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Low-temperature water-soluble sealing film and preparation and application thereof

A sealing film, water-soluble technology, applied in the direction of coating, can solve the problem of sealing film aging and falling off, and achieve the effect of lowering glass transition temperature, preventing hardening and embrittlement, good film-forming performance and mechanical strength

Inactive Publication Date: 2019-05-24
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to propose a low-temperature water-soluble sealing film and its preparation and application in view of the existing problems of radioactive contamination metal sealing film
The sealing film of the present invention can solve the serious problem of aging and falling off of the existing sealing film, has a good sealing effect, can be quickly dissolved in cold water at 5-10°C, has a simple process, and produces less waste

Method used

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  • Low-temperature water-soluble sealing film and preparation and application thereof
  • Low-temperature water-soluble sealing film and preparation and application thereof
  • Low-temperature water-soluble sealing film and preparation and application thereof

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Embodiment 1

[0024] The preparation process of the low-temperature water-soluble sealing membrane of this embodiment is as follows:

[0025] 1. Preparation of PVA solution

[0026] Slowly add 10g of PVA to 100ml of water under stirring to make it fully swell, disperse and release volatile substances in the water; then raise the temperature to 85°C to accelerate the dissolution, and keep it warm until the solution no longer contains tiny particles, and a homogeneous PVA is obtained solution.

[0027] 2. Preparation of viscous solution

[0028] Add 0.17g of acrylamide to the PVA solution prepared above, stir evenly to produce small bubbles, add 5.5ml of TBP, stir, then add 0.3ml of sodium hydroxide solution with a concentration of 25%, 0.05ml of glycerol and 0.11g of surface active agent to obtain a viscous solution.

[0029] 3. Preparation of water-soluble blocking membrane

[0030] Apply the resulting viscous solution to a tin plate, make it into a film and fully dry it at 25°C for 2 h...

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Abstract

The invention provides a low-temperature water-soluble sealing film, and belongs to the technical field of decontamination of radioactive polluted metal surfaces. The sealing film comprises the following components in parts by mass: 91.0-102.5 parts of a base material, 1.5-2.0 parts of a plasticizer and 0.5-1.0 part of a surfactant, wherein the base material is a mixture of polyvinyl alcohol (PVA), acrylamide and sodium hydroxide; the plasticizer is glycerol; the surfactant is sodium dodecyl sulfate. The invention also provides a preparation method and application of the low-temperature water-soluble sealing film. The water-soluble sealing film provided by the invention can be quickly dissolved even in cold water at the temperature of between 5 and 10 DEG C, the film making process is simple, the operation is simple and convenient, the waste generation amount is small, the water-soluble sealing film is an extremely simple and easy sealing film capable of preventing radioactive pollution on the metal surface, the random diffusion of radioactive aerosols attached to the metal surface can be effectively avoided, and a new technical means is provided for the decontamination treatment of the radioactive pollution on the metal surface in the nuclear facility decommissioning engineering.

Description

technical field [0001] The invention belongs to the technical field of decontamination of radioactively polluted metal surfaces, in particular to a low-temperature water-soluble sealing film and its preparation and application. Background technique [0002] During the decommissioning of nuclear facilities, a large number of radioactively contaminated metal facilities and components will be produced. Some of the contaminated metals can be cleaned and released by wiping and decontamination with peelable film, but there are still some contaminated metals, especially contaminated metal pipes and glove boxes, which cannot be decontaminated on site to the clean and released level. It needs to be decontaminated by mechanical grinding, electrolytic decontamination or relocation. [0003] During the subsequent treatment or relocation of radioactively contaminated metals, the spread of radioactive contamination must be prevented. In order to prevent the spread of radioactive aerosol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/06C09D4/02C09D5/20C09D7/61C09D7/63C09D7/65
Inventor 杨爱丽杨鹏王东文田青青张峰
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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