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A kind of antifouling type oxygen sensitive film and its preparation method and application

A sensitive film and antifouling technology, applied in the field of materials, can solve the problems of shortening the service life of oxygen sensitive film, affecting sensitivity and accuracy, and pollution of oxygen sensitive film, so as to improve the anti-pollution ability and ensure the effect of sensitivity.

Active Publication Date: 2022-03-25
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some progress has been made in the development of oxygen-sensitive membranes in the past few decades, in practical applications, the detection objects (such as water bodies) are mostly complicated, and some algae or other pollutants may cause damage to oxygen-sensitive membranes. Pollution will not only affect the sensitivity and accuracy of the measurement, but also greatly shorten the service life of the oxygen-sensitive membrane, resulting in the need for frequent calibration and replacement of the oxygen-sensitive membrane during actual use, which will increase the workload of on-site maintenance of the instrument and the cost of measurement. greatly increase

Method used

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  • A kind of antifouling type oxygen sensitive film and its preparation method and application
  • A kind of antifouling type oxygen sensitive film and its preparation method and application
  • A kind of antifouling type oxygen sensitive film and its preparation method and application

Examples

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Effect test

Embodiment 1

[0051] In a 100ml flask, add PDMS (R 1 , R 2 H, Mw is 1000) and TEOS, stirred at reflux temperature and continuous nitrogen flow for 8h; then added PEG (R 3 C=1 alkyl), at the reflux temperature, continue to stir with nitrogen for 8h; finally add platinum porphyrin (concentration is 1.0×10 -4 mol / L), stirred evenly, spread on a glass slide (2.5cm×0.8cm×0.1cm) that had been cleaned and dried with NaOH and ethanol, and cured at room temperature for 48h to obtain an oxygen-sensitive film, marked as 1 number film.

Embodiment 2

[0053] In a 100ml flask, add PDMS (R 1 for H, R 2 OH, Mw is 1000) and TEOS, stirred at reflux temperature and continuous nitrogen flow for 8h; then added PEG (R 3 C=1 alkyl), at the reflux temperature, continue to stir with nitrogen for 8h; finally add platinum porphyrin (concentration is 1.0×10 - 4 mol / L), stirred evenly, spread on a glass slide (2.5cm×0.8cm×0.1cm) that had been cleaned and dried with NaOH and ethanol, and cured at room temperature for 48 hours to obtain an oxygen-sensitive film, marked as 2 number film.

Embodiment 3

[0055] In a 100ml flask, add PDMS (R 1 , R 2 OH, Mw is 1000) and TEOS, stirred at reflux temperature and continuous nitrogen flow for 8h; then added PEG (R 3 C=1 alkyl), at the reflux temperature, continue to stir with nitrogen for 8h; finally add platinum porphyrin (concentration is 1.0×10 - 4 mol / L), stirred evenly and coated on a glass slide (2.5cm×0.8cm×0.1cm) that had been cleaned and dried with NaOH and ethanol, and cured at room temperature for 48 hours to obtain an oxygen-sensitive film, marked as 3 number film.

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Abstract

The invention discloses an antifouling oxygen-sensitive membrane, a preparation method and application thereof, and belongs to the field of materials. In the invention, the siloxane film substrate is modified by PEG, and then the oxygen sensitive agent is mixed to prepare the antifouling oxygen sensitive film. The anti-fouling oxygen sensitive film obtained by the method of the present invention has good anti-pollution properties, and ensures a more sensitive response to molecular oxygen, which can greatly increase the service life of the dissolved oxygen sensor, reduce the detection cost, and make the optical dissolved oxygen sensor The application is more extensive, economical and reliable.

Description

technical field [0001] The invention relates to an antifouling oxygen-sensitive membrane, a preparation method and application thereof, and belongs to the field of materials. Background technique [0002] The content of dissolved oxygen concentration in water is an important index to evaluate the water quality environment, and it is also an essential living condition for aquatic organisms. There are many methods for the determination of dissolved oxygen, mainly including iodometric method, electrochemical method, spectrophotometric method and fluorescence analysis method. Among them, although the iodometric method is more accurate in measurement, the procedure is too cumbersome, the consumption time is too long, and online analysis cannot be performed. Although the electrochemical method realizes on-line detection, the oxygen in the sample will be continuously consumed during the measurement process, and the sample must be stirred continuously. The spectrophotometric metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
CPCG01N21/643G01N2021/6432
Inventor 朱振中张松林
Owner JIANGNAN UNIV