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Composite sensing membrane composed of polypyrrole, fluorescein isothiocyanate and porous alumina as well as preparation method and application thereof

A technology of fluorescein isothiocyanate and porous alumina, which is applied in the fields of fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems that cannot be used for other purposes, cannot be prepared, cannot be used, etc., and achieve the effect of excellent optical properties

Inactive Publication Date: 2012-09-05
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both the conductive polypyrrole nanomaterial and its preparation method have deficiencies. First, the conductive polypyrrole nanomaterial formed as a composite polypyrrole in a porous alumina membrane is only a conductive polymer. It can only be used for conduction, and can not be used as other uses, especially can not be used for the rapid trace detection of environmental toxic pollutant 2,3,3'-trichlorobiphenyl (PCB20); Composite Porous Alumina Films for Rapid Trace Detection of 2,3,3′-Trichlorobiphenyl

Method used

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  • Composite sensing membrane composed of polypyrrole, fluorescein isothiocyanate and porous alumina as well as preparation method and application thereof
  • Composite sensing membrane composed of polypyrrole, fluorescein isothiocyanate and porous alumina as well as preparation method and application thereof
  • Composite sensing membrane composed of polypyrrole, fluorescein isothiocyanate and porous alumina as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The concrete steps of preparation are:

[0029] Step 1, first drop the 0.4M pyrrole ethanol aqueous solution and the 0.8M ferric chloride aqueous solution onto the porous alumina film successively; After the aluminum film was placed under a negative pressure of 0.06 MPa for 12 minutes, it was cleaned ultrasonically with deionized water and ethanol, and an approximate figure 1 B and figure 1 Its surface and hole inner wall shown in C are covered with the porous aluminum oxide film of polypyrrole.

[0030] Step 2, first soak the porous alumina film covered with polypyrrole on the surface and the inner wall of the hole for 1.2h in a concentration of 10-3M fluorescein isothiocyanate ethanol solution; then use ethanol to wash off the porous alumina film Fluorescein isothiocyanate on the surface, made approximately figure 1 D and figure 1 The composite sensing membrane composed of polypyrrole, fluorescein isothiocyanate and porous alumina shown in the curve in E.

Embodiment 2

[0032] The concrete steps of preparation are:

[0033] Step 1, first drip the 0.45M pyrrole ethanol aqueous solution and the 0.9M ferric chloride aqueous solution onto the porous alumina film successively; After the aluminum film was placed under a negative pressure of 0.07MPa for 11.5min, it was cleaned ultrasonically with deionized water and ethanol, and an approximate figure 1 B and figure 1 Its surface and hole inner wall shown in C are covered with the porous aluminum oxide film of polypyrrole.

[0034] Step 2, first place the porous alumina film covered with polypyrrole on the surface and the inner wall of the hole at a concentration of 0.5 × 10 -3 Soak in the fluorescein isothiocyanate ethanol solution of M for 1.2h; then use ethanol to wash off the fluorescein isothiocyanate on the surface of the porous alumina film, and obtain a product similar to figure 1 D and figure 1 The composite sensing membrane composed of polypyrrole, fluorescein isothiocyanate and porous ...

Embodiment 3

[0036] The concrete steps of preparation are:

[0037] Step 1, first drop the 0.5M pyrrole ethanol aqueous solution and the 1M ferric chloride aqueous solution onto the porous alumina film successively; After the film was placed under a negative pressure of 0.08MPa for 11 minutes, it was ultrasonically cleaned with deionized water and ethanol to obtain the following figure 1 B and figure 1 Its surface and hole inner wall shown in C are covered with the porous aluminum oxide film of polypyrrole.

[0038] Step 2, first place the porous alumina film covered with polypyrrole on the surface and the inner wall of the hole at a concentration of 10 -4 Soak in the fluorescein isothiocyanate ethanol solution of M for 1.1h; then use ethanol to wash off the fluorescein isothiocyanate on the surface of the porous aluminum oxide film to obtain the following figure 1 D and figure 1 The composite sensing membrane composed of polypyrrole, fluorescein isothiocyanate and porous alumina shown...

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Abstract

The invention discloses a composite sensing membrane composed of polypyrrole, fluorescein isothiocyanate and porous alumina as well as a preparation method and an application of the composite sensing membrane. The composite sensing membrane is formed by orderly coating inner walls of the hole of a porous alumina membrane with polypyrrole and fluorescein isothiocyanate, wherein the porous alumina membrane is 70-90 mu m, the hole density is 109-1011 / cm<2>, the holes are through holes, and the diameter of each hole is 26-35nm. The preparation method comprises the following steps of: orderly dropping pyrrole ethanol solution and ferric chloride solution to the porous alumina membrane; putting the porous alumina membrane with the pyrrole ethanol solution and the ferric chloride solution under the negative pressure equal to or less than 0.1MPa for at least 10min; carrying out the ultrasonic cleaning to the porous alumina membrane with deionized water and ethanol so as to obtain the porous alumina membrane coated with polypyrrole on the surface and the inner wall of the holes; then immersing the porous alumina membrane into the fluorescein isothiocyanate ethanol solution with the concentration of 10<-3> to 10<-5>M for at least one hour; and washing the fluorescein isothiocyanate on the surface of the porous alumina membrane with ethanol to obtain the target product (composite sensing membrane). According to the composite sensing membrane, the trace 2,3,3'-trichlorodiphenyl can be effectively detected.

Description

technical field [0001] The invention relates to a composite sensing film, its preparation method and application, in particular to a composite sensing film composed of polypyrrole, fluorescein isothiocyanate and porous alumina, its preparation method and application. Background technique [0002] In recent years, the porous aluminum oxide film obtained by anodic oxidation has attracted widespread attention because of its advantages of uniform pore arrangement and uniform pore size. They intend to use it as a basis to compound different substances to explore and expand applications. range, improve and enhance the original performance, such as a "method for the preparation of conductive polymer pyrrole nanomaterials by alternating current electrochemical" disclosed in the Chinese invention patent application publication specification CN 1460733A published on December 10, 2003. It uses the AAO / Al composite electrode obtained by anodizing high-purity aluminum foil in acid soluti...

Claims

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Application Information

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IPC IPC(8): G01N21/64C08G73/06
Inventor 王美玲孟国文
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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