Photo-thermal conversion thermal fabric

Abstract

The utility model provides a photothermal conversion warm-keeping fabric which is of a double-layer composite structure and comprises a light absorption layer and a heat reflection layer. A hollow heat insulation material is arranged between the light absorption layer and the heat reflection layer. By combining the heat reflection layer and the light absorption layer, the fabric can effectively reflect heat emitted by a human body, reduce heat loss, absorb external light energy and convert the light energy into heat energy, improve the warm keeping effect, increase the volume of a static air layer through the hollow heat insulation material, and further improve the warm keeping effect on the premise of not influencing the flexibility of the fabric. Through the textile technology and material combination, the warm-keeping fabric is efficient, warm-keeping, comfortable and environment-friendly, and has wide application prospects and commercial value.

Description

TECHNICAL FIELD

[0001] The utility model relates to a textile technology field especially relates to a light heat conversion warm keeping fabric. BACKGROUND

[0002] Natural materials such as silk, cotton, hemp, etc. are widely used in traditional textile field to realize the warmth and comfort of clothes. Traditional warm clothes often rely on heavy material and multi-layer superposition to achieve the warm-keeping effect, which not only limits the freedom of the wearer, but also increases the thickness of the clothes. Therefore, traditional textiles have been difficult to meet the modern diversified and functional needs, especially in the field of outdoor sports, medical care, etc. Higher requirements are put forward for the warmth, air permeability and moisture permeability of textiles. Traditional warm-keeping materials, such as pure cotton fabric, although have good air permeability and moisture permeability, but its warm-keeping performance is limited in extreme climate conditions, and it is difficult to effectively isolate the influence of the external low temperature environment on the human body. And some high-tech materials, such as Mylar blanket (polyester film blanket), although can provide better heat insulation effect, but its air permeability is poor, and long-term use can easily cause human body discomfort.

[0003] In order to adjust the heat exchange (infrared radiation flow) between human body and surrounding environment, the advanced material with human body thermal radiation control function has attracted wide attention. Infrared transparent radiation textiles, emissive radiation textiles, solar reflective radiation refrigeration textiles and electrically conductive refrigeration textiles with enhanced thermal conductivity have achieved certain results in keeping cool in warm environment. On the contrary, in cold climate, there is an urgent need for textiles with warming effect to reduce heat loss to the surrounding environment. At present, heat insulation materials such as porous aerogel fibers and infrared reflective materials combined with metal particles and metal wires have achieved certain results in reducing heat loss. However, there are still technical bottlenecks to realize the self-heating function of textiles to compensate for the heat dissipation of infrared radiation. Therefore, the development of textiles with self-heating function has become a research hotspot.

[0004] Therefore, it is necessary to design an improved light heat conversion warm keeping fabric to solve the above problems. UTILITY MODEL CONTENT

[0005] In view of the defects of the prior art, the utility model aims at providing a light heat conversion warm keeping fabric, which is knitted with double-layer structure by using light-absorbing yarn and heat-reflecting yarn, and combined with hollow tubular heat insulation material to increase light absorption and improve warm-keeping effect.

[0006] In order to achieve the above purpose, the utility model provides a light heat conversion warm keeping fabric, which is a double-layer composite structure, comprising a light-absorbing layer and a heat-reflecting layer; a hollow heat insulation material is arranged between the light-absorbing layer and the heat-reflecting layer.

[0007] As a further improvement of the present application, the thickness of the light-absorbing layer is 1-2mm, and the thickness of the heat-reflecting layer is 1-2mm.

[0008] As a further improvement of the present application, the light-heat conversion warm-keeping fabric is composed of plain weave sections and linking weave sections arranged alternately, the length of the plain weave sections is 0.5-1mm, the length of the linking weave sections is 4-5mm, and the hollow heat-insulating material is arranged in the linking weave sections.

[0009] As a further improvement of the present application, the light-absorbing layer is composed of light-absorbing yarns, and the light-absorbing yarns include non-light-absorbing yarns and light-absorbing materials loaded on the surfaces of the non-light-absorbing yarns.

[0010] As a further improvement of the present application, the hollow heat-insulating material is one of hollow silica gel tubes, polyethylene hollow tubes and polyurethane hollow tubes.

[0011] As a further improvement of the present application, the inner diameter of the hollow heat-insulating material is 0.4-0.8mm.

[0012] As a further improvement of the present application, the light-absorbing material is one of carbonized tubes, graphene, carbonized zirconium, polypyrrole and carbon black, and the non-light-absorbing yarns are one of cotton fibers, wool fibers, silk fibers and regenerated cellulose fibers.

[0013] As a further improvement of the present application, the heat-reflecting layer is composed of heat-reflecting yarns, and the heat-reflecting yarns include fiber substrates and metal substances loaded on the surfaces of the fiber substrates.

[0014] As a further improvement of the present application, the fiber substrates are natural fibers or chemical fibers, the natural fibers are one of cotton fibers, wool fibers and silk fibers, and the chemical fibers are one of polyester fibers, acrylic fibers and regenerated cellulose fibers.

[0015] As a further improvement of the present application, the metal substances include one of metal elements and oxides, hydroxides, carbides, nitrides and sulfides of the metal elements, and the metal elements are one of silver, aluminum, copper, gold, nickel, chromium and titanium.

[0016] The present application has the following advantages:

[0017] The utility model provides a kind of light-heat conversion warm-keeping fabric, the fabric is double-layer composite structure, including light-absorbing layer and heat reflecting layer;Hollow thermal insulation material is arranged between light-absorbing layer and heat reflecting layer.The utility model uses double-sided design to couple superimpose optics and thermology, change the mutual radiation energy exchange between skin, fabric and environment, increase light-absorbing property in combination with hollow thermal insulation material, improve warm-keeping effect.The fabric preparation process provided by the utility model is simple, provides a kind of efficient warm-keeping, comfortable and environment-friendly warm-keeping fabric by textile technology and material combination, with wide application prospect and commercial value.

[0018] The utility model discloses a kind of warm-keeping fabric provided by the utility model, which is prepared by combining heat-reflecting yarn and light-absorbing yarn, and the fabric can effectively reflect the heat emitted by human body, reduce heat loss, while absorbing external light energy to convert into heat energy, so as to improve the warm-keeping effect.The light-absorbing yarn absorbs light energy to convert into heat energy, achieving effective management and utilization of heat.

[0019] The utility model discloses a kind of warm-keeping fabric provided by the utility model, which is prepared by combining heat-reflecting yarn and light-absorbing yarn, and the fabric can effectively reflect the heat emitted by human body, reduce heat loss, while absorbing external light energy to convert into heat energy, so as to improve the warm-keeping effect.The light-absorbing yarn absorbs light energy to convert into heat energy, achieving effective management and utilization of heat. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 For the structure diagram of the light-heat conversion warm-keeping fabric provided by the utility model.

[0021] Figure 2 For the cross-sectional view of the light-heat conversion warm-keeping fabric provided by the utility model.

[0022] Figure 3 For the cross-sectional 3D microscope view of the light-heat conversion warm-keeping fabric provided by the utility model embodiment 1.

[0023] Figure 4 For the solar absorption spectrum graph of the warm-keeping fabric provided by the utility model embodiment 1 and comparative example 1.

[0024] Figure 5 For the heat insulation effect of the warm-keeping fabric provided by the utility model embodiment 1 and comparative example 2 under 100W / m 2 heating power.

[0025] Figure 6 For the heat insulation effect of the warm-keeping fabric provided by the utility model embodiment 1 and comparative example 2 under 200W / m 2 heating power.

[0026] Figure 7 For the heat insulation effect of the warm-keeping fabric provided by the utility model embodiment 1 and comparative example 2 under 300W / m 2 heating power.

[0027] Figure 8 The warm-keeping fabric provided for the embodiment 1 and the comparative example 1 and the comparative example 3 of the utility model provides the sunny temperature insulation data.

[0028] Figure 9 The air permeability test result of the warm-keeping fabric provided for the embodiment 1 and the comparative example 1 and the comparative example 3 of the utility model.

[0029] Figure 10 The moisture permeability test result of the warm-keeping fabric provided for the embodiment 1 and the comparative example 1 and the comparative example 3 of the utility model.

[0030] Reference signs

[0031] 1, light absorption layer;2, hollow thermal insulation material;3, heat reflection layer. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model is described in detail below with the help of the drawings and specific embodiments.

[0033] Here, it also needs to be explained that, in order to avoid the fact that unnecessary details obscure the utility model, only the structures and / or processing steps closely related to the scheme of the utility model are shown in the drawings, and other details not closely related to the utility model are omitted.

[0034] In addition, it also needs to be explained that the term "comprises", "includes" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0035] The utility model provides a kind of light-heat conversion warm-keeping fabric, the fabric is double-layer composite structure, including light absorption layer 1 and heat reflection layer 3;Light absorption layer 1 and heat reflection layer 3 between being provided with hollow thermal insulation material 2, its structural schematic diagram as shown in Figure 1 As shown in Figure 2 Light absorption layer 1 is 1~2mm thick, and heat reflection layer 3 is 1~2mm thick.Light-heat conversion warm-keeping fabric is composed of plain weave section and interlocking weave section staggered arrangement, and the length of plain weave section is 0.5~1mm, and the length of interlocking weave section is 4~5mm, and hollow thermal insulation material 2 is arranged between the upper and lower layers of the interlocking weave of light absorption layer 1 and the interlocking weave of heat reflection layer 3.

[0036] By combining the light-absorbing layer 1 and the heat-reflecting layer 3, the fabric can effectively absorb external light energy and convert it into heat energy, while reflecting the heat emitted by the human body, reducing heat loss, and achieving high-efficiency warmth. The use of hollow thermal insulation material 2 not only improves the warmth, but also maintains the lightness of the fabric, making it more comfortable to wear. By utilizing optical thermal coupling technology, the fabric can reduce dependence on traditional energy sources to some extent, with energy-saving and environmentally friendly characteristics. The staggered arrangement of the plain weave section and the stitch section, as well as the placement of the hollow thermal insulation material 2 between the stitches, enhances the structural stability and durability of the fabric.

[0037] The light-absorbing layer 1 is composed of light-absorbing yarn, which includes non-light-absorbing yarn and light-absorbing material loaded on its surface. The light-absorbing material is one of carbonized tubes, graphene, zirconium carbide, polypyrrole, and carbon black; the non-light-absorbing yarn is one of cotton fiber, wool fiber, silk fiber, and regenerated cellulose fiber.

[0038] The hollow thermal insulation material 2 is one of hollow silica gel tubes, polyethylene hollow tubes, and polyurethane hollow tubes. The inner diameter of the hollow thermal insulation material 2 is 0.4-0.8mm. By placing the hollow thermal insulation material 2 in the double-layer fabric, the volume of the static air layer is increased, effectively reducing heat loss, and the hollow tubular structure helps maintain the breathability of the fabric, improving the warmth effect without affecting the flexibility of the fabric.

[0039] The heat-reflecting layer 3 is composed of heat-reflecting yarn, which includes fiber base material and metal substance loaded on its surface. The fiber base material is natural fiber or chemical fiber, the natural fiber is one of cotton fiber, wool fiber, silk fiber; the chemical fiber is one of polyester, acrylic, and regenerated cellulose fiber. The metal substance includes one of metal elements and their oxides, hydroxides, carbides, nitrides, and sulfides, the metal element is one of silver, aluminum, copper, gold, nickel, chromium, and titanium. By depositing metal or metal compounds on the fiber surface, the fiber can reflect heat radiation and provide thermal insulation effect.

[0040] The preparation method of the light-heat conversion warm-keeping fabric provided by the utility model has the advantages of simple process, low cost, and high efficiency.

[0041] The light-absorbing yarn and the heat-reflecting yarn are woven into a double-layer structure with one side as the heat-reflecting layer 3 and the other side as the light-absorbing layer 1 by using textile technology, and the hollow thermal insulation material 2 is placed as weft filling in the double-layer structure to obtain the light-heat conversion warm-keeping fabric.

[0042] The textile process is weaving or knitting. The weaving method is as follows: the heat-reflecting yarn and the light-absorbing yarn are used as warp yarns, a double-layer interlocking structure is adopted, and the heat-reflecting yarn, the light-absorbing yarn and the hollow thermal insulation material 2 are woven into a double-faced core-filled fabric; the knitting method is as follows: the heat-reflecting yarn and the light-absorbing yarn are used as main yarns, a weft knitting method is adopted, and the hollow thermal insulation material 2 is used as a core yarn to perform weft insertion knitting, so that a double-faced core-filled fabric is obtained.

[0043] The light-heat conversion warm-keeping fabric provided by the utility model will be described below in combination with specific examples.

[0044] Example 1

[0045] Example 1 provides a light-heat conversion warm-keeping fabric, which comprises a light-absorbing layer 1 and a heat-reflecting layer 3, and a hollow thermal insulation material 2 is arranged between the light-absorbing layer 1 and the heat-reflecting layer 3. The preparation method comprises the following steps:

[0046] S1. After the cotton yarn is immersed in a polypyrrole solution for 30 min, it is placed in a 5% ferric chloride solution and subjected to magnetic stirring for 2 h, and then dried at 60℃ for 2 h to obtain a light-absorbing yarn;

[0047] S2. The silver-plated yarn and the light-absorbing yarn are used as warp yarns, and the harnesses are arranged in the order of 1, 5, 2, 6, 3, 7, 4 and 8; the silver-plated yarn is used as the warp yarn on the surface, the light-absorbing yarn is used as the warp yarn inside, and a double-layer interlocking structure is adopted on the knitting machine; during the weft knitting process, the surface warp yarn is interwoven with the silver-plated yarn, and the inside warp yarn is interwoven with the light-absorbing yarn; after 3 mm of weaving, a hollow silica gel tube with an inner diameter of 0.5 mm is filled in, and a plain weave structure is adopted; then, a surface-internal interlocking structure is adopted, and the above operation is repeated to complete the weaving of the double-faced core-filled fabric, so that the light-heat conversion warm-keeping fabric is obtained; the thicknesses of the light-absorbing layer 1 and the heat-reflecting layer 3 are both 2 mm; and the cross-sectional 3D microscope image of the warm-keeping fabric is as shown in Figure 3 It can be seen that the prepared light-heat conversion warm-keeping fabric has a double-layer structure, and a hollow silica gel tube is arranged in the middle.

[0048] Comparative Example 1

[0049] Comparative Example 1 provides a light-heat conversion warm-keeping fabric, which is different from Example 1 only in that the light-absorbing yarn is a cotton yarn without surface modification treatment, and other experimental parameters and conditions are basically the same as those of Example 1, which will not be described herein again.

[0050] Comparative Example 2

[0051] Comparative Example 2 provides a light-heat conversion warm-keeping fabric, which is different from Example 1 only in that no hollow silica gel tube is added, and other experimental parameters and conditions are basically the same as those of Example 1, which will not be described herein again.

[0052] Comparative Example 3

[0053] Comparative Example 3 is a commercially available Mylar blanket sample.

[0054] The light-heat conversion warm-keeping fabric provided by the utility model is cut according to the required size and shape, and the area size of each fabric is uniform. For example Figure 4 As shown in the solar absorption spectrum diagram of the light-heat conversion warm-keeping fabric provided by the utility model embodiment 1 and comparative example 1, it can be seen that the sample of embodiment 1 has an absorption percentage close to 100%, and remains relatively stable in the entire wavelength range, which indicates that the sample of embodiment 1 has extremely high absorption capacity for solar radiation, and can effectively absorb the heat in the solar radiation. This high absorption capacity is related to the special composition or structure of the sample, which enables it to maximize the use of solar radiation to provide a warm-keeping effect; the absorption percentage of the sample of comparative example 1 fluctuates around 50%, which indicates that the sample of comparative example 1 has relatively low absorption capacity for solar radiation, and changes with the wavelength, affecting the absorption efficiency of solar radiation.

[0055] The temperature insulation performance test is carried out under the condition that the indoor environment temperature is 22℃, as shown in Figures 5 to 7 The temperature insulation performance of the thermal coupling warm-keeping fabric and the sample of comparative example 2 without a silica gel tube filling core is tested by using a heating body with a power of 100W, 200W and 300W respectively, and the results show that the temperature insulation effect of the warm-keeping fabric with a silica gel tube of the utility model is higher than that without a silica gel tube by about 2℃, and has excellent warm-keeping performance.

[0056] Figure 8 The outdoor temperature insulation data of the warm-keeping fabric provided by embodiment 1 and comparative examples 1 and 3 can be seen that the fabric of the present application has a temperature difference of more than 10℃ and 5℃ compared with the sample of pure cotton without special treatment and the Mylar blanket sample, respectively, which indicates that its temperature insulation effect under natural sunlight conditions is significant.

[0057] Figure 9 The air permeability test results of the warm-keeping fabric provided by embodiment 1 and comparative examples 1 and 3 can be seen that the air permeability of the light-heat conversion warm-keeping fabric provided by the present application is excellent compared with the Mylar blanket sample and the same thickness pure cotton woven fabric.

[0058] Figure 10 The moisture permeability test results of the warm-keeping fabric provided by embodiment 1 and comparative examples 1 and 3 can be seen that the moisture permeability of the light-heat conversion warm-keeping fabric provided by the present application is close to that of pure cotton fabric, which indicates that the fabric of the utility model successfully maintains good moisture permeability while enhancing the warm-keeping performance, achieving the balance of functionality and comfort.

[0059] In conclusion, the utility model discloses a double -sided design couples with the heat coupling superposition of optics, can effectively reflect the heat that human body emits, reduces the heat loss, absorbs external light energy conversion into heat energy simultaneously, improves the warm -keeping effect, increases the still air layer volume with hollow heat -insulating material 2, further improved the warm -keeping effect.

[0060] The above examples are only used to illustrate the technical solutions of the utility model and not limit, although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or equivalent replaced, and do not depart from the spirit and scope of the technical solutions of the utility model.

Claims

1. A photothermal conversion thermal retaining fabric, characterized by, The light-heat conversion warm-keeping fabric is a double-layer composite structure, comprising a light-absorbing layer and a heat-reflecting layer; a hollow heat-insulating material is arranged between the light-absorbing layer and the heat-reflecting layer; the thickness of the light-absorbing layer is 1-2 mm, and the thickness of the heat-reflecting layer is 1-2 mm. The light-heat conversion warm-keeping fabric is composed of plain weave sections and linking weave sections arranged alternately, the length of the plain weave section is 0.5-1 mm, the length of the linking weave section is 4-5 mm, and the hollow heat-insulating material is arranged in the linking weave section. The hollow heat-insulating material is one of a hollow silica gel tube, a polyethylene hollow tube and a polyurethane hollow tube; the inner diameter of the hollow heat-insulating material is 0.4-0.8 mm.

2. The photothermal conversion thermal management fabric of claim 1, wherein, The light-absorbing layer is composed of light-absorbing yarns, the light-absorbing yarns comprising non-light-absorbing yarns and light-absorbing materials loaded on the surface of the non-light-absorbing yarns.

3. The photothermal conversion thermal management fabric of claim 2, wherein, The light-absorbing materials are one of carbonized tubes, graphene, zirconium carbide, polypyrrole and carbon black; the non-light-absorbing yarns are one of cotton fibers, wool fibers, silk fibers and regenerated cellulose fibers.

4. The photothermal conversion thermal management fabric of claim 1, wherein, The heat-reflecting layer is composed of heat-reflecting yarns, the heat-reflecting yarns comprising fiber substrates and metal substances loaded on the surface of the fiber substrates.

5. The photothermal conversion thermal management fabric of claim 4, wherein, The fiber substrates are natural fibers or chemical fibers, the natural fibers are one of cotton fibers, wool fibers and silk fibers; the chemical fibers are one of polyester, acrylic and regenerated cellulose fibers.

6. The photothermal conversion thermal management fabric of claim 5, wherein, The metal substances comprise one of metal elements and oxides, hydroxides, carbides, nitrides and sulfides of the metal elements, the metal elements are one of silver, aluminum, copper, gold, nickel, chromium and titanium.

Images