A kind of lead-free γ-ray shielding flexible composite material and preparation method thereof

Abstract

The invention discloses a leadless gamma ray shield flexible composite material and a preparation method thereof. The method comprises the following steps: aqueous polyurethane and a proper amount ofa thickening agent I are mixed, a mixture is dispersed at a low speed by a dispersing sand mill, a gamma ray screener is slowly added during a dispersing process, after dispersion, a few of a thickening agent II, an antifoaming agent, a dispersant, and a coupling agent are added in order; the dispersing speed is adjusted to a rapid state, the materials are dispersed for 20 min, a few of the antifoaming agent is added, and then rapid dispersion is kept for 10 min; and ultrasonic dispersion is performed on the above mixture for 20 min; vacuum-pumping treatment is performed on the above mixture to remove bubbles, and a paint is obtained; fabric base cloth is fixed on a pin frame of a coating machine, the above prepared paint is employed for coating treatment on the base cloth, the coating fabric is aired for 2 hours at room temperature, then the fabric is placed in a baking oven and the fabric is dried for 1 hour at the temperature of 60 DEG C, and the coating fabric is aired for 24 hoursat room temperature to obtain the leadless gamma ray shield flexible composite material.

Description

technical field [0001] The invention belongs to the technical field of shielding materials, in particular to a lead-free γ-ray shielding flexible composite material and a preparation method thereof Background technique [0002] With the application of nuclear technology and the development of atomic energy, various high-energy rays are widely used in various fields such as medicine, communication, military, industry, agriculture, and scientific research. However, nuclear energy and the application of nuclear technology are a double-edged sword. Safety issues and radioactive pollution prevention and control issues in the process of nuclear technology development and utilization are very important. Nuclear radiation can cause genetic mutations in human cells, radiation sickness, and even death. [0003] Gamma rays not only reflect its good application value, but also have great radiation hazards to the surrounding environment, pose a serious threat to human health, and can ind...

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Problems solved by technology

However, the protection effect of the materials prepared by these methods is not satisfactory, and the preparation process is complicated, the cost is high, and it is difficult to meet the needs of industrial development

[0004] At present, among gamma-ray protective materials, lead-containing materials are dominant. However, lead has some disadvantages as a radiation protection material. Lead itself is a source of heavy metal pollution, and it is easy to cause heavy metal poisoning during use. Due to the high mobility of Pb element, it is easy to Moving out of composite materials will cause harm to the contacts and the environment, especially to the safety threats to personnel engaged in radioactive work. In addition, lead materials also have secondary radiation, poor hardness, poor structural strength, and high temperature resistance, etc. There are disadvantages, therefore, lead materials as nuclear radiation shielding materials can no longer meet the needs of modern protection concepts

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