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Polyacrylic acid metal salt/boron oxide material as well as preparation method and application thereof

A polyacrylic acid, boron oxide technology, applied in the field of polymer materials, can solve the problems of harsh preparation conditions, difficult to uniformly disperse functional particles, single radiation shielding performance of materials, etc., and achieves simple preparation methods, lightweight materials, and simple preparation processes. Effect

Active Publication Date: 2015-01-14
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Technical problem: The purpose of the present invention is to overcome the disadvantages of harsh preparation conditions of traditional polyacrylic acid materials, the difficulty of uniformly dispersing the added functional particles, and the single radiation shielding performance of the prepared material, and provide a polyacrylic acid metal salt / boron oxide composite material and Its preparation method and application

Method used

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  • Polyacrylic acid metal salt/boron oxide material as well as preparation method and application thereof
  • Polyacrylic acid metal salt/boron oxide material as well as preparation method and application thereof
  • Polyacrylic acid metal salt/boron oxide material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: prepare lead acrylate, its preparation steps are:

[0043] Add 20mL of absolute ethanol and 6.2mL of acrylic acid into a 50mL three-neck flask, stir at 65°C, then add 8.93g of lead oxide in batches (the molar ratio of HAA to PbO is 2:1, with a slight excess of HAA), raise the temperature to 75°C, and heat to reflux Until the yellow lead oxide is completely dissolved, filter while it is hot, and the filtrate is cooled and crystallized. The obtained solid was filtered with suction and dried at 80° C. to a constant weight to obtain a white lead acrylate solid with a yield of 12.84 g and a yield of 92%.

Embodiment 2

[0044] Embodiment 2: prepare gadolinium acrylate, its preparation steps are:

[0045] Use a graduated cylinder to measure 24 mL of concentrated HCl into a 250 mL beaker, add 50 mL of deionized water to dilute for use. Weigh 14gGd 2 o 3 , heated the beaker containing hydrochloric acid to about 50°C while stirring, and weighed Gd 2 o 3 Slowly add to the beaker in batches, stir until the solution is colorless and transparent, turn off the heating, and filter the solution to remove insoluble impurities. Aqueous ammonia was then slowly added, and a large amount of precipitation gradually appeared, and the pH was adjusted to 8. Suction filtration (centrifugation) of the product, washing and suction filtration (centrifugation), repeat this 2-3 times until there is no ammonia smell, and dry the precipitate at 110°C to constant weight to obtain block Gd(OH) 3 . The mass of the obtained product was 15.35 g, and the yield was 96%.

[0046] Gd(AA) 3 The synthesis according to the ...

Embodiment 3

[0047] Embodiment 3: prepare the polyacrylic acid metal salt / boron oxide composite material (sample 1) that contains lead acrylate 15%, gadolinium acrylate 15%, acrylic acid 25%, boron oxide 30% (sample 1), and its preparation steps are:

[0048] Weigh 30g of lead acrylate, 30g of gadolinium acrylate, and 60g of boron oxide in a beaker, add 50g of acrylic acid and 22mL of deionized water, stir to dissolve completely, add 8g of benzoin dimethyl ether and mix well. Pour the mixed solution into a polytetrafluoroethylene mold with a length, width, and height of 10cm×10cm×2cm, and then irradiate the mold with 200-400nm ultraviolet light for 150 minutes to obtain a layered polymer material. The obtained layered material was placed in a mold with a length, width, and height of 10cm×10cm×5cm, and molded at 100°C and a pressure of 10MPa to obtain a lead acrylate: gadolinium acrylate: boron oxide mass ratio of 1:1:2. Polyacrylic acid metal salt / boron oxide composite.

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Abstract

The invention discloses a polyacrylic acid metal salt / boron oxide material as well as a preparation method and application thereof. The material is obtained by mixing lead acrylate, gadolinium acrylate, acrylic acid, deionized water, boron oxide and benzoin dimethyl ether serving as a photoinitiator, preparing by virtue of an ultraviolet light-induced crosslinking method at room temperature and then molding by virtue of a mold-pressing method. The composite material disclosed by the invention can be used for radiation shielding and thus gamma ray irradiation can be effectively shielded and thermal neutrons can be absorbed. Since the ultraviolet light-induced crosslinking is directly carried out by virtue of in-situ polymerization and multi-network cross-compounding of ionic and covalent bonds is performed, the prepared material is dense and lightweight, is simple in process and low in cost and has good radiation shielding effect.

Description

technical field [0001] The invention relates to a polymer material, in particular to a polyacrylic acid metal salt / boron oxide composite material, a preparation method and an application thereof. Background technique [0002] Ionizing radiation has been widely used in many fields of contemporary science and technology. While enjoying the convenience, human beings also attach great importance to the protection of radiation. As far as the biological effects and hazards of radiation are concerned, the purpose of radiation protection is to protect individuals, their offspring and all human beings, and to allow necessary activities that may cause radiation exposure, so the purpose of radiation protection is to prevent Harmful nonrandom effects, and limit the incidence of random effects to acceptable levels. Therefore, the development, production and popularization of radiation protection equipment is the focus of routine civilian health protection work, and it is also an importa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F2/48C08K3/38B29C43/58G21F1/02
Inventor 杨洪汪趁时林保平
Owner SOUTHEAST UNIV
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