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Preparation method of porous TiO2/NaPSS composite sensitive material and product thereof

A technology for compounding sensitive, polystyrene microspheres, applied in the field of materials

Inactive Publication Date: 2020-10-30
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few reports on the sensitivity, linearity, repeatability and other moisture-sensitive characteristics of NaPSS-based composites in the above researches.

Method used

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  • Preparation method of porous TiO2/NaPSS composite sensitive material and product thereof
  • Preparation method of porous TiO2/NaPSS composite sensitive material and product thereof
  • Preparation method of porous TiO2/NaPSS composite sensitive material and product thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1, porous TiO 2 Preparation of composite sensitive materials of NaPSS

[0026] In this experiment, porous TiO was prepared by template method combined with spin coating method. 2 / NaPSS composite sensitive material, the specific steps are as follows: firstly, the interdigitated electrode is ultrasonically cleaned with absolute ethanol and acetone, and 1000nm polystyrene microspheres and 0.3mol / L titanium tetrachloride aqueous solution are evenly coated on the surface by spin coating method. On the interdigitated electrode substrate, dry it at 100°C for 1 hour; then put the sample into a dichloromethane solution and sonicate it for 2-10 minutes to dissolve the polystyrene microspheres in the sample, and drive the solution at a constant temperature of 200°C for 1 hour. Porous TiO 2 membrane; then prepare an aqueous solution of sodium polystyrene sulfonate with a mass fraction of 1%, and appropriately add sodium carboxymethyl cellulose to improve the viscosity...

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Abstract

The invention discloses a preparation method of a porous TiO2 / NaPSS composite sensitive material and a product thereof. The preparation method specifically comprises the steps of firstly, uniformly coating polystyrene microspheres and a titanium tetrachloride aqueous solution on a cleaned interdigital electrode through a spin-coating method, and drying; secondly, putting the dried electrode into adichloromethane solution, ultrasonically dissolving the polystyrene microspheres, and performing solution driving to obtain an interdigital electrode with a porous TiO2 film; and finally, coating theinterdigital electrode with the porous TiO2 film with a sodium polystyrenesulfonate solution added with sodium carboxymethyl cellulose by adopting an impregnation method to obtain the porous TiO2 / NaPSS composite sensitive material. The prepared material has the advantages of reduced impedance value and humidity hysteresis difference, enhanced linear relationship, accelerated response speed and greatly improved repetitive stability, and can have wide application prospects in the aspect of humidity sensors.

Description

technical field [0001] The invention relates to the field of materials, in particular to porous TiO 2 The preparation method of the composite sensitive material of / NaPSS also relates to the product that is made by this method. Background technique [0002] Humidity sensors play an important role in the detection of the environment in the fields of biopharmaceuticals, scientific research, meteorology, and industrial production. In recent years, people have done a lot of research on high-performance humidity sensors: sensitivity, linearity, hysteresis and response speed are the main parameters to evaluate the performance of humidity sensors, and the key to the above performance is polymers, carbon nanotubes, Research on moisture-sensitive materials such as inorganic oxides, porous silicon, graphene, and their nanocomposites. Among them, the polymer moisture-sensitive material has excellent properties such as high sensitivity, moderate impedance change range, and fast respons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/02
CPCG01N27/02
Inventor 张晓宇张楠杨文耀段良菊查小婷侯超邓泽毅彭清林
Owner CHONGQING UNIV OF ARTS & SCI
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