Intelligent thermal radiation regulation superstructure fiber and preparation method and fabric thereof

Abstract

The application provides a kind of intelligent thermal radiation regulation superstructure fiber and its preparation method, fabric, including high-emission core layer yarn located in inner layer and low-emission shell layer yarn located in outer layer;The high-emission core layer yarn includes one or more of high-emission polymer yarn, high-emission polymer-inorganic micro-nanoparticle composite yarn;The low-emission shell layer yarn includes one or more of metal filament, metal coating yarn, conductive solution coating yarn.The superstructure fiber provided by the application includes high-emission core layer yarn located in inner layer and low-emission shell layer yarn located in outer layer, shell layer metal yarn has spacing-dependent resonant coupling absorption, and the core layer and shell layer two yarns have completely opposite infrared radiation characteristics, can realize high-performance dynamic radiation modulation rate.

Description

Technical Field

[0001] This invention relates to the field of radiation heat regulation technology, specifically to an intelligent thermal radiation regulation superstructure fiber and its preparation method and fabric. Background Technology

[0002] Fabrics are an indispensable part of our lives, serving as a "second skin" for human thermal regulation. The design of fabric radiation properties is of great significance in a wide range of applications, including personal thermal management clothing, energy-efficient buildings, infrared camouflage, and smart displays and communications. Radiation-modulated fabrics, through the regulation of multi-band optical absorption, reflection, and transmission, can achieve energy-saving intelligent temperature control. Compared to high-energy-consuming equipment such as air conditioners, radiation-modulated fabrics can achieve localized thermal management on the surface of target objects, significantly saving energy and aligning with the important development trend of the national dual-carbon policy.

[0003] In recent years, significant progress has been made in the development of single-function radiative cooling or radiative heating fabrics, but they still struggle to meet the thermal management requirements under various complex temperature environments. To date, only a few reports have documented dynamically modulated radiative heat fabrics: In 2019, Wang et al. from the University of Maryland (Science 363, 619–623 (2019)) coated carbon nanotubes onto bicrystalline fibers, achieving an infrared modulation rate of 12% under different humidity conditions; in 2020, Ergoktas et al. from the University of Manchester (Nano Lett. 2020, 20, 5346-5352) developed a graphene-based adaptive infrared fabric on a conductive fabric substrate using chemical vapor deposition, with a fabric size of only 15 × 15 cm. 2 Its infrared emissivity changed from 0.7 to 0.35 under different voltages, with a modulation rate of 0.35; in the patent field, no one has reported on fibers and fabrics with modulated thermal radiation.

[0004] However, existing dynamic thermal control fabrics have low modulation amplitude, high preparation cost, and small fabric area, making them difficult to meet the needs of industrial applications. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a smart thermal radiation-controlled superstructure fiber, its preparation method, and fabric. The superstructure fiber provided by the present invention comprises a high-emissivity core yarn located in the inner layer and a low-emissivity shell yarn located in the outer layer. The shell metal yarn has spacing-dependent resonant coupling absorption, and the core and shell yarns have completely opposite infrared radiation characteristics. Compared with thermally controlled fibers in other studies, the smart thermal radiation-controlled superstructure fiber and fabric of the present invention can achieve a high-performance dynamic radiation modulation rate.

[0006] This invention provides a smart thermal radiation-regulated superstructure fiber, characterized in that it comprises a high-emissivity core layer yarn located in the inner layer and a low-emissivity shell layer yarn located in the outer layer;

[0007] The high-emissivity core layer yarn includes one or more of high-emissivity polymer yarn and high-emissivity polymer-inorganic micro-nano particle composite yarn.

[0008] The low-emission shell yarn includes one or more of the following: metal filaments, metal-coated yarns, and conductive solution-coated yarns.

[0009] In one embodiment, the high-emission polymer includes one or more of polyurethane, polydimethylsiloxane, styrene-ethylene-butene-styrene block copolymer, polypropylene terephthalate, polyamide, polyethylene, polypropylene, polyethylene terephthalate, polybutylene terephthalate, polyolefin elastomer, and thermoplastic polyamide elastomer.

[0010] The inorganic micro / nano particles include one or more of the following: aluminum oxide, titanium dioxide, silicon dioxide, zinc oxide, barium sulfate, silicon carbide, silicon nitride, zinc sulfide, magnesium oxide, iron oxide, boron nitride, barium carbonate, and aluminum silicate.

[0011] The metal filaments include one or more of the following: silver wire, copper wire, gold wire, aluminum wire, titanium wire, tungsten wire, platinum wire, and stainless steel wire.

[0012] The metal-coated yarn comprises one or more of the following: silver layer, gold layer, copper layer, aluminum layer, and platinum layer.

[0013] The conductive solution-coated yarn includes one or more of poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid, polyaniline, polypyrrole, liquid metal, and transition metal carbon / nitrogen / carbonitride.

[0014] In one embodiment, the diameter of the high-emissivity core yarn is 50μm-2000μm, the particle size of the inorganic micro / nano particles is 0.01μm-30μm, and the volume ratio of the high-emissivity polymer to the inorganic micro / nano particles is 1:(0.02-1).

[0015] In one embodiment, the diameter of the low-emission shell yarn is 1μm-1000μm, and the thickness of both the metal coating and the conductive solution coating is 0.01μm-1μm.

[0016] The second aspect of the present invention also provides a method for preparing the above-mentioned intelligent thermal radiation-controlled superstructure fiber, comprising the following steps: using a high-emissivity core yarn as an axis, rotating and wrapping a low-emissivity shell yarn around the high-emissivity core yarn, and then collecting it through an automatic winding device to obtain the intelligent thermal radiation-controlled superstructure fiber.

[0017] In one embodiment, the rotational wrapping speed of the low-emission shell yarn is 100rpm-3000rpm, and the collection speed of the automatic winding device is 50mm / min-300mm / min.

[0018] In one embodiment, the method further includes coating or covering the smart thermal radiation-controlled superstructure fiber with colored pigments to obtain the colored smart thermal radiation-controlled superstructure fiber.

[0019] In one embodiment, the colored pigment comprises an infrared transparent pigment and a polymer;

[0020] The infrared transparent pigment includes one or more of zinc oxide, barium fluoride, iron oxide, nano-silica powder, Prussian blue, goethite, and zinc selenide;

[0021] The polymer includes one or more of polyamide 6, polyamide 66, polyethylene, polymethylpentene, polytetrafluoroethylene, polymethyl methacrylate, or styrene-ethylene-butene-styrene block copolymer;

[0022] The mass mixing ratio of the infrared transparent pigment to the polymer is (0.2-15):1.

[0023] A third aspect of the present invention also provides a fabric comprising the above-mentioned intelligent thermal radiation-regulated superstructure fiber and other fibers, obtained by weaving, knitting, or braiding, wherein:

[0024] The intelligent thermal radiation-regulated superstructure fiber is used as both warp and weft yarns; or the intelligent thermal radiation-regulated superstructure fiber is used as one type of warp and weft yarn, and the other fiber is used as the other type of warp and weft yarn.

[0025] In one embodiment, the other fibers include one or more of the following: metallic yarn, cotton yarn, linen yarn, and polyester yarn.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The low-emissivity shell yarn has spacing-dependent resonant coupling absorption and low infrared emissivity. After being rotated and wrapped with a high-emissivity core yarn that has a high infrared emissivity and infrared emission characteristics completely opposite to those of the low-emissivity shell yarn, the intelligent thermal radiation modulated superstructure fiber provided by this invention can be obtained. The intelligent thermal radiation modulated superstructure fiber provided by this invention can achieve different infrared emissivity under the action of external force to achieve the result of high-performance dynamic radiation modulation rate.

[0028] 2. The method for preparing intelligent thermal radiation-controlled superstructured fibers provided by this invention adopts a covered yarn preparation process, which is different from other methods for preparing radiation-controlled fibers such as magnetron sputtering, electrospinning, and chemical deposition. This method can effectively reduce the cost of raw materials, simplify the entire process, improve production efficiency, provide a guarantee for continuous large-scale and scaled-up production lines, meet the needs of industrial applications, and enhance the competitiveness of products in the market.

[0029] 3. The fabric made of intelligent thermal radiation-regulated superstructure fibers provided by this invention can form a large area of ​​fabric through simple and low-cost weaving, knitting, and braiding processes. It can not only continue the high dynamic infrared regulation rate of superstructure fibers and realize intelligent temperature regulation, but also has good mechanical properties and wearability, including breathability, moisture permeability, and washability. Attached Figure Description

[0030] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0031] Figure 1 This is a schematic diagram of the structure of the intelligent thermal radiation-regulated superstructure fiber provided by the present invention;

[0032] Figure 2 This is a photograph of the intelligent thermal radiation-regulated superstructure fiber prepared in Example 1 of the present invention;

[0033] Figure 3 A photograph of the intelligent thermal radiation-controlled fabric prepared in Example 1 of this invention;

[0034] Figure 4 The images show the spectra of the intelligent radiation-thermal modulated fabric prepared in Example 1 of this invention under different strains.

[0035] Figure 5 The images show the spectra of the intelligent radiation-thermal modulated fabric prepared in Example 2 of this invention under different strains.

[0036] Figure 6 A photograph of the intelligent thermal radiation-controlled fabric prepared in Example 3 of this invention;

[0037] Figure 7 The images show the spectra of the heat-regulating fabric prepared in Example 3 of this invention under different strains.

[0038] Figure 8 The images show the spectra of the heat-regulating fabric prepared in Comparative Example 1 of this invention under different strains.

[0039] Figure 9The images show the spectra of the heat-regulating fabric prepared in Comparative Example 2 of this invention under different strains.

[0040] Figure 10 The images show the spectra of the heat-regulating fabric prepared in Comparative Example 3 of this invention under different strains.

[0041] In the diagram: 1 - High emission core yarn; 2 - Low emission shell yarn. Detailed Implementation

[0042] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0043] Reference Figure 1 As shown, the present invention provides a smart thermal radiation-controlled superstructure fiber, comprising a high-emissivity core layer yarn located in the inner layer and a low-emissivity shell layer yarn located in the outer layer. It should be noted that high emissivity and low emissivity are relative concepts here, that is, the core layer yarn has a higher infrared emissivity compared with the shell layer yarn.

[0044] The high-emissivity core yarn includes one or more of high-emissivity polymer yarn and high-emissivity polymer-inorganic micro-nano particle composite yarn. Specifically, the high-emissivity polymer yarn or the high-emissivity polymer-inorganic micro-nano particle composite yarn is prepared by processes such as melt spinning, wet spinning, and electrospinning.

[0045] The low-emission shell yarn includes one or more of metal filaments, metal-coated yarns, and conductive solution-coated yarns. The low-emission metal yarn core layer yarn can be directly composed of metal filaments; or it can be prepared by spraying a metal coating onto the surface of the substrate yarn through evaporation deposition or chemical deposition; or it can be prepared by coating the substrate yarn with a conductive solution coating through a coating process.

[0046] The low-emissivity shell yarn has spacing-dependent resonant coupling absorption and low infrared emissivity. After being rotated and wrapped with the high-emissivity core yarn, which has a high infrared emissivity and infrared emission characteristics that are completely opposite to those of the low-emissivity shell yarn, the intelligent thermal radiation modulated superstructure fiber provided by this invention can be obtained. Under the action of external force, it can achieve different changes in infrared emissivity to achieve the result of high-performance dynamic radiation modulation rate.

[0047] In one embodiment, the high-emission polymer includes one or more of polyurethane (PU), polydimethylsiloxane (PDMS), styrene-ethylene-butene-styrene block copolymer (SEBS), polypropylene terephthalate (PTT), polyamide (PA), polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyolefin elastomer (POE), and thermoplastic polyamide elastomer (TPAE). The high-emission polymer enhances the infrared absorption of the superstructure fiber by means of vibrational and rotational transitions of chemical bonds or functional groups in its molecular structure.

[0048] The inorganic micro-nanoparticles include one or more of the following: aluminum oxide (Al2O3), titanium dioxide (TiO2), silicon dioxide (SiO2), zinc oxide (ZnO), barium sulfate (BaSO4), silicon carbide (SiC), silicon nitride (Si3N4), zinc sulfide (ZnS), magnesium oxide (MgO), iron oxide (Fe2O3), boron nitride (BN), barium carbonate (BaCO3), and aluminum silicate (Al2SiO5). The inorganic micro-nanoparticles with wide band gaps enhance the infrared absorption of the superstructure fibers due to phonon-polaritonic resonance.

[0049] The metal filaments include one or more of the following: silver wire, copper wire, gold wire, aluminum wire, titanium wire, tungsten wire, platinum wire, and stainless steel wire.

[0050] The metal-coated yarn comprises one or more of the following: silver layer, gold layer, copper layer, aluminum layer, and platinum layer.

[0051] The conductive solution-coated yarn includes one or more of poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid, polyaniline, polypyrrole, liquid metal, and transition metal carbon / nitrogen / carbonitride.

[0052] In one embodiment, the diameter of the high-emissivity core yarn is 50μm-2000μm. If the diameter of the prepared high-emissivity core yarn is too small or too large, it will result in poor wearability, thereby affecting the performance of the intelligent thermal radiation regulation superstructure fiber. The particle size range of the inorganic micro-nano particles is 0.01μm-30μm. If the particle size is too large or too small, it will reduce the infrared emission performance. The volume ratio of the high-emissivity polymer to the inorganic micro-nano particles is 1:(0.02-1).

[0053] In one embodiment, the diameter of the low-emission shell yarn is 1μm-1000μm, and the thickness of both the metal coating and the conductive solution coating is 0.01μm-1μm.

[0054] The second aspect of the present invention provides a method for preparing the above-mentioned intelligent thermal radiation-controlled superstructure fiber, comprising the following steps: using a high-emissivity core yarn as an axis, rotating and wrapping a low-emissivity shell yarn around the high-emissivity core yarn, and then collecting it through an automatic winding device to obtain the intelligent thermal radiation-controlled superstructure fiber.

[0055] This invention provides a method for preparing intelligent thermal radiation-regulated superstructured fibers. The method employs a covered yarn preparation process, which can effectively reduce the cost of raw materials, simplify the entire process, improve production efficiency, and provide a guarantee for continuous, large-scale, and scaled-up production lines. This meets the needs of industrial applications and enhances the competitiveness of products in the market.

[0056] In one embodiment, the rotational wrapping speed of the low-emissivity shell yarn is 100rpm-3000rpm, and the collection speed of the automatic winding device, i.e. the collection speed of the high-emissivity core yarn, is 50mm / min-300mm / min. Both the rotational wrapping speed and the collection speed of the automatic winding device will affect the density of the superstructured fiber formed by the final wrapping. Too dense or too sparse will lead to a reduction in the range of infrared emissivity regulation.

[0057] In one embodiment, the method further includes coating or covering the smart thermal radiation-controlled superstructure fiber with colored pigments to obtain the colored smart thermal radiation-controlled superstructure fiber.

[0058] In one embodiment, the colored pigment comprises an infrared transparent pigment and a polymer;

[0059] The infrared transparent pigment includes zinc oxide (ZnO), barium fluoride (BaF2), iron oxide (Fe2O3), nano-silicon powder (Si), and Prussian blue (C). 18 Fe7N 18 One or more of the following: goethite (FeO(OH)) and zinc selenide (ZnSe);

[0060] The polymer includes one or more of polyamide 6 (PA6), polyamide 66 (PA66), polyethylene (PE), polymethylpentene (TPX), polytetrafluoroethylene (PTFE), polymethyl methacrylate (PMMA), or styrene-ethylene-butene-styrene block copolymer (SEBS);

[0061] The mass mixing ratio of the infrared transparent pigment to the polymer is (0.2-15):1.

[0062] A third aspect of the present invention also provides a fabric comprising the above-mentioned intelligent thermal radiation-regulated superstructure fiber and other fibers, obtained by weaving, knitting, or braiding, wherein:

[0063] The intelligent thermal radiation-regulated superstructure fiber is used as both warp and weft yarns; or the intelligent thermal radiation-regulated superstructure fiber is used as one type of warp and weft yarn, and the other fiber is used as the other type of warp and weft yarn.

[0064] In one embodiment, the other fibers include one or more of metal yarns, cotton yarns, linen yarns, and polyester yarns. It should be noted that the other fibers are not limited to metal yarns. Those skilled in the art can select appropriate fibers as other fibers according to the needs of the final fabric and weave them into a fabric with intelligent thermal radiation-regulated superstructure fibers in the manner described above. All selected fibers are within the protection scope of this invention.

[0065] The present invention will be further described in detail below through embodiments:

[0066] Example 1

[0067] This embodiment provides a smart thermal radiation-regulated superstructure fiber, its preparation method, and a fabric.

[0068] Composition of intelligent thermal radiation-regulated superstructure fiber: high-emissivity core layer yarn is a composite yarn of polyurethane (PU) and alumina (Al2O3), and low-emissivity shell layer yarn is silver yarn;

[0069] A method for preparing intelligent thermal radiation-controlled superstructured fibers: Polyurethane (PU) polymer and alumina (Al2O3) were mixed at a volume ratio of 1:0.5, with the alumina particle size being 10 μm. A high-emissivity core layer yarn with a diameter of 200 μm was prepared by melt spinning. A silver yarn with a diameter of 30 μm was selected as the low-emissivity shell layer yarn. The rotational wrapping speed of the low-emissivity shell layer yarn was set to 1400 rpm, and the collection speed of the high-emissivity core layer yarn was set to 50 mm / min. This yielded a continuously and uniformly coated intelligent thermal radiation-controlled superstructured fiber based on a core-shell structure. Figure 2 As shown;

[0070] Fabric composition and preparation method: Using the intelligent thermal radiation regulation superstructure fiber obtained in this embodiment as the weft yarn and silver yarn as the warp yarn, warp and weft weaving is performed to obtain a large-area intelligent thermal radiation regulation fabric, such as... Figure 3 As shown;

[0071] Fabric Testing: The reflectance and transmittance of the fabric at different wavelengths were measured using a Fourier transform infrared spectroscopy (FTIR) instrument. Tension was applied to both ends of the fabric to obtain deformation. By calculating emissivity = 1 - reflectance - transmittance, the optical performance diagram of the fabric under different strains provided in this embodiment can be obtained. (Refer to...) Figure 4 As shown, in this embodiment, the infrared emissivity modulation range of the fabric is greater than 0.5 under 0% and 100% strain.

[0072] Example 2

[0073] This embodiment provides a smart thermal radiation-regulated superstructure fiber, its preparation method, and a fabric.

[0074] Composition of intelligent thermal radiation-regulated superstructure fiber: high-emissivity core layer yarn is styrene-ethylene-butene-styrene block copolymer (SEBS) yarn, and low-emissivity shell layer yarn is silver yarn;

[0075] Preparation method of intelligent thermal radiation-regulated superstructure fiber: Styrene-ethylene-butene-styrene block copolymer (SEBS) is used to prepare a high-emission core layer yarn with a diameter of 300 μm by wet spinning. A silver yarn with a diameter of 30 μm is selected as a low-emission shell layer yarn. The rotational wrapping speed of the low-emission shell layer yarn is set to 1500 rpm, and the collection speed of the high-emission core layer yarn is set to 40 mm / min. A continuously and uniformly wrapped intelligent thermal radiation-regulated superstructure fiber based on the core-shell structure is obtained.

[0076] Fabric composition and preparation method: Using the intelligent thermal radiation regulation superstructure fiber obtained in this embodiment as the weft yarn and silver yarn as the warp yarn, warp and weft weaving is performed to obtain a large-area intelligent thermal radiation regulation fabric, such as... Figure 3 As shown;

[0077] Fabric Testing: The reflectance and transmittance of the fabric at different wavelengths were measured using a Fourier transform infrared spectroscopy (FTIR) instrument. Tension was applied to both ends of the fabric to obtain deformation. By calculating emissivity = 1 - reflectance - transmittance, the optical performance diagram of the fabric under different strains provided in this embodiment can be obtained. (Refer to...) Figure 5 As shown, in this embodiment, the infrared emissivity modulation range of the fabric is greater than 0.5 under 0% and 100% strain.

[0078] Example 3

[0079] This embodiment provides a smart thermal radiation-regulated superstructure fiber, its preparation method, and a fabric.

[0080] Composition of intelligent thermal radiation-regulated superstructure fiber: high-emissivity core layer yarn is a composite yarn of polyurethane (PU) and alumina (Al2O3), and low-emissivity shell layer yarn is silver yarn;

[0081] A method for preparing intelligent thermal radiation-controlled superstructured fibers: Polyurethane (PU) polymer and alumina (Al2O3) were mixed at a volume ratio of 1:0.5, with the alumina particle size being 10 μm. A high-emissivity core layer yarn with a diameter of 200 μm was prepared by melt spinning. A silver yarn with a diameter of 30 μm was selected as the low-emissivity shell layer yarn. The rotational wrapping speed of the low-emissivity shell layer yarn was set to 1400 rpm, and the collection speed of the high-emissivity core layer yarn was set to 50 mm / min. This yielded a continuously and uniformly coated intelligent thermal radiation-controlled superstructured fiber based on a core-shell structure. Figure 6 As shown;

[0082] Preparation method of colored intelligent thermal radiation regulated superstructure fiber: Infrared transparent pigment barium fluoride and polymer polyethylene are mixed in a mass ratio of 1:3 and coated onto the intelligent thermal radiation regulated superstructure fiber in this embodiment to obtain white intelligent thermal radiation regulated superstructure fiber.

[0083] Fabric composition and preparation method: Using the white intelligent thermal radiation regulation superstructure fiber obtained in this embodiment as the weft yarn and silver yarn as the warp yarn, warp and weft weaving is performed to obtain a large-area intelligent thermal radiation regulation fabric, such as... Figure 6 As shown;

[0084] Fabric Testing: The reflectance and transmittance of the fabric at different wavelengths were measured using a Fourier transform infrared spectroscopy (FTIR) instrument. Tension was applied to both ends of the fabric to obtain deformation. By calculating emissivity = 1 - reflectance - transmittance, the optical performance diagram of the fabric under different strains provided in this embodiment can be obtained. (Refer to...) Figure 7 As shown, the infrared emissivity modulation range of the fabric in this embodiment is greater than 0.4 under 0% and 100% strain.

[0085] Comparative Example 1

[0086] This comparative example provides a smart thermal radiation-regulated superstructure fiber, its preparation method, and a fabric.

[0087] Silver yarn with a diameter of 1500 μm was selected as the low-emission shell yarn, and the remaining components and steps were the same as in Example 1.

[0088] Reference Figure 8 As shown, after applying the same strain, the increase in the diameter of the low-emissivity shell yarn leads to a decrease in resonant coupling absorption, resulting in a reduction in the amplitude of infrared emissivity modulation.

[0089] Comparative Example 2

[0090] This comparative example provides a smart thermal radiation-regulated superstructure fiber, its preparation method, and a fabric.

[0091] Polyurethane (PU) polymer and alumina (Al2O3) were mixed in a volume ratio of 1:2. The particle size of the alumina was 60 μm. High-emissivity core yarn was prepared by melt spinning. The remaining components and steps were the same as in Example 1.

[0092] Reference Figure 9 As shown, after applying the same strain, the infrared emissivity modulation amplitude decreases due to the reduced high emissivity of the core yarn.

[0093] Comparative Example 3

[0094] This comparative example provides a smart thermal radiation-regulated superstructure fiber, its preparation method, and a fabric.

[0095] In the preparation method of intelligent thermal radiation regulated superstructure fiber, the rotational wrapping speed of the low-emission shell yarn is set to 50 rpm, the collection speed of the high-emission core yarn is 500 mm / min, and the remaining components and steps are the same as in Example 1.

[0096] Reference Figure 10 As shown, after applying the same strain, the infrared emissivity modulation amplitude decreases due to the loose fiber coating of the obtained intelligent thermal radiation-controlled superstructure.

[0097] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A smart thermal radiation-regulated superstructure fiber, characterized in that, This includes high-emissivity core yarns located in the inner layer and low-emissivity shell yarns located in the outer layer; The high-emissivity core layer yarn includes one or more of high-emissivity polymer yarn and high-emissivity polymer-inorganic micro-nano particle composite yarn. The low-emission shell yarn includes one or more of the following: metal filaments, metal-coated yarns, and conductive solution-coated yarns. The intelligent thermal radiation-regulated superstructure fiber is prepared by the following method: Using a high-emissivity core yarn as the axis, a low-emissivity shell yarn is rotated and wrapped around the high-emissivity core yarn, and then collected by an automatic winding device to obtain intelligent thermal radiation-regulated superstructure fiber. The rotation speed of the low-emissivity shell yarn is 100rpm-3000rpm, and the collection speed of the automatic winding device is 50mm / min-300mm / min. The intelligent thermal radiation-controlled superstructure fiber can achieve different infrared emissivity changes under the action of external force.

2. The intelligent thermal radiation-regulated superstructure fiber according to claim 1, characterized in that, The high-emission polymer includes one or more of the following: polyurethane, polydimethylsiloxane, styrene-ethylene-butene-styrene block copolymer, polypropylene terephthalate, polyamide, polyethylene, polypropylene, polyethylene terephthalate, polybutylene terephthalate, polyolefin elastomer, and thermoplastic polyamide elastomer. The inorganic micro / nano particles include one or more of the following: aluminum oxide, titanium dioxide, silicon dioxide, zinc oxide, barium sulfate, silicon carbide, silicon nitride, zinc sulfide, magnesium oxide, iron oxide, boron nitride, barium carbonate, and aluminum silicate. The metal filaments include one or more of the following: silver wire, copper wire, gold wire, aluminum wire, titanium wire, tungsten wire, platinum wire, and stainless steel wire. The metal-coated yarn comprises one or more of the following: silver layer, gold layer, copper layer, aluminum layer, and platinum layer. The conductive solution-coated yarn includes one or more of poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid, polyaniline, polypyrrole, liquid metal, and transition metal carbon / nitrogen / carbonitride.

3. The intelligent thermal radiation-regulated superstructure fiber according to claim 1, characterized in that, The diameter of the high-emissivity core yarn is 50μm-2000μm, the particle size of the inorganic micro-nano particles is 0.01μm-30μm, and the volume ratio of the high-emissivity polymer to the inorganic micro-nano particles is 1:(0.02-1).

4. The intelligent thermal radiation-regulated superstructure fiber according to claim 1, characterized in that, The diameter of the low-emission shell yarn is 1μm-1000μm, and the thickness of both the metal coating and the conductive solution coating is 0.01μm-1μm.

5. A method for preparing intelligent thermal radiation-regulated superstructured fibers as described in any one of claims 1-4, characterized in that, Also includes: Colored pigments can be coated or encapsulated on the outside of the intelligent thermal radiation-regulated superstructure fiber to obtain colored intelligent thermal radiation-regulated superstructure fiber.

6. The preparation method according to claim 5, characterized in that, The colored pigments include infrared transparent pigments and polymers; The infrared transparent pigment includes one or more of zinc oxide, barium fluoride, iron oxide, nano-silica powder, Prussian blue, goethite, and zinc selenide; The polymer includes one or more of polyamide 6, polyamide 66, polyethylene, polymethylpentene, polytetrafluoroethylene, polymethyl methacrylate, or styrene-ethylene-butene-styrene block copolymer; The mass mixing ratio of the infrared transparent pigment to the polymer is (0.2-15):

1.

7. A fabric, characterized in that, The intelligent thermal radiation-regulated superstructure fiber as described in any one of claims 1-4 is obtained by weaving, knitting, or braiding, or by weaving the intelligent thermal radiation-regulated superstructure fiber and other fibers, wherein: The intelligent thermal radiation-regulated superstructure fiber is used as both warp and weft yarns; or the intelligent thermal radiation-regulated superstructure fiber is used as one type of warp and weft yarn, and the other fiber is used as the other type of warp and weft yarn.

8. The fabric according to claim 7, characterized in that, The other fibers include one or more of the following: metallic yarn, cotton yarn, linen yarn, and polyester yarn.

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