Leather-based triboelectricity self-energized sensor with thermal management function and preparation method thereof

Abstract

The invention discloses a preparation method of a leather-based triboelectric self-energized sensor with a thermal management function, which comprises the following steps: step 1, dissolving FPOSS in deionized water to obtain an FPOSS solution, adding leather into the FPOSS solution, shaking to obtain a mixed solution, adding a sodium bicarbonate solution into the mixed solution every set time after shaking is finished until the pH value is 3.0-4.0, heating to 40 DEG C, reacting for 30-40 minutes, filtering, washing, and drying to obtain a leather-based triboelectric self-energized sensor; the FPOSS modified leather is obtained; and 2, constructing the leather-based triboelectric self-energized sensor with a thermal management function by taking the FPOSS modified leather as a friction negative electricity layer, taking a nylon 66 film as a friction positive electricity layer and taking copper as an electrode layer. The problems that an existing friction self-powered flexible sensor is uncomfortable to wear and even faces the risk of skin burn, and the environment is harmed when the friction self-powered flexible sensor is buried or incinerated as electronic waste are solved.

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 a thermal management function, and also relates to a preparation method of a leather-based triboelectric self-powered sensor with a 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, triboelectric nanogenerator (TENG) has broad application prospects in the fields of self-powered sensing, micro-nano power sources, blue energy, etc. At present, the base materials of friction self-powered flexible sensors are mostly synthetic polymers with excellent flexibility and ductility. However, when the flexible circuit is working, it will generate and accumulate Joule heat, which makes the human body uncomfortable to wear and even faces the risk of skin burns. In addition, it will cause harm to the environment when it is 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 function. Summary of the invention

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

[0004] In order to achieve the above-mentioned purpose, 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: 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 min-40 min 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.

[0005] As a preferred technical solution of the present invention, in step 1, the mixture is shaken at 25° C. and 10.5 r / min.

[0006] As a preferred technical solution of the present invention, in step 1, the shaking time is 2 h-4 h.

[0007] As a preferred technical solution of the present invention, in step 1, the time is set to 15 minutes.

[0008] The second purpose of the present invention is to provide a leather-based friction electric self-powered sensor with thermal management function to solve the problem that existing friction self-powered flexible sensors will cause discomfort to the human body when worn and even face the risk of skin burns, and will cause harm to the environment when buried or incinerated as electronic waste.

[0009] 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 by the preparation method thereof.

[0010] 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 flexibility, hygiene and good mechanical properties, introduces FPOSS into leather through leather wet processing technology, enhances the electron absorption ability of leather, improves its triboelectric sensing performance, and uses the high infrared emissivity of the abundant Si-O-Si bonds in FPOSS in the long-wave infrared region (8-13 μm) to give the leather radiation cooling performance, prepare FPOSS-modified leather with high mid-infrared emissivity, use it as a triboelectric negative layer, and nylon 66 film as a triboelectric positive layer to construct a leather-based triboelectric self-powered sensor with both high output and radiation cooling performance. The sensor has extremely high sensitivity (7.17V / kPa) and can achieve 8°C daytime radiation cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] 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: Figure 1 This is a sensitivity diagram of the leather-based triboelectric self-powered sensor prepared by the present invention; Figure 2 This is an outdoor temperature diagram of the leather-based triboelectric self-powered sensor prepared by the present invention. DETAILED DESCRIPTION

[0012] Embodiments of the present invention are described in detail below, examples of which 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0013] In the description of the present invention, unless otherwise clearly defined, words and phrases should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above words and phrases in the present invention in combination with the specific content of the technical solution.

[0014] Leather is a polymer material with a natural hierarchical pore structure. It has the advantages of being renewable, comfortable to wear and biodegradable, which is very consistent with the requirements of flexible smart wearable substrate materials. In the past decade, although many leather-based multifunctional wearable electronic products have been reported, leather-based wearable materials with both self-powered sensing and radiation cooling functions are still rare. Fluorinated cage silsesquioxane (FPOSS) is a class of organic-inorganic hybrid materials with a highly symmetrical nanoscale cubic cage skeleton. Its core inorganic framework is composed of Si-O-Si with high infrared emissivity in the long-wave infrared region (8-13 μm), and the periphery contains abundant electron-withdrawing groups -F.

[0015] The present invention proposes to use leather with advantages such as good flexibility, biocompatibility and biodegradability as a sensing material, select FPOSS to modify leather collagen fibers, and utilize the -F group on FPOSS to enhance the electron-absorbing ability of the leather and improve its triboelectric sensing performance; utilize the high infrared emissivity of the abundant Si-O-Si bonds in FPOSS in the long-wave infrared region (8-13 μm) to give the leather radiation cooling performance, thereby obtaining a leather-based triboelectric self-powered sensor with thermal management function.

[0016] 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: Step 1, dissolving FPOSS in deionized water to obtain a FPOSS solution, adding leather to the FPOSS solution, shaking at 25° C. and 10.5 r / min for 2 h to 4 h to obtain a mixed solution, adding sodium bicarbonate solution to the mixed solution every 15 min after the shaking until the pH reaches 3.0 to 4.0, then heating to 40° C. and reacting for 30 min to 40 min 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.

[0017] Sensitivity characterization of leather modified with FPOSS ( Figure 1 ) and outdoor radiation 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 performance, and prepare FPOSS-modified leather with high mid-infrared emissivity. It is used as the triboelectric negative layer and the nylon 66 film as the triboelectric 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 8°C daytime radiative cooling.

[0018] Example 1 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: Step 1, 4 mL of FPOSS and 10 g of leather were added to 20 mL of deionized water, 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 using a sodium bicarbonate solution every 15 min, and then the mixture was heated to 40°C for reaction for 30 min 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.

[0019] Example 2 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: Step 1, 5 mL of FPOSS and 10 g of leather were added to 20 mL of deionized water, 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; 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.

[0020] Example 3 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: 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 mixed solution was slowly adjusted to 3.5 with sodium bicarbonate solution every 15 min, and then the mixture was heated to 40°C for reaction for 35 min 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.

[0021] Example 4 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: 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 mixed solution 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; 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.

[0022] Example 5 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: 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 mixed solution was slowly adjusted to 3.5 with sodium bicarbonate solution every 15 min, and then the mixture was heated to 40°C for reaction for 33 min 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.

[0023] Example 6 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: Step 1, 9 mL of FPOSS and 10 g of leather were added to 20 mL of deionized water, 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 using a sodium bicarbonate solution every 15 min, and then the mixture was heated to 40°C for reaction for 30 min 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.

[0024] The above description shows and describes several preferred embodiments of the invention, but as mentioned above, it should be understood that the invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and modifications made by those skilled in the art should be within the scope of protection of the claims attached to the invention without departing from the spirit and scope of the invention.

Claims

1. A method for preparing a leather-based triboelectric self-powered sensor with thermal management function, characterized in that: Follow the steps below to implement it: 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 min-40 min 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 is shaken at 25° C. and 10.5 r / min.

3. The method for preparing the 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. A leather-based triboelectric self-powered sensor with thermal management function, characterized in that: It is prepared using the method for preparing a leather-based triboelectric self-powered sensor with thermal management function according to any one of claims 1 to 4.

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