Lead-free coating for shielding X-rays and preparation method of lead-free coating

Abstract

The invention relates to the field of shielding coatings, in particular to a lead-free coating for shielding X-rays and a preparation method of the lead-free coating. The lead-free coating comprises raw materials in percentage by mass as follows: raw material A: 0-85wt% of tungsten powder, 0-80wt% of bismuth powder and 15wt%-20wt% of acrylic resin; raw material B: 90wt%-95wt% of alcohol and 5wt%-10wt% of a silane coupling agent; each of the raw material A and the raw material B accounts for 50% of total weight. The preparation process of the lead-free coating comprises the following steps: S1,modifying the tungsten powder and the bismuth powder; S2, adding the acrylic resin to a mixing container, and adding the tungsten powder and the bismuth powder under stirring; S3, adding an anti-settling agent accounting for 1% by mass of the coating and a defoamer accounting for 1% by mass of the coating after stirring is performed for 6 h; S4, adding a dilution regulator for regulating viscosity according to required viscosity. Compared with the prior art, the novel ray shielding coating is prepared from the tungsten powder and the bismuth powder as filling materials and the acrylic resin as a matrix; the coating can meet requirements of the material for non-toxicity, higher ray absorptivity, wide application and convenient construction.

Description

technical field [0001] The invention relates to the field of shielding coatings, in particular to a lead-free coating for shielding X-rays and a preparation method thereof. Background technique [0002] Since the discovery of X-rays in 1895, natural radioactivity in 1896, artificial radioactivity in 1934, and nuclear fission in 1938, ionizing radiation has been widely used in various industries, agriculture, medical and health institutions, education, research institutions, and nuclear fuel cycle facilities. application and rapid development. In particular, X-ray imaging technology has become an indispensable and important part of modern medicine, and X-rays provide indispensable application value for clinical diagnosis. As we all know, X-rays have a strong penetrability to human tissues, and the penetrating ability to tissues of different densities is different. Therefore, through X-rays, images of human tissue with different levels of black and white can be displayed, an...

AI Technical Summary

Problems solved by technology

[0003] At present, the main anti-radiation materials include anti-radiation lead glass, lead plates, protective doors and various lead protective clothing, etc., but the above-mentioned radiation protection materials are not only poisonous but also hard in texture, and cannot be well pasted on surfaces with curved structures and complex shapes. Effective radiation protection is carried out on the periphery of equipment and instruments, and the development of science is changing with each passing day. From a modern scientific point of view, this material can no longer meet the needs of social development.