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Preparation method of corrosive self-brittle radioactive detergent for iron-based material surface

A technology for iron-based materials and detergents, used in radioactive purification, nuclear engineering, etc., can solve the problems of poor acid and alkali corrosion resistance, large amount of secondary waste, self-brittle detergents corroding metal surfaces, etc. Acid resistance and less secondary waste

Active Publication Date: 2021-05-18
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Existing self-brittle detergents cannot be used to remove fixed radioactive pollutants on the surface of metal materials, and the removal efficiency is low
[0007] Moreover, organic substances such as P(MMA-co-MAA) and P(MMA-b-MAA) have poor acid and alkali corrosion resistance, and it is impossible to realize the function of self-brittle detergent to corrode the metal surface by adding acid and alkali and other corrosive components.
[0008] The existing methods for decontaminating radioactive contamination on metal surfaces have problems such as large amount of secondary waste, inability to operate remotely, and difficulty in post-processing.

Method used

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  • Preparation method of corrosive self-brittle radioactive detergent for iron-based material surface
  • Preparation method of corrosive self-brittle radioactive detergent for iron-based material surface
  • Preparation method of corrosive self-brittle radioactive detergent for iron-based material surface

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preparation example Construction

[0045] Such as figure 1 As shown, the preparation method of the corrosive self-brittle type radioactive detergent for the surface of iron-based materials according to the embodiment of the present invention, based on 100 parts of the synthetic compound self-brittle type radioactive detergent, comprises the following steps:

[0046] S101: Preparation method of composite self-brittle detergent: add a mixture of absolute ethanol and deionized water (volume ratio 3:1) into a polytetrafluoroethylene ball mill tank, then add 30nm silica, silane coupling Add agent KH550 and emulsifier, add ball-milled zirconium beads according to the mass ratio of ball-milled zirconium beads to silica 10:1, separate zirconium beads after ball-milling for 45-60min (400 rpm), and obtain a modified silica suspension. Add the synthesized random copolymer solution into the liquid, and use a high-speed emulsifier to shear and disperse for 3 to 5 minutes (10000 revolutions per minute) to obtain a composite ...

Embodiment 1

[0055] The resin synthesis that the embodiment of the present invention provides comprises:

[0056] 1) Preparation of monomer solution: Weigh 120.00 g of methyl methacrylate (MMA), 50.00 g of methacrylic acid (MAA), 15.90 g of trifluoroethyl methacrylate (TFEMA), and high-speed shear the MMA and MAA Mix evenly for later use, and place TFEMA in a beaker separately for later use.

[0057] 2) Preparation of initiator solution: Dissolve 1.95g of AIBN in 100mL of hot ethanol, and disperse by ultrasonic for later use.

[0058] 3) Synthesis of resin: Add 900mL of absolute ethanol to a 2000mL four-necked flask, stir in a water bath at 75°C, and simultaneously add methyl methacrylate and methacrylic acid to the four-necked flask dropwise with a constant pressure dropping funnel. Bulk solution and prepared initiator, control the dropping time at about 30 minutes, react for 3-4 hours after dropping, then add trifluoroethyl methacrylate at one time, react for 3-4 hours, and discharge af...

Embodiment 2

[0060] The preparation of the iron-based material surface corrosive self-brittle type radioactive detergent provided by the embodiments of the present invention includes:

[0061] 1) Preparation method of composite self-brittle detergent: add 100g of a mixture of absolute ethanol and deionized water (volume ratio: 3:1) to a polytetrafluoroethylene ball mill tank, then add 20g of 30nm silicon dioxide, 2g of Silane coupling agent KH550 and 5g emulsifier, add ball-milled zirconium beads according to the mass ratio of ball-milled zirconium beads to silica 10:1, separate zirconium beads after ball milling for 45-60min (400 rpm), and obtain modified silica suspension Add 10g of synthetic random copolymer solution to the suspension, and use a high-speed emulsifier to shear and disperse for 3 to 5 minutes (10,000 revolutions per minute) to obtain a composite self-brittle detergent.

[0062] 2) Preparation method of carbon steel surface corrosive self-brittle radioactive detergent: use...

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Abstract

The invention belongs to the technical field of radioactive decontamination, and discloses a preparation method of a corrosive self-brittle radioactive decontamination agent used on the surface of iron-based materials. Silicon dioxide is used as an inorganic component. modified silicon oxide; using methyl methacrylate, methacrylic acid, and trifluoroethyl methacrylate terpolymer as organic components, a composite self-brittle detergent was prepared through organic / inorganic compounding; and then It is compounded with corrosive components such as nitric acid to prepare a corrosive self-brittle radioactive detergent for carbon steel and stainless steel. The detergent of the present invention aims at strong fixed radioactive pollutants on the surface of iron-based metal materials, destroys the surface layer of iron-based metals through corrosive components, and the detergent absorbs and wraps the pollutants, and after drying and brittle, brittle chips are formed to peel off by themselves, thereby Realize the removal of radioactive pollutants on the surface of iron-based metals.

Description

technical field [0001] The invention belongs to the technical field of radioactive decontamination, and in particular relates to a method for preparing a corrosive self-brittle radioactive decontamination agent used on the surface of iron-based materials. Background technique [0002] Currently, the closest prior art: [0003] Compared with traditional energy sources such as coal and petroleum, nuclear energy has extremely high energy density. Nuclear fuel stores huge energy in a very small volume and can release it in a controlled manner. Therefore, it has been rapidly applied since its discovery. The use of nuclear energy began in the 1940s and 1950s, so there are currently a large number of nuclear facilities around the world that are decommissioning or preparing to decommission because they have reached the end of their service life. At the same time, the production, scientific research and technological transformation using nuclear energy are still in progress, thus pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21F9/00G21F9/28C23F1/28C08F220/14C08F220/06C08F220/24
CPCC08F220/14C23F1/28G21F9/001G21F9/28C08F220/06C08F220/24
Inventor 李银涛周元林何智宇李迎军刘星浩
Owner SOUTHWEAT UNIV OF SCI & TECH
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