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A method for detection of explosives by tetraarylethene fluorescent nanofibers

A fluorescent nanofiber, tetraarylethene technology, applied in the direction of fluorescence/phosphorescence, material excitation analysis, etc., to achieve the effects of no environmental pollution, low cost, and easy operation

Active Publication Date: 2018-03-13
NANJING UNIV OF POSTS & TELECOMM
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  • Application Information

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Problems solved by technology

Compared with the previously reported detection methods, this detection method not only has the advantages of simple operation, low cost, and high sensitivity, but also has unique characteristics such as safety, non-toxicity, no pollution to the environment, multiple repeatable detections, and economical applicability. advantage, which has never been reported in the literature

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  • A method for detection of explosives by tetraarylethene fluorescent nanofibers
  • A method for detection of explosives by tetraarylethene fluorescent nanofibers
  • A method for detection of explosives by tetraarylethene fluorescent nanofibers

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specific Embodiment approach

[0029] Step 1: Prepare a P(VDF-HFP) solution and a chloroform solution of TPE-2ptol, and then mix the two to prepare a TPE-2ptol / P(VDF-HFP) solution;

[0030] Acetone (Acetone, Act) and N, N-dimethylacetamide (Dimethylacetamide, DMAC) are mixed in the ratio of 7:3 by volume, obtain mixed solvent, then P (VDF-HFP) and mixed solvent are mixed with 13: Mix at a mass ratio of 87, stir and dissolve at 50°C for 12 hours (hours) to obtain a P(VDF-HFP) solution;

[0031] Dissolve 0.2g of TPE-2ptol in 1mL of chloroform solution to obtain a nearly saturated solution of TPE-2ptol;

[0032] The prepared two solutions are prepared according to different mass ratios of TPE-2ptol / P (VDF-HFP) solutions with a series of different mass fractions such as 5%, 10%, 15% and 20%, and TPE with a mass fraction of 5% is prepared -2ptol / P(VDF-HFP) solution, the mass ratio of TPE-2ptol to P(VDF-HFP) is 5:95, when preparing TPE-2ptol / P(VDF-HFP) solution with a mass fraction of 10%, TPE- The mass ratio o...

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Abstract

The invention discloses a method for detecting explosives by tetraarylethene fluorescent nanofibers. The steps are as follows: Step 1: preparing a P(VDF-HFP) solution and a chloroform solution of TPE-2ptol, and then mixing the two to prepare TPE-2ptol / P(VDF-HFP) solution; Step 2: Electrospinning the TPE-2ptol / P(VDF-HFP) solution to prepare TPE-2ptol / P(VDF-HFP) nanofiber membrane; Step 3: To the TPE-2ptol / P (VDF-HFP) nanofiber membrane, gradually add different concentrations of PA solutions for detection; Step 4: use the Stern-Volmer equation to explain the quenching of different PAs, and obtain the Stern-Volmer constant, That is, the quenching constant of the fluorescent nanofiber film to PA. Step 5: Under the same conditions, add PA and common interferent solutions to the TPE-2ptol / P(VDF-HFP) nanofiber membrane dropwise, and study the selectivity of the nanofiber membrane to PA. The invention has the advantages of simple and convenient operation, low cost, high sensitivity, safety, non-toxicity, no pollution to the environment, multiple repeatable detections, economical applicability and the like.

Description

technical field [0001] The invention relates to the field of explosive detection technology and electrospinning technology, in particular to a method for detecting explosives by tetraarylethene fluorescent nanofibers. Background technique [0002] Explosives bring huge hidden dangers to the environment and human beings, have prominent public safety threats and ecological damage, and are also potential carcinogens. Therefore, it is of great significance to study new methods for the detection of micro-trace explosives for the prevention of terrorist crimes and environmental pollution monitoring. The main components of explosives are nitroaromatic compounds. Among the current detection technologies for nitroaromatic compounds, fluorescence detection technology has the advantages of high sensitivity, good stability, small sensor size, fast detection speed, low cost, and easy operation. Widely used (Salinas Y, Martínez- R,Marcos M D,etal.Optical chemosensors and reagents to de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
Inventor 叶尚辉刘丽萍周舟黄维
Owner NANJING UNIV OF POSTS & TELECOMM
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