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A kind of anti-radiation organic glass containing tantalum and its preparation method

A plexiglass and radiation protection technology, applied in the field of radiation protection plexiglass preparation, can solve the problems of high lead toxicity, high temperature resistance and hardness, and achieve the effects of improving heat resistance, avoiding pollution, and having broad application prospects.

Active Publication Date: 2021-07-16
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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Problems solved by technology

[0003] Lead is highly toxic, and lead-containing radiation-proof plexiglass has disadvantages such as low temperature resistance and low hardness. In order to avoid lead pollution caused by lead-containing plexiglass and obtain radiation-proof plexiglass with better performance, all countries are committed to developing Anti-radiation plexiglass with better comprehensive performance

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  • A kind of anti-radiation organic glass containing tantalum and its preparation method

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preparation example Construction

[0025] In the first aspect, the present invention provides a method for preparing anti-radiation organic glass containing tantalum, see figure 1 , the method at least includes the following steps S110 to S140:

[0026] Step S110 is to prepare Ta 2 o 5 Nanowire, the Ta 2 o 5 The powder particles are fully dissolved in the hydrofluoric acid solution, and then ammonia water is added to adjust the solvent to a predetermined alkaline pH value to obtain Ta(OH) 5 After the white precipitate, the precipitate was washed, and then dissolved in the mixed solution of hydrogen peroxide and ammonia water to obtain Ta 2 o 5 After the reaction precursor is transferred to the high pressure reactor for reaction, the resulting Ta 2 o 5 The nanowire precipitate was washed and freeze-dried to obtain Ta 2 o 5 nanowire powder. Ta 2 o 5 The nanostructure is easier to disperse in the matrix, in addition, due to the small size effect, the performance is more excellent.

[0027] Step S120 i...

Embodiment 1

[0032] Step S110, preparing Ta 2 o 5 Nanowire: Weigh 4g Ta 2 o 5 Add the powder particles into 40mL of hydrofluoric acid solution, put it in an oil bath at 110°C and stir for 2h to make Ta 2 o 5 The powder dissolves well. After dissolving, cool naturally to room temperature, add ammonia water to adjust the pH value of the solvent to 9.0, and obtain Ta(OH) 5 White precipitate. The precipitate was washed with deionized water and redissolved in a mixed solution of 120mL hydrogen peroxide and ammonia water (volume ratio 5:1) to obtain Ta 2 o 5 reaction precursors. For safety considerations, the precursor was heated at 60 °C for 1 h to promote the decomposition of hydrogen peroxide. Then the solution was transferred to an autoclave and reacted at 240 °C for 24 h. After the reaction finished, treat that the autoclave was down to room temperature, and the obtained Ta 2 o 5 The nanowire precipitate was repeatedly washed with deionized water and ethanol and centrifuged. Fi...

Embodiment 2

[0037] Step S110 and step S120 in embodiment 1 are all the same as embodiment 1, the difference is:

[0038] In step S130, Ta 2 o 5 When grafting macromolecular initiators on the surface of nanowires: add 2.5g of Ta 2 o 5 Nanowires.

[0039] In step S140, when preparing tantalum-containing anti-radiation organic glass: add 37.5 g of MMA to the spherical bottle after the reaction in the previous step, and finally obtain anti-radiation organic glass with excellent performance.

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Abstract

The invention relates to a tantalum-containing anti-radiation organic glass and a preparation method thereof. The method comprises: preparing Ta 2 o 5 nanowire; on Ta 2 o 5 Nanowire surface modification; Ta 2 o 5 Grafting macromolecular initiators on the surface of nanowires; preparing anti-radiation organic glass containing tantalum. The present invention selects Ta 2 o 5 As the source of tantalum, by preparing Ta 2 o 5 The nanowires enhance their dispersion in the matrix, and choose the appropriate method in the Ta 2 o 5 The surface is grafted with a functional polymer, which is used as a macromolecular initiator to initiate the bulk polymerization of MMA, and the prepared tantalum-containing anti-radiation organic glass has excellent anti-radiation performance in a wide energy range, showing high strength and Good mechanical properties such as toughness have broader application prospects.

Description

technical field [0001] The invention relates to the technical field of radiation-proof organic glass preparation, in particular to a radiation-proof organic glass containing tantalum and a preparation method thereof. Background technique [0002] With the development of national defense technology, more stringent requirements are put forward for aviation transparent parts. In addition to meeting the requirements of structural strength and optical performance, they should also have special functions such as radiation protection and electromagnetic shielding to meet the operational needs of special environments. . The difference between anti-radiation plexiglass and ordinary plexiglass is that some special heavy metal elements, such as lead, gadolinium, samarium, etc., can absorb the radiation energy produced by neutrons and gamma rays are added. The current research results show that lead-containing plexiglass has the best radiation resistance and is therefore the most widel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F292/00C08F220/14
Inventor 张博郭新涛王芳刘滢
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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