Double-layered electrostatic spinning film sensor for detecting nitryl explosives

A thin-film sensor and electrospinning technology, applied in the field of sensors, can solve the problems such as the application of double-layer electrospun thin-film sensor materials, and achieve the effects of increasing the quenching rate, improving permeability, and reducing the detection limit

Inactive Publication Date: 2016-06-29
QILU UNIV OF TECH
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, no application of double-layer electrospun thin film sensor materials in the detection of nitroaromatics has been found.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Double-layered electrostatic spinning film sensor for detecting nitryl explosives
  • Double-layered electrostatic spinning film sensor for detecting nitryl explosives
  • Double-layered electrostatic spinning film sensor for detecting nitryl explosives

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A synthetic method for fluorescent sensing polymer P, comprising the following steps:

[0062] 2,5-dibromothiophene (200mg, 0.9mmol), polyphenylene vinylene polymer (376mg, 0.9mmol) and 2,7-dibromo-9,9-diphenylfluorene (426.6mg, 0.9mol) Dissolve in anhydrous diisopropylamine (DIPA, 2mL) and anhydrous toluene (30mL), place in a 50ml three-necked flask. Pass through argon for 30 minutes, add PdCl 2 (PPh 3 ) 2 (36mg, 2.6×10 -2 mmol), PPh 3 (270mg, 0.90mmol) and CuI (40.5mg, 0.3mmol). 100 ° C reflux reaction for 24h. Then, according to the purification, the fluorescent sensor polymer P is obtained, and the structural formula is shown in Formula 1 of the present invention.

[0063] Fluorescent sensor polymer P: dark yellow solid (400mg, 69%). 1 HNMR: (CDCl 3 ,400MHz), δ(ppm):0.0-2.0(m,20H),7.0-7.2(m,3H),7.4(d,1H,J=7.2HZ),6.0(d,3H,J=5.5HZ) ,7.6-7.9(m,2H).FT-IR(KBr):3060,2967,2921,2850,2198,1710,1600,1452,1414,1259,1103,1026,886,823,753,692,513cm -1 Calcdfor(C 58 h ...

Embodiment 2

[0064] Embodiment 2 A synthetic method of fluorescent sensing polymer P, comprising the following steps:

[0065] 2,5-dibromothiophene (210mg), polyphenylene vinylene polymer (378mg) and 2,7-dibromo-9,9-diphenylfluorene (438mg) were dissolved in anhydrous diisopropylamine (DIPA, 2.5mL) and anhydrous toluene (22mL), placed in a 50ml three-necked flask. Argon protection was passed through for 40 minutes, and PdCl was added 2 (PPh 3 ) 2 (21mg), PPh 3 (252mg) and CuI (63mg). 90 ° C reflux reaction for 36h. Then, according to the purification, the fluorescent sensor polymer P is obtained, and the structural formula is shown in Formula 1 of the present invention.

Embodiment 3

[0067] Preparation of electrospun PS-P film: fluorescent sensing polymer P (0.4 mg) (polymer in Example 1) and PS (0.4 g) were dissolved in 4 ml mixed solution (DMF:THF=3:1) , and stirred for 24 hours. Transfer the resulting solution to the syringe of the electrospinning device. Electrospinning was performed at 20 kV for an acceptance distance of 25 cm. The flow rate of the solution was 1mLH via a syringe pump -1 Control at a constant rate. Electrospun nanofibrous membranes (1.0 cm x 1.7 cm) were formed on glass slides, which were attached to metal plate collectors on aluminum plates. The electrospun nanofibrous membrane (20 μm) was oven dried at 30 °C for 10 h to remove residual organic solvent.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a double-layered electrostatic spinning film sensor for detecting nitryl explosives. The sensor comprises a double-layered film structure, the bottom layer of the sensor is a gelatin electrostatic spinning film (GEL), serves as a skeleton layer and is placed on the surface of a glass sheet, a top layer uses polystyrene as a carrier, and is blended with fluorescent sensing polymer to prepare the electrostatic spinning film (PS-P), and the layer serves as a sensing layer. The double-layered electrostatic spinning film has the advantages that gelatin has a large number of amino and hydroxyl groups, nitroaromatic compounds are enriched through hydrogen bond interaction between the nitroaromatic compounds and gelatin so that the nitroaromatic compounds are gathered on the PS-P sensing layer, and the effect of improving the quenching efficiency is achieved; and the double-layered electrostatic spinning film sensor acts in a porous skeleton below the PS-P layer, the gelatin layer can allow molecules of the nitroaromatic compounds to simultaneously diffuse on the top and the bottom of the PS-P layer, and then permeability of the PS-P layer is greatly improved.

Description

technical field [0001] The invention relates to a sensor, in particular to a double-layer electrospun film sensor for detecting nitro explosives and a preparation method thereof. Background technique [0002] Nitroaromatics such as 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT), picric acid (PA) etc. are all important explosive components, for the use and Transportation must be strictly managed, otherwise it will not only seriously affect social stability and national security, but also cause harm to human health because of its biological toxicity and potential carcinogenicity. Therefore, the detection of explosives has attracted great attention from all countries, and many countries have invested a lot of money in scientific research. The fluorescence sensing method has the characteristics of high sensitivity, many parameters that can be collected (such as fluorescence intensity, fluorescence spectrum shape, fluorescence anisotropy, fluorescence lifetime, etc.), fas...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
CPCG01N21/6428G01N2021/6432
Inventor 崔月芝王洁美李艳李天铎陶芙蓉
Owner QILU UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap