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Urea formaldehyde-based biomimetic material, preparation method and application thereof

A technology of urea-formaldehyde and urea-formaldehyde resin, which is applied in the field of bionic materials, can solve problems such as large amount of calculation, and achieve the effects of less uncontrollable factors, simple operation and convenient calculation

Active Publication Date: 2019-04-19
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mathematical models do not require experiments, but are computationally intensive and require formula and parameter support (Li Shijun. Estimation of internal exposure dose of inhaled uranium compounds[J]. Radiation Protection, 1985,1:24-33)

Method used

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  • Urea formaldehyde-based biomimetic material, preparation method and application thereof
  • Urea formaldehyde-based biomimetic material, preparation method and application thereof
  • Urea formaldehyde-based biomimetic material, preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation method of urea-formaldehyde-based biomimetic material, concrete steps are as follows:

[0034] Step 1: Soak pig kidney in butanol solution for 4 hours to remove oil, and hydrolyze for 30 minutes at 85-90° C. and pH 4.0-4.5.

[0035] Step 2, according to the preparation method of alkali-acid-alkali, according to the ratio of the total mass of amino acids in the pig kidney hydrolyzate to the mass ratio of urea is 0.25:1, 0.5:1, 0.75:1, 1:1 and 1.25:1 respectively, in In the acidic stage of urea-formaldehyde resin synthesis, pig kidney hydrolyzate was added to prepare urea-formaldehyde-based biomimetic materials with different mass ratios. Depend on figure 1 It can be seen that when the total mass of amino acids in the pig kidney hydrolyzate and the mass ratio of urea are 0.75:1, the prepared urea-formaldehyde-based biomimetic material has the largest adsorption capacity for uranium.

[0036] Step 3: Take the urea-formaldehyde-based biomimetic material th...

Embodiment 2

[0038] A method for preparing a tubular uranium-containing urea-formaldehyde-based biomimetic material, the specific steps are as follows:

[0039] Step 1. Under the condition of constant temperature and oscillation at 37°C, place the tubular urea-formaldehyde-based biomimetic material in a uranium solution with a concentration of 1g / L for adsorption, and the adsorption time is 12h to obtain a tubular uranium-containing urea-formaldehyde-based biomimetic material. Concentration, according to the formula Q 吸附 =(C 0 -C e )×V / m, calculate the uranium content Q of tubular uranium-containing urea-formaldehyde-based biomimetic materials 吸附 , where Q 吸附 is the uranium content of the tubular uranium-containing urea-formaldehyde-based biomimetic material, mg / g; C 0 is the initial concentration of uranium liquid, mg / L; C e is the concentration of liquid uranium after the reaction time t, mg / L; V is the volume of liquid uranium, L; m is the mass of the tubular urea-formaldehyde-base...

Embodiment 3

[0043] Material Performance Characterization Testing

[0044] 1. Scanning electron microscope morphology analysis (SEM)

[0045] Scanning electron microscopy analysis of the image 3 As shown, the morphology of the prepared samples was characterized by Quanta 250FSEM field emission scanning electron microscope produced by FEI Company of the United States, and the accelerating voltage was 30kV. image 3 (a) and image 3 (b) are the changes in the morphology of the urea-formaldehyde-based biomimetic material before and after the adsorption of uranium. The surface of the material becomes denser after the adsorption of uranium, and the distribution is more concentrated, which may be due to the UO 2 2+It is caused by the cross-linking filling effect; and the shape of the material does not change much before and after the adsorption of uranium, indicating that the structure of the material has a certain stability.

[0046] 2. Fourier transform infrared spectroscopy (FT-IR)

[0...

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Abstract

The invention discloses a urea formaldehyde-based biomimetic material, a preparation method and application thereof. Specifically, pig kidney hydrolysate is added at the urea formaldehyde resin acidicpolycondensation stage for copolymerization reaction to obtain the urea formaldehyde-based biomimetic material, then the urea formaldehyde-based biomimetic material is sintered and compressed into atubular urea formaldehyde-based biomimetic material, then the tubular urea formaldehyde-based biomimetic material is subjected to adsorption of uranium to obtain a tubular uranium-containing urea formaldehyde-based biomimetic material for simulating uranium-containing kidney protein tissues, and finally cyclic desorption in a decorporation drug solution is employed to evaluate the decorporation effect of the decorporation drug on uranium in the material. The invention realizes in-vitro simulation of the desorption process of the decorporation drug on uranium in the kidney, and achieves quick judgment of the effect of the decorporation drug.

Description

technical field [0001] The invention belongs to the technical field of bionic materials, and relates to a urea-formaldehyde-based bionic material and a preparation method and application thereof. Background technique [0002] Water body uranium pollution has always been a major concern of people, uranium in water is mainly UO 2 2+ Exist in form, when people mistakenly drink uranium-containing water, UO 2 2+ Absorbed into the blood through the intestinal tract, and finally transferred to liver, kidney, bone and other organs and tissues. Uranium is chemically toxic and radioactive, and it is mainly chemically toxic to the liver and kidney. The combination of uranium and the liver will cause degeneration and necrosis of liver cells, and cause liver lesions to varying degrees. After uranium enters the kidney, it will combine with the protein tissue in the kidney. The main pathological changes in the kidney after poisoning are the degeneration, necrosis and shedding of renal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G12/40B01J20/26B01J20/30
CPCB01J20/262B01J20/30C08G12/40
Inventor 唐双凌戴君诚王书嘉周沐春费玲
Owner NANJING UNIV OF SCI & TECH