Friction nano generator based on biomembrane materials and suitable for being used in high humidity environment and preparation method and application thereof

Abstract

The invention provides a friction nano generator based on biomembrane materials and suitable for being used in a high humidity environment and a preparation method and application thereof, and belongsto the technical field of friction nano generators. The friction nano generator uses high polymer of which surface is modified by oxygen group, fluorine group or nitrogen group as a friction layer. Under high humidity, the group on the surface of the friction layer can form hydrogen bonds with water molecules in the environment, so that the density of electron clouds around the group is equalized, and the energy of the friction layer is reduced, the water molecules are caused to participate in friction electrification. Since the water molecules are prone to losing the positive charge of electrons in the friction electrification process, and the friction layer is further a material which loses the positive charge of the electrons in the friction process, the water molecules and the friction layer have a superposition effect, so that the positive electricity of the friction layer-water molecules is enhanced, the output is increased, anti-humidity effect is achieved, higher electric output can be kept in a high-humidity environment, and the friction nano generator based on the biomembrane materials is applied to the fields of environmental dissipation energy collection, humidity early warning or humidity sensing. The preparation method is simple and easy to operate.

Description

technical field [0001] The invention relates to the technical field of friction nanogenerators, in particular to a biofilm material-based friction nanogenerator suitable for use in a high-humidity environment, a preparation method and application thereof. Background technique [0002] In recent years, due to the large-scale development of conventional non-renewable energy sources such as coal, oil, and natural gas, an energy crisis has been caused worldwide, and the crisis of electric energy is particularly serious. In order to alleviate the energy crisis, the development of new energy is imminent. New energy refers to various energy forms other than traditional energy, including solar energy, geothermal energy, wind energy, ocean energy, biomass energy, nuclear fusion energy and so on. With the limitation of conventional energy sources and the increasingly prominent environmental problems, new energy sources featuring environmental protection and renewable characteristics ...

AI Technical Summary

Problems solved by technology

[0004] However, the application of triboelectric nanogenerators is limited due to the fact that the output of triboelectric nanogenerators is easily affected by the environmental humidity.

According to the experimental data, after the experimental environment humidity increased from 10% RH to 90% RH, the output current and output voltage of the solid-solid friction nanogenerator of conventional polymer materials decreased by 5 to 7 times, and the reduction of output seriously affected the Applications of Solid-Solid Frictional Nanogenerators

For example, the frictional nanogenerator used to collect the frictional energy of the human arm swing when running can hardly be used when the human body sweats a lot, because the sweat adheres to the friction layer of the frictional nanogenerator and reduces the output; The windmill friction nanogenerator used to collect wind energy cannot be used in heavy fog or rainy days, unless it is packaged, because the ambient humidity is too high and the output is too low; in the rainy season in the south, the ambient humidity generally increases, and the solid-solid friction Nanogenerators cannot be used; the sensors of solid-solid friction nanogenerators used in factories to detect gas, temperature, humidity, etc. are less sensitive under high humidity, so the humidity must be strictly controlled in the factory workshop, which increases production costs

[0005] In the prior art, frictional nanogenerators are packaged to reduce the influence of environmental humidity, but this method has the following disadvantages: the process is cumbersome, and the container for packaging must be transparent, water-blocking, high-strength materials, such as plexiglass , hard plastic, etc.; for some special applications, it is difficult to achieve, for example, some sensor devices require that the volume of the triboelectric generator must be small, and after packaging, the volume of the entire triboelectric nanogenerator will inevitably become larger, and it is difficult to meet the requirements; packaging After that, the detection sensitivity decreases. Due to the existence of frictional heat generation and other reasons, the heat generated will affect the output of the friction nanogenerator, resulting in a decrease in detection sensitivity.

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