Method for enhancing infrared reflectivity of textile fabric and application

Abstract

The invention provides a method for enhancing infrared reflectivity of a textile fabric and application, and belongs to the field of functional textile fabrics, the method comprises the following steps: pretreating the textile fabric with a nano metal coating deposited on the surface, and depositing a metal oxide coating on the surface of the nano metal coating by using an atomic layer deposition technology, the wear resistance, the washing resistance and the infrared reflectivity of the nano-metal coating textile fabric are enhanced. The metal oxide coating is deposited on the surface of the nano-metal coating of the textile fabric by adopting an atomic layer deposition technology, so that the coating is high in covering capacity and has excellent three-dimensional configuration surface coating capacity, the interface bonding force of the nano-metal coating and the textile fabric is improved, the wear resistance and washing resistance of the nano-metal coating and the infrared reflection performance of the textile fabric are enhanced, and the textile fabric has a good application prospect. Further, the shape preserving performance and the infrared heat preservation performance of the textile fabric are improved. Compared with the prior art in which an adhesive material is introduced or a plasma surface treatment technology is adopted, the method is remarkable in effect, simple in process, low in cost and good in industrial application prospect.

Description

Technical Field

[0001] The present invention relates to the technical field of functional textiles, and in particular to a method for enhancing the infrared reflectivity of textiles and applications thereof. Background Art

[0002] With the rapid development of functional textiles, depositing nano-metal layers (such as copper, silver, and aluminum) on textile surfaces to impart conductivity, electromagnetic shielding, or decorative properties has become a research hotspot in the textile field. However, due to the inherent softness, roughness, and high porosity of textiles, the metal layer has poor adhesion to the textile surface, making it prone to shedding and wear during use or washing, significantly limiting the application of metallized functional textiles.

[0003] In the prior art, an invention patent provides a composite structure comprising an upper layer having an upper surface fabric and an upper lining, and a lower layer having a lower surface fabric and a lower lining, wherein at least one of the upper layer and the lower layer comprises a metal layer and an adhesive layer fixed to the metal layer; the metal layer is vapor-deposited onto a polymer layer and laminated with at least one of the upper surface fabric and the lower surface fabric. In addition, a patent discloses a metallized breathable composite fabric comprising an inner layer, a metallized film disposed on the inner layer, and an outer layer disposed on the metallized film; the metallized film comprises a base layer comprising a polymer and a metal layer deposited on a first surface of the base layer, the inner layer is connected to the metallized film via a first point contact, and the outer layer is connected to the metallized film via a second point contact, wherein the first point contact and the second point contact comprise an adhesive to achieve the composite of the metallized film with the inner and outer layers.

[0004] In all of these textiles, adhesives are introduced to improve the adhesion of the metal layer to the textile surface, thereby enhancing the wear resistance of the metal layer and preventing the metal material from falling off the textile surface. However, the introduction of adhesives not only affects the textile's inherent properties, such as breathability and comfort, but also affects related properties of the nanometal layer, such as infrared reflectivity. Furthermore, the adhesives are complex to manufacture, exhibit weak bonding strength, and exhibit poor durability, leading to problems such as poor reproducibility and a short service life for metallized functional textiles. Furthermore, conventional methods for improving the adhesion of nanometal layers, including plasma surface treatment, can significantly damage the textile surface and properties, and are costly, making them difficult to commercialize and apply. Summary of the Invention

[0005] In view of the technical problems existing in the background technology, the present application provides a method and application for enhancing the infrared reflectivity of textiles, aiming to solve the technical problems of poor interface bonding, wear resistance and water washability between the nano-metal coating of the textile and the fabric substrate, and the existing introduction of adhesive materials that will affect the infrared reflectivity of the nano-metal coating textiles.

[0006] In one aspect, an embodiment of the present application provides a method for enhancing the infrared reflectivity of a textile, wherein a metal oxide coating is deposited on the surface of a textile having a nano-metal coating by atomic layer deposition technology, wherein the thickness of the metal oxide coating is 5 to 50 nm.

[0007] In the technical solution of the embodiment of the present application, a metal oxide coating is deposited on the surface of the nanometal coating of the textile using atomic layer deposition technology. This metal oxide coating forms a wrapping layer between the textile yarn surface and the nanometal particles. This not only significantly improves the interfacial bonding between the nanometal coating and the textile, but also enhances the wear resistance, water washability, and infrared reflectivity of the nanometal-coated textile. It effectively protects the nanometal coating from friction damage, making it less likely to fall off and wear during subsequent use or washing of the textile, thereby improving the overall shape retention and infrared thermal insulation properties of the textile, without adversely affecting the original properties of the textile and the nanometal coating. Compared with the existing technologies that introduce adhesives or use plasma surface treatment technology, the method of this embodiment has a simple process, low cost, and good industrial application prospects. It does not damage the inherent properties of the textile, such as breathability and comfort. It significantly improves the adhesion of the nanometal coating on the textile surface and has good durability, resulting in good repeatability, long service life, and strong practicality of the metallized functional textile.

[0008] In some embodiments, the infrared reflectivity of the textile with the nano-metal coating deposited on the surface is greater than 80%. The metal oxide coating is a layer of material comprising one or more of titanium dioxide, zinc oxide, aluminum oxide, and silicon oxide.

[0009] In this embodiment, the nano-metal coating is a material with high infrared reflective properties, which gives the textile high infrared reflective properties, making it applicable to the field of thermal insulation and temperature-regulating textiles. After the metal oxide coating is deposited on the surface of the nano-metal coating, it not only does not affect the infrared reflective properties of the nano-metal coating, but on the contrary, because the deposited metal oxide coating has high infrared transmittance, it plays a role in enhancing the infrared reflective properties of the nano-metal coating textile, thereby comprehensively improving the infrared thermal insulation properties of the textile; in this way, the technical defect of using an adhesive layer to composite the nano-metal coating and the fabric substrate, which will adversely affect the infrared reflective properties of the nano-metal coating, is overcome.

[0010] In some embodiments, the deposition temperature of the atomic layer deposition technology is 80-150°C.

[0011] In this embodiment, low-temperature atomic layer deposition technology is used. The process is mild and suitable for processing natural or synthetic fiber textiles. It is suitable for flexible fabric substrates with surface deposition of nano-metal coatings, avoiding damage to the interface between the nano-metal coating and the textile and the structure and properties of the textile itself caused by high-temperature treatment.

[0012] In some embodiments, the method for enhancing infrared reflectivity of a textile comprises the following steps: S1. Pre-treating a textile with a nano-metal coating deposited on its surface and placing it on a sample stage in a reaction chamber of an atomic layer deposition device; S2. Evacuate the reaction chamber, set the deposition temperature to 80-150°C, set the cycle parameters, alternately introduce a metal source and an oxidant into the reaction chamber, and after multiple cycles, obtain a metal oxide coating with a thickness of 5-50 nm on the surface of the nano-metal coating of the textile, thereby obtaining a highly infrared reflective textile; the cycle parameters are as follows: each cycle includes a 1-second precursor pulse, a 10-second nitrogen purge, a 1-second oxidant pulse, and a 10-second nitrogen purge, the precursor is a metal source, the oxidant is water vapor, and the number of cycles is 200-800 times.

[0013] In this embodiment, atomic layer deposition technology is used to obtain a metal oxide coating with a certain thickness on the surface of the nano-metal coating of the textile. The thickness is precisely controllable, and the metal oxide coating has a strong covering ability and excellent three-dimensional surface coating ability, which greatly improves the bonding performance between the nano-metal coating and the textile without adversely affecting the performance of the textile and the nano-metal coating. The method is simple in process, widely applicable, and suitable for industrial promotion and production.

[0014] In some embodiments, in step S1, the nano-metal coating is a metal layer formed of one or more of copper, silver, aluminum, and titanium. The nano-metal coating is a silver layer or an aluminum layer, the metal source is titanium tetrachloride, and the oxidant is water vapor, and the resulting wear-resistant and water-resistant metal oxide coating is a titanium dioxide layer.

[0015] In this embodiment, the nano-metal coating is made of a metal material with certain high infrared reflective properties, which, combined with the infrared transmittance of the metal oxide coating, synergistically improves the infrared reflective properties of the final textile. In addition, when the nano-metal coating is a silver layer or an aluminum layer, a titanium dioxide layer is deposited on its surface, which can greatly enhance the infrared reflective properties of the nano-metal coated textile, thereby obtaining a textile with excellent infrared thermal insulation properties.

[0016] In some embodiments, in step S1, the pretreatment is to ultrasonically clean the textile with the nano-metal coating deposited on the surface with deionized water and ethanol solution for 8-12 minutes respectively, and then dry it at 70-90°C.

[0017] In some embodiments, in step S2, the strong infrared reflective textile comprises a textile having a nano-metal coating deposited on its surface, and a metal oxide coating deposited on the surface of the nano-metal coating, wherein the thickness of the metal oxide coating is 5-50 nm.

[0018] In the second aspect, an embodiment of the present application provides an application of a method for enhancing the infrared reflectivity of a textile as described in any one of the above-mentioned methods, which is applied to a textile with a nano-metal coating deposited on the surface to enhance the interfacial bonding force between the nano-metal coating and the textile, improve the wear resistance and water wash resistance of the nano-metal coating, and improve the infrared reflectivity of the nano-metal coated textile.

[0019] In the technical solution of the embodiment of the present application, the method has a simple process, a wide range of types of fabric substrates, nano-metal coatings and metal oxide coatings, and can be applied to the deposition of various textile materials and various metal materials, and has wide applicability.

[0020] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To more clearly illustrate the technical solution of this application, the following is a brief introduction to the drawings used in this application. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0022] Figure 1 This is a graph showing the infrared reflectivity test results of various textiles in Example 1 of the present application; Figure 2 This is a graph showing the Martindale abrasion test results of the textiles in Example 1 of the present application. DETAILED DESCRIPTION

[0023] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the accompanying drawings are intended to cover non-exclusive inclusions. In the description of the embodiments of this application, "a plurality" means more than two, unless otherwise specifically defined.

[0025] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0027] For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0028] With the rapid development of functional textiles, depositing nanometal layers (such as copper, silver, and aluminum) on textile surfaces to impart conductivity, electromagnetic shielding, or decorative properties has become a research hotspot in the textile field. However, due to the inherent softness, roughness, and high porosity of textiles, the nanometal layers have poor adhesion to the textile surface, making them susceptible to shedding and wear during use or washing, significantly limiting the application of metallized functional textiles. Prior art methods for improving the adhesion of nanometal layers on textile surfaces by introducing adhesive materials not only affect the textile's inherent properties, such as breathability and comfort, but also suffer from complex processes, weak bonding, and poor durability, leading to poor reproducibility and a short service life of metallized functional textiles. Furthermore, conventional methods for improving the adhesion of nanometal layers, including plasma surface treatment, can significantly damage the textile surface and properties, and the high processing costs make them difficult to commercialize and apply.

[0029] In order to solve the technical problem that the interface bonding force between the nano-metal coating of the textile and the fabric substrate is poor, and the wear resistance and washability are poor, and the existing introduction of adhesive materials will affect the infrared reflectivity of the nano-metal coating textile. The present application provides a method and application for enhancing the infrared reflectivity of the textile, wherein the method uses atomic layer deposition technology to deposit a metal oxide coating on the surface of the nano-metal coating of the textile, forming a wrapping layer between the surface of the textile yarn and the metal particles, which not only significantly improves the interface bonding force between the nano-metal coating and the textile, but also enhances the wear resistance, washability and infrared reflectivity of the nano-metal coating textile, can effectively protect the nano-metal coating from friction damage, and will not adversely affect the original properties of the textile and the nano-metal coating; the method has simple process, low cost, good prospects for industrial application, will not damage the inherent properties of the textile, significantly improves the adhesion of the nano-metal coating on the textile surface, has good durability, and makes the metallized functional textile have good repeatability, long service life and strong practicality.

[0030] For the convenience of description, the following embodiments are described by taking a method and application of enhancing infrared reflectivity of a textile according to an embodiment of the present application as an example.

[0031] In one aspect, an embodiment of the present application provides a method for enhancing the infrared reflectivity of a textile, comprising pre-treating a textile having a nano-metal coating deposited on its surface, and then depositing a metal oxide coating on the surface of the nano-metal coating using atomic layer deposition (ALD) technology, wherein the thickness of the metal oxide coating is 5 to 50 nm.

[0032] This embodiment uses atomic layer deposition technology to deposit a metal oxide coating on the surface of the textile's nanometal coating. This metal oxide coating forms a wrapping layer between the textile yarn surface and the nanometal particles. This not only significantly improves the interfacial bonding between the nanometal coating and the textile, but also enhances the wear resistance, washability, and infrared reflectivity of the nanometal-coated textile. It effectively protects the nanometal coating from friction damage, making it less susceptible to shedding and wear during subsequent use or washing of the textile, thereby improving the overall shape retention and infrared thermal insulation properties of the textile without adversely affecting the original properties of the textile or the nanometal coating. Compared with existing technologies that introduce adhesives or use plasma surface treatment technology, the method of this embodiment has simple processes, low costs, and good industrial application prospects. It does not damage the inherent properties of the textile, such as breathability and comfort, and significantly improves the adhesion of the nanometal coating to the textile surface, providing good durability. This results in good repeatability, long service life, and strong practicality of the metallized functional textile.

[0033] Furthermore, in some embodiments, the textile with the nano-metal coating deposited on its surface has high infrared reflectivity, with an infrared reflectivity of more than 80%. The metal oxide coating is a layer of material comprising one or more of titanium dioxide, zinc oxide, aluminum oxide, and silicon oxide.

[0034] In the technical solution of this embodiment of the present application, the nano-metal coating is a material with high infrared reflective properties, which gives the textile high infrared reflective properties, so that it can be used in the field of thermal insulation and temperature-regulating textiles. After the metal oxide coating is deposited on the surface of the nano-metal coating, it not only does not affect the infrared reflective properties of the nano-metal coating, but because the selected deposited metal oxide coating has high infrared transmittance, it plays a role in enhancing the infrared reflective properties of the nano-metal coating textile, thereby comprehensively improving the infrared thermal insulation performance of the textile; in this way, the technical defect of using an adhesive layer to composite the nano-metal coating and the fabric substrate, which will have an adverse effect on the infrared reflective properties of the nano-metal coating, is overcome.

[0035] Furthermore, in some embodiments, the deposition temperature of the atomic layer deposition technology is 80-150°C.

[0036] In the technical solution of this embodiment of the present application, low-temperature atomic layer deposition technology is adopted. The process is mild and suitable for processing natural or synthetic fiber textiles. It is suitable for flexible fabric substrates with surface deposition of nano-metal coatings, avoiding damage to the interface bonding between the nano-metal coating and the textile and the structure and performance of the textile itself caused by high-temperature treatment.

[0037] Furthermore, in some embodiments, the method for enhancing infrared reflectivity of a textile comprises the following steps: S1. Pre-treating a textile with a nano-metal coating deposited on its surface and placing it on a sample stage in a reaction chamber of an atomic layer deposition device; S2. Evacuate the reaction chamber, set the deposition temperature to 80-150°C, set the cycle parameters, and alternately introduce the metal source and the oxidant into the reaction chamber. After multiple cycles, a metal oxide coating with a thickness of 5-50 nm is obtained on the surface of the nano-metal coating of the textile, thus obtaining a strong infrared reflective textile; cycle parameters: each cycle includes a 1-second precursor pulse, a 10-second nitrogen purge, a 1-second oxidant pulse, and a 10-second nitrogen purge, the precursor is the metal source, and the oxidant is water vapor as the oxidant; the number of cycles is 200-800 times.

[0038] In the technical solution of this embodiment of the present application, atomic layer deposition technology is used to obtain a metal oxide coating with a certain thickness on the surface of the nano-metal coating of the textile. The thickness is precisely controllable, and the metal oxide coating has a strong covering ability and excellent three-dimensional surface coating ability, which greatly improves the bonding performance between the nano-metal coating and the textile, and does not adversely affect the performance of the textile and the nano-metal coating. This method has a simple process, wide applicability, and is suitable for industrial promotion and production.

[0039] Furthermore, in some embodiments, in step S1, the nanometal coating is a metal layer formed of one or more of copper, silver, aluminum, and titanium. The nanometal coating is a silver layer or an aluminum layer, the metal source is titanium tetrachloride, and the oxidant is water vapor, and the resulting wear-resistant and water-resistant metal oxide coating is a titanium dioxide layer.

[0040] In the technical solution of this embodiment of the present application, the nano-metal coating is made of a metal material with certain high infrared reflective properties, which is combined with the infrared transmittance of the metal oxide coating to synergistically improve the infrared reflective properties of the final textile. In addition, when the nano-metal coating is a silver layer or an aluminum layer, a titanium dioxide layer is deposited on its surface, which can greatly enhance the infrared reflective properties of the nano-metal coated textile, thereby obtaining a textile with excellent infrared thermal insulation properties.

[0041] Furthermore, in some embodiments, in step S1, the pretreatment is to ultrasonically clean the textile with the nano-metal coating deposited on the surface with deionized water and ethanol solution for 8 to 12 minutes respectively, and then dry it at 70 to 90°C.

[0042] In some embodiments, in step S2, the strong infrared reflective textile comprises a textile having a nano-metal coating deposited on its surface, and a metal oxide coating deposited on the surface of the nano-metal coating, wherein the thickness of the metal oxide coating is 5-50 nm.

[0043] In the second aspect, an embodiment of the present application provides an application of a method for enhancing the infrared reflectivity of a textile. The method is applied to a textile with a nano-metal coating deposited on the surface to enhance the interfacial bonding force between the nano-metal coating and the textile, improve the wear resistance and water wash resistance of the nano-metal coating, and improve the infrared reflectivity of the nano-metal coated textile.

[0044] In the technical solution of the embodiment of the present application, the method has a simple process, a wide range of types of fabric substrates, nano-metal coatings and metal oxide coatings, and can be applied to the deposition of various textile materials and various metal materials, and has wide applicability.

[0045] Some specific examples are listed below. It should be noted that the examples described below are exemplary and are only used to explain the present application, and should not be construed as limiting the present application. Where specific techniques or conditions are not specified in the examples, the techniques or conditions described in the literature in this area or the product specifications are used. Reagents or instruments used without manufacturer's indication are all commercially available conventional products.

[0046] Example 1 This embodiment provides a method for enhancing infrared reflectivity of a textile, which specifically includes the following steps: S1. Placing a polyester textile with a nano-aluminum metal coating on its surface on a sample stage in a reaction chamber of an atomic layer deposition device; S2. Evacuate the reaction chamber, set the deposition temperature to 100°C, set the cycle parameters (each cycle includes a 1-second precursor pulse, a 10-second nitrogen purge, a 1-second oxidant pulse, and a 10-second nitrogen purge), and alternately introduce the precursor (titanium tetrachloride TiCl4) and the oxidant (water vapor) into the reaction chamber. After 500 cycles, a TiO2 coating with a thickness of 20 nm is obtained on the surface of the nanometal coating on the textile.

[0047] See also Figure 1 The infrared reflectivity of the polyester textile with nano-metal coating deposited on the surface in Example 1 and the polyester textile with TiO2 coating deposited on the surface of the nano-metal coating were tested, and the results were as follows: Figure 1 As shown in the figure, Sample 1 is a polyester textile with a nanometal coating deposited on its surface, while Sample 2 is a polyester textile with a TiO2 coating deposited on the nanometal coating. As can be seen from the figure, the deposition of the TiO2 coating not only does not reduce the infrared reflectivity of the nanometal-coated textile, but actually enhances it, facilitating its application in infrared thermal insulation and temperature-regulating fabrics.

[0048] See also Figure 2 The results of Martindale abrasion tests on a polyester textile (Sample 1) coated with a nanometal coating in Example 1 and a polyester textile (Sample 2) coated with TiO2, prepared using 500 atomic deposition cycles. The abrasion test employed in this application involved placing Sample 1 (one side coated with nanometal) and Sample 2 (one side coated with metal oxide) face-down on a piece of white paper. A 260g weight was placed on each textile. After applying the same pressure and number of friction cycles, the color change of the paper was observed. Figure 2In the figure, the left side shows white paper after being rubbed against a polyester textile with a nano-metal coating deposited on the surface, and the right side shows white paper after being rubbed against a polyester textile with a TiO2 metal oxide coating deposited on the surface of the nano-metal coating. It can be seen that the white paper on the left has a distinct metallic color and is darker in color, while the white paper on the right has no obvious metallic color on its surface, indicating that the TiO2 coating is dense and has high hardness, which can effectively protect the nano-metal coating of the polyester textile from friction damage and improve its wear resistance.

[0049] Example 2 This embodiment provides a method for enhancing the infrared reflectivity of a textile. Compared with Example 1, the difference is that the surface of the polyester textile is coated with a nano-silver metal coating. The rest is substantially the same as Example 1 and will not be repeated here.

[0050] Example 3 This embodiment provides a method for enhancing the infrared reflectivity of a textile. Compared with Example 1, the difference is that in step S2, a precursor (trimethylaluminum) and an oxidant (water vapor) are alternately introduced into the reaction chamber to obtain an aluminum oxide coating with a thickness of 20 nm on the surface of the nanometal coating of the textile. The rest is substantially the same as in Example 1 and will not be repeated here.

[0051] Comparative Example 1 Comparative Example 1 provides a method for metal-coated textiles, in which an adhesive (polyurethane) is introduced between the nano-aluminum metal coating and the polyester textile substrate by coating to improve the bonding strength between the two.

[0052] The textiles treated by the methods of Examples 1-3 and Comparative Example 1, and the polyester textile with a nano-aluminum metal coating deposited on its surface in Example 1 (Sample 1) were subjected to infrared reflectivity and abrasion resistance tests, as well as infrared reflectivity tests after washing for 30 minutes. The results are shown in the following table.

[0053] Table 1 Textile properties of Examples 1 to 3 and Comparative Example 1 As shown in Table 1, by comparing the changes in infrared reflectivity of the textile coating after abrasion resistance testing and after washing, the changes in the bonding strength, wear resistance, and washability of the textile and nanometal coating can be summarized. It was found that for textiles with nano-aluminum or silver metal coatings deposited on their surfaces, the deposition of a TiO2 or aluminum oxide coating on the nanometal coating surface enhanced the interfacial bonding strength between the nanometal coating and the textile, thereby improving the wear resistance, washability, and infrared reflectivity of the metal-functional textile, resulting in a textile with even better infrared thermal insulation performance. While the introduction of an adhesive in Comparative Example 1 temporarily promoted the bonding of the nanometal coating to the textile, it adversely affected the original infrared reflectivity of the textile nanometal coating, failing to enhance the infrared thermal insulation performance of the textile. Furthermore, the wear resistance and washability of the nanometal coating were also relatively poor.

[0054] Example 4 This embodiment provides a method for enhancing the infrared reflectivity of textiles. Compared with Example 1, the difference is that in step S2, the deposition temperature is 150°C. The rest is substantially the same as Example 1 and will not be repeated here.

[0055] Comparative Example 2 Comparative Example 2 provides a method for enhancing the infrared reflectivity of textiles. Compared with Example 1, the difference is that in step S2, the deposition temperature is 50°C. The rest is roughly the same as Example 1 and will not be repeated here.

[0056] Comparative Example 3 Comparative Example 3 provides a method for enhancing the infrared reflectivity of textiles. Compared with Example 1, the difference is that in step S2, the deposition temperature is 180°C. The rest is roughly the same as Example 1 and will not be repeated here.

[0057] Comparative Example 4 Comparative Example 4 provides a method for enhancing the infrared reflectivity of textiles. Compared with Example 1, the difference is that in step S2, the number of cycles is 50 times, and the thickness of the obtained metal oxide coating is 2 nm. The rest is roughly the same as Example 1 and will not be repeated here.

[0058] Comparative Example 5 Comparative Example 5 provides a method for enhancing the infrared reflectivity of a textile. Compared with Example 1, the difference is that in step S2, the number of cycles is 1000, and the thickness of the obtained metal oxide coating is 60 nm. The rest is roughly the same as Example 1 and will not be repeated here.

[0059] The textiles treated by the methods of Example 4 and Comparative Examples 2 to 5 were subjected to infrared reflectivity and abrasion resistance tests, as well as infrared reflectivity tests after washing for 30 minutes. The results are shown in the following table.

[0060] Table 2 Textile properties of Example 4 and Comparative Examples 2 to 5 Table 2 shows that by comparing the infrared reflectivity of the textile coating after abrasion testing and after washing, the changes in the bonding strength, wear resistance, and washability of the textile to the nanometal coating can be summarized. It was found that when the deposition temperature is too low, the deposition of the metal oxide coating on the textile nanometal coating surface is affected, failing to enhance the textile's infrared reflectivity and making it difficult to obtain a textile with strong bonding strength, good wear resistance, and good washability. When the deposition temperature is too high, the textile's structure and mechanical properties are damaged, which also affects the bonding strength of the nanometal coating to the textile. A low number of cycles results in a thin metal oxide coating, which is unable to fully exert its role in improving the interfacial bonding between the nanometal coating and the textile, as well as its wear resistance and washability, and enhancing the textile's infrared thermal insulation properties. A high number of cycles results in a thicker metal oxide coating on the textile surface. While this improves the bonding strength, wear resistance, and washability of the nanometal coating to the textile, it also affects the textile's breathability and softness, hindering its subsequent application.

[0061] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are merely examples, and any embodiments having substantially the same structure and effect as the technical concept within the scope of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the present application, any other embodiments that can be conceived by those skilled in the art and that combine some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A method for enhancing the infrared reflectivity of a textile, characterized in that: A metal oxide coating is deposited on the surface of a textile having a nano-metal coating by using an atomic layer deposition technique. The thickness of the metal oxide coating is 5 to 50 nm.

2. The method for enhancing infrared reflectivity of textiles according to claim 1, characterized in that: The infrared reflectivity of textiles with nano-metal coating deposited on the surface is over 80%.

3. The method for enhancing infrared reflectivity of textiles according to claim 1, characterized in that: The metal oxide coating is a material layer containing one or more metal oxides selected from titanium dioxide, zinc oxide, aluminum oxide, and silicon oxide.

4. The method for enhancing infrared reflectivity of textiles according to claim 1, characterized in that: The deposition temperature of the atomic layer deposition technology is 80~150°C.

5. The method for enhancing infrared reflectivity of textiles according to claim 1, characterized in that: The method specifically comprises the following steps: S1. Pre-treating a textile with a nano-metal coating deposited on its surface and placing it on a sample stage in a reaction chamber of an atomic layer deposition device; S2. Evacuate the reaction chamber, set the deposition temperature to 80-150°C, set the cycle parameters, and alternately introduce the metal source and the oxidant into the reaction chamber. After multiple cycles, a metal oxide coating with a thickness of 5-50 nm is obtained on the surface of the nano-metal coating of the textile, thus obtaining a strong infrared reflective textile.

6. The method for enhancing infrared reflectivity of textiles according to claim 5, characterized in that: In step S2, the cycle parameters are as follows: each cycle includes a 1-second precursor pulse, a 10-second nitrogen purge, a 1-second oxidant pulse, and a 10-second nitrogen purge. The precursor is a metal source, the oxidant is water vapor, and the number of cycles is 200-800.

7. The method for enhancing infrared reflectivity of textiles according to claim 5, characterized in that: In step S1, the nano-metal coating is a metal layer formed by one or more of copper, silver, aluminum, and titanium.

8. The method for enhancing infrared reflectivity of textiles according to claim 7, characterized in that: The nano metal coating is a silver layer or an aluminum layer, the metal source is titanium tetrachloride, and the oxidant is water vapor, and the obtained wear-resistant and water-resistant metal oxide coating is a titanium dioxide layer.

9. The method for enhancing infrared reflectivity of textiles according to claim 5, characterized in that: In step S2, the strong infrared reflective textile comprises a textile with a nano-metal coating deposited on the surface, and a metal oxide coating deposited on the surface of the nano-metal coating, wherein the thickness of the metal oxide coating is 5-50 nm.

10. Use of the method for enhancing infrared reflectivity of textiles according to any one of claims 1 to 9, characterized in that: This method is applied to textiles with nano-metal coatings deposited on their surfaces to enhance the interfacial bonding between the nano-metal coatings and the textiles, improve the wear resistance and washability of the nano-metal coatings, and improve the infrared reflectivity of the nano-metal coating textiles.

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