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High-molecular polymer based resistance type humidity sensor and manufacturing and testing method thereof

A high-molecular polymer and humidity sensor technology, applied in the direction of material resistance, etc., to achieve the effect of strong designability, simple preparation and high stability

Active Publication Date: 2015-01-14
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it is not suitable for higher temperature, strong acid, strong alkali and other harsh environment detection and industrial environment monitoring with high precision requirements

Method used

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  • High-molecular polymer based resistance type humidity sensor and manufacturing and testing method thereof
  • High-molecular polymer based resistance type humidity sensor and manufacturing and testing method thereof
  • High-molecular polymer based resistance type humidity sensor and manufacturing and testing method thereof

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Experimental program
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Effect test

Embodiment 1

[0045] Prepare a sensor with a diameter of 5mm and a thickness of 2mm:

[0046] The first step is to prepare the moisture-sensitive material layer 1:

[0047] Use the Nafion solution to solidify and form the moisture-sensitive material layer 1 according to the conventional method with the designed thickness.

[0048] Raw materials: Nafion solution, sec-butanol, dimethyl sulfoxide (DMSO)

[0049] a. According to the size of the moisture-sensitive material layer 1, the amount of Nafion solution used is 300 mL. Nafion DES 520cs, with a concentration of 5%wt, Nafion as a solute, and a 1:1 mixture of sec-butanol and water as a solvent, is dried to a concentration of 20-50%, and the temperature of the vacuum oven is controlled at 50-60°C.

[0050] b. Add an appropriate amount of DMSO dropwise into the solution (the volume ratio is DMSO:Nafion≈1:20~50) to prepare the casting solution. Then put the casting solution in an oven at 50-60°C until the surface is dry.

[0051] c. Raise ...

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Abstract

The invention discloses a high-molecular polymer based resistance type humidity sensor and a manufacturing and testing method thereof. The high-molecular polymer based resistance type humidity sensor is of a cylindrical structure and comprises a humidity sensitivity material layer, a metal resistance layer and a lead terminal, wherein the humidity sensitivity material layer is arranged in the middle, the cross section of the humidity sensitivity material layer is round and provided with a protruding part, the humidity sensitivity material layer is formed by solidifying Nafion solution, a Pt membrane is chemically coated on the lateral surface of the humidity sensitivity material layer, a metal resistance layer can be obtained by removing the Pt membrane on the protruding part, and 2-3mm<2> titanium membranes are coated on the surfaces close to the connection portions at two ends of the metal resistance layer to serve as the lead terminal. The humidity sensitivity material layer is prepared by solidifying the Nafion solution, the upper surface and the lower surface of the humidity sensitivity material layer adopt polyurethane protection, and after the lateral surfaces are performed with coarsening, activating and acid leaching, and then an outer electrode and an inner electrode are coated; and after the inner electrode and the outer electrode are coated, the metal layer on the surface of the protruding part is removed, and then the titanium membranes are coated on the on the surfaces close to the connection portions of the metal resistance layer to manufacture the lead terminal in a vacuum evaporation coating method.

Description

technical field [0001] The invention belongs to a novel humidity sensor and can be used in the fields of industrial production, biology, medical treatment, aerospace and the like. Background technique [0002] Humidity sensors are an important class of chemical sensors, which have been widely used in industrial production, process control, environmental monitoring, meteorology, aerospace and other fields, such as: manufacturing of precision electronic components, storage of space missiles and rockets. In order to create a better medical environment, industrial experiment environment, and aerospace production environment, it is essential to detect, control or adjust humidity. [0003] Organic polymer moisture-sensitive materials have been developed more and more due to their rich material sources, wide relative humidity range, small hysteresis hysteresis, and fast response speed. They are the most promising type of moisture-sensitive materials. . The early polymer moisture-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/04
Inventor 熊克卞侃吴佳俊潘潇陈宏
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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