Textile with light-heat conversion function, preparation method and application

Abstract

This invention relates to a textile with photothermal conversion function, its preparation method, and its application. Thioacetamide is added to deionized water to obtain a supersaturated solution, which is stirred at 20–50°C until the solution becomes clear. The solution is left at room temperature to allow a large amount of crystals to precipitate. Tungsten hexachloride is added, and the mixture is stirred to obtain a tungsten disulfide hollow sphere precursor solution. A photothermal conversion material based on tungsten disulfide hollow spheres is then prepared via a hydrothermal reaction. This material is then applied to textiles using a hot air padding method to obtain a photothermal conversion textile based on tungsten disulfide hollow spheres. This invention successfully prepares tungsten disulfide hollow spheres using a hydrothermal synthesis method. These spheres exhibit good light absorption in the near-infrared band, and the textiles exhibit excellent photothermal conversion performance under natural light irradiation. The preparation process of this invention is simple, flexible, safe, and easy to produce, which is beneficial for industrial production and the further application of inorganic nanomaterials in the field of smart textiles.

Description

Technical Field

[0001] This invention belongs to the field of functional material preparation and application technology, and relates to a textile with photothermal conversion function, its preparation method and application. Background Technology

[0002] The sun radiates energy by emitting ultraviolet (UV), visible, and infrared (IR) light, each carrying photons with different vibration frequencies. When these photons encounter an object, some of them are absorbed, thus heating the object. This energy transfer from light to heat occurs extensively in physical, chemical, and biological reactions; it is one of the most fundamental processes in nature. This light-to-heat conversion process is called photothermal conversion, and materials can act as light absorbers, effectively converting light energy into heat. The photothermal properties of photoexcited materials are mainly determined by two key inherent characteristics: light collection capability and photothermal conversion efficiency (see reference: [reference needed]). Chem Rev. 2023, 123, 6891).

[0003] With the rapid development of advanced nanotechnology and materials science, photothermal materials have been developed into nanomaterials and further designed into functional nanostructures. Similar to the classic bulk case, photothermal effects can be commonly observed in many nanomaterials, including metallic nanostructures (see reference: Chem. Rev. 2019, 119 , 8087), semiconductors (see reference: Acc. Chem. Res. 2017, 50 , 2529), carbon-based nanomaterials (see reference: Chem. Rev. 2019, 119 , 9559), organic polymers (see reference: Chem. Soc. Rev. 2018, 47 , 2280) and two-dimensional transition metal nanomaterials (see reference: Adv. Sci. 2020, 7 (e.g., 1902236). Compared to bulk structures, well-designed nanomaterials can exhibit unique thermal, optical, and electronic properties by adjusting their shape, size, composition, and surrounding environment, thus providing more possibilities for tuning their photothermal properties. In recent years, two-dimensional transition metal chalcogenides (TMDs) MeX2 (Me = transition metal; X = chalcogenide) have been extensively studied due to their excellent properties, such as high thermal conductivity, electrical conductivity, stability, and tunable band gap (see reference: ). ACS Appl Mater Interfaces(2021, 13, 48988), it can be applied to electronic and optoelectronic devices such as transistors, solar cells, light-emitting diodes, and gas sensors. For photothermal effects, MoS2, WS2, and TiS2 are promising candidates because they are low-cost, easy to synthesize, and have suitable bandgap energies. However, the combination of WS2 hollow spheres with textiles and their application in the photothermal field have not yet been reported. Summary of the Invention

[0004] This invention addresses the shortcomings of existing applications combining textiles and transition metal materials in the photothermal field. It provides a low-cost, simple-to-prepare textile with photothermal conversion function, a preparation method, and applications. It enables the preparation of hollow tungsten disulfide spheres with high photothermal conversion efficiency and uniform morphology, and their combination with textiles, and further applications in the field of photothermal conversion.

[0005] The technical solution to achieve the objective of this invention is to provide a method for preparing a textile with photothermal conversion function, comprising the following steps: (1) Thioacetamide with a concentration of 200-350 g / L is dissolved in deionized water and stirred at a temperature of 30-60 °C to obtain a supersaturated solution of thioacetamide. The solution is cooled at room temperature for 12-24 h until crystals precipitate in the solution to obtain a thioacetamide crystal solution. Then, 100-200 g / L of metal-based tungsten hexachloride powder is added and stirred until the solution turns coffee color to obtain a tungsten disulfide hollow sphere precursor solution. The precursor solution is transferred to a polytetrafluoroethylene stainless steel reactor and hydrothermally reacted at a temperature of 180-250 °C for 10-24 h. After cooling, washing and drying, a tungsten disulfide hollow sphere with photothermal conversion function is obtained. (2) The hollow tungsten disulfide spheres obtained in step (1) are used to finish the textiles to obtain a photothermal conversion textile material.

[0006] The present invention discloses a method for preparing a textile with photothermal conversion function, wherein hollow tungsten disulfide spheres with photothermal conversion function are used to finish the textile using a hot air rolling baking process.

[0007] A preferred embodiment of the present invention is as follows: Tungsten disulfide hollow spheres are ultrasonically dispersed in deionized water to obtain a dispersion with a tungsten disulfide hollow sphere concentration of 2.5–5 g / L; the textile is treated with a two-dip and two-roll process with a roll-off rate of 80–120%, and then baked under vacuum conditions at a temperature of 60–90 °C for 8–12 h to obtain tungsten disulfide hollow spheres / textiles with photothermal conversion function.

[0008] The textiles described in this invention include silk and cotton fabrics.

[0009] The technical solution of the present invention also includes obtaining a textile with photothermal conversion properties by the above preparation method.

[0010] The textile with photothermal conversion properties described in this invention can be used as a flexible wearable material.

[0011] Compared with modern technology, the beneficial effects of this invention are as follows: This invention provides a textile with photothermal conversion function, its preparation method, and its application, achieving an effective combination of textiles and inorganic nanomaterials. Through a simple hydrothermal reaction, hollow tungsten disulfide spheres with excellent photothermal properties were successfully prepared; the combination of the hollow tungsten disulfide spheres and textiles was successfully achieved through a hot air rolling and baking process. This structure provides a huge specific surface area, giving it excellent application potential in the field of photothermal conversion. Attached Figure Description

[0012] Figure 1 Scanning electron microscope (SEM) images of tungsten disulfide hollow spheres and tungsten disulfide hollow sphere / cotton fabric prepared in Example 1 of the present invention; Figure 2 The X-ray diffraction (XRD) pattern of hollow tungsten disulfide spheres prepared in Example 1 of the present invention; Figure 3 Fourier transform infrared (FT-IR) spectra of tungsten disulfide hollow spheres, cotton fabric, and tungsten disulfide hollow sphere / cotton fabric prepared in Example 1 of the present invention; Figure 4 The UV-Vis-NIR absorption spectra of cotton fabric and tungsten disulfide hollow spheres / cotton fabric prepared in Example 1 of the present invention are shown. Figure 5 The temperature rise curve of tungsten disulfide hollow spheres / cotton fabric prepared in Example 1 of the present invention under simulated light source irradiation is shown. Detailed Implementation

[0013] The technical solution of this invention will be further illustrated by the following figures and embodiments. Example 1

[0014] 2.0 g of thioacetamide was added to 20 mL of deionized water and stirred in a water bath at 20 °C for 10 min until all the thioacetamide was dissolved, resulting in a supersaturated solution of thioacetamide. The solution was then cooled at room temperature for 12 h until a large amount of crystals precipitated, yielding a crystalline solution of thioacetamide.

[0015] The obtained thioacetamide crystal solution was stirred at 300 r / min, and 1.0 g of metal-based tungsten hexachloride was added to it. It was observed that the thioacetamide crystal solution immediately turned purple. After stirring for 1 h, the solution changed from purple to coffee color, and a tungsten disulfide hollow sphere precursor solution was obtained.

[0016] The tungsten disulfide hollow sphere precursor solution was transferred to a 50 mL polytetrafluoroethylene stainless steel reactor. The hydrothermal reaction was carried out at 180 °C for 24 h. After washing three times with ethanol, the mixture was vacuum dried at 60 °C for 9 h to obtain a photothermal conversion material based on tungsten disulfide hollow spheres.

[0017] 0.5 g of hollow tungsten disulfide spheres were ultrasonically dispersed in 100 mL of deionized water to obtain a tungsten disulfide hollow sphere dispersion. This dispersion was then processed using a hot air rolling and baking process (two dips and two rolls, with a roll-off rate of 100%) to achieve a size of 6 × 4 cm. 2 The tungsten disulfide hollow spheres / cotton fabric with photothermal conversion function were obtained by vacuum drying at 70 °C for 10 h on cotton fabric.

[0018] See appendix Figure 1 The following are scanning electron microscope (SEM) images of the preparation of tungsten disulfide hollow spheres and tungsten disulfide / cotton fabric in this embodiment: (a) The image shows that the tungsten disulfide hollow spheres prepared by hydrothermal synthesis have a smooth surface, uniform size, and spherical shape. The small holes visible on the surface in the image prove that the prepared tungsten disulfide has a hollow spherical structure. As can be seen from (b), tungsten disulfide successfully covers the surface of cotton fabric, thereby giving the cotton fabric excellent photothermal properties.

[0019] See appendix Figure 2 The X-ray diffraction (XRD) pattern of the hollow tungsten disulfide spheres prepared in this embodiment is shown below. The peaks are basically consistent with those of the standard card (JCPDS:08-0237), proving that the prepared hollow tungsten disulfide spheres are in the 2H phase.

[0020] See appendix Figure 3 The following are Fourier transform infrared (FT-IR) spectra of the tungsten disulfide hollow spheres, cotton fabric, and tungsten disulfide hollow sphere / cotton fabric prepared in this embodiment: where, at 671 cm⁻¹... -1 The characteristic peak that appears can be attributed to the WS bond, 3298 cm⁻¹ -1 The peak values ​​that appear can be assigned to the stretching vibrations of hydroxyl groups in cotton fabrics.

[0021] See appendix Figure 4 The graph shows a comparison of the UV-Vis spectra of the cotton fabric and the tungsten disulfide hollow sphere / cotton fabric prepared in this embodiment. Figure 4 It can be seen that cotton fabrics exhibit very low absorption intensity in the near-infrared band, while the absorption intensity of tungsten disulfide hollow spheres / cotton fabrics treated with functionalized tungsten disulfide hollow spheres is greatly increased, proving that they have excellent light absorption capabilities.

[0022] See appendix Figure 5Figure 1 shows the temperature rise curve of the tungsten disulfide hollow spheres / cotton fabric prepared in this embodiment under simulated light source irradiation. Under simulated light source irradiation with a power density of 0.25 sun, the tungsten disulfide hollow spheres / cotton fabric rose from an initial skin temperature of 25.2 °C to 44.5 °C. Due to the thermal convection effect, the corresponding temperature rise rate subsequently decreased. When the power density of the simulated light source was increased (0.5, 0.75, 1.0, and 1.5 sun), the temperature of the tungsten disulfide hollow spheres / cotton fabric stabilized at 50.1, 54.5, 59.7, and 70 °C, respectively, indicating that the prepared multifunctional fiber exhibits efficient photothermal performance. Example 2

[0023] 2.5 g of thioacetamide was added to 30 mL of deionized water and stirred in a water bath at 30 °C for 20 min until all the thioacetamide was dissolved, resulting in a supersaturated thioacetamide solution. This solution was cooled at room temperature for 18 h until a large amount of crystals precipitated, yielding a thioacetamide crystal solution. Next, the obtained thioacetamide crystal solution was stirred at 400 r / min, and 1.5 g of tungsten hexachloride was added. The thioacetamide crystal solution immediately turned purple, and after stirring for 1.5 h, the solution changed from purple to brown, yielding a tungsten disulfide hollow sphere precursor solution. Finally, the tungsten disulfide hollow sphere precursor solution was transferred to a 50 mL polytetrafluoroethylene stainless steel reactor, and the hydrothermal reaction was carried out at 220 °C for 18 h. After washing four times with ethanol and vacuum drying at 60 °C for 12 h, a photothermal conversion material based on tungsten disulfide hollow spheres was obtained.

[0024] 1.0 g of hollow tungsten disulfide spheres were ultrasonically dispersed in 400 mL of deionized water to obtain a tungsten disulfide hollow sphere dispersion. This dispersion was then shaped to a size of 7 × 5 cm using a hot air rolling and baking method (two dips and two rolls, roll yield: 80%). 2 The tungsten disulfide hollow spheres / cotton fabric with photothermal conversion properties were obtained by vacuum drying at 80 °C for 12 h on cotton fabric. Example 3

[0025] 3.0 g of thioacetamide was added to 35 mL of deionized water and stirred in a water bath at 40 °C for 30 min until all the thioacetamide was dissolved, resulting in a supersaturated thioacetamide solution. This solution was cooled at room temperature for 24 h until a large amount of crystals precipitated, yielding a thioacetamide crystal solution. Next, the obtained thioacetamide crystal solution was stirred at 500 r / min, and 2.0 g of tungsten hexachloride was added. The thioacetamide crystal solution immediately turned purple, and after stirring for 2 h, the solution changed from purple to brown, yielding a tungsten disulfide hollow sphere precursor solution. Finally, the tungsten disulfide hollow sphere precursor solution was transferred to a 50 mL polytetrafluoroethylene stainless steel reactor, and the hydrothermal reaction was carried out at 250 °C for 12 h. After washing six times with ethanol and vacuum drying at 60 °C for 12 h, a photothermal conversion material based on tungsten disulfide hollow spheres was obtained.

[0026] 1.5 g of hollow tungsten disulfide spheres were ultrasonically dispersed in 200 mL of deionized water to obtain a hollow tungsten disulfide sphere dispersion. This dispersion was then shaped to a size of 8 × 6 cm using a hot air rolling and baking method (two dips and two rolls, 100% slurry yield). 2 On cotton fabric, tungsten disulfide hollow spheres / cotton fabric with photothermal conversion properties were obtained by vacuum drying at 90 ℃ for 8 h. Example 4

[0027] 3.0 g of thioacetamide was added to 20 mL of deionized water and stirred in a water bath at 40 °C for 20 min until all the thioacetamide was dissolved, resulting in a supersaturated thioacetamide solution. This solution was cooled at room temperature for 12 h until a large amount of crystals precipitated, yielding a thioacetamide crystal solution. Next, the obtained thioacetamide crystal solution was stirred at 600 r / min, and 1.7 g of tungsten hexachloride was added. The thioacetamide crystal solution immediately turned purple, and after stirring for 2 h, the solution changed from purple to brown, yielding a tungsten disulfide hollow sphere precursor solution. Finally, the tungsten disulfide hollow sphere precursor solution was transferred to a 50 mL polytetrafluoroethylene stainless steel reactor, and the hydrothermal reaction was carried out at 200 °C for 24 h. After washing five times with ethanol and vacuum drying at 60 °C for 12 h, a photothermal conversion material based on tungsten disulfide hollow spheres was obtained.

[0028] 1.0 g of hollow tungsten disulfide spheres were ultrasonically dispersed in 250 mL of deionized water to obtain a tungsten disulfide hollow sphere dispersion. This dispersion was then shaped to a size of 6 × 4 cm using a hot air rolling and baking method (two dips and two rolls, roll yield: 90%). 2 The tungsten disulfide hollow spheres / cotton fabric with photothermal conversion properties were obtained by vacuum drying at 90 °C for 8 h on cotton fabric.

Claims

1. A method for preparing a textile with photothermal conversion function, characterized in that... Includes the following steps: (1) Dissolve thioacetamide in deionized water and stir at a temperature of 30-60 °C to obtain a supersaturated solution of thioacetamide. Cool at room temperature for 12-24 h until crystals precipitate in the solution to obtain a thioacetamide crystal solution. Then add 100-200 g / L of metal-based tungsten hexachloride powder and stir until the solution turns coffee color to obtain a tungsten disulfide hollow sphere precursor solution. The precursor solution was transferred to a polytetrafluoroethylene stainless steel reactor and hydrothermally reacted at a temperature of 180–250 °C for 10–24 h. After cooling, washing and drying, a hollow tungsten disulfide sphere with photothermal conversion function was obtained. (2) The hollow tungsten disulfide spheres obtained in step (1) are used to finish the textiles to obtain a photothermal conversion textile material.

2. The method for preparing a textile with photothermal conversion function according to claim 1, characterized in that: Tungsten disulfide hollow spheres with photothermal conversion function are used to finish textiles using a hot air rolling and baking process.

3. A method for preparing a textile with photothermal conversion function according to claim 1 or 2, characterized in that: Tungsten disulfide hollow spheres were ultrasonically dispersed in deionized water to obtain a dispersion with a concentration of 2.5–5 g / L. The textile was treated with a two-dip and two-roll process with a roll-off rate of 80–120%, and then baked under vacuum at a temperature of 60–90 °C for 8–12 h to obtain tungsten disulfide hollow spheres / textiles with photothermal conversion function.

4. The method for preparing a textile with photothermal conversion function according to claim 1, characterized in that: The textiles mentioned include silk and cotton fabrics.

5. A textile with photothermal conversion properties is obtained by the preparation method according to claim 1.

6. The textile with photothermal conversion properties as described in claim 5 is used as a flexible wearable material.

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