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Amidoxime-based magnetic polyphosphazene nano-microspheres with core-shell structure and preparation thereof as well as application of amidoxime-based magnetic polyphosphazene nano-microspheres serving as uranium adsorbent

A technology of nano-microspheres and polyphosphazene, which is applied in nuclear engineering, radioactive purification, and other chemical processes, can solve the problems of low utilization rate and complicated synthesis methods, and achieve enhanced hydrophilicity, large adsorption capacity, and good The effect of surface adsorption effect

Active Publication Date: 2018-10-26
EAST CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis method of this kind of polymer material is complicated, and the amidoxime block with good adsorption performance for uranium is in the polymer chain, so the utilization rate is not high.

Method used

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  • Amidoxime-based magnetic polyphosphazene nano-microspheres with core-shell structure and preparation thereof as well as application of amidoxime-based magnetic polyphosphazene nano-microspheres serving as uranium adsorbent
  • Amidoxime-based magnetic polyphosphazene nano-microspheres with core-shell structure and preparation thereof as well as application of amidoxime-based magnetic polyphosphazene nano-microspheres serving as uranium adsorbent
  • Amidoxime-based magnetic polyphosphazene nano-microspheres with core-shell structure and preparation thereof as well as application of amidoxime-based magnetic polyphosphazene nano-microspheres serving as uranium adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] After ultrasonically dispersing the prepared magnetic particles in acetonitrile for 10 min, 3.476 g of hexachlorocyclotriphosphazene HCCP, 7.51 g of 4,4'-dihydroxydiphenyl sulfone BPS and 9.09 g of triethylamine were added to the solution, at 40 Ultrasonic water bath at ℃ for 2 hours (150 watts, 80kHZ), centrifuged, washed with ethanol, and dried in vacuum to obtain active hydroxyl polyphosphazene microspheres;

[0046] Add 0.5g of active hydroxyl polyphosphazene nanospheres and 1g of ferrous sulfate heptahydrate to 50mL of deionized water, and after ultrasonic vibration at 30°C for 5min, add 2g of acrylonitrile and 2g of 30% peroxygen water, and stir at 25°C for 5h , to obtain polyphosphazene nanospheres containing active cyano groups;

[0047] 1 g of activated cyanopolyphosphazene nanospheres and 5 g of NH 2 Add OH·HCl to 100 g of deionized water, adjust the pH to 8.0, stir at 80°C for 4 hours, and separate the final product with a magnet to obtain the amidoxime-base...

Embodiment 2

[0052] After the prepared magnetic particles were ultrasonically dispersed in acetonitrile for 10 min, 3.476 g of hexachlorocyclotriphosphazene HCCP, 4.41 g of hydroquinone and 9.09 g of triethylamine were added to the solution, and ultrasonic water bath was carried out at 40°C for 2 h (150 Watts, 80kHZ), after centrifugation, wash with ethanol and vacuum-dry to obtain active hydroxyl polyphosphazene microspheres;

[0053] Add 0.5g of polyphosphazene nanospheres containing active hydroxyl groups and 1g of ferrous sulfate heptahydrate to 30mL of deionized water. After ultrasonic vibration at 30°C for 20min, add 1g of acrylonitrile and 1g of 30% peroxygen water, and stir at 35°C for 3h Finally, polyphosphazene nanospheres containing active cyano groups are obtained;

[0054] 1 g of activated cyanopolyphosphazene nanospheres and 5 g of NH 2 Add OH·HCl to 100 g of deionized water, adjust the pH to 8.0, stir at 80°C for 4 hours, and separate the final product with a magnet to obta...

Embodiment 3

[0056] After ultrasonically dispersing the prepared magnetic particles in acetonitrile for 10 min, add 3.476 g of hexachlorocyclotriphosphazene HCCP, 6.84 g of bisphenol A and 9.09 g of triethylamine into the solution, and ultrasonically disperse them in a water bath at 40°C for 2 h (150 watts , 80kHZ), after centrifugation, wash with ethanol and vacuum-dry to obtain active hydroxyl polyphosphazene microspheres;

[0057] Add 1g of active hydroxyl polyphosphazene nanospheres and 2g of ferrous sulfate heptahydrate to 50mL of deionized water, and after ultrasonic vibration at 40°C for 10min, add 2g of acrylonitrile and 2g of 30% peroxygen water, and stir at 35°C for 3h, Obtaining polyphosphazene nanospheres containing active cyano groups;

[0058] 1 g of activated cyanopolyphosphazene nanospheres and 5 g of NH 2 Add OH·HCl to 100 g of deionized water, adjust the pH to 8.0, stir at 80°C for 4 h, and separate the final product with a magnet to obtain the magnetic polyphosphazene n...

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Abstract

The invention discloses amidoxime-based magnetic polyphosphazene nano-microspheres with a core-shell structure and preparation thereof as well as application of the amidoxime-based magnetic polyphosphazene nano-microspheres serving as a uranium adsorbent. Surfaces of magnetic iron nanoparticles are coated with polyphosphazene; then the polyphosphazene is grafted with polyacrylonitrile and the polyacrylonitrile is subjected to hydroximation to obtain the amidoxime-based magnetic polyphosphazene nano-microspheres with the core-shell structure. The surfaces of the microspheres have rich amidoxime-based functional groups so that the microspheres have good dispersity in a water system and have a large adsorption amount and high selectivity on uranium in a water solution system; the microsphereshave magnesium and are easy to separate from water, and have a relatively good application prospect in the aspects of treating radioactive wastewater and extracting the uranium from seawater.

Description

technical field [0001] The invention relates to a functional polymer material, in particular to an amidoxime-based core-shell magnetic polyphosphazene nanosphere and its preparation, and also relates to the enrichment and separation of amidoxime-based core-shell magnetic polyphosphazene nanospheres containing A method for uranium in uranium wastewater belongs to the technical field of radioactive wastewater treatment. Background technique [0002] Radioactive wastewater has become a major problem due to its high hazard, long-term effect and difficult disposal. At present, there is no absolutely safe and easy way to deal with it. The hazards of uranium-containing wastewater are mainly manifested in the various rays produced by uranium in the wastewater, which have harmful effects on human tissues and organs under large radiation doses. Compared with other pollution, uranium-containing wastewater pollution has the following characteristics: once uranium-containing wastewater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C08G79/025G21F9/12
CPCB01J20/264B01J20/28009B01J20/28021C08G79/025G21F9/12
Inventor 刘妍袁定重王云戴荧朱业安
Owner EAST CHINA UNIV OF TECH
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