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An electrothermal driver with ultra-fast response speed and its preparation method

A response speed, driver technology, applied to the conductive layer on the insulating carrier, mechanical equipment, machines/engines, etc., can solve the problems of slow response speed, high driving voltage, and unsatisfactory electrothermal driving performance of electrothermal drivers. Achieve the effect of excellent response speed, fast response speed and large deformation

Active Publication Date: 2022-03-18
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these electrothermal drivers either have slow response speeds or high driving voltages, so the overall electrothermal drive performance still falls short of practical requirements.

Method used

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  • An electrothermal driver with ultra-fast response speed and its preparation method
  • An electrothermal driver with ultra-fast response speed and its preparation method
  • An electrothermal driver with ultra-fast response speed and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Fresh AgNO 3 (0.9 g) was added to 20 mL of ethylene glycol and mixed ultrasonically in an ice-water bath at 4-8°C for 5-6 minutes until completely dissolved. CuCl 2 2H 2 O (0.0132 g) was dissolved in 16 mL of ethylene glycol. PVP (K30, 0.421 g) and PVP (K90, 0.406 g) were dissolved in 115 mL of ethylene glycol and heated at 130 °C for 25 minutes to achieve complete dissolution, then heated to 140 °C in a 250 mL flask in an oil bath. Subsequently, within 5 minutes, 3.2 mL of CuCl 2 solution and 20mL AgNO 3 The solution was added dropwise to the PVP solution. The reaction was held for 50 minutes. After the reaction was completed, the flask was removed from the oil bath and the solution was quenched to room temperature, and the obtained product was crude silver nanowires.

Embodiment 2

[0030] Prepare (A) 220.0 mM NaBr, (B) 210.0 mM NaCl and (C) 505.0 mM PVP K90 in ethylene glycol. Ethylene glycol (116mL), solution A (1mL), solution B (2mL), solution C (15mL) and fresh AgNO 3 (0.6765 g in 15 mL ethylene glycol) was added to a 250 mL flask in an oil bath at room temperature. Then the solution was heated at 300rpm min -1 Stir mechanically for 30 min. After stirring, the temperature of the oil bath was slowly raised to 180°C over 20-25 minutes. At the same time, during the heating process, nitrogen (150mL min -1 ) into the solution. When the temperature reached 180°C, the nitrogen was turned off and the temperature of the oil bath was set to 170°C. After 10 minutes, stirring was stopped and the reaction was maintained for 1 hour. After the reaction was completed, the flask was removed from the oil bath and the solution was cooled to room temperature in water, and the obtained product was crude fine silver nanowires.

Embodiment 3

[0032] Both crude silver nanowires and crude silver nanowires were purified by dynamic stirring-induced centrifugal purification. The prepared silver nanowire crude product was mixed with deionized water, and then poured into a filter membrane cylindrical chamber with holes (8 μm), and the maximum speed of the mechanical stirrer was set at 900 rpm with a six-hole stirring paddle. Deionized water was continuously flowed into the filter unit to compensate for the removed filtrate solution and to maintain a stable silver nanowire concentration in the feed solution. After purification (60 minutes), the continuous addition of deionized water was stopped while stirring and rinsing continued to concentrate the solution to the desired concentration of silver nanowires. Purified silver nanowires were collected from the bottom of the filter-membrane-based cylindrical chamber.

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Abstract

An electrothermal driver with ultra-fast response speed. It consists of a polymer film and a silver nanowire / adhesive layer attached to the polymer film to form a double-layer structure. On the silver nanowire / adhesive layer at one end of the double-layer structure Coated with conductive electrodes for connecting wires, and one end coated with conductive electrodes is cut from the middle in the longitudinal direction to form a U shape; the present invention combines silver nanowires with excellent conductivity with polymer films with a large thermal expansion coefficient Combined, the double-layer electrothermal actuator is formed through the action of the binder. The present invention solves the problems of slow response and high driving voltage of the electrothermal actuator. The prepared hybrid silver nanowire electrothermal actuator has excellent response speed, and only needs to bend 360° 0.08s, the driving voltage only needs 1V.

Description

technical field [0001] The invention belongs to the field of electrothermal drive, and relates to an electrothermal drive with ultra-fast response speed and a preparation method thereof. Background technique [0002] Drivers are key control components in smart switches, smart robots, and smart equipment, and play a central role in the execution of internal instructions in smart systems. With the rapid development and popularization of intelligent robots and intelligent systems, the requirements for drives are getting higher and higher, and they need to have fast response speed, large deformation, and high energy conversion efficiency at the same time. The electrothermal actuator is a driving device that converts electrical energy into thermal energy and uses the difference in thermal expansion coefficient of the material to drive the deformation of the material. The electrothermal actuator is simple to prepare, has strong controllability, large deformation, and high energy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03G7/06H01B5/14H01B1/02
CPCF03G7/06H01B5/14H01B1/02
Inventor 彭永武陈良俊陈桂南杨中林
Owner ZHEJIANG UNIV OF TECH
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