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A kind of grafted polysilane scintillator and its preparation method

A scintillator and polysilane technology, applied in the fields of advanced nuclear technology application and environmental protection research, can solve the problems of poor durability and environmental applicability of plastic scintillators, and achieve excellent mechanical and processing performance, good chemical stability, and excellent flexibility. and malleable effects

Active Publication Date: 2022-02-18
合肥盖特环保技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a grafted polysilane scintillator and its preparation method, which is used to solve the technical problems of poor durability and environmental applicability of existing plastic scintillators

Method used

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  • A kind of grafted polysilane scintillator and its preparation method
  • A kind of grafted polysilane scintillator and its preparation method
  • A kind of grafted polysilane scintillator and its preparation method

Examples

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Effect test

Embodiment 1

[0060] A grafted polysilane scintillator PPO-PMS, the chemical structure of the scintillator is represented by Formula I:

[0061]

[0062] Among them, L 1 The structural formula is Its graft substitution rate x is 0.32, L 2 The graft substitution rate y is 0, and the degree of polymerization n is 18-23.

[0063] The preparation method of grafted polysilane scintillator PPO-PMS comprises the following steps:

[0064] S1, drying raw materials polymethylsilane (PMS) and p-phenylphenol;

[0065] Specifically, polymethylsilane (PMS) and p-phenylphenol are used as raw materials, and the drying of PMS adopts the sodium reflux method in toluene solvent; the solvent anhydrous tetrahydrofuran is prepared by sodium reflux method; the synthetic reagents and other solvents used are Molecular sieve drying, residual moisture <20ppm.

[0066] S2, grafting p-phenylphenol onto the polymethylsilane (PMS) molecular chain through Si-H nucleophilic substitution reaction;

[0067] Specif...

Embodiment 2

[0083] A grafted polysilane scintillator POPOP-PMS, the POPOP scintillation group is directly connected to the Si-Si main chain, and the chemical structure of the scintillator is represented by Formula I:

[0084]

[0085] Among them, L 1 The graft substitution rate x is 0, L 2 The structural formula is The graft substitution ratio y is 0.12, and the degree of polymerization n is 18-23. Its specific synthesis process is as follows:

[0086] S1. Raw material preparation

[0087] Using polymethylsilane (PMS) and 1-(5-phenyl-2-oxazolyl)-4-(5-(4-bromophenyl)-2-oxazolyl)benzene as raw materials; drying of PMS The sodium reflux method is adopted in the toluene solvent; the solvent anhydrous tetrahydrofuran is prepared by the sodium reflux method; the synthetic reagents and other solvents used are Molecular sieve drying, residual moisture <20ppm.

[0088] S2, grafting reaction

[0089] The chemical structure in which the scintillation group is directly connected to the Si-S...

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Abstract

The invention relates to a grafted polysilane scintillator and a preparation method thereof, belonging to the technical fields of advanced nuclear technology application and environmental protection. By using polymethylsilane (PMS) and reagents containing scintillation groups as raw materials, the reactants containing scintillation groups are grafted onto the molecular chain of polymethylsilane (PMS), and the polysilane scintillator prepared has both The advantages of organic crystal scintillators and plastic scintillators have strong degradation resistance under high temperature and radiation conditions, and stronger environmental adaptability.

Description

technical field [0001] The invention relates to a grafted polysilane scintillator and a preparation method thereof, belonging to the fields of advanced nuclear technology application and environmental protection research. Background technique [0002] As a radioactive isotope of hydrogen, tritium mainly comes from nuclear facilities such as heavy water reactors, fusion reactors, tritium process research facilities, fuel reprocessing plants, etc. Its most important use is to perform fusion reactions with deuterium. , tritium-labeled compounds are essential research tools. However, since tritium is radioactive and is easily absorbed by organisms, if it leaks into the environment, it will cause harm to human health, so the environmental monitoring of tritium has attracted more and more attention. Surfaces such as instruments, floors, walls, and work clothes in factories that produce, operate, and store tritium, as well as experimental sites, all need to monitor tritium polluti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/388G01T1/202
CPCC08G77/388C08G77/38G01T1/2023
Inventor 浦文婧芦伟宋佑新
Owner 合肥盖特环保技术有限责任公司