Preparation method of a raschel blanket with energy storage and photo-thermal conversion

Abstract

The present application relates to the field of textile, especially to a preparation method of a raschel blanket with energy storage and photo-thermal conversion function, comprising selecting silver nanowire / nanoporous polyethylene composite fiber as the pile yarn and polyester as the base yarn, and preparing the raschel blanket with energy storage and photo-thermal conversion function by a raschel warp knitting machine, wherein the silver nanowire / nanoporous polyethylene composite fiber is prepared by immersing the nanoporous polyethylene fiber into silver nanowire ink, impregnating, drying and then hot pressing, the present application can solve the problems of poor combination of components, poor stability and other problems of the existing photo-thermal conversion phase change energy storage material, realize the synergistic effect of photo-thermal conversion and phase change energy storage, and has good practical significance in the field of energy storage and photo-thermal conversion textiles.

Description

Technical Field

[0001] This invention relates to the textile field, and in particular to a method for preparing a Raschel blanket with energy storage and photothermal conversion. Background Technology

[0002] As people's living standards improve, they have higher demands for a better living environment. However, with the continuous development of modern society, energy shortages are becoming increasingly serious and energy costs are rising. Solar energy, as an inexhaustible and renewable clean energy source, is of great significance to human sustainable development. However, visible light, which accounts for about 50% of solar energy, has no direct thermal effect and requires photothermal conversion for heat utilization. Solar thermal utilization systems integrate heat collection, storage, and supply functions, and are an important pathway for solar energy utilization. These systems typically utilize light-collecting materials to absorb near-infrared light from sunlight that can directly generate heat, and then store the thermal energy through phase change energy storage materials. Near-infrared light, especially the 700nm–900nm range, accounts for about 40% of sunlight that can directly generate heat. Therefore, researching and developing new types of Raschel blankets for energy storage and photothermal conversion plays a crucial role in reducing electricity consumption and meeting individual needs.

[0003] For the sustainable development of human society, photothermal conversion energy storage materials are currently a research hotspot in solar thermal utilization. Common near-infrared absorbing materials include inorganic nanomaterials, such as various gold and silver nanoparticles, carbon nanotubes, and graphene. These materials are widely used in near-infrared photothermal therapy and fluorescence imaging. However, inorganic nanomaterials have high production costs, some contain metal elements, have poor compatibility with organic phase change materials, and are prone to precipitation during use, which limits their development and application. Organic near-infrared absorbing materials usually have large conjugated structures, such as polypyrrole, polyaniline, various dyes, and pigments. However, the molecular structures of these materials currently under development lack reactive functional groups. When applied to photothermal conversion phase change energy storage materials, they have poor binding forces with other components in the material, resulting in poor material stability and easy separation.

[0004] Current research on thermal control fibers mainly focuses on the characterization and preparation techniques of photothermal conversion fibers and phase change fibers. (Shi Haifeng) [1] Photothermal conversion ceramics were added to polypropylene material and melt-spun to prepare photothermal conversion fibers. The energy storage and heating properties of the fibers were then investigated. (Hosokawa H) [2] Using a core-sheath composite wet spinning process, polyacrylonitrile fibers were prepared with a core layer containing high-density conductive and photothermal conversion ceramic particles, and a sheath of ATO, etc. (Shi Limei) [3]Vacuum melt adsorption was used to adsorb phase change materials onto the surface of inorganic powders, effectively preventing the flow and leakage of liquid-phase phase change materials, thus preparing core-sheath composite phase change PET fibers, and the energy storage performance of the fibers was studied. The above studies all focused on photothermal conversion or phase change energy storage functions, but the behavioral characteristics of the synergistic temperature regulation function of photothermal conversion and phase change have not yet been investigated. Achieving the synergistic effect of photothermal conversion and phase change energy storage has significant practical implications in the fields of energy storage and photothermal conversion textiles. Summary of the Invention

[0005] To address the shortcomings and deficiencies of the existing technology, the present invention aims to provide a method for preparing Raschel blankets with energy storage and photothermal conversion properties. The method mainly involves using silver nanowire / nanoporous polyethylene composite fibers as the pile yarn and polyester as the base yarn, and preparing the Raschel blanket with energy storage and photothermal conversion properties using a Raschel warp knitting machine. By preparing silver nanowire ink and then using a simple "impregnation / drying" method and hot pressing process to prepare silver nanowire / nanoporous polyethylene composite fibers, the Raschel blanket is endowed with energy storage and photothermal conversion properties, achieving a synergistic effect of photothermal conversion and phase change energy storage. Furthermore, the energy storage and photothermal conversion Raschel blanket also possesses very high electrical conductivity and excellent chemical and mechanical stability, thereby increasing the added value and market competitiveness of the blanket.

[0006] To achieve the objective of this invention, the inventors provide the following technical solution:

[0007] A method for preparing a Raschel blanket with energy storage and photothermal conversion properties includes selecting silver nanowire / nanoporous polyethylene composite fiber as the pile yarn and polyester as the base yarn, and obtaining a Raschel blanket with energy storage and photothermal conversion properties through a Raschel warp knitting machine, wherein the silver nanowire / nanoporous polyethylene composite fiber is prepared by the following method:

[0008] (1) Preparation of silver nanowire ink:

[0009] The polyol was placed in a reaction vessel and preheated to remove moisture. A copper chloride / polyol solution was added and the temperature was maintained. Then, an AgNO3 / polyol solution and PVP were poured into the reaction vessel and stirred until homogeneous. The mixture was reacted at 160℃~180℃ for 2~3 hours and then cooled to room temperature. Subsequently, the mixed solution was diluted with acetone and centrifuged several times to obtain Ag NW. The Ag NW was dispersed in polyol, and a dispersant and surfactant were added to prepare silver nanowire ink.

[0010] (2) Preparation of silver nanowire / nanoporous polyethylene composite fibers:

[0011] The nanoporous polyethylene fiber is immersed in the silver nanowire ink obtained in step (1), then dried in a preheated oven. This process is repeated, and then the silver nanowire / nanoporous polyethylene composite fiber is obtained by hot pressing.

[0012] The inventors discovered that by adjusting the reaction conditions when preparing silver nanowire ink using the polyol method, silver nanowire ink with good uniformity and a large aspect ratio can be obtained, resulting in better photothermal conversion efficiency and antibacterial efficiency.

[0013] As a preferred embodiment, in the method for preparing a Raschel blanket for energy storage and photothermal conversion according to the present invention, in step (1): the polyol is one of ethylene glycol, glycerol, dibutanol or isopropanol, and the PVP (i.e., polyvinylpyrrolidone) is one of K10 (MW1 / 410,000), K30 (MW1 / 458,000) or K90 (MW1 / 41300,000).

[0014] As a preferred embodiment, in the method for preparing a Raschel blanket for energy storage and photothermal conversion according to the present invention, the step (1) of placing the polyol in the reaction vessel and preheating it to remove moisture refers to preheating the polyol in the reaction vessel at a temperature of 160°C to 190°C for 5 to 10 minutes to remove moisture.

[0015] As a preferred embodiment, in the method for preparing a Raschel blanket for energy storage and photothermal conversion according to the present invention, in step (1): a copper chloride / polyol solution is added and the solution temperature is maintained at 160℃~180℃ for 10min~15min.

[0016] As a preferred embodiment, in the method for preparing a Raschel blanket for energy storage and photothermal conversion according to the present invention, in step (1): stirring refers to stirring the solution in the reaction vessel at a temperature of 160°C to 180°C for 15 min to 20 min.

[0017] As a preferred embodiment, in the method for preparing a Raschel blanket for energy storage and photothermal conversion according to the present invention, in step (1): in order to remove PVP from the mixed solution and perform a purification operation, the mixed solution is diluted with acetone in a centrifuge tube at a volume ratio of 1:2 to 1:4, and centrifuged twice at 6000 rpm to 10000 rpm for 10 min to 30 min.

[0018] As a preferred embodiment, in the method for preparing a Raschel blanket for energy storage and photothermal conversion according to the present invention, in step (1): Ag NW is dispersed in a polyol and a dispersant and a surfactant are added, the amount added is based on the mass of the polyol, 0.2wt% to 1wt% of Ag NW, 1wt% to 8wt% of the dispersant 2-amino-2-methyl-1-propanol, and 1wt% to 5wt% of the fluorocarbon surfactant.

[0019] Preferably, in the method for preparing a Raschel blanket for energy storage and photothermal conversion according to the present invention, in step (2): the nanoporous polyethylene composite fiber is immersed in silver nanowire ink for 3 to 8 minutes, and then dried in a preheated oven at 100°C to 120°C for 1 to 2 hours. This process is repeated 3 to 5 times. The nanoporous polyethylene fiber is a commercially available product.

[0020] As a preferred embodiment, in the method for preparing a Raschel blanket for energy storage and photothermal conversion according to the present invention, in step (2), the main process parameters of the hot pressing process include a temperature of 100-130°C and a pressure of 10-15 MPa for 3-5 minutes.

[0021] In detail, this invention provides a method for preparing a Raschel blanket with energy storage and photothermal conversion capabilities, mainly including the following steps:

[0022] 1) Preparation of silver nanowire ink: 25L of polyol was placed in a reaction vessel and preheated at 160℃~190℃ for 5~10min to remove moisture. 3L of 1mmol / L copper chloride / polyol solution was added and the temperature was maintained. Then, 10L of 0.1mol / L AgNO3 / polyol solution and 200-250g of PVP (K10 (MW1 / 410,000), K30 (MW1 / 458,000) or K90 (MW1 / 41300,000)) were poured into the reaction vessel and stirred until homogeneous. The mixture was reacted at 160℃~180℃ for 2~3h and then cooled to room temperature. Subsequently, the mixed solution was diluted with acetone (at a volume ratio of 1:2~1:4) and centrifuged at 6000rpm~10000rpm for 10min~30min. After centrifugation twice, Ag NW was obtained. Silver nanowire ink was prepared by dispersing NW in a polyol and adding 1 wt% to 8 wt% of dispersant 2-amino-2-methyl-1-propanol and 1 wt% to 5 wt% of fluorocarbon surfactant, based on the amount of polyol.

[0023] 2) Preparation of silver nanowire / nanoporous polyethylene composite fibers: Nanooporous polyethylene fibers are immersed in silver nanowire ink for 3-8 minutes, then dried in a preheated oven at 100℃-120℃ for 1-2 hours. This process is repeated 3-5 times. Finally, silver nanowire / nanoporous polyethylene composite fibers are prepared by hot pressing at 100-130℃ and 10-15 MPa for 3-5 minutes.

[0024] 3) Energy storage and photothermal conversion Raschel blankets are prepared using silver nanowire / nanoporous polyethylene composite fibers as the pile yarn and polyester as the base yarn via a Raschel warp knitting machine. (For the preparation method, please refer to the application number: CN201510721334.2, which describes a production method for antistatic Raschel blankets).

[0025] The above steps can produce a Raschel blanket with energy storage and photothermal conversion capabilities. To make the invention's objectives, product features, and advantages more apparent and understandable, the invention will be further described in detail below with reference to specific embodiments.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. This invention uses silver nanowire ink to prepare silver nanowire / nanoporous polyethylene composite fibers with energy storage and photothermal conversion functions through a simple "impregnation / drying" method and hot pressing process. This gives Raschel blankets very high conductivity and excellent energy storage and photothermal conversion functions. The preparation process is simple and suitable for large-scale industrial production.

[0028] 2. Silver nanowire ink was prepared by adding 2-amino-2-methyl-1-propanol dispersant and fluorocarbon surfactant to the silver nanowire alcohol dispersion. This gave the silver nanowire ink excellent dispersion stability and storage stability, and eliminated the generation of ink bubbles, allowing it to be uniformly distributed in polyethylene fibers.

[0029] 3. This invention uses a hot-pressing process to firmly bond silver nanowires with nanoporous polyethylene fibers, which greatly improves the product's durability. At the same time, the silver nanowires / nanoporous polyethylene fibers endow Raschel blankets with certain antibacterial and antistatic properties, and the porous polyethylene fibers have excellent breathability. These additional properties enhance the product's potential value. Detailed Implementation

[0030] The present invention will be described in more detail below with reference to the embodiments. It should be understood that the implementation of the present invention is not limited to the embodiments below, and any modifications and / or alterations made to the present invention will fall within the protection scope of the present invention.

[0031] In this invention, unless otherwise specified, all parts and percentages are by weight, and all equipment and raw materials are commercially available or commonly used in the industry. Unless otherwise specified, the methods used in the embodiments are general techniques in the art.

[0032] Example 1

[0033] A method for preparing a Raschel blanket for energy storage and photothermal conversion includes the following steps:

[0034] 1) Preparation of silver nanowire ink: 25 L of ethylene glycol was placed in a reaction vessel and preheated at 160 °C for 5 min to remove moisture. 3 L of a 1 mmol / L copper chloride / ethylene glycol solution was added and the temperature was maintained at 160 °C for 10 min. Then, 10 L of a 0.1 mol / L AgNO3 / ethylene glycol solution and 250 g of PVP (K10 (MW1 / 410,000)) were added to the reaction vessel and stirred for 15 min until homogeneous. The mixture was reacted at 160 °C for 2 h and then cooled to room temperature. The solution was then diluted with acetone (1:2 volume ratio) and centrifuged at 10000 rpm for 10 min. After two centrifugations, Ag nanowires were obtained. The Ag nanowires were dispersed in ethylene glycol (0.2 wt%), and 1 wt% of 2-amino-2-methyl-1-propanol (a dispersant) and 3 wt% of a fluorocarbon surfactant were added to prepare the silver nanowire ink.

[0035] 2) Preparation of silver nanowire / nanoporous polyethylene composite fibers: Nanooporous polyethylene fibers were immersed in silver nanowire ink for 3 minutes, then dried in a preheated oven at 100°C for 1 hour. This process was repeated three times. The fibers were then subjected to a hot-pressing process at 100°C and 10 MPa for 3 minutes to obtain the aforementioned silver nanowire / nanoporous polyethylene composite fibers.

[0036] 3) The energy storage and photothermal conversion Raschel blanket is prepared by using silver nanowire / nanoporous polyethylene composite fiber as the pile yarn and polyester as the base yarn through a Raschel warp knitting machine.

[0037] Example 2

[0038] A method for preparing a Raschel blanket for energy storage and photothermal conversion includes the following steps:

[0039] 1) Preparation of silver nanowire ink: 25 L of ethylene glycol was placed in a reaction vessel and preheated at 160 °C for 5 min to remove moisture. 3 L of a 1 mmol / L copper chloride / ethylene glycol solution was added and the temperature was maintained at 160 °C for 10 min. Then, 10 L of a 0.1 mol / L AgNO3 / ethylene glycol solution and 250 g of PVP (K30 (MW1 / 458,000)) were poured into the reaction vessel and stirred for 15 min until homogeneous. The mixture was reacted at 160 °C for 2 h and then cooled to room temperature. The solution was then diluted with acetone (1:2 volume ratio) and centrifuged at 10000 rpm for 10 min. After two centrifugations, Ag nanowires were obtained. The Ag nanowires were dispersed in ethylene glycol (0.2 wt%), and 1 wt% of 2-amino-2-methyl-1-propanol (a dispersant) and 3 wt% of a fluorocarbon surfactant were added to prepare the silver nanowire ink.

[0040] 2) Preparation of silver nanowire / nanoporous polyethylene composite fibers: Nanooporous polyethylene fibers were immersed in silver nanowire ink for 3 minutes, then dried in a preheated oven at 100°C for 2 hours. This process was repeated three times. The fibers were then subjected to a hot-pressing process at 120°C and 15 MPa for 5 minutes to obtain the aforementioned silver nanowire / nanoporous polyethylene composite fibers.

[0041] 3) The energy storage and photothermal conversion Raschel blanket is prepared by using silver nanowire / nanoporous polyethylene composite fiber as the pile yarn and polyester as the base yarn through a Raschel warp knitting machine.

[0042] Example 3

[0043] A method for preparing a Raschel blanket for energy storage and photothermal conversion includes the following steps:

[0044] 1) Preparation of silver nanowire ink: 25 L of ethylene glycol was placed in a reaction vessel and preheated at 160 °C for 5 min to remove moisture. 3 L of a 1 mmol / L copper chloride / ethylene glycol solution was added and the temperature was maintained at 160 °C for 10 min. Then, 10 L of a 0.1 mol / L AgNO3 / ethylene glycol solution and 250 g of PVP (K90 (MW1 / 41300,000)) were poured into the reaction vessel and stirred for 15 min until homogeneous. The mixture was reacted at 160 °C for 3 h and then cooled to room temperature. The solution was then diluted with acetone (1:4 volume ratio) and centrifuged at 6000 rpm for 30 min. After two centrifugations, Ag nanowires were obtained. The Ag nanowires were dispersed in ethylene glycol (1 wt%), and 3 wt% of 2-amino-2-methyl-1-propanol and 1 wt% of a fluorocarbon surfactant were added to prepare the silver nanowire ink.

[0045] 2) Preparation of silver nanowire / nanoporous polyethylene composite fibers: Nanooporous polyethylene fibers were immersed in silver nanowire ink for 3 minutes, then dried in a preheated oven at 120°C for 1 hour. This process was repeated three times. The fibers were then subjected to a hot-pressing process at 130°C and 10 MPa for 5 minutes to obtain the aforementioned silver nanowire / nanoporous polyethylene composite fibers.

[0046] 3) The energy storage and photothermal conversion Raschel blanket is prepared by using silver nanowire / nanoporous polyethylene composite fiber as the pile yarn and polyester as the base yarn through a Raschel warp knitting machine.

[0047] Example 4

[0048] A method for preparing a Raschel blanket for energy storage and photothermal conversion includes the following steps:

[0049] 1) Preparation of silver nanowire ink: 25 L of ethylene glycol was placed in a reaction vessel and preheated at 180 °C for 5 min to remove moisture. 3 L of a 1 mmol / L copper chloride / ethylene glycol solution was added and the temperature was maintained at 180 °C for 6 min. Then, 10 L of a 0.1 mol / L AgNO3 / ethylene glycol solution and 250 g of PVP (K90 (MW1 / 41300,000)) were added to the reaction vessel and stirred for 15 min until homogeneous. The mixture was reacted at 180 °C for 2 h and then cooled to room temperature. The solution was then diluted with acetone (1:3 volume ratio) and centrifuged at 8000 rpm for 20 min. After two centrifugations, Ag nanowires were obtained. The Ag nanowires were dispersed in ethylene glycol (1 wt%), and 3 wt% of 2-amino-2-methyl-1-propanol and 1 wt% of a fluorocarbon surfactant were added to prepare the silver nanowire ink.

[0050] 2) Preparation of silver nanowire / nanoporous polyethylene composite fibers: Nanooporous polyethylene fibers were immersed in silver nanowire ink for 3 minutes, then dried in a preheated oven at 120°C for 1 hour. This process was repeated three times. The fibers were then subjected to a hot-pressing process at 130°C and 10 MPa for 5 minutes to obtain the aforementioned silver nanowire / nanoporous polyethylene composite fibers.

[0051] 3) The energy storage and photothermal conversion Raschel blanket is prepared by using silver nanowire / nanoporous polyethylene composite fiber as the pile yarn and polyester as the base yarn through a Raschel warp knitting machine.

[0052] Example 5

[0053] A method for preparing a Raschel blanket for energy storage and photothermal conversion includes the following steps:

[0054] 1) Preparation of silver nanowire ink: 25 L of ethylene glycol was placed in a reaction vessel and preheated at 180 °C for 5 min to remove moisture. 3 L of a 1 mmol / L copper chloride / ethylene glycol solution was added and the temperature was maintained at 180 °C for 6 min. Then, 10 L of a 0.1 mol / L AgNO3 / ethylene glycol solution and 250 g of PVP (K90 (MW1 / 41300,000)) were poured into the reaction vessel and stirred for 15 min until homogeneous. The mixture was reacted at 180 °C for 2 h and then cooled to room temperature. The solution was then diluted with acetone (1:2 volume ratio) and centrifuged at 10000 rpm for 10 min. After two centrifugations, Ag nanowires were obtained. The Ag nanowires were dispersed in ethylene glycol (1 wt%), and 8 wt% of 2-amino-2-methyl-1-propanol (a dispersant) and 5 wt% of a fluorocarbon surfactant were added to prepare the silver nanowire ink.

[0055] 2) Preparation of silver nanowire / nanoporous polyethylene composite fibers: Nanooporous polyethylene fibers were immersed in silver nanowire ink for 3 minutes, then dried in a preheated oven at 120°C for 1 hour. This process was repeated three times. The fibers were then subjected to a hot-pressing process at 130°C and 10 MPa for 5 minutes to obtain the aforementioned silver nanowire / nanoporous polyethylene composite fibers.

[0056] 3) The energy storage and photothermal conversion Raschel blanket is prepared by using silver nanowire / nanoporous polyethylene composite fiber as the pile yarn and polyester as the base yarn through a Raschel warp knitting machine.

[0057] Example 6

[0058] A method for preparing a Raschel blanket for energy storage and photothermal conversion includes the following steps:

[0059] 1) Preparation of silver nanowire ink: 25 L of ethylene glycol was placed in a reaction vessel and preheated at 180 °C for 5 min to remove moisture. 3 L of a 1 mmol / L copper chloride / ethylene glycol solution was added and the temperature was maintained at 180 °C for 5 min. Then, 10 L of a 0.1 mol / L AgNO3 / ethylene glycol solution and 250 g of PVP (K90 (MW1 / 41300,000)) were poured into the reaction vessel and stirred for 15 min until homogeneous. The mixture was reacted at 180 °C for 2 h and then cooled to room temperature. The solution was then diluted with acetone (1:3 volume ratio) and centrifuged at 8000 rpm for 20 min. After two centrifugations, Ag nanowires were obtained. The Ag nanowires were dispersed in ethylene glycol (1 wt%), and 8 wt% of 2-amino-2-methyl-1-propanol and 5 wt% of a fluorocarbon surfactant were added to prepare the silver nanowire ink.

[0060] 2) Preparation of silver nanowire / nanoporous polyethylene composite fiber: Nanooporous polyethylene fiber was immersed in silver nanowire ink for 8 minutes, then dried in a preheated oven at 110℃ for 1.5 hours. This process was repeated three times. The fiber was then subjected to a hot-pressing process at 110℃ and 15 MPa for 5 minutes to obtain the silver nanowire / nanoporous polyethylene composite fiber.

[0061] 3) The energy storage and photothermal conversion Raschel blanket is prepared by using silver nanowire / nanoporous polyethylene composite fiber as the pile yarn and polyester as the base yarn through a Raschel warp knitting machine.

[0062] Example 7

[0063] A method for preparing a Raschel blanket for energy storage and photothermal conversion includes the following steps:

[0064] 1) Preparation of silver nanowire ink: 25 L of glycerol was placed in a reaction vessel and preheated at 180 °C for 5 min to remove moisture. 3 L of a 1 mmol / L copper chloride / glycerol solution was added and the temperature was maintained at 180 °C for 5 min. Then, 10 L of a 0.1 mol / L AgNO3 / glycerol solution and 250 g of PVP (K90 (MW1 / 41300,000)) were added to the reaction vessel and stirred for 15 min until homogeneous. The mixture was reacted at 180 °C for 2 h and then cooled to room temperature. The solution was then diluted with acetone (1:2 volume ratio) and centrifuged at 10000 rpm for 10 min. After two centrifugations, Ag nanowires were obtained. The Ag nanowires were dispersed in glycerol (1 wt%), and 8 wt% of 2-amino-2-methyl-1-propanol (a dispersant) and 5 wt% of a fluorocarbon surfactant were added to prepare the silver nanowire ink.

[0065] 2) Preparation of silver nanowire / nanoporous polyethylene composite fibers: Nanooporous polyethylene fibers were immersed in silver nanowire ink for 8 minutes, then dried in a preheated oven at 120°C for 1 hour. This process was repeated three times. The fibers were then subjected to a hot-pressing process at 130°C and 10 MPa for 5 minutes to obtain the aforementioned silver nanowire / nanoporous polyethylene composite fibers.

[0066] 3) The energy storage and photothermal conversion Raschel blanket is prepared by using silver nanowire / nanoporous polyethylene composite fiber as the pile yarn and polyester as the base yarn through a Raschel warp knitting machine.

[0067] Example 8

[0068] A method for preparing a Raschel blanket for energy storage and photothermal conversion includes the following steps:

[0069] 1) Preparation of silver nanowire ink: 25 L of ethylene glycol was placed in a reaction vessel and preheated at 160 °C for 5 min to remove moisture. 3 L of a 1 mmol / L copper chloride / ethylene glycol solution was added and the temperature was maintained at 160 °C for 10 min. Then, 10 L of a 0.1 mol / L AgNO3 / ethylene glycol solution and 250 g of PVP (K90 (MW1 / 41300,000)) were added to the reaction vessel and stirred for 20 min until homogeneous. The mixture was reacted at 160 °C for 3 h and then cooled to room temperature. The solution was then diluted with acetone (1:2 volume ratio) and centrifuged at 10000 rpm for 10 min. After two centrifugations, Ag nanowires were obtained. The Ag nanowires were dispersed in ethylene glycol (1 wt%), and 8 wt% of 2-amino-2-methyl-1-propanol (a dispersant) and 5 wt% of a fluorocarbon surfactant were added to prepare the silver nanowire ink.

[0070] 2) Preparation of silver nanowire / nanoporous polyethylene composite fibers: Nanooporous polyethylene fibers were immersed in silver nanowire ink for 8 minutes, then dried in a preheated oven at 100°C for 1 hour. This process was repeated 5 times. The fibers were then subjected to a hot-pressing process at 100°C and 10 MPa for 3 minutes to obtain the aforementioned silver nanowire / nanoporous polyethylene composite fibers.

[0071] 3) The energy storage and photothermal conversion Raschel blanket is prepared by using silver nanowire / nanoporous polyethylene composite fiber as the pile yarn and polyester as the base yarn through a Raschel warp knitting machine.

[0072] Example 9

[0073] A method for preparing a Raschel blanket for energy storage and photothermal conversion includes the following steps:

[0074] 1) Preparation of silver nanowire ink: 25 L of dibutanol was placed in a reaction vessel and preheated at 160 °C for 5 min to remove moisture. 3 L of a 1 mmol / L copper chloride / dibutanol solution was added and the temperature was maintained at 160 °C for 10 min. Then, 10 L of a 0.1 mol / L AgNO3 / dibutanol solution and 250 g of PVP (K90 (MW1 / 41300,000)) were added to the reaction vessel and stirred for 20 min until homogeneous. The mixture was reacted at 160 °C for 3 h and then cooled to room temperature. The solution was then diluted with acetone (1:2 volume ratio) and centrifuged at 10000 rpm for 10 min. After two centrifugations, Ag nanowires were obtained. The Ag nanowires were dispersed in dibutanol (1 wt%), and 8 wt% of 2-amino-2-methyl-1-propanol (a dispersant) and 5 wt% of a fluorocarbon surfactant were added to prepare the silver nanowire ink.

[0075] 2) Preparation of silver nanowire / nanoporous polyethylene composite fibers: Nanooporous polyethylene fibers were immersed in silver nanowire ink for 8 minutes, then dried in a preheated oven at 100°C for 1 hour. This process was repeated 5 times. The fibers were then subjected to a hot-pressing process at 100°C and 10 MPa for 3 minutes to obtain the aforementioned silver nanowire / nanoporous polyethylene composite fibers.

[0076] 3) The energy storage and photothermal conversion Raschel blanket is prepared by using silver nanowire / nanoporous polyethylene composite fiber as the pile yarn and polyester as the base yarn through a Raschel warp knitting machine.

[0077] Example 10

[0078] A method for preparing a Raschel blanket for energy storage and photothermal conversion includes the following steps:

[0079] 1) Preparation of silver nanowire ink: 25 L of isopropanol was placed in a reaction vessel and preheated at 160 °C for 5 min to remove moisture. 3 L of a 1 mmol / L copper chloride / isopropanol solution was added and the temperature was maintained at 160 °C for 10 min. Then, 10 L of a 0.1 mol / L AgNO3 / isopropanol solution and 250 g of PVP (K90 (MW1 / 41300,000)) were added to the reaction vessel and stirred for 20 min until homogeneous. The mixture was reacted at 160 °C for 3 h and then cooled to room temperature. The solution was then diluted with acetone (1:2 volume ratio) and centrifuged at 10000 rpm for 10 min. After two centrifugations, Ag nanowires were obtained. The Ag nanowires were dispersed in isopropanol (1 wt%), and 8 wt% of 2-amino-2-methyl-1-propanol (a dispersant) and 5 wt% of a fluorocarbon surfactant were added to prepare the silver nanowire ink.

[0080] 2) Preparation of silver nanowire / nanoporous polyethylene composite fibers: Nanooporous polyethylene fibers were immersed in silver nanowire ink for 8 minutes, then dried in a preheated oven at 100°C for 1 hour. This process was repeated 5 times. The fibers were then subjected to a hot-pressing process at 100°C and 10 MPa for 3 minutes to obtain the aforementioned silver nanowire / nanoporous polyethylene composite fibers.

[0081] 3) The energy storage and photothermal conversion Raschel blanket is prepared by using silver nanowire / nanoporous polyethylene composite fiber as the pile yarn and polyester as the base yarn through a Raschel warp knitting machine.

[0082] Comparative Example 1

[0083] A blanket made of nanoporous polyethylene composite fiber as pile yarn (without silver nanowire ink treatment) and polyester as base yarn, and Raschel blanket made by Raschel weaving mechanism.

[0084] The blanket in Comparative Example 1 is merely an ordinary blanket. Compared to the energy storage and photothermal conversion Raschel blanket product prepared according to the embodiments of the present invention, its infrared irradiation temperature is at most 60°C, it does not have photothermal conversion capability, and its surface resistivity is 9.2 × 10⁻⁶. 14 Ω, does not have antistatic properties, and has an E. coli inhibition rate of 0%.

[0085] Comparative Example 2

[0086] A method for preparing a Raschel blanket is as follows:

[0087] 1) Preparation of silver nanowire / nanoporous polyethylene composite fiber: The nanooporous polyethylene fiber was immersed in commercially available silver nanowire ink (1wt%) for 8 min, and then dried in a preheated oven at 100℃ for 1 hour. This process was repeated 5 times, followed by hot pressing at 100℃ and 10 MPa for 3 min to prepare the silver nanowire / nanoporous polyethylene composite fiber.

[0088] 2) Energy storage and photothermal conversion Raschel blankets are made by using silver nanowire / nanoporous polyethylene composite fiber as fleece yarn and polyester as base yarn through a Raschel weaving mechanism.

[0089] Comparative Example 2's blanket was a commercially available silver nanowire ink-treated blanket, with a photothermal conversion rate of only 20%, a maximum infrared irradiation temperature of 70°C, and a surface resistivity of 5.5 × 10⁻⁶. 10 Ω, with an E. coli inhibition rate of 80%. Compared with the energy storage and photothermal conversion Raschel blanket product of the present invention (Example 8), Comparative Example 2 is far inferior to the present invention in terms of antistatic properties, antibacterial properties, and photothermal conversion properties.

[0090] Table 1. Description of raw material ratios and process parameters for the examples and comparative examples.

[0091]

[0092] Table 2. Performance test data of blankets in the examples and comparative examples.

[0093] Photothermal conversion efficiency (%) Maximum temperature under infrared light irradiation (°C) Surface resistivity (Ω) Escherichia coli inhibition rate (%) Example 1 12 62 <![CDATA[8.2×10 10 ]]> 63 Example 2 18 66 <![CDATA[6.8×10 10 ]]> 70 Example 3 25 82 <![CDATA[1.3×10 10 ]]> 86 Example 4 22 73 <![CDATA[2.5×10 10 ]]> 82 Example 5 36 91 <![CDATA[4.6×10 9 ]]> 90 Example 6 40 95 <![CDATA[2.1×10 9 ]]> 91 Example 7 30 88 <![CDATA[8.2×10 9 ]]> 88 Example 8 48 110 <![CDATA[9.8×10 8 ]]> 95 Example 9 42 100 <![CDATA[9.3×10 8 ]]> 92 Example 10 45 105 <![CDATA[9.6×10 8 ]]> 94 Comparative Example 1 0 60 <![CDATA[9.2×10 14 ]]> 0 Comparative Example 2 20 70 <![CDATA[5.5×10 10 ]]> 80

[0094] This invention provides an energy storage and photothermal conversion Raschel blanket that not only possesses photothermal conversion and temperature-regulating capabilities but also exhibits antibacterial, antistatic, and other properties, meeting people's needs for a healthy life and bringing significant social and economic benefits. Furthermore, when the AgNW content is 1% (Examples 3-10), the photothermal conversion efficiency of the Raschel blanket is superior to commercially available AgNW ink (Comparative Example 2). When using ethylene glycol, PVP with a molecular weight of 1,300,000, a dispersant dosage of 8%, a surfactant dosage of 5%, an AgNW content of 1%, and immersion five times for 8 minutes each time (Example 8), the blanket performance is particularly outstanding, with a photothermal conversion rate of 48%, a maximum temperature of 110°C under infrared irradiation, and a surface resistivity of 9.8 × 10⁻⁶. 8 Ω, with an E. coli inhibition rate of 95%, far superior to Comparative Example 2.

[0095] References:

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[0097] [2] Hosokawa H. Photothermal conversion conductive polyacrylonitrile fiber Thermocatch^TM—W[J]. Foreign Textile Technology, 2001(195):8-11.

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Claims

1. A method for preparing a lashed rug for energy storage and photothermal conversion, characterized in that, The preparation method comprises selecting silver nanowire / nanoporous polyethylene composite fibers as the pile yarn and polyester as the base yarn, and preparing a Raschel blanket with energy storage and light-heat conversion performance by using a Raschel warp knitting machine, wherein the silver nanowire / nanoporous polyethylene composite fibers are prepared by the following method: (1) Preparation of silver nanowire ink: polyol is placed in a reaction kettle and preheated, copper chloride / polyol solution is added and the temperature is maintained, AgNO3 / polyol solution and PVP are poured into the reaction kettle and stirred until uniform, then the mixed solution is diluted with acetone and centrifuged for several times to obtain Ag NW, then the Ag NW is dispersed in polyol and a dispersant and a surfactant are added to prepare silver nanowire ink, the addition amount is 0.2wt%-1wt% of Ag NW, 1wt%-8wt% of dispersant 2-amino 2-methyl 1-propanol, and 1wt%-5wt% of fluorocarbon surfactant based on the mass of polyol, (2) Preparation of silver nanowire / nanoporous polyethylene composite fibers: The nanoporous polyethylene fibers are immersed in the silver nanowire ink prepared in step (1) for 3-8 min, then dried in a preheated oven at 100-120°C for 1-2 hours, the process is repeated 3-5 times, and then a silver nanowire / nanoporous polyethylene composite fiber is prepared by hot pressing process.

2. A method of manufacturing a Lashelle blanket for energy storage and light-heat conversion according to claim 1, characterized in that, In step (1), the polyol is one of ethylene glycol, glycerol, dibutanol or isopropyl alcohol, and the PVP is one of K10, K30 or K90.

3. A method of preparing a Lashelle blanket for energy storage and light-heat conversion according to claim 1, characterized in that, In step (1), the polyol is placed in a reaction kettle and preheated, which means that the polyol in the reaction kettle is preheated at 160-190°C for 5-10 min.

4. The method for preparing a Raschel blanket for energy storage and photothermal conversion according to claim 1, characterized in that, In step (1), the copper chloride / polyol solution is added and the temperature is maintained at 160-180°C for 10-15 min.

5. The method for preparing a Raschel blanket for energy storage and photothermal conversion according to claim 1, characterized in that, In step (1), stirring means stirring the solution in the reaction kettle at a temperature of 160-180°C for 15-20 min.

6. The method for preparing a Raschel blanket for energy storage and photothermal conversion according to claim 1, characterized in that, In step (1), the mixed solution is diluted with acetone in a centrifuge tube at a volume ratio of 1:2-1:4, and centrifuged at 6000-10000 rpm for 10-30 min, twice.

7. The method for preparing a Raschel blanket for energy storage and photothermal conversion according to claim 1, characterized in that, In step (2), the main process parameters of the hot pressing process include a temperature of 100-130°C, a pressure of 10-15 Mpa, and a treatment time of 3-5 min.

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