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Plastic scintillator sheet, preparation method and preparation device thereof

A plastic scintillator and preparation device technology, which is applied in the field of nuclear radiation detection material preparation, can solve the problems of small size, poor thickness uniformity, and poor detection efficiency consistency, and achieve stable performance, good thickness uniformity, and high luminous output. Effect

Pending Publication Date: 2021-05-04
苏州昊唐兴核高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the size is small and the thickness uniformity is poor; the plastic scintillator sheet produced by the extrusion process is limited by the size of the mold, and the size of the extruded plastic scintillator sheet is small
The consistency of detection efficiency is poor; due to the small amount of luminescent agent and wave shifting agent added, it is difficult to fully and uniformly mix with styrene particles, so the detection efficiency of radioactive rays at different positions on the extruded plastic scintillator sheet is relatively low. Difference

Method used

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  • Plastic scintillator sheet, preparation method and preparation device thereof
  • Plastic scintillator sheet, preparation method and preparation device thereof
  • Plastic scintillator sheet, preparation method and preparation device thereof

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preparation example Construction

[0045] The present invention prepares the preparation method of this plastic scintillator sheet, and this preparation method comprises the following steps:

[0046] S1 Assemble and clean the preparation device, assemble the preparation device to form a reaction kettle; and clean the preparation device according to the following sequence, acetone solution cleaning → pure water cleaning → acetone solution cleaning → three times of pure water cleaning, and then dry the preparation device with nitrogen;

[0047] S2 Preparation device test, pressure-resistant and airtight test of the preparation device, the leakage of the airtight value is less than 0.15ml / min, and the pressure P value is 0.5MPa≤P≤0.8MPa;

[0048] S3 Purify the preparation device, put the preparation device into the heating furnace, and pass nitrogen gas into the preparation device for 3 to 5 cycles to replace the air in the preparation device and the reaction kettle, so that a nitrogen environment is formed in the ...

Embodiment 1

[0064] Prepare 10 pieces of plastic scintillator sheets with a thickness of 0.5 mm. The base material of the plastic scintillator sheets is styrene, luminescent agent p-terphenyl 3% and wave-shifting agent 1,4-bis(5-phenyloxazole)benzene 0.8 %.

[0065] Table 1 prepares 10 plastic scintillator sheet samples, refer to Figure 8 Test multiple points to obtain the average thickness (mm)

[0066] 1 2 3 4 5 6 7 8 9 10 0.503 0.508 0.509 0.493 0.502 0.490 0.507 0.501 0.495 0.511

Embodiment 2

[0068] Prepare 10 plastic scintillator sheets with a thickness of 0.35 mm. The base material of the plastic scintillator sheets is methyl methacrylate, and the luminescent agent is 5% of 2-(4-biphenyl)-5-phenyloxadiazole and Wave agent is 0.6% of 9,10-diphenylanthracene.

[0069] Table 2 prepares 10 plastic scintillator sheet samples, refer to Figure 8 Test multiple points to obtain the average thickness (mm)

[0070] 1 2 3 4 5 6 7 8 9 10 0.353 0.358 0.349 0.353 0.352 0.350 0.347 0.351 0.345 0.351

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Abstract

The invention provides a plastic scintillator sheet. The plastic scintillator sheet is composed of a base material, a luminescence agent and a wave shifter. The preparation method comprises the following steps: S1, preparation device assembling and cleaning, S2, preparation device testing, S3, preparation device purification, S4, scintillator solution preparation, S5, scintillator solution reaction preparation, S6, scintillator solution polymerization reaction, and S7, destressing of the scintillator sheet. The preparation device comprises a detachable reaction kettle; the reaction kettle comprises a frame, a lower cover plate and an upper cover plate; forming plates are arranged in the reaction kettle, and forming cavities are formed between the forming plates and used for forming plastic scintillator sheets. According to the preparation method, a polymerization process is used, the large-size plastic scintillator sheet is prepared as required, and the relative thickness deviation is small; and the plastic scintillator base, the luminescence agent and the wave shifter are fully and uniformly mixed and reacted, and the high detection efficiency and consistency of the plastic scintillator sheet to rays at different positions are ensured.

Description

technical field [0001] The invention relates to the technical field of preparation of nuclear radiation detection materials, in particular to a plastic scintillator sheet, a preparation method of the sheet and a preparation device thereof. Background technique [0002] In nuclear detection technology, plastic scintillators are an important member of scintillators, and play an important role in the measurement of charged particles, neutrons and other ray particles. Plastic scintillators are usually composed of a plastic matrix, a first luminescent substance and a second luminescent substance. When particles or rays enter the plastic scintillator and are absorbed by the plastic matrix, the generated electron and hole pairs will excite the first luminescent substance. , and produce luminescence, but the luminescent wavelength is located in the ultraviolet region and is easily absorbed by the plastic matrix and cannot be emitted. Therefore, a second luminescent substance, also k...

Claims

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Application Information

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IPC IPC(8): C08F112/08C08F120/14C08F212/12C08F220/14C08F2/44C08F2/01C08K5/01C08K5/353C08J5/18C08L25/14C08L33/12C08L25/16
CPCC08F112/08C08F120/14C08F212/12C08F220/14C08F2/44C08F2/01C08K5/01C08K5/353C08J5/18C08J2325/14C08J2333/12C08J2325/16
Inventor 潘子文王齐魏伟
Owner 苏州昊唐兴核高新材料有限公司
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