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Flexible self-driven sensor for sensing temperature and touch and preparation method thereof

A temperature-sensing, self-driving technology, applied to thermometers using directly heat-sensitive electric/magnetic elements, measurement of properties and forces using piezoelectric devices, thermometers, etc., can solve insufficient polarization and poor sensing capabilities , complex material size and shape, etc., to achieve the effects of improving sensing performance, preventing leakage, high flexibility and mechanical strength

Active Publication Date: 2022-03-08
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0003] At present, there are many materials used in the field of sensors, but they have the following problems: (1) The service life is short, mainly manifested in the high leakage current and serious fatigue problems after the accumulated polarization reversal, resulting in Poor sensing ability; (2) The mechanical strength of the device is low and cannot adapt to complex application environments; (3) Factors such as the size and shape of the material lead to inconvenient polarization or insufficient polarization, which ultimately affects the sensing performance of the device; (4) ) The volatilization of toxic substances such as lead is harmful to the human body

Method used

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  • Flexible self-driven sensor for sensing temperature and touch and preparation method thereof
  • Flexible self-driven sensor for sensing temperature and touch and preparation method thereof

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preparation example Construction

[0032] see figure 2 A method for preparing a flexible self-driven multifunctional sensor for sensing temperature and touch provided by an embodiment of the present invention includes the following steps:

[0033]Step 1) Configuration of composite fiber precursor solution: the selected PZT (lead zirconate titanate) is PZT-4, its piezoelectric voltage constant is 2.6Vm / N, and its particle diameter is between 200nm and 50μm. The selected MXenes were Ti 2 CT x 、Ti 3 C 2 T x , V 2 CT x and Nb 2 CT x One of them, different MXenes can regulate the difficulty of in situ polarization of the composite fiber. Before use, put MXene into deoxygenated water, at a temperature of 2-5°C, in a nitrogen-protected environment, sonicate for 1-10 hours, and then centrifuge and dry to obtain MXene nanosheets with a diameter of 20-200 nm. First, add a certain amount of PVDF (polyvinylidene fluoride) powder into the DMF (dimethylformamide) solution, and stir until it is completely dissolved...

Embodiment 1

[0041] (1) Configuration of the composite fiber precursor solution: the selected lead zirconate titanate (PZT) is PZT-4, its piezoelectric voltage constant is 2.6Vm / N, and its particle diameter is between 200nm and 50μm. The selected MXenes were Ti 2 CT x 、Ti 3 C 2 T x , V 2 CT x and Nb 2 CT x One of them, different MXenes can regulate the difficulty of in situ polarization of the composite fiber. Before use, MXene was placed in deoxygenated water, ultrasonicated for 1 h at a temperature of 5 °C in a nitrogen-protected environment, and then centrifuged and dried to obtain MXene nanosheets with a diameter of 20-200 nm. First, add a certain amount of PVDF powder into the DMF solution, and stir until it is completely dissolved to form a clear solution; then add a certain amount of PZT, and stir until a stable suspension is formed; thirdly, add a certain amount of MXene, and stir again until a suspension is formed. Turbid solution; finally, put the prepared suspension int...

Embodiment 2

[0048] (1) Configuration of the composite fiber precursor solution: the selected lead zirconate titanate (PZT) is PZT-4, its piezoelectric voltage constant is 2.6Vm / N, and its particle diameter is between 200nm and 50μm. The selected MXenes were Ti2 CT x 、Ti 3 C 2 T x , V 2 CT x and Nb 2 CT x One of them, different MXenes can regulate the difficulty of in situ polarization of the composite fiber. Before use, MXene was placed in deoxygenated water, ultrasonicated for 3 h at a temperature of 4 °C in a nitrogen-protected environment, and then centrifuged and dried to obtain MXene nanosheets with a diameter of 20-200 nm. First, add a certain amount of PVDF powder into the DMF solution, and stir until it is completely dissolved to form a clear solution; then add a certain amount of PZT, and stir until a stable suspension is formed; thirdly, add a certain amount of MXene, and stir again until a suspension is formed. Turbid solution; finally, put the prepared suspension into ...

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Abstract

The invention provides a flexible self-driven sensor for sensing temperature and touch. The flexible self-driven sensor comprises a composite fiber layer, Au electrodes and a PDMS layer, wherein the composite fiber layer is composed of PZT, MXene and PVDF, and PDMS is filled between composite fibers; the Au electrodes are arranged at the two ends of the composite fiber layer; the invention also provides a preparation method of the flexible self-driven sensor for sensing temperature and touch. According to the flexible self-driven multifunctional sensor for sensing temperature and touch and the preparation method of the flexible self-driven multifunctional sensor, operation is easy, practicability is high, the sensor has high sensing performance, flexibility and mechanical strength, the stable sensing capacity can still be kept after accumulated polarization inversion, and the flexible self-driven multifunctional sensor is suitable for being used for sensing temperature and touch. And meanwhile, leakage of toxic substances such as lead can be effectively prevented.

Description

technical field [0001] The invention relates to the technical fields of new energy materials and information materials, in particular to a flexible self-driven sensor for sensing temperature and touch and a preparation method thereof. Background technique [0002] The principle of the temperature and touch sensor is to generate thermoelectric potential and piezoelectric potential by the temperature and shape change of the material. Sensors that sense temperature and touch are widely used in various fields of military and national economy. Mainly used for intelligent equipment information transmission, industrial automatic control, medical diagnosis, etc. [0003] At present, there are many materials used in the field of sensors, but they have the following problems: (1) The service life is short, mainly manifested in the high leakage current and serious fatigue problems after the accumulated polarization reversal, resulting in Poor sensing ability; (2) The mechanical stren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/00G01L1/16D01D5/00H02N11/00H02N2/18
CPCG01K7/003G01L1/16D01D5/003H02N11/002H02N2/186
Inventor 杨涛吕煜诚王恩会侯新梅方志周林林薛优刘爽郑亚鹏徐兵邢原铭王博
Owner UNIV OF SCI & TECH BEIJING
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