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Strontium ion responsive high polymer material, ion imprinted gel, gel grating, preparation methods of ion imprinting gel and gel grating, and strontium ion detection method

A polymer material and ion imprinting technology, applied in the field of strontium ion detection, can solve problems such as low detection accuracy, difficulty in popularization and application, and aggravated environmental burdens, and achieve the effects of improving specific recognition, favorable structure, and enriching species

Active Publication Date: 2021-07-27
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, organic dyes complexed with Sr 2+ The color change of is very weak, resulting in low detection accuracy of the method
[0004] In summary, the existing Sr 2+ The detection method still faces two major difficulties: on the one hand, the raw materials used for detection (such as pyrene, basic orange 2) have certain toxicity, and their application and recycling process will increase the environmental burden; on the other hand, the detection technology based on these materials is limited. It is difficult to collect signals, and it needs to rely on professional instruments in the laboratory, so it is difficult to popularize and apply in actual scenarios

Method used

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  • Strontium ion responsive high polymer material, ion imprinted gel, gel grating, preparation methods of ion imprinting gel and gel grating, and strontium ion detection method
  • Strontium ion responsive high polymer material, ion imprinted gel, gel grating, preparation methods of ion imprinting gel and gel grating, and strontium ion detection method
  • Strontium ion responsive high polymer material, ion imprinted gel, gel grating, preparation methods of ion imprinting gel and gel grating, and strontium ion detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] In this embodiment, according to figure 1 The route shown for the synthesis of Sr 2+ Responsive polymer material—poly(N-isopropylacrylamide-copolymerization-5′-O-acryloyl-2′, 3′-O-isopropylidene-guanosine) (PNG), its structural formula as follows:

[0071]

[0072] Here, b / (a+b)=0.05.

[0073] (1) Fully stir and mix monomer NIPAM, APG, initiator azobisisobutyronitrile (AIBN) and solvent A tetrahydrofuran (THF) until each component is fully dissolved, then pass nitrogen gas into the resulting mixed solution for 30 minutes while stirring In order to remove the oxygen in the mixture, it was quickly transferred to an airtight container and reacted in an oil bath at 70°C for 24h.

[0074] In this step, the molar ratio of NIPAM to AIBN is controlled to be 100:0.5, the molar weight of APG accounts for 5% of the sum of the molar weights of APG and NIPAM, and the concentration of NIPAM in the mixed solution is 0.4 mol / L.

[0075] (2) Purification

[0076] Concentrate the...

Embodiment 2

[0082] Sr 2+ The preparation method of the responsive polymer material (PNG) is basically the same as that of Example 1, except that in step (1), the molar ratio of NIPAM and AIBN is controlled to be 200:0.5, and the molar weight of APG accounts for the molar weight of APG and NIPAM. 3% of the sum of the amounts, the concentration of NIPAM in the mixture is 0.1mol / L.

Embodiment 3

[0084] Sr 2+ The preparation method of the responsive polymer material (PNG) is basically the same as in Example 1, except that in step (1), the molar ratio of NIPAM and AIBN is controlled to be 100:0.05, and the molar weight of APG accounts for the molar weight of APG and NIPAM. 11% of the sum of the amounts, the concentration of NIPAM in the mixed solution is 0.4mol / L.

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Abstract

The invention provides a Sr<2+> responsive high polymer material, an ion imprinted gel and a gel grating. The high polymer material is formed by copolymerization of N-isopropylacrylamide and 5'-O-acryloyl-2', 3'-O-isopropylidene-guanosine, and the ion imprinted gel is formed by A G-tetramer unit, formed by copolymerization of 5'-O-acryloyl-2 ' 3'-O-isopropylidene-guanosine under induction of Sr<2+>, and Sr<2+>-containing gel formed by copolymerization crosslinking of N-isopropylacrylamide after Sr<2+> in a gel network is fully eluted, and the gel grating is composed of a substrate and parallel gel strips on the substrate. Each gel strip is composed of the ion imprinted gel. The invention also provides a trace Sr<2+> detection method. The environmental protection property of the Sr<2+> detection material can be improved, the detection difficulty of the Sr<2+> detection material is reduced, and sensitive and convenient detection of trace Sr<2+> is realized.

Description

technical field [0001] The invention belongs to the field of strontium ion detection, and relates to a strontium ion responsive polymer material, an ion imprinted gel and a gel grating, their preparation methods, and a strontium ion detection method. Background technique [0002] Since nuclear technology was developed and applied, the issue of nuclear pollution has always been a hot spot for researchers. 90 Sr is a product of nuclear fission and one of the most dangerous nuclear wastes. As a radionuclide, its half-life is as long as 29 years, which poses a huge threat to human health and the ecological environment. exposed to 90 Sr environment, will increase the risk of human bone cancer and leukemia. Most strontium in nature exists in the form of strontium sulfate and strontium carbonate. Due to its unique physical and chemical properties, strontium compounds are widely used in the fields of color picture tube manufacturing, pyrotechnic flare production, electrolytic zi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/54C08F220/36C08F222/38G01N21/47
CPCC08F220/54G01N21/4788C08F220/36C08F222/385
Inventor 巨晓洁刘玉琼褚良银汪伟谢锐刘壮
Owner SICHUAN UNIV
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