospinning the electrospinning solution obtained in S24, wherein the electrospinning voltage is 25kV, the spinning speed is 1.5mL / h, the spinning temperature is 27℃, the spinning humidity is 65%, the asymmetric electrode is used as the receiving device, the receiving distance is 20cm, and the receiving rotation speed is 600rpm, thereby obtaining an as-prepared composite electrospun membrane; S26. annealing the as-prepared composite electrospun membrane obtained in S25, heating the as-prepared composite electrospun membrane at 190℃ for 0.8h under nitrogen atmosphere to obtain the composite electrospun membrane. Example 9 A warm polyester fabric, comprising a polyester fabric layer and a composite electrostatic spinning film, wherein the composite electrostatic spinning film comprises thermoplastic polyurethane, polyethylene imine, carboxylated carbon nanotube and hydroxyapatite, and the polyester fabric layer and the composite electrostatic spinning film are combined by hot pressing, and the polyester fabric layer and the composite electrostatic spinning film form a circular network grid, wherein the circular network grid is hollow in the middle and has an area of 15mm 2 . The preparation method comprises the following steps: S1. preparing a composite electrostatic spinning film; S2. laying the polyester fabric on the surface of the composite electrostatic spinning film obtained in S1, and then combining by hot pressing, wherein the hot pressing mold is a square mold, the hot pressing temperature is 115℃, the hot pressing pressure is 1.2MPa, and the time is 60s, to obtain an ear stud warm polyester fabric with a thickness of 3.5mm. The preparation of the composite electrostatic spinning film in S1 comprises the following steps: S21. adding thermoplastic polyurethane and polyethylene imine with a mass ratio of 8:5 into a DMF / THF mixed solution with a volume ratio of 6:5, and heating to 85℃ to obtain a solution A with a mass fraction of 15wt%; S22. adding carboxylated carbon nanotube into DMF and ultrasonic dispersion to obtain a dispersion liquid B with a mass fraction of 2wt%; S23. adding hydroxyapatite into THF and ultrasonic dispersion to obtain a dispersion liquid C with a mass fraction of 2wt%; S24. slowly adding the solution A into the dispersion liquid B, and then adding the dispersion liquid C after stirring, wherein the volume ratio of the solution A, the dispersion liquid B and the dispersion liquid C is 10:3:2, to obtain an electrostatic spinning solution; S25. electrostatic spinning using the electrostatic spinning solution obtained in S24, wherein the voltage is 25kV, the spinning speed is 1.5mL / h, the spinning temperature is 25℃, the spinning humidity is 60%, the asymmetric electrode is used as the receiving device, the receiving distance is 15cm, and the receiving rotation speed is 600rpm, to obtain a nascent composite electrostatic spinning film; S26. annealing treatment of the nascent composite electrostatic spinning film obtained in S25, heating the nascent composite electrostatic spinning film at 190℃ for 0.6h under nitrogen protection to obtain a composite electrostatic spinning film. Example 10 A warm polyester fabric, comprising a polyester fabric layer and a composite electrostatic spinning film, wherein the composite electrostatic spinning film comprises thermoplastic polyurethane, polyethylene imine, carboxylated carbon nanotube and hydroxyapatite, the polyester fabric layer and the composite electrostatic spinning film are combined by hot pressing, the polyester fabric layer and the composite electrostatic spinning film form a triangular network grid, the middle of the triangular network grid is a hollow structure, the area of the triangular network grid is 11mm 2 . The preparation method comprises the following steps: S1. preparing a composite electrostatic spinning film; S2. laying the polyester fabric on the surface of the composite electrostatic spinning film obtained in S1, and then combining by hot pressing process, wherein the hot pressing mold used is a square mold, the hot pressing temperature is 105℃, the hot pressing pressure is 1MPa, and the time is 70s, to obtain a warm polyester fabric with a thickness of 3.5mm. The preparation of the composite electrostatic spinning film in S1 comprises the following steps: S21. adding thermoplastic polyurethane and polyethylene imine with a mass ratio of 5:8 into a DMF / THF mixed solution with a volume ratio of 7:3, and heating to 75℃ to obtain a solution A with a mass fraction of 14wt%; S22. adding carboxylated carbon nanotube into DMF to obtain a dispersion liquid B with a mass fraction of 2wt%; S23. adding hydroxyapatite into THF to obtain a dispersion liquid C with a mass fraction of 3wt%; S24. slowly adding the solution A into the dispersion liquid B, and then adding the dispersion liquid C after stirring, wherein the volume ratio of the solution A, the dispersion liquid B and the dispersion liquid C is 10:2:3, to obtain an electrostatic spinning solution; S25. electrostatic spinning using the electrostatic spinning solution obtained in S24, the voltage of electrostatic spinning is 26kV, the spinning speed is 1.2mL / h, the spinning temperature is 26℃, the spinning humidity is 55%, the asymmetric electrode is used as the receiving device, the receiving distance is 20cm, and the receiving rotation speed is 500rpm, to obtain a nascent composite electrostatic spinning film; S26. annealing treatment of the nascent composite electrostatic spinning film obtained in S25, heating the nascent composite electrostatic spinning film at 185℃ for 0.8h under nitrogen protection to obtain a composite electrostatic spinning film. Comparative Example 1 The difference between Comparative Example 1 and Example 10 is that the preparation of the composite electrostatic spinning film in S1 comprises the following steps: S21. Thermoplastic polyurethane and polyethyleneimine with a mass ratio of 5:8 were added into a DMF / THF mixed solution with a volume ratio of 7:3, and heated to 75℃ to obtain a solution A with a mass fraction of 14wt% under stirring; S22. Carboxylated carbon nanotubes were added into DMF to obtain a dispersion B with a mass fraction of 2wt% under ultrasonic dispersion; S23. Solution A was slowly added into dispersion B, wherein the volume ratio of solution A to dispersion B was 10:2 to obtain an electrospinning solution; S24. Electrospinning was performed using the electrospinning solution obtained in S24, the voltage of electrospinning was 26kV, the spinning speed was 1.2mL / h, the spinning temperature was 26℃, the spinning humidity was 55%, an asymmetric electrode was used as a receiving device, the receiving distance was 20cm, and the receiving rotation speed was 500rpm, thereby obtaining a nascent composite electrospinning membrane; S25. The nascent composite electrospinning membrane obtained in S24 was annealed, and the nascent composite electrospinning membrane was heated at 185℃ for 0.8h under nitrogen protection to obtain a composite electrospinning membrane. Comparative Example 2 Comparative Example 2 and Example 10 differ in that the preparation of the composite electrospinning membrane in S1 comprises the following steps: S21. Thermoplastic polyurethane and polyethyleneimine with a mass ratio of 5:8 were added into a DMF / THF mixed solution with a volume ratio of 7:3, and heated to 75℃ to obtain a solution A with a mass fraction of 14wt% under stirring; S22. Hydroxyapatite was added into THF to obtain a dispersion B with a mass fraction of 3wt% under ultrasonic dispersion; S23. Solution A was slowly added into dispersion B, wherein the volume ratio of solution A to dispersion B was 10:3 to obtain an electrospinning solution; S24. Electrospinning was performed using the electrospinning solution obtained in S24, the voltage of electrospinning was 26kV, the spinning speed was 1.2mL / h, the spinning temperature was 26℃, the spinning humidity was 55%, an asymmetric electrode was used as a receiving device, the receiving distance was 20cm, and the receiving rotation speed was 500rpm, thereby obtaining a nascent composite electrospinning membrane; S25. The nascent composite electrospinning membrane obtained in S25 was annealed, and the nascent composite electrospinning membrane was heated at 185℃ for 0.8h under nitrogen protection to obtain a composite electrospinning membrane. Comparative Example 3 wherein the preparation of the composite electrospinning membrane in S1 comprises the following steps: S21. Thermoplastic polyurethane and polyethyleneimine with a mass ratio of 5:8 were added to a DMF / THF mixed solution with a volume ratio of 7:3, and heated to 75°C to obtain a solution A with a mass fraction of 14wt%; S22. Electrospinning was performed using the electrospinning solution obtained in S21, the voltage for electrospinning was 26kV, the spinning speed was 1.2mL / h, the spinning temperature was 26°C, the spinning humidity was 55%, an asymmetric electrode was used as the receiving device, the receiving distance was 20cm, and the receiving rotation speed was 500rpm, thereby obtaining a nascent composite electrospinning film; S23. The nascent composite electrospinning film obtained in S25 was annealed, and the nascent composite electrospinning film was heated at 185°C for 0.8h under nitrogen protection to obtain a composite electrospinning film. Comparative Example 4 Comparative Example 4 and Example 10 differ in that no thermoplastic polyurethane was added in S21. Comparative Example 5 Comparative Example 5 and Example 10 differ in that a symmetric electrode was used as the receiving device in S25. Comparative Example 6 Comparative Example 6 and Example 10 differ in that the preparation of the composite electrospinning film in S1 comprises the following steps: S21. Thermoplastic polyurethane and polyethyleneimine with a mass ratio of 5:8 were added to a DMF / THF mixed solution with a volume ratio of 7:3, and heated to 75°C to obtain a solution A with a mass fraction of 14wt%; S22. Carboxylated carbon nanotubes were added to DMF to obtain a dispersion B with a mass fraction of 2wt% by ultrasonic dispersion; S23. Hydroxyapatite was added to THF to obtain a dispersion C with a mass fraction of 3wt% by ultrasonic dispersion; S24. Solution A was slowly added to dispersion B, and then dispersion C was added after stirring, wherein the volume ratio of solution A, dispersion B and dispersion C was 10:2:3, to obtain an electrospinning solution; S25. Electrospinning was performed using the electrospinning solution obtained in S24, the voltage for electrospinning was 26kV, the spinning speed was 1.2mL / h, the spinning temperature was 26°C, the spinning humidity was 55%, an asymmetric electrode was used as the receiving device, the receiving distance was 20cm, and the receiving rotation speed was 500rpm, thereby obtaining a nascent composite electrospinning film. Comparative Example 7 The difference between Comparative Example 7 and Example 10 is that the polyester fabric layer in S2 is completely attached to the composite electrostatic spinning film, and a triangular network grid with hollow structure is not formed. Performance test The performance of the obtained examples and comparative examples in the present application was tested, and the results are shown in the following table: Cron value (col) Far infrared emissivity Thermal resistance (m 2 K / W) Example 1 0.763 0.935 63.5 Example 2 0.785 0.982 65.2 Example 3 0.791 0.956 64.8 Example 4 0.812 0.941 67.1 Example 5 0.778 0.978 68.8 Example 6 0.805 0.993 66.4 Example 7 0.767 0.967 65.9 Example 8 0.819 0.949 64.1 Example 9 0.798 0.986 67.6 Example 10 0.801 0.952 68.2 Comparative Example 1 0.685 0.731 54.2 Comparative Example 2 0.611 0.755 56.7 Comparative Example 3 0.598 0.714 53.8 Comparative Example 4 0.549 0.698 55.5 Comparative Example 5 0.522 0.655 57.9 Comparative Example 6 0.637 0.667 58.3 Comparative Example 7 0.598 0.672 57.4 Note: 1. The heat preservation performance test refers to the GB / T11048-2008 standard, the thermal resistance is adjusted under the condition of ambient temperature 20℃ and relative humidity 65% for 24h, the test hot plate temperature is 35℃, and the test time is 1h; 2. The far infrared performance test refers to GB / T 30127-2013, and the far infrared emissivity is used for evaluation. Obviously, the above examples are only examples for clearly illustrating, and are not limitation to the embodiments. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and also impossible to enumerate all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A thermal polyester fabric, characterized by: The warm polyester fabric comprises a polyester fabric layer and a composite electrostatic spinning film, the composite electrostatic spinning film comprises thermoplastic polyurethane, polyethylene imine, carboxylated carbon nanotube and hydroxyapatite, the polyester fabric layer and the composite electrostatic spinning film are formed by hot pressing, and the polyester fabric layer and the composite electrostatic spinning film form a network grid, and the network grid is a hollow structure.

2. The thermal polyester fabric of claim 1, wherein: The network grid is in any one of a circular shape, a triangular shape or a polygonal shape, or a combination of several thereof.

3. The thermal polyester fabric of claim 1, wherein: The area of the network grid is 4-16 mm 2 .

4. The method for preparing the thermal insulation polyester fabric according to claim 1, characterized in that: The preparation method comprises the following steps: S1. preparing a composite electrostatic spinning film; S2. laying the polyester fabric on the surface of the composite electrostatic spinning film obtained in S1, and then performing hot pressing to obtain the warm polyester fabric.

5. The method of claim 4, wherein the thermal polyester fabric is prepared by the steps of: The preparation of the composite electrostatic spinning film in S1 comprises the following steps: S21. adding thermoplastic polyurethane and polyethylene imine into a DMF / THF mixed solution to obtain a solution A with a mass fraction of 12-15 wt% by heating and stirring; S22. adding carboxylated carbon nanotube into DMF to obtain a dispersion B with a mass fraction of 1-4 wt% by ultrasonic dispersion; S23. adding hydroxyapatite into THF to obtain a dispersion C with a mass fraction of 1-3 wt% by ultrasonic dispersion; S24. slowly adding the solution A into the dispersion B, and then adding the dispersion C after stirring to obtain an electrostatic spinning solution; S25. performing electrostatic spinning using the electrostatic spinning solution obtained in S24 to obtain a nascent composite electrostatic spinning film; S26. performing annealing treatment on the nascent composite electrostatic spinning film obtained in S25 to obtain a composite electrostatic spinning film.

6. The method of claim 5, wherein the thermal polyester fabric is prepared by the steps of: The volume ratio of DMF to THF in S21 is 4-8:1-5; And / or, the mass ratio of thermoplastic polyurethane to polyethylene imine in S21 is 7-9:3-5; And / or, the heating temperature in S21 is 65-85℃.

7. The method for preparing the thermal insulation polyester fabric according to claim 5, characterized in that: The volume ratio of the solution A, the dispersion B and the dispersion C in S24 is 10:1-3:1-4.

8. The method for preparing the thermal insulation polyester fabric according to claim 5, characterized in that: The voltage of electrostatic spinning in S25 is 18-28 kV; And / or, the spinning speed in S25 is 0.5-1.5 mL / h; And / or, the temperature in S25 is 23-27℃; And / or, the humidity in S25 is 55-65%; And / or, an asymmetric electrode is used as a receiving device in S25, the receiving distance is 15-25 cm, and the receiving rotating speed is 500-600 rpm.

9. The method for preparing the thermal insulation polyester fabric according to claim 5, characterized in that: In S26, the nascent composite electrostatic spinning film is heated at 180-200℃ for 0.5-1 h under nitrogen protection.

10. The method for preparing the thermal insulation polyester fabric according to claim 4, characterized in that: The hot pressing temperature in S2 is 100-120℃; And / or, the hot pressing pressure in S2 is 0.8-1.2 MPa; And / or, the hot pressing time in S2 is 50-90 s; And / or, the thickness of the warm polyester fabric in S2 is 2.5-3.5 mm.