Leather-based triboelectric self-powered sensor with thermal management function and preparation method thereof

Abstract

The present invention discloses a method for preparing a leather-based triboelectric self-powered sensor with a thermal management function, comprising the following steps: step 1, dissolving FPOSS in deionized water to obtain a FPOSS solution, adding leather to the FPOSS solution and shaking to obtain a mixed solution, adding sodium bicarbonate solution to the mixed solution at set intervals until the pH reaches 3.0-4.0, then heating to 40°C and reacting for 30-40 minutes to obtain FPOSS-modified leather; step 2, using the FPOSS-modified leather as a tribo-negative layer, a nylon 66 film as a tribo-positive layer, and copper as an electrode layer to construct a leather-based triboelectric self-powered sensor with a thermal management function. The present invention solves the problems of existing triboelectric self-powered flexible sensors, which can cause discomfort to the human body when worn and even face the risk of skin burns, and can cause harm to the environment when buried or incinerated as electronic waste.

Description

Technical Field

[0001] The present invention belongs to the technical field of preparation of electric flexible sensors, and specifically relates to a leather-based triboelectric self-powered sensor with thermal management function, and also relates to a preparation method of a leather-based triboelectric self-powered sensor with thermal management function. Background Art

[0002] With the rapid development of flexible wearable devices and the intensification of the energy crisis, multifunctional self-powered flexible sensors have emerged. As a new type of sensor based on contact electrification and electrostatic induction, the triboelectric nanogenerator (TENG) has broad application prospects in the fields of self-powered sensing, micro-nano power sources, and blue energy. Currently, the base materials of triboelectric self-powered flexible sensors are mostly synthetic polymers with excellent flexibility and ductility. However, when flexible circuits are in operation, they generate and accumulate Joule heat, which makes them uncomfortable to wear and even poses the risk of skin burns. In addition, they are harmful to the environment when buried or incinerated as electronic waste. Therefore, it is of great significance to develop a self-powered wearable sensing material that is breathable, comfortable, environmentally friendly, and has thermal management functions. Summary of the Invention

[0003] The first purpose of the present invention is to provide a method for preparing a leather-based triboelectric self-powered sensor with thermal management function, so as to solve the problems that existing triboelectric self-powered flexible sensors may cause discomfort to the human body when worn and even face the risk of skin burns, and may cause harm to the environment when buried or incinerated as electronic waste.

[0004] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is: a method for preparing a leather-based triboelectric self-powered sensor with thermal management function, which is specifically implemented according to the following steps:

[0005] Step 1: dissolving FPOSS in deionized water to obtain a FPOSS solution, adding leather to the FPOSS solution and shaking to obtain a mixed solution, adding sodium bicarbonate solution to the mixed solution at set intervals until the pH reaches 3.0-4.0, then heating to 40°C and reacting for 30-40 minutes to obtain FPOSS-modified leather;

[0006] Step 2: Use FPOSS-modified leather as the triboelectric negative layer, nylon 66 film as the triboelectric positive layer, and copper as the electrode layer to construct a leather-based triboelectric self-powered sensor with thermal management function.

[0007] As a preferred technical solution of the present invention, in step 1, the mixture is shaken at 25° C. and 10.5 r / min.

[0008] As a preferred technical solution of the present invention, in step 1, the shaking time is 2 h-4 h.

[0009] As a preferred technical solution of the present invention, in step 1, the time is set to 15 minutes.

[0010] The second purpose of the present invention is to provide a leather-based triboelectric self-powered sensor with thermal management function to solve the problem that existing triboelectric self-powered flexible sensors may cause discomfort to the human body when worn and even face the risk of skin burns, and may cause harm to the environment when buried or incinerated as electronic waste.

[0011] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: the leather-based triboelectric self-powered sensor with thermal management function is prepared using the above-mentioned preparation method.

[0012] The beneficial effects of the present invention are as follows: the preparation method of the leather-based triboelectric self-powered sensor with thermal management function of the present invention, based on the advantages of leather's flexibility, hygiene and good mechanical properties, introduces FPOSS into leather through leather wet processing technology, thereby enhancing the leather's electron-absorbing ability and improving its triboelectric sensing performance. At the same time, the high infrared emissivity of the abundant Si-O-Si bonds in FPOSS in the long-wave infrared region (8-13 μm) is utilized to give the leather radiative cooling properties, and prepare FPOSS-modified leather with high mid-infrared emissivity. It is used as a tribo-negative layer and a nylon 66 film as a tribo-positive layer to construct a leather-based triboelectric self-powered sensor with both high output and radiative cooling performance. The sensor has extremely high sensitivity (7.17 V / kPa) and can achieve daytime radiative cooling of 8°C. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0014] Figure 1 This is a sensitivity diagram of the leather-based triboelectric self-powered sensor prepared by the present invention;

[0015] Figure 2 This is a diagram of the outdoor temperature of the leather-based triboelectric self-powered sensor prepared by the present invention. DETAILED DESCRIPTION

[0016] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0017] In the description of the present invention, unless otherwise clearly defined, terms and expressions should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms and expressions in the present invention in combination with the specific content of the technical solution.

[0018] Leather is a polymer material with a natural hierarchical pore structure. It offers advantages such as renewability, comfort, and biodegradability, making it ideally suited for the substrate materials required for flexible smart wearables. While numerous leather-based multifunctional wearable electronics have been reported over the past decade, reports of leather-based wearable materials with both self-powered sensing and radiative cooling capabilities remain limited. Fluorinated caged silsesquioxanes (FPOSS) are a class of organic-inorganic hybrid materials with a highly symmetrical nanoscale cubic cage skeleton. Their core inorganic framework is composed of Si-O-Si, exhibiting high infrared emissivity in the long-wave infrared region (8-13 μm), and the periphery contains abundant electron-withdrawing groups (-F).

[0019] The present invention proposes using leather, which has advantages such as good flexibility, biocompatibility, and biodegradability, as a sensing material. FPOSS is selected to modify leather collagen fibers, and the -F groups on FPOSS are utilized to enhance the electron-absorbing ability of the leather, thereby improving its triboelectric sensing performance. The high infrared emissivity of the abundant Si-O-Si bonds in FPOSS in the long-wave infrared region (8-13 μm) is utilized to impart radiative cooling properties to the leather, thereby obtaining a leather-based triboelectric self-powered sensor with thermal management function.

[0020] The method for preparing the leather-based triboelectric self-powered sensor with thermal management function of the present invention is specifically implemented according to the following steps:

[0021] Step 1: dissolving FPOSS in deionized water to obtain a FPOSS solution, adding leather to the FPOSS solution, and shaking at 25°C and 10.5 r / min for 2-4 hours to obtain a mixed solution. After the shaking, sodium bicarbonate solution is added to the mixed solution every 15 minutes until the pH reaches 3.0-4.0, and then the mixture is heated to 40°C and reacted for 30-40 minutes to obtain FPOSS-modified leather;

[0022] Step 2: Use FPOSS-modified leather as the triboelectric negative layer, nylon 66 film as the triboelectric positive layer, and copper as the electrode layer to construct a leather-based triboelectric self-powered sensor with thermal management function.

[0023] Sensitivity characterization of leather modified with FPOSS ( Figure 1 ) and outdoor radiant cooling performance ( Figure 2 ) Based on the advantages of leather's flexibility, hygiene and good mechanical properties, the present invention introduces FPOSS into leather through leather wet processing technology, thereby enhancing the leather's electron-absorbing ability and improving its triboelectric sensing performance. At the same time, the high infrared emissivity of the abundant Si-O-Si bonds in FPOSS in the long-wave infrared region (8-13 μm) is utilized to give the leather radiative cooling properties, and prepare FPOSS-modified leather with high mid-infrared emissivity. It is used as the tribo-negative layer and the nylon 66 film as the tribo-positive layer to construct a leather-based triboelectric self-powered sensor with both high output and radiative cooling performance. The sensor has extremely high sensitivity (7.17 V / kPa) and can achieve daytime radiative cooling of 8°C.

[0024] Example 1

[0025] The method for preparing the leather-based triboelectric self-powered sensor with thermal management function of the present invention is specifically implemented according to the following steps:

[0026] Step 1: 4 mL of FPOSS and 10 g of leather were added to 20 mL of deionized water, respectively, and the mixture was shaken at 25°C and 10.5 r / min for 2 h to obtain a mixed solution. After the shaking, the pH of the solution was slowly adjusted to 3.0 with sodium bicarbonate solution every 15 min, and then the mixture was heated to 40°C and reacted for 30 min to obtain FPOSS-modified leather;

[0027] Step 2: Use FPOSS-modified leather as the triboelectric negative layer, nylon 66 film as the triboelectric positive layer, and copper as the electrode layer to construct a leather-based triboelectric self-powered sensor with thermal management function.

[0028] Example 2

[0029] The method for preparing the leather-based triboelectric self-powered sensor with thermal management function of the present invention is specifically implemented according to the following steps:

[0030] Step 1: 5 mL of FPOSS and 10 g of leather were added to 20 mL of deionized water, respectively, and the mixture was shaken at 25°C and 10.5 r / min for 3 h to obtain a mixed solution. After the shaking, the pH of the mixed solution was slowly adjusted to 3.0 with sodium bicarbonate solution every 15 min, and then the mixture was heated to 40°C and reacted for 30 min to 40 min to obtain FPOSS-modified leather;

[0031] Step 2: Use FPOSS-modified leather as the triboelectric negative layer, nylon 66 film as the triboelectric positive layer, and copper as the electrode layer to construct a leather-based triboelectric self-powered sensor with thermal management function.

[0032] Example 3

[0033] The method for preparing the leather-based triboelectric self-powered sensor with thermal management function of the present invention is specifically implemented according to the following steps:

[0034] Step 1: 6 mL of FPOSS and 10 g of leather were added to 20 mL of deionized water, respectively, and shaken at 25°C and 10.5 r / min for 3 h. After the shaking, the pH of the mixture was slowly adjusted to 3.5 with sodium bicarbonate solution every 15 min, and then the mixture was heated to 40°C and reacted for 35 min to obtain FPOSS-modified leather;

[0035] Step 2: Use FPOSS-modified leather as the triboelectric negative layer, nylon 66 film as the triboelectric positive layer, and copper as the electrode layer to construct a leather-based triboelectric self-powered sensor with thermal management function.

[0036] Example 4

[0037] The method for preparing the leather-based triboelectric self-powered sensor with thermal management function of the present invention is specifically implemented according to the following steps:

[0038] Step 1: 7 mL of FPOSS and 10 g of leather were added to 20 mL of deionized water, respectively, and shaken at 25°C and 10.5 r / min for 4 h. After the shaking, the pH of the mixture was slowly adjusted to 3.5 with sodium bicarbonate solution every 15 min, and then the mixture was heated to 40°C and reacted for 40 min to obtain FPOSS-modified leather;

[0039] Step 2: Using the FPOSS modified leather as the triboelectric negative layer, the nylon 66 film as the triboelectric positive layer, and copper as the electrode layer, a leather-based triboelectric self-powered sensor with thermal management function is constructed.

[0040] Example 5

[0041] The method for preparing the leather-based triboelectric self-powered sensor with thermal management function of the present invention is specifically implemented according to the following steps:

[0042] Step 1: 8 mL of FPOSS and 10 g of leather were added to 20 mL of deionized water, respectively, and shaken at 25°C and 10.5 r / min for 4 h. After the shaking, the pH of the mixture was slowly adjusted to 3.5 with sodium bicarbonate solution every 15 min, and then the mixture was heated to 40°C and reacted for 33 min to obtain FPOSS-modified leather;

[0043] Step 2: Use FPOSS-modified leather as the triboelectric negative layer, nylon 66 film as the triboelectric positive layer, and copper as the electrode layer to construct a leather-based triboelectric self-powered sensor with thermal management function.

[0044] Example 6

[0045] The method for preparing the leather-based triboelectric self-powered sensor with thermal management function of the present invention is specifically implemented according to the following steps:

[0046] Step 1: 9 mL of FPOSS and 10 g of leather were added to 20 mL of deionized water, respectively, and the mixture was shaken at 25°C and 10.5 r / min for 2 h to obtain a mixed solution. After the shaking, the pH of the solution was slowly adjusted to 3.0 with sodium bicarbonate solution every 15 min, and then the mixture was heated to 40°C and reacted for 30 min to obtain FPOSS-modified leather;

[0047] Step 2: Use FPOSS-modified leather as the triboelectric negative layer, nylon 66 film as the triboelectric positive layer, and copper as the electrode layer to construct a leather-based triboelectric self-powered sensor with thermal management function.

[0048] The foregoing description shows and describes several preferred embodiments of the invention. However, as previously stated, it should be understood that the invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Rather, the invention is applicable to various other combinations, modifications, and environments and is capable of modification within the scope of the inventive concept described herein, through the teachings above, or through techniques or knowledge in the relevant art. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.

Claims

1. A method for preparing a leather-based triboelectric self-powered sensor with thermal management function, characterized in that: Please follow the steps below to implement: Step 1: dissolving FPOSS in deionized water to obtain a FPOSS solution, adding leather to the FPOSS solution and shaking to obtain a mixed solution, adding sodium bicarbonate solution to the mixed solution at set intervals until the pH reaches 3.0-4.0, then heating to 40°C and reacting for 30-40 minutes to obtain FPOSS-modified leather; Step 2: Use FPOSS-modified leather as the triboelectric negative layer, nylon 66 film as the triboelectric positive layer, and copper as the electrode layer to construct a leather-based triboelectric self-powered sensor with thermal management function.

2. The method for preparing a leather-based triboelectric self-powered sensor with thermal management function according to claim 1, characterized in that: In step 1, the mixture was shaken at 25° C. and 10.5 r / min.

3. The method for preparing a leather-based triboelectric self-powered sensor with thermal management function according to claim 1, characterized in that: In step 1, the shaking time is 2 h-4 h.

4. The method for preparing a leather-based triboelectric self-powered sensor with thermal management function according to claim 1, characterized in that: In step 1, the time is set to 15 minutes.

5. Leather-based triboelectric self-powered sensor with thermal management function, characterized in that: It is prepared using the preparation method of the leather-based triboelectric self-powered sensor with thermal management function according to any one of claims 1-4.

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