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Method used for absorbing carbon dioxide with conjugated polymer and boron nitride composite material, and monitoring carbon dioxide slow release

A technology of conjugated polymers and composite materials, which is applied in the fields of environmental/food/medicine/biological testing and determination, and can solve the problems of increasing the cost of polymer preparation

Active Publication Date: 2019-06-18
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still some disadvantages in the processability of conjugated polymers, for example, in terms of structural modification, the introduction of carbon dioxide-responsive groups will increase the cost of polymer preparation

Method used

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  • Method used for absorbing carbon dioxide with conjugated polymer and boron nitride composite material, and monitoring carbon dioxide slow release
  • Method used for absorbing carbon dioxide with conjugated polymer and boron nitride composite material, and monitoring carbon dioxide slow release
  • Method used for absorbing carbon dioxide with conjugated polymer and boron nitride composite material, and monitoring carbon dioxide slow release

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Example 1, detection of conjugated polymer and boron nitride composite material with different concentrations of CO 2 Fluorescence spectrum of action

[0069] (a) Production of CO in the environment of ice-water mixture 2 Saturated aqueous solution: continuous feeding of pure CO in ultrapure water 2 Gas more than 30min, get saturated CO 2 aqueous solution, at this time CO 2 The concentration is 74.94mM;

[0070] (b) will saturate CO 2 The aqueous solution and ultrapure water are mixed in different proportions to prepare a series of 2 Concentration standard solutions (0mM, 0.15mM, 0.30mM, 0.45mM, 0.60mM, 0.75mM, 0.90mM, 1.50mM, 3.00mM);

[0071] (c) 10.0 μL PFBT (0.5 mg / mL) and 5.0 μL BN (1.0 mg / mL) were added to 485 μL of different concentrations of CO in step (b) 2 in solution;

[0072] (d) measure the fluorescence spectrum of the sample of step (c) with a fluorescence spectrophotometer or a multifunctional microplate reader, the excitation wavelength is 380nm;...

Embodiment 2

[0074] Embodiment 2, different CO 2 Concentration and polymer PFBT exist and do not exist the fluorescence intensity FRET ratio of boron nitride (I531nm / I 418nm ) relationship comparison chart

[0075] According to the fluorescence spectrum that step (d) obtains in embodiment 1, calculate the fluorescence intensity ratio (abbreviated as (I) at 531nm and 418nm 531nm / I 418nm )), the larger the ratio, the larger the fluorescence resonance energy transfer of the polymer PFBT, and the more obvious the quenching occurs.

[0076] figure 2 for CO 2 Comparison plot of concentration versus FRET ratio for polymeric PFBT in the presence and absence of boron nitride.

[0077] Depend on figure 2 It can be seen that the larger the FRET ratio, the greater the CO 2 The higher the concentration. Compared with the presence and absence of boron nitride, the FRET ratio decreased, indicating that some of the CO 2 Adsorbed by the composite material.

Embodiment 3

[0078] Example 3. Stimuli-responsive conjugated polymer and boron nitride composite material detecting the fluorescence spectrum and FRET ratio of slowly releasing carbon dioxide versus time

[0079] The carbon dioxide concentration is 0.75mM, the volume of the aqueous solution of the conjugated polymer: the volume of the boron nitride dispersion liquid: CO 2 Volume of aqueous solution = 10.0 μL: 5.0 μL: 485 μL.

[0080] image 3 It is a relationship diagram of the fluorescence FRET ratio of slowly releasing carbon dioxide measured in Example 3 of the present invention for the stimuli-responsive conjugated polymer and boron nitride composite material as a function of time.

[0081] image 3 a is the fluorescence emission spectrum of the polymer without boron nitride as a function of incubation time, image 3 b is the fluorescence emission spectrum of the composite of polymer and boron nitride as a function of incubation time,

[0082] image 3 c is to calculate image 3 ...

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Abstract

The invention provides a method used for absorbing carbon dioxide with a conjugated polymer and boron nitride composite material, and monitoring carbon dioxide slow release. The structure of the conjugated polymer is represented by formula I. The method is invented based on fluorescence resonance energy transfer (FRET) technology of carbon dioxide on the stimuli-responsive conjugated polymer and adsorption performance of boron nitride on carbon dioxide, so that the composite material is provided with double functions, and adsorption and slow release of the composite material on CO2 are detected; and at the same time, the process is capable of promoting further assembling of the stimuli-responsive conjugated polymer and boron nitride through hydrophobic effect and electrostatic interaction,a supermolecular polymer system is formed, and carbon dioxide is adopted to regulate the aggregation state or conformation of the conjugated polymer and boron nitride.

Description

technical field [0001] The invention belongs to the fields of environmental / food / medicine / biological testing and measurement technology and chemical sensing / analysis, and specifically relates to a method for using conjugated polymers and boron nitride composite materials to absorb carbon dioxide and monitor its slow release. Background technique [0002] carbon dioxide (CO 2 ) as a common gas has very important significance for various life activities. Atmospheric CO 2 It is the main carbon source available to living organisms on the earth as the carbon cycle, and its content in the atmosphere is mainly regulated by photosynthesis of organisms such as plants and algae and natural geological phenomena such as volcanoes. CO 2 It is the most important greenhouse gas in the earth's atmosphere. With the rapid development of human society in modern times, CO 2 Emissions are gradually increasing - mainly from the combustion of fossil fuels and vehicle exhaust emissions - CO in ...

Claims

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Application Information

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IPC IPC(8): B01J20/292G01N21/64C09K11/06
Inventor 邢成芬王波高冬展永
Owner HEBEI UNIV OF TECH
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