Harmonic method based hydrogel thermal conductivity testing device and method

A testing device and hydrogel technology are applied in the field of harmonic method hydrogel thermal conductivity testing devices, which can solve the problems of high cost, difficult metal wires, complicated manufacturing process, etc., so as to eliminate the influence of contact resistance and improve the The effect of test accuracy and simple structure

Inactive Publication Date: 2018-01-23
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, the existing harmonic method is not suitable for measuring flexible materials with high water content such as hydrogels, mainly because it is difficult to plate metal wires on the surface of such materials

Method used

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  • Harmonic method based hydrogel thermal conductivity testing device and method
  • Harmonic method based hydrogel thermal conductivity testing device and method
  • Harmonic method based hydrogel thermal conductivity testing device and method

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0028] refer to figure 1 , figure 2 , a harmonic method hydrogel thermal conductivity testing device, including a detector, a precision resistance box, a signal generator, a voltage follower and a lock-in amplifier, wherein,

[0029] The detector includes a container 3, a support plate 2, an electrode 1 and a metal heating wire 4, the support plate 2 rests on the top of the container 3, the e...

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Abstract

The invention belongs to the technical field of material thermal conductivity measurement and discloses a harmonic method based hydrogel thermal conductivity testing device. The hydrogen thermal conductivity testing device comprises a detector, a precision resistance box, a signal generator, voltage followers and a phase-locking amplifier; the detector comprises a container, a support plate, an electrode and metal heating wires, the support plate is placed at the top of the container, the electrode is installed on the support plate and includes multiple copper bars, and lower ends of the copper bars are connected through the metal heating wires; the copper bar a is connected with the signal generator, both the copper bar b and the copper bar c are connected with the first voltage follower,the copper bar d is connected with the precision resistance box, the precision resistance box is connected with the second voltage follower and the signal generator, and the first voltage follower and the second voltage follower are connected with the phase-locking amplifier. By the arrangement, thermal conductivity of hydrogel can be measured through the harmonic method accurately and conveniently.

Description

technical field [0001] The invention belongs to the technical field of measuring thermal conductivity of materials, and more particularly relates to a device and method for testing the thermal conductivity of hydrogel by harmonic method. Background technique [0002] Hydrogels are macroscopic macromolecular materials composed of cross-linked polymer networks containing a large amount of water (70-99 wt%). The main component of our human body is a hydrogel. Hydrogels are considered to be the best materials for the fabrication of next-generation flexible / wearable electronic devices due to their flexibility, mechanical reliability, and biocompatibility. There are many inspiring examples in this regard, such as stretchable transparent touchscreens based on ionic hydrogels, steerable smart catheter tips based on flexible hydrogels, dual-network hydrogel optical fibers for strain sensors, etc. As we all know, the heat dissipation of electronic devices seriously affects their per...

Claims

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Application Information

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IPC IPC(8): G01N25/20
Inventor 杨诺臧剑锋郭汝磊唐妮
Owner HUAZHONG UNIV OF SCI & TECH
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