Piezoelectric-triboelectric hybrid self-driven electronic skin and preparation method thereof

Abstract

The invention provides piezoelectric-triboelectric hybrid type self-driven electronic skin. The skin characterized in that the skin comprises a triboelectric sensing part and a piezoelectric sensing part arranged at the lower side of the triboelectric sensing part; the triboelectric sensing part comprises a flexible transparent porous electronegative film and a first flexible conductive fabric electrode arranged at the lower side of the flexible transparent porous electronegative film; the piezoelectric sensing part comprises a piezoelectric nanofiber film, a second flexible conductive fabricelectrode and a third flexible conductive fabric electrode, wherein the second flexible conductive fabric electrode and the third flexible conductive fabric electrode are arranged at the upper side and lower side of the piezoelectric nanofiber film respectively; the piezoelectric nanofiber film is obtained through an electrostatic spinning technology; and the flexible transparent porous electronegative film is of a porous structure prepared by taking a lotus leaf as a template. The multifunctional flexible self-driven electronic skin of the invention does not need to be driven by an external additional power source, and can ensure the accuracy of sensing and the wearing comfort of a human body.

Description

Technical field [0001] The invention belongs to the technical field of novel flexible sensors, and specifically relates to a piezoelectric-triboelectric hybrid self-driving electronic skin and a preparation method thereof. Background technique [0002] Biological skin is mainly responsible for the functions of defense and protection, perspiration and breathing, and perception of heat and cold and pressure. Electronic skin is a type of wearable bionic tactile sensor that can imitate the functions of human skin protection, perception, and adjustment. As a new type of artificial flexible electronic device, in addition to the basic functions of biological skin, electronic skin can also achieve special functions that human skin tissue does not have by creating or recreating an inductive response system. Electronic skin is related to the intelligent and multi-functionalization of carriers such as flexible robots, medical equipment, and human prostheses. It is a multidisciplinary and r...

AI Technical Summary

Problems solved by technology

Most electronic skins do not have the functions of object property and shape sensing, and physiological signal pulse sensing at the same time.

Moreover, most of its preparation processes involve micro-nano processing methods such as plasma treatment, physical vapor deposition, chemical vapor deposition, and magnetron sputtering. In addition to complex processes, high costs, long processes, and the need for external power supplies, these methods require hard and heavy power supplies. Not only affects the wearing comfort of the human body, but also cannot maintain a close and seamless fit with the human body, which greatly affects the fidelity of the sensing signal

In addition, frequent battery replacement or recharging is inconvenient, especially in emergencies

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