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Boron nitride-polyethylene space radiation protection composite material and preparation method of composite material

A technology of space radiation and composite materials, which is applied in the field of polyethylene space radiation protection composite materials and its preparation, can solve the problems of poor thermal stability and low efficiency of pure aluminum filtering protons, and achieve good thermal stability, normal temperature and low temperature impact resistance Excellent performance and good melt fluidity

Active Publication Date: 2013-01-09
HARBIN INST OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The present invention provides a boron nitride-polyethylene to solve the technical problems of poor thermal stability of the existing polyethylene used for space radiation protection materials and low efficiency of filtering protons by pure aluminum under the same mass thickness. Composite material for space radiation protection and preparation method thereof

Method used

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  • Boron nitride-polyethylene space radiation protection composite material and preparation method of composite material
  • Boron nitride-polyethylene space radiation protection composite material and preparation method of composite material
  • Boron nitride-polyethylene space radiation protection composite material and preparation method of composite material

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specific Embodiment approach 1

[0024] Embodiment 1: A boron nitride-polyethylene space radiation protection composite material in this embodiment is composed of polyethylene resin with a mass fraction of 50-95%, 0-15% coupling agent and 2-35% nano Composition of boron nitride.

specific Embodiment approach 2

[0025] Specific embodiment two: the preparation method of a kind of boron nitride-polyethylene space radiation protection composite material of this embodiment is carried out according to the following steps:

[0026] 1. Weigh polyethylene resin, coupling agent and boron nitride according to the mass fraction of polyethylene resin, coupling agent and boron nitride being 50-95%, 0-15% and 2-35% respectively;

[0027] 2. Weigh ethanol according to the mass ratio of ethanol and boron nitride in step 1 as 1~8:1, and add it together with boron nitride in step 1 into the high-speed disperser, and disperse for 1~12h;

[0028] 3. Transfer the mixture in step 2 to a beaker, and add the coupling agent weighed in step 1 into the beaker, then place the beaker in a constant temperature water bath, and stir for 1~15 hours at a temperature of 50~120°C , suction filtration, and drying to obtain modified boron nitride;

[0029] 4. Add the polyethylene resin weighed in step 1 and the modified ...

specific Embodiment approach 3

[0031] Specific embodiment three: the difference between this embodiment and specific embodiment two is that the polyethylene resin in step one is one or more of low-density polyethylene, high-density polyethylene, and ultra-high molecular weight polyethylene resin. The mixing of ratio, other steps and parameter are identical with embodiment two.

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Abstract

The invention discloses a boron nitride-polyethylene space radiation protection composite material and a preparation method of the boron nitride-polyethylene space radiation protection composite material.The invention relates to a polyethylene space radiation protection composite material and a preparation method of the polyethylene space radiation protection composite material. The invention is used for solving the technical problem that the conventional polyethylene for preparing the space radiation protection material has low thermal stability and low efficiency of filtering protons with pure aluminum in the same mass and thickness. The preparation method disclosed by the invention comprises the following steps of: adding ethanol and boron nitride into a container, then, adding a coupling agent, and reacting in constant temperature water, so as to obtain modified boron nitride, and finally, adding the polyethylene and the boron nitride into a high mixing machine, so as to obtain the boron nitride-polyethylene space radiation protection composite material. The boron nitride-polyethylene composite material prepared with the preparation method disclosed by the invention has a thermal degradation temperature of 430-520 DEG C and high thermal stability, compared with the pure aluminum, efficiency of filtering the protons can be increased for almost 0.4-1 times, an integrated performance is excellent, and the boron nitride-polyethylene space radiation protection composite material has a wide application prospect in radiation protection of spacecrafts.

Description

technical field [0001] The invention relates to a polyethylene space radiation protection composite material and a preparation method thereof. technical background [0002] Near-Earth space is the main activity area of ​​various manned spacecraft, application satellites, and space stations. There are a large number of high-energy charged particles captured by the geomagnetic field in the region, with energies ranging from tens of keV to hundreds of MeV, which pose a serious threat to spacecraft in orbit. With the rapid development of my country's manned spaceflight industry, the space radiation protection materials Research is of increasing importance. In the future, my country's space station plan is an important means for my country to enter the ranks of world powers. Astronauts in the space station need to work in space for a long time. Therefore, how to effectively improve the radiation protection performance of spacecraft has long-term strategic significance. After year...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F1/10C08L23/06C08K9/04C08K9/06C08K3/38
Inventor 李兴冀杨剑群何世禹杨德庄芮二明
Owner HARBIN INST OF TECH
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