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Preparation of rare-earth oxide / natural rubber composite material for X radiation protection

A rare earth oxide and natural rubber technology, which is applied in the treatment of dyed low-molecular organic compounds, radiation safety devices, etc., can solve the problems of unfavorable weight of anti-X-ray materials, low weight percentage, environmental pollution, etc., to save separation cost, Low production cost, the effect of reducing production cost

Inactive Publication Date: 2011-05-04
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its advantage is that it is non-toxic, easy to clean and disinfect, and can still maintain good physical and mechanical properties when the filler content is high, but because the weight percentage of barium in the compound is too low (59%), it is not conducive to anti-X Ray material weight reduction
[0004] my country's Zhang Qixin (CN1073263C) and others invented a composite shielding material containing mixed lanthanide elements for medical X-ray protection. Its advantages are strong ray absorption, light weight and low cost. Therefore, it will cause a certain degree of pollution to the environment

Method used

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  • Preparation of rare-earth oxide / natural rubber composite material for X radiation protection
  • Preparation of rare-earth oxide / natural rubber composite material for X radiation protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of the rare earth oxide / natural rubber composite material that is used for X-ray protection, it comprises the steps:

[0023] 1) Pretreatment of rare earth oxides: according to the parts by weight of each raw material: 100 parts of rare earth oxides, 3 parts of coupling agents, select rare earth oxides and coupling agents; place rare earth oxides and coupling agents in In the high-speed mixer, stir at a high speed of 1200r / min for 10min to obtain the pretreated rare earth oxide for subsequent use; the coupling agent is a titanate coupling agent, which is NTC-201 produced by Nanjing Shuangzha Chemical Factory;

[0024] The rare earth oxide is a single rare earth oxide, lanthanum oxide (La 2 o 3 ).

[0025] 2) Selection of raw materials: according to the formula in Table 1, select natural rubber, pretreated rare earth oxide, zinc oxide, stearic acid, sulfur, benzothiazole disulfide (accelerator DM) and softener, and set aside; Described softening...

Embodiment 2

[0028] Basically the same as Example 1, the difference is: the rare earth oxide used is a mixture (lanthanum oxide and cerium oxide), wherein lanthanum oxide (La 2 o 3 ) and cerium oxide (Ce 2 o 3 ) each account for 50% by weight, and the ratios of rare earth oxides and natural rubber are different, see Table 1.

Embodiment 3

[0030] Basically the same as Example 1, the difference is that used is a single rare earth oxide, europium oxide (Eu 2 o 3 ), commercially available. And the ratio of rare earth oxide and natural rubber is different, see Table 1.

[0031] Lead equivalent test conditions: X-ray tube voltage 100kV, half-value layer 0.16mmCu, the lead equivalent of each sample is the average value of the measurement results of three different parts.

[0032] X-ray absorptivity test: The inherent filter of the X-ray machine is 2mmAl, and the absorptivity of each sample is the average value of the measurement results of three different parts.

[0033] X-ray absorption rate=(1-air kerma rate passing through the sample / incident air kerma rate)×100%.

[0034] The test results of Examples 1-3 are shown in Table 1 and Table 2. From the obtained results, the rare earth oxide / natural rubber composite material for X-ray protection prepared by the present invention not only has excellent shielding perfo...

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Abstract

The invention belongs to the field of medical X-ray protection materials and relates to a method for preparing rare earth oxide / caoutchouc composite materials that are used for X-ray protection. The method is characterized by including the following steps: 1) pretreatment of rare earth oxide; 2) selection of raw materials: selecting 100 parts of caoutchouc, 200-800 parts of pretreated rare earth oxide, 2-8 parts of zinc oxide, 0.2-1 part of stearic acid, 1-5 parts of sulfur, 0.5-4 parts of benzothiazole disulfide and 5-50 parts of softener according to parts by weight; and 3) the pretreated rare earth oxide, the caoutchouc, the zinc oxide, the stearci acid, the sulfur, the softener and the benzothiazole disulfide are sequentially added into internal mixer or an open mill, and mixing the materials for 5-60min under the blending temperature between 30-100 DEG C, thus obtaining the rare earth oxide / caoutchouc composite materials that are used for X-ray protection. The method has simple process and low production cost, and the prepared composite material is characterized by innocuity, light weight and strong ray absorption capacity.

Description

technical field [0001] The invention belongs to the field of medical X-ray protective materials, and in particular relates to a preparation method of a rare earth oxide / natural rubber composite material used for X-ray protection. Background technique [0002] As we all know, in medical X-ray examination, especially in interventional radiology procedures such as cardiovascular angiography and angioplasty and fine surgery, medical workers must be exposed to X-ray fields for a long time. Exposure to X-rays for a long time can cause damage to the gonads, mammary glands, and red bone marrow of the human body. If the dose exceeds a certain level, it will also cause diseases such as leukemia and bone tumors, which pose a serious threat to life. At present, the vast majority of anti-X-ray materials at home and abroad are made of rubber plates filled with lead, lead oxide or other lead salts, or laminated with lead foil covered by polymer films. The use of these protective materials...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L7/00C08K13/02C08K9/04C08K3/22C08K5/09C08K3/06C08K5/36C09C3/08A61B6/10
Inventor 江学良
Owner WUHAN INSTITUTE OF TECHNOLOGY
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