Transparent flexible heating optical device

Abstract

The utility model discloses a transparent flexible heating optical device, which comprises a transparent substrate layer, a nano-silver transparent conductive film layer, an electrode layer, a coating layer and a protective layer which are sequentially attached and connected, and the electrode layer can be electrically connected with an external power supply to electrically heat the nano-silver transparent conductive film layer. The optical transmittance of the heating optical device reaches 88% or above, the resistance is smaller than 50 ohms, and the heating optical device has good flexibility. Besides, the coating layer and the protective layer can provide dual protection effects for the nano-silver transparent conductive film layer and the electrode layer, and the thermal stability of the heating optical device is improved, so that the heating optical device meets the requirement that the high-temperature and high-humidity stability duration is greater than 500hrs under the condition of long-term power-on heating. Therefore, the heating optical device has the advantages of being good in flexibility, high in optical transmittance, good in conductivity and good in high-temperature and high-humidity stability under the long-term power-on condition, and the flexibility, the optical transmittance, the conductivity and the high-temperature and high-humidity stability can be considered at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of heating optical devices, in particular to a transparent flexible heating optical device. Background Art

[0002] In the prior art, some heating optical devices use indium tin oxide as a transparent conductive layer, which can realize the heating function when powered on. However, the transparent conductive layer made of indium tin oxide has high brittleness and poor flexibility, and cannot be used in the fields of flexible sensing and touch control. Although the conductive polymer flexible heating device has good flexibility, its optical transmittance is generally around 75% to 80%, which is difficult to meet the optical transmittance requirement of more than 85% for optical devices, and the resistance value is often greater than 200 ohms, and the conductivity is poor. In addition, the stability of conductive polymer materials at high temperatures is insufficient, and it is difficult to achieve the requirement of high temperature and high humidity stability greater than 500hrs under long-term power-on heating. Some other heating optical devices use nanocarbon materials as the conductive layer. Although they have high thermal stability, their optical transmittance is low, which also cannot meet the optical transmittance requirement of more than 85% for optical devices, and the price is relatively high.

[0003] In order to take into account flexibility, optical transmittance and conductivity at the same time, some heating optical devices in the prior art use nanosilver materials to make transparent conductive layers, which can meet the requirements of optical transmittance greater than 88%, and resistance value less than 50 ohms, and are resistant to bending and have good flexibility. However, these existing heating optical devices have poor stability when powered on and heated, and it is still difficult to meet the requirements of high temperature and high humidity stability for more than 500 hrs under long-term heating conditions. Therefore, a heating optical device that can take into account flexibility, optical transmittance, conductivity and high temperature and high humidity stability at the same time is needed. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a transparent flexible heating optical device that can simultaneously take into account flexibility, optical transmittance, electrical conductivity, and high temperature and high humidity stability.

[0005] To solve the above problems, the technical solution adopted by the utility model is as follows: a transparent flexible heating optical device, comprising a transparent base layer, a nanosilver transparent conductive film layer, an electrode layer, a coating layer and a protective layer which are sequentially bonded and connected, and the electrode layer can be electrically connected to an external power source to electrically heat the nanosilver transparent conductive film layer.

[0006] Compared with the prior art, the beneficial effect of the utility model is that the heating optical device is provided with a nanosilver transparent conductive film layer. While realizing conductive heating, the optical transmittance of the heating optical device reaches more than 88%, and the resistance is less than 50 ohms, and it has good flexibility, and can be applied to the fields of flexible sensing and touch control. In addition, the heating optical device is provided with a coating layer and a protective layer. The coating layer can prevent the nanosilver material in the nanosilver transparent conductive film layer from being decomposed or oxidized under continuous heating, and can improve the thermal stability of the nanosilver transparent conductive film layer. The protective layer can protect the entire heating optical device, prevent oxygen, chlorine and sulfide in the air from corroding the nanosilver transparent conductive film layer and the electrode layer, and can also ensure that water vapor will not corrode the entire flexible transparent heating optical device. Therefore, the coating layer and protective layer provided in the heating optical device can provide dual protection for the nanosilver transparent conductive film layer and the electrode layer, improve the high temperature and high humidity thermal stability of the heating optical device, so that the heating optical device meets the requirement of high temperature and high humidity stability greater than 500hrs under long-term power-on heating. Therefore, the heating optical device has the advantages of good flexibility, high optical transmittance, good electrical conductivity and good high temperature and high humidity stability under long-term power-on, and can take into account flexibility, optical transmittance, electrical conductivity and high temperature and high humidity stability at the same time.

[0007] The transparent flexible heating optical device mentioned above has a coating liquid in the coating layer, and the coating liquid is composed of one or more of 1-phenyl-5-mercaptotetrazole, 3-mercapto-1,2,4-triazole, 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole, octadecanethiol, 1-heptadecanethiol, and hexadecanethiol.

[0008] In the above transparent flexible heating optical device, the protective layer is made of resin material.

[0009] In the above transparent flexible heating optical device, the thickness of the transparent substrate layer is 0.01 mm to 5.00 mm.

[0010] In the above-mentioned transparent flexible heating optical device, the transparent substrate layer is made of PET, PMMA, glass, PDMS, silicone rubber, TPU, PI, CPI, PC, PE or PP material.

[0011] In the above transparent flexible heating optical device, the nanosilver transparent conductive film layer is made of nanosilver wires.

[0012] In the above-mentioned transparent flexible heating optical device, the diameter of the nano silver wire is 10nm to 200nm, and the length is 1μm to 500μm.

[0013] In the above transparent flexible heating optical device, the electrode layer is made of silver paste, carbon paste or copper paste.

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the layered structure of the transparent flexible heating optical device according to an embodiment of the utility model.

[0016] Description of the accompanying drawings: 1-transparent substrate layer, 2-nanosilver transparent conductive film layer, 3-electrode layer, 4-coating layer, 5-protective layer. DETAILED DESCRIPTION

[0017] The embodiments of the present invention are described in detail below. Figure 1 An embodiment of the utility model provides a transparent flexible heating optical device, comprising a transparent substrate layer 1, a nanosilver transparent conductive film layer 2, an electrode layer 3, a coating layer 4 and a protective layer 5 which are sequentially bonded and connected, and the electrode layer 3 can be electrically connected to an external power source to electrically heat the nanosilver transparent conductive film layer 2.

[0018] The heating optical device is provided with a nanosilver transparent conductive film layer 2, which is made of nanosilver material. While achieving conductive heating, the optical transmittance of the heating optical device reaches more than 88%, and the resistance is less than 50 ohms, and it has good flexibility, and can be applied to the fields of flexible sensing and touch control. In addition, the heating optical device is provided with a coating layer 4 and a protective layer 5. The coating layer 4 can prevent the nanosilver material in the nanosilver transparent conductive film layer 2 from decomposing or oxidizing under continuous heating, and can improve the thermal stability of the nanosilver transparent conductive film layer 2. The protective layer 5 can protect the entire heating optical device, prevent oxygen, chlorine and sulfide in the air from corroding the nanosilver transparent conductive film layer 2 and the electrode layer 3, and can also ensure that water vapor will not corrode the entire flexible transparent heating optical device. Therefore, the coating layer 4 and the protective layer 5 provided in the heating optical device can provide dual protection for the nanosilver transparent conductive film layer 2 and the electrode layer 3, improve the thermal stability of the heating optical device, and make the heating optical device meet the requirements of high temperature and high humidity stability greater than 500hrs under long-term power-on heating. Therefore, the heating optical device has the advantages of good flexibility, high optical transmittance, good electrical conductivity and good high temperature and high humidity stability under long-term power-on, and can take into account flexibility, optical transmittance, electrical conductivity and high temperature and high humidity stability at the same time.

[0019] Furthermore, the transparent substrate layer 1 can be made of PET, PMMA, glass, PDMS, silicone rubber, TPU, PI, CPI, PC, PE or PP, etc., with a thickness of 0.01mm to 5.00mm. The nanosilver transparent conductive film layer 2 is made of nanosilver wires, which can have the advantages of good flexibility, low resistance and high optical transmittance of nanosilver materials. In addition, the double-layer protection of the coating layer 4 and the protective layer 5 effectively makes up for the shortcoming of the high temperature and high humidity stability of less than 500hrs in the heating optical device designed with only the nanosilver layer in the prior art. Furthermore, the diameter of the nanosilver wire is 10nm to 200nm, the length is 1μm to 500μm, and the electrode layer 3 is made of silver paste, carbon paste or copper paste.

[0020] Furthermore, the coating layer 4 contains a coating liquid, which is composed of one or more of 1-phenyl-5-mercaptotetrazole, 3-mercapto-1,2,4-triazole, 4-amino-3-hydrazine-5-mercapto-1,2,4-triazole, octadecanethiol, 1-heptadecanethiol, and hexadecanethiol, which can prevent the nanosilver material in the nanosilver transparent conductive film layer 2 from decomposing or oxidizing under continuous heating, thereby improving the thermal stability of the nanosilver transparent conductive film layer 2. The protective layer 5 is made of resin material, including but not limited to epoxy resin, acrylic resin, polyurethane resin, fluorocarbon resin, silicone resin or polyvinyl chloride resin, etc. The protective layer 5 can protect the entire heating optical device, prevent oxygen, chlorine and sulfide in the air from corroding the nanosilver transparent conductive film layer 2 and the electrode layer 3, and can also ensure that water vapor will not corrode the entire flexible transparent heating optical device.

[0021] Further, referring to Table 1 below, the high temperature and high humidity stability performance of four transparent flexible heating optical devices with different layered structures during the experiment is recorded in the following table, where:

[0022] The structure of device a includes a transparent substrate layer 1, a nanosilver transparent conductive film layer 2, and an electrode layer 3 which are sequentially bonded and connected, but without a coating layer 4 and a protective layer 5;

[0023] The structure of device b includes a transparent substrate layer 1, a nanosilver transparent conductive film layer 2, an electrode layer 3 and a coating layer 4 which are sequentially bonded and connected, but without a protective layer 5;

[0024] The structure of device c includes a transparent substrate layer 1, a nanosilver transparent conductive film layer 2, an electrode layer 3 and a protective layer 5 which are sequentially bonded and connected, but does not have a coating layer 4;

[0025] The structure of device d includes a transparent substrate layer 1, a nanosilver transparent conductive film layer 2, an electrode layer 3, a coating layer 4 and a protective layer 5 which are sequentially bonded and connected, that is, the transparent flexible heating optical device claimed by the present invention.

[0026] Among them, "√" in Table 1 indicates that the device has this layer structure, and "╳" indicates that the device does not have this layer structure.

[0027]

[0028] Table 1

[0029] From the analysis of the above table, it can be seen that for device a, device b and device c, that is, some transparent flexible heating optical devices in the prior art that use nanosilver materials to make transparent conductive layers, their high temperature and high pressure stability time can not reach 500 hrs, while device d, that is, the transparent flexible heating optical device claimed to be protected by the present utility model, has a high temperature and high pressure stability time of 502 hrs, which meets the requirement of high temperature and high humidity stability greater than 500 hrs.

[0030] It should be noted that in the description of the present invention, if there are any orientation descriptions, such as up, down, front, back, left, right, etc., the orientations or positional relationships indicated are all based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and cannot be understood as a limitation on the present invention.

[0031] In the description of the present utility model, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A transparent flexible heating optical device, characterized in that: The invention comprises a transparent substrate layer (1), a nanosilver transparent conductive film layer (2), an electrode layer (3), a coating layer (4) and a protective layer (5) which are sequentially bonded and connected, wherein the electrode layer (3) can be electrically connected to an external power source to electrically heat the nanosilver transparent conductive film layer (2).

2. The transparent flexible heating optical device according to claim 1, characterized in that: The protective layer (5) is made of resin material.

3. The transparent flexible heating optical device according to claim 1, characterized in that: The thickness of the transparent base layer (1) is 0.01 mm to 5.00 mm.

4. The transparent flexible heating optical device according to claim 1, characterized in that: The transparent base layer (1) is made of PET, PMMA, glass, PDMS, silicone rubber, TPU, PI, CPI, PC, PE or PP material.

5. The transparent flexible heating optical device according to claim 1, characterized in that: The nano silver transparent conductive film layer (2) is made of nano silver wires.

6. The transparent flexible heating optical device according to claim 5, characterized in that: The diameter of the nano silver wire is 10nm-200nm, and the length is 1μm-500μm.

7. The transparent flexible heating optical device according to claim 1, characterized in that: The electrode layer (3) is made of silver paste, carbon paste or copper paste.

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