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Flexible gas-sensitive thin film, as well as preparation method and application thereof

A flexible and thin-film technology, applied in the field of flexible gas-sensitive thin films and their preparation, can solve the problems of complex functional modification process, weak adsorption capacity of gas molecules, unsuitable for gas-phase sensing, etc., so as to improve the transparency and gas response performance, The effect of improving transparency, good flexibility and extensibility

Active Publication Date: 2017-05-31
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, optical sensors based on PDA-like conjugated polymers are mainly used in the form of PDA vesicles, PDA liposome complexes or PDA nanocomposites. The functional modification process is complicated and not easy to carry. It is suitable for liquid phase system sensing, and its adsorption capacity for gas molecules is weak, so it is not suitable for gas phase sensing

Method used

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  • Flexible gas-sensitive thin film, as well as preparation method and application thereof
  • Flexible gas-sensitive thin film, as well as preparation method and application thereof
  • Flexible gas-sensitive thin film, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] A method for preparing a flexible gas-sensitive film, comprising the following steps:

[0073] (1) Weigh 1g MoS 2The solid was added to 500mL NMP and ultrasonicated for 72 hours. The power of the ultrasonic wave was 500W. After the ultrasonic wave was completed, it was centrifuged at a speed of 5000rpm for 30min, and the supernatant was collected after centrifugation; After drying, the exfoliated MoS flakes were obtained 2 2D materials;

[0074] (2) Take 1 mg of the above lamellar MoS 2 Two-dimensional material, add 1mL ethanol, ultrasonically disperse evenly, get MoS 2 Dispersion: 10 mg of 10,12-pentacosadiynoic acid (PCDA) was dissolved in 1 mL of ethanol solution, and after filtration, PCDA monomer solution was obtained;

[0075] (3) Add 10 μL of the above MoS 2 The dispersion was mixed with 100 μL of PCDA solution, ultrasonicated at 1200 W for 10 minutes, and then vigorously stirred for 30 minutes to obtain MoS 2 / PCDA precursor solution;

[0076] (4) Get PE...

Embodiment 2

[0079] A method for preparing a flexible gas-sensitive film, comprising the following steps:

[0080] (1) Using the same method as in Example 1, the exfoliated MoS flakes were obtained 2 2D materials;

[0081] (2) Take 1 mg of the above lamellar MoS 2 Two-dimensional material, add 1mL ethanol, ultrasonically disperse evenly, get MoS 2 Dispersion liquid: Dissolve 10 mg of PCDA in 1 mL of ethanol solution, filter to remove oligomers, and obtain PCDA monomer solution;

[0082] (3) Add 20 μL of the above MoS 2 The dispersion was mixed with 100 μL of PCDA solution, ultrasonicated at 1200 W for 10 minutes, and then vigorously stirred for 30 minutes to obtain MoS 2 / PCDA precursor solution;

[0083] (4) Take the PET film, after plasma hydrophilic treatment, the MoS 2 / PCDA precursor solution is spin-coated on a hydrophilic PET film and dried for 24 hours; then 252nm ultraviolet light is used for 10 minutes to obtain a blue uniform and transparent flexible gas-sensitive film, w...

Embodiment 3

[0085] A method for preparing a flexible gas-sensitive film, comprising the following steps:

[0086] (1) Using the same method as in Example 1, the exfoliated MoS flakes were obtained 2 2D materials;

[0087] (2) Take 1 mg of the above lamellar MoS 2 Two-dimensional material, add 1mL ethanol, ultrasonically disperse evenly, get MoS 2 Dispersion liquid: Dissolve 10 mg of PCDA in 1 mL of ethanol solution, filter to remove oligomers, and obtain PCDA monomer solution;

[0088] (3) Add 50 μL of the above MoS 2 The dispersion was mixed with 100 μL of PCDA solution, ultrasonicated at 1200 W for 10 minutes, and then vigorously stirred for 30 minutes to obtain MoS 2 / PCDA precursor solution;

[0089] (4) Take the PET film, after plasma hydrophilic treatment, the MoS 2 / PCDA precursor solution is spin-coated on a hydrophilic PET film and dried for 24 hours; then 252nm ultraviolet light is used for 10 minutes to obtain a blue uniform and transparent flexible gas-sensitive film, w...

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Abstract

The invention provides a flexible gas-sensitive thin film, which is prepared by compounding a two-dimensional transition metal sulfide material and polydiacetylene, wherein the polydiacetylene is prepared by ultraviolet polymerization of a diacetylene monomer, and the general structural formula of the diacetylene monomer is shown in formula (I), which is shown in the specification, where R1 is an aryl group, an alkyl group with 5 to 20 carbon atoms or a naphthene base with 1 to 10 carbon atoms, R2 is a single bond, an alkylidene group with 3 to 20 carbon atoms or a disubstituted or unsubstituted aryl group. According to the flexible gas-sensitive thin film, the advantages of the two-dimensional transition metal sulfide material and the polydiacetylene are combined, and the coordination adsorption behavior of organic steam can be converted into a visual sensing signal to implement specific efficient sensing of the organic steam. The invention also provides a preparation method for the flexible gas-sensitive thin film and application thereof to organic steam detection.

Description

technical field [0001] The invention relates to the technical field of organic vapor sensing and devices, in particular to a flexible gas-sensitive film and its preparation method and application. Background technique [0002] In recent years, with the rapid development of social economy and the improvement of industrialization and urbanization, the problem of air pollution has become increasingly serious. Excellent performance, portable, fast and stable gas pollution detection technology is of great significance to the effective control and governance of air pollution. Volatile Organic Compounds (Volatile Organic Compounds, VOCs, organic vapors) have a wide range of sources, great harm, and fast migration, which has become the focus and difficulty of air pollution monitoring. For example, DMF (dimethylformamide) can be used as an organic solvent and raw material for a series of products for domestic and industrial consumption such as pesticides, hormones, dyes, and synthet...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L49/00C08K3/30C08F138/00G01N21/33
Inventor 张晗王婷张家宜
Owner SHENZHEN UNIV
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