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Flexible humidity sensing material, sensor and preparation method thereof

A humidity sensor and humidity sensing technology, applied in the direction of analyzing materials, material resistance, material analysis through electromagnetic means, etc., can solve problems such as prone to accidents and a lot of sweating

Pending Publication Date: 2022-03-22
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, accidents are prone to occur during radiotherapy. Some patients cannot bear the large radiation dose during radiotherapy, and there will be more obvious physical reactions, such as profuse sweating

Method used

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  • Flexible humidity sensing material, sensor and preparation method thereof
  • Flexible humidity sensing material, sensor and preparation method thereof
  • Flexible humidity sensing material, sensor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This embodiment introduces the flexible humidity sensing material used in the flexible humidity sensing layer.

[0048] See figure 2 , the flexible humidity sensing material includes: an electrospun membrane and polydopamine 3 and silver nanoparticles 2 attached to the electrospun membrane.

[0049] The above-mentioned silver nanoparticles 2 are used to form a conductive path, and the polydopamine 3 can provide different numbers of proton jumping sites according to different humidity, so that the conductive performance of the flexible humidity sensing material is different under different humidity. At the same time, the electrospun membrane can be comfortably worn on the skin and adheres to the skin. Therefore, a flexible humidity sensor can be prepared using a flexible humidity sensing material, and the humidity can be detected based on the electrical conductivity and humidity sensitivity of the flexible humidity sensing material, so that it can be applied in the det...

Embodiment 2

[0057] This embodiment provides a flexible humidity sensor with a microcone structure, see Figure 4 , the flexible humidity sensor includes: an electrode 5 and a flexible humidity sensing layer 7, the electrode 5 is attached to the surface of the flexible humidity sensing layer 7, and the material of the flexible humidity sensing layer 7 is provided in Example 1 Flexible humidity sensing material. One side of the flexible humidity sensing layer 7 has a raised structure.

[0058] The thickness range of the flexible humidity sensing layer 7 is exemplarily 85 microns.

[0059] The shape of the flexible humidity sensing layer 7 can be square, circular, etc. Those skilled in the art can flexibly design its shape according to the needs, and details will not be described here.

[0060] In one example, the electrode 5 is attached to the side of the flexible humidity sensing layer 7 having a raised structure (such as a micro-cone structure). When the flexible humidity sensor is wor...

Embodiment 3

[0066] see Figure 5 , this embodiment provides a method for preparing the flexible humidity sensing material described in Embodiment 1, the method comprising the following steps:

[0067] Step 11: mixing the polymeric material, silver ion displacing agent, dopamine and water to obtain a precursor solution;

[0068] Step 12: using the precursor solution to prepare an electrospun membrane;

[0069] Step 13: placing the electrospun membrane in a dopamine monomer solution for in-situ polymerization to obtain a first electrospun membrane;

[0070] Step 14: placing the first electrospinning membrane in a silver ion salt solution to carry out a silver ion replacement reaction to obtain a second electrospinning membrane;

[0071] Step 15: placing the second electrospinning membrane in a weak reducing agent, and oxidizing silver nanoparticles on the second electrospinning membrane to obtain a flexible humidity sensing material.

[0072] As mentioned above, in order to speed up the ...

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Abstract

The invention discloses a flexible humidity sensing material, a sensor and a preparation method of the flexible humidity sensing material. The flexible humidity sensing material comprises an electrostatic spinning film, and polydopamine and silver nanoparticles attached to the electrostatic spinning film. The surface of the electrostatic spinning film is provided with a protruding structure. The flexible humidity sensor comprises an electrode and a flexible humidity sensing layer prepared from the flexible humidity sensing material. The preparation method of the flexible humidity sensing material comprises the following steps: mixing a polymeric material, a silver ion displacer, dopamine and water to obtain a precursor solution; preparing an electrostatic spinning membrane by adopting the precursor solution; the electrostatic spinning membranes are sequentially placed in a dopamine monomer solution to be subjected to in-situ polymerization, placed in a silver ion salt solution to be subjected to a silver ion replacement reaction and placed in a weak oxidant and protective agent supplementary solution to be oxidized into silver nanoparticles, and finally the flexible humidity sensing material is obtained. The humidity sensor provided by the invention can be comfortably worn on the human body, and detection of the sweat amount of the human body is realized.

Description

technical field [0001] The invention relates to a flexible humidity sensing material, a sensor and a preparation method thereof. Background technique [0002] As an important part of the treatment of local tumors, the role and status of radiotherapy in tumor treatment has become increasingly prominent. However, accidents are prone to occur during radiotherapy. Some patients cannot bear the large radiation dose during radiotherapy and will have more obvious physical reactions, such as profuse sweating. In order to better monitor the patient's physical condition, it is very important to understand the changes in the patient's body during radiotherapy. Finding a humidity sensor that can effectively monitor the amount of sweat perspired by human skin is crucial. Contents of the invention [0003] The object of the present invention is to provide a flexible humidity sensing material capable of detecting the sweating amount of human skin, a flexible humidity sensor and a prepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 李阳郭楷其朱健于金明岳文静高嵩陈贞翔阚皞张春伟
Owner UNIV OF JINAN