A preparation method of flexible temperature sensor based on composite thermosensitive hydrogel

A temperature-sensitive hydrogel and temperature sensor technology, applied in the field of sensors, can solve the problems of easy generation of temperature drift, increased integration difficulty and flexible circuit design difficulty, and achieve the effects of easy mass production, fast response and low cost

Active Publication Date: 2021-06-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, for sensor devices that are greatly affected by temperature, such as metal materials, temperature drift is prone to occur, and additional logic processing and program control are required to solve this phenomenon, which further increases the difficulty of integration and the design of flexible circuits.

Method used

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  • A preparation method of flexible temperature sensor based on composite thermosensitive hydrogel
  • A preparation method of flexible temperature sensor based on composite thermosensitive hydrogel

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A method for preparing a flexible temperature sensor based on a composite thermosensitive hydrogel, comprising the following steps:

[0041] (1) Prepare two parts of NIPAM monomer solution: the first part mixes 0.5g NIPAM and 0.0175g BIS, add 4.3mL deionized water, stir well until the solution is clear and transparent; the second part mixes 0.5g NIPAM and 0.0175g BIS , add 4.7mL deionized water, stir well until the solution is clear and transparent;

[0042] (2) Add 0.7 mL of MXene monolayer colloid solution with a concentration of 5 mg / mL dropwise to the first NIPAM monomer solution, and stir slowly until uniform, so that the MXene content in the monomer solution reaches 0.7 mg / mL ; Add 0.3 mL of MXene monolithic colloid solution dropwise to the second NIPAM monomer solution with a concentration of 5 mg / mL, and slowly stir until uniform, so that the MXene content in the monomer solution reaches 0.3 mg / mL;

[0043] (3) Drop in 10uL of 10% APS solution and 10uL of TEMED...

Embodiment 2

[0049] A method for preparing a flexible temperature sensor based on a composite thermosensitive hydrogel, comprising the following steps:

[0050] (1) Prepare two parts of NIPAM monomer solution: the first part mixes 0.6g NIPAM and 0.022g BIS, add 4.2mL deionized water, stir well until the solution is clear and transparent; the second part mixes 0.6g NIPAM and 0.022g BIS, Add 4.6mL deionized water, stir well until the solution is clear and transparent;

[0051] (2) Add 0.8 mL of MXene monolayer colloid solution with a concentration of 5 mg / mL dropwise to the first NIPAM monomer solution, and stir slowly until uniform, so that the MXene content in the monomer solution reaches 0.8 mg / mL ; Add 0.4mL concentration of MXene monolithic colloid solution of 5mg / mL dropwise to the second part of NIPAM monomer solution, and slowly stir until uniform, so that the MXene content in the monomer solution reaches 0.4mg / mL;

[0052] (3) Drop in 30uL of APS solution with a mass concentration ...

Embodiment 3

[0058] A method for preparing a flexible temperature sensor based on a composite thermosensitive hydrogel, comprising the following steps:

[0059] (1) Prepare two parts of NIPAM monomer solution: the first part mixes 0.65g NIPAM and 0.024g BIS, add 4.1mL deionized water, stir well until the solution is clear and transparent; the second part mixes 0.65g NIPAM and 0.024g BIS, Add 4.5mL deionized water, stir well until the solution is clear and transparent;

[0060] (2) Add 0.9 mL of MXene monolayer colloid solution with a concentration of 5 mg / mL dropwise to the first NIPAM monomer solution, and stir slowly until uniform, so that the MXene content in the monomer solution reaches 0.9 mg / mL ; Add 0.5 mL of MXene monolithic colloid solution dropwise to the second part of NIPAM monomer solution with a concentration of 5 mg / mL, and slowly stir until uniform, so that the MXene content in the monomer solution reaches 0.5 mg / mL;

[0061] (3) Drop in 20uL of APS solution with a mass co...

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Abstract

The invention discloses a flexible temperature sensor based on a composite temperature-sensitive hydrogel and a preparation method thereof. The sensor includes a thermally conductive layer, a conductive layer and an electrode, and the conductive layer is connected to the thermally conductive layer and the electrode respectively. / MXene composite material, the MXene concentration in the thermal conductive layer is higher than the MXene concentration in the conductive layer. The method comprises the following steps: adding recrystallized NIPAM and BIS to deionized water to form a monomer solution; adding MXene solution dropwise to make its content 0.3-1.2mg / mL; adding APS and TEMED solution, stirring evenly and ultrasonically Oscillation; in a low-temperature anaerobic environment, cross-linking reactions are carried out successively to form a thermally conductive layer containing high-concentration MXene and a conductive layer containing low-concentration MXene respectively; conductive metal wires are fixed at both ends of the conductive layer. By adjusting the concentration of the conductive filling material in the upper and lower layers of the composite gel, the invention can make rapid logical judgment response to 30-42°C, is suitable for human body monitoring, etc., has simple preparation process, low cost, and is easy to produce in batches.

Description

technical field [0001] The invention relates to the field of sensors, in particular to a flexible temperature sensor based on a composite temperature-sensitive hydrogel and a preparation method thereof. Background technique [0002] Wearable sensors are one of the important working elements in the fields of flexible electronic systems and artificial skin, which can realize personalized medical detection such as fine temperature detection and long-term monitoring. Temperature sensing is one of the main sensing devices, which can be divided into continuous temperature monitoring and logic output temperature sensing. Among them, the logic output temperature sensor will output the signal when it exceeds the set temperature range. [0003] According to the working principle of temperature sensors, there are mainly contact temperature sensors and non-contact temperature sensors. Among them, non-contact sensing is mainly based on the law of black body radiation, and is mainly use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/00G01K11/06G01K1/02
CPCG01K11/00G01K11/06G01K1/02
Inventor 吴俊李颖慧段升顺
Owner SOUTHEAST UNIV
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