High-molecular gas sensitive material as well as preparation method and application thereof

A technology of gas-sensitive materials and polymers, which is applied in the field of polymer gas-sensitive materials and their preparation, can solve the problems of inability to have both responsivity and good recovery, achieve recovery rate and reuse rate, and increase the scope of application , the effect of large porosity

Inactive Publication Date: 2015-03-25
ZHENGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above defects, the present invention provides a new polymer gas sensitive material, which solves the problem that high responsivity and good recovery cannot be possessed at the same time; it has prepared a material with high responsivity, response rate, recovery rate and reusability. Very high polymer gas sensitive material

Method used

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  • High-molecular gas sensitive material as well as preparation method and application thereof
  • High-molecular gas sensitive material as well as preparation method and application thereof
  • High-molecular gas sensitive material as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0041] The preparation of embodiment 1 polymer gas-sensitive material

[0042] Preparation method: the specific preparation steps are as follows:

[0043] (1) Configuration of PA6 formic acid solution: Mix 1.5g of nylon 6 and 5ml of formic acid in a 50ml round bottom flask, then mechanically blend at 75°C for 1.5 hours to prepare a nylon 6 solution with a mass fraction of 20%.

[0044] (2) Electrospinning: under the action of high-voltage static electricity, the PA6 solution obtained in step 1 will form a Taylor cone at the spinneret. When the electric field strength reaches a critical value, the electric field force can overcome the surface tension of the liquid. A charged jet stream is formed at the thread opening; during the jetting process, due to the rapid increase in the surface area of ​​the jet stream, the solvent volatilizes, the fibers solidify and are arranged in disorder on the collecting device, thereby obtaining a fiber film with a thickness of 0.3-3 μm and an av...

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PUM

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Abstract

The invention belongs to the field of gas sensitive materials, and particularly relates to a high-molecular gas sensitive material as well as a preparation method and application thereof. The invention provides the high-molecular gas sensitive material which is a composite material having a conductive network structure and prepared from electro-woven nylon nanometer fiber films modified by conductive fillers. The high-molecular gas sensitive material disclosed by the invention can be used for solving the problem of impossible coexistence of high responsibility and good reversibility and is quite high in responsibility, response rate, resilience speed and recycle rate.

Description

technical field [0001] The invention belongs to the field of gas-sensing materials, and in particular relates to a polymer gas-sensing material and its preparation method and application. Background technique [0002] Advanced chemical gas detection materials need to have low detection limit, high responsivity and response rate, good recovery and good physical properties (flexibility, lightness, etc.). Traditional chemical gas-sensitive materials often use semiconductor oxides as conductive fillers, and rigid materials such as quartz and ceramics as substrates. This inorganic composite material has a high response to chemical gases, but its high processing temperature and poor flexibility greatly limit the application of this material; in addition, this sensitive material generally has a low response to organic gases. [0003] Conductive polymer composite (CPC) refers to a multi-phase composite system with conductive function obtained by adding various conductive fillers th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00
Inventor 代坤李勇徐卓言王亚龙翟威刘春太郑国强申长雨
Owner ZHENGZHOU UNIV
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