CN-122026745-A - Silk-screen printing textile-based wet electricity generating device, and preparation method and application thereof

CN122026745ACN 122026745 ACN122026745 ACN 122026745ACN-122026745-A

Abstract

The invention belongs to the technical field of flexible wearable electronic autonomous power supply, and particularly discloses a screen printing textile-based wet power generation device, a preparation method and application thereof, wherein the device comprises a textile fabric substrate, a carbon-based conductive layer, a composite hydrogel layer and an electrode, the carbon-based conductive layer and the composite hydrogel layer are respectively positioned on the front side and the back side of the textile fabric substrate to form a three-layer gradient functional structure in the cross-thickness direction, and the electrode is connected with the carbon-based conductive layer to form a complete conductive loop. The screen printing textile-based wet power generation device and the preparation method and application thereof are adopted, and the wet power generation self-power supply device which is reasonable in structural design, excellent in wearing experience, high in energy conversion efficiency, low in cost and easy to produce in quantity is provided, continuous power generation by utilizing the natural humidity gradient between human skin and environment is realized, a long-acting independent power supply solution is provided for flexible wearable electronic equipment, and the limitation of traditional energy supply is broken through.

Inventors

WEI SHIDA
ZHANG JUAN
HUANG HUIDI
MA HUI
SHEN JIAJIA
WANG YUANFENG
YU XIAOHUI

Assignees

嘉兴大学

Dates

Publication Date: 20260512
Application Date: 20260413

Claims (6)

1. The screen printing textile-based wet electricity generating device is characterized by comprising a textile fabric substrate, a carbon-based conductive layer, a composite hydrogel layer and electrodes, wherein the carbon-based conductive layer and the composite hydrogel layer are respectively positioned on the front side and the back side of the textile fabric substrate to form a three-layer gradient functional structure in the thickness direction, and the electrodes are connected with the carbon-based conductive layer to form a complete conductive loop; The textile fabric substrate is polyester fabric and has a natural porous structure, and the water vapor transmittance is 5000-10000 g/(m 2 .24 h); The composite hydrogel layer is prepared by compounding polyvinyl alcohol, lithium chloride and poly-4-styrenesulfonic acid, and realizes water vapor adsorption and ion transmission by constructing a hydrophilic-conductive synergistic system.
2. The screen printing textile-based wet power generation device according to claim 1, wherein the mass percentage of the lithium chloride is 0.6% -9%.
3. The screen printing textile-based wet power generation device according to claim 1, wherein the output current of the wet power generation device reaches 8-45 mu A and the output voltage reaches 0.38-0.45V in an environment with the relative humidity of more than 20%.
4. A method for manufacturing a screen printing textile-based wet power generation apparatus according to any one of claims 1 to 3, comprising the steps of: Step 1, dissolving polyvinyl alcohol in deionized water, heating and stirring until the polyvinyl alcohol is completely melted, adding a lithium chloride solution, uniformly mixing drop by drop, and then compounding with a poly 4-styrenesulfonic acid solution to prepare a compound hydrogel solution; step 2, printing carbon black sizing agent on the front surface of a textile fabric substrate through screen printing to form a carbon-based conductive layer; Step 3, printing the composite hydrogel solution on the back surface of the textile fabric substrate and corresponding to the carbon-based conductive layer; step 4, drying and solidifying to obtain a wet power generation unit; and 5, integrating a plurality of wet power generation units according to a serial-parallel structure through screen printing to form a large-area energy supply device.
5. The method for preparing the screen printing textile-based wet power generation device according to claim 4, wherein in the step 1, in the preparation process of the composite hydrogel solution, the lithium chloride solution is added dropwise into the polyvinyl alcohol solution, each drop is uniformly mixed and then added next, and when the polyvinyl alcohol-lithium chloride mixed solution is compounded with the poly 4-styrenesulfonic acid solution, the stirring is kept while the drops are simultaneously carried out, so that the uniform diffusion of the solution is ensured.
6. The application of the screen printing textile-based wet power generation device according to any one of claims 1 to 3, which is characterized in that the device is applied to autonomous power supply of flexible wearable electronic equipment, and continuous power supply is realized by capturing humidity gradient energy of human microenvironment.

Description

Silk-screen printing textile-based wet electricity generating device, and preparation method and application thereof Technical Field The invention relates to the technical field of flexible wearable electronic autonomous power supply, in particular to a screen printing textile-based wet power generation device, a preparation method and application thereof. Background Along with the deep penetration of flexible wearable electronic equipment to the field of normalized health monitoring and intelligent man-machine interaction, higher requirements are provided for a continuous and stable miniature energy supply system. The traditional energy supply scheme has the defects that chemical batteries are required to be replaced frequently and have biocompatibility hidden trouble, the technologies such as electromagnetic induction and piezoelectric effect depend on external environmental stimulation or mechanical vibration, adaptability is poor, the existing wet electricity generation technology does not need additional energy input, but homogeneous material devices have the problems of uneven distribution of functional groups, disordered ion transmission channels and the like, so that output voltage is low, response is delayed and current fluctuation is large, the electrical performance of heterogeneous composite structure wet electricity generation devices is better, but the preparation method relies on precise technologies such as vapor deposition and photoetching, cost is high, production rate is low, large-scale application is difficult, meanwhile, the substrate moisture permeability of the existing devices is low, long-time skin adhesion is easy to cause accumulation of wet heat, the size of the devices is limited by the preparation technology, and the large-area energy supply requirement cannot be met. In addition, current fabric-based wet-produced electrical devices are limited to planar layered heterostructures, and have the problems of limited energy capturing direction (longitudinal humidity difference is not effectively utilized, conversion efficiency is low) and insufficient dynamic stability (sweat is eliminated when in motion, humidity difference is eliminated, and output power is fast to decay), and these technical bottlenecks severely restrict the long-term stable operation and industrialization process of flexible wearable electronic devices. Disclosure of Invention The invention aims to provide a screen printing textile-based wet electricity generation device, a preparation method and application thereof, wherein the device has excellent flexible adaptability, biocompatibility and continuous energy supply capacity, and is suitable for various scenes needing long-term autonomous power supply, such as health monitoring equipment, intelligent man-machine interaction terminals, flexible wearable electronics and the like. Reasonable structural design, excellent wearing experience, high energy conversion efficiency, low cost and easy mass production, realizes continuous power generation by utilizing the natural humidity gradient between the skin of the human body and the environment, the long-acting autonomous power supply solution is provided for the flexible wearable electronic equipment, and the limitation of traditional energy supply is broken through. In order to achieve the above purpose, the invention provides a screen printing textile-based wet electricity generating device, which comprises a textile fabric substrate, a screen printing carbon-based conductive layer, a composite hydrogel layer and electrodes, wherein the carbon-based conductive layer and the composite hydrogel layer are respectively positioned on the front side and the back side of the textile fabric substrate to form a three-layer gradient functional structure in the thickness direction, and the electrodes are connected with the carbon-based conductive layer and the composite hydrogel layer to form a complete conductive loop. Preferably, the textile fabric substrate is polyester fabric and has a natural porous structure, and the water vapor transmittance is 5000-10000 g/(m 2.24 h). Preferably, the composite hydrogel layer is prepared by compounding polyvinyl alcohol, lithium chloride and poly-4-styrenesulfonic acid, and water vapor adsorption and ion transmission are realized by constructing a hydrophilic-conductive synergistic system. Preferably, the lithium chloride concentration is 0.6% -9%. Preferably, the wet power generation device outputs 8-45 mu A of current and 0.38-0.45V of voltage in the environment with the relative humidity of more than 20 percent. The invention also provides a preparation method of the silk-screen printing textile-based wet electricity generating device, which comprises the steps of composite hydrogel preparation, carbon-based conductive layer printing, hydrogel layer printing and drying and curing, and specifically comprises the following steps: Step 1, dissolving polyvinyl alcohol in deionized wate