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Interfacial nanofibril composites for selective alkane vapor detection

A nanofiber, alkane technology, applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of complex operation, slow speed and high cost

Active Publication Date: 2021-01-22
UNIV OF UTAH RES FOUND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current technologies still face great challenges in alkane vapor detection, especially trace level sensitivity and real-time monitoring
Traditional spectroscopic methods, such as gas chromatography-mass spectrometry (GC-MS) and ion mobility spectrometry (IMS), are slow, costly and complex
The chemical inertness of alkanes limits the effectiveness of sensing techniques based on direct chemical reactions or interactions, such as electrochemistry, reaction-based fluorescence, and chemiresistors

Method used

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  • Interfacial nanofibril composites for selective alkane vapor detection
  • Interfacial nanofibril composites for selective alkane vapor detection
  • Interfacial nanofibril composites for selective alkane vapor detection

Examples

Experimental program
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Embodiment

[0092] Fabrication of PTCDI, ACTC nanofibers and ACTC / PTCDI nanofibril composites .

[0093] ACTC nanofibers, PTCDI nanofibers and ACTC / PTCDI composites were fabricated using a solution-based method. For single-component nanostructures, 0.1 mM chloroform solutions of the building block molecules were prepared. For the ACTC / PTCDI complex, the concentration ratio of ACTC and PTCDI was equal to their required molar ratio, and the total concentration in chloroform solution was fixed at 0.2 mM. Quickly add 1 mL of the prepared solution to 9 mL of ethanol at room temperature while shaking. Then, the supersaturated solution was kept at 4°C for 12 hours. Some reddish (for PTCDI and ACTC / PTCDI) and pale white (for ACTC) aggregates formed at the bottom of the tube. Carefully remove the top clear solution (about 9 mL) from the tube, leaving about 1 mL of solvent for the sample. Shake the remaining material to form a quasi-homogeneous mixture ready for transfer to a substrate or elect...

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Abstract

The present invention discloses a nanofiber composite sensor (100) for detecting alkanes, which may include a network of contacting nanofibers with multiple contact points. Each point of contact can form an interfiber interface of interdigitated alkyl chains (112, 122). Alkanes may be adsorbed at the interfiber interface, which results in increased interfiber distance between the first nanofiber (110) and second nanofiber (120) and decreased charge transfer efficiency. The alkanes detected can be in the gas or liquid phase.

Description

[0001] government interest [0002] This invention was made with government support under Grant No. 2009-ST-108-LR0005 awarded by the U.S. Department of Homeland Security, Grant No. CHE0931466 awarded by the National Science Foundation, and Grant No. NNX12AM67H awarded by NASA. The government has certain rights in this invention. technical field [0003] The present invention relates to the field of vapor or gas detection using specific nanomaterials. Accordingly, the present invention relates to the fields of organic chemistry, chemical engineering and nanotechnology. Background technique [0004] As the most common products of fossil fuels, alkanes are the main components of motor oil and the main energy source of modern society. They are also important industrial raw materials and solvents. While serving people, the widespread use of alkanes poses risks to safety, the environment and health. Alkanes are flammable and their vapors are highly explosive when mixed with o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00G01N27/12
CPCG01N27/127G01N27/305G01N33/0057G01N27/128G01N27/126G01N33/0031
Inventor 王辰L·臧B·布纳
Owner UNIV OF UTAH RES FOUND