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Preparation method of dissolved oxygen sensing film

A technology of sensing film and dissolved oxygen, which is applied in measuring devices, instruments, fluorescence/phosphorescence, etc., can solve problems such as leakage and reduce the optical characteristics of indicators, and achieve the effects of reducing maintenance cycles, ensuring optics, and improving performance

Active Publication Date: 2017-01-25
SUN YAT SEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The core component of the photochemical oxygen sensor is the dissolved oxygen sensing film, which contains an oxygen-sensitive indicator and a solid matrix. The stability of the indicator has an important impact on the performance of the sensor, but it is prone to leakage during use; or to maintain stability and is fixed in the matrix by chemical bonding, but this chemical bonding method will reduce the optical properties of the indicator to a certain extent

Method used

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  • Preparation method of dissolved oxygen sensing film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Put 1 volume of tetraethoxysilane and 1 volume of trifluoromethyltrimethoxysilane into the reaction kettle, add 0.2 volumes of water and 2 volumes of a mixed solution of propanol and butanol, add maleic acid, and control the pH range to 1.0, sealed and stirred for 3 hours, added 0.5 volume of tris(2,2′-bipyridine) ruthenium (II) complex propanol solution, ultrasonically dispersed for 20 minutes, and aged in a dark room for 24 hours.

[0026] At 25°C, the oil phase and the water phase with a mass ratio of 12:88 were mixed with magnetic stirring to form a microemulsion. The components of the oil phase are AOT, Triton and decane, and the components of the water phase are acrylamide, sodium acrylate and tris(2,2'-bipyridine) ruthenium (II) complex. After the microemulsion is formed, the particle size of the emulsion is controlled at 20nm, and then an appropriate amount of initiator solution (a mixed aqueous solution of potassium persulfate and sodium bisulfite, the concentr...

Embodiment 2

[0030] Put 1 volume of tetraethoxysilane and 1 volume of trifluoromethyltrimethoxysilane into the reaction kettle, add 0.2 volumes of water and 2 volumes of propanol-butanol mixed solution, add succinic acid, control the pH range to 2.0, seal and stir After 1 hour, add 0.5 volume of tris(5-amino-1,10-phenanthroline) ruthenium propanol solution, ultrasonically disperse for 10 minutes, and put it in a dark room for aging for 48 hours.

[0031] At 25°C, the oil phase and the water phase with a mass ratio of 16:84 are mixed with magnetic stirring to form a microemulsion. The oil phase components are AOT, Triton, and decane, and the water phase is composed of acrylamide and sodium acrylate. And three (5-amino-1,10-phenanthroline) ruthenium (Ⅱ) complexes. After the microemulsion is formed, the particle size of the emulsion is controlled at 50nm, and then an appropriate amount of initiator solution (mixed aqueous solution of potassium persulfate and sodium bisulfite, with a concentra...

Embodiment 3

[0035] Put 1 volume of tetraethoxysilane and 1 volume of trifluoromethyltrimethoxysilane into the reaction kettle, add 0.2 volumes of water and 2 volumes of propanol-butanol mixed solution, add benzenesulfonic acid derivatives, and control the pH range to 1.8 , sealed and stirred for 2.5 hours, added 0.5 volume of tris(4,7-diphenyl-1,10-phenanthroline) ruthenium (II) complex propanol solution, ultrasonically dispersed for 20 minutes, and put it in a light-proof room for aging 36h.

[0036] At 50°C, the oil phase and the water phase with a mass ratio of 20:80 are mixed with magnetic stirring to form a microemulsion, in which the oil phase components are AOT, Triton, and decane, and the water phase components are acrylamide and sodium acrylate. And three (4,7-diphenyl-1,10-phenanthroline) ruthenium (Ⅱ) complexes. After the microemulsion is formed, the particle size of the emulsion is controlled at 40nm, and then an appropriate amount of initiator solution (mixed aqueous solutio...

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Abstract

The invention belongs to the field of a surface thin film material for a dissolved oxygen sensor and in particular relates to a preparation method of a dissolved oxygen sensing film. Based on a fluorescence quenching principle, the invention provides the preparation method of the dissolved oxygen sensing film; a sol-gel method is mainly adopted and a lyophobic functional group with higher polarity is introduced; the service life of the sensing film is enhanced through the lyophobic functional group, so that the sensitivity is enhanced; single-dispersion nanoparticles carrying an indicator are prepared through a micro-emulsion method; the preparation method is simple; the oxytropism of a traditional dissolved oxygen sensing film and the stability of the indicator are improved; the maintenance period can be directly shortened and performances can be directly improved when the dissolved oxygen sensing film is applied to the dissolved oxygen sensor.

Description

technical field [0001] The invention belongs to the field of surface film materials used in dissolved oxygen sensors, and in particular relates to a preparation method of a dissolved oxygen sensing film. Background technique [0002] With the development of optical fiber technology, optical fiber chemical sensors based on the principle of fluorescence quenching of transition metal complexes have been continuously applied, and dissolved oxygen sensors based on the principle of fluorescence quenching mostly use the quenching attenuation of fluorescence intensity, and the fluorescence lifetime As an intrinsic feature of phosphors, they are less susceptible to external interference. Therefore, photochemical oxygen sensors based on fluorescence lifetime detection have better application value. The core component of the photochemical oxygen sensor is the dissolved oxygen sensing membrane, which contains an oxygen-sensitive indicator and a solid matrix. The stability of the indicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
CPCG01N21/6428
Inventor 曾晖陈宏霖
Owner SUN YAT SEN UNIV
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