Plastic scintillator microsphere, preparation method and application

A technology for plastic scintillators and microspheres, which is applied in the preparation of microspheres, microcapsule preparations, instruments, etc., can solve the problems of limited application of liquid scintillation instruments, difficulties in waste liquid treatment and wastewater treatment centers, etc., and achieve good physical and chemical stability. high quality, low cost of raw materials, and a wide range of effects

Pending Publication Date: 2021-11-19
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of liquid scintillation meter in continuous measurement and high salinity measurement is limited
In addition, the use of liquid flash will produce a lot of organic radioactive waste liquid, and the treatment of these waste liquids also brings difficulties to the wastewater treatment center

Method used

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  • Plastic scintillator microsphere, preparation method and application
  • Plastic scintillator microsphere, preparation method and application
  • Plastic scintillator microsphere, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Put 100 mL of styrene into the separatory funnel, then add 100 mL of 5 mol / L NaOH solution, shake well, let stand for ten minutes, and release the lower aqueous phase. Repeat adding 100 ml of NaOH to wash twice, the upper liquid was distilled under reduced pressure at 75°C, and the colorless transparent distillate was collected as refined styrene solution.

[0026] Take 50 mL of styrene solution, add 1.00% PPO, 0.01% POPOP and 0.5% azobisisobutyronitrile, dissolve and shake well, store in the refrigerator for later use.

[0027] Take 1 L of deionized water, add 5 g of polyvinyl alcohol, stir to dissolve and set aside.

[0028] Take 10 mL of polyvinyl alcohol solution, add 140 mL of deionized water, add 5 mL of styrene solution, slowly raise the temperature to 82 °C, and keep it for 2 h. Then the temperature was raised to 90°C for 30 min to stop the reaction. The product was poured into a 500 mL beaker, washed several times with 80°C warm water, then washed with ethano...

Embodiment 2

[0030] Take 50 mL of vinyltoluene solution, add 1.00% PPO, 0.01% POPOP and 0.5% azobisisobutyronitrile, dissolve and shake well, store in the refrigerator for later use.

[0031] Take 1 L of deionized water, add 5 g of polyvinyl alcohol, stir to dissolve and set aside.

[0032] Take 10 mL of polyvinyl alcohol solution, add 140 mL of deionized water, add 5 mL of styrene solution, slowly raise the temperature to 82 °C, and keep it for 2 h. Then the temperature was raised to 90°C for 30 min to stop the reaction. The product was poured into a 500 mL beaker, washed several times with 80°C warm water, then washed with ethanol, filtered, and dried to obtain the product.

Embodiment 3

[0034] Put 100 mL of styrene into the separatory funnel, then add 100 mL of 5 mol / L NaOH solution, shake well, let stand for ten minutes, and release the lower aqueous phase. Repeat adding 100 ml of NaOH to wash twice, the upper liquid was distilled under reduced pressure at 75°C, and the colorless and transparent distillate was collected as refined styrene solution.

[0035] Take 50 mL of refined styrene solution, add 1.00% PPO, 0.01% POPOP and 1.0% azobisisobutyronitrile, dissolve and shake well, and store in the refrigerator for later use.

[0036] Take 1 L of deionized water, add 5 g of polyvinyl alcohol, stir to dissolve and set aside.

[0037] Take 10 mL of polyvinyl alcohol solution, add 140 mL of deionized water, add 5 mL of styrene solution, slowly raise the temperature to 82 °C, and keep it for 2 h. Then the temperature was raised to 90°C for 30 min to stop the reaction. The product was poured into a 500 mL beaker, washed several times with 80°C warm water, then wa...

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Abstract

The invention discloses a plastic scintillator microsphere applicable to the field of nuclear detection, and a preparation method and application thereof. The scintillator resin components comprise a matrix material, a scintillating substance and a wave shifter, the particle size of the plastic scintillator microsphere is smaller than or equal to 1mm, and more specifically, the matrix material of the plastic scintillator microsphere is formed by polymerizing an unsaturated matrix monomer containing an active group, and the matrix monomer is styrene or vinyl toluene. The scintillating substance is 2, 5-diphenyl oxazole, and the wave shifter is 1, 4-bis (5-phenyl oxazole) benzene or-bis-(sigma-methyl styryl) benzene. The microspheres disclosed by the invention have very good physical and chemical stability, and have the advantages of low raw material price, wide raw material source, simple and convenient preparation method and the like. The plastic scintillator provided by the invention can be applied to continuous monitoring of radioactivity of a solution, or can be applied to preparation of a liquid scintillation spectrometer.

Description

technical field [0001] The invention relates to a plastic scintillator microsphere used in the field of nuclear detection, a preparation method and application. Background technique [0002] The "China Nuclear Energy Development Report (2020)" issued by the China Nuclear Energy Industry Association predicts that the positioning of nuclear energy in my country's clean energy and low-carbon system will become more clear, and its role will become more prominent. The construction of nuclear power is expected to continue steadily at an annual rate of 6 to 8 units. With the development of nuclear power, the demand for uranium resources is increasing. In the nuclear fuel cycle process such as uranium ore exploration and mining, refining and chemical conversion, enrichment and fuel assembly manufacturing, fuel assembly use, and radioactive waste treatment, the nuclear industry Practitioners will be exposed to occupational hazards of uranium aerosols, and uranium waste residues will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/167G01T1/204C08F112/08C08F112/12C08F2/44C08K5/353B01J13/14
CPCG01T1/167G01T1/204C08F112/08C08F112/12C08F2/44C08K5/353B01J13/14C08K2201/014
Inventor 刘同环史克亮董天浩周云马佳驹何建刚杨军强倪旭峰张伟波
Owner LANZHOU UNIVERSITY
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