The invention relates to a friction nanometer power generator for converting mechanical energy to electric energy and a fabrication method of the friction nanometer power generator. The fabrication method comprises the steps of packaging a flexible substrate layer I, an electrode material layer I, an electrical negative friction layer, an electrical positive friction layer, an electrode material layer II and a flexible substrate layer II according to a sequence, and then connecting the two flexible substrate layer at the outmost layer so that the electrical negative friction layer and the electrical positive friction layer are arranged at intervals to fabricate the friction nanometer power generator, wherein the electrical negative friction layer is fabricated by automatically assembly a friction electrical negative substance on a surface of aerogel. The fabricated friction nanometer power generator for converting the mechanical energy to the electric energy comprises the electrical negative friction layer and the electrical positive friction layer, and the electrical negative frication layer mainly comprises nanometer fiber of the self-assembled friction electrical negative substance. The fabrication method is simple, the fabricated product is low in cost, the sensitivity on mechanical energy of tiny biology is high, the electrical output performance is excellent, and the frication nanometer power generator has favorable application prospect in the field of self power supply sensing and wearability.

Friction nanometer power generator for converting mechanical energy to electric energy and fabrication method of friction nanometer power generator

The invention provides a preparation method of a flexible pressure sensor for monitoring a motion signal and a human body pulse signal. The preparation method is characterized by comprising the following steps: preparing a frictional electricity positive polymer spinning solution and a frictional electricity negative polymer spinning solution, wherein the frictional electricity negative polymer spinning solution contains nanowire; respectively performing static spinning to obtain a frictional electricity positive fiber thin-film and a frictional electricity negative fiber thin-film; preparinga solution containing the polymer and the curing agent, and pouring the solution on the obtained preparation die, and curing the same to obtain a flexible support base material, wherein a groove is formed on an upper surface of the flexible support base material; respectively forming electrodes on the backs of the frictional electricity positive fiber thin-film and the frictional electricity negative fiber thin-film, and assembling to obtain the flexible pressure sensor for monitoring the motion signal and the human body pulse signal. The preparation method provided by the invention has extensive application prospect in the intelligent wearable field, the carry-on motion health and physiological signal monitoring and like fields.

Preparation of flexible pressure sensor for monitoring motion signal and human body pulse signal

The invention discloses a preparation method of a fabric-based portable flexible pressure sensor. The method is characterized by comprising the following steps: preparing triboelectric positive fasciated yarns and triboelectric negative fasciated yarns, and weaving the obtained triboelectric positive/negative fasciated yarns as weft yarns and nylon yarns or PTFE filaments as warp yarns to form a corresponding triboelectric positive fabric; and combining the triboelectric positive fabric with a triboelectric negative fabric to form the fabric-based portable flexible pressure sensor. By improving the effective contact area between an electropositive friction material and an electronegative friction material in unit area, the electric output performance of a friction nano-generator is improved, and the sensing performance of the flexible pressure sensor based on the friction nano-generator is improved; the sensor is used for monitoring carry-on motion signals at human joint parts and monitoring human pulse signals at carotid arteries to obtain corresponding signal results with reference values such that effective reference bases are provided for medical diagnosis and health assessment.

Preparation method of fabric-based portable flexible pressure sensor

The invention relates to a breathable knitted spacer fabric friction generator and a preparation method thereof. The method comprises the steps of weaving a top layer and a bottom layer by using a three-wire plating process, controlling the yarn angles of surface yarns, intermediate yarns and ground yarns respectively such that the three yarns are sequentially arranged according to a certain positional relationship and then are woven, at the same time, in the weaving process, performing alternate tucking of spacer wires between a top layer ground yarn and a bottom layer ground yarn with a certain number of spacing stitches to form the breathable knitted spacer fabric friction generator, wherein a top layer surface yarn and a bottom layer surface yarn are at the outmost sides of a compositelayer and are insulating yarns, a top layer intermediate yarn and a bottom layer intermediate yarn are conductive yarns, the top layer ground yarn and the bottom layer ground yarn are opposite and are a triboelectric negative yarn and a triboelectric positive yarn correspondingly, and a spacer layer is composed of a set of spacer wires that are simultaneously connected to the top layer ground yarn and bottom layer ground yarn. The preparation method of the invention has the advantages of simple process and high weaving efficiency, and the obtained knitted spacer fabric friction generator hasgood gas permeability and has excellent promotion value.

Breathable knitted spacer fabric friction generator and preparation method thereof

The invention discloses a friction nano-generator friction layer material as well as a preparation method and application thereof. The preparation method comprises the steps of carrying out laser etching on a friction layer A and a friction layer B so as to enable the roughness of the bottom surface of the friction layer A to reach 30-90% and enable the roughness of the top surface of the frictionlayer B to reach 30-90%; and carrying out plasma treatment respectively on the bottom surface of the friction layer A and the top surface of the friction layer B, wherein the plasma treatment time is1-120min, the plasma treatment voltage is 5-15KV, and the plasma treatment current is 0.5-0.6A. The invention provides a preparation method of the friction nano-generator friction layer material. Thepreparation method is low in cost and simple to operate. According to the preparation method, the selection range of an easily-obtained electronic polymer material and a volatile electronic polymer material is wide, the electron obtaining/losing performance of the obtained friction nano-generator friction layer material is high, then the electric output performance of the friction nano-generatoris improved by 50%-500%, and the application field is expanded.

Friction nano-generator friction layer material as well as preparation method and application thereof

The invention provides a fiber base multilayer structure friction nanometer power generator and a preparation method thereof. The fiber base multilayer structure friction nanometer power generator ischaracterized in that the power generator comprises an electropositive friction layer and a multilayer structure electronegative friction layer; the electropositive friction layer and the multilayer structure electronegative friction layer are static spinned nanofiber films; the multilayer structure electronegative friction layer comprises an electric storage layer, a conductive layer and a friction contact layer, wherein the electric storage layer, the conductive layer and the friction contact layer are successively arranged from bottom to top; and the electropositive friction layer and the electronegative friction layer can contact with each other or be separated from each other for generating electric charges. The prepared multilayer structure friction nanometer power generator has advantages of increasing shortcircuit current by 40-150%, boosting open-circuit voltage by 100-250%, and increasing electric quantity by 40-100%. The friction nanometer power generator according to the invention has advantages of high surface charge density, low volume mass, simple structure and short process flow. The fiber base multilayer structure friction nanometer power generator can efficientlycollect mechanical energy generation in human body movement and has wide application range in the field of microelectronics.

Fiber base multilayer structure friction nanometer power generator and preparation method thereof

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.

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

The invention provides a fiber-based shape adaptive passive electronic skin and a preparation method thereof. The fiber-based shape highly adaptive passive electronic skin, is characterized by comprising a flexible coaxial piezoelectric nanofiber membrane prepared by coaxial electrospinning, wherein the upper and lower sides of the flexible coaxial piezoelectric nanofiber membrane are both provided with flexible conductive fabric electrodes; and the flexible coaxial piezoelectric nanofiber membrane and the flexible conductive fabric electrodes are disposed in a transparent packaging material. The excellent flexibility of the electronic skin prepared by the method ensure that the electronic skin can be seamlessly fitted with a human body to provide the wearing comfort for the human body, has high sensitivity, can sensitively sense the motion of the human body, and has a wide application space in the field of human sport health wearable detection.

Fiber-based shape adaptive passive electronic skin and preparation method thereof

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