A kind of high Z element-natural leather composite X-ray shielding material and its preparation method

A technology of natural leather and shielding materials, applied in special leather manufacturing, leather impregnation, small raw hide/large raw hide/leather/fur treatment, etc., can solve problems such as hazards, lack of pore structure, poor water and gas permeability, etc., and achieve a wide range of applications , avoid reunion, strong universal effect

Active Publication Date: 2021-07-23
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the polymer-based nanocomposites currently prepared still have the following problems: (1) due to poor compatibility, the mixing of synthetic polymers and high Z element oxide nanoparticles is not uniform; (2) the high Z element oxide nanoparticles have a fixed crystal form, which will generate strong secondary radiation at a specific angle, which may cause harm to other people around; (3) the mechanical strength of the prepared composite material is not high, and will (4) The prepared composite material lacks pore structure, poor water and gas permeability, and insufficient wearability

Method used

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  • A kind of high Z element-natural leather composite X-ray shielding material and its preparation method
  • A kind of high Z element-natural leather composite X-ray shielding material and its preparation method
  • A kind of high Z element-natural leather composite X-ray shielding material and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0046] Weigh 1 part of SrCl 2 ·6H 2 O was dissolved in 15 parts of deionized water, and the pH of the solution was adjusted to 3.0 with HCl. One part of chrome-tanned cowhide with a thickness of 1.0 mm was placed in the prepared salt solution, and ultrasonic-assisted reaction was used at 20 °C for 0.5 h, and then The samples were dried in an oven at 60 °C to obtain nano-strontium chloride-cowhide composites.

[0047] The obtained composite material was tested and found that the shielding efficiency of the composite material for X-rays with an average energy of 16 keV and a half-value layer of 0.32 mm Al reached 95%, and for X-rays with an average energy of 48 keV and a half-value layer of 0.32 mm The X-ray shielding efficiency of 0.24 mm Cu reaches 36%. Then its tear strength is tested, and it is obtained as Figure 12 Stress–elongation images of the nanostrontium chloride–pigskin composite shown. It can be seen from the figure that the prepared composite has excellent tea...

Embodiment 2

[0049] Weigh 2 parts of AgNO 3 Dissolve in 198 parts of deionized water, use HCl to adjust the pH of the solution to 4.0, take 1 part of chrome-tanned sheepskin with a thickness of 0.7 mm in the prepared salt solution, shake and react at 35 °C for 1 h, and then soak the sample Dehydration in excess acetone can get nano-silver nitrate-sheepskin composite material.

[0050] The obtained composite material was tested and found that the shielding efficiency of the composite material for X-rays with an average energy of 16 keV and a half-value layer of 0.32 mm Al reached 68%, and for X-rays with an average energy of 48 keV and a half-value layer of The X-ray shielding efficiency of 0.24 mm Cu reaches 17%. Then the material was scanned by electron microscope, and the figure 1 SEM image of the nanosilver nitrate–sheepskin composite shown. It can be seen from the figure that a large number of silver nitrate nanoparticles are loaded on the sheepskin fiber, and the distribution is r...

Embodiment 3

[0052] Weigh 36 parts of SnCl 4 Dissolve 84 parts of acetone, take 1 part of chrome-tanned pigskin with a thickness of 1.5 mm in the prepared salt solution, shake the reaction at 10 °C for 2 h, and then place the sample in a vacuum drying oven to dry, that is Nanoscale tin chloride-pigskin composites are available.

[0053] According to the test of the prepared composite material, the composite material has a shielding efficiency of 73% for X-rays with an average energy of 16 keV and a half-value layer of 0.32 mm Al. The X-ray shielding efficiency of 0.24 mm Cu reaches 24%. After testing, the tear strength of the material is 53 N mm –1 , it can be seen that the prepared composites have excellent tear strength.

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Abstract

The preparation method of the high Z element-natural leather composite material disclosed by the present invention is to immerse the leather produced by the conventional tanning process in a salt solution containing high Z element, and use a large number of active functional groups in the leather to combine with high Z element ions to obtain High Z element nanoparticles – natural leather composite X-ray shielding material. The preparation process of the method provided by the invention is simple and controllable, the material sources are abundant, the price is low, the reaction conditions are mild, no special processing equipment is needed, and industrial scale-up production is easy. The high Z element-natural leather composite material prepared by the method of the invention has low density and light weight, and when it is applied to X-ray shielding, the material has excellent shielding performance and reduces secondary radiation. In addition, the material not only solves the shortcomings of poor mechanical properties of traditional polymer shielding materials, but also provides good wearing comfort.

Description

technical field [0001] The invention belongs to the technical field of functional materials and their preparation, in particular to a natural leather-based X-ray shielding material with light weight, low scattering, high shielding performance and high mechanical strength and a preparation method thereof. Background technique [0002] With the development of nuclear physics, ionizing radiation is increasingly used in people's daily life, such as medical imaging, radiation therapy, metal flaw detection and material characterization. At the same time, in nature and industrial production, ionizing radiation often appears as a by-product (Nambiar S, Yeow J T W. Polymer-Composite Materials for Radiation Protection[J]. ACS Applied Materials & Interfaces, 2012, 4(11) :5717–5726.). However, if the human body is exposed to ionizing radiation for a long time, DNA will be damaged to varying degrees, causing cell mutation, and then leading to symptoms such as vomiting, diarrhea, catarac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C9/00C14C13/00
CPCC14C9/00C14C13/00
Inventor 廖学品王亚平李倩王亚楠周建飞曾运航黄鑫石碧
Owner SICHUAN UNIV
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