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A fluorescent responsive thin film material with humidity sensitive properties and its preparation method

A technology of fluorescent response and thin film materials, applied in the field of fluorescent response thin film materials and their preparation, to achieve the effect of broadening the application space and the range of preparation

Active Publication Date: 2016-08-17
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, fluorescent materials with fast and reversible monitoring of humidity changes are rarely reported.
At the same time, in order to meet the realization of future humidity fluorescent devices and sensing functions, it is still a challenge to prepare humidity-sensitive fluorescent thin film materials through facile and effective methods.

Method used

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  • A fluorescent responsive thin film material with humidity sensitive properties and its preparation method
  • A fluorescent responsive thin film material with humidity sensitive properties and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Weigh 0.0265g (4-(4-(dimethylamino) styryl) pyridine compound DSP, and 5.3g polyvinylpyrrolidone PVP;

[0027] 2) Mix the two evenly, put them into 15ml of methanol solution, and stir for two hours at 3000r / min in a 20ml beaker;

[0028] 3) Preparation of fluorescent film:

[0029] a. Preparation of the electrospinning instrument: adjust the distance between the needle and the collection screen to 17cm; the humidity in the instrument is 30%; the temperature is 50°C; the shape of the needle of the spinneret is selected as round;

[0030] b. Add the methanol solution containing DSP and PVP into the nozzle device;

[0031] c. Applying a high voltage of 22KV, the solution is converted into a charged jet under the action of the high voltage, and the jet is deposited on the surface of the substrate;

[0032] d. And the polymer in the jet solidifies to form nanofibers, eventually forming a white film under natural light.

Embodiment 2

[0034] 1) Weigh 0.0530g (4-(4-(dimethylamino) styryl) pyridine compound DSP, and 5.3g polyvinylpyrrolidone PVP;

[0035] 2) Mix the two evenly, put them into 25ml of methanol solution, and stir for two hours at 2000r / min in a 50ml beaker;

[0036] 3) Preparation of fluorescent film:

[0037] a. Preparation of the electrospinning instrument: adjust the distance between the needle and the collection screen to 17cm; the humidity in the instrument is 25%; the temperature is 50°C; the shape of the needle of the spinneret is selected as round;

[0038] b. Add the methanol solution containing DSP and PVP into the nozzle device;

[0039] c. Applying a high voltage of 22KV, the solution is converted into a charged jet under the action of the high voltage, and the jet is deposited on the surface of the substrate;

[0040] d. And the polymer in the jet solidifies to form nanofibers, eventually forming a white film under natural light.

[0041] Characterization of the products in Examp...

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Abstract

The present invention discloses a fluorescent response thin-film material having the humidity sensitive characteristics and a preparation method thereof. According to the invention, 4-(4-(dimethylamino) styryl) pyridine and polyvinylpyrrolidone polymer are compounded through the electrostatic spinning method to obtain a novel fluorescent thin-film material. The single 4-(4-(dimethylamino) styryl) pyridine does not have the humidity-sensitive fluorescent color-changing feature alone. Through adding the polymer having the dispersing effect, the spatial arrangement manner and the intermolecular interaction of 4-(4-(dimethylamino) styryl) pyridine organic molecules are changed. In this way, the fluorescent properties of the 4-(4-(dimethylamino) styryl) pyridine and polymer composite film is quickly changed according to different relative humidities of the environment. The above composite material fully utilizes the electrostatic spinning technique, and a thin film of high dispersibility and high specific surface can be prepared. Therefore, the invention provides a novel approach for the design and the manufacture of humidity-sensitive fluorescent sensors excellent in optical properties, and hygrometers short in response time and high in accuracy.

Description

technical field [0001] The invention belongs to the technical field of optical sensing materials, and in particular provides a fluorescent responsive film material with humidity sensitive properties and a preparation method thereof. It provides a new design idea and feasible scheme for the preparation of new fluorescent sensing thin film materials. Background technique [0002] Humidity is an important external factor in the human living environment, and relative humidity usually indicates the percentage of moisture contained in the air. Efficient and rapid monitoring of humidity is of great significance to many fields such as environmental protection, meteorology, aviation, food, light industry, chemicals, and pharmaceuticals. Currently, common humidity sensors (such as hygrometers) are based on the electronic principle of semiconductor components. Changes in the external humidity lead to changes in the electrical characteristics of semiconductor components (such as resis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06D01F6/56D01F1/10D04H1/4282D04H1/728
Inventor 闫东鹏方晓雨高瑞
Owner BEIJING NORMAL UNIVERSITY
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