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Preparation method and product of a shape-adaptive fast-response soft heater

A fast-response, heater technology, used in ohmic resistance heating, ohmic resistance heating parts, electric heating devices, etc., can solve the problems that the heater cannot heat three-dimensional curved objects with large deformation, and is difficult to apply, and achieves fast speed and response speed. Fast, excellent electrical conductivity

Active Publication Date: 2020-12-18
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these heaters are incapable of large deformation and heating of three-dimensional curved objects, making it difficult for practical applications

Method used

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  • Preparation method and product of a shape-adaptive fast-response soft heater
  • Preparation method and product of a shape-adaptive fast-response soft heater
  • Preparation method and product of a shape-adaptive fast-response soft heater

Examples

Experimental program
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Effect test

preparation example Construction

[0039] refer to figure 1 As shown in (a)-(i), the present invention provides a method for preparing a shape-adaptive fast-response soft heater, comprising the following steps:

[0040] (1) if figure 1 As shown in (a), the hard substrate 1 is cleaned with acetone, isopropanol and deionized water in sequence, and then dried with nitrogen. Preferably, the hard substrate 1 is a monocrystalline silicon wafer, polycrystalline silicon wafer, epitaxial wafer, quartz wafer or glass wafer, with a flat and smooth surface.

[0041] (2) if figure 1 As shown in (b), a sacrificial layer 2 cured by polyvinyl alcohol aqueous solution is prepared on the hard substrate 1 . Specifically, the polyvinyl alcohol aqueous solution is first configured, then the polyvinyl alcohol aqueous solution is spin-coated on the hard substrate 1, and then heated to solidify the polyvinyl alcohol aqueous solution on the hard substrate 1 to form a film, and the cured film forms the sacrificial layer 2 . More sp...

Embodiment 1

[0056] a. Hard substrate 1 selects a 4-inch monocrystalline silicon wafer, cleans its polished surface with acetone, isopropanol and deionized water in sequence and blows it dry with nitrogen, then spin-coats the 10% polyvinyl alcohol aqueous solution configured in the above-mentioned scheme two on top. Afterwards, the silicon wafer was heated on a hot plate at a temperature of 80° C. for 15 minutes, so that the water was heated to evaporate, and the polyvinyl alcohol was solidified to form a film, and the preparation of the sacrificial layer 2 was completed.

[0057] b. Put the hard substrate 1 on the stage of the manual screen printing machine, make the screen plate parallel to the hard substrate 2 and keep a distance of 5 mm. The stencil adopts such as figure 2 The pattern shown is U-shaped, and then the hard substrate 1 is heated to cure the conductive material 3 to form a patterned conductive layer 4 . The conductive layer 4 has a thickness of 35 microns.

[0058]c. S...

Embodiment 2

[0064] a. The selection of the hard substrate 1 and the preparation of the sacrificial layer 2 are the same as in Example 1.

[0065] b. Put the hard substrate 1 on the stage of the manual screen printing machine, make the screen plate parallel to the hard substrate 2 and maintain a distance of 8 mm. The stencil adopts such as image 3 The pattern shown, ie parallelogram, is then heated to hard substrate 1 to cure conductive material 3 to form patterned conductive layer 4 . The conductive layer 4 has a thickness of 25 microns.

[0066] c. Spin-coat polydimethylsiloxane on the sacrificial layer 2 as the flexible substrate 5 of the shape-adaptive fast-response soft heater, the spin-coating speed is 800 rpm, and the spin-coating time is 3 minutes, so that It covers the patterned conductive layer 4 and is then heated to cure it. The curing temperature is 80° C., and the curing time is 1 hour. Under this condition, the flexible substrate 5 has a thickness of 135 micrometers.

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Abstract

The invention belongs to the field of flexible electronics devices, and particularly discloses a preparation method and a product of a shape adaptive fast response soft heater. The method comprises the following steps: (1) spin-coating a polyvinyl alcohol aqueous solution on a hard substrate and heating to cure the hard substrate to form a sacrificial layer; (2) processing the conductive materialinto a conductive layer by screen printing; 3) spin-coating a flexible polymer on the sacrificial layer and heating to cure the flexible polymer; (4) dissolving the sacrificial layer to strip the hardsubstrate; and (6) sticking a copper foil and an insulating layer on the initial soft heater body. The product is prepared by the above method. The soft heater has fast response speed, small requireddriving voltage, large deformation and good shape adaptability and can realize reliable grasping and heating of complex shape objects. Meanwhile, the thermal stability of the soft heater at high temperature is good and the performance of the soft heater can be adjusted by simply controlling the DC voltage of the power supply.

Description

technical field [0001] The invention belongs to the field of flexible electronic devices, and more specifically relates to a preparation method and product of a shape-adaptive fast-response soft heater. Background technique [0002] Flexible actuators can convert external stimuli such as heat and light to achieve their own mechanical deformation, and have great application prospects in artificial muscles, bionic robots and other fields. Among various types of actuators, electric actuators are relatively simple in structure and easy to control. Among them, electroactive polymer actuators have been extensively studied due to their light weight, large deformation, flexibility, and low cost. But most electroactive polymer actuators require high driving voltage or electrolyte environment, so their applications in different fields are strictly limited. [0003] Unlike electroactive polymer actuators, electrothermal actuators based on the difference in thermal expansion of materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B3/34H05B3/02H05K3/12
CPCH05B3/02H05B3/34H05K3/1216H05K3/1283
Inventor 吴豪姜珊胡一佳
Owner HUAZHONG UNIV OF SCI & TECH
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